Ink Screen Driving Waveform Lookup for Low Temperature Grayscale Compensation
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Solution Overview
Problem
Ink screen devices face challenges in maintaining refresh speed and accurate grayscale display in low temperature environments, where the viscosity of particles increases, leading to insufficient movement and lighter displayed grayscales, and existing compensation methods are time-consuming and inefficient compared to LCD screens.
Innovation Solution
The proposed solution involves an ink screen reading device and method that acquires the current temperature, compares it to a preset value, and adjusts the lookup table accordingly to obtain a driving waveform, using a higher temperature value when low to improve refresh speed and prevent grayscale lightening, while ensuring adequate grayscale restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the driving voltage is increased to compensate for particle movement in low temperature environments, then the grayscale display accuracy is improved, but the refresh time is extended
Solution Approach 1:
The patent changes the temperature parameter used for waveform lookup from the actual temperature to a compensated temperature value. When actual temperature is below the threshold, a higher compensated temperature is selected, which corresponds to lower driving voltage parameters in the lookup table, thus reducing refresh time while maintaining grayscale accuracy through the temperature compensation mechanism
2Manufacturing precision
If the pulse width and number of pulses are increased to compensate for particle movement in low temperature environments, then the grayscale display accuracy is improved, but the refresh speed is reduced
Solution Approach 1:
The patent applies parameter changes by selecting a compensated temperature value higher than the actual temperature when the actual temperature is low. This compensated temperature is then used to lookup the driving waveform parameters (pulse width, number of pulses, voltage amplitude) from the temperature-waveform correspondence table, thereby optimizing the driving parameters to maintain grayscale accuracy while improving refresh speed
3Manufacturing precision
If the driving voltage is increased to compensate for particle movement in low temperature environments, then the particle movement distance is improved, but the refresh speed is reduced
Solution Approach 1:
The patent changes the temperature parameter used for waveform selection from the actual low temperature to a compensated higher temperature. This compensated temperature value corresponds to driving waveforms with lower voltage amplitudes, shorter pulse widths, and fewer pulses in the lookup table, thereby reducing the driving effort needed while ensuring particles achieve sufficient movement distance, thus improving refresh speed
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 enhances the refresh speed and maintains accurate grayscale display in low temperature environments by using a higher temperature value for waveform lookup, thereby improving user experience and balancing grayscale restoration with refresh speed.
Implementation Method 1
acquiring a current temperature value of the screen
Implementation Method 2
each microcapsule contains multiple black particles and multiple white particles which have opposite charges. When black content needs to be displayed on the screen, the black particles are driven by a voltage to move up to the top of the screen
Implementation Method 3
Material properties of the ink screen itself will make particles to produce higher 'viscosity' in low temperature environments, which causes movement distances of the particles are insufficient
Data Source
AI summary
The disclosure relates to an ink screen reading device, a screen driving method thereof and a storage medium. The method comprises: acquiring a current temperature value of a screen; judging whether the current temperature value is lower than a preset first temperature value; in condition that the current temperature value is lower than the first temperature value, choosing a second temperature value and looking up a preset table according to the second temperature value and grayscale values of content to be displayed to obtain a waveform of the screen; in condition that the current temperature value is higher than or equal to the first temperature value, looking up the table according to the current temperature value and the grayscale values of content to be displayed to obtain the waveform of the screen; and driving the screen by the waveform to display the content to be displayed.