TWI704394B - Display device - Google Patents

Abstract

A display device includes a first substrate, a second substrate opposite the first substrate, an electrochromic layer disposed between the first substrate and the second substrate, a first electrode layer and a second electrode layer disposed on the second substrate. The electricity of the first electrode layer is opposite the second electrode layer.

Description

Display device

The disclosure relates to a display device.

Recently, various display products have become quite popular and widely used in personal display devices. For user privacy considerations, display devices with anti-peep mode have become a mainstream demand for personal display products today.

However, most of the existing practice is to install a privacy filter on the display screen to achieve the privacy mode. However, in addition to the increased cost of the additional purchase of a privacy filter, since the privacy filter has a fixed optical structure, the light distribution after the light passes through the privacy filter will be affected by the structure of the privacy filter, which will reduce the cost of the display device. brightness.

Therefore, the present disclosure provides a display device with a built-in anti-peep function without using an additional anti-peep sheet.

One embodiment of the present disclosure provides a display device including a first substrate, a second substrate opposite to the first substrate, an electrochromic layer disposed between the first substrate and the second substrate, and a display device disposed on the second substrate. The first transparent electrode layer and the second transparent electrode layer, wherein the electrical properties of the second transparent electrode layer are different from the first transparent electrode layer The electrical properties of the electrode layer.

When power is supplied to the first transparent electrode and the second transparent electrode, the change in the electric field between the first transparent electrode and the second transparent electrode will drive the electrochromic layer to a dark state, thereby providing a privacy mode. Since the first transparent electrode and the second transparent electrode for driving the electrochromic layer to change color are fabricated on the substrate on the same side of the electrochromic layer, the number of photomasks can be saved and the difficulty and cost of fabrication can be reduced.

100A, 100B, 100C, 100D, 100E, 100F‧‧‧Display device

110‧‧‧First substrate

112‧‧‧Second Surface

114‧‧‧Third Surface

120‧‧‧Second substrate

122‧‧‧First surface

124‧‧‧Fifth Surface

130‧‧‧Electrochromic layer

132‧‧‧The first linear pattern

134‧‧‧Second linear pattern

140‧‧‧First transparent electrode layer

142‧‧‧First transparent electrode

144‧‧‧First transparent wire

150‧‧‧Second transparent electrode layer

152‧‧‧Second transparent electrode

154‧‧‧Second transparent wire

160‧‧‧Transparent material layer

170‧‧‧Metal circuit layer

172‧‧‧The first metal wire

174‧‧‧Second metal wire

180‧‧‧Protection layer

190‧‧‧Conductive via

192‧‧‧First conductive via

194‧‧‧Second conductive via

200‧‧‧Third substrate

202‧‧‧Fourth surface

210‧‧‧Display medium layer

220‧‧‧Filter layer

222‧‧‧Shading pattern

224‧‧‧color resistance

230‧‧‧Drive circuit layer

240‧‧‧Backlight Module

A-A, B-B‧‧‧Line segment

D1‧‧‧First direction

D2‧‧‧Second direction

L1, L2‧‧‧Image light

N‧‧‧Normal

S1‧‧‧First side

S2‧‧‧Second side

S3‧‧‧ third side

S4‧‧‧4th side

In order to make the above and other objectives, features, advantages, and embodiments of the present disclosure more comprehensible, detailed descriptions of the accompanying drawings are as follows: Figure 1 is a perspective view of an embodiment of the display device of the present disclosure.

Figure 2 is an exploded view of an embodiment of the disclosed display device.

Figure 3 is a partial top view of the display device in Figure 1.

Fig. 4A and Fig. 4B are cross-sectional views of the electrochromic layer of the display device in the bright state and the dark state along the line of Fig. 1 respectively.

Figure 5 is a top view of another embodiment of the disclosed display device.

Figure 6 is a cross-sectional view along the line B-B in Figure 5.

FIG. 7 is a partial top view of another embodiment of the display device of the disclosure.

FIG. 8 is a partial cross-sectional view of a display device according to another embodiment of the display device of the disclosure.

FIG. 9 is a partial cross-sectional view of a display device according to another embodiment of the display device of the disclosure.

FIG. 10 is a partial top view of an embodiment of the display device of the disclosure.

The following will clearly illustrate the spirit of the present disclosure with drawings and detailed descriptions. Anyone with ordinary knowledge in the relevant technical field can change and modify the techniques taught in the present disclosure after understanding the preferred embodiments of the present disclosure. Does not depart from the spirit and scope of this disclosure.

