Edge-Lit Display Backlight With Integrated Diffusion Layers
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Solution Overview
Problem
Existing displays with edge-light methods face challenges in further reducing thickness and manufacturing costs.
Innovation Solution
Integrate a reflecting plate with a light guide plate using a dot pattern as a light scatterer, omit a diffuser plate, integrate band-shaped projections on the light-outputting surface with the light guide plate, and bond an optical sheet to a display panel with a fixing layer as a light diffuser, reducing the number of optical parts and their functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a light-emitting device with edge-light method is used, then thickness can be reduced, but further reduction in thickness and manufacturing costs is still desired
Solution Approach 1:
The dot pattern is integrated into the light guide plate structure, serving dual functions as both a bonding adhesive and a light scatterer. This merging eliminates the need for separate diffuser plates and reduces the total number of optical parts, thereby reducing thickness while maintaining functionality
Solution Approach 2:
The fixing layer is designed to perform multiple functions simultaneously: it bonds the optical sheet to the display panel and acts as a light diffuser. This multi-functionality reduces the need for separate components, reducing overall device thickness and simplifying the optical structure
2Reliability
If multiple separate optical parts (diffuser plate, prism sheet, diffuser sheet) are used, then optical functions are achieved, but manufacturing costs increase
Solution Approach 1:
Multiple optical functions (light scattering, light guiding, and bonding) are merged into the dot pattern structure within the light guide plate. This integration eliminates the need for separate diffuser plates and reduces assembly steps, thereby lowering manufacturing costs while maintaining optical performance
Solution Approach 2:
The fixing layer is designed as a multi-functional component that provides both mechanical bonding and optical diffusion. This eliminates the need for separate diffuser sheets and reduces the number of manufacturing steps, lowering production costs while ensuring reliable optical function
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 integration results in further reduction of thickness and manufacturing costs while maintaining luminance uniformity and efficiency.
Implementation Method 1
The dot pattern fixes the light guide plate and the reflecting plate to each other, and serves as a light scatterer
Implementation Method 2
a light-outputting surface including a plurality of band-shaped projections extending in a direction orthogonal to the light-entering end surface
Implementation Method 3
The fixing layer adheres or sticks the display panel and the optical sheet to each other, and serves as a light diffuser
Implementation Method 4
The reflecting plate is disposed to face the rear surface of the light guide plate
Data Source
AI summary
A display according to an embodiment of the disclosure includes a light-emitting device and a display panel unit. The light-emitting device includes a light guide plate, a light source, a reflecting plate, and a dot pattern. The light guide plate has a light-outputting surface including a plurality of band-shaped projections extending in a direction orthogonal to the light-entering end surface. The light source is disposed along the light-entering end surface. The reflecting plate is disposed to face the rear surface of the light guide plate. The dot pattern fixes the light guide plate and the reflecting plate to each other and serves as a light scatterer. The display panel unit includes a display panel, an optical sheet, and a fixing layer. The fixing layer adheres or sticks the display panel and the optical sheet to each other and serves as a light diffuser.