Display Device Overlapping Data Writing and Light Emission Periods
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Solution Overview
Problem
Current display technologies face challenges in achieving accurate and uniform luminance for 3D stereoscopic images due to limitations in data writing and light emission periods, leading to increased power consumption and non-uniformity, especially in high-speed driving modes.
Innovation Solution
The proposed solution involves a display device and method where each pixel receives a first voltage for resetting and compensating the threshold voltage, followed by simultaneous data writing and light emission periods, allowing for sufficient time for data initialization and light emission, even in high-speed frames, using a simplified pixel circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data writing and light emission periods are extended to ensure accurate luminance, then manufacturing precision and image quality improve, but productivity and frame rate decrease
Solution Approach 1:
The patent merges the data writing period and light emission period into a simultaneous overlapping period. During this time, data is being written to the storage capacitor while the light emitting diode simultaneously emits light based on the previous frame's data. This time-overlapping approach allows both operations to occur without sequential delay, maintaining luminance accuracy while preserving high frame rates.
Solution Approach 2:
The patent applies preliminary action by preparing the data voltage for the current frame in advance during the data writing period, while the light emission for the previous frame is already in progress. The storage capacitor stores the data voltage before the light emission period begins, ensuring that when light emission starts, the necessary data is ready, allowing simultaneous operation without compromising either operation's timing requirements.
2Reliability
If reset period is extended to ensure proper voltage initialization, then reliability improves, but loss of time increases
Solution Approach 1:
The reset operation is performed as a preliminary action immediately at the beginning of the frame period, before any data writing or light emission occurs. By completing the reset and voltage initialization as early as possible, the patent ensures reliable voltage initialization while minimizing the time lost to resetting, as the reset period is condensed into the earliest possible moment of the frame cycle.
3Manufacturing precision
If threshold voltage compensation is performed simultaneously for all pixels, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The patent implements a universal threshold voltage compensation mechanism that operates simultaneously for all pixels through a shared compensation capacitor connected to the data line. Instead of requiring separate compensation circuits for each pixel, a single compensation capacitor serves the entire array, allowing threshold voltage compensation to be performed uniformly across all pixels without increasing per-pixel circuit complexity.
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 ensures uniform and accurate luminance across the display panel by providing adequate time for threshold voltage compensation and data writing, reducing power consumption and improving manufacturing yield while maintaining high-speed frame rates.
Implementation Method 1
emit light by driving current for a fourth voltage corresponding to a second image data signal corresponding to a previous frame
Data Source
AI summary
A display device includes a display panel, the display panel including a plurality of pixels that, during one frame, receive a first voltage transmitted through a data line and a second voltage having a higher level than the first voltage, receive and store a third voltage of a first image data signal corresponding to a current frame, and emit light by driving current for a fourth voltage corresponding to a second image data signal corresponding to a previous frame, wherein, of one frame, a first period for storing the third voltage and a second period for emitting light by the driving current for the fourth voltage overlap each other.