Color Filter Microlens Layout for Wide-Angle Display Pixels
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Solution Overview
Problem
Display devices with microlens structures face issues of cracking and discoloration during the color filter layer process, leading to a restricted viewing angle due to the microlens being configured between the color filter layer and the light-emitting element, increasing the distance between them.
Innovation Solution
The display device incorporates a first and second optical structure with refractive power and a non-plane light entrance and emitting surface for the color filter layer, allowing the color filter layer to be configured before the optical structure, thereby avoiding cracking and discoloration, and enhancing the viewing angle through light gathering and concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the microlens structure is configured before the color filter layer process, then the forward light output is improved, but the microlens structure experiences cracking and discoloration during manufacturing
Solution Approach 1:
The microlens structure is configured in advance on the lower substrate before the color filter layer is formed. This preliminary action allows the microlens to be positioned close to the light-emitting element (reducing the distance to less than 50 micrometers), thereby improving forward light output while avoiding the cracking and discoloration problems that occur when the microlens is configured later in the manufacturing process
2Ease of manufacture
If the microlens structure is configured between the color filter layer and the light-emitting element, then the manufacturing process is simplified, but the distance between the color filter layer and light-emitting element increases, resulting in restricted viewing angle
Solution Approach 1:
The microlens structure is preliminarily configured on the lower substrate before forming the color filter layer, enabling the microlens to be positioned very close to the light-emitting element. This preliminary positioning achieves both manufacturing simplicity and optimal viewing angle by minimizing the distance between optical components while maintaining structural integrity
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 provides a large viewing angle and good optical performance by preventing cracking and discoloration of the optical structure during manufacturing, while improving light output and reducing chromatic aberration and energy loss.
Implementation Method 1
The first optical structure has refractive power
Data Source
AI summary
A display device including multiple display pixels. Each display pixel includes a first display unit. The first display unit includes a first light-emitting element, a color conversion layer, a first color filter layer, and a first optical structure. The first light-emitting element is disposed on an inner surface of a lower substrate of the display device. The color conversion layer covers the first light-emitting element. The first color filter layer is disposed on an inner surface of an upper substrate of the display device. The first optical structure has refractive power. The first color filter layer is disposed between the upper substrate and the first optical structure. A light entrance surface and a light-emitting surface of the first color filter layer are not a plane.