Light-Emitting Module Layout for Black Border-Free Display Uniformity
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Solution Overview
Problem
Existing LED light strips used as backlight sources in display screens often result in uneven brightness due to the opaque adhesive dam, leading to a black border and compromised display quality.
Innovation Solution
A light-emitting module comprising a carrier circuit board with light-emitting chips, a light-blocking wall, and a light conversion medium layer that converts first color light into second color light, ensuring even brightness across the module, along with a decorative film for aesthetic and light-dispersion effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an opaque adhesive dam is used to surround the fluorescent adhesive, then the fluorescent adhesive is prevented from flowing out, but the brightness of the display screen corresponding to the adhesive dam becomes less than the rest part, causing a black border effect
Solution Approach 1:
The adhesive dam is designed to be transparent or translucent instead of opaque, allowing light to pass through. This color/transparency change enables the adhesive dam to contain the fluorescent adhesive while no longer blocking light, thereby eliminating the black border effect and maintaining brightness uniformity across the display screen.
Solution Approach 2:
The optical parameter of the adhesive dam is changed from opaque to transparent/translucent. This parameter change allows the adhesive dam to simultaneously fulfill its containment function and maintain light transmission, resolving the contradiction between adhesive containment and display brightness uniformity.
2Illumination intensity
If the light conversion medium layer exceeds the light-blocking wall, then the light-blocking wall is covered and brightness uniformity is improved, but the structural complexity increases
Solution Approach 1:
The light conversion medium layer is extended to cover the light-blocking wall, merging the light conversion function with the light blocking structure. This integration ensures that the entire visible surface, including the area over the light-blocking wall, emits uniform light, improving brightness uniformity while the structural complexity increase is minimized through functional integration.
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
The solution prevents black borders and enhances display panel brightness uniformity, improving visual experience by ensuring consistent light emission and aesthetic appeal.
Implementation Method 1
The light conversion medium layer covers the multiple light-emitting chips and part of the carrier circuit board in a space enclosed by the light-blocking wall, the light conversion medium layer is configured to convert the first color light emitted by the light-emitting chips into second color light
Data Source
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AI summary
Provided are a light-emitting module (1) and a method for manufacturing the same, a display panel (100), and an electronic device (1000). The light-emitting module (1) includes a carrier circuit board (10), a light-blocking wall (50), a light conversion medium layer (70), and multiple light-emitting chips (30). Each light-emitting chip is configured to emit first color light. The light-blocking wall surrounds the multiple light-emitting chips. The light conversion medium layer covers the light-emitting chips. The light conversion medium layer is configured to convert the first color light emitted by the light-emitting chips into second color light. One side of the light conversion medium layer away from the carrier circuit board exceeds one side of the light-blocking wall away from the carrier circuit board, and an edge of the light conversion medium layer exceeding the light-blocking wall covers a surface of the light-blocking wall away from the carrier circuit board.