Light-emitting Device Driver Chip Parallel Current Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light-emitting device driver chips have a limited current output range, necessitating replacement when higher brightness is required, which restricts their applicability.
Innovation Solution
A light-emitting device driver chip with multiple current control circuits and a parallel control circuit that allows the current control modules to output the same current through parallel connection, enabling increased current output by superimposing currents from multiple modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the current output parameter of the driver chip is increased to provide higher brightness, then the light-emitting brightness is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges multiple current control circuits (first current control circuit and second current control circuit) into a single driver chip. These circuits can be connected in parallel through the parallel control circuit to provide higher output currents for greater light-emitting brightness, while maintaining individual circuit simplicity for easier manufacturing
Solution Approach 2:
The patent introduces a dynamic parallel control circuit that can switch between single-circuit and dual-circuit parallel operation modes. This dynamic configuration allows the driver chip to adapt its current output capability based on application requirements, providing flexibility without permanently increasing complexity
2Illumination intensity
If the driver chip is replaced with a model having larger output current parameter to achieve higher brightness, then the light-emitting brightness is improved, but the adaptability and ease of operation deteriorate
Solution Approach 1:
The driver chip is designed with multi-functionality by integrating both first and second current control circuits that can operate independently or in parallel. This universal design allows the same chip model to adapt to different brightness requirements without replacement, enhancing versatility across various applications
3Adaptability or versatility
If multiple current control circuits are integrated into the driver chip to expand current range, then the applicable range is broadened, but the device complexity increases
Solution Approach 1:
The driver chip is segmented into independent first and second current control circuits, each capable of functioning autonomously. This segmentation allows the circuits to be designed and manufactured as standardized modules, reducing overall complexity while enabling flexible parallel operation to expand current range
Data Source
AI summary
Aa light-emitting device driver chip, a backlight module, and a display panel are provided. The light-emitting device driver chip includes at least two current control circuits and a parallel control circuit. Each of the at least two current control circuits includes a current control module. A control output node of the current control module is electrically connected to a corresponding one of the output ports. The parallel control circuit is electrically connected between the at least two current control circuits and is configured to control, according to a parallel control signal received from a first input port, the current control modules of the at least two current control circuits to be electrically connected to enable the current control modules of the at least two current control circuits to output the same current to corresponding ones of the output ports through the control output nodes.