Referring to FIG. 1 and FIG. 2, which are respectively a perspective view and an exploded view of an embodiment of the display device of the disclosure. The display device 100A includes a first substrate 110, a second substrate 120, an electrochromic layer 130, a first transparent electrode layer 140, and a second transparent electrode layer 150. The first substrate 110 and the second substrate 120 are opposed to each other, the electrochromic layer 130 is disposed between the first substrate 110 and the second substrate 120, and the first transparent electrode layer 140 and the second transparent electrode layer 150 are both disposed on the second substrate. On the substrate 120, the electrical properties of the first transparent electrode layer 140 are different from those of the second transparent electrode layer 150.

For example, the second substrate 120 has a first surface 122 facing the first substrate 110, and the first transparent electrode layer 140 and the second transparent electrode layer 150 are both disposed on the first surface 122 of the second substrate 120. If the first transparent electrode layer 140 is electrically connected to the positive electrode of the voltage source, the second transparent electrode layer 150 is electrically connected to the negative electrode of the voltage source, and vice versa.

The user can decide whether to enable the privacy mode of the display device 100A according to his own needs. For example, if the user decides to turn on the privacy mode, the power is supplied to the first transparent electrode layer 140 and the second transparent electrode layer 150, and the electricity located between the first transparent electrode layer 140 and the second transparent electrode layer 150 The electrochromic layer 130 undergoes an oxidation-reduction reaction due to the first electric field generated between the first transparent electrode layer 140 and the second transparent electrode layer 150, resulting in the electrochromic layer The color of the electrochromic layer 130 changes from the original bright state to the dark state.

Conversely, if the user decides to cancel the privacy mode, the power will stop supplying power to the first transparent electrode layer 140 and the second transparent electrode layer 150, and the electrochromic between the first transparent electrode layer 140 and the second transparent electrode layer 150 The layer 130 can recover from the dark state to the bright state, and then stop the privacy mode.

In an embodiment, the first substrate 110 and the second substrate 120 may be glass substrates, and the materials of the first transparent electrode layer 140 and the second transparent electrode layer 150 may be transparent conductive oxide (Transparent Conductive Oxide, TCO), for example Transparent conductive materials such as indium tin oxide, zinc oxide, aluminum doped zinc oxide, gallium doped zinc oxide, indium doped zinc oxide or graphene. The first transparent electrode layer 140 and the second transparent electrode layer 150 may be formed on the first surface 122 of the second substrate 120 through an etching process. It should be understood that the materials of the first substrate 110 and the second substrate 120 as well as the first transparent electrode layer 140 and the second transparent electrode layer 150 mentioned above are only examples and are not intended to limit the present disclosure. The technical field of the present disclosure has Generally knowledgeable persons should flexibly choose the materials of the first substrate 110 and the second substrate 120, and the first transparent electrode layer 140 and the second transparent electrode layer 150 according to actual needs.

The light transmittance of the electrochromic layer 130 may be different according to the intensity of the electric field applied by the first transparent electrode layer 140 and the second transparent electrode layer 150. For example, when the first transparent electrode layer 140 and the second transparent electrode layer 150 are not energized, the light transmittance of the electrochromic layer 130 is greater than 90%, which corresponds to the aforementioned bright state. As the intensity of the applied electric field gradually increases, the light transmittance of the electrochromic layer 130 also decreases until the critical value of the change is reached, which is The aforementioned dark state. The specific light transmittance value of the electrochromic layer 130 will vary with the electrochromic material used. The electrochromic material in the electrochromic layer 130 includes an organic small molecule viologen color-changing material or a polymer polyaniline color-changing material. It should be understood that the material of the electrochromic layer 130 mentioned above is only an example, and is not intended to limit the present disclosure. Those with ordinary knowledge in the technical field of the present disclosure should flexibly choose the material of the electrochromic layer 130 according to actual needs. .

The display device 100A further includes a transparent material layer 160. The transparent material layer 160 is disposed between the first substrate 110 and the second substrate 120 and fills the gap between the electrochromic layer 130 and the first substrate 110 and the second substrate 120. space. In one embodiment, the refractive index of the transparent material layer 160 is similar to the refractive index of the first substrate 110 and the second substrate 120, so as to maintain the consistency of the light path through the display device 100A. For example, the refractive index of the transparent material layer 160 is approximately 1.4-1.6.

