Microlens Display Screen Layout for Under-Screen Camera Light Capture
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Solution Overview
Problem
The camera module on the same side of the terminal device obstructs the achievement of a 100% screen-to-body ratio in full-screen devices, and existing under-screen camera modules struggle with insufficient light collection due to low light transmittance.
Innovation Solution
A microlens layer is integrated above the pixel layer in the display screen to converge light to gaps between pixels, enhancing light transmittance and allowing sufficient imaging light to reach the camera module, while maintaining the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the camera module is placed on the same side as the screen, then the camera function is achieved, but the screen-to-body ratio cannot reach 100%
Solution Approach 1:
The camera module is moved from the front surface (2D plane) to the back surface of the terminal device, utilizing the third dimension (depth) to resolve the spatial conflict between the camera and screen, thereby achieving both camera functionality and 100% screen-to-body ratio
Solution Approach 2:
The camera module is integrated into the back cover structure of the terminal device, with the camera lens positioned within a recessed area of the back cover, allowing the camera to be nested within the overall device structure without protruding and maintaining the front screen's full coverage
2Area of stationary object
If the camera module is placed below the screen, then the screen-to-body ratio is increased, but the light transmittance becomes insufficient
Solution Approach 1:
A light guide structure is pre-configured in the screen assembly before the camera module is positioned below it. This light guide structure includes light guiding columns that extend from the front surface toward the back surface,预先 directing light paths to ensure sufficient light reaches the camera module even when positioned below the screen
Solution Approach 2:
The light guide structure acts as an intermediary between the display screen and the camera module below it. The light guiding columns within this intermediary structure redirect and channel light from the display area down to the camera module, solving the light transmittance problem without requiring the camera to be on the front surface
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 microlens layer improves light transmittance, enabling the camera module to collect sufficient imaging light, thus realizing a full-screen design without compromising the screen-to-body ratio.
Implementation Method 1
the microlens layer corresponds to each gap between the pixels, and is used to converge the light to each gap before the light passes through the pixel layer via the gaps
Implementation Method 2
a refractive index of a material for forming a microlens layer is higher than that of a material for forming an encapsulation layer, thereby improving the light transmittance of the display screen
Data Source
AI summary
The present application relates to a terminal device and a display screen thereof, and a preparation method for the display screen, wherein the display screen includes a cover plate layer, a touch layer, a polarizing layer, an encapsulation layer, a pixel layer and a circuit driving layer from top to bottom. In particular, the display screen further includes a microlens layer formed above the pixel layer, wherein the microlens layer corresponds to each gap between pixels in the pixel layer, and is used to converge light to each of the gaps before the light passes through the pixel layer via the gaps so as to increase the light transmittance of the display screen.