TW201818206A - Touch display device - Google Patents

Abstract

A touch display device includes a protective cover, a panel module, a support abutment, a bottom cover, a deformable buffer member, and a deformable conductive layer. The panel module is under the protective cover and includes a first electrode. The support abutment is around the panel module, the upper portion of the support abutment is assembled with the protective cover, and the bottom cover is movably assembled to the lower portion of the support abutment. The deformable buffer member is located between the panel module and the bottom cover. The deformable conductive layer is on a surface of the deformable buffer member away from the panel module.

Description

Touch display

The present invention relates to touch technology, and in particular, to a touch display.

With the recent development of capacitive touch technology, operation has become more intuitive and convenient, and is widely welcomed by today's consumers, which in turn has made touch panels a mainstream display product for today's portable 3C products. With the development of touch technology and the need for control. At present, display products corresponding to the pressing pressure and pressing time and generating feedback are generally referred to as 3D touch.

Generally speaking, the sensing of the three-dimensional touch in the z direction mainly corresponds to the deformation of the panel. Nowadays, it is accomplished by using a force sensor. However, the general panel is only supported by its bracket at its periphery. With the influence of gravity and the force of pressing, it is easy to cause the panel to sag in the middle and have an arc shape, which may cause the wrong judgment of the signal or the pressing operation is not obvious, making z The effect in the direction is invalid.

Further, in the process of pressing and transporting, the casing fixing the panel and the bracket may be deformed or loosened, and its deformation is difficult to recover. This may also cause the wrong judgment of the signal, or the pressing operation is not obvious, which makes the z direction. The touch effect on the camera does not work.

In order to solve the problems facing conventional technologies, a touch display is provided here.

In one embodiment, the touch display includes a protective cover, a panel module, a side wall bracket, a bottom cover, a deformable buffer, and a deformable conductive layer. The panel module is located under the protective cover, and the panel module includes a first electrode. The side wall bracket is located around the panel module, and the upper end of the side wall bracket is connected with a protective cover. The bottom cover is movably connected to the lower end of the side wall bracket. The deformable buffer is located between the panel module and the bottom cover. The deformable conductive layer is located on a surface of the deformable buffer member facing away from the panel module.

In the above embodiments, the panel module is mainly supported and cushioned by a deformable cushioning member, reducing the deformation of the central portion of the panel module relative to the surrounding portion, and providing the elasticity of recovery. In addition, The characteristics of the deformable conductive layer on the surface of the buffer member can be changed according to the deformation and deformation of the panel module and the deformable buffer member, thereby substantially dynamically maintaining the distance between the first electrode and the deformable conductive layer to avoid being caused by deformation. The change of the distance further changes the capacitance value and the estimated pressing force.

Referring to FIG. 1, FIG. 1 is a schematic cross-sectional view of a first embodiment of a touch display. As shown in FIG. 1, the touch display 100 includes a protective cover 10, a side wall bracket 20, a panel module 30, a deformable buffer 40, a deformable conductive layer 50, and a bottom cover 60. The panel module 30 is located under the protective cover 10. For example, at least part of the protective cover 10 can allow the light of the panel module 30 to pass out, and can be used to protect the panel module 30 from being damaged. In some embodiments, the protective cover 10 may be glass, acrylic, or other suitable materials. The side wall bracket 20 is located at the periphery of the panel module 30, and an upper end of the side wall bracket 20 is connected with a protective cover 10 to protect the panel module 30. In FIG. 1, the side wall bracket 20 may be located at the periphery of the protective cover 10 and extend toward the bottom cover 60, but is not limited thereto, and may be modified according to requirements. For example, the side wall bracket 20 may be located on the bottom surface of the protection cover 10 and toward the bottom cover 60 Stretch. The bottom cover 60 is movably assembled to the lower end of the side wall bracket 20. Here, the side wall bracket 20, the protective cover 10, and the bottom cover 60 can surround an accommodating space, and the panel module 30, the deformable buffer 40, and the deformable conductive layer 50 can be accommodated in the accommodating space. in. It should be noted that the way of assembling is, for example, snapping, locking, attaching, or any suitable method for assembling.

In some embodiments, the side wall bracket 20 may include a frame 21 and a side wall 23. The upper end of the side wall bracket 20 may be a frame 21, and the frame 21 surrounds and connects the protective cover 10. The side wall 23 extends from the frame 21 toward the bottom cover 60.

