Under-screen Camera Array Substrate with Porous Wiring
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Solution Overview
Problem
Existing OLED display devices with under-screen cameras have a large camera opening area, limiting the screen proportion due to an unavoidable black line at the edge of the opening.
Innovation Solution
An array substrate design featuring a base substrate with a camera area that includes a first blind hole and a wiring area with second blind holes, where the second blind holes are arranged between pixel openings and filled with transparent material to increase light transmittance and reduce the opaque area, allowing for a more efficient use of screen space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a camera module is placed under the screen with an opening in the display area, then the camera can be exposed to capture light, but a black line area appears at the edge of the opening which reduces the screen proportion
Solution Approach 1:
The patent applies the porous materials principle by introducing multiple second blind holes in the wiring area surrounding the first blind hole. These blind holes create a porous structure that allows light to pass through the wiring area that would otherwise be opaque, thereby reducing the black line area and increasing the effective screen proportion while maintaining camera functionality.
Solution Approach 2:
The patent applies local quality by differentiating the structure within the camera area. The first blind hole provides camera exposure, while the surrounding wiring area with second blind holes provides selective light transmission. This localized structural differentiation allows the wiring area to transition from completely opaque to partially transparent, reducing the black line effect without compromising signal line functionality.
2Device complexity
If the wiring area is made opaque to protect signal lines, then signal line arrangement is simplified, but the light transmittance is reduced and screen proportion is limited
Solution Approach 1:
The second blind holes create a porous structure in the wiring area that selectively allows light transmission while maintaining signal line protection. The blind holes are positioned and sized to permit light passage without exposing the underlying signal lines, thus achieving both light transmittance and signal line protection simultaneously.
Solution Approach 2:
The second blind holes act as intermediaries between the light and the signal lines. They allow light to pass through the wiring area while the signal lines remain concealed beneath the pixel definition layer and other protective layers, thus mediating between the conflicting requirements of light transmission and signal line protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design reduces the opaque area of the camera region, thereby increasing the screen proportion by enhancing light transmittance through the wiring area without affecting signal line arrangements.
Implementation Method 1
the second blind holes are arranged to avoid the signal lines for increasing a light transmittance of the wiring area
Data Source
AI summary
The present application provides an array substrate and a display device, including a thin film transistor layer, a planarization layer and a pixel definition layer prepared on a base substrate in turn. The base substrate disposes a camera area in a display area, and the camera area includes a first blinding hole and a wiring area. The first blind hole is used to expose a camera disposed on a back of the base substrate, and the wiring area disposes signal lines and second blind holes. The second blind holes are arranged to avoid the signal lines.