Boosted Display Driving Circuit for Low-Power Brightness Uniformity
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Solution Overview
Problem
Current display technologies face issues with high power consumption due to increased driving cross-voltage and longer raising/falling times, which are inherent in multi-emission architectures aimed at achieving high brightness uniformity.
Innovation Solution
A display driving device incorporating a light-emitting circuit, control circuit, and boost circuit, where the boost circuit enhances the voltage level at a first node beyond that of a second node, allowing the transistor to operate in the linear region, thereby optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a multi-emission architecture is adopted to achieve high brightness uniformity, then brightness uniformity is improved, but power consumption increases due to increased driving cross-voltage and longer raising and falling times
Solution Approach 1:
The patent changes the voltage parameter by introducing a boost circuit that increases the voltage level at the gate terminal of the transistor. This voltage boosting enables the transistor to operate in the linear region, which reduces the driving cross-voltage requirements and thereby decreases power consumption while maintaining brightness uniformity
2Use of energy by moving object
If the voltage level at the gate terminal of the transistor is increased through the boost circuit, then the transistor can operate in the linear region reducing power consumption, but the device complexity increases
Solution Approach 1:
The patent introduces a boost circuit as an intermediary component between the control circuit and the light-emitting circuit. This mediator circuit specifically addresses the voltage level requirement by boosting the voltage only when needed for transistor turn-on, thereby reducing overall power consumption without significantly complicating the entire display driving system
Data Source
AI summary
A display driving device includes a light emitting circuit, a control circuit, and a boost circuit. The light emitting circuit is coupled to a first node. The light emitting circuit is configured to emit according to a first emission signal, a second emission signal, and a voltage level at the first node. The control circuit is coupled to a second node. The control circuit is configured to charge the second node according to a sweep signal and the first emission signal. The boost circuit is configured to boost and charge a voltage level at the second node to the first node. The voltage level at the first node is greater than the voltage level at the second node.