OLED Display Control Unit Pulse Width Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic electro luminescence displays face challenges in reducing power consumption and improving picture quality due to high electric current requirements, which increase production costs and can cause driving interruptions.
Innovation Solution
The solution involves an organic electro luminescence display with a control unit that adjusts the pulse width of the light emission control signal based on the sum of video data inputted per frame, limiting electric current capacity and generating a black data signal when frame data exceeds a predetermined value, thereby controlling the luminance range and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a power supply unit that allows high electric current is used to increase luminance and improve picture quality, then the luminance and contrast are improved, but the production cost increases and driving interruptions may occur
Solution Approach 1:
The control unit calculates the sum of video data for the entire frame in advance before driving the pixel units. Based on this pre-calculated sum, the system determines the appropriate luminance range limit and adjusts the pulse width of the light emission control signal beforehand, preventing excessive current demand during actual operation.
Solution Approach 2:
The system dynamically adjusts the pulse width of the light emission control signal based on the calculated frame data sum. When the sum exceeds a predetermined threshold, the pulse width is reduced to limit luminance and prevent excessive current draw, making the system adaptable to different content requirements.
2Illumination intensity
If high electric current is allowed to increase luminance, then picture quality improves, but power consumption increases
Solution Approach 1:
The control unit continuously monitors the sum of video data for each frame and uses this feedback to adjust the pulse width of the light emission control signal. This closed-loop control ensures that luminance is optimized while preventing excessive power consumption by adjusting the driving parameters based on actual content requirements.
Solution Approach 2:
The system changes the pulse width parameter of the light emission control signal based on the frame data sum. By adjusting this temporal parameter rather than increasing voltage or current capacity, the system achieves optimal luminance while controlling power consumption.
3Illumination intensity
If the pulse width of the light emission control signal is increased to improve luminance, then brightness increases, but electric current capacity requirements increase
Solution Approach 1:
The system pre-calculates the sum of video data for the entire frame and determines the appropriate pulse width before driving the pixel units. This preliminary calculation allows the system to achieve the necessary brightness using minimal current capacity by optimizing the pulse width based on actual content requirements.
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, enhances contrast and visibility by adjusting brightness differences between grey levels, preventing excessive electric current load on the power supply unit and minimizing glaring.
Implementation Method 1
The organic light emitting diodes emit light by coupling of electrons with holes
Data Source
AI summary
Disclosed are an organic electro luminescence display and a driving method of the same. The present invention provides an organic electro luminescence display including a pixel unit for displaying an image to correspond to a scan signal, a light emission control signal and a data line. The image is composed of a plurality of frames. The organic electro luminescence display of the present invention includes a scan driver for supplying the scan signal and the light emission control signal to the pixel unit, a data driver for generating a data signal with a video data to supply the generated data signal to the pixel unit, a control unit for controlling a pulse width of the light emission control signal using a frame data which is the sum of the video data inputted to one frame and controlling one frame time according to the size of the frame data, and a power supply unit for supplying a first power and a second power to the pixel unit.