Display Touch Device Power Supply Control for Sleep Mode Wake-Up
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Solution Overview
Problem
Conventional display touch devices cannot conveniently wake up a system from sleep mode by using the touch function, as they lack the capability to detect touch events effectively when the display is turned off for power conservation.
Innovation Solution
A display touch device comprising a display panel, a display touch driving circuit, and a touch operation processing circuit that provides a first touch enable signal to control touch detection, along with a power management module and power supply control circuit to manage power distribution and enable touch detection even when the display is off, allowing the system to be woken up by screen tapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display is turned off to save power consumption, then power consumption is reduced, but the touch function cannot detect touch events to wake up the system
Solution Approach 1:
The patent segments the power supply control into different modes: when the display is off, only the touch detection circuit remains powered while the display driving circuit is powered down. This segmentation allows touch events to be detected even when the display is off, resolving the contradiction between power saving and touch detection capability.
Solution Approach 2:
The patent implements dynamic power management where the power supply control circuit dynamically adjusts power distribution based on the display state. When a touch event is detected during the display-off period, the system dynamically transitions from low-power mode to full operation mode, enabling the display to turn on and resume normal function without flicker or afterimage.
2Use of energy by stationary object
If the display touch device enters sleep mode with display turned off, then power consumption is saved, but the system cannot wake up through touch input
Solution Approach 1:
The patent prepares the touch detection circuit in advance to remain operational even when the display is turned off. This preliminary action ensures that the system can immediately respond to touch events during sleep mode without requiring full system activation, maintaining ease of operation while saving power.
Solution Approach 2:
The power supply control circuit acts as an intermediary that manages the transition between sleep mode and active mode. It receives touch detection signals during low-power state and mediates the power distribution to activate the display and processing circuits, enabling convenient wake-up functionality.
3Adaptability or versatility
If power supply control circuit switches between display power supply and touch power supply, then touch detection during sleep mode is enabled, but circuit complexity increases
Solution Approach 1:
The power supply control circuit is designed with multi-functionality to handle both display power supply and touch power supply operations. By integrating these functions into a single control unit, the patent achieves adaptability for touch detection during sleep mode while managing circuit complexity through functional consolidation rather than adding separate dedicated circuits.
Data Source
AI summary
The present disclosure provides a display touch device and a control method. The display touch device includes a display panel, a display touch driving circuit and a touch operation processing circuit, wherein the display panel includes a plurality of gate lines; the touch operation processing circuit is configured to provide a first touch enable signal to the display touch driving circuit when it is detected that the display touch device is in a touch-only detection state, to control the display touch driving circuit to perform touch detection. The present disclosure can conveniently perform touch detection when the display touch device is in the touch-only detection state.