The panel module 30 is provided with a first electrode 31. For example, the first electrode 31 can receive a fixed voltage, and the deformable conductive layer 50 receives a reference voltage, so that the first electrode 31 and the deformable conductive layer 50 There is a certain voltage difference between them. In some embodiments, the first electrode 31 may be a common electrode of the touch display 100 or a sensing electrode. The first electrode 31 may be a transparent conductive material, such as indium tin oxide (ITO), Or aluminum zinc oxide (Zinc Aluminum Oxide, AZO), which is only an example here, but not limited thereto. In addition, the deformable conductive layer 50 may be a ground layer.

The deformable buffer 40 is located between the panel module 30 and the bottom cover 60. The deformable cushioning member 40 has the characteristics of being deformable with pressing, and has good resilience. Therefore, when the touch display 100 is pressed, the deformable cushioning member 40 can be deformed with the downward pressure, and can recover from the deformed state when the downward pressure disappears (that is, the pressing is eliminated). In other words, the deformable cushioning member 40 can effectively disperse the gravity of the panel module 30 itself and the pressing pressure channel from the protective cover 10 using the fluid material 43 to disperse and provide the surface support of the panel module 30 to maintain the panel module 30 to avoid excessive permanent deformation of the panel module 30. In some embodiments, the deformable buffer 40 includes, for example, a sealed bag body 41 and a fluid material 43. The fluid material 43 is filled in the sealed bag body 41. The fluid material 43 may be a gas or a liquid. In some embodiments, the deformable buffer 40 can be implemented by using an air bag or a liquid bag with stable material properties. In addition, filling the sealed bag body 41 with a liquid such as oil, silicone, or latex is more difficult to compress than a gas, and helps to provide a good restoring force. The above is merely an example, but it is not limited thereto.

The deformable conductive layer 50 is located on the surface of the deformable cushioning member 40 facing away from the panel module 30, and has the characteristic of being deformable or recoverable with the deformable cushioning member 40. In some embodiments, the deformable conductive layer 50 is made of a conductive material. Furthermore, for example, the deformable conductive layer 50 is made of copper, titanium, aluminum, an alloy material, or a transparent conductive material. In some embodiments, the deformable conductive layer 50 may be a mesh structure such as a copper mesh to provide better deformation tolerance and resilience. The mesh structure is coated on the deformable buffer along the surface of the deformable buffer 40. The component 40 faces away from the surface of the panel module 30. It should be noted that compared with the conductive film layer covered on the entire surface, the mesh structure is less likely to have an irreversible deformation effect after being distorted.

The bottom cover 60 is movably assembled to the lower end of the side wall bracket 20, and can be moved dynamically when pressed or eliminated, but does not detach from the side wall bracket 20.

Referring to FIG. 2, FIG. 2 is a schematic cross-sectional view of a first embodiment of a touch display in a pressed state. As shown in FIG. 2, when the touch display 100 is pressed by, for example, a finger or a stylus pen, the protective cover 10 and the panel module 30 are deformed by being pressed. Here, for convenience of reading, FIG. 1 is omitted. The deformation caused by the gravity of the panel module 30 itself is not drawn in actual scale in FIG. 2, and the scale of the deformation caused by the pressing force is enlarged, so that the shape change before and after the pressing force is emphasized in FIGS. 1 and 2. Describe here.

After the protective cover 10 and the panel module 30 are deformed under pressure, the deformable cushioning member 40 and the deformable conductive layer 50 can dynamically and correspondingly deform. Because the periphery of the panel module 30 is supported by the side wall bracket 20, when the touch display 100 is pressed, the deformation amount generated around the panel module 30 is small, and the deformation amount generated in the middle portion of the panel module 30 is large. . Conversely, when the conductive layer is non-deformable, that is, the approximate shape of the conductive layer is fixed and cannot correspond to the deformation of the protective cover 10 and the panel module 30, there will be a problem that the capacitance change in the middle is large and the edge capacitance value is small. Furthermore, when the capacitance of the touch display 100 is changed unevenly when pressed, the required pressing force at different touch positions will be different, which will affect the different force conditions for generating feedback. here. By using the deformable and recoverable functions of the deformable cushioning member 40 and the deformable conductive layer 50, the shape can be correspondingly changed, so that the deformation between the deformable conductive layer 50 and the first electrode 31 is close, so that The sensed capacitance value is uniform to avoid different force conditions for feedback when pressing at different places.

