Pixel Circuit Latch Sub-Circuit for uLED Power Reduction
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Solution Overview
Problem
In micro light-emitting diode (uLED) technology, the integrated circuit (IC) must continuously supply signals to LEDs for normal operation, leading to increased power consumption.
Innovation Solution
A pixel circuit with an input sub-circuit, latch sub-circuit, and output sub-circuit is designed to transmit signals to light-emitting units, allowing the latch sub-circuit to generate and store control signals, enabling the light-emitting units to be controlled independently, reducing the need for continuous IC signal input during unchanged images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the IC continuously supplies signals to LEDs for normal operation, then the display function is maintained, but the power consumption of the IC increases
Solution Approach 1:
The latch sub-circuit stores control signals in advance, allowing the pixel circuit to maintain display state without continuous IC intervention. The latch circuit captures and holds the control signal during the scan period, enabling the LED to continue operating based on stored signals rather than requiring continuous real-time control from the IC.
Solution Approach 2:
The latch sub-circuit acts as an intermediary between the IC and the LED. It receives control signals from the IC during specific time windows and then autonomously maintains the display state, mediating between the IC's intermittent signal output and the LED's continuous operation requirement.
2Reliability
If the IC continuously supplies signals to LEDs, then normal display is ensured, but the complexity of the driving system increases
Solution Approach 1:
The pixel circuit is segmented into distinct functional sub-circuits: input sub-circuit for signal reception, latch sub-circuit for signal storage and control, and output sub-circuit for signal transmission to LED. This segmentation allows each component to perform its specific function efficiently, reducing the overall system complexity while maintaining reliable display operation.
3Use of energy by moving object
If the latch sub-circuit stores control signals, then continuous IC input is reduced, but the circuit structure becomes more complex
Solution Approach 1:
The input sub-circuit, latch sub-circuit, and output sub-circuit are merged into a single integrated pixel circuit structure. This consolidation allows the circuit to achieve low power consumption through signal latching while avoiding the complexity of separate discrete components, as the entire control mechanism is embedded within the pixel circuit itself.
Data Source
AI summary
The present disclosure relates to a pixel circuit. The pixel circuit may include at least one light emitting circuit. One of the at least one light emitting circuit may include an input sub-circuit, a latch sub-circuit, and an output sub-circuit. The input sub-circuit may be configured to transmit a signal at a data voltage terminal to the latch sub-circuit. The latch sub-circuit may be configured to generate a control signal in accordance with the signal at the data voltage terminal and store the control signal. The output sub-circuit may be configured to transmit one of a signal at a first voltage terminal and a signal at a second voltage terminal to a light emitting unit under control of the control signal.