Integrated Touch Display Panel UV Shielding and Brightness Uniformity
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Solution Overview
Problem
Integrated touch display panels face issues with ultraviolet irradiation affecting semiconductor thin film transistors in gate drive circuits, leading to differences in output characteristics and display brightness between odd and even rows of pixels, causing horizontal fringes and deteriorated display effects.
Innovation Solution
The implementation of a pseudo dual-domain pixel structure with cascade-connected shift register units and symmetrical strip-shaped pixel electrodes, combined with the use of polarizers to counteract interference fringes generated by different transistor characteristics, ensures that the brightness transmittance between odd and even rows of data lines is minimized, improving the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If frame sealing glue is coated over the periphery and cured by ultraviolet rays, then the alignment laminating of array substrate and counter substrate is achieved, but the semiconductor of thin film transistor in gate drive circuit deteriorates due to ultraviolet irradiation
Solution Approach 1:
A shielding structure is introduced as an intermediary element between the ultraviolet curing process and the gate drive circuit. This shielding structure selectively blocks ultraviolet rays from reaching the semiconductor regions while allowing the frame sealing glue to be properly cured in other areas, thus protecting the TFT photoelectric characteristics during the alignment laminating process
Solution Approach 2:
The patent applies differential protection strategies to different regions of the display panel. The gate drive circuit regions receive ultraviolet shielding while other areas undergo normal curing. This local quality approach ensures that only the sensitive semiconductor regions are protected, maintaining manufacturing efficiency while preventing deterioration in critical areas
2Manufacturing precision
If two TFTs relatively far from each other have larger deterioration difference degree, then the difference between output characteristics of gate drive circuits increases, but the display uniformity deteriorates causing horizontal fringes
Solution Approach 1:
The patent implements preliminary protective measures against ultraviolet irradiation before the curing process begins. By pre-installing shielding structures over the gate drive circuits, the system prevents differential deterioration from occurring in the first place, rather than attempting to correct it afterward. This ensures consistent output characteristics across all TFTs and prevents horizontal fringe formation
Solution Approach 2:
The shielding design ensures that all gate drive circuit regions receive equivalent protection from ultraviolet irradiation. By creating uniform shielding conditions across different locations, the patent eliminates potential differences in deterioration levels between TFTs, maintaining consistent electrical characteristics and display uniformity across the entire panel
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
This solution effectively reduces the brightness difference between odd and even rows of pixels, resulting in improved display quality by counteracting horizontal coupling fringes, making the display effect superior to that of existing technologies.
Implementation Method 1
A liquid crystal layer is disposed in accommodating space formed among the first substrate, the second substrate and the frame sealing glue
Implementation Method 2
combined with the use of polarizers to counteract interference fringes generated by different transistor characteristics
Data Source
AI summary
The present disclosure describes an integrated touch display panel and a manufacturing method thereof. The integrated touch display panel comprises a gate drive circuit positioned at an edges of two opposite sides of a first substrate, multiple scanning lines are alternately connected to the gate drive circuit positioned at the edges of two sides, and each scanning line is connected with one of the shift register units. There exists at least one scanning line. The pull up/pull down characteristics of a pull up transistor/pull down transistor of the shift register unit connected with the at least one scanning line are different from the pull up/pull down characteristics of a pull up transistor/pull down transistor of the shift register unit connected with a scanning line adjacent to the at least one scanning line.