Light Guide Plate Microstructures for Under-Screen Camera Display Modules
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Solution Overview
Problem
Current display technologies, such as LCDs, face challenges in achieving high display quality due to the need for ring-shaped lamp beads in the through-hole of the backlight unit, which complicates the structure and reduces compatibility with general LCD panels, leading to compromised image clarity and increased costs.
Innovation Solution
A display module design featuring a light guide plate with microstructures of varying sizes and densities in different regions, along with a reflective sheet and optical films, eliminates the need for a through-hole and ring-shaped lamp strips, enhancing light uniformity and image clarity by optimizing the arrangement of microstructures and openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If ring-shaped lamp beads are disposed in a camera area of a backlight unit, then light compensation can be achieved, but display quality is lowered and structure is complicated
Solution Approach 1:
The patent removes the ring-shaped lamp beads from the backlight unit structure. Instead of adding complex lighting components, the solution extracts the camera opening directly through the backlight unit, eliminating the need for separate compensation lamps and simplifying the overall structure while maintaining light compensation functionality.
Solution Approach 2:
The backlight unit is designed to serve multiple functions: it provides backlight illumination for the display and simultaneously creates an optical path for the under-screen camera. The camera opening region allows light to pass through for photoelectric conversion, making the backlight unit universally functional for both display and imaging purposes without requiring additional dedicated components.
2Illumination intensity
If ring-shaped lamp beads are used for light compensation, then illumination can be maintained, but image clarity is compromised
Solution Approach 1:
By removing the ring-shaped lamp beads entirely, the patent eliminates the source of image blur and halos. The extraction of this component prevents it from interfering with the camera's image capture quality, thereby maintaining both light compensation and image clarity.
Solution Approach 2:
The patent introduces a light guide plate with a camera opening region as an intermediary structure. This light guide plate manages light distribution uniformly across the display area while creating a clear optical path for the camera, acting as a mediator that balances illumination needs with image quality requirements without the interference of ring-shaped lamps.
3Adaptability or versatility
If a through-hole is formed in the backlight unit for the photosensitive element, then under-screen camera function is achieved, but additional components are required
Solution Approach 1:
The backlight unit is designed to perform dual functions: providing display backlight and enabling under-screen camera operation. The camera opening region in the light guide plate allows the backlight unit to serve as both an illumination source and an optical path for the photosensitive element, eliminating the need for separate structural modifications or additional components.
Solution Approach 2:
The patent merges the backlight unit structure with the camera opening requirement. The light guide plate is integrated with the camera opening region, combining the illumination function and the camera optical path function into a single unified structure, thereby reducing the total number of components needed.
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 improves image clarity and simplifies the display module structure by avoiding the need for ring-shaped lamp strips, ensuring better light guidance and uniformity, thus enhancing overall display quality and reducing costs.
Implementation Method 1
a light guide plate, including a first region corresponding to the photosensitive element and a second region adjacent to the first region
Implementation Method 2
a plurality of the microstructures are on a side of the light guide plate facing the photosensitive element
Data Source
AI summary
Provided are a display module and a display device. The display module includes a photosensitive element, a backlight unit, and a backlight. The backlight unit includes a first reflective sheet provided with a first opening corresponding to the photosensitive element, a light guide plate including a first region corresponding to the photosensitive element and a second region adjacent thereto, and an optical film provided with a second opening corresponding to the photosensitive element. A plurality of the microstructures are provided on a side of the light guide plate facing the photosensitive element. A distance between two adjacent columns of the microstructures in the first region is less than a distance between the two adjacent columns of the microstructures in the second region, or in a column of the microstructures, sizes of the microstructures in the first region are greater than sizes of the microstructures in the second region.