TWI475465B - Display module having electromagnetic touch module - Google Patents

Description

Display module with electromagnetic touch module

The present invention relates to a display module; in particular, the present invention relates to a display module having an electromagnetic touch module.

Display devices, such as liquid crystal displays and other electronic products, have been widely used in life. With the demand for products such as display devices and the increasing competition among manufacturers in the market, manufacturers of display products are gradually introducing thinner or thinner display products with electromagnetic touch functions, and It has become a key factor in the competitiveness of related products.

FIG. 1A is a conventional display device having an electromagnetic touch function. FIG. 1B is a schematic cross-sectional view showing the assembled device of FIG. 1A. FIG. As shown in FIGS. 1A and 1B , the display device 10 includes a backlight module 20 , an electromagnetic touch module 30 , a support frame 40 , and an outer frame 50 . The electromagnetic touch quality is easily affected by the blocking or interference of the electromagnetic wave signal. In order to prevent the electromagnetic signal of the electromagnetic touch module 30 from being blocked or interfered, the flat electromagnetic touch module 30 is usually designed to be made of iron. Within the outer frame 50, as shown in FIG. 1A, to avoid electromagnetic interference from being disturbed by the outer frame 50. However, since the electromagnetic touch module 30 has a certain thickness, in the case where the electromagnetic touch module 30 is disposed on the inner surface of the outer frame 50, the outer frame 50 is required to support the electromagnetic touch module 30. The push-out is performed to form a sandwich space to accommodate the electromagnetic touch module 30, thereby increasing the thickness of the overall module. Therefore, it is necessary to further reduce the thickness of the display device 10 to meet the market demand for thinning of the display device.

Another object of the present invention is to provide a display device that can reduce the thickness required for a display device having an electromagnetic touch module.

The invention provides a display module, which comprises a backlight module and an electromagnetic touch module. The group of the backlight includes an inner frame and an outer frame; the outer frame at least partially surrounds the outer side of the inner frame, and together with the inner frame, encloses an accommodating area. The electromagnetic touch module is disposed in a sheet shape below the backlight module opposite to the backlight generating direction and supports the bottom of the accommodating area. In addition, the electromagnetic touch module has an inner surface, and the edge of the inner surface is connected to the bottom of the inner frame. The projection range of the outer frame on the plane of the parallel inner surface is located outside the edge of the projection range of the electromagnetic touch module on the same plane. With the above design, the overall thickness of the display module with the electromagnetic touch module can be effectively reduced, and a certain structural stability is still maintained.

L‧‧‧Light source side

S‧‧‧ accommodating area

10‧‧‧ display device

20‧‧‧Backlight module

30‧‧‧Electromagnetic touch module

40‧‧‧Support frame

50‧‧‧Front frame

60‧‧‧Digital conversion unit

100‧‧‧ display module

120‧‧‧ inside frame

122‧‧‧ bottom

124‧‧‧ Groove

126‧‧‧ openings

130‧‧‧Front frame

131‧‧‧ Sidewall

132‧‧‧ toe

133‧‧‧Clock Department

134e‧‧‧End

140‧‧‧Electromagnetic touch module

142‧‧‧ inner surface

142e‧‧‧ edge

150‧‧‧First layer

152‧‧‧Second layer

160‧‧‧Optical plate components

165‧‧‧Light source module

170‧‧‧Light source holder

172‧‧‧floor

180‧‧‧ boards

1A and 1B are schematic views of a conventional electromagnetic touch display device; FIG. 2A is a schematic view showing the explosion of the display module of the present invention; FIG. 2B and FIG. 2C are schematic views of the module of FIG. 2A; FIG. 3B is a schematic view of another embodiment of FIG. 3A; FIG. 3C is a schematic view of another embodiment of FIG. 3A; FIG. 3D is a schematic view of another embodiment of FIG. 3C; 3A is a schematic view of another embodiment of FIG. 3A; FIG. 4A is a schematic view of an embodiment of the outer frame having a latching portion; FIG. 4B is a schematic view of another embodiment of FIG. 4A; 5B is a schematic view of another embodiment of FIG. 5A; FIG. 6A is a schematic cross-sectional view of FIG. 2B cut by VV; and FIGS. 6B-6D are schematic views of an embodiment of the outer frame of the light source side.

