Backlight Module Single Prism Sheet Brightness
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Solution Overview
Problem
Conventional electronic devices with display screens experience insufficient brightness when viewed at angles other than the normal direction, particularly when the screen is not adjustable, leading to suboptimal viewing conditions.
Innovation Solution
The electronic device incorporates a backlight module with only one prism sheet, which enhances brightness performance when viewed at non-front angles by optimizing light distribution, while reducing costs compared to traditional designs using two prism sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If two prism sheets are used in the backlight module, then the brightness at non-front viewing angles can be improved, but the manufacturing cost increases
Solution Approach 1:
The patent extracts and removes one prism sheet from the traditional dual-prism-sheet configuration, retaining only a single prism sheet in the backlight module. This extraction approach maintains sufficient brightness enhancement at non-front viewing angles while eliminating the cost and complexity associated with the second prism sheet, directly resolving the contradiction between brightness performance and manufacturing cost
2Illumination intensity
If the screen viewing angle is fixed at 0°, then the optical performance is optimal, but the user cannot adjust to different viewing preferences
Solution Approach 1:
The patent applies local quality by enhancing the light distribution characteristics in specific angular directions through the prism sheet design. The prism sheet is configured to redirect light rays at specific angles, creating localized brightness enhancement in non-front viewing directions while maintaining overall optical performance, thus allowing users to view the display comfortably at various angles without sacrificing image quality
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 a 45.6% increase in brightness at a 25° viewing angle, improving user experience and cost-effectiveness by maintaining high brightness without the need for dual prism sheets.
Implementation Method 1
The prism sheet is disposed between the light exit surface and the display panel... can exhibit a maximum brightness value in a direction which the light emission is not in normal direction
Data Source
AI summary
An electronic device with a display screen includes a first body and a first display screen. The first body has an operation surface, the operation surface has a first side and a second side opposite to the first side, and the first side is defined as a user side. The first display screen is disposed in the first body, and the operation surface exposes the first display screen. The first display screen includes a backlight module and a display panel. The backlight module includes a light guide plate, a light source, and has only one prism sheet. The light guide plate has a light incident surface and a light exit surface, and the light incident surface faces the second side. The light source is disposed between the light incident surface and the second side. The prism sheet is disposed between the light exit surface and the display panel.