AMOLED Display Panel Light Filter Layout for Ambient Reflection Control
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Solution Overview
Problem
Current AMOLED display panels suffer from reduced contrast in bright environments due to ambient light reflection, which increases dark state brightness and decreases visibility.
Innovation Solution
Incorporating a color light filter with a diffusion film on the cathode surface of the AMOLED light-emitting board, where the diffusion film scatters ambient light at an angle greater than φ, where φ is determined by the width of the light filter components and the distance to the cathode surface, allowing reflection to a black matrix or differently colored filter components for absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple hole structure is used in the display panel, then the manufacturing process is simpler, but the display uniformity deteriorates due to stress concentration and light leakage
Solution Approach 1:
The hole structure is segmented into multiple layers with different shapes and sizes. The first hole layer has first holes and the second hole layer has second holes, creating a distributed stress relief pattern that prevents stress concentration while maintaining manufacturing simplicity
Solution Approach 2:
Different regions of the display panel have different hole configurations tailored to local stress and light leakage requirements. The first holes and second holes have different parameters (size, shape, depth) optimized for their specific locations, allowing precise control over stress distribution and light blocking in different areas
2Object-affected harmful factors
If the hole depth is increased to prevent light leakage, then light leakage is reduced, but stress concentration increases and manufacturing complexity increases
Solution Approach 1:
The light blocking function is segmented across multiple hole layers rather than relying on a single deep hole. The first hole layer and second hole layer work together to block light, allowing each layer to have moderate depth that relieves stress while collectively achieving effective light leakage prevention
Solution Approach 2:
The hole structure forms a composite configuration with different hole types (first holes and second holes) at different layers, creating a multi-functional structure that simultaneously addresses light blocking and stress relief requirements that a single uniform hole structure cannot satisfy
3Ease of manufacture
If a single hole layer is used, then the manufacturing process is simpler, but light leakage cannot be effectively prevented
Solution Approach 1:
The solution transitions from a single-layer hole structure to a multi-layer hole structure, adding the vertical dimension of layering. The first hole layer and second hole layer are positioned at different depths, creating a three-dimensional light blocking network that effectively prevents light leakage while maintaining reasonable manufacturing complexity
4Manufacturing precision
If stress relief holes are added to improve display uniformity, then display uniformity is improved, but the device structure becomes more complex
Solution Approach 1:
The hole structure serves multiple functions simultaneously: the first holes and second holes collectively provide both stress relief and light blocking functions. This multi-functionality reduces the need for separate structural elements, thereby limiting the increase in device complexity while achieving improved display uniformity
Data Source
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Figure 6~7(c)
AI summary
Embodiments of the present invention provide a display panel, a display panel production method, and a display apparatus, and relate to the field of optoelectronic technologies, to reduce reflection of ambient light incident on the display panel. The display panel includes an AMOLED light-emitting board and a light filter layer disposed on a cathode surface of the AMOLED light-emitting board. The light filter layer includes a color light filter and a diffusion film. The color light filter includes a red light filter component, a green light filter component, a blue light filter component, and a BM. The diffusion film is disposed on a surface of the color light filter, or is disposed on each light filter component in the color light filter. The diffusion film is configured to enable ambient light passing through the diffusion film to be incident on the cathode surface of the AMOLED light-emitting board in a direction that is not perpendicular to the cathode surface of the AMOLED light-emitting board, so that the ambient light is reflected by the cathode surface of the AMOLED light-emitting board to the BM or a light filter component that has a different color from a light filter component through which the ambient light passes.