Display Panel Black Matrix Edge Extension for Light Leakage Prevention
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Solution Overview
Problem
Display panels with thin bezels are prone to light leakage from their side surfaces, which compromises user immersion and display quality.
Innovation Solution
A display panel structure featuring a color filter layer with a black matrix extending beyond the glass substrate edges, combined with a case design that includes a light shielding member and sealing member to absorb and redirect stray light, effectively preventing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the front sash is removed to achieve a thin bezel design, then the display apparatus has a sleek design and increased viewing immersion, but light leakage occurs in the edge area
Solution Approach 1:
The black matrix is extended from the planar dimension into the lateral dimension by making its side edges extend beyond the side edges of the first and second glass substrates. This three-dimensional extension creates an overlapping structure that blocks light leakage paths without increasing the front bezel thickness, thus resolving the contradiction between thin bezel design and light leakage prevention.
Solution Approach 2:
The black matrix, which normally serves only as a color filter and structural element, is repurposed to serve as a light shielding element by extending its side edges. This converts the potentially harmful light leakage into a beneficial feature where the black matrix actively blocks stray light, turning a structural component into a dual-function element that both filters color and prevents light leakage.
2Object-generated harmful factors
If the black matrix side edge extends beyond the glass substrate side edge, then light leakage is prevented, but the manufacturing precision requirement increases
Solution Approach 1:
The black matrix is formed to have side edges that extend beyond the glass substrate edges during the manufacturing process, before final assembly. This preliminary extension ensures that when the display panel is assembled with the case, the black matrix already occupies the correct position to block light leakage, eliminating the need for post-assembly adjustments and reducing the actual alignment precision requirements during manufacturing.
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 significantly reduces light leakage by using the black matrix and light shielding member to absorb and manage stray light, enhancing display panel performance and user immersion.
Implementation Method 1
A side edge of the black matrix may extend beyond a side edge of the first glass substrate in a second direction that is orthogonal to the first direction
Implementation Method 2
A light shielding member may be provided on an inner surface of the side wall area
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel may include a first glass substrate; a second glass substrate provided in front of the first glass substrate in a first direction; and a color filter layer provided between the second glass substrate and the first glass substrate in the first direction. The color filter layer may include a plurality of color filters and a black matrix surrounding the plurality of color filters. A side edge of the black matrix may extend beyond a side edge of the first glass substrate in a second direction that is orthogonal to the first direction. The display apparatus may include a backlight unit and the display panel.