TWI534665B - Touch panel - Google Patents

Description

Touch panel

The present invention relates to a touch panel, and more particularly to a touch panel having an improved back frame to improve the glue adhesive yield.

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 assembly process of the conventional touch panel module, the touch glass/cover lens and the sensor are firstly glued to complete the first water glue bonding procedure. Then, a second water glue bonding procedure is performed with the assembled panel module (including the panel unit and the backlight module).

In the water glue bonding process, because the bonding parameters such as the thickness and pressure of the rubber material are not easy to control, the overall yield is not high. In the first water-adhesive bonding procedure, since the touch glass/acrylic force of the touch panel end is similar to the hardness of the touch sensing unit (also known as glass), the first water-adhesive bonding procedure is usually Successful completion with a very good yield. However, before the second glue bonding process between the panel module and the touch panel end, the panel unit and the backlight module need to be combined first, and the masking tape is used around the panel unit and the backlight module. (bezel tape) or metal frame combination. Because the light and thin requirements must be met, the structural strength of the backlight module is generally poor (it is slightly flexible), so the panel unit has a similar glass material to the touch glass and the touch sensing unit, and the touch sensing unit and the panel unit are implemented. When the second water-adhesive bonding process is affected by the slightly elastic characteristics of the backlight module, the panel unit and the backlight module are easily deformed when the second water-repellent bonding in the vacuum environment is performed. In addition, the second water-adhesive bonding process may cause uneven pressure stress, uneven thickness of the rubber material, or problems such as bubbles and lack of glue, and reduce the yield of the second water-gel adhesive.

In order to solve the above problem, in the embodiment of the present invention, a touch panel includes a protection glass, a touch sensing unit, a panel unit, a backlight module, a back frame, and a fixing component. One side of the touch sensing unit is fixed to the protective glass by water-glue bonding to the protective glass. One side of the panel unit is glued to the other side of the touch sensing unit, and the protective glass, the touch sensing unit and the panel unit form a rigid panel member. The backlight module is disposed on the other side of the panel unit. The back frame has a slot-shaped body and a fixing portion. The slot-shaped body has a bottom surface and a plurality of sides extending perpendicularly to the four sides of the bottom surface. The backlight module is disposed in the slot-shaped body, and the side surface corresponds to the bottom surface. The other end extends to form the fixing portion, and the fixing portion and the bottom surface are parallel to a surface of the protection glass and the protection glass is crimped onto the fixing portion. The fixing element is disposed between the surface of the protective glass and the fixing portion to fix the protective glass and the back frame.

Through the structural change of the touch panel embodiment disclosed in the present invention, it is ensured that the two water glue bonding procedures between the protection unit of the rigid structure, the touch sensing unit and the panel unit can be smoothly performed with a fairly good yield. In order to avoid the influence of unevenness of the pressing stress, the uneven thickness of the rubber material, or the occurrence of bubbles and lack of glue, the water-adhesive bonding process is affected by the backlight module. The glass components of the backlight module and the water-repellent glue are combined by the back frame, and the back frame and the protection unit are glued together to simplify the assembly and rework procedures.

In the embodiment of the touch panel disclosed in the present invention, in the manufacturing process of the touch panel, the cover lens, the touch sensing unit (sensors), and the panel unit are firstly glued to form a glass. After the component (or the hard component), the back panel is combined with the glass component of the water-repellent bonding layer to complete the assembly of the touch panel, and the defect rate of the manufacturing process can be effectively reduced.

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a schematic exploded view of the components of the first embodiment of the touch panel 1 of the present invention (excluding the back frame of the touch panel 1 ), and FIG. 2 is a touch A schematic view of the back frame 70 of the first embodiment of the panel 1. The touch panel 1 includes a cover lens 10 , a touch sensing unit 30 , a panel 50 , a backlight module 60 , and a back frame 70 . In particular, the protection unit 10 herein is a protective glass, and in the following paragraphs, the protection unit 10 is still described. The protection unit 10, the touch sensing unit 30, and the panel unit 50 are preferably made of glass. In the combined procedure, the water glue 20 is adhered between the protection unit 10 and the touch sensing unit 30 to complete the first water glue bonding process. The entire surface of the touch sensing unit 30 is bonded to the protection unit 10 with the water glue 20 and the protection unit 10 is fixed to each other. Then, the water-glue 40 is adhered to the entire surface of the touch sensing unit 30 and the panel unit 50 to complete the second water-adhesive bonding process, so that the touch sensing unit 30 is also fixed to the panel unit 50. . The protective unit 10, the touch sensing unit 30, and the panel unit 50, which are bonded to each other with the water glue 20, 40, form a rigid panel member. In practice, the protection unit 10, the touch sensing unit 30, and the panel unit 50 are preferably rigid glass members. Therefore, when the water glues 20 and 40 are attached to each other, the water glue bonding process can be effectively improved. The yield is such as to avoid problems such as bubbles or lack of glue, and since the water gel bonding process does not involve the backlight module 60, the problem that the water gel penetrates into the backlight module 60 does not occur.

