Integrated Display Driver for Local Dimming Backlight Control
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Solution Overview
Problem
Existing display systems for liquid crystal display devices have complex wiring layouts due to the need for both an LED controller to drive LEDs in the backlight circuit and a display driver to drive the liquid crystal panel, leading to increased complexity and cost in the circuit structure.
Innovation Solution
Integrate the function of the LED controller into the display driver, allowing the display driver to simultaneously drive both the backlight circuit and the LCD panel, thereby reducing the need for separate LED drivers and simplifying the circuit layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate LED controller and display driver are used, then the display system can independently control backlight and panel, but the wiring layout becomes complex
Solution Approach 1:
The patent merges the LED controller and display driver into a single integrated display driver chip. This integration combines the functions of controlling both the LCD panel and backlight LEDs within one device, eliminating the need for separate LED controller and its associated wiring, thus reducing wiring layout complexity while maintaining independent control capability
Solution Approach 2:
The integrated display driver performs multiple functions: it drives the LCD panel pixels and controls the backlight LED segments simultaneously. This multi-functional design allows a single device to replace two separate controllers, simplifying the overall system architecture and reducing the number of connection wires required
2Ease of operation
If separate LED controller and display driver are used, then control functions are distributed, but the circuit structure becomes more complex and costly
Solution Approach 1:
The patent integrates the LED controller and display driver into a single chip, combining multiple control functions into one device. This reduces the number of separate components and their interconnections, simplifying the circuit structure and reducing overall system complexity while maintaining distributed control capabilities
3Reliability
If separate LED controller and display driver are used, then specialized control is achieved, but the number of components increases
Solution Approach 1:
The patent merges the LED controller and display driver into a single integrated chip, reducing the total number of components from two separate controllers to one unified device. This integration maintains specialized control functions while decreasing component quantity and simplifying assembly
Data Source
AI summary
A driving system, a display system, and a display device are disclosed. The driving system includes a timing controller and a plurality of display drivers; the timing controller is connected to the display drivers, respectively; each display driver includes a regional dimming signal generation unit and an LED driving control unit. After the timing controller transmits a first display data packet to each display driver, the regional dimming signal generation unit in each display driver generates a corresponding backlight brightness signal according to the first display data packet, and the LED driving control unit in each display driver generates a plurality of corresponding LED driving control signals according to the backlight brightness signal, so that the display driver can also drive a backlight circuit.