Display drive device and display device
First Claim
1. A display drive device comprising:
- a display element including at least one display electrode and one counter electrode disposed opposite to the display electrode, and an electrolyte between the display electrode and the counter electrode, the display element being colored by injecting an electric charge into the electrolyte via the display electrode due to an oxidation-deoxidization reaction and being decolored by injecting an electric charge having an inverse polarity of the electric charge into the electrolyte;
at least one constant current supply circuit which supplies a constant current as a decoloration current pulse having a predetermined pulse width to the display electrode upon the decoloration and injects the electric charge having the inverse polarity into the electrolyte;
a voltage detection circuit which detects a voltage value generated in the display electrode; and
a control circuit which controls an operation of the constant current supply circuit intermittently and repeatedly supplying the decoloration current pulse from the constant current supply circuit to the display electrode upon the decoloration, and ending the decoloration on the basis of a voltage value to be detected by the voltage detection circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
A display drive device comprises a display element being colored by injecting an electric charge into an electrolyte via an display electrode due to an oxidation-deoxidization reaction and being decolored by injecting an electric charge having an inverse polarity of the electric charge into the electrolyte, at least one constant current supply circuit which supplies a constant current as a decoloration current pulse having a predetermined pulse width to the display electrode upon the decoloration, a voltage detection circuit which detects a voltage value generated in the display electrode, and a control circuit which controls an operation of the constant current supply circuit intermittently and repeatedly supplying the decoloration current pulse from the constant current supply circuit to the display electrode upon the decoloration, and ending the decoloration on the basis of a voltage value to be detected by the voltage detection circuit.
10 Citations
42 Claims
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1. A display drive device comprising:
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a display element including at least one display electrode and one counter electrode disposed opposite to the display electrode, and an electrolyte between the display electrode and the counter electrode, the display element being colored by injecting an electric charge into the electrolyte via the display electrode due to an oxidation-deoxidization reaction and being decolored by injecting an electric charge having an inverse polarity of the electric charge into the electrolyte; at least one constant current supply circuit which supplies a constant current as a decoloration current pulse having a predetermined pulse width to the display electrode upon the decoloration and injects the electric charge having the inverse polarity into the electrolyte; a voltage detection circuit which detects a voltage value generated in the display electrode; and a control circuit which controls an operation of the constant current supply circuit intermittently and repeatedly supplying the decoloration current pulse from the constant current supply circuit to the display electrode upon the decoloration, and ending the decoloration on the basis of a voltage value to be detected by the voltage detection circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A display drive device comprising:
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a display element including at least one display electrode and one counter electrode disposed opposite to the display electrode, and an electrolyte between the display electrode and the counter electrode, the display element being colored by injecting an electric charge into the electrolyte via the display electrode due to an oxidation-deoxidization reaction and being decolored by injecting an electric charge having an inverse polarity of the electric charge into the electrolyte, at least one constant current supply circuit which supplies a constant current as a decoloration current pulse having a predetermined pulse width to the display electrode upon the decoloration and injects the electric charge having the inverse polarity into the electrolyte; a voltage detection circuit which detects a voltage value generated in the display electrode; and a control circuit which controls an operation of the constant current supply circuit intermittently and repeatedly supplying the decoloration current pulse at predetermined supply intervals from the constant current supply circuit to the display electrode upon the decoloration, and ending the supply operation of the decoloration current pulse to the display electrode when the voltage value to be detected by the voltage detection circuit when the decoloration current pulse is not supplied from the constant current supply circuit to the display electrode exceeds a preset first reference value.
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20. A display drive device comprising:
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a display element including at least one display electrode and one counter electrode disposed opposite to the display electrode, and an electrolyte between the display electrode and the counter electrode, the display element being colored by injecting an electric charge into the electrolyte via the display electrode due to an oxidation-deoxidization reaction and being decolored by injecting an electric charge having an inverse polarity of the electric charge into the electrolyte; at least one constant current supply circuit which supplies a constant current as a decoloration current pulse having a predetermined pulse width to the display electrode upon the decoloration and injects the electric charge having the inverse polarity into the electrolyte; a voltage detection circuit which detects a voltage value generated in the display electrode; and a control circuit which controls an operation of the constant current supply circuit repeating the supply operation of the decoloration current pulse from the constant current supply circuit to the display electrode when the voltage value to be detected by the voltage detection circuit reaches a preset second reference value after the decoloration current pulse is supplied from the constant current supply circuit to the display electrode and before a preset determination time has passed upon the decoloration, and ending the supply operation of the decoloration current pulse to the display electrode by the constant current supply circuit when the voltage value to be detected by the voltage detection circuit does not reach the preset second reference value before the first determination time has passed.
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21. A display device, comprising:
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a display unit including at least one display electrode and one counter electrode disposed opposite to the display electrode, and an electrolyte between the display electrode and the counter electrode, and the display unit being colored by injecting an electric charge into the electrolyte via the display electrode due to an oxidation-deoxidization reaction and being decolored by injecting an electric charge having an inverse polarity of the electric charge into the electrolyte; at least one constant current supply circuit which supplies a constant current as a decoloration current pulse having a predetermined pulse width to the display electrode of the display unit upon the decoloration and injects the electric charge having the inverse polarity into the electrolyte; a voltage detection circuit which detects a voltage value generated in the display electrode of the display unit; and a control circuit which controls an operation of the constant current supply circuit intermittently and repeatedly supplying the decoloration current pulse from the constant current supply circuit to the display electrode of the display unit upon the decoloration, and ending the decoloration on the basis of a voltage value of the display electrode to be detected by the voltage detection circuit. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification