Touchscreen Driver Circuit Sleep Mode Control
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Solution Overview
Problem
Touch sensor display devices with embedded touch sensors face challenges in reducing power consumption, as they often enter a sleep mode unnecessarily due to the continuous detection of touch inputs, leading to increased power usage.
Innovation Solution
A touch sensor display device with a touchscreen driver circuit that includes a sleep module and a wake-up module, using bidirectional interface signals to manage mode changes, allowing for rapid mode transitions and reduced power consumption by determining when to enter sleep or wake-up modes based on touch sensing data thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the touch sensor display device continuously determines whether a touch input is applied to ensure rapid response, then the response speed is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of the determination period based on touch input state. When no touch input is detected, the system extends the determination period to enter sleep mode, reducing power consumption. When touch input is detected, the system shortens the determination period to enable rapid response. This dynamic timing adjustment resolves the contradiction between response speed and power consumption by adapting the monitoring frequency to the current operational state.
Solution Approach 2:
The patent employs periodic touch input determination with variable periods. Instead of continuous monitoring, the system checks for touch inputs at predetermined intervals. The period length is dynamically adjusted: longer periods during idle states to save power, and shorter periods during active states to maintain responsiveness. This periodic action with adaptive timing resolves the technical contradiction by eliminating unnecessary continuous monitoring while ensuring timely detection of touch inputs.
2Use of energy by moving object
If the touch sensor display device enters sleep mode to reduce power consumption, then power consumption is reduced, but the response time to detect touch input increases
Solution Approach 1:
The patent dynamically adjusts the determination period based on the operational state. When in sleep mode, the system uses an extended determination period to minimize power consumption while still periodically checking for touch inputs. Upon detecting touch input, the system immediately transitions to an active state with a shortened determination period, ensuring rapid response. This dynamic period adjustment resolves the contradiction by optimizing the balance between power saving and response time based on current state.
Solution Approach 2:
The patent implements a preliminary determination process where the system checks for touch inputs at extended intervals during sleep mode. This preliminary checking mechanism allows the system to remain in low-power state while still detecting touch inputs timely. When a touch input is detected during the extended determination period, the system immediately wakes up and switches to rapid response mode, thus resolving the contradiction between power consumption and response time.
3Use of energy by moving object
If the determination period for touch input is extended to reduce power consumption, then power consumption is reduced, but the ability to detect touch input timely deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of the determination period based on touch detection state. During idle periods, the system extends the determination period to reduce power consumption. However, when a touch input is detected, the system immediately shortens the determination period to ensure reliable and timely detection. This dynamic adaptation maintains touch detection reliability while optimizing power consumption during idle states.
Solution Approach 2:
The patent uses feedback from touch detection results to adjust the determination period. The system continuously monitors touch input status and adjusts the determination period accordingly: extending it when no touch is detected to save power, and shortening it when touch detection is needed to maintain reliability. This feedback-based adaptive timing resolves the contradiction between power consumption and touch detection reliability by using actual detection needs to guide timing adjustments.
Data Source
AI summary
A touch sensor display device and an interface method thereof are provided. The touch sensor display device comprises a display panel in which a touch panel, gate lines, data lines, sensing lines, and subpixels are disposed; a gate driver circuit drives the gate lines; a data driver circuit drives the data lines; a touchscreen driver circuit drives the sensing lines, and includes a sleep module which controls switching to a sleep mode, and a wake-up module which performs a wake-up function to cancel and return to a normal state, and transmitting a sleep mode signal pattern or a wake-up signal pattern to the micro control unit; and a micro control unit determining whether a touch is detected, by the touchscreen driver circuit. Accordingly, power consumption is reduced in the display device. A mode change is performed by a driver circuit to enable rapid mode changes while reducing power consumption.