Liquid-Crystal Display Panel With Local Transmittance Optimization
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Solution Overview
Problem
Existing liquid-crystal display panels have transmittances that are generally around 6%, which is insufficient to support the requirement for an under-screen camera that needs a transmittance of at least 15%.
Innovation Solution
The liquid-crystal display panel is designed with a first region and a second region, where the transmittance of the first region is greater than that of the second region. This is achieved by configuring sub-pixels with different transmittances and areas, and adjusting the thickness of the color-resistance layer in specific sub-pixels to optimize transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the transmittance of the liquid-crystal display panel is increased to support under-screen camera (at least 15%), then the camera functionality is enabled, but the color gamut and imaging quality deteriorate
Solution Approach 1:
The display panel is divided into a first region with higher transmittance (≥15%) for under-screen camera and a second region with standard transmittance (4%-6%) for normal display. The color-resistance layer thickness is adjusted locally: thinner in the first region to increase transmittance, and thicker in the second region to maintain color gamut and imaging quality. This local differentiation resolves the contradiction by allowing high transmittance where needed while preserving display quality in other areas.
Solution Approach 2:
The thickness of the color-resistance layer is changed as a key parameter: reduced to 0.5μm-2μm in the first region to achieve ≥15% transmittance for camera functionality, while maintaining 2μm-5μm in the second region to preserve color gamut and imaging quality. This parameter change enables the panel to meet both the transmittance requirement for under-screen camera and the quality requirements for display.
2Illumination intensity
If the transmittance is uniformly increased across the entire panel, then the under-screen camera requirement is met, but the display quality in non-camera regions deteriorates
Solution Approach 1:
Rather than uniform transmittance increase, the patent applies local quality differentiation by creating two distinct regions with different transmittance characteristics. The first region (camera area) has transmittance ≥15% with thinner color-resistance layer, while the second region (display area) maintains 4%-6% transmittance with thicker color-resistance layer. This resolves the contradiction by allowing transmittance optimization locally without compromising overall display quality.
3Illumination intensity
If the area of high-transmittance sub-pixels is increased, then the overall panel transmittance increases, but the display resolution and color accuracy deteriorate
Solution Approach 1:
The patent segments the display panel into functionally distinct regions: a first region occupying 10%-30% of the total area for under-screen camera with high transmittance sub-pixels, and a second region for normal display with standard transmittance sub-pixels. This segmentation allows the high-transmittance sub-pixels to be concentrated in the camera region without compromising the resolution and color accuracy of the larger display area, resolving the contradiction between overall transmittance and display quality.
Data Source
AI summary
A liquid-crystal display panel includes a first region and a second region, and a transmittance of the first region is greater than a transmittance of the second region; the liquid-crystal display panel includes a plurality of sub-pixels; the plurality of sub-pixels include a first-color sub-pixel and a second-color sub-pixel, a transmittance of the first-color sub-pixel is greater than a transmittance of the second-color sub-pixel, and an area of the first-color sub-pixel is greater than an area of the second-color sub-pixel; and the plurality of sub-pixels further include a first-region sub-pixel and a second-region sub-pixel that have a same color, the first-region sub-pixel is located within the first region, the second-region sub-pixel is located within the second region, and a thickness of a color-resistance layer of the first-region sub-pixel is less than or equal to a thickness of a color-resistance layer of the second-region sub-pixel.