In today's daily lifeThe Internet has become a part of lifeAway from your phone and computerThere will be much less joy in life The screen serves as a carrier for sharing fun on the InternetIt has been widely used in various productsFrom large to smallVarious kindsThe whole nine yardsChildren's phone watchesCarry your phone with youTablet for work and officeA giant screen full of technology ............... Zhanhui ZH035BC0003-01 TFTLCD (3.5inch 320*240 350nit IPS LCD 54pins RGB+SPI) Although we use it a lotBut the screen is also divided into many typesThe experience of adapting to different screens is also differentToday, I will tell you about XiaozhanWhat is LCD (Liquid Crystal Display) 01 — Origin Zhanhui ZH116BH002-01B1 TFT LCD (11.6inch  1920*1080 1000nit  IPS lcd 30pins EDP)       LCD (full name is Liquid Crystal Display). At the end of the 19th century, an Austrian botanist discovered liquid crystals, a substance that combines the fluidity of a liquid with the arrangement of crystals. Under the action of electricity, the arrangement of liquid crystal molecules will change, affecting its optical properties, a phenomenon that the scientific community calls the electro-optical effect.      British scientists relied on this principle to create the first liquid crystal display, the LCD, in the last century. The world's first liquid crystal display device appeared in the early 70s of the 20th century, known as TN-LCD (twisted nematic) liquid crystal display. Then, with the development of the times, screen manufacturing and production are becoming more and more mature, and it is these great scientists who allow us to enjoy a visual feast. 02  —  Internal structure Zhanhui ZH101BH060-02B LCD (7inch 1024*600  IPS 50PIN 1000nit)      The screen doesn't look thin, although the sparrow is small, the internal organs are complete, and the internal structure inside contains many, mainly composed of LCD panels and backlight plates. Here is a small exhibition to give you a knowledge, LCD screen is actually a non-active light-emitting electronic device, it itself does not have luminous characteristics, the two structures must take care of each other to obtain the performance of the display.     LCD panel is composed of polarizing film, glass substrate, black matrix, color filter, protective film, ordinary electrode, calibration layer, liquid crystal layer (liquid crystal, spacer, sealant), capacitor, display electrode, prism layer, astigmatism layer, etc., which will be increased or decreased according to the use environment of the LCD panel. The backlight module includes an illumination light source, reflector, light guide plate, diffuser, brightening film (prism sheet) and frame. Therefore, the production environment of LCD panels is also very strict, mainly relying on automated production equipment for precise production, dust-free workshop to ensure functional use, and then need to go through multiple inspections and inspections before it is considered a qualified product. 03—  How it works Zhanhui ZH101HH058-03B TFT lcd (10.1inch 1280*800 300nit IPS lcd 40pins LVDS)      Liquid crystal is a kind of organic compound between solid and liquid states, under room temperature conditions, it shows both liquid fluidity and crystal optical anisotropy, which becomes a transparent liquid state when heated and becomes a crystallized turbid solid state after cooling.     Under the action of electric field, the liquid crystal molecules will change in arrangement, which will affect the intensity of the incident light beam through the liquid crystal. According to this, the brightness and darkness of light can be changed through the control of the liquid crystal electric field, so as to achieve the purpose of information display. Therefore, the role of liquid crystal materials is similar to small "light valves". Due to the presence of control circuits and drive circuits around the liquid crystal material. When the electrodes in the LCD generate an electric field, the liquid crystal molecules will be distorted, so that the light passing through it will be refracted in a regular manner, and then filtered by a second layer of polarizer and displayed on the screen. 04 — Select a suggestion Zhanhui ZH101HH058-05 TFT lcd (10.1inch 1280*800 1000nit IPS lcd  20pins LVDS) BrightnessThe maximum brightness of an LCD display is usually determined by the backlight, and it can technically reach high brightness, but this does not mean that the higher the brightness value, the better, because a display that is too high brightness may hurt the viewer's eyes. LCD is a substance between solid and liquid states, which cannot emit light and requires additional light sources. Therefore, the number of lamps is related to the brightness of the liquid crystal display.  