Touch Display Signal Output Circuit for Dual-Voltage Driving
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Solution Overview
Problem
Existing touch display devices face challenges due to the need for components capable of operating in a wide voltage range, leading to increased area occupation and cost, as well as the requirement for external power supplies and internal step-up circuits to manage display and touch driving signals with different voltage levels.
Innovation Solution
A driving signal output circuit designed to operate in a narrow voltage range, allowing for the selective output of display and touch driving signals with different voltage levels using medium voltage components, reducing the need for high voltage components and external power supplies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components capable of operating in a wide voltage range are used to selectively supply display and touch driving signals, then the device can handle both display and touch functions, but the area occupation increases and manufacturing cost increases
Solution Approach 1:
The patent divides the driving signal output into separate circuits: a display driving signal output circuit operating in a first voltage range and a touch driving signal output circuit operating in a second voltage range. This segmentation allows each circuit to use components optimized for their specific voltage range, avoiding the need for wide-voltage-range components and reducing area occupation.
Solution Approach 2:
The patent implements time-division multiplexing where the display and touch driving signals are supplied at different time periods. The first signal is output during a first time period and the second signal during a second time period, allowing dynamic switching between display and touch functions. This temporal separation enables the use of narrower voltage range components while maintaining versatility.
2Adaptability or versatility
If components capable of operating in a wide voltage range are used to selectively supply display and touch driving signals, then the device can handle both display and touch functions, but the manufacturing cost increases
Solution Approach 1:
The patent segments the driving signal output into separate circuits operating at different voltage ranges, allowing each circuit to use cost-optimized components for its specific function rather than expensive wide-voltage-range components, thereby reducing manufacturing cost.
Solution Approach 2:
The patent changes the operating voltage parameter for different circuits: the display driving signal output circuit operates in a first voltage range while the touch driving signal output circuit operates in a second voltage range. This parameter differentiation allows selection of appropriate, cost-effective components for each circuit.
3Reliability
If external power supply and internal step-up circuit are added to reduce component resistance, then the component performance improves, but the device complexity increases
Solution Approach 1:
The patent segments the power supply requirements by creating separate output circuits for display and touch functions with different voltage ranges, eliminating the need for complex external power supplies and internal step-up circuits that would be required if a single wide-voltage-range circuit were used.
Data Source
AI summary
The present disclosure relates to a touch display device, a driving signal output circuit, and a driving signal output method of the touch display device. The present disclosure provides a touch display device, a driving signal output circuit, and a driving signal output method of the touch display device, for selectively outputting to a panel a display driving signal and a touch driving signal, which have different voltage levels.