Backlight Assembly Light Guide Plate Grooves
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Solution Overview
Problem
The existing backlight assemblies for liquid crystal displays suffer from light loss due to light leakage and scattering into the tape used to secure the light guide plate, which reduces the efficiency of light incidence on the display panel.
Innovation Solution
The proposed backlight assembly incorporates a light guide plate with protruding light collimation units and guide grooves, where the tape is disposed in the grooves, and the collimation units have inclined parts that direct light towards the light guide plate, minimizing light loss by reducing the area where light can scatter into the tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a tape is used to secure the light guide plate to the circuit board, then the light guide plate is fixed in position, but light leaks into the tape and scatters, causing light loss
Solution Approach 1:
The invention divides the light guide plate into multiple sections with guide grooves created between them. These grooves segment the continuous tape structure into discrete sections, allowing light to be directed into the grooves rather than scattering into the tape. This segmentation resolves the contradiction by maintaining tape fixation while creating dedicated light pathways.
Solution Approach 2:
The guide grooves act as intermediary structures between the light guide plate and the tape. They provide a designated pathway that intercepts light before it can enter the tape, serving as a mediating element that prevents the harmful interaction between light and tape while preserving the tape's fixation function.
2Strength
If the tape area is increased to ensure proper fixation, then the light guide plate is more securely attached, but the area where light can scatter into the tape increases, worsening light loss
Solution Approach 1:
By creating guide grooves that segment the tape structure, the invention allows the tape to maintain adequate fixation strength through proper attachment points while preventing light from accessing large continuous areas of the tape. The segmentation creates multiple small contact zones rather than one large contact zone, reducing light scattering opportunities.
3Device complexity
If no guide grooves are provided, then the structure is simpler, but light scatters freely into the tape, causing significant light loss
Solution Approach 1:
The guide grooves are extracted as separate functional elements from the continuous tape structure. By removing material to create these grooves, the invention extracts the light-scattering problem from the system and redirects light into controlled pathways, significantly reducing light loss with minimal added 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 configuration enhances light incidence efficiency by directing more light onto the light guide plate and reducing the amount of light lost to the tape, thereby improving the overall brightness and clarity of the display.
Implementation Method 1
The at least one light collimation unit protrudes from an upper surface of the light guide plate and faces the at least one light source. The at least one light collimation unit includes a first side inclined part. The first side inclined part forms a first angle to a bottom surface of the at least one light collimation unit.
Data Source
AI summary
A backlight assembly is provided. The backlight assembly includes a light source, a light guide plate, a light collimation unit, and a guide groove. The light guide plate faces the light source in a first direction. The light guide plate includes a first surface on which light emitted from the light source is incident on and a second surface through which the incident light is emitted. The light collimation unit protrudes from an upper surface of the light guide plate and faces the light source. The guide groove is formed in a lower surface of the light guide plate along the first surface of the light guide plate.