OLED Display Driving Method for 3D Brightness Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional organic light emitting displays face challenges in achieving uniform brightness when displaying 3D images due to time differences between frame fields, leading to non-uniform image display and increased manufacturing costs from additional hardware requirements for synchronizing signals.
Innovation Solution
A method of driving organic light emitting displays by dividing each frame into two fields, where the second field of one frame is set to display black, and different voltages are supplied to pixels in specific fields to ensure uniform brightness, utilizing a timing controller to generate and control scan, data, and power signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the second field of one frame is set to display black to compensate for timing differences, then uniform brightness is achieved, but display quality deteriorates due to black display periods
Solution Approach 1:
The patent applies preliminary action by setting the second field of odd frames to black in advance, before the actual image display begins. This preemptive measure compensates for the timing difference between fields by pre-establishing the black display period, ensuring that when the image display starts, the brightness uniformity is already corrected without requiring additional real-time adjustment mechanisms.
2Measurement precision
If additional hardware is included in the panel to manage synchronizing signals, then timing control is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies self-service by enabling the panel to generate its own horizontal and vertical synchronizing signals internally using a counter that counts DE signals, rather than requiring external hardware to provide these signals. The panel's timing controller autonomously creates the necessary synchronization signals by counting the data enable signals and generating Hsync and Vsync signals accordingly, eliminating the need for additional external hardware components.
3Device complexity
If DE signals are counted to generate synchronizing signals, then hardware complexity is reduced, but timing accuracy deteriorates due to count signal variations
Solution Approach 1:
The patent applies feedback by implementing a timing controller that continuously counts DE signals and uses these count values to dynamically generate Hsync and Vsync signals. The counter provides feedback information about the current DE signal position, which the timing controller uses to adjust and synchronize the output signals. This feedback mechanism ensures timing accuracy despite the simplified hardware architecture, as the system self-corrects based on real-time counting data.
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 the generation of light components with consistent duration across all fields, resulting in an image with uniform brightness and reduced manufacturing costs by eliminating the need for additional hardware to manage synchronizing signals.
Implementation Method 1
The organic light emitting diode displays display images using OLEDs that generate light through the re-combination of electrons and holes
Data Source
AI summary
An organic light emitting display and method of driving the display are disclosed. The display is driven with an ith frame and an (i+1)th frame, wherein the (i+1)th frame has a shorter duration than the ith frame. The driving signals for the display are adjusted so that the apparent brightness of the frames is substantially equal.