OLED Display Data Driver Power Reduction in Standby Mode
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Solution Overview
Problem
Existing organic light emitting displays face high power consumption in standby mode due to continuous operation of the data driver, which reduces battery life in portable devices.
Innovation Solution
The display is configured with a first and second emission region, where light is emitted only in the first region during standby mode, and the data driver is only active during data signal transmission to this region, utilizing an initialization power source to block current to the second region, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data driver operates continuously to maintain display functionality, then the display can respond immediately to user input, but power consumption increases during standby mode
Solution Approach 1:
The data driver transitions between active and standby states dynamically based on display mode. In full display mode, the data driver operates continuously to ensure immediate responsiveness. In standby mode with partial screen display, the data driver enters a low-power state, activating only when needed, thus balancing responsiveness with power conservation
Solution Approach 2:
The data driver operates periodically rather than continuously during standby mode. It activates at specific intervals to refresh the partial screen display and then returns to a low-power state, reducing overall power consumption while maintaining necessary display functionality
2Reliability
If the data driver is activated for the entire screen in standby mode, then the display is fully ready for any input, but power consumption is not reduced
Solution Approach 1:
The data driver applies different operational characteristics to different regions of the display. During standby mode, it activates only the data lines corresponding to the partial screen region that needs to display information, while keeping other regions in a low-power state, thus reducing power consumption without compromising display readiness for the active area
Solution Approach 2:
The display is segmented into active and inactive regions during standby mode. The data driver is further segmented to operate only on the necessary data lines for the active region, allowing the system to maintain display functionality where needed while conserving power in inactive areas
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces the driving time of the data driver and overall power consumption, extending battery life in portable devices by minimizing unnecessary power usage during standby mode.
Implementation Method 1
organic light emitting diodes (OLED) that generate light by re-combination of electrons and holes generated to correspond to the flow of current
Data Source
AI summary
An organic light emitting display capable of reducing power consumption in a standby mode and a method of driving the same. The organic light emitting display includes a pixel unit having a first emission region and a second emission region, wherein the pixel unit is configured to generate a driving current in accordance with data signals and scan signals to emit light so that light is emitted by the pixel unit only in the first emission region in a standby mode, a data driver for transmitting the data signals only to the first emission region in the standby mode, a scan driver for outputting the scan signals, and a power source supplier for generating and outputting voltages of an initialization power source and for blocking the driving current from flowing to the second emission region by utilizing a voltage of the initialization power source in the standby mode.