Texture Recognition Device with Light Blocking Layer
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Solution Overview
Problem
Existing texture recognition devices in display apparatuses face challenges such as crosstalk between adjacent pixel units due to the micro-lens structure, and optical signal attenuation caused by air gaps and deformation during reliability tests.
Innovation Solution
The texture recognition device comprises a base substrate with a driving circuit layer, a photosensitive element layer, and a lens layer. Each pixel unit includes a pixel driving circuit, multiple photosensitive elements, and corresponding lens units, ensuring that each photosensitive element is accurately collimated by its respective lens unit, thereby reducing crosstalk and improving signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a micro-lens structure is used in the texture recognition device, then light focusing and signal transmission are improved, but crosstalk between adjacent pixel units occurs
Solution Approach 1:
A light blocking layer is introduced as an intermediary component between adjacent pixel units. This layer contains light blocking regions that prevent stray light from one pixel unit from reaching adjacent photosensitive elements, thereby eliminating crosstalk while preserving the light focusing function of the micro-lens structure
Solution Approach 2:
The light blocking layer is segmented into multiple light blocking regions, with each region corresponding to a specific pixel unit. This segmentation allows selective blocking of light paths between adjacent pixels while maintaining optical functionality within each pixel unit
2Ease of manufacture
If air gaps are present in the device structure, then manufacturing complexity is reduced, but optical signal attenuation occurs during reliability tests
Solution Approach 1:
The refractive index parameter of the medium between the lens layer and photosensitive element layer is changed from air (n≈1.0) to a filling layer material with higher refractive index (n>1.0). This parameter change reduces optical impedance mismatch and minimizes signal attenuation while maintaining device assembly simplicity
Solution Approach 2:
A composite structure is created by combining the lens layer, filling layer, and photosensitive element layer. The filling layer material is specifically selected to provide optimal optical coupling between the lens and photosensitive elements, reducing signal attenuation during reliability tests
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
This configuration enhances the texture recognition effect by minimizing crosstalk and signal attenuation, leading to improved recognition accuracy and speed, while also ensuring structural integrity and reliability.
Implementation Method 1
each photosensitive element is accurately collimated by its respective lens unit
Implementation Method 2
a plurality of photosensitive elements in the photosensitive element layer
Data Source
AI summary
A texture recognition device and a display apparatus are provided. The texture recognition device has a plurality of pixel units, and includes a base substrate, a driving circuit layer, a photosensitive element layer, and a lens layer. The driving circuit layer and the photosensitive element layer are on the base substrate, and the lens layer is on a side of the photosensitive element layer away from the base substrate; at least one pixel unit includes a pixel driving circuit in the driving circuit layer, a plurality of photosensitive elements in the photosensitive element layer and a plurality of lens units in the lens layer, the pixel driving circuit is electrically connected with the plurality of photosensitive elements, and in a direction perpendicular to a surface of the base substrate, the plurality of photosensitive elements are in one-to-one correspondence with and overlap with the plurality of lens units.