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A voltage control method for an electrochromic device

A technology of electrochromic devices and voltage control methods, applied in instruments, nonlinear optics, optics, etc., can solve problems such as large instantaneous pressure difference, inability to stabilize the intermediate state, large instantaneous current, etc., and achieve the effect of prolonging life

Active Publication Date: 2021-06-11
安徽威迪智能玻璃有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This driving method has the following problems: at the moment when the device switches from coloring to fading, a large instantaneous voltage difference will be formed on both sides of the device, resulting in a large instantaneous current, which may cause a local short circuit in the electrochromic device, resulting in white halo in appearance
This driving method has the following problems: 1. It is difficult to maintain the transmittance of the electrochromic device at a certain level
Because the coloring voltage is continuously applied, the transmittance of the device will always drop to the minimum and then maintain, and cannot be stabilized in an intermediate state

Method used

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  • A voltage control method for an electrochromic device
  • A voltage control method for an electrochromic device

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Embodiment Construction

[0032] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] The voltage control of the electrochromic device includes two parts, the coloring process and the fading process, both of which are driven by pulse voltage. Whether it is the initial driving of the electrochromic device, or the switching between coloring and fading, or the switching from fading to coloring, the moment of voltage application or switching, the voltage should be gradually increased from 0 or a value much smaller than the driving voltage. Absolute value to start with.

[0034] refer to figure 1 , the specific steps of the voltage control method of the present invention are as follows:

[0035] 1) Coloring process:

[0036] Send a coloring pulse voltage signal to the electrochromic device;

[0037] The first segment voltage at t 0 time from the starting voltage V 0 step up to the initial voltage V 1 , then at V 1 mai...

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Abstract

The invention provides a voltage control method of an electrochromic device. Both the coloring process and the fading process are driven by a pulse voltage, and the pulse voltage is applied instead of a continuous voltage to maintain the coloring and fading state of the electrochromic device, which can effectively use the electric current. The memory effect of the electrochromic device itself, in the same working time, the device driven by the pulse voltage, the film layer withstand voltage time will be much shorter than the device driven by the continuous voltage, and the life of the electrochromic device is the same as that of the film layer. The time of the voltage is related, so the pulse driving can effectively prolong the life of the device.

Description

technical field [0001] The invention relates to the field of electrochromic technology, in particular to a voltage control method of an electrochromic device. Background technique [0002] Electrochromism refers to the doping and dedoping of charged ions and materials under the action of an applied voltage, which leads to oxidation or reduction reactions of metal oxide electrochromic materials, and then the optical properties (transmittance, absorptivity, Reflectance) is a phenomenon that reversibly changes in the visible and infrared regions. The electrochromic glass prepared by using this property can intelligently control and adjust the transmittance of visible light and infrared rays from sunlight through the glass, selectively adjust the infrared radiation entering the room, and reduce the cooling effect of buildings in summer. Air conditioning energy consumption required. [0003] Electrochromic devices are generally driven with a DC voltage below 3V. Therefore, whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/163
CPCG02F1/163
Inventor 赵勇米赛杨勇王忠禹
Owner 安徽威迪智能玻璃有限公司
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