Then, the protection unit 10, the touch sensing unit 30, and the panel unit 50 are combined with the backlight module 60 by using the back frame 70. The back frame 70 is preferably an iron frame, but the material is not limited to the metal material. For example, in other embodiments of the present invention, the back frame 70 may also be a plastic frame. As shown in FIG. 2, the back frame 70 has a groove-like body 71 and fixing portions 77 and 78. The groove body 71 has a bottom surface 72 and a plurality of side surfaces 73, 74, 75, 76 extending perpendicularly to the four sides of the bottom surface 72. The bottom surface 72 is a planar structure extending in the xy plane for carrying the backlight module 60 while the side surface 73, 74, 75, and 76 extend perpendicularly from the four sides of the bottom surface 72 along the z-axis direction. The backlight module 60 is disposed in the groove body 71 of the back frame 70. The back frame 70 further has a plurality of fixing portions 77 and 78 which are horizontally oriented (x-axis direction or y-axis direction) from the other side faces 73, 74, 75, 76 of the groove-shaped body 71 at the other end of the opposite bottom surface 72. An outwardly extending planar structure, such that the fixed portions 77, 78 are substantially opposite the bottom surface 72 and one of the surfaces 11 of the protection unit 10 (Reference) Figure 3) Parallel to each other. In an embodiment of the present invention, the back frame 70 may have only a pair of fixing portions provided on opposite sides of the groove-shaped body 71: for example, only the fixing portion 78 provided on the side faces 73, 75, or only at the side surface 74 The fixing portion 77 on the 76 may be provided with fixing portions (i.e., fixing portions 77, 78) on the four side surfaces 73, 74, 75, and 76.

Please refer to FIG. 3 , which is a side cross-sectional view of the other components of the touch panel 1 of FIG. 1 and the back frame 70 of FIG. 2 along the line A-A after the combination is completed. As shown in FIG. 3 , the first side 21 of the touch sensing unit 20 and the protection unit 10 are adhered by the water glue 20 , and the second side 22 of the touch sensing unit 20 and the third side 51 of the panel unit 50 are The protective unit 10, the touch sensing unit 30, and the panel unit 50, which are bonded together with the water glue 20 and 40, are bonded to each other by the water glue 20, 40. It is fixed, and because of its similar material hardness, it can effectively control the flatness of the glue 20, 40 and improve the yield. In the backlight module 60 and the back frame 70, the backlight module 60 is disposed on the fourth side 52 of the panel unit 50, and includes a light guiding component 62 and a frame 64 and a light source (not shown), wherein the frame 64 The accommodating space provided by the grooved body 71 of the back frame 70 can be used to mount the backlight module 60 therein. In other words, the grooved body 71 of the back frame 70 covers the backlight module 60 to fix the backlight module 60.

Then, as shown in FIG. 3, the protection unit 10, the touch sensing unit 30, the panel unit 50, and the back frame 70 which are bonded to each other with the water glue 20, 40 are attached by a fixing member 80, wherein The protection unit 10 is crimped onto the fixing portions 77, 78, and the fixing member 80 is disposed between the protection unit 10 and the fixing portions 77, 78 to make the backlight module The group 60, the back frame 70, the protection unit 10, the touch sensing unit 30, and the panel unit 50 form the touch panel 1. In the embodiment of FIG. 3, the fixing component 80 is preferably a lip glue (but not limited thereto, as shown in the touch panel 2 of the second embodiment of FIG. 4, the fixing component 80 may also be a screw. The locking form is directly locked between the protection unit 10 and the fixing portion 78, and is attached between the surface 11 of the protection unit 10 and the fixing portion 78 of the back frame 70 (and between the fixing portions 77, Only the bonding with the fixing portion 78 is shown in the figure. Preferably, the fixing portions 77, 78 of the back frame 70 may have a width in the horizontal direction of more than 2 mm, and the optimum range may be 2 to 7 mm to facilitate coating. The cloth or the fixing member 80 is attached. After the fixing component 80 fixes the protection unit 10 and the back frame 70, the components of the touch panel 1 can be assembled, and it is particularly proposed that after the components of the embodiment of the present invention are attached to the related components, the panel unit The light-guiding element 62 disposed on the light-guiding element 62 of the backlight module 60 is disposed in the frame 64 at the same time, and no other fixing means is needed between the panel unit 50 and the backlight module 60 of the embodiment, or any fixed component is used. For example, the masking tape or the fixing frame, that is, the panel unit 50 and the backlight module 60 are not directly attached to each other, thereby saving the assembly process and cost. However, in other embodiments, an additional fixing means (such as an adhesive tape) may be adopted between the panel unit 50 and the backlight module 60 to enhance the firmness thereof.