In one embodiment, in addition to supporting the first substrate 110 and the second substrate 120 to improve the structural strength of the display device 100A, the transparent material layer 160 may be patterned to define grooves to facilitate subsequent processing The electrochromic layer 130 is injected into the trench. For example, the transparent material layer 160 can be a transparent photoresist layer formed on the first substrate 110. The transparent photoresist layer can be patterned by an etching process to form trenches therein, and then the first transparent The electrode layer 140 is joined to the second substrate 120 of the second transparent electrode layer 150, and then electrochromic material is injected into the groove. After the electrochromic material is cured, the display device 100A with the electrochromic layer 130 can be obtained.

Please refer to Figure 3, Figure 4A, and Figure 4B at the same time. Figure 3 is a partial top view of the display device in Figure 1, and Figure 4A and Figure 4B are the electrochromic layer of the display device 100A. 130 in the light state and dark state along the first The section view of line A-A in the figure. It should be noted that, in order to maintain the simplicity of the drawing, only the electrochromic layer 130, the first transparent electrode layer 140 and the second transparent electrode layer 150 are shown in Figure 3, which are described first.

In one embodiment, the electrochromic layer 130 includes a plurality of first linear patterns 132 extending in a first direction D1 and arranged in parallel, and a plurality of second linear patterns 134 extending in a second direction D2 and arranged in parallel. The one direction D1 is different from the second direction D2, so that the second linear pattern 134 intersects the first linear pattern 132. For example, the angle between the first direction D1 and the second direction D2 is about 90 degrees, so that the first linear pattern 132 extending along the first direction D1 is orthogonal to the second linear pattern 134 extending along the second direction D2 And constitute a grid structure. In one embodiment, the line width of the first linear pattern 132 and the second linear pattern 134 of the electrochromic layer 130 is about 20-30 μm, and the line spacing is about 80-120 μm.

The first transparent electrode layer 140 includes a plurality of first transparent electrodes 142 and at least one first transparent wire 144 connected to the first transparent electrode 142. The second transparent electrode layer 150 includes a plurality of second transparent electrodes 152 and at least one second transparent wire 154 connected to the second transparent electrode 152. The first transparent electrode 142, the first transparent wire 144, the second transparent electrode 152, and the second transparent wire 154 are all directly disposed on the second substrate 120 and directly contact the first surface 122 of the second substrate 120. Although only four first transparent electrodes 142, two first transparent wires 144, four second transparent electrodes 152, and two second transparent wires 154 are shown in FIG. 3, the present disclosure is not limited to this. Those skilled in the art can change the number of the first transparent electrode 142, the first transparent wire 144, the second transparent electrode 152, and the second transparent wire 154 according to actual needs.

The first transparent wire 144 and the second transparent wire 154 are along the second The direction D2 extends and is alternately arranged in the first direction D1, while the first transparent electrode 142 and the second transparent electrode 152 are alternately arranged in the first direction D1 and in the second direction D2, so that the first The transparent electrode 142 and the second transparent electrode 152 are located on both sides of the first linear pattern 132 and the second linear pattern 134 respectively.

In one embodiment, the first transparent wire 144 and the first transparent electrode 142 connected to it together form a first finger structure, and the second transparent wire 154 and the second transparent electrode 152 connected to it together form a second finger structure. The distance between two adjacent first transparent electrodes 142 is slightly larger than the width of the second transparent electrode 152, and the distance between two adjacent second transparent electrodes 152 is slightly larger than the width of the first transparent electrode 142. The first finger structure is complementary to the second finger structure, and the first finger structure and the second finger structure are arranged in pairs, and the first finger structure and the second finger structure are respectively connected to the positive electrode of the voltage source With negative electrode. The first linear pattern 132 and the second linear pattern 134 of the electrochromic layer 130 are disposed between the first transparent electrode 142 and the second transparent electrode 152.

In other words, the two sides (the left and right sides in the figure) of the first linear pattern 132 of each electrochromic layer 130 are the first transparent electrode 142 and the second transparent electrode 152 respectively. The two sides (upper and lower sides in the figure) of the second linear pattern 134 of each electrochromic layer 130 are the first transparent electrode 142 and the second transparent electrode 152 respectively. Since the first transparent electrode 142 and the second transparent electrode 152 are respectively connected to the positive and negative electrodes of the voltage source, the light penetration of the electrochromic layer 130 is changed by the change of the electric field between the first transparent electrode 142 and the second transparent electrode 152 rate.

As shown in Figure 4A, when the electrochromic layer 130 is in a bright state, the light transmittance of the electrochromic layer 130 is about 80% to 90%, and the The refractive index is about n=1.4~1.6. At this time, the image light sent from the direction of the first substrate 110 can continue to advance without being hindered by the electrochromic layer 130 and leave the second substrate 120 to enter the eyes of the user.