Zhanhui ZH116BH002-01B1 TFT LCD (11.6inch 1920*1080 1000nit IPS lcd 30pins EDP) ResolutionResolution refers to the number of pixels displayed per unit area. The physical resolution of the liquid crystal display is fixed, and the implementation in the liquid crystal display is more complicated, and the display effect must be simulated through calculations, and the actual resolution has not changed.   Zhanhui  ZH121PH003-03A TFT LCD (12.1inch 1024*768 1000nit IPS lcd 20pins LVDS) ChromaticityThe important thing about LCD is of course the color expression. We know that any color in nature is composed of three basic colors: red, green, and blue. Most manufacturers produce LCD displays, each basic three primary colors reach 6 bits, that is, 64 degrees of expression, then each independent pixel has 262144 colors.If you want a better color experience, you can use FRC technology to simulate the full-color picture, that is, each three primary colors can reach 8 bits, that is, 256 expressions, then each independent pixel has up to 16777216 colors.  Zhanhui ZH598AH003-01A V2 TFT lcd (5.98inch 1440*2560 1000nit  IPS lcd 50pins MIPI) ContrastContrast is the ratio that defines the maximum brightness value (all white) divided by the minimum brightness value (all black). Accessories such as control ICs, filters, and orientation films used in LCD manufacturing are related to the contrast of the panel.  Zhanhui ZH101BH065-01A TFT LCD (10.1inch 800*1280 300nit IPS lcd 20PINS LVDS) Response timeResponse time refers to the response speed of the liquid crystal display to the input signal, that is, the response time of the liquid crystal from dark to light or from light to dark, usually in milliseconds. The smaller this value, the better, the better the experience. If the response time is too long, there may be a problem with the tail dragging of the LCD display when displaying dynamic images.                 Zhanhui ZH156QH001-01C TFT lcd(15.6inch 1920*1080 1000nit IPS lcd 30PINS EDP) Viewing angleThe viewing angle of the LCD display is symmetrical to the left and right, while the top and bottom are not necessarily symmetrical. When the incident light of the backlight passes through the polarizer, liquid crystal and orientation film, the output light has a specific directional characteristic. In most cases, the light emitted from the screen has a vertical orientation. If you look at a completely black picture from a very oblique angle, you may see white or color distortion. Generally speaking, the upper and lower angles should be less than or equal to the left and right angles.   Zhanhui ZH040BH001-03TFT lcd(4inch 480*480 350nit IPS lcd  40pinsRGB) Viewable areaThe size of the LCD monitor is the actual range of screens that can be used, and the viewing area refers to the maximum range of graphics that your monitor can display.   Zhanhui  ZH055QIFHD001-01A TFT lcd(5.5inch 1080*1920 1000nit IPS lcd 31pins MIPI)

With the development of the timesThe continuous iterative upgrading of LCD screensVarious types of products have entered thousands of households This is inseparable from the efforts of engineers and other departments to allow us  to enjoy good LCD screen servicesToday, I will tell you the story behind the Zhanhui optoelectronic screen Production workshop Starting from the basic theoretical construction, the production and manufacturing technology of LCD screen integrates the technical achievements of various disciplines such as optics, microelectronics, chemistry, electromechanical, and materials, showing the characteristics of multidisciplinary integration. Therefore, the required production machines have high technical requirements and strict workshop construction requirements. From the perspective of technological flow, although LCD screens are very simple from the outside, their manufacturing process is very complex and fine. It includes a series of process flow and control technologies such as graphic production, orientation layer production, empty box production, liquid crystal injection, COG binding, etc. It is necessary to combine these things tightly, and its difficulty is compared to food, which is no less meticulous but delicious than "Wensi Tofu" and "Buddha Jumping Over the Wall". From the perspective of manufacturing, LCD screen production requires advanced production equipment and clean production workshops, as well as a large number of workers with long-term production experience and a large number of technical teams with professional knowledge in the fields of optics, semiconductors, electronics, materials, chemistry, chemical industry, automation control, etc. and have rich practical experience. Screen production is inseparable from the cooperation and promotion of all departments, and all parties work together to