Splicing Screen Light Board Embedding for Seam Uniformity
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Solution Overview
Problem
Traditional LCD splicing screens suffer from non-uniform light-emitting wavelengths at splicing seams and display areas, leading to visible seams and unsightly appearances, especially when mini-LED light bars are used to achieve zero-seam splicing.
Innovation Solution
A splicing screen comprising at least two display panels and one light board, where the light board is positioned under the color filter substrate in both non-display and splicing areas, emitting white light with a spectrum similar to the display panel's backlight, allowing for seamless integration and uniform color filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If mini-LED light bar is used to cover the splicing seam, then the zero-seam splicing effect is achieved, but the light-emitting wavelength at the splicing seam becomes non-uniform
Solution Approach 1:
The patent changes the light-emitting parameters by using quantum dot materials with specific bandgap energies to convert blue LED light into precise red, green, and blue wavelengths. This parameter transformation ensures that the light-emitting wavelength at the splicing seam matches that of the display area, achieving wavelength uniformity while maintaining the zero-seam visual effect.
Solution Approach 2:
The patent applies different quantum dot materials with specific optical properties to different regions (splicing seam vs. display area). The quantum dot layer is selectively positioned to emit specific wavelengths only where needed, ensuring that the splicing seam area has the same color temperature and wavelength characteristics as the surrounding display area, thus achieving local quality uniformity.
2Manufacturing precision
If mini-LED light bar protrudes from the LCD to cover the splicing seam, then the splicing quality is improved, but the appearance becomes unsightly
Solution Approach 1:
The patent embeds the light board within the LCD structure, specifically positioning it in the non-display area and splicing area behind the color filter substrate. This nesting approach allows the light-emitting structure to be hidden within the display panel thickness, eliminating protrusion while maintaining the ability to illuminate and mask splicing seams effectively.
Solution Approach 2:
The patent relocates the light board from a front-facing position to a rear-positioned structure within the display panel. By changing the spatial dimension from protruding outward to being embedded in the background layer, the solution maintains splicing quality through optical illumination while achieving a smooth, flush appearance from the front viewing perspective.
3Quantity of substance
If LCD color filter is used to filter different band colors, then RGB colors are produced, but the wavelength unity with mini-LED light bar is difficult to achieve
Solution Approach 1:
The patent employs composite materials by combining blue LED chips with quantum dot materials having specific bandgap energies. This composite structure converts the blue LED light into precise red, green, and blue wavelengths through quantum confinement effects, achieving wavelength consistency between the light board and the LCD color filter system. The quantum dot layer acts as an intermediate material that bridges the wavelength mismatch between mini-LED and LCD RGB subpixels.
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 ensures a smooth, aesthetically pleasing splicing seam by matching the optical properties of the light board with the display panel, providing consistent light emission and improving the overall visual effect.
Implementation Method 1
The quantum dot layer is disposed on the blue LED layer so that the light board emits white light
Implementation Method 2
the color filter substrate covers the light board and is used for color filtering the light emitted by the light board
Data Source
AI summary
A splicing screen and a method of preparing the same are disclosed. The splicing screen includes at least two display panels and at least one light board. Wherein, each of the display panels includes a display area and a non-display area; and a splicing area is located between the non-display areas of any two adjacent display panels. Each of the display panels includes a TFT substrate and a color filter substrate. Wherein, the light board is disposed at a same layer as the TFT substrate, located under the color filter substrate, and located in the non-display area and the splicing area.