CN101852963B - Display device - Google Patents

Abstract

The present invention provides a display device, comprising a display panel, a barrier layer, a protective layer, a first optical adhesive layer and a second optical adhesive layer, wherein the barrier layer is disposed above the display panel, and the protective layer is disposed above the barrier layer. The first optical adhesive layer is disposed between the display panel and the barrier layer and has a first thickness. The second optical adhesive layer is disposed between the protective layer and the barrier layer and has a second thickness, and the first thickness is greater than the second thickness. The display device of the present invention has sufficient impact resistance.

Description

display device

technical field

The present invention relates to a display device, and in particular to a display device with sufficient impact resistance.

Background technique

Since flexible display devices not only have the advantages of light weight and thin thickness, but also have the advantages of being flexible and unbreakable, the manufacture of flexible display devices has become an important development trend. At present, the common flexible display device is electrophoretic display (electro-phoretic display, EPD), which is a display that controls the distribution of charged particles through an electric field, and then changes the reflectivity of the display area to ambient light to produce a display effect. . Based on its display principle, the electrophoretic display has the characteristics of bistability and no need for an additional light source, thus meeting the requirements of modern technology for flexible displays with high power-saving characteristics.

FIG. 1 shows a schematic cross-sectional view of a known electrophoretic display. Please refer to FIG. 1 , in the current electrophoretic display 100, at least one functional layer 120 is usually disposed on the electrophoretic display panel 110, and these functional layers 120 can be used to prevent moisture from entering the electrophoretic display panel 110. The barrier layer ( barrierlayer), a protective layer to prevent the electrophoretic display panel 110 from being scratched by external forces, or an anti-glare, anti-fog or anti-reflection film with optical functions. However, in the known electrophoretic display 100, these functional layers 120 do not have sufficient impact strength. If the electrophoretic display 100 is accidentally impacted by an external force, the display units in the electrophoretic display panel 110 may be damaged, resulting in abnormal display of the electrophoretic display 100 .

Contents of the invention

Therefore, an object of the present invention is to provide a display device having sufficient impact resistance.

The present invention provides a display device, including a display panel, a barrier layer, a protective layer, a first optical adhesive layer and a second optical adhesive layer, wherein the barrier layer is disposed above the display panel, and the protective layer is disposed above the barrier layer. The first optical adhesive layer is disposed between the display panel and the blocking layer and has a first thickness. The second optical adhesive layer is disposed between the protective layer and the blocking layer, and has a second thickness, and the first thickness is greater than the second thickness.

In an embodiment of the present invention, the above-mentioned display panel is an electrophoretic display panel, such as a microcup type electrophoretic display panel or a microcapsule type electrophoretic display panel.

In an embodiment of the present invention, the material of the first optical adhesive layer and the second optical adhesive layer includes optical double-sided adhesive tape.

In an embodiment of the present invention, the above-mentioned first thickness is twice the second thickness.

In an embodiment of the present invention, the above display device further includes at least one optical film disposed on the protective layer.

In an embodiment of the present invention, the protective layer has an optically treated surface and a backside opposite to each other, wherein the backside is located on the second optical adhesive layer.

In an embodiment of the present invention, the above-mentioned optically treated surface includes an anti-reflection surface or an anti-glare surface.

In an embodiment of the present invention, the material of the barrier layer includes waterproof material or silicon dioxide.

In an embodiment of the present invention, the above-mentioned protection layer is made of a plastic material, such as polyethylene terephthalate (Polyethyleneterephthalate, PET).

In the display device of the present invention, since the first optical adhesive layer located between the barrier layer and the display panel is not easily deformed due to impact force, the present invention designs its thickness to be greater than that of the first optical adhesive layer located between the protective layer and the barrier layer. The thickness of the second optical adhesive layer is to provide sufficient impact resistance strength of the display device through the thicker first optical adhesive layer, thereby increasing the service life of the display device.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, an embodiment is given below and described in detail with accompanying drawings.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a conventional electrophoretic display.

FIG. 2 is a schematic cross-sectional view of a display device according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a display device in another embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a display device in another embodiment of the present invention.

Wherein, the reference signs are explained as follows:

100: Electrophoretic display

110: Electrophoretic display panel

120: Functional layer

200: display device

210: display panel

211: display surface

212: Active element array substrate

214: display layer

220: barrier layer

230: protective layer

232: Optically treated surface

234: back

240: first optical adhesive layer

250: second optical adhesive layer

260: Optical film

T1: first thickness

T2: second thickness

Detailed ways

FIG. 2 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. Referring to FIG. 2 , the display device 200 includes a display panel 210 , a barrier layer 220 , a protective layer 230 , a first optical adhesive layer 240 and a second optical adhesive layer 250 . Wherein, the display panel 210 is, for example, an electrophoretic display panel. In detail, the display panel 210 is composed of, for example, an active array substrate 212 and an electrophoretic layer 214 , wherein the active array substrate 212 may be a thin film transistor array substrate, but the present invention is not limited thereto. Moreover, the display panel 210 may be a micro-cup electrophoretic display panel, or a microcapsule electrophoretic display panel. In other words, the electrophoretic layer 214 can be a microcup electrophoretic layer as shown in FIG. 2 or a microcapsule electrophoretic layer as shown in FIG. 3 , but the present invention is not limited thereto.

Referring to FIG. 2 again, the protective layer 230 is disposed above the display layer 214 of the display panel 210 , and is made of, for example, a transparent plastic material such as polyethylene terephthalate (PET). Due to the poor water resistance of plastic materials, the display device 200 is further provided with a barrier layer 220 between the display panel 210 and the protective layer 230 to prevent external moisture and oxygen from penetrating the electrophoretic layer 214 . In this embodiment, the material of the barrier layer 220 is, for example, silicon oxide, such as silicon dioxide.

