Time-shared DC Voltage Converter for Display Power Management
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Solution Overview
Problem
Display devices, particularly organic light-emitting displays, face challenges in efficiently managing DC voltages for pixels, leading to suboptimal power consumption and stability due to the lack of effective control over DC voltage conversion circuits.
Innovation Solution
Incorporating a timing control circuit to generate data signals and conversion control signals that enable time-shared control of first and second DC voltage conversion circuits, allowing for dynamic modification of DC voltages based on pulse numbers and activation/deactivation states, thereby optimizing power distribution and reducing consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate DC voltage conversion circuits are provided for display panel and driving circuit, then voltage conversion can be performed independently, but device complexity and power consumption increase
Solution Approach 1:
The patent combines two separate DC voltage conversion circuits into a single integrated conversion circuit that can serve both the display panel and driving circuit. The conversion circuit includes a converter core unit and multiple output units, where one output unit connects to the display panel and another connects to the driving circuit. This merging reduces device complexity while maintaining independent voltage conversion capability through the multi-output architecture.
Solution Approach 2:
The DC voltage conversion circuit is designed with multi-functionality to serve multiple purposes. A single conversion circuit generates different DC voltages for different components (display panel and driving circuit) through its multi-output units. The circuit can be controlled to provide appropriate voltages to different outputs based on operational requirements, making one circuit perform the function of what would traditionally require two separate circuits.
2Reliability
If DC voltage conversion circuits operate continuously, then stable voltage supply is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic action through the use of enable signals that control the operation of different output units at different times. The conversion circuit operates in a time-shared manner where each output unit is activated only when needed. The control unit receives signals to determine which output unit should be enabled, creating a periodic on-off pattern that reduces overall power consumption while maintaining voltage supply stability during active periods.
Solution Approach 2:
The DC voltage conversion circuit employs dynamic control through enable signals that can activate or deactivate specific output units based on real-time operational requirements. The control unit dynamically adjusts which output units are active, allowing the circuit to adapt its power consumption profile to match actual usage patterns. This dynamic operation enables the system to maintain voltage stability when needed while minimizing power consumption during idle or transition periods.
3Adaptability or versatility
If multiple DC voltages are generated simultaneously, then all components can be powered independently, but conversion efficiency decreases
Solution Approach 1:
The patent uses periodic action to generate multiple DC voltages sequentially rather than simultaneously. The control unit enables different output units at different time periods based on the operational state of the display device. When the display panel needs power, the corresponding output unit is enabled; when the driving circuit needs power, its output unit is enabled. This time-division multiplexing approach maintains multi-voltage capability while improving conversion efficiency by avoiding simultaneous operation of all conversion circuits.
Data Source
AI summary
A display device includes a timing control circuit, a driving circuit, a display panel, and a DC voltage converter. The timing control circuit generates a data signal based on an image signal. The driving circuit generates a first conversion control signal and a second conversion control signal representing a status of the first conversion control signal. The driving circuit generates a driven signal based on the data signal and is powered by a first DC voltage. The display panel is powered by a second DC voltage. The DC voltage converter includes first and second DC voltage conversion circuits. The first DC voltage conversion circuit generates the first DC voltage based on an external voltage. The second DC voltage conversion circuit generates the second DC voltage based on the external voltage. The DC voltage converter executes time-shared control of the first and second DC voltage conversion circuits based on the first and second conversion control signals.