An electrochromic device with uniform color change
By setting electrodes of the same polarity at the corners of the electrochromic device and creating grooves at the edges of the conductive electrodes, the problems of uneven color-changing speed and current congestion in the electrochromic device are solved, achieving a more uniform color-changing effect and lower power consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LANNRAY ADVANCED MATERIALS CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-07-24
Smart Images
Figure CN224553627U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electrochromic technology, specifically relating to an electrochromic device with uniform color change. Background Technology
[0002] Electrochromic technology refers to the phenomenon where a specific material undergoes a stable and reversible color change when an electric field is applied. When this technology is integrated into a glass system to form an electrochromic device, the device can actively adjust its light transmission or absorption level under the control of an electrical signal, thereby selectively absorbing or reflecting external thermal radiation. With the continuous advancement of electrochromic technology, the application scenarios of electrochromic devices are constantly expanding, placing higher demands on their color-changing effects and response speeds. In practical applications, due to the need to meet different application scenarios, the shapes of the devices vary, and the edge areas of the devices typically include corner areas, straight-edge areas, and curved areas. Under the same current density, the color-changing speed varies in different parts, especially in corner areas ≤180°, where the color-changing speed is faster than other parts of the device, leading to uneven overall color-changing speed. Therefore, optimizing the conductive electrode structure to improve response consistency and achieve a more uniform overall color-changing effect has become one of the key challenges in the design of current electrochromic devices. In electrochromic devices, the placement of conductive electrodes is not only for establishing electrical connections, but also a crucial factor directly affecting the uniformity of color change, power consumption, and operational reliability—essentially their "invisible engine." Different conductive electrode structures and layouts can achieve different functions, meet the needs of various scenarios, and achieve an optimal balance among multiple performance indicators, thereby transforming individual performance advantages into system-level advantages. Therefore, optimizing the structure and layout of conductive electrodes is of great significance for solving inconsistent responses and achieving more uniform color change, lower power consumption, and higher reliability in electrochromic devices. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an electrochromic device with uniform color change, which addresses the shortcomings of the prior art. The conductive electrodes on the two sides at at least one corner of the electrochromic device are electrodes of the same polarity, which can slow down the color change speed of the electrochromic device at that corner, offset the premature coloring caused by "current congestion" in traditional devices, thereby achieving a more uniform color change speed and color change effect of the electrochromic device as a whole, and facilitating the setting of conductive electrodes.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electrochromic device with uniform color change, comprising a first base layer, a first conductive layer, an electrochromic film layer, a second conductive layer and a second base layer stacked sequentially from top to bottom, wherein a plurality of first grooves are provided at intervals on the upper edge of the second conductive layer, and a plurality of second grooves are provided at intervals on the lower edge of the first conductive layer, wherein the first grooves and the second grooves overlap along the edge of the electrochromic device, and wherein at least one corner of the electrochromic device has a first groove in the shape of a bend on its upper side, or a second groove in the shape of a bend on its lower side.
[0005] Preferably, the electrochromic device has a first groove or a second groove simultaneously formed at all corners; in the electrochromic device, the width of each first groove is the same as the width of each second groove, and the number of first grooves is the same as the number of second grooves. In the electrochromic device, both the first groove and the second groove are formed by an edge-cutting process. Specifically, the first groove is obtained by partially cutting the edges of the device semi-finished product, selectively removing parts of the edges of the first substrate layer, the first conductive layer, and the electrochromic film layer; the second groove is obtained by partially cutting the edges of the device semi-finished product, selectively removing parts of the edges of the second substrate layer, the second conductive layer, and the electrochromic film layer. Therefore, the above-mentioned preferred solution ensures uniform color change of the entire device while also having the advantage of a simple grooving process.
[0006] Preferably, the electrochromic device has a first groove or a second groove simultaneously formed at all corners; in the electrochromic device, the width of each first groove is different from the width of each second groove, and the number of first grooves is the same as the number of second grooves. The advantage of this scheme is that the width of the first groove and the second groove has a large degree of design freedom, and the width of the first groove and the second groove can be flexibly adjusted according to the shape of the device, thereby controlling the color-changing speed of different areas of the device.
[0007] Preferably, the electrochromic device has a first groove or a second groove simultaneously formed at all corners; in the electrochromic device, the width of each first groove is not exactly the same as the width of each second groove, and the number of first grooves is different from the number of second grooves. The advantage of this scheme is that the width and number of the first and second grooves have a large degree of design freedom. The first grooves and / or second grooves can be designed to be narrower to increase their number, forming more conductive channels, which helps to improve the overall color uniformity of the device. At the same time, the narrower first and second grooves can make the interlayer adhesion between the first substrate layer and the first conductive layer, and between the second substrate layer and the second conductive layer more stable and reliable, reducing the generation of bonding wrinkles.
