TWI452386B - Touch display device, touch panel and manufacturing method thereof - Google Patents

Description

Touch display device, touch panel and manufacturing method thereof

The present invention relates to a touch display device, a touch panel, and a method of fabricating the same, and more particularly to a touch panel display device using a single glass solution (OGS), a touch panel, and a manufacturing method thereof .

In today's various types of consumer electronics, touch panels are widely used in portable electronic products such as tablets, personal digital assistants (PDAs), mobile phones, satellite navigation systems (GPS) and video players. (touch panel), as a communication interface for human-machine data, thereby saving the volume of electronic products.

In the structure of the external touch display device, the touch panel and the display panel are separately manufactured separately, and the touch panel is attached to the surface of the display panel. In a conventional external touch panel, the touch electrode layer is first formed on a transparent substrate to form a touch sensing substrate, and then a protective substrate having a light shielding layer is attached to the touch sensing substrate. To protect the touch electrodes.

Please refer to FIG. 1 . FIG. 1 is a schematic cross-sectional view of a conventional touch sensing substrate. As shown in FIG. 1 , the conventional touch sensing substrate 10 includes a transparent substrate 12 , a touch electrode layer 14 , a driving circuit chip 16 , and a flexible circuit board 18 . The transparent substrate 12 has a display area 12a and a peripheral area 12b, and the light shielding layer of the protection substrate corresponds to the peripheral area 12b for shielding the circuit elements of the peripheral area 12b. The touch electrode layer 14 is disposed on the transparent substrate 12, and the driving circuit chip 16 and the flexible circuit board 18 are disposed on the touch electrode layer 14 to transmit the signal sensed by the touch electrode layer 14 to the display panel. In the conventional touch sensing substrate 10, the touch electrode layer 14 in the peripheral region 12b is provided with a first alignment pattern 20 for positioning the pad, and the lower surface of the driving circuit wafer 16 also has a The second alignment pattern. Therefore, in the process of solidifying the driving circuit chip 16 on the touch electrode layer 14 , the image sensing device 22 located under the transparent substrate 12 can sequentially identify the bonding pad by the first alignment pattern 20 . The location and the location of the driver circuit wafer 16 are identified by the second alignment pattern, and then the driver circuit wafer 16 is affixed to the pad.

With the thin and light touch display device, a touch panel with a single-chip glass touch solution has been developed, which mainly uses the touch electrode layer directly on the protective substrate to omit the weight of the transparent substrate, thereby reducing the touch. The weight of the control panel can avoid reducing the display brightness of the touch display device due to too much substrate. However, the light shielding layer on the protective substrate corresponds to the driving circuit chip and the flexible circuit board on the touch electrode layer for shielding the driving circuit chip and the flexible circuit board, and the light shielding layer also shields the first layer of the touch electrode layer. The alignment pattern, so when the driver circuit wafer is crystallized on the pad, the image sensing device under the protection substrate cannot recognize the first alignment pattern of the touch electrode layer, and the driver circuit chip cannot be accurately fixed to the solder. On the mat.

One of the main purposes of the present invention is to provide a touch display device, a touch panel, and a method of fabricating the same, to solve the problem that the driver circuit wafer cannot be accurately fixed on the pad.

To achieve the above object, the present invention provides a touch panel. The touch panel includes a transparent substrate, a light shielding layer, and a circuit module. The transparent substrate has a display area and a peripheral area surrounding one of the display areas. The light shielding layer is located in the peripheral area, and the light shielding layer has a light shielding portion and at least two alignment portions, wherein each of the alignment portions is connected to the light shielding portion and protrudes toward the display region. The circuit module is disposed on one side of the light shielding layer.