Since the panel module 30 is affected by its own gravity, in reality, there will also be a phenomenon that the deformation amount generated around the panel module 30 is small, and the deformation amount generated in the middle part of the panel module 30 is large. In some embodiments, in the design of the bottom cover 60, the bottom cover 60 may include an edge portion 61 and a central portion 63, and the central portion 63 is surrounded by the edge portion 61. The distance between the central portion 63 and the protective cover 10 is greater than the distance between the edge portion 61 and the protective cover 10. Thereby, the shape of the bottom cover 60 can be prevented from restricting the deformation of the deformable cushioning member 40 and the deformable conductive layer 50, and the deformation of the deformable conductive layer 50 and the first electrode 31 is not uniform.

In addition, as shown in FIGS. 1 and 2, the edge portion 61 of the bottom cover 60 has a stepped structure from the outside to the central portion 63, that is, the bottom cover 60 gradually changes in a stepwise manner, and the cover 10 is gradually adjusted and protected. The interval between the two corresponds to the deformation of the deformable cushioning member 40 and the deformable conductive layer 50 when pressed.

Further, when the touch display 100 is pressed, the side wall bracket 20 will be displaced downward due to the force, and the bottom cover 60 will move upward relative to the side wall bracket 20 dynamically. Here, for example, the side wall bracket 20 and the bottom cover 60 may be connected by a piston tongue and groove type. For another example, the sidewall 23 of the sidewall bracket 20 extends to the bottom cover 60, and the sidewall bracket 20 further includes a stop portion 231. The stopping portion 231 may extend from the side wall 23 of the side wall bracket 20, for example. When projected in a direction perpendicular to the stopper portion 231, the stopper portion 231 overlaps at least part of the edge portion 61 of the bottom cover 60, and the edge portion 61 of the bottom cover 60 is at least partially located on the deformable buffer 40 and the stopper portion 231 between. In other words, the edge portion 61 of the bottom cover 60 can be blocked by the stopper portion 231 without detaching from the side wall bracket 20. Therefore, the bottom cover 60 can be dynamically adjusted in position as it is pressed, providing mobility and cushioning effects during deformation, and avoiding the bottom cover 60 from being deformed during transportation to cause the bottom cover 60 to be separated from the side wall bracket 20. Furthermore, the movable connection of the bottom cover 60 and the side wall bracket 20 can further provide convenience for replacement and maintenance.

Referring to FIG. 3, FIG. 3 is a schematic cross-sectional view of a second embodiment of a touch display. As shown in FIG. 3, the connection relationship between the bottom cover 60 and the side wall bracket 20 in FIG. 3 is different from those in FIGS. 1 and 2. In the second embodiment, at least two sliding grooves may be provided on the side wall 23 of the side wall bracket 20. 25. An edge portion 61 of the bottom cover 60 is connected to the chute 25. Thereby, when the bottom cover 60 is pressed, the edge portion 61 slides along the slide groove 25, and the sliding of the edge portion 61 is restricted in the slide groove 25.

By assembling the bottom cover 60 of the first embodiment and the second embodiment, in addition to making the deformation uniform, compared with the traditional method of integrally forming the bottom cover and the side wall bracket or fixing the two with glue, The above-mentioned embodiment can provide dynamic adjustment when a force is applied, and can prevent the bottom cover 60 from deforming or falling off when the side wall bracket 20 is squeezed or collided, thereby causing variation in the force conditions for feedback by pressing and touching. The foregoing embodiments are merely examples, but are not intended to be limiting. Other assembly methods capable of movably connecting the bottom cover 60 and the side wall bracket 20 are within the scope of the present invention.

Referring to FIG. 4, FIG. 4 is a schematic cross-sectional view of a third embodiment of a touch display. As shown in FIG. 4, the third embodiment of the touch display differs from the aforementioned first and second embodiments in that the edge portion 61 of the bottom cover 60 has an arcuate structure from the outside to the central portion 63. Here, the arc-shaped structure of the bottom cover 60 can respond to the deformation of the panel module 30 to avoid the phenomenon of uneven capacitance change. The assembling method of the bottom cover 60 and the side wall bracket 20 can be, for example, the assembling method of the first embodiment, that is, the stopper 231 and the edge portion 61 overlap in the vertical projection direction, and the stopper 231 is used to The edge portion 61 of the bottom cover 60 is limited. The assembling method of the bottom cover 60 and the side wall bracket 20 may also adopt the assembling method of the second embodiment. That is, at least two sliding grooves 25 (refer to FIG. 3) are provided on the side wall 23. The edge portion 61 is connected to the sliding groove 25, and the sliding of the edge portion 61 in the sliding groove 25 is restricted. The above-mentioned arc shape or step shape is merely an example, but it is not limited. The design of the other bottom cover 60 can make the distance between the central portion 63 and the protective cover 10 greater than the distance between the edge portion 61 and the protective cover 10. The scope of protection for this case.