[0008] Preferably, the electrochromic device has a first groove at at least one pair of corners and a second groove at the remaining corners; in the electrochromic device, the width of each first groove is not exactly the same as the width of each second groove. The advantage of this solution is that the first and second grooves can be freely designed.
[0009] Preferably, a first bus electrode and a second bus electrode are respectively provided on the upper and lower sides of the edge of the electrochromic device. A portion of the first bus electrode is embedded in at least one first groove and electrically connected to the second conductive layer, and a portion of the second bus electrode is embedded in at least one second groove and electrically connected to the first conductive layer.
[0010] Preferably, the electrochromic device is polygonal in shape.
[0011] Preferably, the electrochromic device is quadrilateral in shape.
[0012] Preferably, the electrochromic device has a first groove in the shape of a bend at each of its four corners, or a second groove in the shape of a bend at each of its four corners.
[0013] Compared with the prior art, the present invention has the following advantages: The electrochromic device of the present invention improves the structure and layout of the conductive electrodes. A first or second groove in the shape of a bend is opened at at least one corner of the electrochromic device, thereby ensuring that the conductive electrodes on the two sides at at least one corner of the electrochromic device are electrodes of the same polarity. This can slow down the color change speed of the electrochromic device at that corner, and counteract the premature coloring caused by "current congestion" in traditional devices. This results in a more uniform color change speed and color change effect of the electrochromic device as a whole, and facilitates the setting of conductive electrodes. Attached Figure Description
[0014] Figure 1 This is a top view of the electrochromic device in Example 1;
[0015] Figure 2 Enlarged Figure 1 AA section diagram;
[0016] Figure 3 Enlarged Figure 1 Middle BB section view;
[0017] Figure 4 (a), (b), and (c) are top views of the locations of the first substrate layer, the electrochromic film layer, and the second substrate layer in Example 1, respectively.
[0018] Figure 5 This is a top view of the electrochromic device in Example 2;
[0019] Figure 6 Enlarged Figure 5 AA section diagram;
[0020] Figure 7 Enlarged Figure 5 Middle BB section view;
[0021] Figure 8 (a), (b), and (c) in Example 2 are top views of the locations of the first substrate layer, the electrochromic film layer, and the second substrate layer, respectively.
[0022] Figure 9 This is a top view of the electrochromic device in Example 3;
[0023] Figure 10 Enlarged Figure 9 AA section diagram;
[0024] Figure 11 Enlarged Figure 9 Middle BB section view;
[0025] Figure 12 (a), (b), and (c) are top views of the locations of the first substrate layer, the electrochromic film layer, and the second substrate layer in Example 3, respectively.
[0026] Figure 13 This is a top view of the electrochromic device in Example 4;
[0027] Figure 14 Enlarged Figure 13 AA section diagram;
[0028] Figure 15 Enlarged Figure 13 Middle BB section view;
[0029] Figure 16 (a), (b), and (c) are top views of the locations of the first substrate layer, the electrochromic film layer, and the second substrate layer in Example 4, respectively.
[0030] The specific reference numerals in the figure are as follows:
[0031] 1-First base layer, 2-First conductive layer, 21-Second groove, 3-Electrochromic film layer, 4-Second conductive layer, 41-First groove, 5-Second base layer, 6-First bus electrode, 7-Second bus electrode, 8-Lead electrode, 9-Notch, 91-First insulating layer, 92-Second insulating layer. Detailed Implementation
[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components or structures not limited in this invention employ conventional techniques in the art.
[0033] The electrochromic device of Example 1, such as Figures 1-4 As shown, an electrochromic device with uniform color change is disclosed. The electrochromic device is quadrilateral in shape and includes a first base layer 1, a first conductive layer 2, an electrochromic film layer 3, a second conductive layer 4, and a second base layer 5 stacked sequentially from top to bottom. A first bus electrode 6 and a second bus electrode 7 are respectively disposed on the upper and lower sides of the edge of the electrochromic device. The first bus electrode 6 and the second bus electrode 7 are respectively electrically connected to an external power supply via lead-out electrodes 8. A plurality of first grooves 41 are disposed at intervals on the upper edge of the second conductive layer 4, and a plurality of second grooves 21 are disposed at intervals on the lower edge of the first conductive layer 2. The first grooves 41 and the second grooves 21 are overlapped along the edge of the electrochromic device. A notch 9 is disposed between adjacent first grooves 41 and second grooves 21. A first insulating layer 91 and a second insulating layer 92 are respectively covered on the upper and lower sides of the notch 9. The two sides of the first insulating layer 91 are respectively attached to the surfaces of the first base layer 1 and the second conductive layer 4, and the two sides of the second insulating layer 92 are respectively attached to the surfaces of the first conductive layer 2 and the second base layer 5.
