Integrated Display Touch Control Chip Merging Circuits
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Solution Overview
Problem
Current OLED display screens require separate flexible print circuits for display and touch functions, leading to increased cost and thickness due to the need for distinct control chips and circuits.
Innovation Solution
A display panel design that integrates a flexible base substrate with metal signal lines between two substrates, allowing the touch unit to transmit signals to a processing chip via a conductive adhesive, thereby sharing the same processing chip for both display and touch functions, eliminating the need for separate touch and display control chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate flexible print circuits are used for display and touch functions, then each function can be independently controlled, but the cost and thickness of the display sheet increase
Solution Approach 1:
The patent combines the display control chip and touch control chip into a single integrated control chip. The control chip includes a display control module and a touch control module that share common hardware resources such as the microprocessor unit (MPU), memory, and I/O interfaces. This merging eliminates the need for separate flexible print circuits for display and touch functions, reducing both the number of components and the overall thickness of the display assembly while maintaining independent control capabilities for both functions.
Solution Approach 2:
The integrated control chip is designed with multi-functionality, where a single chip performs both display control and touch control functions. The control chip can selectively activate the display control module or touch control module based on the operational mode, allowing one chip to replace what would traditionally require two separate chips. This universal approach reduces device complexity and cost while preserving the independent control capability needed for reliable operation.
2Reliability
If separate flexible print circuits are used for display and touch functions, then each function has dedicated control, but the overall thickness of the display increases
Solution Approach 1:
The patent merges the display control circuit and touch control circuit into a single integrated control chip that is mounted on one flexible print circuit. This eliminates the need for a second separate flexible print circuit for touch control, thereby reducing the overall thickness of the display assembly. The integrated chip shares common resources including processing units, memory, and communication interfaces, allowing dedicated control functions to be achieved without the physical separation of multiple circuits.
3Reliability
If separate flexible print circuits are used for display and touch functions, then each control chip can be optimized independently, but the cost of the display increases
Solution Approach 1:
The patent combines display control and touch control functions into a single integrated control chip, reducing the total component count and assembly complexity. This integration allows manufacturers to source and assemble fewer parts, reducing overall manufacturing cost. The integrated chip can still provide optimized control for each function through software configuration and modular control algorithms, maintaining reliability while lowering the bill of materials cost and assembly expenses.
Solution Approach 2:
The universal control chip design allows a single component to replace two separate control chips, directly reducing the bill of materials cost. The chip is designed with configurable modules that can be optimized for specific display and touch control requirements through firmware or software, maintaining the ability to provide optimized control functions without the need for separate hardware components, thereby reducing manufacturing cost while preserving functional optimization.
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 integration reduces the number of flexible print circuits and control chips, lowering costs and thickness while maintaining flexibility and bendability, enabling efficient signal transmission and control of both display and touch functions with a single processing chip.
Implementation Method 1
the touch unit transmits a touch signal to the plurality of metal signal lines through a conductive adhesive
Data Source
AI summary
The present disclosure provides a display panel and a display device, comprising: a flexible base substrate comprising a first flexible substrate, a second flexible substrate, and metal signal lines located between the first flexible substrate and the second flexible substrate; a display unit disposed on the flexible base substrate; a touch unit disposed on a light-exiting side of the display unit and covering the display unit; and a processing chip connected to the flexible base substrate for receiving and feeding back signals from the display unit and/or the touch unit. The metal signal lines are electrically connected to the processing chip and the touch unit transmits a touch signal to the metal signal lines through a conductive adhesive. By transmitting the touch signal to the processing chip through the conductive adhesive, the touch unit and the display unit can share one processing chip.