The touch display in the first to third embodiments is an example of a self-luminous display, for example, a light emitting diode (LED) display module, or an organic light emitting diode (Organic Light Emitting Diode). OLED) display module. Referring to FIG. 5, FIG. 5 is a schematic cross-sectional view of a fourth embodiment of a touch display. The fourth embodiment is different from the foregoing embodiments. The panel module 30 of the fourth embodiment may be a liquid crystal display module. Since the liquid crystal display module itself does not emit light, an external backlight module 33 is required to provide light. Here, the backlight module 33 is located between the panel module 30 and the deformable buffer 40. This design allows light to be transmitted into the panel module 30 without being shielded by the deformable buffer 40 or the deformable conductive layer 50, so that the touch display 100 can provide stable optical properties. For example, the backlight module 33 is a direct-type backlight module, but is not limited thereto. The backlight module 33 may also be an edge-light type backlight module. The edge-lit backlight module 33 guides light to the panel module 30 through a light-guiding method. In addition, it should be noted that the backlight module 33 may include a light source, an optical film, a light guide plate, a lamp cover, a reflective sheet, a frame, and the like, and components required for adjustment may be adjusted according to requirements, which is not particularly limited herein.

6A and 6B, FIG. 6A and FIG. 6B are respectively a schematic cross-sectional view of an embodiment of a panel module of a touch display and a schematic cross-sectional view of another embodiment of a panel module of a touch display. As shown in FIGS. 6A and 6B, in a state where the panel module 30 is a liquid crystal display module, the panel module 30 includes a first substrate 35, a second substrate 37, and a liquid crystal layer 39. The liquid crystal layer 39 is located between the first substrate 35 and the second substrate 37. The first electrode 31 is located on the first substrate 35 and is adjacent to the liquid crystal layer 39. In FIG. 6A, the first substrate 35 is, for example, a color filter substrate, and the second substrate 37 is, for example, an array substrate. The first electrode 31 is provided on the color filter substrate side and faces the array substrate. In some embodiments, the first electrode 31 may be a common electrode of a liquid crystal display. For example, in some embodiments, the first electrode 31 may be driven in a self-capacitive manner to detect a change in the capacitance value caused by pressing and touching. In more detail, in some embodiments, the first electrode 31 is controlled in a time-sharing manner to achieve display and detection operations. In addition, in some embodiments, the first electrode 31 is deposited on the surface of the first substrate 35 by evaporation, sputtering, physical vapor deposition, or chemical vapor deposition.

As shown in FIG. 6B, the first substrate 35 is, for example, a color filter substrate, and the second electrode 37 is, for example, an array substrate. FIG. 6B is the opposite of FIG. 6A. The first electrode 31 is provided on the array substrate and faces the color filter substrate. For example, the first electrode 31 may be an in-plane switch (IPS) electrode, and generates an electric field parallel to the panel when the electrode is driven. In some embodiments, the first electrode 31 can be used as a common electrode of a liquid crystal display. Further, the first electrode 31 can be driven in a self-capacitive manner, and can detect a touch by pressing. In more detail, the first electrode 31 may be controlled in a time-sharing manner to achieve display and detection operations. The above method is merely an example, and is not limited to this. For example, another electrode may be added to perform sensing in a mutual capacitance manner to achieve the above-mentioned function. For example, the deformable conductive layer 50 of the mutual capacitance type will be Distributed at the transmitter (Tx) end area, the receiver (Rx) end can change the received signal.

Furthermore, referring to FIGS. 1 to 5 again, the panel module 30 can be fixed on the protective cover 10 through an optical adhesive 70. The optical adhesive 70 is a transparent material, which is transparent after being cured, so as not to affect the display function of the panel module 30. Furthermore, the optical adhesive 70 also has an insulation effect to prevent water vapor from entering, and to avoid the component caused by water vapor. Oxidation can maintain the life of each component. In addition, the optical adhesive 70 may be disposed between the protective cover 10 and the side wall bracket 20.

Here, the position of the force actually applied and the magnitude of the force are estimated mainly by the change in capacitance caused by the deformation between the first electrode 31 and the deformable conductive layer 50. In addition, the capacitance change between the first electrode 31 and the deformable conductive layer 50 can be used to respond to feedback generated by an external feedback generator. In some embodiments, the feedback may be, for example, changes in the screen image, lights, warning sounds, and so on. In this way, there is no need to add another force sensor, which can save costs and reduce the thickness of the touch display 100.

