Inclined Light Guide Plate Lateral Faces for Edge Bright Line Reduction
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Solution Overview
Problem
Conventional backlight sources in display apparatuses suffer from bright lines at the edges due to light emission from the lateral faces of the light guide plate, degrading the display effect.
Innovation Solution
The light guide plate's lateral faces are designed as inclined faces, matched with corresponding inclined faces of the adhesive frame, which refract and reflect light to prevent emission from the gap between the light guide plate and the adhesive frame, reducing edge bright lines and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light guide plate has vertical lateral faces, then the structure is simple and easy to manufacture, but light emitted from the lateral faces causes bright lines at the edges of the backlight source
Solution Approach 1:
The lateral faces of the light guide plate are designed with inclined surfaces rather than vertical faces, creating an asymmetric structure that redirects light emission away from the edge gap, thereby eliminating bright lines while maintaining manufacturing feasibility
Solution Approach 2:
The inclination angle of the lateral faces is optimized to redirect light paths, changing the geometric parameters of the light guide plate to prevent light from escaping through the gap between the light guide plate and adhesive frame
2Object-affected harmful factors
If the lateral faces are inclined to prevent light emission, then edge bright lines are reduced, but the structural complexity increases
Solution Approach 1:
Only the lateral faces of the light guide plate are modified with inclined surfaces, while other parts of the backlight source maintain their conventional simple structures, thereby reducing light emission locally without significantly increasing overall structural complexity
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 design significantly reduces or eliminates edge bright lines, enhancing the display effect by ensuring uniform light emission and preventing light concentration that could cause bright spots, thus improving the overall display performance.
Implementation Method 1
the lateral faces are inclined with respect to the bottom face, a projection of the at least one lateral faces with respect to the bottom face falling within the bottom face... faces of the adhesive frame which face towards the respective lateral faces are matched with the respective lateral faces
Implementation Method 2
there is another part of the light emitted from the lateral faces from the light guide plate. As illustrated in FIG. 1, the light emitted from the lateral face 14 of the light guide plate travels towards the adhesive frame 2, is reflected by the adhesive frame 2 and then exits from a gap between the light guide plate 1 and the adhesive frame 2
Data Source
AI summary
The present disclosure provides a backlight source and a display apparatus. The backlight source comprises: a light guide plate and an adhesive frame. The light guide plate comprises: a light incidence face, a light exit face connected to the light incidence face, a bottom face opposed to the light exit face, and at least one lateral faces configured to connect the light exit face to the bottom face and to be inclined with respect to the bottom face, a projection of the at least one lateral faces with respect to the bottom face falling within the bottom face. The adhesive frame is located at a periphery of the light guide plate, wherein faces of the adhesive frame which face towards the respective lateral faces are matched with the respective lateral faces.