To achieve the above object, the present invention provides a touch display device. The touch display device includes a display panel and a touch panel. The display panel has a display area and a peripheral area surrounding one of the display areas. The touch panel is disposed on one side of the display panel and corresponding to the display panel. The touch panel includes a transparent substrate, a light shielding layer, and a circuit module. The light shielding layer is located in the peripheral area, and the light shielding layer has a light shielding portion and at least two alignment portions, wherein each of the alignment portions is connected to the light shielding portion and protrudes toward the display region. The circuit module is disposed between the transparent substrate and the display panel.

To achieve the above object, the present invention provides a method of fabricating a touch panel. First, a circuit module is provided, and then the circuit module is moved to above the at least two image sensing devices, and the circuit module is positioned by using an image sensing device. Then, the touch substrate includes a transparent substrate and a light shielding layer, and the transparent substrate has a display area and a peripheral area surrounding the display area, wherein the light shielding layer is located in the peripheral area, and has a light shielding portion and at least The two alignment portions are connected to the light shielding portion and protrude toward the display area. Then, the touch substrate is moved between the circuit module and the image sensing devices, and the touch sensing substrate is positioned by the image sensing devices.

The invention provides at least two alignment portions on the light shielding layer of the touch panel, so that the alignment portion can be respectively recognized by the image sensing device when positioning the touch substrate, so as to locate the touch substrate, and then the circuit module can be Precisely soldered to the touch substrate.

Please refer to FIG. 2 to FIG. 4 , FIG. 2 to FIG. 4 are schematic diagrams showing a method for fabricating a touch panel according to a preferred embodiment of the present invention, wherein FIG. 4 is a touch diagram of the first preferred embodiment of the present invention. Schematic diagram of the panel. 2 to 4 are merely schematic for easier understanding of the present invention, and the detailed ratios thereof can be adjusted according to the needs of the design. As shown in FIG. 2, the circuit module 102 is provided, and the circuit module 102 has at least two alignment patterns 102a on the lower surface of the circuit module 102. Also, the alignment pattern 102a has a first center point 102b. Next, the circuit module 102 is moved over the at least two image sensing devices 104 to face the image sensing device 104, and each of the image sensing devices 104 is used to detect each of the alignment patterns 102a. To locate the first center point 102b of the alignment pattern 102a, thereby positioning the position of the circuit module 102. In the embodiment, the circuit module 102 is a driving circuit chip, but is not limited thereto. The circuit module of the present invention can also be a circuit board.

As shown in FIG. 3, a touch substrate 106 is further provided. The touch substrate 106 includes a transparent substrate 108, a light shielding layer 110 and an electrode layer 112, and the transparent substrate 108 has a display area 108a and a peripheral area 108b surrounding the display area 108a. . In this embodiment, the light shielding layer 110 is disposed on the transparent substrate 108 of the peripheral region 108b, and has a light shielding portion 110a and at least two alignment portions 110b. Each of the alignment portions 110b is connected to the light shielding portion 110a and protrudes toward the display region 108a, and the alignment portion 110b has a second center point 110c. In addition, the electrode layer 112 is disposed on the light shielding layer 110, and the electrode layer 112 includes a plurality of pads. Then, the touch substrate 106 is moved between the circuit module 102 and the image sensing device 104, so that the light shielding layer 110 is located between the image sensing device 104 and the electrode layer 112, and then the image sensing devices 104 are respectively used by the image sensing devices 104. Each of the alignment portions 110b is detected to locate the second center point 110c of the alignment portion 110b, thereby positioning the position of the touch substrate 106. At this time, the second center point 110c of the alignment portion 110b is located between the first center point 102b of the alignment pattern 102a and the image sensing device 104. Further, since each of the pads is fixed to the light shielding layer 110, the distance between the second center point 110c of the alignment portion 110b and each of the pads is fixed. Therefore, when the second center point 110c of the alignment portion 110b is located, the position of each pad can be located by calculating the distance between the second center point 110c of the alignment portion 110b and each pad. The circuit module 102 is precisely soldered to each of the pads. In addition, the light shielding layer 110 of the present invention is not limited to be disposed between the electrode layer 112 and the transparent substrate 108, and the transparent substrate 108 of the present invention may be disposed between the electrode layer 112 and the light shielding layer 110.

