DRIVING DEVICE AND DRIVING METHOD OF ELECTROPHORETIC DISPLAY

Abstract

A driving device of an electrophoretic display panel having a common electrode and a plurality of divided electrodes disposed opposite to the common electrode includes: a first driving circuit that outputs a plurality of voltages corresponding to a plurality of voltage data supplied as a series of data and supplies the plurality of voltages to the plurality of divided electrodes; and a second driving circuit that outputs a voltage corresponding to supplied data and supplies the voltage to the common electrode.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements, and wherein:

FIG. 1A is a view explaining an electrophoretic display panel.

FIG. 1B is a view explaining an example in which a voltage is applied to segment electrodes and a common electrode.

FIG. 2 is a view explaining a driving device of an electrophoretic display panel in a comparative example.

FIG. 3 is a circuit diagram illustrating an example of the configuration of an input interface unit and an EPD driving unit of a driving device.

FIG. 4 is a circuit diagram illustrating an example of the configuration of a ternary output circuit.

FIG. 5 is a timing chart illustrating various signals used to explain an operation in the comparative example.

FIG. 6 is a view explaining a driving device of an electrophoretic display panel in an embodiment.

FIG. 7 is a circuit diagram illustrating an example of the configuration of an input interface unit and an EPD driving unit of a driving device according to a first embodiment.

FIG. 8 is a timing chart illustrating various signals used to explain an operation in the first embodiment.

FIG. 9 is a timing chart of related signals explaining an example of setting a voltage applied to a common electrode by using an SCOM signal.

FIG. 10 is a view explaining a second embodiment.

FIG. 11 is a view explaining an operation in the second embodiment.

Claims

1. A driving device of an electrophoretic display panel having a common electrode and a plurality of divided electrodes disposed opposite to the common electrode, comprising: a first driving circuit that outputs a plurality of voltages corresponding to a plurality of voltage data supplied as a series of data and supplies the plurality of voltages to the plurality of divided electrodes; anda second driving circuit that outputs a voltage corresponding to supplied data and supplies the voltage to the common electrode.

2. The driving device of the electrophoretic display panel according to claim 1, wherein the first driving circuit includes a series-to-parallel data conversion circuit serving to convert supplied serial data to parallel data and a plurality of voltage output circuits serving to generate voltages of levels corresponding to a plurality of data converted to the parallel data, andthe second driving circuit includes a voltage output circuit serving to generate a voltage of a level corresponding to supplied data.

3. The driving device of the electrophoretic display panel according to claim 1, wherein the divided electrodes are segment electrodes used to display all or a part of display pattern or pixel electrodes arranged in a two-dimensional manner.

4. The driving device of the electrophoretic display panel according to claim 1, wherein the second driving circuit inverts a voltage applied to the common electrode in correspondence with the supplied data a plural number of times.

5. The driving device of the electrophoretic display panel according to claim 2, wherein the series-to-parallel data conversion circuit includes a shift register stage and a latch stage.

6. The driving device of the electrophoretic display panel according to claim 2, wherein the voltage output circuit is a ternary output circuit that outputs one of high impedance, high voltage level, and low voltage level in response to an input.

7. A driving method of an electrophoretic display panel having a common electrode and a plurality of divided electrodes disposed opposite to the common electrode, comprising: outputting a plurality of voltages corresponding to a plurality of voltage data supplied as a series of data and supplying the plurality of voltages to the plurality of divided electrodes; andoutputting a voltage corresponding to supplied data and supplying the voltage to the common electrode.