OLED Display Light Emission Time Control via Pixel Grouping
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Solution Overview
Problem
Conventional organic light emitting displays experience errors in light emission drive time due to uniform light emission times being applied to all pixel circuits, regardless of their data values, leading to inefficient power consumption and brightness control.
Innovation Solution
An organic light emitting display system that includes an image signal processor, frame data analysis unit, light emission time supply unit, and light emission control driver, which processes analog image data to output digital data and determines individual light emission times for each pixel circuit by comparing current and previous data values, reducing errors in light emission drive time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uniform light emission time is applied to all pixel circuits, then power consumption control is simplified, but light emission drive time error occurs and brightness control precision deteriorates
Solution Approach 1:
The patent segments the light emission time control by dividing pixel circuits into different groups based on their data values. Instead of applying a uniform light emission time to all pixels, the system calculates separate light emission times for different pixel groups, thereby resolving the drive time error while maintaining manageable power consumption control through grouped segmentation.
Solution Approach 2:
The patent implements local quality by assigning different light emission time characteristics to different regions or groups of pixel circuits based on their specific data values. This allows each pixel group to receive optimized light emission timing tailored to its brightness requirements, improving precision without requiring completely individualized control for each pixel.
2Measurement precision
If individual light emission time control is implemented for each pixel circuit, then brightness control precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the control of multiple pixel circuits into grouped units rather than controlling each pixel individually. By combining pixels with similar brightness requirements into the same control group, the system achieves improved brightness precision for each pixel while reducing the overall control complexity through consolidation of control signals and timing parameters.
Solution Approach 2:
The patent creates universal control groups that can handle multiple pixel circuits with different data values using a standardized control mechanism. Each control group serves multiple pixels simultaneously, providing precise individual brightness control while maintaining a universal, reusable control structure that reduces system complexity through multi-functionality.
3Illumination intensity
If analog drive method with PAM is used, then brightness modulation is continuous, but power consumption increases and efficiency decreases
Solution Approach 1:
The patent employs periodic action by using pulse width modulation with distinct light emission periods and non-emission periods. Instead of continuous analog modulation through PAM, the system uses periodic on/off cycling of light emission with varying duty cycles, achieving effective brightness control while significantly reducing power consumption by eliminating current flow during non-emission periods.
Solution Approach 2:
The patent applies dynamics by transitioning from static analog voltage levels in PAM to dynamic pulse timing control. The system dynamically adjusts the width and timing of light emission pulses based on brightness requirements, enabling continuous brightness modulation效果 while maintaining low power consumption through the dynamic on/off switching characteristic of digital pulse control.
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 allows for precise control of light emission times, reducing errors and enabling faster data processing by adjusting light emission times based on actual data values, thereby improving brightness control and power efficiency.
Implementation Method 1
A conventional organic light emitting display is a display based upon a principle of selectively emitting light by electrically exciting a fluorescent or phosphorescent compound in organic light emitting diodes (OLEDs)
Implementation Method 2
A conventional organic light emitting display is a display based upon a principle of selectively emitting light by electrically exciting a fluorescent or phosphorescent compound in organic light emitting diodes (OLEDs)
Implementation Method 3
an electron transport layer ETL that transports an electron
Implementation Method 4
a hole transport layer HTL that transports a hole
Implementation Method 5
an electron injecting layer EIL that injects a separate electron
Implementation Method 6
a hole injecting layer HIL that injects a hole
Implementation Method 7
a light emission layer EML that emits light by coupling an electron with a hole
Data Source
AI summary
An organic light emitting display, and an image modification method may include an analog to digital image signal processor configured to output present digital image data, a frame data analysis unit electrically coupled to the image signal processor, the frame data analysis unit configured to receive the present digital image data and a present data summation value, and to output a new data summation value, a light emission time supply unit electrically coupled to the frame data analysis unit and configured to supply a light emission time in accordance with the new data summation value, and a light emission control driver electrically coupled to the light emission time supply unit and configured to output a light emission signal in accordance with the light emission time output from the light emission time supply unit.