[0034] In Embodiment 1, a portion of the first bus electrode 6 is embedded in at least one first groove 41 and electrically connected to the second conductive layer 4, and a portion of the second bus electrode 7 is embedded in at least one second groove 21 and electrically connected to the first conductive layer 2. The lower sides of the four corners of the electrochromic device are simultaneously provided with angled second grooves 21, and the corner portions of the second bus electrode are embedded in the two side grooves of each angled second groove. In the electrochromic device, the width W1 of each first groove 41 is the same as the width W2 of each second groove 21, and the number of first grooves 41 and the number of second grooves 21 are both eight.
[0035] The electrochromic device of Example 2 differs from that of Example 1 in that, in Example 2, as... Figures 5-8 As shown, the electrochromic device has two second grooves 21 formed at its four corners; in this electrochromic device, the width W1 of each first groove 41 is different from the width W2 of each second groove 21, and the number of first grooves 41 and the number of second grooves 21 are both eight. The electrochromic device of Embodiment 3 differs from that of Embodiment 1 in that, in Embodiment 3, as shown... Figures 9-12 As shown, the electrochromic device has a second groove 21 at each of its four corners; in this electrochromic device, the width W1 of each first groove 41 is not exactly the same as the width W2 of each second groove 21, and the number of first grooves 41 is different from the number of second grooves 21, wherein there are eight first grooves 41 and twelve second grooves 21.
[0036] The electrochromic device of Example 4 differs from that of Example 1 in that, in Example 4, as... Figures 13-16 As shown, a pair of diagonally opposite corners of the electrochromic device are provided with first grooves 41, and another pair of diagonally opposite corners are provided with second grooves 21. In this electrochromic device, the width W1 of each first groove 41 is not exactly the same as the width W2 of each second groove 21, and the number of first grooves 41 and the number of second grooves 21 are both eight.
Claims
1. A uniformly color-changing electrochromic device, comprising, from top to bottom, a first substrate layer, a first conductive layer, an electrochromic film layer, a second conductive layer, and a second substrate layer, wherein a plurality of first grooves are spaced apart on the upper edge of the second conductive layer, and a plurality of second grooves are spaced apart on the lower edge of the first conductive layer, the first grooves and second grooves overlapping along the edge of the electrochromic device, characterized in that, In the electrochromic device, there is at least one corner where a first groove in the shape of a bend is formed on the upper side, or a second groove in the shape of a bend is formed on the lower side.
2. The electrochromic device with uniform color change according to claim 1, characterized in that, The electrochromic device has a first groove or a second groove at all corners; in the electrochromic device, the width of each first groove is the same as the width of each second groove, and the number of first grooves is the same as the number of second grooves.
3. The electrochromic device with uniform color change according to claim 1, characterized in that, The electrochromic device has a first groove or a second groove at all corners; in the electrochromic device, the width of each first groove is different from the width of each second groove, and the number of first grooves is the same as the number of second grooves.
4. The electrochromic device with uniform color change according to claim 1, characterized in that, The electrochromic device has a first groove or a second groove at all corners; in the electrochromic device, the width of each first groove is not exactly the same as the width of each second groove, and the number of first grooves is different from the number of second grooves.
5. The electrochromic device with uniform color change according to claim 1, characterized in that, The electrochromic device has a first groove at at least one pair of corners and a second groove at the remaining corners; in the electrochromic device, the width of each first groove is not exactly the same as the width of each second groove.
6. The electrochromic device with uniform color change according to any one of claims 1-5, characterized in that, The electrochromic device has a first bus electrode and a second bus electrode respectively disposed on the upper and lower sides of its edge. A portion of the first bus electrode is embedded in at least one first groove and electrically connected to the second conductive layer, and a portion of the second bus electrode is embedded in at least one second groove and electrically connected to the first conductive layer.
7. The electrochromic device with uniform color change according to claim 6, characterized in that, The electrochromic device is polygonal in shape.
8. The electrochromic device with uniform color change according to claim 7, characterized in that, The electrochromic device is quadrilateral in shape.
9. The electrochromic device with uniform color change according to claim 8, characterized in that, The electrochromic device has a first groove in the shape of a bend at each of its four corners, or a second groove in the shape of a bend at each of its four corners.