Display Panel Driving Circuit Partial Screen Power Management
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Solution Overview
Problem
OLED display panels with multiple display regions face high power consumption during partial screen display modes, such as half screen display, due to drive ICs continuing to work and provide black images to non-displaying regions, leading to leakage currents and increased energy usage.
Innovation Solution
A driving circuit and method that selectively control light emitting signal drivers for each display region, ensuring that drivers for non-displaying regions are powered down, preventing leakage currents by maintaining the light emitting control terminals in an OFF state through appropriate signal control and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all display regions are driven to display during partial screen display mode, then the display panel can maintain uniform driving control, but power consumption increases due to unnecessary light emission in non-displaying regions
Solution Approach 1:
The display panel is divided into multiple independent display regions, each with its own light emitting signal driver. This segmentation allows individual control of each region's light emission, enabling the system to turn off light emission in non-displaying regions while maintaining driving control capability, thus reducing power consumption without sacrificing operational flexibility
Solution Approach 2:
The light emitting signal drivers are designed to dynamically adjust their operation state based on display requirements. During partial screen display, the drivers for non-displaying regions enter a low-power state while drivers for active regions continue normal operation. This dynamic state adjustment resolves the contradiction by allowing uniform driving control architecture while adapting power consumption to actual display needs
2Stability of the object's composition
If light emitting signal drivers continue to work in non-displaying regions, then the display panel maintains consistent signal distribution, but leakage currents increase and energy is wasted
Solution Approach 1:
Instead of maintaining full signal distribution to all regions, the system applies partial action by selectively activating light emitting signal drivers only for regions that require display. The OFF signal terminal provides a controlled signal that prevents excessive light emission in non-displaying regions, reducing energy waste while maintaining sufficient signal distribution consistency for active regions
Solution Approach 2:
The system changes the operational parameters of light emitting signal drivers based on region requirements. By adjusting the signal level at the OFF signal terminal, the system can modify the output characteristics of light emitting signal drivers to prevent leakage currents in non-displaying regions while maintaining proper signal distribution to active regions, thus reducing energy waste without compromising signal consistency where needed
Data Source
AI summary
A driving circuit of a display panel includes: a first driving control circuit configured to, in a first display state, provide a signal of an OFF signal terminal to a starting node of a first light emitting signal driver according to a control signal of an ON level provided by a control signal terminal; the first light emitting signal driver configured to, in the first display state, control a light emitting signal output terminal to provide an OFF-level signal to a light emitting control terminal of a pixel driving circuit in a first display region according to the signal of the OFF signal terminal; and a second light emitting signal driver configured to, in the first display state, control a light emitting signal output terminal to provide a light emitting signal to a light emitting control terminal of a pixel driving circuit in a second display region.