make a good screen. Technical requirements The production process of Zhanhui Optoelectronics can be roughly divided into three sections: front, middle and back, and each production section is a puzzle piece to achieve a good screen. But the production of an LCD screen is actually far more than that, if you count all the large and small processes, there are as many as 300 processes and multiple testing steps, and behind each good screen is a lot of hard work! Incoming glass --- cleaning--- applying photosensitive glue--- baking--- exposure--- development--- development inspection--- and --- acid engraving --- graphic inspection after baking The process flow of the front section of the LCD screen, the technology required for screen production, requires the cleanliness of the operating environment to be 1,000 levels dust-free, the temperature is maintained at about ±23 degrees, and the working humidity ± 55RH. Pre-cleaning--- printing--- main curing--- pre-cleaning--- printing--- main curing--- pre-curing--- friction--- cleaning--- printing frame--- pre-baking--- dispensing--- powder spraying--- lamination--- hot pressing The process flow of the middle section of the LCD screen should keep the operating environment clean and dust-free, constant humidity and constant temperature, and at the same time, it should focus on the pre-curing temperature of the frame adhesive, the uniformity of the distribution of silicon powder, the density of the powder spray, and whether there is agglomeration. At this time, the screen has begun to take shape, and grasping the curing time is not only to achieve function, but also to pursue the appearance of the screen, the integrity of the fit, so that it can also have an extra layer of aesthetic color in practical situations. Cutting --- segments--- cuttings--- crystal pouring--- pressurized sealing--- cleaning--- electrical measurement--- color separation--- secondary cleaning--- patch ---COG---TAB--- module The process flow of the back section of the LCD screen, the so-called hundred miles is half ninety, the final step can not be relaxed, the key points to pay attention to are the vacuum of the filling machine, alignment, N2 flow, LC pollution, leveling pressure and other aspects. At this point, the overall screen production has come to an end, but the service purpose of Zhanhui Optoelectronics is not over, we always believe that only by handing over the screen to the user until satisfaction, a good screen can be considered a real sense of production. Product packaging is the last line of defense for the finished screen, and its packaging quality determines the quality of the finished product in the hands of the customer. In order to ensure the original state and quality of the goods, the technical means adopted by Zhanhui Optoelectronics for the products are not damaged or affected during transportation, flow, trading, storage and use. Ensure the integrity of the quality and quantity of the goods themselves, prevent a series of accidents in loading and unloading, handling, stacking, meticulous support measures for soft materials, and tailor-made packaging of products of different sizes to ensure that the products reach customers in a timely and accurate manner.

On average, people spend 3 hours and 15 minutes a day on their phones. Individuals check their phones on average 58 times a day. Filipinos spend the most time on their phones on average every day. Japanese citizens spend less than half as much time on their smartphones as the global average. Most Gen Z people say they spend too much time on their smartphones. With the development of electronic products becoming more and more convenientPeople are also spending more and more time on electronicsVideos and pictures are the medium of conveying informationA good screen is a carrier of informationWhat interface should be used to better light up and endurance? Zhanhui ZH116BH002-01B1 TFT lcd (11.6inch 1920*1080 1000nit IPS Lcd 30pins EDP) Different screens adapt to different interfacesToday, I will tell you about XiaozhanWhat are the interfaces of the LCD screen? 01 — RGB interface Zhanhui ZH043BC018-04 TFTLCD (4.3inch 480*272 450nit IPS LCD 40pins RGB) (1) Interface definition     RGB color is a color standard in the industry, and RGB is obtained by changing the three color channels of red, green,       and blue and superimposing them on each other. This standard includes almost all colors that human vision can perceive      and is one of the most widely used color systems.