Optical Fiber Backlight for Hole-in-Display Dark Area
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Solution Overview
Problem
Display devices with camera holes in a hole-in-display type suffer from dark areas on the back side of the camera hole, reducing visibility and display quality due to blocked light from the LED light source.
Innovation Solution
Incorporating a backlight unit with a guide panel and optical fiber to redirect light to the dark-area generation region, or using a side reflective portion to reflect and condense light to the dark-area region, or controlling sub-pixel driving in the liquid crystal panel to improve light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a camera hole is provided in the backlight unit to enable hole-in-display type design, then the sense of immersion is enhanced and the non-screen region is reduced, but a dark area is generated on the back side of the camera hole corresponding to the opposite side where the light source is positioned
Solution Approach 1:
An optical fiber is introduced as an intermediary element to transfer light from the light source to the dark area generation region. The optical fiber receives light from the LED light source and emits it to the back side of the camera hole, effectively mediating the light transmission path to eliminate the dark area while maintaining the camera hole structure
Solution Approach 2:
The solution addresses the two-dimensional light distribution problem by introducing a three-dimensional light transmission path through the optical fiber. The optical fiber extends from the light source plane to the dark area region, creating a new spatial dimension for light delivery that bypasses the blocking effect of the camera hole
2Shape
If a camera hole is provided in the backlight unit, then the display achieves a simple shape with enhanced immersion, but the dark-area generation region reduces visibility and display quality
Solution Approach 1:
The optical fiber serves as a mediator that connects the light source to the dark area region, ensuring that visibility is maintained despite the camera hole's presence. This intermediary element allows the display to maintain its simple shape while preserving visual quality
3Illumination intensity
If a guide panel with optical fiber is added to illuminate the dark area, then the dark area is improved and visibility is enhanced, but the device complexity increases
Solution Approach 1:
The optical fiber within the guide panel serves multiple functions: it guides light from the light source, illuminates the dark area generation region, and maintains the structural integrity of the backlight unit. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
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
Enhances visibility and display quality by uniformly illuminating the dark areas, ensuring bright and uniform visibility even with a camera hole design.
Implementation Method 1
an optical fiber positioned inside the guide panel and for receiving the light from the light source to emit the light to the dark-area generation region
Implementation Method 2
a side reflective portion positioned on the back side of the camera hole corresponding to the opposite side where the light source is positioned in the backlight unit and for reflecting a part of the light entering both sides of the camera hole to condense the light to the dark-area generation region
Data Source
AI summary
A display device has a camera hole in a backlight unit constituting a display unit, the backlight unit has a dark-area improvement means by providing light to a dark-area generation region of the back side of the camera hole corresponding to the opposite side where a light source is positioned, thereby improving a dark-area region, and the dark-area improvement means includes an optical fiber. The present disclosure can improve the dark area in a hole-in-display type having the camera hole in the display unit, thereby enhancing the visibility.