Electrowetting driving system and control method thereof

Abstract

The invention discloses an electrowetting driving system. According to the electrowetting driving system of the invention, a main control circuit, a row driving unit, a column driving unit and a powersource circuit are utilized to realize the driving of an electrowetting display screen; the row driving unit and the column driving unit each comprise a bistable state driving circuit, a charge pumpboost control circuit and a charge pump circuit, so that the technical problem of failure to realize multi-grayscale display due to a low driving voltage in an existing electrowetting display system can be solved; the charge pump boost control circuit and the charge pump circuit can boost the driving voltage of the electrowetting display screen, increase the aperture ratio of the electrowetting display screen and realize the multi-grayscale display of the electrowetting display screen. The invention also provides a control method of the electrowetting driving system. According to the electrowetting driving system and the control method thereof, the number of repetitions of pulses in each phase in pulse driving waveforms is adjusted, so that the multi-grayscale display of the electrowettingdisplay screen can be realized, and the number of the repetitions of the pulses range from 0 to 40; a defect that an existing driving method fails to achieve multi-grayscale display can be eliminated, the aperture ratio of the electrowetting display screen is improved, and multi-grayscale display is realized.

Description

technical field [0001] The invention relates to the field of electrowetting, in particular to an electrowetting driving system and a control method thereof. Background technique [0002] Electrowetting: Electrowetting (EFD) display technology is a reflective display technology. In the case of no electric field applied to the device, the dyed non-polar liquid in the device covers the entire pixel unit; the pixel unit displays the color of the polar liquid. Under the condition of applying an appropriate electric field, the non-liquid inside the device shrinks to open the pixel unit, forming a display state; the pixel unit displays the white color of the substrate. [0003] In the electrowetting display technology, the ink is used as the second fluid (non-polar liquid) of the electrowetting system, and the filled water is used as the first fluid (polar liquid) of the electrowetting system. The first fluid and the second Fluids are immiscible with each other. Under the action...

AI Technical Summary

Problems solved by technology

The pulse gray-scale modulation method combined with the amplitude gray-scale modulation method is used to realize the 8-level gray-scale driving system of electrowetting electronic paper, but its hardware switch is a binary selector, which can only output 2 kinds of amplitudes, which cannot completely solve the problem of electrowetting electronic paper. Wetting multi-grayscale display problem

[0005] In addition, mature electrophoretic electronic paper technology is also used to realize the gray scale display of electrowetting electronic paper, but there are also shortcomings, that is, the driver IC can only provide a maximum voltage value of 30V, and the 30V voltage value is applied to the electrowetting electronic paper system. It cannot make the electrowetting ink reach the maximum opening ratio, that is, it cannot reach the maximum gray scale, and it only achieves 4 gray scales

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