In the above-mentioned embodiment, the deformable cushioning member 40 can provide support and cushioning of the panel module 30, and can dynamically change when the touch display 100 is pressed according to the deformation or recovery of the panel module 30. shape. The deformable conductive layer 50 also has a function of being deformable and reversible, and can be deformed or reverted according to the strength of being pressed. Therefore, the deformation of the deformable conductive layer 50 substantially corresponds to the deformation of the first electrode 31, which can effectively reduce the variation in the capacitance change when pressed. Further, the pressing position and the pressing force can be calculated by the uniform change of the capacitance value between the first electrode 31 and the deformable conductive layer 50 in the panel module 30, so that the existing structure can be used to simply change and improve at the same time. The product's service life, yield, and detection results.

Although the preferred embodiment is disclosed as described above, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the scope of the present invention. Therefore, the scope of patent protection of the present invention Subject to the scope of the patent application attached to this specification.

100‧‧‧Touch display

10‧‧‧ protective cover

20‧‧‧ sidewall bracket

21‧‧‧Frame

23‧‧‧ sidewall

231‧‧‧stop

25‧‧‧chute

30‧‧‧ Panel Module

31‧‧‧first electrode

33‧‧‧ backlight module

35‧‧‧first substrate

37‧‧‧second substrate

39‧‧‧LCD layer

40‧‧‧ deformable cushion

41‧‧‧Sealed bag body

43‧‧‧fluid materials

50‧‧‧ deformable conductive layer

60‧‧‧Cover

61‧‧‧Edge

63‧‧‧ Central

70‧‧‧optical glue

FIG. 1 is a schematic cross-sectional view of a first embodiment of a touch display. FIG. 2 is a schematic cross-sectional view of a first embodiment of a touch display in a pressed state. 3 is a schematic cross-sectional view of a second embodiment of a touch display. 4 is a schematic cross-sectional view of a third embodiment of a touch display. 5 is a schematic cross-sectional view of a fourth embodiment of a touch display. 6A is a schematic cross-sectional view of an embodiment of a panel module of a touch display. 6B is a schematic cross-sectional view of another embodiment of a panel module of a touch display.

Claims (14)

A touch display includes: a protective cover; a panel module under the protective cover, the panel module including a first electrode; a side wall bracket located at the periphery of the panel module, and an upper end of the side wall bracket is assembled The protective cover; a bottom cover movably assembled to the lower end of the side wall bracket; a deformable buffer member located between the panel module and the bottom cover; and a deformable conductive layer located in the deformable buffer The piece faces away from a surface of the panel module. The touch display according to claim 1, wherein the deformable buffer comprises a sealed bag body and a fluid material, and the fluid material is filled in the sealed bag body. The touch display according to claim 2, wherein the fluid material is oil, silicone, or latex. The touch display according to claim 1, wherein the side wall bracket comprises: a frame surrounding and assembling the protective cover; and a side wall extending from the frame toward the bottom cover. The touch display according to claim 1, wherein the deformable conductive layer is a mesh structure. The touch display according to claim 1, wherein an edge portion of the bottom cover is connected to at least two sliding grooves of the side wall bracket. The touch display according to claim 1, wherein the side wall bracket includes a side wall extending toward the bottom cover, the side wall bracket further includes a stopper portion, and the stopper portion extends from the side wall of the side wall bracket. Perpendicular to the projection direction of the stopper, the stopper at least partially overlaps with an edge portion of the bottom cover, and the edge portion of the bottom cover is at least partially located between the deformable buffer and the stopper. The touch display according to claim 1, wherein the bottom cover includes an edge portion and a central portion surrounded by the edge portion, and a distance between the central portion and the protective cover is greater than a distance between the edge portion and the protective cover. . The touch display according to claim 8, wherein the edge portion has a stepped structure from the outer side to the central portion. The touch display according to claim 8, wherein the edge portion has an arc structure from the outer side to the central portion. The touch display according to claim 1, wherein the panel module is a self-luminous display module. The touch display according to claim 1, further comprising a backlight module, which is located between the panel module and the deformable buffer. The touch display according to claim 1, wherein the panel module includes a first substrate, a second substrate, and a liquid crystal layer, and the liquid crystal layer is located between the first substrate and the second substrate. An electrode system is located on the first substrate and is adjacent to the liquid crystal layer. The touch display according to claim 1, wherein the panel module is fixed on the protective cover through an optical adhesive.