Electronic paper, display device and driving method

Abstract

The embodiment of the invention provides electronic paper, a display device and a driving method. A first driving back plate is provided with a plurality of first half-cup structures, and each first half-cup structure is internally provided with charged dye particles with single electrical property; a second driving back plate is provided with a plurality of second half-cup structures, and each second half-cup structure is internally provided with charged dye particles with single electrical property; one first half-cup structure and one opposite second half-cup structure form a micro-cup structure, and the first half-cup structure and the second half-cup structure in the same micro-cup structure have opposite electric properties of charged dye particles; wherein in the direction from thesecond driving back plate to the first driving back plate, the sectional area of the second half-cup structure is gradually reduced; and in the direction from the first driving back plate to the second driving back plate, the sectional area of the first half-cup structure is gradually reduced.

Description

technical field [0001] The present disclosure relates to the field of display technology, and in particular to an electronic paper, a display device and a driving method. Background technique [0002] The electronic paper display technology in the prior art mainly utilizes the principle of Electrophoretic Display (EPD) to drive two kinds of electrically dyed particles to move back and forth, so that the color of the particles is displayed on the display side. After the power is turned off, the particles can remain in place, exhibiting a "steady state." Among them, the more common ones are black (positive charge), white (negative charge) and red (positive charge) three-color heteroelectric mixed display products. However, in the electronic paper of the prior art, since the heteroelectric dyed particles are distributed in the same microcup / microcapsule, there is a built-in attractive electric field formed by positive and negative particles, which inevitably reduces the displa...

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Problems solved by technology

[0003]Concretely, the traditional dual-electricity EPD display products mainly have the following defects: First, the defect of maintaining the purity of the picture (for example, the white picture is gradually reduced due to the attraction of the lower layer of heteroelectric red particles). Forming a picture with white mixed with red), it often needs to be refreshed every day, which violates the original design intention of "steady state" of electronic paper products; The electronic paper needs to be fully activated when the screen is refreshed, so it is necessary to maintain a sufficient moving distance of the activated particles, that is, the height of the microcup, but the increase of the electrophoretic distance will inevitably prolong the driving time, which is aimed at balancing the long-term reversal of the built-in electric field and The activation process increases the screen refresh time and power consumption; thirdly, the display utilization rate of the particles is low, and only the particles on the display side (top of the cup) are used for display, and the particles on the back display side (bottom of the cup) cannot play a role at all. Significant effect (the utilization rate of particles is only 50%)

In the final analysis, traditional electronic paper has the problems of poor screen purity retention, long drive time for screen refresh, high power consumption, and low utilization rate of particles.

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