CN103488324A - Touch display device, its protective cover and attaching device - Google Patents

Abstract

The embodiment of the invention provides a touch display device, a protective outer cover and an attaching device thereof, wherein the touch display device comprises the protective outer cover, the protective outer cover is provided with a first surface and an opposite second surface, the first surface is a flat surface, a touch sensing element is arranged below the second surface of the protective outer cover, a display element is arranged below the touch sensing element, a Chinese character 'kou' shaped adhesive is arranged between the touch sensing element and the display element, a gap surrounded by the Chinese character 'kou' shaped adhesive is arranged between the touch sensing element and the display element, and the height of the center of the gap is larger than that of the periphery of the gap. According to one embodiment, the protective cover of the touch display device includes a flat outer surface and a concave inner surface. The attaching device of the touch display device comprises a first tray and a second tray which are respectively used for bearing the protective outer cover and the touch sensing element. The invention can avoid the mutual contact of the upper part and the lower part of the touch display device, thereby overcoming the Newton ring phenomenon encountered by the traditional touch display device.

Description

Touch display device, its protective cover and attaching device

technical field

The present invention relates to a touch display device, in particular to a touch display device using glue to join upper and lower parts.

Background technique

In the current touch display device, its main components such as the protective cover, the touch sensing element layer, and the display panel all belong to a sheet structure, and the touch sensing element layer attached to the protective cover can be used The glue is bonded with the display panel, and a gap surrounded by the glue is formed between the display panel and the touch sensing element layer.

When the touch display device is gradually becoming thinner, the thickness of the sticker will be thinner, and the gap surrounded by the sticker between the display panel and the touch sensing element layer will also be reduced accordingly. Since the chip parts of the touch display device, such as the protective cover, the touch sensing element layer, and the display panel, will be processed by high-temperature processes (processes), the stress of each chip part will be released, resulting in various Warping of sheet parts. When the gap between the parts above the sticker and the parts below shrinks with the thinning of the touch display device, it will also cause the upper and lower parts to contact each other, and then a Newton's ring phenomenon will occur, causing the traditional The display screen of the touch display device is defective.

Therefore, if a thinner touch display device is to be developed, the above-mentioned problems must be overcome.

Contents of the invention

In view of this, the object of the present invention is to provide a touch display device, which utilizes the structural design of the protective cover or the touch sensing element, so that the gap between the upper part and the lower part of the touch display device reaches the height of the center The height of the touch display device is higher than that of the periphery, thereby preventing the upper part and the lower part of the touch display device from contacting each other, thereby overcoming the Newton ring phenomenon encountered by the above-mentioned traditional touch display device.

According to an embodiment of the present invention, a touch display device is provided, comprising: a protective outer cover having a first surface and a second surface opposite to the first surface, wherein the first surface is a flat surface; a touch sensing element, It is arranged under the second surface of the protective outer cover; the display element is arranged under the touch sensing element; and the word glue is arranged between the touch sensing element and the display element, wherein the touch sensing element and the display element There is a gap surrounded by glue, the height of the center of the gap is greater than the height of the periphery of the gap, wherein the periphery of the gap is adjacent to the glue.

According to an embodiment of the present invention, a protective outer cover of a touch display device is provided, including: a glass substrate having a first surface on the touch side and a second surface opposite to the first surface, wherein the first surface is flat surface, and the second surface is concave.

According to an embodiment of the present invention, there is also provided an attachment device for a touch display device, including: a first tray with a recessed portion to carry a protective outer cover; and a second tray with a recessed portion to carry a touch sensing element , wherein the concave portion of the second tray is opposite to the concave portion of the first tray, and the bottom surface of the concave portion of the second tray is an arc-shaped convex surface.

In order to make the above-mentioned purposes, features, and advantages of the present invention more obvious and easy to understand, the accompanying drawings are described in detail as follows:

Description of drawings

FIG. 1 shows a schematic cross-sectional view of a touch display device according to an embodiment of the present invention.

FIG. 2 shows a schematic cross-sectional view of a touch display device according to another embodiment of the present invention.

FIG. 3 shows a schematic cross-sectional view of a touch display device according to yet another embodiment of the present invention.

FIG. 4 shows a schematic cross-sectional view of a touch display device according to yet another embodiment of the present invention.

5A and FIG. 5B are schematic cross-sectional views showing a bonding process of a protective outer cover of a touch display device and a touch sensing element using a bonding device according to an embodiment of the present invention.

