Display Light Guide with Mirror and Diffusion Reflection for Uniform Brightness
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Solution Overview
Problem
Conventional display devices face challenges in achieving uniform brightness as they become thinner, leading to inconsistent display quality due to difficulties in efficiently guiding light to the display panel.
Innovation Solution
The implementation of a display device configuration that includes a light source, a mirror reflection guide member, and a diffusion reflection member, with specific patterns and arrangements to guide light efficiently, ensuring uniform brightness across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the display device is made thinner, then the device thickness is reduced, but the uniformity of brightness deteriorates
Solution Approach 1:
The light guide member is divided into multiple functional regions: a first light guide region with a first refractive index, a second light guide region with a second refractive index, and a third light guide region with a third refractive index. This segmentation allows each region to control light propagation differently, ensuring uniform brightness distribution even in thin display devices.
Solution Approach 2:
Different regions of the light guide member are assigned different refractive indices to optimize local light guidance characteristics. The first, second, and third light guide regions have progressively different refractive indices, creating local optical properties that collectively achieve uniform brightness across the entire display area while maintaining thin form factor.
2Device complexity
If a conventional light guide member is used, then the structure is simple, but the light distribution uniformity deteriorates
Solution Approach 1:
The light guide member is constructed as a composite structure with multiple regions having different refractive indices. This composite approach combines materials or structural configurations with varying optical properties to achieve superior light distribution uniformity while maintaining a relatively simple overall structure that can be integrated into the display device.
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 achieves improved uniform brightness and display quality by effectively distributing light, addressing the challenges of thinness and brightness inconsistency in slim display devices.
Implementation Method 1
The mirror reflection area is disposed adjacent to the light source and is configured to guide at least some of the light emitted from the light source to a second direction substantially perpendicular to the first direction
Implementation Method 2
The diffusion reflection area is spaced apart from the mirror reflection area in the second direction and is configured to guide at least some of the light emitted from light source to the display panel
Data Source
AI summary
A display device includes a light source, a mirror reflection guide member, a diffusion reflection member, and a display panel. The light source extends in a first direction and is configured to emit light. The mirror reflection guide member is configured to: support the light source, and guide at least some of the light to a second direction substantially perpendicular to the first direction. The mirror reflection guide member includes a plurality of guide patterns extending in the second direction and arranged in the first direction. The diffusion reflection member is configured to guide at least some of the light to a third direction substantially perpendicular to the first and second directions. The display panel is disposed on the mirror reflection guide member and the diffusion reflection member and is configured to display an image using the light guided by the diffusion reflection member.