Display Backlight Reflective Element for Infrared Camera Integration
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Solution Overview
Problem
Car display devices with integrated camera modules often have a dark hole in the display area, reducing visibility and display quality.
Innovation Solution
Incorporating a reflective element in the backlight module that allows infrared light to pass through while reflecting visible light, enabling the camera module to function as an infrared camera and preventing the dark hole in the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a camera module is integrated into the display area, then the display device can capture images, but a dark hole appears in the display area reducing visibility and display quality
Solution Approach 1:
The optical spectrum is segmented into visible light and infrared light bands. The reflective element selectively reflects visible light to maintain display visibility while transmitting infrared light to enable camera capture, effectively dividing the optical spectrum into functional segments that serve different purposes without interfering with each other
Solution Approach 2:
The reflective element is positioned specifically at the camera module location within the display area, providing localized infrared transmission capability only where needed for image capture, while the rest of the display area maintains full visible light transmission for normal display functionality
2Illumination intensity
If a reflective element is added to the backlight module, then the dark hole problem is solved, but the device structure becomes more complex
Solution Approach 1:
The reflective element is merged into the existing backlight module structure, combining the lighting function with the infrared reflection function in a single integrated component, thereby avoiding the need for separate structures and minimizing additional complexity
Solution Approach 2:
The reflective element serves multiple functions simultaneously: it reflects visible light to prevent dark holes in the display area, transmits infrared light to enable camera capture, and can be arranged to correspond with the lens assembly structure. This multi-functionality reduces the need for additional separate components
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 reflective element enhances design flexibility by allowing the camera module to be integrated into the display area without dark holes, improving visibility and display quality.
Implementation Method 1
a reflectance of the first reflective element for a visible band falls in a range of 35% to 95%
Implementation Method 2
a transmittance of the first reflective element for an infrared band is greater than 0%
Data Source
AI summary
A display device is provided, which includes a backlight module, a light modulation module, and a camera module. The light modulation module is configured to modulate light from the backlight module. The camera module includes a lens assembly. The backlight module is disposed between the camera module and the light modulation module, and includes a first reflective element. The first reflective element is arranged in accordance with the arrangement of the lens assembly. A reflectance of the first reflective element for the visible band ranges from 35% to 95%, and a transmittance of the first reflective element for the infrared band is greater than 0%.