TWI721738B - Display device and touch display device - Google Patents

Abstract

The present disclosure provides a display device including: a display module for image display; a transparent cover plate stacked on the display module; a first bonding portion between the cover plate and the display module to bond the cover plate and the display module, wherein the first bonding portion is located along the edge of the display module; the first bonding portion, the cover plate, and the display module cooperate to form a receiving space, the first bonding portion is provided with at least one glue injection opening and at least one limiting channel communicating with the receiving space; and a second bonding portion for bonding the cover plate and the display module, the second bonding portion is located in the receiving space. The present disclosure also provides a touch display device.

Description

Display device and touch display device

The present invention relates to the field of touch display, in particular to a display device and a touch display device.

Direct bonding is an abbreviation for a bonding process, which is a process of directly bonding a touch panel and a display panel (usually a liquid crystal display panel) together to form a touch display module. Compared with the traditional air bond method, the above-mentioned full bonding method enables the structure of the touch display module to have better optical characteristics and a clear picture. Conventional vehicle-mounted display modules usually have an outer protective frame. The outer protective frame causes specific size requirements for the glue when bonding. Therefore, when the full bonding method is adopted, liquid optical glue is often used to achieve bonding. However, the injection amount of the liquid optical glue is not easy to control. When the liquid glue is injected excessively, on the one hand, it overflows from the injection port and needs to be cleaned, on the other hand, it is not conducive to the discharge of bubbles.

One aspect of the present invention provides a display device, including: a display module for image display; a transparent cover plate laminated on the display module; a first bonding part located on the cover plate and the Between the display modules, for bonding the cover plate and the display module, the first bonding portion is provided along the edge of the display module and is connected to the cover plate and the display module. Grouping and enclosing to form a receiving space, the first fitting part is provided with at least one glue injection opening and at least one limiting channel communicating with the containing space; and a second fitting part for fitting the place For the cover plate and the display module, the second bonding portion is located in the receiving space, the at least one glue injection opening is used for injecting liquid glue, and the liquid glue is cured to form the second bonding Part, the at least one limiting channel is used to limit the injection volume of the liquid glue.

Another aspect of the present invention provides a touch display device, including: The display module is used for image display; the touch module is stacked with the display module for sensing touch operation; the first bonding part is located on the touch module and the display Between the modules, for bonding the touch module and the display module, and the first bonding portion is arranged along the edge of the display module and is connected to the touch module and the display module. The display module is enclosed to form a receiving space, the first bonding portion is provided with at least one glue injection opening and at least one limiting channel communicating with the receiving space; and a second bonding portion for bonding The touch module and the display module are combined, the second bonding portion is located in the receiving space, and the at least one glue injection opening is used for injecting liquid glue, and the liquid glue is cured to form the The second bonding part, the at least one limiting channel is used to limit the injection amount of the liquid glue.

The above-mentioned display device includes a display module and a cover plate. The display module and the cover plate are bonded by the first bonding part and the second bonding part, and the second bonding part is formed by curing the injected liquid glue, by By setting the limit channel on the first bonding part, the injection amount of the liquid glue can be easily and conveniently limited.

10: Display device

11, 21: cover

111: Surface

12, 23: display module

121: liquid crystal layer

122: Backlight assembly

123: Outer Frame

13, 24: The first bonding part

131: The first pressure-sensitive adhesive layer

132: The first primer layer

133: Rubber layer

134: The second primer layer

135: The second pressure sensitive adhesive layer

136: Glue injection opening

137: Exhaust opening

138: Slope

139: limit channel

14, 25: The second bonding part

16: Sealant layer

20: Touch display device

22: Touch module

30: Containment Space

d: distance

FIG. 1 is a schematic diagram of the three-dimensional structure of the display device in the first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional structure diagram of the display device in FIG. 1 along the line II-II.

3 is a schematic diagram of the laminated structure of the first bonding part in FIG. 2.

FIG. 4 is a schematic diagram of a plan structure of the first bonding portion and the display module in FIG. 2.

5 is a schematic diagram of a plan structure of the first bonding portion and the display module in a modified embodiment of the present invention.

6 is a schematic diagram of a plan structure of the first bonding portion and the display module in another modified embodiment of the present invention.

FIG. 7 is a schematic diagram of a plan structure of the first bonding portion and the display module in another modified embodiment of the present invention.

FIG. 8 is a schematic diagram of the three-dimensional structure of the touch display device in the second embodiment of the present invention.

