Array Substrate Refractive Index Gradient for Under-Display Camera
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Solution Overview
Problem
Current electronic devices have a low screen occupation ratio due to large upper and lower bezels, which hinders visual experience, and the integration of a camera under the screen poses challenges with light interference and diffraction from high pixel density wiring, disrupting imaging.
Innovation Solution
An array substrate and display panel design featuring a wiring layer and a non-wiring layer with a refractive index gradient, using a combination of film layers to reduce light interference and diffraction, and through holes to enhance light transmittance for better camera performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high pixel density wiring is used to increase display resolution, then display quality is improved, but light interference and diffraction increase, disrupting camera imaging
Solution Approach 1:
The patent introduces a light interference mitigation layer as an intermediary component between the wiring layer and the camera. This layer contains light-absorbing particles that act as a mediator to absorb and block interfering light before it reaches the camera, thereby resolving the contradiction between high display resolution and camera imaging quality
Solution Approach 2:
The patent converts the harmful light interference and diffraction caused by high-density wiring into a beneficial effect by using the light-absorbing particles to selectively absorb the interfering light while allowing display light to pass through. The harmful light that would disrupt camera imaging is transformed into absorbed energy, benefiting the overall system performance
2Area of stationary object
If camera is integrated under the screen to increase screen occupation ratio, then visual experience is improved, but light from wiring causes interference and diffraction, disrupting imaging quality
Solution Approach 1:
The light interference mitigation layer serves as an intermediary between the display structure and the camera, allowing the camera to be positioned under the screen while preventing wiring light from reaching the camera sensor. This enables high screen occupation ratio to be achieved without sacrificing imaging quality
Solution Approach 2:
The patent applies local quality by making the light interference mitigation layer selectively transparent - it allows display light to pass through to the camera for imaging, while blocking the specific wavelengths and angles of light that cause interference from the wiring. This localized optical filtering enables both functions to coexist
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 solution effectively minimizes light interference and diffraction, allowing for improved imaging quality and increased screen occupation ratio by reflecting or refracting light away from the camera, thereby enhancing visual experience.
Implementation Method 1
the light producing interference and diffraction is emitted from an optically dense medium region (such as the first film layer) to an optically sparse medium region (such as the second film layer), resulting in that the light with a larger incident angle is totally reflected
Implementation Method 2
even if the light with a smaller incident angle cannot be totally reflected, when the light with the smaller incident angle passes through this combined structure, a refraction angle will be increased
Data Source
AI summary
The present disclosure provides an array substrate and a display panel. The array substrate includes a wiring layer, and a non-wiring layer located on a bottom portion of the wiring layer. The non-wiring layer includes a first film layer and a second film layer, which are sequentially stacked in a direction away from the wiring layer. A refractive index of the second film layer is smaller than a refractive index of the first film layer.