OLED Standby Power Reduction via Region-Specific Data Signaling
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Solution Overview
Problem
Organic light emitting display devices consume excessive power in both driving and standby modes due to constant data signal application across all pixel units, necessitating a method to minimize power consumption.
Innovation Solution
The method involves displaying an image only in the standby mode display region of the pixel unit while keeping the remaining region black, using a scanning signal to differentiate between display and non-display regions, and employing an inspecting unit to supply a black data signal to non-display regions, along with stopping power supply to the data driver buffer during standby mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a data signal in response to one screen is applied to all pixel units, then the display can show fixed information correctly, but power consumption of the data driver increases in standby mode
Solution Approach 1:
The pixel units are divided into two groups: those in the standby mode display region and those in the standby mode non-display region. Different data signals are applied to each group - the standby display region receives data signals corresponding to the fixed image, while the standby non-display region receives data signals corresponding to black images. This segmentation allows the data driver to reduce power consumption by limiting active data signal generation to only the necessary pixel units.
Solution Approach 2:
Different regions of the display have different functional requirements during standby mode. The standby mode display region requires active data signaling to maintain the fixed image, while the standby mode non-display region requires black image signaling to minimize power consumption. This local differentiation of data signal quality enables selective power management within the data driver.
2Reliability
If the data driver continuously supplies data signals to all pixel units, then complete image display is maintained, but overall power consumption increases unnecessarily
Solution Approach 1:
The patent extracts the unnecessary data signal generation for the standby non-display region by introducing a separate inspecting unit that supplies black image data signals to those pixel units. This extraction allows the main data driver to focus only on generating data signals for the standby display region, thereby reducing overall power consumption while maintaining complete image display functionality.
Solution Approach 2:
Instead of supplying data signals to all pixel units, the system applies partial action by limiting full data signal generation to only the standby display region. The standby non-display region receives a simplified black image data signal from the inspecting unit, which is sufficient for its function but consumes less power than full data signal generation would require.
Data Source
AI summary
A method for driving an organic light emitting display device that is able to minimize power consumption while in a standby mode. In order to decrease power consumption during standby mode, only a portion of the display corresponding to the standby mode display area displays an image while in standby mode, and a remainder of the image producing display displays black. The method includes sequentially supplying a scanning signal to the standby mode display region and the standby mode non-display region, supplying a data signal in response to the image in a data driver when supplying the scanning signal to the standby mode display region and supplying the data signal in response to a black image from an inspecting unit while supplying the scanning signal to the standby mode non-display region.