Fig. 9 is a schematic cross-sectional structure diagram taken along line IX-IX in Fig. 8.

Example one

The display device provided in this embodiment is suitable for a small screen display device in a vehicle. Please refer to FIG. 1, the display device 10, the display module 12 and the cover 11 laminated on the display module 12 are provided in this embodiment. The surface 111 of the cover 11 away from the display module 12 serves as a display surface, and the user views the image displayed by the display module 12 through the surface 111. In this embodiment, the display module 12 is a liquid crystal display module. In other embodiments, the display module 12 may also be a self-luminous display module or an organic light-emitting display module, etc., which is not limited in the present invention.

Please refer to FIG. 2, the display device 10 provided in this embodiment further includes a first bonding portion 13 and a second bonding portion 14. The first bonding portion 13 and the second bonding portion 14 are located between the cover plate 11 and the display module 12 for bonding the cover plate 11 and the display module 12. The display module 12 includes a liquid crystal layer 121, a backlight assembly 122 and an outer frame 123 partially covering the liquid crystal layer 121 and the backlight assembly 122 stacked on each other. The outer frame 123 is an iron frame, and its side close to the cover 11 is partially covered with the liquid crystal layer 121. The first bonding portion 13 directly adheres to the outer frame 123 and the cover 11, and the liquid crystal layer 121 is directly borrowed from the exposed position of the outer frame 123. The second bonding portion 14 is bonded to the cover plate 11.

3, in this embodiment, the first bonding portion 13 is a double-sided adhesive, which is composed of a first pressure-sensitive adhesive layer 131, a first primer layer 132, a rubber layer 133, and a second primer layer stacked in sequence. The layer 134 and the second pressure-sensitive adhesive layer 135 are formed. Among them, the first primer layer 132 and the second primer layer 134 are adhesion promoters used to improve adhesion. Due to the low surface tension of the rubber layer 133, the first pressure-sensitive adhesive layer 131 and the second pressure-sensitive adhesive layer The adhesion between 135 and the rubber layer 133 is less than 5N/25mm, the first primer layer 132 and the second primer layer 134 can reinforce the first pressure-sensitive adhesive layer 131 and the second pressure-sensitive adhesive layer 135 and the rubber layer 133 The adhesive force between them is above 2N/25mm.

Referring to FIG. 4, in this embodiment, the first bonding portion 13 is disposed along the edge of the display module 12, specifically, the first bonding portion 13 is disposed along the edge of the outer frame 123. In this embodiment, the distance d between the outer contour of the first bonding portion 13 and the outer contour of the outer frame 123 is 0.5 to 1 mm, and along the thickness direction of the display device 10, the projection of the first bonding portion 13 on the outer frame 123 Located within the outer contour of the outer frame 123.

Please refer to FIG. 1 again, the first bonding portion 13 is sandwiched between the cover plate 11 and the display module 12 and cooperates with the cover plate 11 and the display module 12 to form a receiving space 30. Please refer to FIG. 4 again. In this embodiment, the first bonding portion 13 is a rectangular ring, the receiving space 30 is rectangular, and the second bonding portion 14 is located in the receiving space 30. In this embodiment, the second bonding portion 14 It is formed by solidification of liquid glue. In this embodiment, the first bonding portion 13 is provided with a plurality of glue injection openings 136, and each glue injection opening 136 is connected to the receiving space 30. The liquid glue is injected into the above-mentioned receiving space 30 from each glue injection opening 136, and after curing, a second bonding portion 14 is formed to bond the display module 12 and the cover 11.

The display device 10 provided in this embodiment further includes a flexible circuit board (not shown in the figure), and the flexible circuit board is disposed on the side of the first bonding portion 13 where a plurality of glue injection openings 136 are opened. Since the width of the frame on the side where the plurality of glue injection openings 136 are opened on the first bonding portion 13 is larger, there is a larger space for the installation of the flexible circuit board, which can effectively prevent the flexible circuit board from affecting the area of the display device 10 for displaying images .

