Matrix Backlight Driving System for Dynamic Image Brightness
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Solution Overview
Problem
Liquid crystal display devices suffer from inferior color and brightness due to inefficient light energy utilization in traditional backlight modules, which limits their dynamic image development compared to CRT televisions.
Innovation Solution
A driving system for a matrix type backlight module that includes a timing controller, row driver, and column driver to control the startup sequence and turning on time of multiple light spots, allowing for independent modulation and improved light energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional optical thin films and light guide panels are used to convert linear light source to planar light source, then the backlight module structure is established, but the light energy utilization rate is significantly reduced
Solution Approach 1:
The patent segments the backlight module into multiple independently controllable light spots arranged in a matrix pattern, replacing the traditional single linear light source and complex optical conversion system. Each light spot can be independently controlled through row and column driving signals, eliminating the need for multiple optical thin films and light guide panels while improving light energy utilization.
2Illumination intensity
If multiple optical layers are used to average the light source, then the planar light distribution is achieved, but the brightness and color saturation are significantly reduced
Solution Approach 1:
The patent divides the backlight into multiple discrete light spots that can be independently controlled in terms of timing and intensity. By selectively activating specific light spots in a matrix arrangement, the system achieves uniform light distribution without requiring multiple optical averaging layers, thereby maintaining high brightness and color saturation.
Solution Approach 2:
The patent implements dynamic control of each light spot through independent row and column driving signals, allowing the brightness and timing of each light spot to be adjusted dynamically. This dynamic modulation capability enables the system to achieve optimal light distribution and color performance without static optical layers that reduce brightness.
3Adaptability or versatility
If the entire backlight is turned on uniformly, then the light distribution is simple to control, but the dynamic image quality and local brightness adjustment are limited
Solution Approach 1:
The patent segments the backlight control into independent row and column channels, allowing specific regions (light spots) to be activated or deactivated independently. This segmentation enables local brightness adjustment and dynamic image quality enhancement without requiring complex overall control, as each light spot responds to simple row and column signal intersections.
Solution Approach 2:
The patent introduces row driving signals and column driving signals as intermediary control mechanisms. The interaction between these two signal types serves as a mediator to control the activation state of each light spot, providing a systematic and scalable approach to manage the complexity of multi-region backlight control.
Data Source
AI summary
A driving system for a matrix type backlight module having a plurality of light spots is provided. The driving system includes a timing controller providing a timing signal to control a starting up sequence and a turning on time for each of the plurality of light spots, a row driver electrically connected to the timing controller and providing a turning on time of the matrix type backlight module in a row direction according to the timing signal, and a column driver electrically connected to the timing controller and providing a turning on time of the matrix type backlight module in a column direction according to the timing signal.