Display Panel Time-Sharing Data and Touch Signal Routing
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Solution Overview
Problem
The high number of bonding terminals and pins in display panels, particularly those with touch and display functions, complicates the bonding process and affects yield, especially in flexible substrates, due to the increased complexity and limitations of current bonding machines.
Innovation Solution
A display panel design that utilizes first bonding terminals for time-sharing data and touch signals through gating circuits, and a driving chip with output pins that also time-share data and touch signals, reducing the total number of required terminals and pins by multiplexing them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a TDDI chip is used to control both touch and display functions, then the number of bonding terminals and pins increases, but the bonding process becomes more difficult and product yield is affected
Solution Approach 1:
The patent applies multi-functionality by enabling bonding terminals to serve dual purposes: transmitting data signals during display operation and touch signals during touch operation. The gating circuit controls signal routing to allow the same physical terminal to handle different signal types at different times, thereby reducing the total number of terminals needed while maintaining both display and touch functionality
Solution Approach 2:
The patent implements dynamics through time-division multiplexing where the bonding terminals dynamically switch between transmitting data signals and touch signals. The gating circuit enables this dynamic switching by selectively connecting different signal sources to the same terminal based on operational mode, allowing adaptive reuse of terminal resources
2Adaptability or versatility
If the number of bonding terminals increases, then both display and touch functions can be controlled, but the bonding process complexity increases and affects manufacturing yield
Solution Approach 1:
The bonding terminals are designed with multi-functionality to handle both display data signals and touch control signals through time-division multiplexing. The gating circuit enables a single terminal to be universally used for different signal types at different times, reducing the total terminal count and simplifying the bonding process while maintaining dual functionality
Solution Approach 2:
The patent merges the function of separate data signal terminals and touch signal terminals into a single shared terminal. By combining these functions through time-division multiplexing controlled by the gating circuit, the patent reduces the number of bonding operations required while maintaining the ability to transmit both types of signals
Data Source
AI summary
A display panel, a driving chip, and a display device are provided. The display panel includes: a plurality of pixel columns connected to a plurality of data lines where the plurality of data lines includes first data lines; a plurality of touch channels connected to a plurality of touch leads; a plurality of bonding terminals including first bonding terminals; and first gating circuits. The first bonding terminals are used for transmission of data signals and touch signals in a time-sharing manner. One first gating circuit is connected between one corresponding first bonding terminal, one corresponding first data line, and one corresponding touch lead, and is used to connect the corresponding first data line and the corresponding touch lead to the corresponding first bonding terminal in a time-sharing manner.