In-Screen Texture Acquisition on LCD Panels via Backlight Reflection
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Solution Overview
Problem
LCD display panels cannot achieve in-screen texture acquisition and recognition, such as fingerprint or palm print, and existing in-screen texture acquisition technologies for various display panels are costly and have different technical transformation schemes.
Innovation Solution
A texture acquisition device integrating a display panel with a backlight layer containing an array of light sources and photoelectric sensors, where light from the sources is reflected off an object to be detected and captured by photoelectric sensors to recognize the texture, enabling in-screen acquisition and recognition compatible with LCD technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LCD display panel is used for display, then light emission uniformity and working time are improved, but in-screen texture acquisition capability is lost
Solution Approach 1:
The patent merges the display function and texture acquisition function into a single LCD screen by integrating light sources, photoelectric sensors, and optical paths within the display panel structure. The display panel serves dual purposes: showing images through liquid crystal modulation and capturing textures through reflected light detection, eliminating the need for separate sensors and reducing device complexity
Solution Approach 2:
The LCD screen is designed to perform multiple functions simultaneously - it acts as both a display device for visual output and a texture acquisition device for biometric recognition. The same screen structure accommodates both light emission for display and light reflection detection for texture capture, making the device universal and versatile
2Adaptability or versatility
If existing in-screen texture acquisition technologies are applied to various display panels, then texture recognition is achieved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent uses homogeneous materials and processes throughout the manufacturing - the same LCD panel structure, same ITO transparent electrodes, same sealing methods - to achieve texture acquisition without requiring different materials or additional complex manufacturing steps. This maintains consistency across the production process and reduces manufacturing difficulty
Solution Approach 2:
The invention achieves texture acquisition by changing optical parameters within the existing display structure - adjusting light source positions, sensor arrangements, and optical path configurations - rather than changing the fundamental manufacturing process or materials, thereby keeping production costs low and processes simple
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
Enables convenient and low-cost in-screen acquisition and recognition of textures like fingerprints or palm prints on LCD display panels, reducing process costs and integrating with various display technologies.
Implementation Method 1
the light emitted by the light source is irradiated to a region between adjacent light sources after being reflected by an object to be detected on the display panel, to form an optical path
Implementation Method 2
at least one photoelectric sensor is provided in the optical path so as to detect the light reflected by the object to be detected to recognize an texture image of the object to be detected
Data Source
AI summary
Embodiments of the present disclosure provide a texture acquisition device, a method for manufacturing a texture acquisition device, and a texture acquisition method. The texture acquisition device includes: a display panel; a backlight layer including a plurality of light sources spaced apart from each other, the light sources being configured to emit light toward a light exit side of the display panel; and a plurality of photoelectric sensors, wherein the texture acquisition device is configured in such a way that the light emitted by the light source is irradiated to a region between adjacent light sources after being reflected by an object to be detected on the display panel, to form an optical path, and at least one photoelectric sensor is provided in the optical path so as to detect the light reflected by the object to be detected to recognize an texture image of the object to be detected.