Wherein, the reference signs are explained as follows:

101～protective outer cover;

101A - the first surface (outer surface) of the protective outer cover;

101B - the second surface (inner surface) of the protective outer cover;

103～adhesive;

105～the substrate of the touch sensing element;

105A~the third surface (outer surface) of the substrate;

105B - the fourth surface (inner side surface) of the substrate;

107, 109, 115—the touch sensing layer of the touch sensing element;

110～touch sensing element;

111～word glue;

113～gap;

113C ~ the center of the gap;

113P～the periphery of the gap;

120～display components;

H1～the height at the center of the gap;

H2～height at the periphery of the gap;

T1～the thickness of the word glue;

117～the protective layer of the touch sensing element;

200～touch display device;

300～attached equipment;

310～the first tray;

312～the depression of the first tray;

314 - the bottom surface of the recessed portion of the first tray;

320～second tray;

322～the depression of the second tray;

324 - the bottom surface of the recessed portion of the second tray;

330～exhaust hole;

340～the first pallet and the second pallet are close to each other;

350 - the first tray and the second tray are separated from each other.

Detailed ways

Referring to FIG. 1 , FIG. 1 shows a schematic cross-sectional view of a touch display device 200 according to an embodiment of the present invention. The touch display device 200 includes a protective cover 101, such as tempered glass, which has a first surface 101A (outer surface) as a touch side, and a second surface 101B (inner surface) opposite to the first surface 101A. ). In this embodiment, the first surface 101A is a flat surface, while the second surface 101B has a curved concave surface, and the curved concave surface of the second surface 101B can be formed by grinding or etching. The concave shape may be a curved concave surface or an arched concave surface. In this embodiment, the shape of the concave surface is an arc-shaped concave surface, which is composed of a plurality of gradient slopes. The arched concave surface is composed of two side slopes and a middle plane.

The touch sensing element 110 is disposed under the second surface 101B of the protective outer cover 101, and the touch sensing element 110 can be attached to the protective outer cover 101 through an adhesive 103. The material of the adhesive 103 is, for example, water glue. The control sensing element 110 is conformably attached under the curved concave surface of the second surface 101B of the protective cover 101 . In this embodiment, the touch sensing element 110 includes a base 105, and two touch sensing layers 107 and 109 respectively formed on the outer and inner sides of the base 105. The base 105 can be a glass substrate or a plastic film layer. The touch sensing layers 107 and 109 respectively include a plurality of touch sensing electrodes, these touch sensing electrodes can be formed of transparent conductive materials, and the touch sensing electrodes can be in any pattern, which depends on the design of the touch sensing electrodes need. The touch-sensing electrodes via the touch-sensing layers 107 and 109 can provide positioning in the X-direction and Y-direction of the position where the operator touches the touch display device 200 .

In another embodiment, the touch sensing element 110 in FIG. 1 may also have only one side of the touch sensing layer 107 or 109 and the substrate 105, wherein the multiple touch sensing layers of the touch sensing layer 107 or 109 The measuring electrodes can simultaneously provide positioning in the X direction and the Y direction of the touch position.

In addition, the touch display device 200 further includes a display element 120 disposed under the touch sensing element 110 , and the display element 120 is, for example, a liquid crystal display panel or other types of display panels. The display element 120 is bonded to the touch sensing element 110 via the glue 111, and forms a gap (air gap) 113 between the display element 120 and the touch sensing element 110, the gap 113 is surrounded by the glue 111, the mouth The sticker 111 is, for example, a double-sided adhesive tape. In one embodiment, the thickness T1 of the sticker 111 may be about 0.3 mm or less than 0.3 mm.

In this embodiment, since the second surface 101B of the protective cover 101 has an arc-shaped concave surface, and the touch-sensing element 110 is conformably attached under the arc-shaped concave surface, the display element 120 and the touch-sensing element The height H1 of the central portion 113C of the gap 113 between the components 110 is greater than the height H2 of the peripheral portion 113P of the gap 113 , wherein the peripheral portion 113P is adjacent to the sticker 111 . According to an embodiment of the present invention, the height H1 is at least 0.2 mm larger than the height H2, for example, the height H1 may be 0.2 mm to 5 mm larger than the height H2, so that even if the thickness T1 of the sticker 111 is reduced and the gap 113 is reduced, it can still effectively To prevent the components above the sticker 111 such as the touch sensing element 110 from contacting the components below the sticker 111 such as the display element 120 , thereby avoiding the Newton ring phenomenon.

