What is RGB Interface?

The RGB interface is an interface method for transmitting video signals. It is mainly used to transmit image information from one device to a display device, such as a monitor, TV, or projector. The name of the RGB interface comes from the three basic color signals it transmits: red, green, and blue. By combining these three colors, images of various colors can be displayed.

RGB and Display

In a TFT display, each pixel is composed of three independent RGB (red, green, blue) sub-pixels. To create full color, these sub-pixels are combined with the color filter and polarizing film of the LCD liquid crystal layer to control the amount of red, green and blue light, thereby reproducing up to 16 million color variations. The RGB interface of the LCD screen achieves rich color display by adjusting the input of the three channels of red, green and blue. Each channel represents the three colors of red, green and blue, covering almost all colors of human vision.

RGB model depends on the device

RGB is a device-dependent color model: different devices detect or reproduce a given RGB value differently, because different manufacturers use different color elements (such as phosphors or dyes) and their responses to individual red, green, and blue levels, and even the same device can behave differently at different times. Therefore, without color management, RGB values cannot define the same color across different devices.

The main purpose of the RGB color model is to perceive, represent, and display images in electronic systems such as televisions and computers, although it is also used in traditional photography and color lighting. Before the electronic age, the RGB color model already had a solid theoretical basis based on human perception of color.

Typical RGB input and output devices

Typical RGB input devices include color televisions and camcorders, image scanners, and digital cameras. Typical RGB output devices include televisions using various technologies (such as CRT, LCD, plasma, OLED, quantum dot, etc.), computer and mobile phone monitors, video projectors, multi-color LED displays, and large screen displays such as Jumbotron. On the other hand, color printers are not RGB devices, they are usually subtractive color devices using the CMYK color model.

Application of RGB color model

Common RGB color mode applications can display colors on cathode ray tubes (CRT), liquid crystal displays (LCD), plasma displays, organic light emitting diodes (OLED), televisions or monitors, computers, or large screens. All pixels are located above the screen and equipped with three RGB light strips, which are very small but bright. At a common viewing distance, the individual glowing balls are difficult to distinguish, but the eyes see pure colors. All pixels are distributed on the surface formed by shadow reflection to form a color image.

When making a digital image, all pixels are presented in the computer memory or on the interface hardware (as a graphics table) with binary values for the red, green and blue components. After performing the correction, we convert the resulting values to brightness or reduced brightness to correct the gamma correction to correct the nonlinearity to the minimum configuration, thus producing a preview of the brightness on the display.

In digital image processing, each pixel can be represented in computer memory or interface hardware (such as a graphics card) as a binary value for red, green, and blue components. If managed properly, these values are converted to intensities or voltages through gamma correction to correct for the nonlinearities inherent in some devices, thereby reproducing the expected intensity on the display.

RGB interface display

Hot Display has a complete range of products. The following are recommended products related to RGB interfaces for selection.

4.3 inch TFT LCD display module 800x480 dots wide temperature IPS full viewing angle sunlight readable RGB compatible industrial computer

▶ Model: TFT-H043A10SVIST6N40

▶ Type: TFT wide temperature display

▶ Display pixels: 800x480 dot matrix

▶ Dimensions (mm): 105.50x67.15x3.05

▶ Display inches: 4.3"

▶ Effective size (mm): 95.04x53.86

▶ Application: industrial computers, smart devices

▶ Viewing angle: IPS (U80/D80/L80/R80)

▶ Brightness: 600cd/m2

▶ Pin: FPC-40PIN

▶ Interface: 24-bit TTL RGB

▶ Special reminder: Anti-static ESD 8KV

▶ Working temperature: -40~80℃

▶ Power supply voltage: 3.3V

▶ Driver chip: ST7262

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7.0 inch TFT LCD display 800x480 dot matrix TTL interface wide viewing angle compatible with STM32 optional touch screen