As shown in Figure 4B, in the privacy mode, that is, when the electrochromic layer 130 is in a dark state, the light transmittance of the electrochromic layer 130 is about 0% to 5%, and the refraction of the electrochromic layer 130 The rate is about n=1.4~1.6. At this time, the image light sent from the direction of the first substrate 110, if it is within the normal viewing angle range, such as the image light L1, can proceed without being hindered by the electrochromic layer 130 and leave the second substrate 120 to enter the user’s eyes. . If the image light outside the normal viewing angle range, such as the image light L2, will be blocked by the electrochromic layer 130 and cannot enter the eyes of the user. In other words, in the anti-peep mode, only users located in the front viewing range of the display device 100A can receive images, while other people located outside the front viewing range of the display device 100A will not receive images. The aforementioned positive viewing angle range is generally within a viewing angle range between plus or minus 30 to 45 degrees of the normal line N of the display device 100A.

The display device 100A has an electrochromic layer 130 that is electrochromic to provide a privacy mode when the electrochromic layer 130 is in a dark state, so that people outside the normal viewing angle will not receive images. Since the first transparent electrode layer 140 and the second transparent electrode layer 150 for driving the electrochromic layer 130 from the bright state to the dark state are both fabricated on the substrate on the same side of the electrochromic layer 130, the photomask can be saved. Quantity and reduce the difficulty and cost of production.

Please refer to FIGS. 5 and 6 at the same time. FIG. 5 is a top view of another embodiment of the display device of the disclosure, and FIG. 6 is a cross-sectional view along the line B-B in FIG. 5. The difference between this embodiment and the previous embodiment is that the display device In addition to the first substrate 110, the second substrate 120, the electrochromic layer 130, the first transparent electrode layer 140, and the second transparent electrode layer 150, the device 100B also includes a metal circuit layer 170 disposed on the second substrate 120 , A protective layer 180 covering the metal circuit layer 170, and conductive vias 190 disposed in the protective layer 180 to connect the first transparent electrode layer 140 and the second transparent electrode layer 150 to the metal circuit layer 170. It should be noted that, in order to maintain the simplicity of the drawing, the first substrate 110, the transparent material layer 160, the protective layer 180, and the second substrate 120 are not shown in Figure 5, which are described first.

The first substrate 110 and the second substrate 120 are opposed to each other. The second substrate 120 has a first surface 122 facing the first substrate 110, and the metal circuit layer 170 is disposed on the first surface 122 of the second substrate 120 and directly contacts the first surface 122 of the second substrate 120. The metal circuit layer 170 can be deposited on the first surface 122 of the second substrate 120 by depositing a metal layer, and then the metal layer is etched to obtain a patterned metal circuit layer 170. The metal circuit layer 170 includes a plurality of first metal wires 172 and second metal wires 174 parallel to each other. The protective layer 180 then covers the metal circuit layer 170 and the first surface 122 of the second substrate 120, and then an opening is formed on the protective layer 180, and a conductive material is filled in the opening to form a conductive via 190, and then, Then, a patterned first transparent electrode layer 140 and a second transparent electrode layer 150 are formed on the protection layer 180, so that the first transparent electrode layer 140 and the second transparent electrode layer 150 are connected to the corresponding first transparent electrode layer 140 and the second transparent electrode layer 150 through the conductive via 190. The metal wire 172 and the second metal wire 174.

The transparent material layer 160 may be a transparent photoresist layer formed on the first substrate 110. The transparent photoresist layer may be patterned by an etching process to form trenches therein, and then bonded with the aforementioned second substrate 120, and then Implant in the trench After the electrochromic material is cured, the display device 100B with the electrochromic layer 130 can be obtained.

In one embodiment, the electrochromic layer 130 includes a plurality of first linear patterns 132 extending in a first direction D1 and arranged in parallel, and a plurality of second linear patterns 134 extending in a second direction D2 and arranged in parallel. The one direction D1 is different from the second direction D2, so that the second linear pattern 134 intersects the first linear pattern 132 to form a grid.

The first metal wires 172 and the second metal wires 174 may extend along the second direction D2 and are alternately arranged in the first direction D1. The projections of the first metal wires 172 and the second metal wires 174 on the second substrate 120 substantially overlap with the projections of the second linear patterns 134 on the second substrate 120. The line width of the first metal wire 172 and the second metal wire 174 may be slightly greater than, equal to, or smaller than the line width of the second linear pattern 134 of the electrochromic layer 130.

