Texture Recognition Pixel Layout for Light Collimation Accuracy
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Solution Overview
Problem
Traditional micro-lens structures in texture recognition devices are difficult to match with photosensitive elements, leading to ineffective light collimation and recognition issues due to uneven pixel driving circuits deforming the photosensitive element structure.
Innovation Solution
A texture recognition device with a base substrate, a driving circuit layer, a first electrode layer, and a photosensitive element layer, where the pixel driving circuit is electrically connected to the first electrode, and the photosensitive elements are spaced apart and connected to the pixel driving circuit through the first electrode, reducing the number of vias and facilitating flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional micro-lens structures are used for light collimation, then light collimation is attempted, but the micro-lens structure is difficult to match with photosensitive elements leading to ineffective light collimation
Solution Approach 1:
The patent removes the traditional micro-lens structure entirely and replaces it with a planar electrode-array-based light collimation system. The first electrode layer with multiple electrodes replaces the three-dimensional micro-lens structure, achieving light collimation through electrical field control rather than optical refraction, thus eliminating the matching complexity between micro-lenses and photosensitive elements.
Solution Approach 2:
The patent substitutes the mechanical/optical micro-lens system with an electrical field-based system. Instead of using physical micro-lens structures to refract and collimate light, the invention uses electrodes to generate electrical fields that control light propagation, replacing a mechanical/optical system with an electrical system that is easier to integrate with photosensitive elements.
2Area of stationary object
If pixel driving circuits are integrated under photosensitive elements to reduce device area, then area is reduced, but the uneven pixel driving circuits deform the photosensitive element structure
Solution Approach 1:
The patent segments the device into distinct functional layers: the driving circuit layer and the photosensitive element layer are separated by an interlayer insulation layer. This segmentation allows each layer to be optimized independently - the driving circuits can be unevenly distributed to reduce area while the photosensitive elements maintain their structural integrity on the separate layer, eliminating the deformation problem.
Solution Approach 2:
The patent moves the photosensitive elements to a different dimensional plane (upper layer) relative to the driving circuits (lower layer). By utilizing the vertical dimension through multi-layer construction with interlayer insulation, the patent resolves the conflict between area reduction and structural accuracy, allowing compact circuit layout without compromising photosensitive element geometry.
3Reliability
If multiple vias are used to connect photosensitive elements to pixel driving circuits, then electrical connection is achieved, but the number of vias increases device complexity
Solution Approach 1:
The patent merges multiple via connections into a single via per pixel unit. Instead of requiring separate vias for each photosensitive element connection, the design consolidates the electrical connections through one via that penetrates the interlayer insulation layer, reducing via count and device complexity while maintaining reliable electrical connection between the driving circuit and photosensitive elements.
4Measurement precision
If photosensitive elements are closely spaced to increase pixel density, then recognition resolution is improved, but signal crosstalk between adjacent elements increases
Solution Approach 1:
The patent applies local quality by giving each photosensitive element its own dedicated electrode and via connection, creating electrically isolated measurement zones. This localized electrical connection structure allows closely spaced photosensitive elements to maintain high recognition resolution while preventing signal crosstalk through independent electrical pathways for each element.
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 improves light collimation and utilization, enhances the recognition effect, and prevents signal crosstalk by ensuring the structural accuracy of photosensitive elements and optimizing the electrical connection between the pixel driving circuit and photosensitive elements.
Implementation Method 1
a plurality of photosensitive elements spaced apart from each other in the photosensitive element layer, the pixel driving circuit is electrically connected with the first electrode, the plurality of photosensitive elements are on a side of the first electrode away from the base substrate, and are electrically connected with the pixel driving circuit through the first electrode
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 first electrode layer and a photosensitive element layer; at least one of the plurality of pixel units includes a pixel driving circuit in the driving circuit layer, a first electrode in the first electrode layer, and a plurality of photosensitive elements spaced apart from each other in the photosensitive element layer, the pixel driving circuit is electrically connected with the first electrode, the plurality of photosensitive elements are on a side of the first electrode away from the base substrate, and are electrically connected to the pixel driving circuit through the first electrode.