OLED Display Driving Voltage Control for Motion Blur Reduction
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Solution Overview
Problem
Conventional hold type displays, such as AMOLEDs, suffer from motion blur due to continuous current supply to pixels during frame periods, leading to blurred images of moving content and reduced display quality.
Innovation Solution
An OLED display apparatus and method that generates a frame-based image data signal and a synchronized frame identification signal, using a switching unit to supply driving voltage only when the frame is not at its starting point, thereby preventing continuous voltage supply and reducing motion blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a capacitor continuously supplies current to each pixel during the entire frame period, then the display maintains stable image holding capability, but motion blur occurs due to afterimage effect
Solution Approach 1:
The patent applies periodic action by controlling the switching unit to supply driving voltage to the display unit in a periodic manner synchronized with the frame rate. The switching unit turns on during specific periods and off during others, creating periodic voltage supply cycles. This periodic control eliminates continuous current flow while maintaining stable image display through timed voltage application, thereby resolving motion blur while preserving image holding capability.
2Stability of the object's composition
If driving voltage is continuously supplied to the display unit, then stable image display is maintained, but motion blur phenomenon occurs in moving images
Solution Approach 1:
The patent implements dynamics by transitioning from static continuous voltage supply to dynamic controlled voltage supply. The switching unit dynamically adjusts the voltage supply state based on timing signals, alternating between on and off states during the frame period. This dynamic control allows the system to adapt voltage supply to display requirements, eliminating motion blur while maintaining stable image display through timed voltage application.
3Reliability
If a switching unit is introduced to control voltage supply based on frame identification signal, then motion blur is reduced, but device complexity increases
Solution Approach 1:
The switching unit serves multiple functions simultaneously: it acts as a voltage control element, a timing synchronization component, and a motion blur elimination mechanism. By integrating these functions into a single component controlled by the frame identification signal, the patent reduces the need for separate control circuits and timing generators, thereby minimizing the increase in device complexity while achieving motion blur reduction.
Data Source
AI summary
An organic light-emitting diode (OLED) display apparatus, including a control unit to receive an image signal and to generate a frame-based image data signal and a frame identification signal based at least in part on the received image signal, the frame identification signal being synchronized with the frame-based image data signal, a driving voltage supply unit to generate a first voltage for a switching unit and a second voltage for a display unit, and a switching unit to receive the first voltage and the frame identification signal and to supply the first voltage for the display unit based at least in part on the frame identification signal.