Liquid Crystal Display Sub-Pixel Aperture Area Optimization
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Solution Overview
Problem
Liquid crystal display devices face inefficiencies in power consumption due to uniform aperture areas in sub-pixels, which do not optimize wall plug efficiency and transmittance ratios, leading to suboptimal power usage.
Innovation Solution
Adjusting the aperture areas of red, green, and blue sub-pixels based on their respective wall plug efficiencies and transmittances to minimize total power consumption, with the aperture area of the sub-pixel with the lowest wall plug efficiency being greater than the others, optimizing the ratio of aperture areas to achieve better power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform aperture areas are used for all sub-pixels, then manufacturing is simplified, but power consumption efficiency deteriorates
Solution Approach 1:
The patent applies local quality by assigning different aperture areas to different sub-pixels (red, green, blue) based on their specific wall plug efficiencies and transmittance characteristics. Each sub-pixel's aperture is optimized independently rather than using a uniform size, allowing the system to account for local variations in optical properties and achieve better overall power efficiency.
2Use of energy by moving object
If aperture areas are optimized for power efficiency, then power consumption improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically adjusting the aperture area parameter for each sub-pixel based on measurable optical characteristics (wall plug efficiency and transmittance). This transforms the design from a fixed uniform configuration to an optimized variable configuration, where aperture sizes are tuned to specific performance requirements while maintaining manufacturability through defined optimization criteria.
3Device complexity
If sub-pixel aperture areas are equal, then device structure is simplified, but light usage efficiency deteriorates
Solution Approach 1:
The patent addresses light usage efficiency by making each sub-pixel's aperture area locally optimized according to its specific optical properties. Sub-pixels with lower wall plug efficiency or transmittance are given larger aperture areas to compensate for their inefficiencies, ensuring that each sub-pixel contributes equally to the overall display brightness and minimizing energy loss.
Data Source
AI summary
According to one embodiment, a liquid crystal display device includes a display panel including a red sub-pixel, a green sub-pixel and a blue sub-pixel and an illumination device including a red light-emitting element, a green light-emitting element and a blue light emitting element and irradiating a mixture of light emitted by the light emitting elements onto the display panel. Further, of the red sub-pixel, the green sub-pixel and the blue sub-pixel, an aperture area of a sub-pixel having a lowest wall plug efficiency of the light emitting element of a respective color is greater than aperture areas of the sub-pixels of other colors.