Display Device Subpixel Merging for Aperture Ratio and Luminance
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Solution Overview
Problem
As display devices with increased resolution face challenges in maintaining a high aperture ratio due to the addition of sub-pixels for improved luminance, leading to increased power consumption and reduced visibility under external light, there is a need for a display unit that can produce a display output using four or more colors while enhancing the aperture ratio.
Innovation Solution
A display device comprising a display unit with pixels that include one first sub-pixel with the largest display region and two or more second sub-pixels with smaller display regions, where one of the second sub-pixels outputs a high luminance color, allowing for a combination of four or more colors with a reduced number of sub-pixels, thereby increasing the aperture ratio and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of sub-pixels is increased to achieve four or more colors for improved luminance, then luminance is improved, but the aperture ratio is reduced
Solution Approach 1:
The patent merges the functions of multiple sub-pixels by allowing one pixel to include only three sub-pixels (R, G, B) instead of four or more, while still achieving four-color display capability through shared sub-pixel usage across adjacent pixels. This combining approach maintains high aperture ratio while achieving improved luminance through coordinated operation of sub-pixels.
Solution Approach 2:
Each sub-pixel is designed to serve multiple functions: the same sub-pixel can contribute to different color outputs when combined with adjacent sub-pixels. For example, a green sub-pixel can contribute to both green display and yellow display (when combined with red), making each sub-pixel universally useful for multiple color combinations without requiring dedicated sub-pixels for each color.
2Illumination intensity
If the number of sub-pixels is increased to achieve four or more colors, then luminance is improved, but power consumption is increased
Solution Approach 1:
The patent combines the functionality of fewer sub-pixels to achieve four-color display capability, thereby reducing the total number of sub-pixels that need to be driven. This merging approach reduces power consumption while maintaining improved luminance through efficient use of each sub-pixel's output in multiple color combinations.
Solution Approach 2:
The patent uses partial action by not requiring all four color sub-pixels to be active simultaneously in every pixel. Instead, it strategically activates only the necessary three sub-pixels per pixel while relying on shared sub-pixels from adjacent pixels to provide the fourth color component, thereby reducing overall power consumption while achieving four-color display capability.
3Illumination intensity
If the number of sub-pixels is increased to achieve four or more colors, then luminance is improved, but visibility under external light is reduced
Solution Approach 1:
The patent merges sub-pixel functionality to achieve four-color capability with only three sub-pixels per pixel, thereby maintaining larger sub-pixel areas. This merging approach preserves visibility under external light by avoiding the aperture ratio reduction that would occur with four or more sub-pixels, while still achieving improved luminance through coordinated sub-pixel operation.
Solution Approach 2:
The patent applies local quality by optimizing the arrangement and size of individual sub-pixels within each pixel to maintain large aperture areas for good visibility under external light, while through coordinated operation of adjacent pixels, achieving four-color display capability with improved luminance. Each local pixel structure is optimized for visibility, while the global arrangement achieves enhanced luminance.
Data Source
AI summary
According to an aspect, a display device comprising a display unit that produces a display output corresponding to an input signal. The display unit combines the display output corresponding to each of four or more colors. The display unit includes a plurality of pixels each including three or more sub-pixels, the number of which is smaller than the number of colors. The pixel includes, as the sub-pixels, one first sub-pixel having largest display region among the sub-pixels and two or more second sub-pixels each having a display region smaller than that of the first sub-pixel. One of the second sub-pixels outputs a high luminance color having highest luminance among the four or more colors.