Backlight Module Staggered Elements Eliminate Hot Spots
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Solution Overview
Problem
High-directive backlight modules often suffer from a hot spot phenomenon and light leakage due to the strong light emission and light guide structure design.
Innovation Solution
The proposed backlight module incorporates a low-reflective element with staggered extended parts and a light-shielding element with staggered adhesive members, both positioned to alleviate the hot spot and light leakage issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate with a light guide structure (such as a V-cut structure) is used to achieve high directivity, then the light-emitting angle is effectively controlled, but a hot spot phenomenon occurs on the light incident side and light leakage problem arises
Solution Approach 1:
The patent applies local quality by placing low-reflective elements at specific locations (bottom surface and light-incident surface) where hot spots occur, and positioning light-shielding elements at the light-exiting surface where light leakage happens. This targeted approach modifies only the problematic areas rather than the entire light guide plate, effectively controlling hot spots and light leakage while preserving overall light distribution.
Solution Approach 2:
The patent introduces low-reflective elements and light-shielding elements as intermediary components between the light source and the display. These intermediaries modify the light path by absorbing or shielding light at critical points, thereby eliminating hot spots and preventing light leakage without disrupting the overall light guide function.
2Illumination intensity
If a light guide structure is designed to control light direction, then light-emitting angle is improved, but the structure complexity increases
Solution Approach 1:
The patent segments the light guide plate into multiple functional zones by adding separate low-reflective elements and light-shielding elements. Instead of designing a complex integrated structure, the solution divides the light control function into distinct components: the light guide structure for direction control, low-reflective elements for hot spot management, and light-shielding elements for leakage prevention. This modular approach simplifies the overall design while achieving multiple objectives.
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 effectively eliminates the hot spot phenomenon and light leakage, enhancing the backlight module's grade and picture performance while maintaining reliable light emission.
Implementation Method 1
The low-reflective element is located on the bottom surface of the light guide plate. The low-reflective element has a base part and a plurality of extended parts... The present invention adopts the low-reflective element and the light-shielding element and therefore can eliminate the hot spot phenomenon
Implementation Method 2
The light-shielding element is located between the circuit board and the light-exiting surface. The present invention adopts the low-reflective element and the light-shielding element and therefore can eliminate the hot spot phenomenon and the light leakage problem
Data Source
AI summary
A backlight module includes a light guide plate, a light source, a low-reflective element, and a light-shielding element. The light guide plate has a light-incident surface, a light-exiting surface, and a bottom surface. The light source includes a circuit board and light-emitting elements. The circuit board is located on the light-exiting surface. The light-emitting elements are disposed on the circuit board and spaced apart. Each light-emitting element has a light-emitting surface. The low-reflective element is located on the bottom surface of the light guide plate and has a base part and extended parts. The extended parts are spaced apart and staggered the light-emitting elements. The light-shielding element is located between the circuit board and the light-exiting surface and includes adhesive members connecting the light-shielding element with the light guide plate. The adhesive members are spaced apart and staggered with the light-emitting elements.