TFT Substrate Black Matrix for Curved Panel Light Shielding
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Solution Overview
Problem
In curved TV panels, the bending of the substrate causes dislocation between the TFT and CF substrates, leading to light leakage and reduced light-shielding effect of the black matrix, which affects the contrast of the panel.
Innovation Solution
A method for manufacturing a TFT substrate involves forming a black matrix over the TFT structure and a pixel electrode, with an insulating protection layer, to ensure effective light shielding when the panel is bent, using a color resist layer with red, green, and blue materials and black resin for the black matrix, and electrically coupling the pixel electrode through the black matrix and insulating layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the panel is bent to provide curved TV experience, then the viewing experience and contrast are improved, but dislocation occurs between TFT and CF substrates causing light leakage
Solution Approach 1:
The invention extends the black matrix structure from a single-layer configuration to a multi-layer configuration by adding a second black matrix layer above the color filter substrate. This dimensional extension in the vertical direction provides enhanced light shielding capability that compensates for the dislocation issues caused by panel bending, effectively preventing light leakage while maintaining the curved panel's contrast performance.
Solution Approach 2:
The invention forms the second black matrix layer in advance during the manufacturing process, before the panel is assembled and potentially bent. This preliminary action ensures that the light-shielding structure is pre-configured to accommodate the expected dislocation that will occur during bending, preventing light leakage issues before they can manifest in the final product.
2Ease of manufacture
If a single-layer black matrix is used, then the manufacturing process is simple, but light leakage occurs when the panel is bent
Solution Approach 1:
The invention adds a vertical dimension to the black matrix structure by introducing a second layer above the color filter substrate. This multi-layer configuration enhances light shielding effectiveness to prevent light leakage during panel bending, while the manufacturing process remains relatively simple by using standard deposition and patterning techniques applied in sequence.
3Device complexity
If the black matrix is disposed only on the CF substrate, then the structure is simple, but the light-shielding effect is reduced when bent
Solution Approach 1:
The invention enhances the black matrix structure by adding a vertical dimension through a second black matrix layer positioned above the color filter substrate. This multi-layer arrangement provides superior light shielding effectiveness that maintains contrast performance even when the panel is bent, while the structural complexity remains manageable through systematic layer formation.
Solution Approach 2:
The invention creates a composite light-shielding structure by combining multiple black matrix layers with different positions and functions. The first black matrix layer is formed on the TFT substrate while the second black matrix layer is formed on the color filter substrate, creating a composite structure that provides enhanced and distributed light shielding capability throughout the panel thickness.
Data Source
AI summary
The present invention provides a TFT substrate and method for manufacturing the same. The method comprises the steps of: providing a substrate; forming a TFT structure above the substrate; further forming a color resist layer above the substrate, and forming a first opening area in the color resist layer at a location corresponding to the TFT structure; forming a first black matrix in the first opening area such that the TFT structure is covered by the first black matrix; and forming a pixel electrode above the color resist layer and the first black matrix, and the pixel electrode being electrically coupled to the TFT structure through the first black matrix. By applying the method described above, the present invention is sufficient to shield the light and reduce the light transmittance effect when the panel comprising the TFT substrate is bent, such that the contrast of the panel can be improved.