The invention provides a display module, which can reduce the function of setting electromagnetic touch Can increase the thickness. In a preferred embodiment, the display module can include a display module having an electromagnetic touch function, such as a tablet computer, a smart handheld computer, or a mobile phone. In addition, the display module is preferably a liquid crystal display module, but may also be an organic light emitting diode display module, an electrophoretic display module or other forms of liquid crystal display module.

2A is a schematic exploded view of an embodiment of a display module 100 of the present invention. As shown in FIG. 2A , the display module 100 includes a display panel 101 , a frame group and an electromagnetic touch module 140 . The frame set includes an inner frame 120 and an outer frame 130. In this embodiment, the outer frame 130 at least partially surrounds the outer side of the inner frame 120, and together with the inner frame 120, encloses an accommodating area S, as shown in FIG. 2B. In a preferred embodiment, the display module 100 is used in electronic products such as smart phones and tablet computers. In the present embodiment, the inner frame 120 is preferably formed of a glue material, and the outer frame 130 is preferably made of a metal material. The outer frame 130 made of a metal material can provide structural rigidity of the display module 100. However, in other different embodiments, the outer frame 130 may also be formed of other different materials, such as plastics.

2C is a display module 100 of the composition of FIG. 2A. As shown in FIGS. 2A and 2C, the display panel 101 is supported and fixed by the inner frame 120. The electromagnetic touch module 140 has an inner surface 142 facing the display panel 101, wherein the edge 142e of the inner surface 142 is connected to the bottom portion 122 of the inner frame 120. In this embodiment, the electromagnetic touch module 140 is formed in a sheet shape, and is disposed under the backlight module 110 opposite to the backlight generating direction to support the bottom of the accommodating area S. In addition, the projection range of the outer frame 130 on the plane of the parallel inner surface 142 is outside the edge of the projection range of the electromagnetic touch module 140 on the same plane, or at least the range of the electromagnetic touch module 140 corresponding to the visible area of the display panel. In addition, to reduce the chance of interference.

Specifically, in this embodiment, the display module 100 uses the backlight module 110 to generate a backlight. The backlight module 110 can include an optical plate component 160 such as a light guide plate and a light source module 165. The optical plate component 160 is disposed in the accommodating space S. In this embodiment, the accommodating space S of the display module 100 has a light source side L, and the inner frame 120 forms an opening 126 on the light source side L. In addition, the display module 100 can further include a circuit board 180. In this embodiment, the circuit board 180 can be connected to the display panel 101 to provide the input signal of the display panel 101. However, in different embodiments, the circuit board 180 can also be connected to the electromagnetic touch module 140 for signal transmission and processing. .

3A is a schematic cross-sectional view of FIG. 2B in the H-H direction. As shown in FIG. 2B and FIG. 3A, the outer frame 130 includes a side wall portion 131 and a toe portion 132, wherein the side wall portion 131 surrounds the outer side of the inner frame 120, and the toe portion 132 is bent and extends into the inner frame with respect to the side wall portion 131. The bottom portion 122 of the 120 is opposite to the end edge of the electromagnetic touch module 140. As shown in FIG. 3A, the free end of the toe portion 132 is opposite to the front end of the electromagnetic touch module 140; and the smaller the end edge area is to be fully projected on the surface of the larger end edge area. However, in different embodiments, the projection range of the free end surface range of the toe portion 132 and the end edge surface of the electromagnetic touch module 140 may only partially overlap. In this embodiment, the edge 142e of the electromagnetic touch module 140 is connected to the bottom portion 122 of the inner frame 120 by a first adhesive layer 150. As shown in FIG. 3A , the first adhesive layer 150 extends between the toe portion 132 of the outer frame 130 and the end edge of the electromagnetic touch module 140 , and connects the toe portion 132 and the end edge of the electromagnetic touch module 140 . Specifically, the edge of the electromagnetic touch module 140 is symmetrical with the edge of the toe 132 of the outer frame 130, and the electromagnetic touch module 140 is only used by the first adhesive layer 150 and the inner frame 120. The outer frame 130 is connected. As shown in FIG. 3A, one side of the toe portion 132 facing away from the inner frame 120 is preferably aligned in parallel with one of the faces of the electromagnetic touch module 140 facing away from the inner surface 142. This has the advantage that the outer shape of the structure of the display module 100 can be more suitable for being modularized, and the assembly process can be performed quickly and accurately when the display module 100 is assembled in various electronic products.

