Display Panel Sub-Zone Luminance Transition
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Solution Overview
Problem
Conventional display devices with high contrast struggle to maintain display quality, particularly in achieving progressive luminance changes between adjacent zones, leading to noticeable borders during side viewing due to significant luminance differences.
Innovation Solution
A display device configuration featuring a backlight module, a first display panel, and a second display panel with sub-zones of varying luminance, where the third sub-zone's luminance is intermediate between the first and second sub-zones, reducing luminance differences and minimizing border visibility during side viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance difference between adjacent zones is increased to improve contrast, then the contrast ratio is improved, but the border between zones becomes more obvious during side viewing
Solution Approach 1:
The second display panel is divided into multiple sub-zones (first sub-zone, second sub-zone, third sub-zone) with different luminance levels. The third sub-zone acts as an intermediate transition zone between the first and second sub-zones, creating a gradual luminance transition that reduces border visibility while maintaining overall contrast.
Solution Approach 2:
Different regions of the second display panel are assigned different luminance characteristics. The first sub-zone has higher luminance, the second sub-zone has lower luminance, and the third sub-zone has intermediate luminance, creating localized quality variations that achieve both contrast and smooth transitions.
2Device complexity
If a single luminance value is assigned to each zone for simplicity, then the device complexity is reduced, but the border between zones becomes more visible
Solution Approach 1:
Instead of using a single luminance value per zone, the patent segments each zone into multiple sub-zones with progressively varying luminance values. This segmentation approach maintains relatively simple control architecture while effectively reducing border visibility through gradual transitions.
Solution Approach 2:
The third sub-zone serves as an intermediary element between the first and second sub-zones, providing a intermediate luminance level that facilitates smooth transition. This intermediary approach reduces border obviousness without requiring complex continuous variation mechanisms.
Data Source
AI summary
A display device is disclosed, which includes: a backlight module; a first display panel disposed on the backlight module; and a second display panel disposed between the backlight module and the first display panel, wherein the second display panel includes a first zone and a second zone adjacent to the first zone, the first zone includes a first sub-zone, the second zone includes a second sub-zone and a third sub-zone, and the third sub-zone is disposed between the first sub-zone and the second sub-zone, wherein the first sub-zone has a first luminance, the second sub-zone has a second luminance, the third sub-zone has a third luminance, the first luminance, the second luminance and the third luminance are different, and the third luminance is between the first luminance and the second luminance.