As shown in FIG. 4, the circuit module 102 is then moved over the pad and the circuit module 102 is soldered to the pad of the touch substrate 106. Then, the circuit board 114 is bonded to the electrode layer 112 of the touch substrate 106 to electrically connect the circuit board 114 to the circuit module 102 and the electrode layer 114. The touch panel 100 of the present embodiment has been completed so far. It is to be noted that, since the light shielding layer 110 has at least two alignment portions 110b, which can be respectively recognized by the image sensing device 104, the touch substrate 106 can be positioned by positioning the alignment portion 110b of the light shielding layer 110. Out. Therefore, when the step of positioning the touch substrate 106 is performed, the light shielding layer 110 is located between the electrode layer 112 and the image sensing device 104, so that the image sensing device 104 can avoid the placement of the alignment mark on the electrode layer 112. The situation of the alignment mark cannot be detected.

In order to clearly explain the structure of the touch panel of this embodiment, please refer to FIG. 5 and refer to FIG. 4 together. FIG. 5 is a top plan view of a touch panel according to a first preferred embodiment of the present invention. As shown in FIG. 4 and FIG. 5 , the touch panel 100 includes a transparent substrate 108 , a light shielding layer 110 , an electrode layer 112 , a circuit module 102 , and a circuit board 114 . The transparent substrate 108 has a display area 108 a and a surrounding display area 108 a . The peripheral area 108b. The transparent substrate 108 is used as a substrate for fabricating the circuit elements of the touch panel 100, and the transparent substrate 108 may be formed of a transparent material such as glass or plastic in order to have a good light transmission effect, but is not limited thereto. In this embodiment, the light shielding layer 110 is disposed on one side of the transparent substrate 108 of the peripheral region 108b, and the circuit module 102 is disposed on the other side of the light shielding layer 110 of the peripheral region 108b with respect to the transparent substrate 108. The electrode layer 112 is disposed between the light shielding layer 110 of the peripheral region 108b and the circuit module 102, and extends to the transparent substrate 108 of the display area 108a for sensing the touch panel 100 of an object touching the display area 108b. , and generate a touch signal. The circuit module 102 is electrically connected to the electrode layer 112, and the circuit board 114 is disposed on the electrode layer 112 and electrically connected to the circuit module 102 for transmitting the touch signal sensed by the electrode layer 112 to Display panel or a control unit.

In addition, the light shielding portion 110a of the light shielding layer 110 surrounds the display area 108a for shielding the circuit module 102 located in the peripheral area 108b, and the light shielding portion 110a has an inner side 116 and an outer side 118. In order for the light shielding portion 110b to effectively shield the display panel of the peripheral region 108b from the circuit components of the touch panel 100, the outer side 118 of the light shielding portion 100b is preferably aligned with the side of the transparent substrate 108. In addition, each of the alignment portions 110b is connected to the inner side 116 of the light shielding portion 110 for positioning the position of the light shielding layer 110. In other words, each of the alignment portions 110b protrudes from the inner side 116 of the light shielding portion 110a toward the display region 108a, so that the alignment portion 110b can be detected by the image sensing device 104, respectively, and the alignment is detected. The position of the portion 110b positions the position of the electrode layer 112 provided on the light shielding layer 110. In this embodiment, the two alignment portions 110b are arranged along the first direction 120 and have a second center point 110c, and the first center point 102 and the second center point 110c are located in the second direction perpendicular to the first direction 120. 122. However, the number of the alignment portions 110b of the present invention is not limited to two, and may be plural, and two or two are a group, and each of the alignment portions 110b corresponds to each of the pads 112a. In addition, the light shielding layer 110 may be formed of an opaque material such as a black photoresist, but is not limited thereto, and the shape of each of the alignment portions 110b may be a geometric shape such as a rectangle, a triangle, a circle, or a wave to facilitate an image sense. The measuring device 104 recognizes.

