Faster addressing of electrochromic displays
First Claim
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1. In an electro-optical display device which contains a plurality of elements, each of said elements comprising a light transmitting substrate with a persistent electrochromic material as a light modulating material, a counter-electrode, and an ion conductive material in contact with said electrochromic material and said counter-electrode, an improved method to sequentially address each element comprising:
- 1. providing means for a pulse of direct current, and2. one capacitor per element with said capacitor being in parallel connection with said element and the counter-electrode to transfer said pulse to the element for a fixed limited time interval, wherein the transfer interval is sufficiently long so as to accomplish writing or erasing of said element and the transfer interval occurs independently of the addressing.
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Abstract
Disclosed is an electrochromic data display and imaging device which may be formed by sandwich arrangement of an imaging area and a counter-electrode area with a suitable ion-conducting layer between, having a line of a plurality of alpha-numeric characters, and circuit means for improving the addressing speed of the device.
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3 Claims
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1. In an electro-optical display device which contains a plurality of elements, each of said elements comprising a light transmitting substrate with a persistent electrochromic material as a light modulating material, a counter-electrode, and an ion conductive material in contact with said electrochromic material and said counter-electrode, an improved method to sequentially address each element comprising:
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1. providing means for a pulse of direct current, and 2. one capacitor per element with said capacitor being in parallel connection with said element and the counter-electrode to transfer said pulse to the element for a fixed limited time interval, wherein the transfer interval is sufficiently long so as to accomplish writing or erasing of said element and the transfer interval occurs independently of the addressing. - View Dependent Claims (2, 3)
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Specification