Thin Display Module Light Guide Plate Wedge Design
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Solution Overview
Problem
There is a need for thinner and lighter display devices with improved brightness uniformity and luminance, while maintaining or enhancing functionality within limited space constraints.
Innovation Solution
A display module design incorporating a light guide plate with a wedge portion and a plate portion, where the light source module is positioned at the light incident surface, emitting light into the wedge portion, and the display panel is disposed on the light guide plate with a projection on the light-guiding inclined surface or plate portion, optimizing light transmission and exit for enhanced brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the display device is made thinner, then the thickness is reduced, but the brightness and luminance may be insufficient
Solution Approach 1:
The light guide plate is divided into two functional segments: a wedge portion for light coupling and guidance, and a plate portion for light exit. This segmentation allows each part to be optimized for its specific function, enabling efficient light transmission through a thinner overall structure while maintaining brightness.
Solution Approach 2:
The patent introduces an inclined surface at an angle to the horizontal direction, transforming the light guidance from a vertical path to a diagonal path. This dimensional change allows light to traverse the thickness more efficiently, enabling thinner display devices while maintaining adequate light output and brightness.
2Ease of manufacture
If the light guide plate structure is simplified, then the manufacturing is easier, but the brightness uniformity may deteriorate
Solution Approach 1:
Different portions of the light guide plate are given different geometries: the wedge portion has an inclined surface for light coupling, while the plate portion has a flat surface for uniform light exit. This local differentiation ensures that each region performs its function optimally, achieving brightness uniformity without excessive manufacturing complexity.
3Length of moving object
If the light guide plate is made thinner, then the display device is thinner, but the light guidance efficiency may be reduced
Solution Approach 1:
The wedge portion incorporates an inclined surface that creates a diagonal light path through the light guide plate. This angular geometry extends the effective light travel distance within the thinner plate, improving light coupling efficiency and reducing energy loss while maintaining reduced thickness.
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 allows for a thinner display module with improved brightness and reduced thickness, utilizing the light guide plate's inclined surface to efficiently guide and exit light, thereby providing sufficient brightness for thin-type display modules.
Implementation Method 1
the light guide plate has a light incident surface, a light-exiting surface, a light-guiding inclined surface... the light-guiding inclined surface is connected to the light incident surface and the light-exiting surface
Implementation Method 2
the light incident surface, the light-guiding inclined surface, and a portion of the bottom surface constitute a wedge portion while the light-exiting surface, the lateral surface, and other portions of the bottom surface constitute a plate portion
Data Source
AI summary
A display module including a backlight module and a display panel is provided. The backlight module includes a light guide plate and a light source module. The light guide plate has a light incident surface, a light-exiting surface, a light-guiding inclined surface, a bottom surface, and a lateral surface, wherein the light-guiding inclined surface is connected to the light incident surface and the light-exiting surface; the light incident surface, the light-guiding inclined surface, and a portion of the bottom surface constitute a wedge portion while the light-exiting surface, the lateral surface, and other portions of the bottom surface constitute a plate portion. The light source module is disposed at the light incident surface and emits light into the wedge portion. The display panel is disposed on the light guide plate and has a side. The side of the display panel has a projection disposed in the light-guiding inclined surface or the plate portion.