FIG. 3B is a schematic view of another embodiment of FIG. 3A. As shown in FIG. 3B, the bottom portion 122 of the inner frame 120 can also form a recess relative to the edge of the electromagnetic touch module 140. At least a portion of the first adhesive layer 150 can be disposed in the recess by the recess. The advantage is that the first adhesive layer 150 can be accurately positioned between the recess of the inner frame 120, the outer frame 130 and the electromagnetic touch module 140 during the assembly of the display module 100. In addition, in this embodiment, when the thickness of the electromagnetic touch module 140 is thicker than the toe portion 132, the groove may be disposed to maintain the back surface of the electromagnetic touch module 140 and the bottom surface of the toe portion 132. Reduce the drop.

In the embodiment shown in FIG. 3C, the first adhesive layer 150 between the electromagnetic touch module 140, the inner frame 120 and the outer frame 130 will be formed into an "L"-shaped cross section to cause electromagnetic touch. The module 140 avoids direct contact with the outer frame 130 made of iron. In this case, the first adhesive layer 150 having an L-shaped cross-section can simultaneously attach the electromagnetic touch module 140 to the inner frame 120 and the outer frame 130, thereby increasing structural stability. In addition, by extending the first adhesive layer 150 between the bottom surface of the inner frame 120 and the electromagnetic touch module 140, the back of the electromagnetic touch module 140 can be maintained when the thickness thereof is thin. Flatness with the bottom surface of the toe portion 132.

FIG. 3D is a schematic view of another embodiment of FIG. 3A. As shown in FIG. 3D, in the embodiment, the bottom portion 122 of the inner frame 120 may also be formed with a recess 124 from the outer side, and the toe portion 132 of the outer frame 130 is bent and protruded into the inner side of the side wall portion 131. Below the bottom 122 of the frame 120 is at least partially received within the recess 124 of the inner frame 120. In this way, the outer frame 130 can be more tightly fixed on the outer side of the inner frame 120. In addition, the outer frame 130 and the inner frame 120 can be assembled more quickly and accurately during assembly, which can reduce the time required for assembly work. In this embodiment, as shown in FIG. 3D, the thickness a of the toe portion 132 of the outer frame 130 is preferably the same as the thickness b of the groove 124; but is not limited thereto, the thickness a of the toe portion 132 may also be smaller than the groove. The thickness b of 124. In this embodiment, the edge of the inner surface 142 of the electromagnetic touch module 140 is attached to the bottom portion 122 of the inner frame 120 by the first adhesive layer 150. In other words, the first adhesive layer 150 is located between the inner surface 142 of the edge of the electromagnetic touch module 140 and the bottom 122 of the inner frame 120. It should be noted that in the embodiment, the first adhesive layer 150 and the electromagnetic touch module 140 do not extend below the outer frame 130. However, in other different embodiments, as shown in FIG. 3E , the first adhesive layer 150 and the electromagnetic touch module 140 may also extend below the outer frame 130 .

Figure 3F is another embodiment of the present invention. As shown in FIG. 3F, when the thickness a of the toe portion 132 of the outer frame 130 is greater than the thickness b of the recess 124 of the inner frame 120, the toe portion 132 will partially protrude beyond the groove 124 and its end portion 134e will Opposite the edge of the electromagnetic touch module 140. In this embodiment, the first adhesive layer 150 between the electromagnetic touch module 140, the inner frame 120 and the outer frame 130 is formed to have an L-shaped cross section, so that the electromagnetic touch module 140 can be Avoid direct contact with the iron frame 130. In this case, the first adhesive layer 150 having an "L"-shaped cross-section can simultaneously attach the electromagnetic touch module 140 to the inner frame 120 and the outer frame 130, and is supplemented by the fitting of the toe portion 132 and the recess 124. Relationship can effectively increase the stability of the structure and the strength of the connection. In addition, by extending the first adhesive layer 150 between the bottom surface of the inner frame 120 and the electromagnetic touch module 140, the flatness of the back surface and the bottom surface of the toe portion 132 can be maintained when the thickness of the electromagnetic touch module 140 is thin. .

4A is a schematic view of another embodiment. As shown in FIG. 4A, the recess 124 can be formed at a position at the bottom 122 of the inner frame 120 adjacent to the end edge of the electromagnetic touch module 140. In the present embodiment, the end edge of the toe portion 132 of the outer frame 130 forms an engaging portion 133. The engaging portion 133 is an upward reflexed parallel to the side wall portion 131 of the outer frame 130. When the toe portion 132 extends into the bottom 122 of the inner frame 120 When the bottom portion is engaged, the engaging portion 133 will extend into the recess 124, so that the outer frame 130 can be firmly engaged and attached to the outer side and the bottom portion 122 of the inner frame 120. As shown in FIG. 4A , at least a portion of the first adhesive layer 150 is disposed in the recess 124 between the electromagnetic touch module 140 and the toe portion 132 of the outer frame 130 .

