Liquid Crystal Display Subpixel Area Ratio for Color Cast Correction
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Solution Overview
Problem
In liquid crystal display panels, color cast occurs when viewed at an angle due to differences in gamma curves between central and squint viewing angles, leading to an inferior image display effect, and existing solutions increase production costs and charging/discharging times.
Innovation Solution
The liquid crystal display panel is designed with subpixels comprising two display regions of different areas, connected through a switching element and capacitors, allowing for differential gray scale voltages and reduced production costs and charging times by eliminating the need for additional switching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a subpixel is divided into two equal parts and driven with differential voltages to correct color cast, then color cast is alleviated, but a gate switch must be added increasing production cost
Solution Approach 1:
The subpixel is divided into two display regions with different areas (first display region and second display region), allowing differential gray scale voltage application without requiring additional gate switches. The area difference creates different capacitances that enable voltage differentiation through the same switching element.
Solution Approach 2:
The two display regions are designed with different local qualities (different areas), where the first display region has a larger area than the second display region. This local quality difference allows each region to respond differently to the same voltage signal, enabling gray scale differentiation and color cast correction without additional switching elements.
2Object-affected harmful factors
If a subpixel is divided into two equal parts and discharged through a second scan line to create voltage difference, then color cast is alleviated, but charging and discharging time increases
Solution Approach 1:
The discharge operation is extracted and eliminated from the driving process. Instead of charging both regions and then discharging one region through a second scan line, the invention directly applies different voltages to the two regions through the single switching element, removing the time-consuming discharge step while maintaining the voltage difference needed for color cast correction.
Solution Approach 2:
The voltage difference is established in advance through the area-based capacitance difference during the charging phase, rather than creating it through a separate discharge phase. The larger first display region naturally accumulates different charge than the smaller second display region when charged through the same switching element, preliminarily establishing the voltage difference needed for color cast correction.
3Device complexity
If display regions have different areas to generate different gray scale voltages, then production cost is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The invention changes the geometric parameter (area) of the display regions to create functional differentiation. By designing the first display region with a larger area than the second display region, the patent creates different capacitance values that enable gray scale differentiation. This parameter change approach simplifies the circuit structure while introducing a new manufacturing consideration for area precision.
Data Source
AI summary
A liquid crystal display panel and a liquid crystal display device are provided. The liquid crystal display panel has a plurality of scan lines, and a plurality of data lines, which coordinate with the scan lines to form a plurality of subpixel regions. Each subpixel region is provided with a subpixel, and each subpixel comprises a plurality of display regions, areas of the display regions being different from each other. When a scan signal transmitted through the scan line arrives, the display regions each receive a data signal transmitted through a same data line, so that the display regions have different gray scale voltages.