In the present embodiment, the pads 112a of the electrode layer 112 are arranged along the first direction 120, and each pad 112a has two long sides 124 and two short sides 126 and has a third center point 128. The short side 126 is parallel to the first direction 120, and the long side 124 is parallel to the second direction 122 such that the long side 124 of each pad 112a is perpendicular to the first direction 120. However, the second direction 122 of the present invention is not limited to being perpendicular to the first direction 120, and the short side 126 of the present invention is not limited to being parallel to the first direction 120, that is, the short side 126 of each pad 112a is not limited to being parallel to the pair. The arrangement direction of the bit portions 110b. It should be noted that the second center point 110c of the embodiment is aligned with the third center point 128 along the second direction 122, so that the circuit module 102 is positioned at the first center point 102b and the alignment portion of the alignment pattern 102a. The second center point 110c of 110b can be soldered to the pad 112a only after moving the distance in the second direction 122, thereby reducing the error of the mobile circuit module 102, thereby more accurately soldering the circuit module 102 to the circuit module 102. On the pad 112a. Moreover, since the long side 124 parallel to the second direction 122 is larger than the short side 126 parallel to the first direction 120, the width of each of the pads 112a in the second direction 122 allows the circuit module 102 to have a large displacement error. Thereby, the defect rate of soldering the circuit module 102 to the pad 112a can be reduced. In addition, the electrode layer 112 of the present embodiment may be formed of a transparent conductive material such as indium zinc oxide or indium tin oxide, but is not limited thereto. The circuit module 102 of the present embodiment is a driving circuit chip, and the alignment pattern 102a is located on the surface of the circuit module 102 facing the light shielding layer 110, that is, the lower surface of the circuit module 102, so that the image sensing device 104 The position of the circuit module 102 can be located by detecting the position of the alignment pattern 102a. The circuit module 102 of the present invention is not limited to a driving circuit chip, and may also be a circuit board for transmitting signals sensed by the electrode layer 112 to the outside. In addition, the inner side 116 of the light shielding portion 110a can be divided into a long inner side 116a parallel to the first direction 120 and a short inner side 116b parallel to the second direction 122. Further, the alignment portion 110b is connected to the long inner side 116a of the light shielding portion 110a, but the alignment portion 110b of the present invention is not limited to being connected to the long inner side 116a, but may be connected to the short inner side 116b. Arranged along the second direction 122 or at any of the inner sides 116 of the light shielding portion 110a. The long inner side 116a and the short inner side 116b of the present invention are not limited to being parallel to the first direction 120 and the second direction 122, respectively, or vice versa.

As can be seen from the above, the light shielding layer 110 is located between the electrode layer 112 and the image sensing device 104 during the step of positioning the touch substrate 106, so that the image sensing device 104 cannot detect the electrode layer 112. Therefore, the light shielding layer 110 of the touch panel 100 of the present embodiment has the at least two alignment portions 110b protruding from the light shielding portion 110a, so that the alignment portion 110b can be recognized by the image sensing device 104, respectively. Thereby, each of the pads 112a can be positioned by positioning the alignment portion 110b of the light shielding layer 110 to further solder the circuit module 102 to the pad 112a.

The touch panel of the present invention is not limited to the above embodiment. The other embodiments and variations of the present invention are described in the following, and the same reference numerals will be used to refer to the same elements, and the repeated parts will not be described again.

Please refer to FIG. 6. FIG. 6 is a cross-sectional view of a touch panel according to a second preferred embodiment of the present invention. As shown in FIG. 6 , the light-shielding layer 202 of the touch panel 200 of the present embodiment is disposed on the other side of the transparent substrate 108 of the peripheral region 108 b relative to the circuit module 102 to be transparent. The substrate 108 is located between the light shielding layer 202 and the circuit module 102, and the electrode layer 112 is directly in contact with the transparent substrate 108.

