Transparent Display Backlight Segmentation for Brightness
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Solution Overview
Problem
Conventional liquid crystal display devices with transparent capabilities suffer from lower backlight levels and poorer image quality due to the need to avoid blocking the backlight source, resulting in reduced brightness and contrast in transparent areas.
Innovation Solution
The implementation of a light modulation panel with a first backlight module and a second backlight module, where the second module includes a prism sheet and a collimated backlight source that supplements light to the transparent area, ensuring consistent brightness and image quality by deflecting light to enter the transparent area and compensate for blocked light from the first backlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the backlight source is disposed avoiding the transparent area to allow object visibility, then the transparent viewing function is improved, but the backlight level in the transparent area decreases resulting in poorer image quality
Solution Approach 1:
The backlight system is divided into two independent modules: a first backlight module that provides overall illumination and a second backlight module with a collimated light source that specifically targets the transparent area. This segmentation allows each module to perform its specialized function without interfering with the other, resolving the contradiction between transparent viewing and image quality.
Solution Approach 2:
The second backlight module with collimated light source is specifically designed to provide localized illumination to the transparent area. By concentrating light precisely where needed (in the transparent area) rather than uniformly across the entire display, the system maintains high brightness in the transparent region while preserving object visibility, thus improving both image quality and transparent viewing function.
2Ease of manufacture
If holes are formed in the light-guide plate to avoid blocking objects, then object visibility through transparent area is improved, but contrast in brightness deteriorates due to lower backlight levels
Solution Approach 1:
The collimated light source acts as an intermediary element that bridges the gap between the need for object visibility and the need for high brightness contrast. By introducing this specialized light source that emits light in a controlled direction, the system can illuminate the transparent area uniformly without requiring holes in the light-guide plate, thereby maintaining both object visibility and brightness contrast.
3Illumination intensity
If the backlight source is positioned to illuminate the entire display area, then image display quality is improved, but the transparent area cannot provide clear object viewing
Solution Approach 1:
The backlight system is divided into two independent modules: a first backlight module that provides overall illumination and a second backlight module with a collimated light source that specifically targets the transparent area. This segmentation allows each module to perform its specialized function without interfering with the other, resolving the contradiction between transparent viewing and image quality.
Solution Approach 2:
The system dynamically adjusts illumination by using two independently controllable backlight modules. The first backlight module can be optimized for overall image display quality, while the second backlight module with collimated light source can be specifically activated or adjusted for transparent area viewing, allowing the system to adapt to different viewing requirements.
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 enhances the brightness levels of the transparent area, maintains uniform image quality, and allows for clear visibility of objects through the display while displaying images, addressing the limitations of conventional transparent displays.
Implementation Method 1
the prism sheet deflects the light to form a second backlight entering the transparent area
Data Source
AI summary
An electronic device and a display device are provided. The electronic device includes the display device and an object to be shown. The display device includes a display panel, a first backlight module, and a second backlight module. The display panel has a transparent area corresponding to the object. The first backlight module is disposed with a gap to the display panel and generates first backlight to reach the display panel. The second backlight module has a prism sheet and a collimated illumination. The prism sheet is parallel to the display panel and corresponding to the transparent area, while the collimated illumination generates light reaching the prism sheet. The light is orientated by the prism sheet and becomes a second backlight before entering the transparent area.