In the embodiment of FIG. 3, the fixing portion 78 of the back frame 70 of the touch panel 1 may further have a reinforcing portion 79 extending in the vertical direction of the z-axis (ie, with the side surfaces 73, 74, 75, 76). In a substantially parallel manner, the fixing portion 78 (the fixing portion 77 is also the same) has a stronger structure. However, in other embodiments of the present invention, for example, in the third embodiment of the touch panel 3 shown in FIG. 5, the design of the reinforcing portion 79 may be omitted.

In the touch panel disclosed in the present invention, the protection unit, the touch sensing unit and the panel unit are firstly combined with each other by water glue to form a rigid panel member. After the backlight module is fixed by a back frame, the fixing portion of the back frame and the protection unit are attached or locked by a fixing component. In this way, the cost of the masking tape and the locking screw for fixing the backlight module and the panel unit can be saved, and the glue bonding procedure is performed on the glass component, which can effectively increase the yield of the water glue bonding and Avoid the problem of water gel infiltrating into the backlight module.

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.

1, 2, 3‧‧‧ touch panels

10‧‧‧Protection unit

20, 40‧‧‧ water gel

30‧‧‧Touch sensing unit

50‧‧‧ Panel unit

60‧‧‧Backlight module

62‧‧‧Light guiding elements

64‧‧‧Frame

70‧‧‧ Back frame

71‧‧‧ trough body

72‧‧‧ bottom

73, 74, 75, 76‧‧‧ side

77, 78‧‧‧ Fixed Department

79‧‧‧ Strengthening Department

80‧‧‧Fixed components

FIG. 1 is a schematic view of a first embodiment of a touch panel of the present invention.

Figure 2 is a schematic view of the back frame of the touch panel.

3 is a side cross-sectional view showing the first embodiment of the touch panel.

4 is a side cross-sectional view showing a second embodiment of the touch panel.

Figure 5 is a side cross-sectional view showing a third embodiment of the touch panel.

1. . . Touch panel

10. . . Protection unit

20, 40. . . water glue

30. . . Touch sensing unit

50. . . Panel unit

60. . . Backlight module

62. . . Light guiding element

64. . . frame

70. . . Back frame

72. . . Bottom

73, 75. . . side

78. . . Fixed part

79. . . Strengthening department

80. . . Mouth glue

Claims (9)

A touch panel includes: a cover glass; a touch sensing unit, wherein a side surface of the touch sensing unit is fixed to the protective glass by water glue and fixed to the protective glass; One side of the panel unit and the other side of the touch sensing unit are glued together, and the protective glass, the touch sensing unit and the panel unit form a rigid panel member; a backlight module is disposed on the panel The other side of the unit; a back frame having a slot-shaped body and a fixing portion, the slot-shaped body having a bottom surface and a plurality of sides extending perpendicularly to the four sides of the bottom surface, the backlight module being disposed in the slot a fixing portion is formed on the other end of the bottom surface corresponding to the bottom surface, the fixing portion and the bottom surface are parallel to a surface of the protective glass, and the protective glass is crimped to the fixing portion; and a fixing member is The surface of the protective glass and the fixing portion are disposed to fix the protective glass and the back frame. The touch panel of claim 1, wherein the protective glass, the touch sensing unit, and the panel unit are made of glass. The touch panel of claim 1, wherein the panel unit and the backlight module are not attached to each other. The touch panel of claim 1, wherein the fixing component is a mouth glue or a screw. The touch panel of claim 1, wherein the fixing portion extends on opposite sides of the groove-shaped body. The touch panel of claim 1, wherein the fixing portion extends on four sides of the groove-shaped body. The touch panel of claim 1, wherein the fixing portion further has a reinforcing portion parallel to the plurality of sides. The touch panel of claim 1, wherein the fixing portion extends on the side surface and the portion parallel to the surface of the protective glass has a width of 2 to 7 mm. The touch panel of claim 1 , wherein the backlight module comprises a light guiding component and a frame disposed on the light guiding component and disposed in the frame.