OLED Display Driving Method Reducing Power via Periodic Black Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large organic light emitting diode (OLED) displays face issues with incorrect image display operations and increased driving power consumption due to high driving frequency, leading to increased costs and RC-delay in display panels.
Innovation Solution
A method that reduces driving frequency by dividing the frame period into a first viewpoint image display period, a second viewpoint image display period, and a black image display period, with the black image display period being shorter than both, and using a timing controller to generate and supply image data signals that prevent light emission during the black image display period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving frequency is increased to display stereoscopic images with black image display period, then the left-eye and right-eye images can be displayed separately, but the driving power consumption is increased and incorrect image display operations occur
Solution Approach 1:
The patent applies periodic action by dividing the frame period into alternating light-emitting periods and black image display periods. This periodic structure allows the OLED pixels to emit light for stereoscopic image display during light-emitting periods and remain off during black image display periods, enabling separate left-eye and right-eye image display while controlling power consumption through timed off-states.
Solution Approach 2:
The patent implements dynamics by making the black image display period adjustable and shorter than the light-emitting periods. This dynamic parameter adjustment allows optimization of the balance between stereoscopic display performance and power consumption, avoiding fixed high-frequency driving that causes excessive power consumption and display errors.
2Reliability
If the driving frequency is increased to display stereoscopic images, then the left-eye and right-eye images can be displayed separately, but RC-delay and erroneous operations in the display panel occur
Solution Approach 1:
The patent uses periodic action with alternating light-emitting and black image display periods, where the black image display period is shorter than the light-emitting periods. This periodic structure enables stereoscopic display functionality while operating at lower effective frequencies during black periods, reducing RC-delay and preventing erroneous operations caused by excessively high continuous driving frequencies.
Solution Approach 2:
The patent applies dynamics by implementing an adjustable black image display period that is shorter than the light-emitting periods. This dynamic parameter allows the system to optimize the balance between achieving stereoscopic display functionality and maintaining reliable operation by avoiding sustained high-frequency driving that causes RC-delay and display errors.
3Use of energy by moving object
If the black image display period is made shorter, then the power consumption is reduced and driving frequency is lowered, but the effectiveness of preventing crosstalk may be compromised
Solution Approach 1:
The patent implements periodic action with alternating light-emitting and black image display periods, where the black image display period is specifically designed to be shorter than the light-emitting periods. This creates a rhythm of light emission and darkness that prevents crosstalk between left-eye and right-eye images while reducing overall power consumption compared to continuous high-frequency driving with equal-period black intervals.
Solution Approach 2:
The patent applies dynamics by making the black image display period adjustable and shorter than the light-emitting periods. This dynamic parameter optimization allows the system to achieve effective crosstalk prevention with minimized power consumption, avoiding the need for equally long or longer black periods that would waste energy while still maintaining stereoscopic display quality.
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 approach reduces power consumption, decreases module production costs, and minimizes RC-delay and erroneous operations in the display panel, allowing for low-speed operation and effective stereoscopic image display.
Implementation Method 1
The organic light emitting diode (OLED) generates light of a predetermined luminance corresponding to a data current supplied from a pixel circuit
Data Source
AI summary
A display device includes a scan driver transmitting a plurality of scan signals to a plurality of scan lines, a data driver transmitting a plurality of data signals to a plurality of data lines, a display unit including a plurality of pixels connected to corresponding scan lines and corresponding data lines, and respectively receiving the corresponding data signal when the plurality of pixels are selected with the corresponding scan signal, and a timing controller controlling the scan driver and the data driver, dividing one frame period into a first viewpoint image display period, a second viewpoint image display period, and a black image display period, and generating image data signals corresponding to the first viewpoint image display period, the second viewpoint image display period, and the black image display period, and supplying the respective image data signals to the data driver, wherein the black image display period is shorter than the first viewpoint image display period and the second viewpoint image display period, and the image data signal corresponding to the black image display period is a black image data signal controlling the plurality of pixels not to emit light.