4B is a schematic view of another embodiment of FIG. 4A. As shown in FIG. 4B , the end edge of the electromagnetic touch module 140 can also extend to the end edge of the toe portion 132 of the outer frame 130 , and is attached to the inner frame 120 by the first adhesive layer 150 attached to the inner surface 142 . on.

FIG. 5A is a schematic view of another embodiment. As shown in FIG. 5A, the outer frame 130 may have only side walls and no toes. In this embodiment, the outer frame 130 still surrounds at least the outer side of the inner frame 120, but the inner surface 142 of the electromagnetic touch module 140 extends below the side wall portion 131 of the outer frame 130, and supports the side wall portion 131. . The first adhesive layer 150 extends between the inner surface 142 of the electromagnetic touch module 140 and the bottom end of the outer frame 130, and between the inner surface 142 and the bottom portion 122. In the embodiment of FIG. 5B, the bottom end of the outer frame 130 can be longer than the bottom portion 122 of the inner frame 120. In this case, the first adhesive layer 150 having an L-shaped cross section can be used to move the electromagnetic touch module 140. At the same time, it is attached to the bottom surface 122 of the inner frame 120 and the inner surface of the outer frame 130 to increase the stability of the structure.

Figure 6A is a schematic cross-sectional view of Figure 2B in the V-V direction. As shown in FIG. 6A, the display module 100 is provided with a light source module 165 adjacent to the opening 126 of the light source side L. The light source module 165 is a backlight required for generating the display module 100. In this embodiment, the light source module 165 is a light emitting diode (LED); however, the light source module 165 may be other light sources in other different embodiments. In the embodiment, the optical plate element 160 is a light guide plate for refracting the backlight generated by the light source module 165 upward. One end surface of the optical plate element 160 faces the light emitting surface of the light source module 165 to receive the light generated by the light source module 165.

As shown in FIG. 6A, the outer frame 130 forms a light source holder 170 extending in the opening 126 on the light source side L. As shown in FIG. 6A, the light source holder 170 has a bottom plate 172 parallel to the electromagnetic touch module 140, and the end of the bottom plate 172 is opposite to the end edge of the electromagnetic touch module 140, and the relative relationship is similar to the toe portion. The opposite edge of the electromagnetic touch module 140. Specifically, in the present embodiment, the light source holder 170 is used to surround the cover light source module 165, and can clamp or at least partially accommodate one end of the optical plate member 160. As shown in FIG. 6A, the bottom surface of one end of the optical plate member 160 disposed in the accommodating space S is supported by the bottom plate 172 of the light source holder 170, and the inner surface 142 of the electromagnetic touch module 140 is also attached to the optical plate element. The bottom surface of the member 160 is preferably located in the same Horizontal surface.

As described above, the display module 100 can include a circuit board 180 for controlling the signal input of the display panel 101, or can also be used to control the electromagnetic touch module 140. As shown in FIG. 6A , the circuit board 180 is disposed under the bottom plate 172 , and one end of the circuit board 180 extends to the back side edge of the electromagnetic touch module 140 . In other words, the circuit board 180 is simultaneously connected to the bottom surface of the bottom plate 172 and the back side edge of the electromagnetic touch module 140. In this embodiment, the circuit board 180 is preferably attached to the bottom surface of the electromagnetic touch module 140 by a second adhesive layer 152. As shown in FIG. 6 , the second adhesive layer 152 is disposed at least partially between the circuit board 180 and the bottom surface of the bottom plate 172 , and is partially disposed between the circuit board 180 and the back side edge of the electromagnetic touch module 140 . In this embodiment, when the bottom surface of the electromagnetic touch module 140 is convex or the thickness of the electromagnetic touch module 140 is thicker than the bottom surface of the bottom plate 172, the second adhesive layer 152 is located between the bottom surface of the circuit board 180 and the bottom plate 172. The thickness of the portion is preferably greater than the portion between the circuit board 180 and the back side edge of the electromagnetic touch module 140; but is not limited thereto, in other different embodiments, the second glue layer 152 is located on the circuit board 180 and the bottom plate 172. A portion of the thickness between the bottom surfaces may also be less than or equal to a portion between the circuit board 180 and the back side edge of the electromagnetic touch module 140. With this design, the circuit board 180 can be more stably connected to other components.