The first transparent electrode layer 140 includes a plurality of first transparent electrodes 142; the second transparent electrode layer 150 and a plurality of second transparent electrodes 152; the first transparent electrodes 142 and the second transparent electrodes 152 are arranged in a checkered pattern and alternately distributed in Between the first linear pattern 132 and the second linear pattern 134. In other words, in the first direction D1, the first transparent electrodes 142 and the second transparent electrodes 152 are alternately arranged, and in the second direction D2, the first transparent electrodes 142 and the second transparent electrodes 152 are also alternately arranged.

The conductive via 190 includes a first conductive via 192 and a second conductive via 194. The first conductive via 192 is used to connect the first metal wire 172 and the corresponding first transparent electrode 142, and the second conductive via 192 The through hole 194 is used to connect the second metal wire 174 and the corresponding second transparent electrode 152.

In one embodiment, viewed from the top view, the first metal wire 172 and the first transparent electrode 142 connected to it together form a first finger structure, and the second metal wire 174 and the second transparent electrode 152 connected to it together form a first finger structure. The second finger structure. The distance between two adjacent first transparent electrodes 142 is approximately equal to the width of the second transparent electrode 152 plus the width of the two first linear patterns 132 (or the second linear patterns 134), and the distance between two adjacent second transparent electrodes 152 The distance between the two is approximately equal to the width of the first transparent electrode 142 plus the width of the two first linear patterns 132 (or the second linear patterns 134). The first finger structure is complementary to the second finger structure, and the first finger structure and the second finger structure are arranged in pairs.

The first linear pattern 132 and the second linear pattern 134 of the electrochromic layer 130 are disposed between the first transparent electrode 142 and the second transparent electrode 152. In this way, the two sides (left and right sides in the figure) of the first linear pattern 132 of each electrochromic layer 130 are the first transparent electrode 142 and the second transparent electrode 152 respectively. The two sides (upper and lower sides in the figure) of the second linear pattern 134 of each electrochromic layer 130 are the first transparent electrode 142 and the second transparent electrode 152 respectively.

By energizing the first metal wire 172 and the second metal wire 174, an electric field change is generated between the first transparent electrode 142 and the second transparent electrode 152, which causes the light transmittance of the electrochromic layer 130 between them to change, and from The bright state turns to the dark state. The display device 100B uses the grid-shaped electrochromic layer 130 to provide privacy protection.

Since the impedance of the metal material is lower than the impedance of the transparent conductive material, the voltage drop of the current conducted through the first metal wire 172 and the second metal wire 174 will not be too obvious, which can avoid the relatively central part of the display device 100B. The phenomenon that the uniformity of the color change between the electrochromic layer 130 and the electrochromic layer 130 at the more peripheral side is inconsistent.

Refer to FIG. 7, which is a partial top view of another embodiment of the display device of the disclosure. In order to simplify the drawing, the display device 100C in FIG. 7 only shows the first transparent electrode 142, the second transparent electrode 152, the electrochromic layer 130, the first metal wire 172, the second metal wire 174, and the first conductive wire. The holes 192 and the second conductive vias 194, and other components are not shown, and are described first.

As mentioned above, the electrochromic layer 130 includes a first linear pattern 132 and a second linear pattern 134 that are arranged crosswise. The first transparent electrode 142 and the second transparent electrode 152 are alternately arranged and arranged in the first linear pattern. 132 and the second linear pattern 134 on opposite sides. In one embodiment, the line widths of the first linear pattern 132 and the second linear pattern 134 are uniform and consistent. When the first linear pattern 132 is orthogonal to the second linear pattern 134, the first linear pattern 132 and the second linear pattern 134 A plurality of rectangular spaces are defined between the linear patterns 134, and the area of the first transparent electrode 142 and the second transparent electrode 152 may be equal to or slightly larger than the space between the first linear pattern 132 and the second linear pattern 134.

In some embodiments, the interval between the first transparent electrode 142 and the second transparent electrode 152 is not uniform. In other words, the first transparent electrode 142 and the second transparent electrode 152 are not limited to rectangles, but may be other polygons. For example, the first transparent electrode 142 and the second transparent electrode 152 may be polygons with sides of 4-10, but not This is limited. However, in order to maintain the uniformity of the electric field, the first transparent electrode 142 and the second transparent electrode 152 preferably have the same shape and an axisymmetric shape. For example, the shapes of the first transparent electrode 142 and the second transparent electrode 152 are symmetric in the first direction D1, and are also symmetric in the second direction D2.

