Backlighting Module Light Guide Layout for Auxiliary-Angle Brightness
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Solution Overview
Problem
Display apparatuses in sharing mode suffer from poor display effects due to varying brightness levels based on viewing angles, making it difficult for multiple viewers to see the display clearly.
Innovation Solution
A backlight module with a first light guide plate positioned on the light-exiting side of a surface light source, where light is reflected without passing through additional film layers, reducing light loss and enhancing brightness in auxiliary viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light passes through multiple film layers in the backlight module, then the structure can be more complex and functional, but light loss increases and brightness decreases
Solution Approach 1:
The patent extracts and removes unnecessary film layers from the backlight module structure. By positioning the first light guide plate on the light-exiting side of the surface light source and eliminating intermediate film layers that cause light loss, the patent achieves reduced light loss while maintaining functional structure through strategic removal rather than simplification.
Solution Approach 2:
The patent repositions components in a different spatial arrangement - placing the first light guide plate on the light-exiting side rather than in intermediate positions. This dimensional reorganization allows light to exit directly after reflection from the first network, bypassing multiple film layers and reducing light loss without compromising structural functionality.
2Adaptability or versatility
If the display apparatus is in sharing mode with multiple viewers, then viewing angle needs to be large, but display brightness and effect deteriorate at auxiliary viewing angles
Solution Approach 1:
The patent applies different optical characteristics to different regions of the display. By using the first light guide plate with specific refractive properties and positioning it to work with the surface light source, the patent enhances brightness specifically in auxiliary viewing angle areas while maintaining overall sharing mode functionality. This localized optical optimization resolves the contradiction between wide viewing angle and maintained brightness.
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
Improves display brightness and effect in sharing mode by minimizing light loss, allowing clear viewing for multiple angles.
Implementation Method 1
light emitted by the first light source may exit from the backlight module only after being reflected by the first network
Data Source
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AI summary
A backlight module, including: a surface light source; a first light guide plate laminated with the surface light source in a thickness direction, wherein the first light guide plate is on a light-exiting side of the surface light source, and a side of the first light guide plate proximal to the surface light source comprises a plurality of first networks; and a first light source on a side surface of the first light guide plate, in which an orthographic projection of the first light source onto a plane, where a light-exiting surface of the surface light source is located, does not overlap with that of the first light guide plate onto the plane.