Pixel Opening Area Deformation for White Balance in Display Devices
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Solution Overview
Problem
High-definition liquid crystal display devices face challenges in securing pixel circuit arrangements and achieving white balance due to the deformation of pixels, which complicates the adjustment of area ratios for red, green, and blue pixels, leading to difficulties in maintaining effective display performance.
Innovation Solution
The display device features pixels with pixel circuit portions arranged at equal pitches, allowing for differential pixel opening areas by color, enabling effective display light transmission and white balance adjustment without compromising circuit layout design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pixel areas are varied to change the area ratio of R-pixel, G-pixel and B-pixel for white balance adjustment, then white balance can be adjusted efficiently, but it becomes difficult to secure arrangement area of pixel circuit portion in high-definition display devices
Solution Approach 1:
The pixel structure is segmented into distinct functional regions: pixel circuit portions (containing transistors and capacitors) and pixel opening portions (for light transmission). This segmentation allows the circuit portions to be arranged in a regular grid pattern while the opening portions can vary in area for white balance adjustment, resolving the contradiction between circuit arrangement and pixel area variation.
Solution Approach 2:
Different area ratios of pixel openings are applied locally to specific color pixels (R, G, B) based on their individual transmittance characteristics. The pixel circuit portions maintain uniform arrangement across all pixels, while only the opening areas are locally optimized for each color to achieve white balance, thus maintaining both circuit arrangement feasibility and color balance precision.
2Device complexity
If pixel circuit portions are arranged at equal pitches to simplify layout design, then manufacturing complexity is reduced, but flexibility in adjusting pixel area ratios for white balance is limited
Solution Approach 1:
The pixel structure is divided into circuit portions and opening portions. The circuit portions are arranged at equal pitches to simplify layout, while the opening portions are positioned within the pixel area and can vary in size independently. This segmentation allows uniform circuit arrangement coexisting with flexible pixel opening area adjustment for white balance optimization.
Solution Approach 2:
The solution moves the area adjustment flexibility from the circuit arrangement dimension to the opening area dimension. By keeping circuit portions at equal pitches (fixed dimension) and allowing opening areas to vary (variable dimension), the patent achieves both simplified layout design and flexible white balance adjustment through dimensional separation.
Data Source
AI summary
A display device includes: pixels corresponding to respective colors arranged in matrix, wherein each pixel has a pixel circuit portion in which a circuit for display driving of the pixel is arranged and a pixel opening to be an area obtaining effective display light, the pixel openings of the pixels corresponding to at least one color have an area different from areas of the pixel openings of pixels corresponding to other colors.