Referring to FIG. 2 , FIG. 2 shows a schematic cross-sectional view of a touch display device 200 according to another embodiment of the present invention. The touch display device 200 includes a protective cover 101 , the protective cover 101 has a first surface 101A as a touch side, and a second surface 101B attached to the touch sensing element 110 . In this embodiment, the first surface 101A and the second surface 101B of the protective cover 101 are flat surfaces, but the base 105 of the touch sensing element 110 has a flat third surface 105A and a concave fourth surface. The surface 105B, wherein the third surface 105A can provide the touch sensing layer 107 formed on it, and the fourth surface 105B faces the display element 120, and is bonded to the display element 120 via the word glue 111, in the touch sensing element A gap 113 is created between the substrate 105 of 110 and the display element 120 . In this embodiment, the substrate 105 may be a glass substrate, so the fourth surface 105B having a concave shape may be formed by grinding or etching. The concave shape may be an arc concave surface or an arched concave surface. In this embodiment, the shape of the concave surface is an arc-shaped concave surface, which is composed of a plurality of gradient slopes. The arched concave surface is composed of two side slopes and a middle plane.

Since the underside of the base 105 of the touch sensing element 110 of this embodiment has a concave fourth surface 105B, the height at the center of the gap 113 between the display element 120 and the base 105 will be greater than the periphery of the gap 113 According to an embodiment of the present invention, the height at the center of the gap 113 is 0.2 mm to 5 mm larger than the height at the periphery, so that the substrate 105 of the touch sensing element 110 and the display element 120 can be effectively prevented from contacting each other. Thereby avoiding the occurrence of Newton ring phenomenon.

Referring to FIG. 3 , FIG. 3 shows a schematic cross-sectional view of a touch display device 200 according to another embodiment of the present invention. The difference between FIG. 3 and FIG. 1 is that the concave shape of the second surface 101B of the protective cover 101 is an arched concave surface, and the arched concave surface can also be formed by grinding or etching.

In the embodiment of FIG. 3 , the gap 113 surrounded by the glue 111 between the display element 120 and the touch sensing element 110 also has the feature that the height at the center is greater than the height at the periphery, and the height at the center The height at least 0.2 mm to 5 mm higher than the height at the periphery can effectively prevent the touch sensing element 110 and the display element 120 from contacting each other, thereby avoiding the occurrence of the Newton ring phenomenon.

In another embodiment, the touch sensing element 110 in FIG. 3 may also have only one side of the touch sensing layer 107 or 109 and the substrate 105, wherein the touch sensing layer 107 or 109 has a plurality of touch sensors The measuring electrodes can simultaneously provide positioning in the X direction and the Y direction of the touch position.

Referring to FIG. 4 , FIG. 4 shows a schematic cross-sectional view of a touch display device 200 according to yet another embodiment of the present invention. In this embodiment, the touch sensing element 110 does not include a substrate, but directly forms the touch sensing layer 115 on the concave second surface 101B of the protective cover 101 , and on the second surface of the protective cover 101 A protective layer 117 is also formed on the surface 101B to cover the touch sensing layer 115. The material of the protective layer 117 can be an organic or inorganic insulating material. The touch sensing element 110 is formed by the touch sensing layer 115 and the protective layer 117. . Afterwards, the protective layer 117 of the touch sensing element 110 is bonded to the display element 120 through the glue 111 , and a gap 113 is formed between the protective layer 117 and the display element 120 .

In this embodiment, since the protective layer 117 is conformably formed on the second surface 101B having a concave shape of the protective outer cover 101, the protective layer 117 also has a concave surface, so that a gap is formed between the display element 120 and the protective layer 117. The gap 113 has a feature that the height at the center is greater than the height at the periphery, and the height at the center is at least 0.2 mm to 5 mm greater than the height at the periphery, so that the touch sensing element 110 and the display element 120 can be effectively prevented from contacting each other , so as to avoid the occurrence of Newton ring phenomenon.

Referring to FIG. 5A and FIG. 5B , FIG. 5A and FIG. 5B show a cross-section of a bonding process of the protective cover 101 of the touch display device 200 and the touch sensing element 110 using the bonding device 300 according to an embodiment of the present invention. A schematic diagram, wherein the protective cover 101 and the touch sensing element 110 of the touch display device 200 are illustrated by taking the embodiment of FIG. The control sensing element 110 can also use the attaching equipment 300 to carry out the attaching process.

The attaching device 300 includes a first tray 310 having a recess 312 to carry the protective cover 101 , the bottom surface 314 of the recess 312 may be a flat surface, and the bottom surface 314 is in contact with the first surface 101A of the protective cover 101 . The attaching device 300 also includes a second tray 320, which has a recessed portion 322 to carry the touch sensing element 110, the recessed portion 322 of the second tray 320 is set facing the recessed portion 312 of the first tray 310, and the recessed portion 322 of the second tray 320 The bottom surface 324 of the concave portion 322 may have an arc-shaped convex surface, and the arc-shaped convex surface helps the touch-sensing element 110 to be conformably attached under the concave surface of the second surface 101B of the protective cover 101 .