According to the touch panel of the above embodiment, the present invention provides a touch display device. Please refer to FIG. 7. FIG. 7 is a cross-sectional view of a touch display device according to a preferred embodiment of the present invention. As shown in FIG. 7 , the touch display device 300 includes a display panel 302 , a touch panel 100 , and a transparent adhesive 304 . The display panel 302 has a display area 302a and a peripheral area 302b surrounding the display area 302a, and the display area 302a of the display panel 302 corresponds to the display area 108a of the touch panel 100, and the peripheral area 302b of the display panel 302 corresponds to the touch panel. In the peripheral area 108b of the 100, the light shielding layer 110 of the touch panel 100 can shield the peripheral circuit of the display panel 302, and the screen displayed by the display panel 302 is not blocked by the circuit components of the touch panel 100. The display panel 302 includes a color filter substrate 306, an array substrate 308, and a liquid crystal layer 310. The color filter substrate 306 is disposed opposite to the array substrate 308, and the liquid crystal layer 310 is disposed on the color filter substrate 306 and the array substrate. Between 308. The touch panel 100 is disposed on one side of the display panel 302 and is disposed on the display panel 302. The light shielding layer 110, the electrode layer 112, the circuit module 102, and the circuit board 114 of the touch panel 100 are disposed on the transparent substrate 108. Between the display panels 302, the transparent substrate 108 can serve as a substrate for protecting the light shielding layer 110, the electrode layer 112, the circuit module 102, and the circuit board 114 of the touch panel 100. The transparent adhesive 304 is disposed between the touch panel 100 and the display panel 302 for combining the touch panel 100 and the display panel 302. The transparent adhesive 304 may be an optical clear adhesive (OCA) to prevent the brightness of the screen displayed by the display panel 302 from being affected, but is not limited thereto. In addition, the touch panel of the touch display device of the present invention is not limited to the touch panel 100 of the first embodiment, and may be the touch panel 200 of the second embodiment.

In summary, the present invention provides at least two alignment portions on the light shielding layer of the touch panel, so that the alignment portion can be separately recognized by the image sensing device when positioning the touch substrate, thereby positioning the light shielding layer relative to the image. The pads on the other side of the sensing device are used to further accurately solder the circuit module to the pad.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10. . . Touch sensing substrate

12. . . Transparent substrate

12a. . . Display area

12b. . . Surrounding area

14. . . Touch electrode layer

16. . . Drive circuit chip

18. . . Flexible circuit board

20. . . First alignment pattern

twenty two. . . Image sensing device

100. . . Touch panel

102. . . Circuit module

102a. . . Alignment pattern

102b. . . First center point

104. . . Image sensing device

106. . . Touch substrate

108. . . Transparent substrate

108a. . . Display area

108b. . . Surrounding area

110. . . Shading layer

110a. . . Shading

110b. . . Counterpoint

110c. . . Second center point

112. . . Electrode layer

112a. . . Solder pad

114. . . Circuit board

116. . . Medial side

116a. . . Long inside side

116b. . . Short inner side

118. . . Outer side

120. . . First direction

122. . . Second direction

124. . . The long side

126. . . Short side

128. . . Third center point

200. . . Touch panel

202. . . Shading layer

300. . . Touch display device

302. . . Display panel

302a. . . Display area

302b. . . Surrounding area

304. . . Transparent glue

306. . . Color filter substrate

308. . . Array substrate

310. . . Liquid crystal layer

FIG. 1 is a schematic cross-sectional view of a conventional touch sensing substrate.

2 to 4 are schematic views showing a method of fabricating a touch panel according to a preferred embodiment of the present invention.

FIG. 5 is a top plan view of a touch panel according to a first preferred embodiment of the present invention.

FIG. 6 is a cross-sectional view of a touch panel according to a second preferred embodiment of the present invention.

FIG. 7 is a cross-sectional view of a touch display device according to a preferred embodiment of the present invention.

