Under-Display Texture Recognition via Dynamic Light Valve Control
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Solution Overview
Problem
Current fingerprint recognition technologies face challenges in designing optimized texture recognition devices for mobile terminals, particularly in integrating image sensors with display devices to enhance screen proportion and prevent residual images due to light interference.
Innovation Solution
A texture recognition device comprising a light source array, a light valve structure with a liquid crystal panel, and an image sensor array, where the light valve structure controls light transmission regions to form photosensitive light sources, allowing for effective texture image collection without affecting display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If image sensors are integrated with display devices to enhance screen proportion, then screen proportion is improved, but residual images occur due to light interference
Solution Approach 1:
The display panel is divided into pixel units with independent light emission control. Each pixel unit can be selectively activated to form photosensitive light sources at specific positions, preventing light interference between adjacent pixels and eliminating residual images while maintaining high screen proportion
Solution Approach 2:
The light emission state of pixel units is dynamically controlled based on recognition needs. The controller selectively activates pixel units to form photosensitive light sources only where needed, enabling adaptive light management that prevents residual images while maximizing screen utilization
2Measurement precision
If light valve structure controls light transmission regions to form photosensitive light sources, then texture recognition performance is improved, but device complexity increases
Solution Approach 1:
The pixel units of the display panel serve dual functions: normal display operation and formation of photosensitive light sources for texture recognition. This multi-functionality eliminates the need for separate dedicated light source components, improving recognition performance while avoiding additional device complexity
Solution Approach 2:
The light valve structure integrates the light emission function of the display panel with the light source function for texture recognition. By merging these functions into a single integrated system, the patent achieves improved recognition performance without adding separate complex light source subsystems
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 enables efficient texture recognition under the screen, improving screen proportion and reducing residual images by controlling light transmission regions, thus enhancing the performance of mobile terminal fingerprint recognition systems.
Implementation Method 1
the light valve structure is configured to control a first region to be in a light transmission state in response to a control signal, so as to allow light emitted from the light source array to pass through the first region in the light transmission state to form a first photosensitive light source
Implementation Method 2
the image sensor array is configured to receive light emitted from the light source array and then reflected to the image sensor array by a texture for a texture image collection
Implementation Method 3
the image sensor array is configured to receive light emitted from the light source array and then reflected to the image sensor array by a texture for a texture image collection
Data Source
AI summary
A texture recognition device and a manufacturing method of the texture recognition device, a color filter substrate and a manufacturing method of the color filter substrate are provided. The texture recognition device has a touch side, and includes: a light source array, a light valve structure and an image sensor array. The light valve structure includes a first substrate, a second substrate, and a light adjustment layer, and is configured to control a first region to be in a light transmission state in response to a control signal, so as to allow light emitted from the light source array to pass through the first region in the light transmission state to form a first photosensitive light source. The second substrate of the light valve structure is closer to the touch side than the first substrate, and the image sensor array is on the second substrate.