In one embodiment, the shape of the first transparent electrode 142 and the second transparent electrode 152 is a decagon, and the area is slightly larger than the space between the first linear pattern 132 and the second linear pattern 134. Each of the first transparent electrode 142 and the second transparent electrode 152 includes two opposite first sides S1, two opposite second sides S2, two opposite third sides S3, and four fourth sides S4, The two first sides S1 are parallel to each other, such as parallel to the second linear pattern 134 and are the longest of all sides. The distance d1 between the two first sides S1 may be slightly larger than the two adjacent second linear patterns 134 The distance between d2. The second side S2 is connected to the third side S3, and there is an obtuse angle θ between the second side S2 and the third side S3. The angle of the obtuse angle θ is about 150 to 170 degrees. The length is the same as the length of the third side S3. The fourth side S4 is the shortest among all the sides, and is used to connect the first side S1 and the second side S2, and to connect the first side S1 and the third side S3.

In one embodiment, the first transparent electrode 142 communicates with the first metal wire 172 through the first conductive via 192, and the second transparent electrode 152 communicates with the second metal wire 174 through the first conductive via 192. However, the design of the non-rectangular first transparent electrode 142 and the second transparent electrode 152 can also be applied to the embodiment shown in FIG. 3 and directly connected with the first transparent wire 144 (see FIG. 3) and the second transparent electrode The transparent wire 154 (see Fig. 3) is connected, which will not be repeated here.

Refer to FIG. 8, which is a partial cross-sectional view of a display device according to another embodiment of the display device of the disclosure. The display device 100D further includes a third substrate 200, a display medium layer 210, a filter layer 220, and a backlight module 240. The third substrate 200 may be opposite to the first substrate 110, and the display medium layer 210, such as a liquid crystal layer, is disposed between the first substrate 110 and the third substrate 200. In one embodiment, the filter layer 220 is disposed on the first substrate 110, so that the display medium layer 210 is positioned on the first substrate 110 Between the third substrate 200 and the filter layer 220.

Furthermore, the second substrate 120 has a first surface 122 facing the first substrate 110, and the first transparent electrode layer 140 and the second transparent electrode layer 150 (or in some embodiments may optionally further include The metal circuit layer, the protective layer and the conductive vias are provided on the first surface 122 of the second substrate 120. The first substrate 110 has a second surface 112 facing the second substrate 120, and the electrochromic layer 130 is disposed between the first surface 122 of the second substrate 120 and the second surface 112 of the first substrate 110. The first substrate 110 includes a third surface 114 opposite to the second surface 112, that is, the third surface 114 of the first substrate 110 faces away from the second substrate 120 and faces the third substrate 200. The filter layer 220 is disposed on the third surface 114 of the first substrate 110. The display device 100D further includes a driving circuit layer 230. The third substrate 200 has a fourth surface 202 facing the first substrate 110. The driving circuit layer 230 is disposed on the fourth surface 202 of the third substrate 200. The backlight module 240 is disposed on a side of the third substrate 200 opposite to the first substrate 110.

The filter layer 220 includes a light-shielding pattern 222 and a color resist 224. The light-shielding pattern 222 can be in a checkered pattern to define a plurality of pixel regions, and the color resist 224 is distributed among the light-shielding patterns 222 and corresponds to the pixel region. In one embodiment, the color resistance 224 includes three color resistances: red (R) color resistance, green (G) color resistance, and blue (B) color resistance, but it is not limited thereto.

When fabricating the display device 100D, the first transparent electrode layer 140 and the second transparent electrode layer 150 can be fabricated on the first surface 122 of the second substrate 120 (or in some embodiments, it can optionally further include Metal circuit layer, protective layer and conductive vias). A patterned transparent material layer 160 is fabricated on the second surface 112 of the first substrate 110, and a filter is fabricated on the third surface 114 of the first substrate 110 层220. The driving circuit layer 230 is fabricated on the third substrate 200. Next, after the first substrate 110 and the third substrate 200 are combined together, a display medium layer 210 is injected between the first substrate 110 and the third substrate 200. Then, the second substrate 120 and the first substrate 110 are assembled together, and the electrochromic layer 130 is injected between the second substrate 120 and the first substrate 110. In this embodiment, the patterned transparent material layer 160 and the filter layer 220 are directly fabricated on the two opposite surfaces of the first substrate 110, which can reduce the thickness of the display device 100D.

