LED Driving Circuit Clock Signal Control for Black Screen Power Reduction
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Solution Overview
Problem
Conventional LED driving circuits consume high power even when displaying a black screen due to built-in components like PLL, which continue to operate, leading to increased energy usage.
Innovation Solution
The proposed solution introduces a transmission identification field in the data signal, allowing the LED driving circuit to determine whether to turn off or maintain clock signal transmission based on display data, thereby reducing power consumption by disabling unnecessary components during a black screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the LED driving circuit uses built-in components like PLL to maintain stable operation, then the reliability and stability of the display system is improved, but the power consumption increases even during black screen display
Solution Approach 1:
The patent applies dynamics by making the operating state of the LED driving circuit adjustable rather than fixed. The circuit can dynamically switch between different operational modes (normal mode and power-saving mode) based on the display content requirements, allowing components like PLL to be selectively enabled or disabled to optimize the balance between stability and power consumption.
Solution Approach 2:
The patent changes the operational parameters of the LED driving circuit by introducing a power-saving mode with different parameter settings. In this mode, the clock signal transmission is stopped and components are disabled, effectively changing the circuit's operational parameters to reduce power consumption while maintaining the ability to switch back to normal parameters when needed.
2Stability of the object's composition
If the LED driving circuit continuously transmits clock signals to maintain synchronization, then the stability of LED display is improved, but the power consumption increases during black screen periods
Solution Approach 1:
The patent implements periodic action by allowing the clock signal transmission to be间歇性 (intermittent) rather than continuous. The circuit periodically checks whether the current and next display frames are both black screens, and only transmits clock signals when needed, thereby reducing energy loss during periods when continuous transmission would not provide additional stability benefits.
Solution Approach 2:
The patent extracts the essential function of clock signal transmission from the continuous operation and separates it into conditional operation. By taking out the clock signal transmission from the always-on state and making it conditional based on display content, the system maintains synchronization stability only when necessary while reducing energy loss during black screen periods.
3Adaptability or versatility
If the LED driving circuit maintains all components active to handle any display scenario, then the adaptability is improved, but the power consumption increases unnecessarily during black screen display
Solution Approach 1:
The patent applies dynamics by making the operational state of the LED driving circuit adjustable rather than fixed. The circuit can dynamically switch between different operational modes (normal mode and power-saving mode) based on the display content requirements, allowing components like PLL to be selectively enabled or disabled to optimize the balance between stability and power consumption.
Solution Approach 2:
The patent applies preliminary action by checking in advance whether the current and next display frames are both black screens before deciding to enter power-saving mode. This preliminary check allows the circuit to proactively reduce power consumption without compromising the ability to handle subsequent display scenarios, as the decision is made based on predicted needs rather than reactive adjustments.
Data Source
AI summary
A display control method for an LED display system, an LED driving circuit and an LED display system are provided. The display control method includes: receiving a data signal that includes at least transmission identification and display data and a clock signal; controlling serial transmission of the clock signal according to the transmission identification in each of a plurality of groups of cascaded LED driving circuits. The disclosure determines transmission identification of a next display cycle according to display data of a current display cycle and display data of the next display cycle, and turn on or off transmission of a clock signal in the current display cycle in accordance with the transmission identification. When the control terminal has a plurality of ports which share the clock signal, the LED driving circuit can turn off modules as many as possible for a black screen, thereby reducing power consumption.