(2) Interface features The interface is generally 3.3V frequency Synchronized signals are required The image data needs to be refreshed at all times Appropriate timing needs to be configured (3) Maximum resolution and clock frequencyParallel RGB interface: Resolution: 1920*1080 Clock Frequency: 1920108060*1.2 =149MHZ Serial RGB interface: Resolution: 800*480 Clock frequency: 8003480601.2 = 83MHZ 02   —   LVDS interface Zhanhui ZH070BH022-02 TFTLCD (7inch 1024*600 1000nit IPS Lcd 40pins LVDS) (1) Interface definition     LVDS, or Low Voltage Diferental Signaling, is a low-voltage differential signaling technology interface. It is a digital video      signal transmission method developed by NS in the United States to overcome the shortcomings of large power consumption      and high EMI electromagnetic interference when transmitting broadband high bit rate data at TTL level.       The IVDS output interface uses a very low voltage swing to transmit data differentially over two PCB traces or a pair of       balanced cables. The LVDS output interface allows signals to be transmitted at a rate of several hundred Mbit/s on differential       PCB lines or balanced cables, achieving low noise and low power consumption due to the low-voltage and low-current driving methods.(2) Interface type 6-bit LVDS output interface            In the interface circuit, a single transmission is adopted, and each base color signal uses 6-bit data, with a total of            18-bit RGB data, so it is also called 18-bit or 18-bit LVDS interface. Dual 6-bit LVDS output interfaces            In the interface circuit, it adopts dual transmission, and each base color signal uses 6-bit data, of which 18 bits are            odd data and 18 bits are even data, for a total of 36 bits of RGB data. Therefore, it is called a 36-bit or 36-bit LVDS interface. A single 8-bit LVDS output interface           In the interface circuit, a single channel is used for transmission, and each base color signal uses 8-bit data, a total of            24-bit RGB data, called 24-bit or 24-bit LVDS interface. Dual 8-bit LVDS output interfaces           In the interface circuit, it adopts dual-channel transmission, and each base color signal uses 8-bit data, of which the            odd road data is 24 bits, the even channel data is 24 bits, and a total of 48 bits of RGB data, which is called 48-bit or            48-bit LVDS interface.(3) Interface characteristics High Speed (655Mbps typical) Low voltage, low power consumption, low EMI (swing 350mv) Strong anti-interference ability and differential signal (4) Resolution Single: 1280*800@60fps Double way: 1920*1080@60fps 03 —  MIPI interface Zhanhui ZH070BH110-02A TFT LCD (7inch  800*1280 450nit IPS LCD 40pins MIPI) (1) MIPI definition       The MIPI Alliance defines a set of interface standards that standardize interfaces within mobile devices such as cameras, displays,        basebands, RF interfaces, etc., increasing design flexibility while reducing cost, design complexity, power consumption, and EMI.(2) MIPI characteristics High speed: 1Gbps/lane, 4Gbps throughput Low power consumption: 200mV differential swing and common-mode voltage Noise suppression Fewer pins, PCB layout is more convenient (3) Resolution        MIPI-DSI: 2048*1536@60fps(4) MIPI-DSI mode Command mode         MIPI-DBI-2, which corresponds to the parallel interface, has a frame buffer and flashes the DCS-based command set, similar to a CPU screen. Video mode         Corresponding to the parallel interface MIPI-DPI-2, the screen is based on timing control, similar to RGB synchronous screens 04 — HDMI interface Zhanhui ZH0121PH003-03A-TK2 A01 TFT LCD (12.1inch 1024*760 700nit  Equipped with HDMI board) (1) Interface definition High-Definition Multimedia Interface Digital interface for simultaneous transmission of video and audio Transmit uncompressed video data and compressed uncompressed digital audio data (2) Development history        In April 2002, seven companies, including Hitachi, Panasonic, Philips, Silicon lmage, sony, Thomson,         and Toshiba, formed an HDMI organization to develop new interfaces dedicated to digital video/audio transmission standards. (3) HDMI features Transition Minimized Differential Signa 8-bit~10-bit DC balanced coding, transmitting 10-bit data per clock cycle. EDID and DDCRealize that only devices can be connected Transfer Video and AudioLower cost and easier connection HDCPHigh-Bandwidth Digital Content Protection (4) HDMI interface type (Type A)HDMI A Type is the most widely used HDMI cable, with a total of 19 pins, a width of 13.9 mm, and a thickness of 4.45 mm. Most of the common tablets, TVs or video playback devices in daily life are equipped with this interface. (Type B)HDMI B Type is relatively rare in life. The interface is 29pin, and the width is 21 mm. The data transfer capacity of the HDMI B type is nearly twice as fast as the HDMI A type, which is equivalent to DVI Dual-Link. In daily life, most audio-visual equipment requires a working frequency of less than 165MHz, while the