▶ Model: TFT-H070A3SVTFT3N40

▶ Type: TFT display

▶ Display pixels: 800x480 dot matrix

▶ Dimensions (mm): 164.9x100.0x3.5

▶ Display inches: 7.0"

▶ Effective size (mm): 153.84x85.632

▶ Application: STM32/RK series

▶ Viewing angle: TN/Normally White

▶ Brightness: 350cd/m2

▶ Pin: FPC-40PIN

▶ Interface: 24-bit TTL

▶ Special reminder: Anti-static ESD 8KV

▶ Operating temperature: -20~70℃

▶ Power supply voltage: 3.3V

▶ Driver chip: EK9716BD4+EK73002AB2

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5.2-inch bar TFT LCD display module/IPS full viewing angle/416x1280 dot matrix/RGB interface/NV3049F/sunlight readable

▶ Model: TFT-H052A01ZAINV5N40

▶ Type: TFT bar

▶ Display pixels: 416x1280 Px

▶ Dimensions (mm): 43.55x131.28x2.10

▶ Display inches: 5.2"

▶ Effective size (mm): 40.75x125.38

▶ Application: STM32/RK series

▶ Viewing angle: IPS (U85/D85/L85/R85)

▶ Brightness: 500cd/m2

▶ Pin: FPC-40PIN

▶ Interface: RGB+SPI

▶ Special tips: Anti-static ESD 8KV

▶ Operating temperature: -20~70℃

▶ Power supply voltage: 3.3V

▶ Driver chip: NV3049F

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2.1 inch TFT LCD display IPSround capacitive touch screen 480×480 pixels ST7701S

▶ Model: TFT-H021A1HQIST4C40

▶ Type: TFT round

▶ Display pixels: 480x480 Px

▶ Dimensions (mm): 71.26x71.26x3.46

▶ Display inches: 2.1"

▶ Effective size (mm): 53.28x53.28

▶ Application: smart home appliances, sweeping robots

▶ Viewing angle: IPS full viewing angle

▶ Brightness: 450cd/M²

▶ Pin: FPC-40PIN

▶ Interface: RGB

▶ Special instructions: Anti-static ESD 8KV

▶ Operating temperature: -20~70℃

▶ Power supply voltage: 3.3V

▶ Driver chip: ST7701S

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7-inch TFT LCD display module //1024x600 resolution/wide temperature/IPS full viewing angle/

Visible in sunlight/optional capacitive touch/STM32/RK

▶ Model: HTM-H070A2-RGB-B06

▶ Type: TFT module with board

▶ Display pixels: 1024x600 Px

▶ Dimensions (mm): 186.90x108x8.3

▶ Display inches: 7.0"

▶ AA size (mm): 154.21x85.92

▶ Application: Industrial computer

▶ Viewing angle: IPS full viewing angle

▶ Backlight/brightness: 700cd/M2

▶ Pin: 40pin

▶ Interface mode: RGB

▶ Special instructions: Anti-static ESD 8KV

▶ Working temperature: -30~70℃

▶ Supply voltage: 5.5V

▶ Driver chip: T.B.D

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7” TFT LCD display module//1024x600 dot matrix/wide temperature/IPS full viewing angle/

Visible in sunlight/with capacitive touch/STM32/RK

▶ Model: HTM-H070A2-RGB-B06C

▶ Type: TFT module with board

▶ Display pixels: 1024x600 Px

▶ Dimensions (mm): 186.90x108x10.0

▶ Display inches: 7.0"

▶ AA size (mm): 154.21 x 85.92

▶ Application: Industrial computer/medical equipment

▶ Viewing angle: IPS full viewing angle

▶ Backlight/brightness: 500cd/M2

▶ Pins: 40pin

▶ Interface mode: RGB

▶ Special instructions: Anti-static ESD 8KV

▶ Operating temperature: -30~70℃

▶ Power supply voltage: 5.5V

▶ Driver chip: T.B.D

▶ Read more

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