100. . . Touch panel

102. . . Circuit module

102a. . . Alignment pattern

102b. . . First center point

108a. . . Display area

108b. . . Surrounding area

110a. . . Shading

110b. . . Counterpoint

110c. . . Second center point

112. . . Electrode layer

112a. . . Solder pad

114. . . Circuit board

116. . . Medial side

116a. . . Long inside side

116b. . . Short inner side

118. . . Outer side

120. . . First direction

122. . . Second direction

124. . . The long side

126. . . Short side

128. . . Third center point

Claims (15)

A touch panel includes: a transparent substrate having a display area and a peripheral area surrounding the display area; a light shielding layer located in the peripheral area, and the light shielding layer has a light shielding portion and at least two alignment portions, wherein Each of the alignment portions is connected to the light shielding portion and protrudes toward the display region; a circuit module is disposed on one side of the light shielding layer, and the circuit module has at least two alignment patterns; and an electrode layer Provided between the transparent substrate and the circuit module, and the electrode layer includes a plurality of pads. The touch panel of claim 1, wherein the light shielding layer is disposed between the transparent substrate and the circuit module. The touch panel of claim 1, wherein the transparent substrate is disposed between the light shielding layer and the circuit module. The touch panel of claim 1, wherein the circuit module is located on a surface of the circuit module facing the light shielding layer. The touch panel of claim 4, wherein the alignment patterns are arranged along a first direction and have a first center point, and the alignment portions are arranged along the first direction and have a second a center point, wherein the first center point is perpendicular to the second center point The first direction is in one of the second directions. The touch panel of claim 5, wherein the circuit module is electrically connected to the electrode layer. The touch panel of claim 6, wherein the pads are arranged along the first direction, and the first direction is parallel to an inner side of the light shielding portion. The touch panel of claim 7, wherein each of the pads has a third center point, and the third center point and the second center point are aligned along the second direction. The touch panel of claim 1, wherein the shape of each of the alignment portions comprises a rectangle, a triangle, a circle or a wave. A touch display device includes: a display panel having a display area and a peripheral area surrounding the display area; and a touch panel disposed on one side of the display panel and corresponding to the display panel, the touch The control panel includes: a transparent substrate; a light shielding layer located in the peripheral region, and the light shielding layer has a light shielding portion and at least two alignment portions, wherein each of the alignment portions is connected to the light shielding portion and is displayed toward the display a circuit module disposed between the transparent substrate and the display panel, and the circuit The module has at least two alignment patterns; and an electrode layer disposed between the transparent substrate and the circuit module, and the electrode layer includes a plurality of pads. The touch display device of claim 10, further comprising a transparent adhesive disposed between the touch panel and the display panel for combining the touch panel with the display panel. A method for manufacturing a touch panel, comprising: providing a circuit module, wherein the circuit module has at least two alignment patterns; moving the circuit module to at least two image sensing devices, and using the images The sensing device is configured to position the circuit module, and the touch substrate includes a transparent substrate, a light shielding layer and an electrode layer, and the transparent substrate has a display area and a peripheral area surrounding the display area. The light shielding layer is located in the peripheral region, and has a light shielding portion and at least two alignment portions, and each of the alignment portions is connected to the light shielding portion and protrudes toward the display region, wherein the electrode layer includes a plurality of soldering portions And moving the touch substrate to the circuit module and the image sensing devices, and positioning the touch substrate by using the image sensing devices. The method of manufacturing the touch panel of claim 12, wherein the alignment pattern is located on a surface of the circuit module facing the image sensing device, and the step of positioning the circuit module comprises using each of the The image sensing device detects each of the alignment patterns to locate a first center point of the alignment patterns. The method of manufacturing the touch panel of claim 12, wherein the step of locating the alignment portions comprises detecting each of the alignment portions by using each of the image sensing devices to locate the alignment portions A second central point. The method of manufacturing the touch panel of claim 12, further comprising the step of positioning the alignment portions to solder the circuit module to the touch substrate.