operating frequency of HDMI B type is above 270MHZ. (Type C)HDMI C Type, often referred to as Mini HDMI, is primarily designed for small electronic devices. HDMI C Type also uses 19pin, with a width of 10.42 mm and a thickness of only 2.4 mm, but it is nearly 1/3 smaller than HDMI A Tyoe, and is commonly used in portable devices, such as mobile phones, digital cameras, portable players and other devices. (Type D)HDMI D Type is commonly known as Micro HDMI. It adopts a double-row pin design, also 19pin, 6.4 mm wide, and 2.8 mm thick, which is very similar to the Mini USB interface and is suitable for portable and in-car devices. (Type E)HDMI E Type is mainly used for audio and video transmission in in-car entertainment systems. Because of the particularity of the application scenario, this type requires characteristics such as earthquake resistance, moisture resistance, high strength resistance, and large temperature difference tolerance range in design. In terms of physical structure, it adopts a mechanical locking design to ensure contact reliability.

In everyday lifeDisplays (LCDs) are everywhereThe picture we show through the screenLearn about the worldI love the rivers and mountainsSplendid ChinaStrange storiesEntertain and enrich your life Mom: Look less at your phone This can affect your vision*Open her phone* These large and small screensHow did you present the picture to us?What is the principle behind it?Today, a small exhibition will unveil the back of the screen(LCD) display principle and display timing 01 — Basic concepts   Zhanhui  ZH070BC079-01 TFT LCD (7.0inch 800*480 350nip TNLcd 50pins RGB) The common screen in life is called LCD (Liquid crystal display), which translates to liquid crystal display, that is, liquid crystal display. LCD display has the advantages of low  power consumption, small size, large amount of information and no eye damage, so it has become the mainstream electronic display device in life.The screen can display colors and pictures inseparable from a substance - liquid crystals. Liquid crystal is a special substance between solid and liquid, it is an organic compound,  which is in a liquid state under normal conditions. It is characterized by the same regularity  of molecular arrangement as solid crystals. When an electric field is applied to the liquid crystal  through the outside, it will change its molecular arrangement, which will change the propagation  of light, and the polarized light sheet has the effect of controlling the light transmittance, and then with a color filter, changing the voltage applied to the liquid crystal, it can change the amount  of light transmittance of a certain color. Through this principle, a display structure with controllable red (R), green (G) and blue (B) light output intensity can be made, and the three display structures can be formed into a display unit. By controlling the intensity of red, green, and blue, the unit can be mixed to output different colors, and by changing the ratio of the three colors, various colors can be mixed, and such a display unit is called a pixel. After having the LCD, the screen display is still black, because the LCD itself does not emit light, and a backlight is needed to provide a light source for the visible picture color to appear. The brightness of the screen, that is, the light goes through a series of processing processes  to the output, so the intensity of the output light is much lower than the intensity of the light source,  these processing processes will lead to a narrower display direction, which will affect the observation range of the naked eye, that is, its viewing angle is smaller, and the screen will not  be able to see its display content clearly from the side. It can be seen from this that behind  a small screen is the integration of countless science and technology, which is interlocked,  which has created the great development of film and television entertainment today. 02 — Basic parameters Next, Xiaozhan will tell you what meaning is behind the "nouns" introduced behind the screen.   Pixel Pixels are the most basic unit elements that make up an image, and the pixels of the display refer to the smallest points it imaging, which is composed of countless dots to form a pattern, and the more pixels there are, the more exquisite and beautiful the picture formed. Resolution The resolution of the screen is usually indicated by "row pixel value X column pixel value". For example, a resolution of 1920x1080 means that each row of the display has 1920 pixels, and each column has 1080 pixels, which can also be understood as having 1920 columns and 1080 rows.       Chromaticity Color depth refers to how many colors each pixel of the display can represent, usually expressed in bits.  