Display Device Light Source Placement for Semiconductor Protection
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Solution Overview
Problem
In edge light display devices, semiconductor elements near light source devices can malfunction due to strong light, limiting the arrangement of light source devices and affecting brightness and uniformity.
Innovation Solution
A display device configuration with a first substrate, a second substrate, a liquid crystal layer, and semiconductor elements, where light source devices are arranged in the terminal portion to irradiate the substrate ends, and the liquid crystal layer modulates the light, preventing direct light exposure to semiconductor elements and allowing flexible light source device placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light source devices are arranged in terminal portions to increase brightness, then illumination intensity is improved, but semiconductor elements may malfunction due to strong light exposure
Solution Approach 1:
The display device is divided into distinct functional regions: a pixel portion for light display and terminal portions for light source arrangement. This segmentation allows light source devices to be positioned in terminal portions where they can illuminate the pixel portion without directly exposing semiconductor elements in the pixel portion to strong light, thus resolving the contradiction between brightness enhancement and semiconductor element reliability
Solution Approach 2:
The light-guiding plate acts as an intermediary medium that receives light from light source devices arranged in terminal portions and guides it to the pixel portion. This intermediary structure enables indirect illumination, allowing the pixel portion to receive sufficient light for high brightness while semiconductor elements remain protected from direct exposure to intense light sources
2Reliability
If light source devices are arranged away from semiconductor elements to prevent malfunction, then reliability is improved, but arrangement freedom of light source devices is limited
Solution Approach 1:
The substrate is segmented into pixel portions and terminal portions with distinct functions. Terminal portions are specifically designated for light source device arrangement, providing flexible positioning options without concern for semiconductor element damage, while pixel portions contain semiconductor elements protected from direct light exposure. This segmentation restores arrangement freedom to light source devices
Solution Approach 2:
The arrangement space for light source devices is extended from the limited area within pixel portions to include terminal portions at the edges of the display device. This dimensional expansion of available arrangement space provides multiple possible locations for light source devices, significantly increasing arrangement freedom while maintaining semiconductor element protection
3Stability of the object's composition
If multiple light source devices are provided on multiple sides of light-guiding plate to enhance brightness uniformity, then homogeneity is improved, but device complexity increases
Solution Approach 1:
The display device structure is segmented with dedicated terminal portions at edges specifically designed for light source device arrangement. This segmentation provides natural, predetermined locations for placing light source devices on multiple sides, making the implementation of multi-side illumination straightforward and reducing the complexity that would otherwise arise from finding suitable arrangement positions
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 configuration prevents semiconductor element malfunction, allows for symmetric and uniform light distribution, and enhances brightness and uniformity by ensuring light is primarily directed to the pixel area, while maintaining high freedom in light source device arrangement.
Implementation Method 1
light radiated from the light source device is propagated inside the light-guiding plate and is expanded in a plane manner
Implementation Method 2
a liquid crystal layer arranged between the first substrate and the second substrate, and a semiconductor element arranged on a side opposite to a side of the pixel portion across the first light source device
Data Source
AI summary
A display device according to one aspect of the present invention includes a first substrate including a pixel portion and a terminal portion, a second substrate arranged to face the pixel portion, a first light source device arranged in the terminal portion, and irradiating a first end surface of the second substrate with first light, a liquid crystal layer arranged between the first substrate and the second substrate, and a semiconductor element arranged on a side opposite to a side of the pixel portion across the first light source device, and electrically coupled with the terminal portion, wherein the first light is propagated while reflected between the first substrate and the second substrate, and the liquid crystal layer modulates the propagated first light.