The first optical adhesive layer 240 is disposed between the display panel 210 and the blocking layer 220 for adhering the blocking layer 220 on the electrophoretic layer 214 . The second optical adhesive layer 250 is disposed between the protection layer 230 and the barrier layer 220 for adhering the protection layer 230 to the barrier layer 220 . Specifically, the first optical adhesive layer 240 and the second optical adhesive layer 250 are, for example, optical double-sided adhesive (OCA).

Since the light transmittance of the first optical adhesive layer 240 and the second optical adhesive layer 250 is about 90% or more, they can pass through the first optical adhesive layer 240 and the second optical adhesive layer 240 respectively without affecting the light going out and entering the display panel 210. The two optical adhesive layers 250 adhere the barrier layer 220 and the protection layer 230 on the display surface 211 of the display panel 210 . Moreover, the first optical adhesive layer 240 has a first thickness T ₁ , and the second optical adhesive layer 250 has a second thickness T ₂ , wherein the first thickness T ₁ is greater than the second thickness T ₂ .

Based on the above, since the active matrix substrate 212 has sufficient material strength and is not easily damaged by impact, an impact force is usually applied from above the protective layer 230 to test the impact strength of the display device 200 . That is to say, during the impact strength test of the display device 200, the impact force received by the second optical adhesive layer 250 is greater than the impact force received by the first optical adhesive layer 240, and since the impact force applied is continuous The impact force, therefore, easily deforms the second optical adhesive layer 250 to reduce the impact strength. It can be seen that increasing the second thickness T ₂ of the second optical adhesive layer 250 cannot effectively improve the impact strength of the display device 200 .

Conversely, since the material hardness of the barrier layer 220 is greater than the material hardness of the first optical adhesive layer 240 and the second optical adhesive layer 250, in the impact test, the barrier layer 220 disposed between the two can avoid the first optical adhesion. Layer 240 deforms with second optical adhesion layer 250 . In this way, the overall impact resistance of the display device 200 can be improved by increasing the first thickness _T1 of the first optical adhesive layer 240 , thereby increasing the service life of the display device 200 .

In particular, when the impact strength test is carried out under the condition that the first thickness _T1 is twice the second thickness _T2 in this embodiment, the impact strength of the obtained display device 200 is equal to that of the first optical adhesive layer 240 and the second optical adhesive layer 240. 25 times the impact strength when the adhesive layer 250 is uniformly thick.

Please continue to refer to FIG. 2 , the protection layer 230 of this embodiment may have an optically processed surface 232 and a back surface 234 , wherein the optically processed surface 232 is opposite to the back surface 234 , and the back surface 234 is located on the second optical adhesive layer 250 . For example, the optically treated surface 232 is an anti-glare, anti-fog or anti-reflection surface to further improve the display quality of the display device 200 .

In addition, in other embodiments of the present invention, as shown in FIG. 4 , at least one optical film 260 may also be disposed on the protective layer 230, such as an anti-glare film, an anti-fog film or an anti-reflection film. sheet, but the present invention is not limited thereto.

To sum up, in the display device of the present invention, the thickness of the first optical adhesive layer located between the barrier layer and the display panel is greater than the thickness of the second optical adhesive layer located between the protective layer and the barrier layer, and due to the barrier The hardness of the layer is generally greater than that of the first optical adhesive layer, so when the display device is subjected to an impact force applied from above the protective layer, even if the impact strength of the second optical adhesive layer is reduced due to deformation, the barrier layer can protect The first optical adhesive layer is not easily deformed, so that the display device can still provide sufficient impact resistance through the thicker first optical adhesive layer, thereby increasing the service life of the display device.

Although the present invention has been disclosed as above with an embodiment, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention should be subject to the scope of protection defined by the appended claims.

Claims (11)

1. display device comprises:

One display panel;

One restraining barrier is disposed at this display panel top;

One protective seam is disposed at this top, restraining barrier;

One first optics adhesive coating is disposed between this display panel and this restraining barrier, and has one first thickness; And

One second optics adhesive coating is disposed between this protective seam and this restraining barrier, and has one second thickness, and wherein this first thickness is greater than this second thickness,

Wherein, the material hardness on said restraining barrier is greater than the material hardness of said first optics adhesive coating and the said second optics adhesive coating.

2. display device as claimed in claim 1, wherein this display panel is an electrophoretic display panel.

3. display device as claimed in claim 2, wherein this display panel is little cup type electrophoretic display panel or microcapsules formula electrophoretic display panel.

4. display device as claimed in claim 1, wherein the material of this first optics adhesive coating and this second optics adhesive coating comprises the optics double faced adhesive tape.

5. display device as claimed in claim 1, wherein this first thickness twice that is this second thickness.

6. display device as claimed in claim 1 also comprises at least one blooming piece, is disposed on this protective seam.

7. display device as claimed in claim 1, wherein this protective seam has the optical processing surface and a back side, and this optical processing surface is relative with this back side, and this back side is positioned on this second optics adhesive coating.

8. display device as claimed in claim 1, wherein this optical processing surface comprises anti-reflecting surface or anti-dizzy surface.

9. display device as claimed in claim 1, wherein the material on this restraining barrier comprises waterproof material or silicon dioxide.

10. display device as claimed in claim 1, wherein the material of this protective seam comprises plastic material.

11. display device as claimed in claim 10, wherein the material of this protective seam comprises polyethylene terephthalate.

Images