Liquid Crystal Display Driving Method Reducing Image Blurring
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Solution Overview
Problem
In liquid crystal display (LCD) technology, the blurring of moving images due to liquid crystal reorientation is not adequately addressed by existing impulse driving methods, which increase power consumption and electromagnetic interference, and complicate internal circuits.
Innovation Solution
A method for driving liquid crystal displays that involves a signal controller dividing image data into sets, delaying some data, and applying charge sharing voltages as impulse voltages to multiple pixel rows during delayed times, while maintaining a common voltage, to reduce blurring without increasing data transmission frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If impulse driving method is used to reduce image blurring, then image quality is improved, but power consumption increases and electromagnetic interference increases
Solution Approach 1:
The patent segments image data into multiple sets and processes different pixel rows at different times. By dividing the display into multiple scanning passes with selective impulse voltage application, the system achieves reduced blurring only where needed rather than applying impulse driving to all pixels continuously, thereby reducing overall power consumption while maintaining image quality.
Solution Approach 2:
The patent applies impulse voltages selectively to specific pixel rows during specific time periods rather than uniformly to all pixels. This localized application of impulse driving reduces electromagnetic interference and power consumption while maintaining image quality in the regions where it is most needed.
2Manufacturing precision
If impulse driving method is used to reduce image blurring, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent simplifies device complexity by segmenting the impulse driving operation into manageable components: data division into sets, selective row selection, and timed voltage application. This modular approach makes the control logic more manageable and reduces the complexity of internal circuits compared to traditional continuous impulse driving.
Solution Approach 2:
The patent employs periodic scanning with selective impulse voltage application at specific intervals rather than continuous impulse driving. This periodic action reduces the burden on internal circuits while maintaining the blurring reduction effect, as the system only needs to generate and manage impulse signals at discrete time points during the scanning process.
3Adaptability or versatility
If data transmission frequency is increased to accommodate black image data for impulse driving, then impulse driving capability is improved, but power consumption increases and electromagnetic interference increases
Solution Approach 1:
The patent extracts the black image data requirement from the main data stream by generating impulse voltages directly through selective data line connection during blanking periods. This eliminates the need to transmit separate black image data at increased frequency, thereby avoiding the associated power consumption and electromagnetic interference while maintaining impulse driving capability.
Solution Approach 2:
The patent enables the data driver to generate impulse voltages autonomously by connecting data lines to each other during specific time periods, without requiring external black image data transmission. This self-service mechanism reduces the data transmission burden and associated power consumption while maintaining the ability to perform impulse driving for blurring reduction.
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 minimizes image blurring, reduces power consumption, and simplifies signal synchronization, enabling high-resolution displays with reduced electromagnetic interference and internal circuit complexity.
Implementation Method 1
a liquid crystal (LC) layer having dielectric anisotropy between the two panels
Implementation Method 2
a liquid crystal (LC) layer having dielectric anisotropy between the two panels
Implementation Method 3
voltages are applied to two electrodes to generate an electric field in the LC layer, the strength of which changes the transmittance of light passing through the LC layer
Data Source
AI summary
A liquid crystal display and a driving method therefor comprises a plurality of pixels arranged in a matrix; data lines and gate lines connected to the pixels; a signal controller processing first image data and a plurality of control signals from an external device and transmitting the processed first image data and control signals; and a data driver connected to the signal controller, wherein the signal controller divides the first image data into and sequentially processes a plurality of sets respectively including the first image data for at least two pixel rows, while delaying the remaining image data excluding the last image data among the first image data of each of the sets, and the data driver applies a charge sharing voltages as impulse voltages to the predetermined number of pixel rows during the delayed time, thereby displaying impulse images. In this way, since impulse images are displayed only by delaying image data within the same time and separate black image data are not transmitted, the data transmission frequency is not increased.