Image Display Apparatus Backlight Light Shielding
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Solution Overview
Problem
Existing image display apparatuses with built-in cameras face challenges such as complex manufacturing processes, high costs, and structural complexity due to the need for intricate glass layer configurations and light shielding issues, leading to poor assemblability and increased thickness.
Innovation Solution
An image display apparatus design featuring a liquid crystal display panel with an imaging device positioned behind the panel, utilizing a tubular sleeve and an annular light shield made of elastic material to prevent backlight light entry, along with a shared power supply and infrared generation for improved image capture capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera is mounted at the back surface of the cover glass layer with an opening for light entry, then the camera can capture images, but light from the backlight device enters the camera causing image quality degradation
Solution Approach 1:
A light-shielding layer is introduced as an intermediary component between the backlight device and the camera. This layer selectively blocks light from reaching the camera while allowing the camera to capture images through the display surface, thereby eliminating backlight interference without compromising imaging functionality
Solution Approach 2:
The cover glass layer is segmented into multiple functional layers including a light-shielding layer and a camera mounting portion. The light-shielding layer is positioned at specific regions to block light paths to the camera, while the camera mounting portion provides structural support and light entry pathways, achieving both light blocking and image capture functions
2Device complexity
If the camera is disposed away from the image display region, then the display structure is simplified, but the camera cannot capture images through the display surface
Solution Approach 1:
The camera is positioned in a different spatial dimension (behind the display surface) rather than within the planar display region. The display surface acts as a multi-functional element that both displays images and serves as a light entry window for the camera, eliminating the need for separate camera openings while maintaining image capture capability
3Ease of manufacture
If a complex glass layer configuration with multiple openings and fit layers is used, then the camera can be mounted, but manufacturing complexity and cost increase
Solution Approach 1:
Multiple functional layers (cover glass, light-shielding layer, camera mounting structure) are merged into a single integrated component. The cover glass layer simultaneously provides structural protection, light shielding, and camera mounting functions, eliminating the need for separate fit layers and complex multi-layer configurations while simplifying manufacturing processes
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
This design simplifies manufacturing, reduces size and thickness, enhances light shielding, and enables effective image capture even with high-intensity backlights, while preventing display failures and allowing for infrared imaging.
Implementation Method 1
a light shield member, the light shield member having an annular shape, being disposed between the second surface of the liquid crystal display panel and an end surface of the sleeve, and being in contact with each of the second surface and the end surface
Data Source
AI summary
An image display apparatus includes a liquid crystal display panel including a display surface for displaying an image; an imaging device disposed face a back surface of the liquid crystal display panel, the back surface located opposite to the display surface, the imaging device being capable of imaging a front area of the liquid crystal display panel; and a backlight device which retains the imaging device in a location behind the back surface of the liquid crystal display panel, and applies light to the back surface of the liquid crystal display panel. The imaging device includes a sleeve including a cylindrical third sleeve which receives therein a lens, and an annular light shield member is mounted between the back surface and an end surface of the third sleeve and is in contact with each of the back surface and the end surface.