Array Substrate Slit Electrodes With Boundary Light Shielding
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Solution Overview
Problem
Liquid-crystal display panels, particularly ADS-type, face challenges in achieving optimal brightness and contrast due to irregularly shaped areas between slit electrodes, leading to reduced bright-state brightness and inadequate light shielding.
Innovation Solution
Incorporating a dark-area light shielding part over the slit electrodes, with its projection on the substrate covering the area between the first and second slit electrodes, to enhance brightness and contrast by blocking specific areas while maintaining dark-state brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the area between first and second slit electrodes is left uncovered, then the aperture ratio is improved, but the brightness uniformity deteriorates due to irregular light distribution in boundary areas
Solution Approach 1:
The patent applies local quality by introducing a dark-area light shielding part that selectively shields only the boundary areas between slit electrodes, while leaving the central transparent area uncovered. This localized shielding approach maintains high aperture ratio in the effective display area while improving brightness uniformity by preventing irregular light distribution in boundary regions.
2Illumination intensity
If a light shielding structure is added to cover boundary areas, then the brightness uniformity is improved, but the aperture ratio deteriorates due to reduced transparent area
Solution Approach 1:
The dark-area light shielding part is strategically positioned to cover only boundary areas where irregular light distribution occurs, while the central transparent area remains uncovered to maintain high aperture ratio. This localized approach ensures that light shielding is applied only where necessary for brightness uniformity without unnecessarily reducing the overall transparent area.
3Illumination intensity
If the width of dark-area light shielding part is increased to fully cover boundary areas, then the brightness uniformity is improved, but the transmittance deteriorates due to increased light blocking
Solution Approach 1:
The width of the dark-area light shielding part is precisely controlled to cover only the necessary boundary areas where irregular light distribution occurs. By limiting the shielding width to the minimum required for improving brightness uniformity, the patent minimizes light blocking in the central transparent area, thereby maintaining high transmittance while still achieving the desired brightness uniformity improvement.
Data Source
AI summary
An array base plate and a display panel. The array base plate includes a substrate and a plurality of sub-pixels that are provided on the substrate and are arranged in an array; each of the sub-pixels includes a first slit electrode (1) and a second slit electrode (2) that are arranged in a first direction the first slit electrode (1) includes a plurality of first slits (11) that are arranged parallelly and separately, and the second slit electrode (2) includes a plurality of second slits (21) that are arranged parallelly and separately, and a direction of extension of the first slits (11) and a direction of extension of the second slits (21) are different; and the sub-pixel further includes a dark-region light shielding part (6) located over the first slit electrode (1) and the second slit electrode (2).