Common display color depths are 16-bit and 24-bit.        Size   The size of the monitor is generally expressed in inches, such as 5 inches, 21 inches, 24 inches, etc.,  this length refers to the length of the diagonal of the screen. The smaller the size, the more science and technology it contains,  and the more complex the form structure, Zhanhui Optoelectronics can support ultra-small LCD display modules with a minimum size of 0.96 inches!      Click on it  The distance between two adjacent pixels will affect the delicacy of the picture quality and the viewing distance, and the screen of the same size, if the resolution is higher, the smaller the dot distance, the more delicate the picture quality.   Zhanhui ZH070BH018-08 TFT LCD     (7.0inch 1024*600 1000nit TNLcd 40pins LVDS) 03— Signal control   Now that you know the basic parameters, how does the screen work? RGB signal cable RGB cables usually have 8 cables each, so the RGB888 format is supported, with a total of 24 bits of cables,  each representing the red, green, and blue (RGB) color component of one pixel of the LCD screen. Synchronize the clock signal CLK The LCD screen uses synchronous communication with the outside world, usually using the CLK signal as the synchronization clock,  and each clock transmits one pixel data under the drive of the synchronous clock.  Horizontal synchronization signal HSYNC      The horizontal synchronization signal is used to indicate the end of the transmission of a line of pixel data on the LCD screen,  and every time the transmission of a line of pixel data on the LCD screen is completed, HSYNC will jump the level, such as a display with a resolution of 1920*1080, the level of HSYNC will jump 1080 times to transmit a frame of image!        VSYNC  VSYNC signal is used to indicate the end of the transmission of one pixel data on the LCD screen, and VSYNC will undergo a level jump every time the transmission of one frame of pixel data is completed. Among them, "frame" is the unit of image, a pair of images becomes a frame, in liquid crystal, a frame refers to a full screen liquid crystal pixels. For example, when the LCD screen runs at a rate of 60 per second, VSYNC level freezes 60 times per second and becomes 60 f0s, and the frame rate displayed on a good screen is in line with the blink frequency of the naked eye. Data enables signal DE   The data enabling signal DE is used to indicate the validity of the data, and when the DE signal line is high, the RGB signal line indicates that the data is valid.               Memory   Every pixel in the display is data, and in practical applications, the data of each pixel needs to be cached and transmitted to the LCD screen. Video memory can generally store at least one frame of display data of the LCD screen, such as an LCD screen with a resolution of 800x480, using the ob888 format display, a data size is 300x480x3 = 1152000 bytes, 3 means that a pixel occupies 3 bytes of data (R:8bit, G:8bit, B:8bit); If you use RGB565 format, the data size of a frame is: 2x800x480 = 768000 bytes, 2 means that a pixel occupies 2 bytes (R:5bt, G:6bt, B:5bit), so it can be seen that the higher the number of bytes occupied by a pixel, the richer the colors that can be represented! Zhanhui ZH070BH022-02 TFT LCD (7inch 1024*600 1000nit  IPS Lcd 40pins LVDS) 04 — LED and OLED In life, we often hear about LED and OLED screens, do you know what the difference is between them? It's not just a difference in letters. Zhanhui ZH070BH027-03  TFT LCD (7.0inch  800*1280 400nit IPS Lcd 31pins MIPI) The LED screen does not need a backlight, and a single pixel of the LED dot matrix color display contains threeLED lights: red, green, and blue, and by controlling the brightness of these three lights, the output of full color is realized, and multiple pixels constitute a whole screen. Since every pixel is the light emitted by LED lights, it is also particularly clear outdoors during the day! This also brings a disadvantage, due to the large size of LED lights, resulting in a very low screen pixel density, so it is generally only suitable for giant displays in squares. When we encounter a huge display screen in life, we can get closer and find many small LED lights on the screen. OLED (Organic Light Emiting Diode), on the other hand, uses an organic light-emitting diode with a pixel unit, so the pixel density is much higher than that of ordinary LED lattices, so the image quality is also more delicate. 0LED displays also do not need backlight, high contrast, thinness and lightness, viewing angle and response speed, etc., and the corresponding disadvantage is that their cost is rising. Today's science popularization ends here, I believe that everyone's understanding of the screen has reached a higher level, we will see you in the next issue!

