Light-Emitting Display Substrate Openings for Infrared Sensitivity
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Solution Overview
Problem
Existing light emitting devices experience a decrease in infrared light receiving sensitivity due to the absorption of infrared light by the facing substrate, which affects the line-of-sight detection functionality.
Innovation Solution
The light emitting device incorporates a light-transmissive substrate with concave portions or openings over the infrared ray emitting and receiving elements, ensuring minimal absorption and maximizing infrared light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a facing substrate is arranged to cover the infrared light emitting element and light receiving element for protection, then the structural integrity and protection of the display substrate is improved, but the infrared light receiving sensitivity decreases due to light absorption by the substrate
Solution Approach 1:
The facing substrate is divided into multiple regions: a first region that covers the display element and a second region that has openings or concave portions at positions corresponding to the infrared light emitting element and light receiving element. This segmentation allows different parts of the substrate to serve different functions - protection for the display and transparency for infrared detection
Solution Approach 2:
The facing substrate exhibits different optical properties in different regions: the first region maintains full coverage for structural protection, while the second region has localized openings or concave portions that provide infrared light transmission paths. This local quality variation resolves the contradiction between overall protection and localized infrared sensitivity
2Area of stationary object
If the light-transmissive substrate covers the entire main surface for uniform protection, then the protective coverage is improved, but the infrared light transmission is reduced due to absorption in the overlap regions
Solution Approach 1:
The substrate coverage is segmented into a first region with full coverage and a second region with reduced coverage (openings or concave portions). This segmentation maintains broad protective coverage while creating specific transmission zones for infrared light
Solution Approach 2:
The substrate has non-uniform structure with different optical properties in different areas: the first region provides complete coverage and protection, while the second region has localized modifications (openings or concave portions) that minimize infrared absorption. This local quality differentiation resolves the contradiction between overall coverage and energy loss
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 effectively suppresses the decrease in infrared light receiving sensitivity, maintaining the line-of-sight detection function by enhancing infrared light transmission and reducing interference.
Implementation Method 1
a light-transmissive substrate arranged to cover the main surface, wherein in an orthogonal projection to the main surface, the light-transmissive substrate includes a first region that overlaps the display region and a second region that overlaps the peripheral region, and in each of overlap regions in the second region that overlap the infrared ray emitting element and the infrared ray receiving element in the orthogonal projection to the main surface, a concave portion thinner than the first region or an opening portion is provided
Data Source
AI summary
A light emitting device is provided. The device includes a display substrate having a main surface that includes a display region where a display element is arranged and a peripheral region where an infrared ray emitting element and an infrared ray receiving element are arranged, and a light-transmissive substrate arranged to cover the main surface. In an orthogonal projection to the main surface, the light-transmissive substrate includes a first region that overlaps the display region and a second region that overlaps the peripheral region, and in each of overlap regions in the second region that overlap the infrared ray emitting element and the infrared ray receiving element in the orthogonal projection to the main surface, a concave portion thinner than the first region or an opening portion is provided.