Refer to FIG. 9, which is a partial cross-sectional view of a display device according to another embodiment of the display device of the disclosure. The display device 100E further includes a third substrate 200, a display medium layer 210, and a filter layer 220. The third substrate 200 may be opposite to the second substrate 120, and the display medium layer 210, such as a liquid crystal layer, is disposed between the second substrate 120 and the third substrate 200. The filter layer 220 is disposed on the second substrate 120.

Furthermore, the second substrate 120 has a first surface 122 facing the first substrate 110, and the first transparent electrode layer 140 and the second transparent electrode layer 150 (or in some embodiments may optionally further include The metal circuit layer, the protective layer and the conductive vias are provided on the first surface 122 of the second substrate 120. The first substrate 110 has a second surface 112 facing the second substrate 120, and the electrochromic layer 130 is disposed between the first surface 122 of the second substrate 120 and the second surface 112 of the first substrate 110. The second substrate 120 includes a fifth surface 124 opposite to the first surface 122, that is, the fifth surface 124 of the second substrate 120 faces away from the first substrate 110 and faces the third substrate 200. The filter layer 220 is disposed on the fifth surface 124 of the second substrate 120. The third substrate 200 has a fourth surface 202 facing the first substrate 110, and the driving circuit layer 230 is disposed on the fourth surface 202 of the third substrate 200. The backlight module 240 is disposed on a side of the third substrate 200 opposite to the first substrate 110.

When fabricating the display device 100E, the first transparent electrode layer 140 and the second transparent electrode layer 150 can be fabricated on the first surface 122 of the second substrate 120 (or, in some embodiments, it can optionally further include The metal circuit layer, the protective layer and the conductive vias) and the filter layer 220 are formed on the fifth surface 124 of the second substrate 120. A patterned transparent material layer 160 is fabricated on the second surface 112 of the first substrate 110. The driving circuit layer 230 is fabricated on the third substrate 200. Next, after the second substrate 120 and the third substrate 200 are combined together, the display medium layer 210 is injected between the second substrate 120 and the third substrate 200. Then, the second substrate 120 and the first substrate 110 are assembled together, and the electrochromic layer 130 is injected between the second substrate 120 and the first substrate 110. In this embodiment, the first transparent electrode layer 140 and the second transparent electrode layer 150 (or in some embodiments may optionally further include a metal circuit layer, a protective layer, and conductive vias) and the filter layer 220 are directly connected. Fabricated on the two opposite surfaces of the second substrate 120 can reduce the thickness of the display device 100E.

Please refer to FIG. 10, which is a partial top view of an embodiment of the display device of the disclosure. In order to make the drawing simple, the display device 100F in FIG. 10 only shows the electrochromic layer 130, the first metal wire 172, the second metal wire 174, and the light-shielding pattern 222. The rest of the elements are not shown, and will be described first. .

From the top view, the first metal wire 172 and the second metal wire 174 substantially overlap the second linear pattern 134 of the electrochromic layer 130, so that the first metal wire 172 and the second metal wire 174 can be evenly supplied with power. The first transparent electrode 142 (see FIG. 5) and the second transparent electrode 152 (see FIG. 5) on opposite sides of the second linear pattern 134 of the electrochromic layer 130.

The electrochromic layer 130, the first metal wire 172 and the second metal wire The line 174 also overlaps the light-shielding pattern 222 so that the first metal wire 172 and the second metal wire 174 overlap the light-shielding pattern 222 to prevent the first metal wire 172 and the second metal wire 174 from affecting the aperture ratio. The aperture ratio referred to here mainly refers to the aperture ratio when the user views the display device 100F from a front view angle, because the privacy mode of the display device 100F does not work at a front view angle.

Those skilled in the art should understand that although the above embodiments are described with liquid crystal display devices, the above applications are not limited to liquid crystal display devices, and any other suitable display devices are also within the scope of the present disclosure.

In summary, the display device is provided with an electrochromic layer and a first transparent electrode and a second transparent electrode on both sides of the electrochromic layer. When power is supplied to the first transparent electrode and the second transparent electrode, the first transparent electrode The change of the electric field between the electrode and the second transparent electrode will drive the electrochromic layer to a dark state, thereby providing a privacy mode. Since the first transparent electrode and the second transparent electrode for driving the electrochromic layer to change color are fabricated on the substrate on the same side of the electrochromic layer, the number of photomasks can be saved and the difficulty and cost of fabrication can be reduced.