Further, in this embodiment, the first bonding portion 13 is also provided with a plurality of exhaust openings 137, and each exhaust opening 137 is connected to the containing space 30, because the liquid glue is liquid during the process of being injected into the containing space 30 , It is easy to generate bubbles during the flow process, which affects the bonding effect. Therefore, the provision of a plurality of exhaust openings 137 facilitates the discharge of bubbles and enhances the bonding strength between the display module 12 and the cover plate. In this embodiment, the plurality of plastic injection openings 136 and the plurality of exhaust openings 137 are all opened on the first side wall of the first bonding portion 13, so that the opening of the plurality of exhaust openings 137 does not affect the capacity of the receiving space 30 (in the opening The position liquid glue will overflow). In this embodiment, the plurality of exhaust openings 137 can also be used for injecting liquid glue. When some of the exhaust openings 137 in the plurality of exhaust openings 137 are used for injecting liquid glue, the remaining exhaust openings 137 are used for exhausting.

Please continue to refer to FIG. 4, the first side wall on the first bonding portion 13 has an outer surface and an inner surface opposite to the outer surface. The inner surface is configured to include a plurality of inclined surfaces 138, and each inclined surface 138 is opposite to each other. The outer surface is inclined, and the inclined directions of the inclined surfaces 138 relative to the outer surface are not all the same. The arrangement of the plurality of inclined surfaces 138 allows the liquid glue to flow along the inclination trend of the inclined surfaces, which facilitates the discharge of air bubbles and avoids residual air bubbles from affecting the bonding effect of the display module 12 and the cover plate. Please refer to FIG. 5, in another embodiment of the present invention, the inner surface of the first side wall on the first bonding portion 13 is set as an inclined surface inclined relative to the outer surface (inclined in the direction of the dashed line in FIG. 5).

Still further, please continue to refer to 4. In this embodiment, the first bonding portion 13 is also provided with two limiting channels 139 communicating with the accommodating space 30, and the two limiting channels 139 are used to limit the injection volume of the liquid glue. Specifically, because the injection volume of the liquid glue exceeds the two limit channels 139, it will overflow from the limit channel 139. The two limit channels 139 are used to make the injection amount of the liquid glue below the opening of the two limit channels 139 ( Below the dotted line in Figure 4). Two limiting channels 139 are respectively opened on the second side wall and the third side wall of the first bonding portion 13, and the second side wall and the third side wall are disposed oppositely and adjacently connected to the first side wall. Moreover, in this embodiment, the two limiting channels 139 are located at symmetrical positions on the first bonding portion 13, so that the heights defined by the two limiting channels 139 are the same.

Please continue to refer to FIG. 4. In this embodiment, the two limit channels 139 extend linearly. Moreover, in this embodiment, the channel shapes of the two limiting channels 139 are the same, and the extension direction of the two limiting channels 139 is inclined relative to the first side wall on the first bonding portion 13, and the extension direction is relative to the first bonding part. The inclination direction of the first side wall on the portion 13 is set such that the limit height of the end of the limit channel 139 close to the containing space 30 is lower than the limit height of the end of the limit channel 139 away from the containing space 30 (the limit of the limit channel 139 The position height is defined as the distance between the limit channel 139 and the side wall opposite to the first side wall on the first bonding portion 13). The above-mentioned extension direction of the limit channel 139 makes it difficult for the liquid glue to overflow from the limit channel 139 during the injection of the liquid glue.

Referring to FIG. 6, in a modified embodiment of the present invention, the two limiting channels 139 extend non-linearly. Specifically, the channel shapes of the two limiting channels 139 are the same, and the extension trajectories of the channels of the two limiting channels 139 It is a curve. Due to the change of the slope of the curved surface, the height of the limit channel 139 is different, causing fluctuations, which is also beneficial to make the liquid glue not easily overflow from the limit channel 139 during the injection of the liquid glue.

Referring to FIG. 7, in another modified embodiment of the present invention, the two limiting channels 139 also extend non-linearly. Specifically, the channel shapes of the two limiting channels 139 are the same, and the extension trajectory of each limiting channel 139 is one The zigzag line is similar to the embodiment shown in FIG. 6. In this embodiment, the height of the limit channel 139 is different, which also helps to prevent the liquid glue from overflowing from the limit channel 139 during the injection of the liquid glue.

2 again, the display device 10 provided in this embodiment further includes a sealant layer 16 disposed between the outer frame 123 of the display module 12 and the second bonding portion 14. The second bonding portion 14 is It is formed by solidification of liquid glue. The liquid glue is liquid during the injection process and has good fluidity. The sealant layer 16 helps prevent the liquid glue from flowing toward the inside of the display module 12 and protects the internal structure of the display module 12 .

