LED Display Voltage Segmentation for Power Reduction
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Solution Overview
Problem
LED display devices with narrowed pixel pitches face increased power consumption and reduced lifetime due to common voltage supply methods, leading to higher costs and limited availability of efficient drive circuits.
Innovation Solution
An LED display device with multiple LED arrays grouped to receive different voltages, utilizing time-sharing control to switch between voltage supplies and synchronize LED activation, reducing power consumption and extending LED lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If anode common connection is used to reduce terminals in LED package, then device complexity is reduced, but power consumption increases due to common voltage supply to LEDs with different forward voltages
Solution Approach 1:
The invention segments the LED array into multiple groups (first LED array group and second LED array group) with different connection configurations. Some LED arrays use anode common connection while others use cathode common connection, allowing different voltage supply strategies for different segments. This segmentation enables reduced power consumption while maintaining manufacturing simplicity.
Solution Approach 2:
The invention dynamically switches between different LED array groups based on driving requirements. The driving device can selectively activate specific LED arrays with appropriate connection types, adapting the power supply configuration to match the actual display needs and reduce overall power consumption.
2Use of energy by moving object
If cathode common connection is used to reduce power consumption, then power consumption is suppressed, but device complexity increases and drive circuit availability decreases
Solution Approach 1:
The invention segments the LED array into multiple groups (first LED array group and second LED array group) with different connection configurations. Some LED arrays use anode common connection while others use cathode common connection, allowing different voltage supply strategies for different segments. This segmentation enables reduced power consumption while maintaining manufacturing simplicity.
Solution Approach 2:
The driving device is designed to handle multiple LED array types with different connection configurations. It can supply different voltages to different LED array groups and perform time-division multiplexing control, making the drive circuit universally applicable to various LED array configurations without requiring separate dedicated circuits.
3Duration of action of stationary object
If cathode common connection is used to extend LED lifetime, then lifetime is improved, but cost increases due to limited drive circuit manufacturers
Solution Approach 1:
The invention segments the LED array into multiple groups (first LED array group and second LED array group) with different connection configurations. Some LED arrays use anode common connection while others use cathode common connection, allowing different voltage supply strategies for different segments. This segmentation enables reduced power consumption while maintaining manufacturing simplicity.
Solution Approach 2:
The driving device is designed to handle multiple LED array types with different connection configurations. It can supply different voltages to different LED array groups and perform time-division multiplexing control, making the drive circuit universally applicable to various LED array configurations without requiring separate dedicated circuits.
4Use of energy by moving object
If multiple voltages are supplied to different LED arrays, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The invention dynamically switches between different LED array groups based on driving requirements. The driving device can selectively activate specific LED arrays with appropriate connection types, adapting the power supply configuration to match the actual display needs and reduce overall power consumption.
Solution Approach 2:
The driving device performs time-division multiplexing control, periodically switching between different LED array groups. This periodic action allows multiple LED arrays with different connection types to be driven sequentially, reducing the need for complex simultaneous multi-voltage supply circuits.
Data Source
AI summary
An object is to provide a technique capable of suppressing a power consumption of an LED. An LED display device includes voltage supply parts, which can supply a multiple types of voltages being different from each other and a driver which drives an LED display using the multiple types of voltages. The driver switches a combination of an LED array in a lighting target group which is one of the plurality of groups being subject to lighting-up and the multiple types of voltages which should be supplied in parallel with the LED array, under a time sharing control, and turns on some LEDs, which should be turned on by the voltages which should be supplied to the LED array, in the plurality of LEDs included in the LED array in the lighting target group.