Display Panel Brightness Uniformity via Local Aperture Adjustment
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Solution Overview
Problem
Current display technologies face challenges in achieving uniform screen brightness due to the low light transmission of gate driver on array (GOA) placement in active areas, leading to lower aperture ratios and non-uniform brightness across the display panel.
Innovation Solution
The solution involves a display panel design with a circuit layer, pixel layer, and liquid crystal layer, where the pixel layer is divided into first and second regions forming sub-pixels with varying light transmission abilities, and driving circuits are positioned to minimize brightness differences between areas with and without driving circuits, ensuring a predetermined range of brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If gate driver on array (GOA) is placed in active area to reduce non-display area, then frame width is reduced, but aperture ratio of pixels above driving circuits decreases leading to non-uniform brightness
Solution Approach 1:
The patent applies local quality by creating different pixel aperture ratios in different regions. Pixels above driving circuits have a larger aperture ratio than other pixels, compensating for the light blockage caused by the driving circuits. This is achieved by adjusting the pixel structure locally in the region above the driving circuits while maintaining uniform overall appearance.
Solution Approach 2:
The patent changes the aperture ratio parameter of pixels in the region above driving circuits. By increasing the aperture ratio of these specific pixels compared to other pixels, the brightness uniformity is improved despite the presence of driving circuits in the active area.
2Area of moving object
If driving circuits are placed in display area to reduce frame width, then screen real estate is improved, but light transmission ability of pixels above driving circuits decreases
Solution Approach 1:
The patent applies local quality by creating different pixel aperture ratios in different regions. Pixels above driving circuits have a larger aperture ratio than other pixels, compensating for the light blockage caused by the driving circuits. This is achieved by adjusting the pixel structure locally in the region above the driving circuits while maintaining uniform overall appearance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances brightness uniformity by optimizing the aperture ratios of sub-pixels and the positioning of driving circuits, resulting in a more consistent image brightness across the display panel.
Implementation Method 1
the liquid crystal layer comprises a plurality of liquid crystal molecules, wherein an ability of light to pass through the plurality of liquid crystal molecules over the first pixel portion is greater than an ability of light to pass through the plurality of liquid crystal molecules over the second pixel portion
Data Source
AI summary
A display panel and a display device are provided, and the display panel includes a circuit layer and a pixel layer disposed over the circuit layer. The pixel layer includes a first region used to form a first sub-pixel and a second region used to form a second sub-pixel. The ability of light to pass through the liquid crystal molecules over the first and second subpixels sequentially decreases. The circuit layer includes a driving circuit disposed opposite to the first region, and a difference between image brightness above the first region and image brightness of above the second region is within a predetermined range.