Under-screen Camera Display Module Polarizer Light Leakage Prevention
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Solution Overview
Problem
The existing display module technologies face issues with light leakage due to poor accuracy in the first glue dispensing process for under-screen cameras, affecting the photographic effect by allowing leaked light to enter the viewing angle areas.
Innovation Solution
A display module design where the polarizer's boundary extends to the edge of the light transmission region, and a light-shielding portion is used to overlap the light non-transmission region, reducing the need for the first glue dispensing process and ensuring the glue adheres only to the backlight module and polarizer, thus preventing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first glue dispensing process is performed after the polarizer is adhered, then the polarizer can be fixed in position, but light leakage occurs due to poor accuracy
Solution Approach 1:
The patent removes the first glue dispensing process from the manufacturing sequence, extracting the problematic step that caused light leakage. By eliminating this intermediate gluing step and relying solely on the second glue dispensing process after backlight assembly, the solution removes the source of positioning errors and light leakage while maintaining polarizer fixation.
Solution Approach 2:
The patent performs preliminary positioning of the polarizer relative to the display panel without immediate gluing. The polarizer is positioned in advance with its opening boundary extending to the edge of the light transmission region, and this preliminary positioning is maintained through to the final assembly with the backlight module, avoiding the need for intermediate gluing that caused accuracy problems.
2Object-affected harmful factors
If the polarizer opening boundary is extended to the edge of the light transmission region, then light leakage is prevented, but the manufacturing precision requirement increases
Solution Approach 1:
The patent introduces the light-shielding portion as an intermediary element that extends from the polarizer opening boundary into the light non-transmission region. This intermediary structure acts as a buffer zone that prevents light leakage without requiring extremely tight alignment between the polarizer opening and the light transmission region edge, thereby reducing the manufacturing precision requirement.
Solution Approach 2:
The patent applies different functional zones to different regions: the polarizer opening boundary extends to the light transmission region edge for light control, while the light-shielding portion extends into the light non-transmission region to provide additional light blocking. This local differentiation of functions allows each region to contribute to light leakage prevention without requiring uniform high precision across the entire structure.
3Object-affected harmful factors
If the light-shielding portion extends into the light non-transmission region, then light leakage is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the light-shielding portion with the polarizer as a single integrated component rather than a separate element. The light-shielding portion is formed as part of the polarizer structure itself, extending from the opening boundary into the light non-transmission region. This merging reduces device complexity by eliminating the need for separate light-shielding components and simplifying the assembly process.
Data Source
AI summary
A display module and a glue dispensing method thereof are provided. The display module includes a display panel and a backlight module, and a polarizer is disposed between the display panel and the backlight module. The display module includes a blind hole for under-screen camera lighting in a display area, and the display panel includes a light transmission region and a light non-transmission region which are disposed corresponding to the blind hole. An aperture of the polarizer corresponding to the blind hole is reduced and blackened at an edge, thereby omitting the first glue dispensing process in the blind hole of the conventional structures.