OLED Panel Driving Circuit Voltage Transition Control
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Solution Overview
Problem
Current display technologies, such as OLED devices, face challenges in entering a low-power mode without displaying abnormal images, as they cannot adopt the same low-power modes as LCD devices, leading to inefficiencies in power management.
Innovation Solution
A display device and driving method that include a power supply unit and panel driving circuit to adjust the voltage levels and transition times for high-potential voltage lines, enabling a gradual change from normal to low-power mode without sudden voltage drops, thus suppressing abnormal image display and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply unit is disabled to enter low-power mode, then power consumption is reduced, but abnormal images are displayed
Solution Approach 1:
The patent applies preliminary action by adjusting the voltage level and transition time before completely disabling the power supply unit. The panel driving circuit pre-adjusts the high-potential voltage to an intermediate level and controls the transition duration to prevent abnormal image display, ensuring smooth mode switching without visual artifacts.
Solution Approach 2:
The patent implements dynamics by making the voltage transition time adjustable rather than fixed. The panel driving circuit dynamically controls the transition duration from normal mode to low-power mode, allowing the system to adapt the switching characteristics to prevent display abnormalities while entering power-saving state.
2Productivity
If the voltage level is quickly reduced from first high-potential voltage to second high-potential voltage, then power consumption is reduced faster, but abnormal images are displayed
Solution Approach 1:
The patent applies dynamics by making the transition time a controllable parameter. The panel driving circuit adjusts the voltage transition time dynamically, allowing optimization between transition speed and image quality. This enables the system to achieve fast mode switching while preventing display abnormalities through controlled transition duration.
Solution Approach 2:
The patent implements parameter changes by modifying both the voltage level and the transition time parameters during mode switching. The panel driving circuit changes the high-potential voltage from the first level to the second level while simultaneously adjusting the transition duration, achieving both power savings and display quality through coordinated parameter optimization.
3Loss of energy
If the brightness changes suddenly during mode transition, then power consumption is reduced faster, but the image appearance becomes unnatural
Solution Approach 1:
The patent applies dynamics by controlling the brightness transition as a time-dependent process. The panel driving circuit manages the gradual brightness change from normal to low-power mode levels, allowing the display to adapt smoothly to the new brightness state, thereby maintaining natural image appearance while achieving power savings.
Solution Approach 2:
The patent implements preliminary action by preparing the voltage transition in advance before complete power reduction. The panel driving circuit initiates the controlled voltage adjustment and brightness transition process, ensuring that the display adapts gradually to the new power state, which maintains image naturalness while enabling power consumption reduction.
Data Source
AI summary
A display device is provided that includes a panel driving circuit configured to control the power supply unit to be disabled in response to a low-power mode and adjust a length of time required for a voltage level applied to high-potential voltage lines to transition from a first high-potential voltage to a second high-potential voltage. Thus, it is possible to suppress display of an abnormal image on a display panel in the low-power mode, and a length of time for transitioning from the normal mode to the low-power mode can be adjusted, and, thus, the brightness of the display panel can be naturally changed.