Infrared Sensor Integration in Display Panel Black Matrix
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Solution Overview
Problem
Driver monitor systems (DMSs) face reduced recognition efficiency due to decreased infrared light intensity when passing through a cover glass and display panel, leading to color deviation issues that prevent the infrared sensor from being hidden within an integrated black structure, affecting the imaging effect and integrated black structure of the display panel.
Innovation Solution
A display device with a display area and an infrared light-transmitting area, where the display panel includes a display functional layer and an infrared light-transmitting functional layer made of the same material, featuring stacked sub-color resist layers and varying black matrix densities to maintain an integrated black structure while enhancing infrared light transmittance and imaging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the color resist layer, black matrix, and spacer layer are removed above the infrared sensor to increase infrared light transmittance, then infrared light transmittance is improved, but color deviation occurs between the infrared sensor area and display area, affecting the integrated black structure
Solution Approach 1:
The patent applies local quality by differentiating the structure between the display area and infrared light transmitting area. In the infrared area, the color resist layer is removed to allow infrared transmission, while the display area retains its complete color resist layer for proper color display. This localized structural differentiation resolves the contradiction by allowing high infrared transmittance in the sensor area while maintaining the integrated black structure in the display area through selective layer removal.
2Shape
If the infrared sensor is hidden in an integrated black structure, then privacy protection and aesthetic appearance are improved, but infrared light intensity is decreased when passing through the cover glass and display panel, affecting recognition efficiency
Solution Approach 1:
The patent segments the display panel into two distinct functional areas: a display area with complete color resist layers for visual display, and an infrared light transmitting area above the sensor with removed color resist layers for infrared transmission. This segmentation allows the infrared sensor to remain hidden within the integrated black structure while establishing a dedicated pathway for infrared light to reach the sensor with minimal obstruction, thereby maintaining both privacy protection and sufficient infrared light intensity for recognition.
3Device complexity
If the infrared sensor is disposed below the display panel, then the display panel can be integrated with the sensor, but the sensor cannot be hidden affecting the integrated black structure
Solution Approach 1:
The patent extracts the color resist layer specifically from the infrared light transmitting area where the sensor is located, while retaining it in the display area. This selective extraction allows the infrared sensor to be hidden within the integrated black structure without compromising the overall integration. The sensor remains positioned below the display panel for integrated design, but the localized removal of the color resist layer enables the sensor to be concealed while maintaining the aesthetic integrated black appearance.
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 the integrated black structure and infrared imaging effect by maintaining consistent color reflection between the display and infrared light-transmitting areas, ensuring better infrared light transmittance and visual aesthetics while hiding the infrared sensor effectively.
Implementation Method 1
an infrared light-transmitting functional layer disposed in the infrared light-transmitting area, the display functional layer comprises a color resist layer disposed in the display area, and a material of the infrared light-transmitting functional layer and a material of the color resist layer are same
Implementation Method 2
a color resist layer disposed in the display area
Implementation Method 3
infrared light-transmitting functional layer... material of the infrared light-transmitting functional layer and a material of the color resist layer are same
Data Source
AI summary
A display device and a vehicle monitoring device are provided. The display device includes a display area and an infrared light-transmitting area adjacent to the display area. The display device includes a display panel, a backlight module, and an infrared sensor disposed on a side of the backlight module away from the display panel and corresponding to the infrared light-transmitting area. The display panel includes a display functional layer disposed in the display area. The display functional layer includes a color resist layer disposed in the display area.