Visual performance is the key factor to bring user experience, a good screen can bring users a great interactive experience, mobile phone as one of the commonly used electronic products in life, OLED mobile phone screen is more favored by major manufacturers and users, but there are still many users and manufacturers loyal to LCD screen. Today, by the small exhibition from the working principle of LCD and OLEDCompare the pros and cons of bothto uncover the story behind these two brothers 01 — LCD and OLED   LCD screen structure diagram The colors we see visually can be presented through the arrangement and combination of the three primary colors (R, red, G, green, B, blue). A pixel is the smallest unit that describes a digital screen  segmented image, and the resolution we are familiar with is determined by the number of pixels. Interestingly, the backlight layer of the LCD screen is not a single lamp bead under each pixel, but all pixels share a large backlight layer. So how do you present a colorful picture with a constant  number of pixels of three primary colors? When we apply voltage to the control board, it will form a loop through the liquid crystal layer  to connect the negative circuit to form a loop, which will drive the liquid crystal layer to deflect, which will make the three primary color brightness display cause different proportions to be presented, and mix to achieve the final desired color.   Polarizers work similarly to blinds Here we can understand it as a shutter in our lives. By controlling the deflection of the blades of the shutter to different degrees, the amount of light passing through the corresponding area becomes smaller, thereby reducing the brightness of a certain sub-pixel, which will make each pixel have different degrees of light transmission, so as to achieve the colorful picture we see.   OLED screen structure diagram As a descendant, OLED is not much different from LCD, the full name of OLED is organic self-emitting  diode, this "spontaneous" is the characteristic that distinguishes it from LCD screens. Each pixel of the OLED screen can be understood as an independently controlled lamp bead, and different colors can be displayed only by controlling the current injected into the light-emitting  material of the sub-pixels. Therefore, it is not necessary to turn on the entire backlight layer when you need to display it, as is the case with LCD screens, and only turn on the pixels that need to be displayed.   02 — OLED advantagesHow did OLED, as a younger generation, gradually become popular in daily life, and how did it gain the recognition and attention of manufacturers? Next, Xiaozhan will tell you what is special about OLED   Partial display The "autonomous" nature of the OLED screen allows each pixel to be turned on and off independently,  allowing the screen to display power, time, notifications or some other custom information with low power  consumption, which is unattainable by all pixels on the LCD screen sharing a large backlight layer.  It is often used in the fields of mobile phone screen off-screen display, hand-held display time, etc., and can achieve simple functions with a small amount of power, so as to achieve more interactive effects. Picture comparison Due to the "autonomous" nature of OLED, it will also be stronger than LCD in color and picture effect, and the reason for this is the contrast of the picture. Contrast is the ratio between the brightest whites and the darkest blacks in the light and dark areas of an image, and in most cases, the higher the contrast image, the more vivid and intense the colors will be. Let's take black and white, the two most contrasting colors, as an example, where the background is black or white, and the digital effect will be more pronounced than the rest of the colors.   When the LCD screen wants to display black, it needs to completely close the liquid crystal molecules of red, green and blue pixels, but in reality, we will find that the screen background is not black, but a kind of gray, this is because the liquid crystal molecules cannot be completely closed, and some of the white light emitted by the backlight layer will leak out. OLED only needs to cut off the power supply of pixels, so that it can not emit light at all, so as to display pure black in the true sense and achieve the ultimate high contrast, which can also make OLED show more color appearance.   