Therefore, the display device 10 provided in this embodiment includes the display module 12 and the cover 11, and the display module 12 and the cover 11 are bonded by the first bonding portion 13 and the second bonding portion 14, because the second bonding portion 13 and the second bonding portion 14 are bonded to the display module 12 and the cover 11. The bonding portion 14 is formed by solidifying liquid glue, which is a liquid that can flow when injected between the display module 12 and the cover plate 11. By providing a limiting channel 139 on the first bonding portion 13, it is convenient Simply limit the injection volume of liquid glue. Moreover, by setting the extension track of the limit channel 139, the liquid glue is not easy to overflow.

Example two

Please refer to FIG. 8, the touch display device 20 provided in this embodiment differs from the display device 10 of the first embodiment mainly in that it further includes a touch module 22.

Please continue to refer to FIG. 8. The touch display device 20 of this embodiment includes a cover 21, a touch module 22, and a display module 23 stacked in sequence. Please refer to FIG. 9, the touch module 22 and the display module 23. The module 23 is bonded to the second bonding part 25 via the first bonding part 24. In this embodiment, the first bonding portion 24 is any of the first bonding portions 13 described in the first embodiment, and the second bonding portion 25 is also the same as any of the second bonding portions described in the first embodiment. 14. I won’t repeat it here.

The touch display device 20 provided in this embodiment can achieve all the beneficial effects as described in the first embodiment; on this basis, the touch display device 20 provided in this embodiment further includes a touch module 22, which can sense Measure the user's touch operation.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, and not to limit the present invention. As long as they fall within the essential spirit of the present invention, the above embodiments are appropriately made. Changes and changes fall within the scope of protection of the present invention.

12: Display module

123: Outer Frame

13: The first fitting part

136: Glue injection opening

137: Exhaust opening

138: Slope

139: limit channel

14: The second fitting part

d: distance

Claims (9)

A display device includes: a display module for image display; a transparent cover plate laminated on the display module; a first bonding part located between the cover plate and the display module Between, for bonding the cover plate and the display module, the first bonding portion is arranged along the edge of the display module and is formed by cooperating with the cover plate and the display module An accommodating space, the first affixing part is provided with at least one glue injection opening and at least one limiting channel communicating with the accommodating space; and a second affixing part for affixing the cover plate and the housing In the display module, the second bonding portion is located in the accommodating space, the at least one glue injection opening is used to inject liquid glue, and the liquid glue is cured to form the second bonding portion, and the at least A limiting channel is used to limit the injection volume of the liquid glue; the first bonding part is a rectangular ring, the at least one glue injection opening is opened on the same side wall of the first bonding part, and the at least A limiting channel is formed on the side wall adjacent to the side where the at least one glue injection opening is formed on the first bonding part. The display device according to claim 1, wherein each limit channel extends non-linearly. The display device according to claim 1, wherein at least one exhaust opening is also opened on the first bonding portion. The display device according to claim 3, wherein the at least one glue injection opening and the at least one exhaust opening are located on the same side wall of the first bonding part. The display device according to claim 4, wherein the side of the first bonding portion provided with the at least one glue injection opening and the at least one exhaust opening has an outer surface and a side opposite to the outer surface. The inner surface, the outer surface is a flat surface, and the inner surface is inclined relative to the outer surface. The display device according to claim 4, wherein the inner surface of the side on which the at least one glue injection opening and the at least one exhaust opening is provided on the first bonding portion includes an outer surface inclined with respect to the side The inclination directions of the plural inclined planes relative to the outer surface are not all the same. The display device according to claim 4, wherein the first bonding part is provided with two limiting channels, and the two limiting channels are respectively opened on two opposite sides of the first bonding part. The display device according to claim 7, wherein the two limiting channels have the same shape and are symmetrically arranged on the first bonding portion. A touch display device includes: For example, a display device according to any one of claim items 1 to 8, wherein the display device has a display module for image display; a touch module, which is stacked with the display module and is used for sensing Touch operation; a first bonding part, located between the touch module and the display module, for bonding the touch module and the display module, the first bonding part Is arranged along the edge of the display module and cooperates with the touch module and the display module to form an accommodating space, and the first bonding part is provided with at least A glue injection opening and at least one limiting channel; and a second bonding part for bonding the touch module and the display module, the second bonding part is located in the accommodating space, The at least one glue injection opening is used for injecting liquid glue, the liquid glue is cured to form the second bonding portion, and the at least one limiting channel is used for limiting the injection amount of the liquid glue.

Images