White Sub-Pixel Aperture Ratio Adjustment for Display Panel Efficiency
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Solution Overview
Problem
Conventional display panels with white sub-pixels often waste light transmittance as the white sub-pixel is switched off frequently, leading to inefficiencies in brightness and color gamut, particularly due to its equal effective aperture area with other sub-pixels.
Innovation Solution
The display panel design reduces the effective aperture area of the white sub-pixel while increasing its opening possibility, allowing for improved light transmittance and maintaining color gamut saturation by adjusting the aperture ratios of sub-pixels, thereby optimizing the pixel layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the white sub-pixel has the same effective aperture area as other sub-pixels, then the light transmittance is maximized when the white sub-pixel is on, but the overall backlight efficiency decreases because the white sub-pixel is switched off frequently (50%-70% of the time)
Solution Approach 1:
The patent changes the effective aperture area parameter of the white sub-pixel from being equal to other sub-pixels to being smaller (specifically 0.5-0.8 times the area of colored sub-pixels). This parameter change allows the white sub-pixel to be turned off more frequently without significantly impacting overall brightness, thereby improving backlight efficiency by reducing unnecessary backlight consumption during colored pixel display.
2Illumination intensity
If the white sub-pixel has a large effective aperture area, then the light transmittance is high when needed, but the color gamut saturation decreases and color shift increases
Solution Approach 1:
The patent optimizes the effective aperture area of the white sub-pixel to be 0.5-0.8 times that of colored sub-pixels. This parameter optimization achieves a balance where the white sub-pixel provides sufficient light transmittance when needed while minimizing its impact on color gamut saturation and reducing color shift, thereby resolving the contradiction between light transmittance and color accuracy.
3Device complexity
If the white sub-pixel occupies the same area as other sub-pixels, then the pixel layout is simple and uniform, but the overall display performance decreases due to wasted light transmittance
Solution Approach 1:
The patent modifies the effective aperture area parameter of the white sub-pixel to be smaller than colored sub-pixels (0.5-0.8 times the area). This parameter change improves light transmittance efficiency by allowing the white sub-pixel to be turned off during colored pixel display without significantly affecting overall brightness. The resulting non-uniform pixel layout is compensated by corresponding adjustments to colored sub-pixel areas, maintaining acceptable display performance.
Data Source
AI summary
A color film substrate, a display panel and a display panel are provided. The display panel comprises a plurality of pixels arranged in a matrix. Each of the plurality of pixels includes a first sub-pixel and a plurality of second pixels. The first sub-pixel has a white color, and the plurality of second pixels has a plurality of colors different from the white color. The first sub-pixel having the white color has a reduced effective aperture area compared with the plurality of sub-pixels having the plurality of colors different from the white color.