What interface does the LCD use for the display?

• 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 convenient
People are also spending more and more time on electronics
Videos and pictures are the medium of conveying information
A good screen is a carrier of information
What interface should be used to better light up and endurance?

Different screens adapt to different interfaces
Today, I will tell you about Xiaozhan
What are the interfaces of the LCD screen?

01

—

RGB interface

(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 frequency
Parallel 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

(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

(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

(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 DDC
  Realize that only devices can be connected
• Transfer Video and Audio
  Lower cost and easier connection
• HDCP
  High-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.