Display Device Power Sequencing to Prevent Signal Reversal
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Solution Overview
Problem
Display devices experience abnormal display due to the reversal of signal flow sequences caused by varying signal and power values during operation, leading to issues such as flickering.
Innovation Solution
A display device with a power circuit that generates a high-potential power voltage and a sequence control circuit to manage the power circuit's operation through a power control signal, ensuring controlled signal flow sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device operates with varying signal and power values during different operation states, then the display device can adapt to different operating conditions, but the signal flow sequence may reverse causing abnormal display
Solution Approach 1:
The patent applies preliminary action by generating a power control signal in advance based on the high-potential input voltage before the actual power switching occurs. This advance preparation ensures that the power circuit receives proper control signals before voltage variations can cause signal flow reversal, thus maintaining reliable operation while adapting to different operating conditions.
2Speed
If the power circuit generates high-potential power voltage dynamically, then the display device can respond to changing power requirements, but the signal flow sequence reversal may occur due to timing differences
Solution Approach 1:
The patent implements feedback by continuously monitoring the high-potential input voltage and using this information to generate the power control signal. This feedback mechanism ensures that the power circuit responds dynamically to changing power requirements while maintaining correct signal flow sequence, as the control signal is continuously adjusted based on the actual voltage conditions.
3Productivity
If different signals change at different rates during operation, then the display device can optimize performance for each signal type, but the sequence of signal flow may be reversed
Solution Approach 1:
The patent introduces an intermediary element - the power control signal - that mediates between the high-potential input voltage and the power circuit operation. This intermediary ensures that even when different signals change at different rates, the power circuit receives properly timed control signals that prevent signal flow sequence reversal, thus maintaining reliability while allowing signal optimization.
Data Source
AI summary
According to an aspect of the present disclosure, the display device includes a display panel in which a pixel circuit including a light-emitting diode and a driving transistor connected to the light-emitting diode is disposed. Also, the display device includes a power circuit configured to generate a high-potential power voltage and supplies the high-potential power voltage to the pixel circuit. Further, the display device includes a sequence control circuit connected to the power circuit, configure to generate a power control signal for controlling whether or not to operate the power circuit and supplies the power control signal to the power circuit.