Although this disclosure has been disclosed in the above embodiments, it is not intended to limit the disclosure. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this disclosure is protected The scope shall be subject to those defined in the attached patent scope.

100A‧‧‧Display device

110‧‧‧First substrate

120‧‧‧Second substrate

122‧‧‧First surface

130‧‧‧Electrochromic layer

140‧‧‧First transparent electrode layer

150‧‧‧Second transparent electrode layer

160‧‧‧Transparent material layer

Claims (15)

A display device comprising: a first substrate; a second substrate opposite to the first substrate; an electrochromic layer disposed between the first substrate and the second substrate, wherein the electrochromic layer includes A plurality of first linear patterns arranged in parallel and a plurality of second linear patterns arranged in parallel, the second linear patterns intersecting the first linear patterns; a first transparent electrode layer disposed on the second substrate; and A second transparent electrode layer is disposed on the second substrate, wherein the electrical properties of the second transparent electrode layer are different from those of the first transparent electrode layer. The display device according to claim 1, wherein the first transparent electrode layer includes a plurality of first transparent electrodes, the second transparent electrode layer includes a plurality of second transparent electrodes, the first transparent electrodes and the second transparent electrodes The transparent electrodes are arranged in staggered arrangement and are respectively located on both sides of the first linear patterns and the second linear patterns. The display device according to claim 2, wherein the shape of each of the first transparent electrode and each of the second transparent electrodes is a polygon, and the number of sides of the polygon is 4-10. The display device according to claim 2, wherein the first transparent electrode layer includes a plurality of first transparent wires connected to the first transparent electrodes, and the second transparent electrode layer includes a plurality of second transparent wires connected to the The second transparent electrode, and the first transparent wires, the second transparent wires, the first transparent electrodes and the second transparent electrodes directly contact the second substrate. The display device according to claim 4, wherein each of the first transparent wires and the corresponding first transparent electrodes constitute a first finger structure, and each of the second transparent wires and the corresponding second transparent electrodes constitute A second finger structure. The first finger structure is complementary to the second finger structure. The display device according to claim 2, further comprising: a metal circuit layer disposed on the second substrate; a protective layer covering the metal circuit layer and the second substrate, wherein the electrochromic layer, the first substrate The transparent electrode layer and the second transparent electrode layer are disposed on the protective layer; and a plurality of conductive vias are disposed in the protective layer to connect the first transparent electrode layer and the second transparent electrode layer to the metal circuit Floor. The display device according to claim 6, wherein the metal circuit layer includes a plurality of first metal wires and a plurality of second metal wires parallel to each other, and the conductive vias include: a plurality of first conductive vias connected to the The first transparent electrodes and the first metal wires; and a plurality of second conductive vias connecting the second transparent electrodes and the second metal wires. The display device according to claim 7, wherein each of the first metal wires and the corresponding first transparent electrodes constitute a first finger structure, and each of the second metal wires and the corresponding second transparent electrodes constitute A second finger structure. The first finger structure is complementary to the second finger structure. The display device according to claim 1, wherein the widths of the first linear patterns and the second linear patterns are 20-30 μm. The display device according to claim 1, further comprising: a transparent material layer filled between the first substrate, the second substrate, the first linear patterns and the second linear patterns, wherein the transparent material The refractive index of the layer is 1.4 to 1.6. The display device according to claim 1, wherein the refractive index of the electrochromic layer is 1.4 to 1.6. The display device according to claim 1, further comprising: a filter layer disposed on the first substrate; a third substrate; and a display medium layer disposed between the third substrate and the filter layer, The electrochromic layer and the filter layer are respectively located on opposite sides of the first substrate. The display device according to claim 1, further comprising: a filter layer disposed on the second substrate; A third substrate; and a display medium layer disposed between the third substrate and the filter layer, wherein the electrochromic layer and the filter layer are respectively located on opposite sides of the second substrate. The display device according to claim 12 or 13, further comprising: a metal circuit layer disposed on the second substrate, including a plurality of first metal wires and a plurality of second metal wires parallel to each other; a protective layer covering The metal circuit layer and the second substrate, wherein the electrochromic layer, the first transparent electrode layer and the second transparent electrode layer are arranged on the protective layer; and a plurality of conductive vias are arranged in the protective layer , To connect the first transparent electrode layer and the second transparent electrode layer to the corresponding first metal wires and the second metal wires. The display device according to claim 14, wherein the filter layer includes a light-shielding pattern, projections of the first metal wires and the second metal wires on the second substrate and the light-shielding pattern on the second substrate The projections above overlap.

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