FIG. 6B is a schematic view of another embodiment of the outer frame 130 in the light source side L of FIG. 6A. As shown in FIG. 6B, the light source holder 170 is integrally formed with the outer frame 130. In the embodiment, the bottom plate 172 of the light source holder 170 preferably does not extend into the accommodating area S surrounded by the side wall portion 131 of the outer frame 130. In this way, the effect of heat dissipation from the light source can be improved. However, as shown in FIG. 6C, the bottom plate 172 may also extend into the accommodating region S so as to enhance the function of supporting the optical plate member 160 and help to block the backlight refracted downward. In addition, as shown in FIG. 6C, the sidewalls of the outer frame 130 can also shield both ends of the light source holder 170.

The present invention has been described by the above-described related embodiments, but the above embodiments are only intended to implement the scope of the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equivalent arrangements of the spirit and scope of the invention are included in the scope of the invention.

S‧‧‧ accommodating area

110‧‧‧Backlight module

120‧‧‧ inside frame

122‧‧‧ bottom

130‧‧‧Front frame

131‧‧‧ Sidewall

132‧‧‧ toe

140‧‧‧Electromagnetic touch module

142‧‧‧ inner surface

142e‧‧‧ edge

150‧‧‧First layer

Claims (12)

A display module includes: a frame group including: an inner frame; and an outer frame at least partially surrounding the outer side of the inner frame and surrounding the inner frame to form an accommodating area; and an electromagnetic touch mode The electromagnetic touch module has an inner surface, and the edge of the inner surface is connected to the bottom of the inner frame; the inner touch surface is disposed on the back side of the frame group; The projection range of the outer frame on the plane parallel to the inner surface is located outside the edge of the projection range of the electromagnetic touch module on the same plane. The display module of claim 1, wherein the outer frame comprises a side wall portion and a toe portion, the side wall portion surrounding the outer side of the inner frame, the toe portion being bent and extending into the inner frame relative to the side wall portion The bottom of the bottom is opposite to the edge of the electromagnetic touch module. The display module of claim 2, further comprising a first adhesive layer connecting the edge of the inner surface to the bottom of the inner frame; wherein the first adhesive layer extends to the toe and the electromagnetic touch mode The edge of the group is connected to the toe and the edge of the electromagnetic touch module. The display module of claim 1, wherein the bottom of the inner frame is formed with a recess from the outer side, the outer frame comprising a side wall portion and a toe portion, the side wall portion surrounding the outer side of the inner frame The toe portion is bent relative to the side wall portion and extends below the bottom of the inner frame to be at least partially received in the recess. The display module of claim 4, wherein the thickness of the toe is greater than the thickness of the groove, and the end of the toe protruding from the outside of the groove is opposite to the edge of the electromagnetic touch module. . The display module of claim 4, wherein the inner surface extends below the toe and supports the toe. The display module of claim 1, wherein the outer frame comprises a side wall portion surrounding an outer side of the inner frame, the inner surface extending below the wall portion and supporting the side wall portion. The display module of claim 1, further comprising a backlight module, wherein the backlight module comprises an optical plate-like component disposed in the accommodating space, the inner surface being attached to the bottom surface of the optical plate component . The display module of claim 1, wherein the accommodating space has a light source side, and the inner frame forms an opening on the light source side, and the outer frame forms a light source holder extending in the opening on the light source side; The light source holder has a bottom plate parallel to the electromagnetic touch module, and an end of the bottom plate is opposite to an end edge of the electromagnetic touch module. The display module of claim 9, further comprising a backlight module, wherein the backlight module comprises an optical plate-like component disposed in the accommodating space, and one end of the optical plate component is supported by the bottom plate The inner surface is attached to the bottom surface of the optical plate member. The display module of claim 9, further comprising a circuit board disposed under the bottom plate, one end of the circuit board extending to a back side edge of the electromagnetic touch module; wherein the circuit board is simultaneously connected to the bottom plate The bottom surface and the back side edge of the electromagnetic touch module. The display module of claim 11, further comprising a second adhesive layer disposed between the circuit board and the bottom surface of the bottom plate, and partially disposed on the circuit board and the electromagnetic touch mode The thickness of the second adhesive layer between the circuit board and the bottom surface of the bottom plate is greater than the portion between the circuit board and the back side edge of the electromagnetic touch module.