Under-Display Optical Area Voltage Layout for Brightness Uniformity
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Solution Overview
Problem
Existing display technologies fail to address the issue of brightness differences between optical and normal areas, where optical electronic devices are not present.
Innovation Solution
A display device with a display panel that includes a normal area and an optical area, featuring a first and second driving voltage line, where the second driving voltage line provides a higher voltage to the optical area to compensate for brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving voltage is applied to both normal area and optical area pixels, then the device structure is simple, but brightness uniformity deteriorates
Solution Approach 1:
The patent applies different driving voltages to different regions of the display panel. Specifically, the optical area pixels receive a first driving voltage while normal area pixels receive a second driving voltage, allowing each region to be optimized for its specific function and achieving brightness uniformity across the display
Solution Approach 2:
The display panel is divided into distinct regions (optical area and normal area) with separate voltage supply lines. This segmentation allows independent voltage control for each region, resolving the brightness uniformity issue without requiring a completely complex overall structure
2Manufacturing precision
If the number of pixels per unit area is increased in the normal area, then display resolution is improved, but brightness difference with optical area worsens
Solution Approach 1:
The patent changes the electrical parameter (driving voltage) to compensate for the physical parameter difference (pixel density). By applying a higher driving voltage to optical area pixels, the brightness output is adjusted to match the higher pixel density areas, achieving overall brightness uniformity
Data Source
AI summary
Disclosed is a display device including: a display panel including a display area comprising a normal area and an optical area, and a non-display area disposed around the display area, a substrate, and a first driving voltage line and a second driving voltage line on the substrate; and an optical electronic device disposed on the optical area, wherein the first driving voltage line provides a first driving voltage to a pixel of the normal area, and wherein the second driving voltage line provides a second driving voltage that is greater than the first driving voltage to a pixel of the optical area. Accordingly, the display device compensates for a difference in brightness between an optical area where an optical electronic device is arranged and a normal area where the optical electronic device is not arranged.