Dynamic effects When we watch movies, we will find in outdoor theaters and indoor theaters that when the dynamic picture is switched, the outdoor theater LCD screen special effects switching will have a vague feeling of leaving an afterimage, this is because the picture switching, the pixels of the screen from one color to another It takes a certain amount of time, and this time is the so-called screen response time. If the response time is too long, the color of the pixels will not be switched in time when the dynamic picture is displayed, resulting in a chaotic and blurry experience caused by the overlap between the previous frame and the next frame. The color switching of the LCD screen is completed by the deflection of the liquid crystal molecules, so the deflection speed of the liquid crystal layer directly determines the response time of the LCD screen, and the deflection speed of the liquid crystal molecules will be greatly affected by the temperature, the lower the temperature, the slower the deflection, which is why the screen of the outdoor old theater will have a serious drag phenomenon. When the OLED screen is switched in color, there is no deflection of liquid crystal molecules, and it is less affected by the interference of external temperature, and the response time is often faster than that of LCD screen. ( Simple lines ) (Ultimate colors)   03— LCD Advantages:Having said so much about the advantages of OLEDSo are LCDs really useless? Service life The more delicate the parts, the more likely they are to have problems, and organic matter is more likely to age and change its properties than inorganic matter. OLED screen because of its "autonomous" characteristics, will make different areas of the screen use frequency, OLED screen each area of the aging speed will be different, when displaying solid color content, the aging degree of the deeper area will appear afterimage, this is what we commonly call "screen burning". For users, if there is a problem with even one area of the screen, then it is no different from all problems. The LCD screen because the light-emitting part is the entire backlight layer, so even if different areas of the screen are aged, the degree of aging is the same, although there will be an overall color difference, but there will be no disharmony of blue and purple. This is also LCD has been cultivated in industrial control, medical, marine and other precision fields, suitable for extreme environments durable and will not affect the effect of conveying information to make it durable.  Vision protection When we use the screen in daily life, reasonable adjustment of the brightness of the screen according to the ambient light will make our eyes more comfortable, so the manufacturer will carry out reasonable screen adjustment to make users get a better visual experience. There are two main ways to dim existing screens. DC dimming: The brightness of the screen is adjusted by changing the voltage or current that supplies power to the screen. PM dimming: Through the "on-off-on-on-off-off" this kind of light and dark constantly alternates, and the human eye has a visual lingering effect, about 1/16 of a second, the effect of the human eye will stay during this time, PWM is constantly dimming with this principle, and the frequency of PWM dimming refers to the speed of on-off. Differences between different dimming. (Usually not visible to the naked eye)There is no problem with LCD screen using DC dimming, while OLED screen due to its display principle, if DC dimming is used, the screen will display uneven colors when the brightness is low, which is what we call "rag screen". Therefore, most of the OLED screens on the market use PWM dimming, if the frequency of PWM dimming is low, the screen will produce strobe, causing visual damage, which is why many people are used to LCD screens, and when switching to use OLED screens, they will feel eye pain and tears, which is the saying of "blind screen". People are thriving  There are also IPS, TN, VA screens under the subdivision of LCD screens. Large-size screens commonly used in our lives, such as IPS, TN and VA on computers and TVs, all belong to LCD screens, and these three have developed their own tracks by adjusting the structure of the liquid crystal layer. (It's okay, we have a lot of people) TN can achieve fast deflection speed but poor color, and is often used in esports and electronic special effects displays, and the fast switching speed allows players to immediately capture the movement of the picture. VA can achieve high contrast but slow response, suitable for medium to large commercial screens, and can bring strong visual appeal and color performance. Although the IPS contrast is not as high as VA, the color is also good, the response time is between VA and TN, which is moderate, and the comprehensive experience and cost performance are the best.