As shown in FIG. 5A, the first tray 310 and the second tray 320 respectively have a plurality of air extraction holes 330, and these air extraction holes 330 communicate with the recessed portion 312 of the first tray 310 and the recessed portion 322 of the second tray 320, and these air extraction holes The air hole 330 is also connected to a vacuum device (not shown). When the vacuum device is turned on, the protective outer cover 101 and the touch sensing element 110 can be respectively sucked and adhered to the first tray 310 and the first tray 310 through the air hole 330. Next, on the second tray 320 , the first tray 310 and the second tray 320 are brought close to each other, as indicated by the arrow 340 in FIG. 5A , and the bonding process of the protective cover 101 and the touch sensing element 110 is performed. In one embodiment, the adhesive 103 can be coated on the surface of the protective cover 101 or the touch sensing element 110 to help the bonding of the protective cover 101 and the touch sensing element 110 .

After the bonding process of the protective outer cover 101 and the touch sensing element 110 is completed, the vacuum device is turned off, and the first tray 310 and the second tray 320 are separated from each other, as indicated by the arrow 350 in FIG. 5B , after the attachment is completed The protective cover 101 and the touch sensing element 110 are protected. Afterwards, the attached protective cover 101 and the touch sensing element 110 are bonded to the display element 120 by using the glue 111 , and the manufacture of the touch display device 200 can be completed.

According to the embodiment of the present invention, the first surface 101A (outer surface) of the protective cover 101 of the touch display device 200 as the touch side is kept in a flat state, and the display element 120 is also kept without bending or warping. In view of the touch display device 200 as a whole, the touch display device 200 is a structure that does not bend or warp, but the second surface 101B (inner surface) of the outer cover 101 has a concave shape design, and allow the touch sensing element 110 to be conformably attached under this concave shape; The fourth surface 105B (inner surface) of 105 has a concave shape design, which allows the gap 113 surrounded by the glue 111 between the display element 120 and the touch sensing element 110 to have a height at the center greater than that at the periphery In this way, it can effectively prevent the parts located above the glue 111 from contacting the parts below the glue 111, thereby preventing the Newton ring phenomenon from occurring in the touch display device 200, thereby improving the performance of the touch display device 200. Display picture quality.

Although the present invention has disclosed the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and changes without departing from the spirit and scope of the present invention, so the protection scope of the present invention When depending on the scope defined by the appended claims shall prevail.

Claims (15)

1. A touch display device, comprising: A protective cover having a first surface and a second surface opposite the first surface; a touch sensing element is arranged under the second surface; a display element disposed under the touch sensing element; and a word glue, arranged between the touch sensing element and the display element, and surrounding to form a gap; Wherein, the height at the center of the gap is greater than the height at the periphery of the gap. 2. The touch display device as claimed in claim 1, wherein the second surface of the protective cover is a flat surface. 3. The touch display device as claimed in claim 1, wherein the second surface of the protective cover is a concave surface. 4. The touch display device according to claim 3, wherein the concave surface is an arc concave surface or an arch concave surface. 5. The touch display device as claimed in claim 1, wherein the touch sensing element comprises a touch sensing layer and a protective layer. 6. The touch display device as claimed in claim 1, wherein the touch sensing element comprises a substrate having a third surface and a fourth surface opposite to the third surface. 7. The touch display device as claimed in claim 6, wherein the fourth surface of the substrate is a concave surface. 8. The touch display device as claimed in claim 7, wherein the concave surface is an arc concave surface or an arch concave surface. 9. The touch display device as claimed in claim 6, wherein the touch sensing element comprises a touch sensing layer formed above the third surface. 10. The touch display device as claimed in claim 6, wherein the touch sensing element comprises a touch sensing layer formed under the fourth surface. 11. The touch display device as claimed in claim 1, wherein the thickness of the sticker is less than or equal to 0.3mm. 12. The touch display device as claimed in claim 1, wherein the height at the center of the gap is at least 0.2 mm larger than the height at the periphery of the gap. 13 . The touch display device as claimed in claim 1 , wherein the height at the center of the gap is greater than the height at the periphery of the gap by 0.2 mm to 5 mm. 14 . 14. A protective cover for a touch display device according to any one of claims 1 to 13, the protective cover has a flat surface and a concave surface, wherein the concave surface is an arc concave surface or an arch Concave. 15. A device for attaching a touch display device according to any one of claims 1 to 13, comprising: a first tray having a recess to carry a protective cover; and A second tray has a recessed portion to carry a touch sensing element; wherein, the recessed portion of the second tray is opposite to the recessed portion of the first tray, and the recessed portion of the second tray The bottom surface is a curved convex surface.

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