Liquid Crystal Display Narrow Frame Design via Light Guide Plate Slot
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display devices face challenges in achieving a narrow frame or no frame design due to the increased size of the plastic frame required to prevent light leakage and the complexity of the structure, which also increases manufacturing costs.
Innovation Solution
The design incorporates a concave slot on the light guide plate with an incline slope and an optical film, where the color filter substrate is supported by the incline slope and fixed using a light shading tape, allowing the plastic frame to be aligned with the array substrate edge, reducing the frame width and eliminating the need for a metal light shading layer, thus simplifying the structure and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a trench is provided on the plastic frame to enclose the display panel, then the display panel is prevented from sliding relatively, but the size of the plastic frame increases, which is not conducive to narrow frame or no frame design
Solution Approach 1:
The invention extracts the light blocking function from the plastic frame by introducing a dedicated light shading layer. This separates the structural support function (performed by the frame) from the optical control function (performed by the shading layer), allowing the frame to be minimized in size while still preventing light leakage.
Solution Approach 2:
The light shading layer serves multiple functions: it blocks light from entering the TFT area to maintain contrast ratio, provides a mounting surface for the array substrate, and enables narrow frame design. This multi-functional element replaces the need for an enlarged plastic frame with trench structures.
2Illumination intensity
If a metal light shading layer is provided below the TFT to block light emitted from the light guide plate, then the display contrast ratio is ensured, but the structure of the display panel becomes complicated, adding manufacturing processes and increasing production cost
Solution Approach 1:
The invention merges the light shading layer with the array substrate mounting structure. The light shading layer is integrated into the display panel assembly as a unified component rather than a separate added layer, simplifying the overall structure while maintaining the light blocking function necessary for contrast ratio.
3Device complexity
If the color filter substrate is positioned far away from the light guide plate, then the display panel structure is simplified, but light leakage occurs affecting display quality
Solution Approach 1:
The invention converts the potential harm of light leakage into a beneficial arrangement by precisely positioning the color filter substrate adjacent to the light guide plate. This close positioning, combined with the light shading layer, transforms the light path control into an advantage for display quality while preventing unwanted light from reaching the TFT area.
Data Source
AI summary
The present invention provides a liquid crystal display device. The device includes a light guide plate, a color filter substrate, an array substrate and a light shading tape. Wherein, a side wall of the concave slot is an incline slope, an edge of the color filter substrate is supported on the incline slope of the concave slot, an edge of a plastic frame is aligned with an edge of the array substrate, and a light shading tape for relatively fixing the color filter substrate and the light guide plate. The present invention can realize a narrow frame and no frame design of the liquid crystal display device. The structure of the display panel is simplified in order to simplify the manufacturing process and reduce the production cost.