TDDI Charging Circuitry Intermittent Power Switching
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Solution Overview
Problem
Display devices with Touch and Display Driver Integration (TDDI) chips face challenges in achieving low power consumption due to the need to allocate time for image output and touch reading, resulting in idle periods and increased power usage.
Innovation Solution
A charging circuitry with a switch sub-circuitry that controls the power supply voltage to be electrically coupled or decoupled from the driving sub-circuitry during charging periods, allowing the driving sub-circuitry to charge the data line and then turn off, reducing power consumption through intermittent charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving sub-circuitry continuously charges the data line to maintain display function, then the display reliability is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic charging by controlling the switch sub-circuitry to periodically connect and disconnect the power supply voltage to the driving sub-circuitry. This allows the data line to be charged in intervals rather than continuously, reducing power consumption while maintaining display reliability through periodic refresh cycles.
Solution Approach 2:
The patent dynamically adjusts the charging state of the driving sub-circuitry by using the switch sub-circuitry to transition between connected and disconnected states. This dynamic control allows the system to adapt power supply to actual needs, preventing continuous power consumption while ensuring display function is maintained when needed.
2Use of energy by moving object
If the driving sub-circuitry is turned off during idle periods to reduce power consumption, then the power consumption is reduced, but the response time increases
Solution Approach 1:
The patent applies preliminary action by pre-charging the data line before the display actually needs to display content. The switch sub-circuitry connects the power supply in advance to charge the data line, so when display content needs to be shown, the charging is already complete or near-complete, minimizing the response time delay while still allowing power savings during extended idle periods.
3Use of energy by moving object
If intermittent charging is implemented to reduce power consumption, then the power consumption is reduced, but the charging completeness may be compromised
Solution Approach 1:
The patent implements feedback control where the charging state of the data line is monitored and used to control the switch sub-circuitry. When the data line reaches sufficient charge level, the feedback signal causes the switch to disconnect power supply, preventing over-charging and wasted energy. This ensures charging completeness is achieved at the optimal moment while maximizing power savings.
Data Source
AI summary
The present disclosure provides a charging circuitry, a display device, a wearable device, a display driving method and a display driving device. The charging circuitry includes: a driving sub-circuitry configured to receive an image signal and convert the image signal into a display driving signal to be outputted to a data line of the array substrate; a circuitry power supply voltage end configured to apply a direct current voltage to the driving sub-circuitry; and a switch sub-circuitry arranged on a connection circuitry between the circuitry power supply voltage end and the driving sub-circuitry, and configured to be switched between a first state where the circuitry power supply voltage end is electrically coupled to the driving sub-circuitry and a second state where the circuitry power supply voltage end is electrically decoupled from the driving sub-circuitry.