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Display Modules - LCD, OLED, Graphic
  
T-55785GD070J-LW-AFN Application Field and Working Principle
  
The T-55785GD070J-LW-AFN is a 7-inch embedded LCD module comprising a LCD panel, a LED driver, and a controller board. This module is suitable for wide temperature range applications and the LED aspect ratio is the same as the LCD aspect ratio to make the display more uniform. It is a wide temperature, low power consumption LCD module with a maximum resolution of 800×480.
This kind of display features wide operating temperature range from -20°C to 70°C and low voltage operation from DC5V to DC24V, making the LCD suitable for both indoor and outdoor applications. It also provides excellent display performance with wide viewing angle and high contrast ratio. The backlight brightness is adjustable with a range of 0/10/100/255 backlight brightness settings.
  
Working Principle
The driving principle of this LCD module is very simple. When power is applied to the LCD, the voltage is applied to the LCD backlight to provide illumination. When voltage is applied to the liquid crystals between the two polarizers, they rotate and become aligned to the electric field that is applied to the LCD. This process changes the orientation of the light passing through the liquid crystals and alters the optical properties of the LCD. As a result, varying degrees of light transmittance occur and the desired image is displayed.
The module is controlled by the RA8876 Controller Board. It consists of aCPU such as the Renesas R8C microprocessor and runs on a proprietary RTOS (Real-Time Operating System). The Renesas R8C microprocessor controls all the operations of the LCD module and communicates with the host machine using a serial peripheral interface (SPI). The RTOS allows for real-time synchronization, smooth driving of the LCD, longer display life via backlight power regulation, and display performance optimization.
Due to its robust structure, wide temperature range operation, and excellent display performance, the module is suitable for both industrial and automotive applications. It can be used in applications such as security monitoring, audio/visual displays, GP systems, HMI displays, information displays, and other similar systems.
Conclusion
The T-55785GD070J-LW-AFN is an embedded LCD module featuring wide temperature range and low power consumption. Its wide viewing angle and high contrast ratio, as well as adjustable backlight brightness make it suitable for a wide range of applications such as security monitoring, audio/visual displays, GP systems, HMI displays, information displays, and other similar systems. The module is driven by the Renesas R8C microprocessor and executes commands from the host machine using a serial peripheral interface (SPI).

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