CN107102770B - Touch control display device - Google Patents
Touch control display device Download PDFInfo
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- CN107102770B CN107102770B CN201710220958.5A CN201710220958A CN107102770B CN 107102770 B CN107102770 B CN 107102770B CN 201710220958 A CN201710220958 A CN 201710220958A CN 107102770 B CN107102770 B CN 107102770B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- Liquid Crystal (AREA)
Abstract
The invention relates to the technical field of display, and discloses a touch display device which is used for improving the narrow frame effect and the touch sensitivity of the touch display device. Touch-sensitive display device includes: touch-control display module assembly, backlight unit and forced induction electrode, backlight unit includes: a back plate having a recess and a reflective sheet positioned in the recess; wherein: the backplate includes bottom plate and a plurality of curb plate, and bottom plate and a plurality of curb plate enclose into the depressed part, and the interval is equipped with the arch on the bottom plate, and the reflector plate sets up in protruding top, does not be equipped with the bellied part between and form the clearance with the bottom plate, and the forced induction electrode is located one side that the reflector plate deviates from the backplate.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch display device.
Background
Touch screens (also called touch screens and touch panels) are the simplest, most convenient and natural man-machine interaction mode at present as an input medium. The touch screen can receive an input touch signal, and therefore, the touch screen is increasingly applied to various electronic products to form a touch display device, such as a mobile phone, a notebook computer, an MP3/MP4, and the like.
The touch display device generally operates such that when an object, such as a human finger or a stylus, touches the device, a haptic feedback system on the device can drive various link devices according to a preprogrammed program, thereby replacing a mechanical button panel and creating a vivid video effect by means of a display screen. As a latest computer input device, the touch screen is the simplest, convenient and natural man-machine interaction mode at present. The multimedia interactive device gives the multimedia a brand-new appearance and is a brand-new multimedia interactive device with great attractiveness. The method is mainly applied to inquiry of public information, leadership office, industrial control, military command, electronic games, song and dish ordering, multimedia teaching, real estate pre-sale and the like. The pressure touch technology realizes more touch functions by increasing the detection of the pressure, and simultaneously outputs pressure feedback of different levels by judging the pressure, thereby bringing better touch experience to consumers.
The structure of the conventional touch display device is shown in fig. 1, fig. 2 and fig. 3, and includes an upper polarizer 01, a display panel 02, a lower polarizer 03, a pressure touch electrode 04, and a backlight module 05, where the backlight module 05 mainly includes: backplate 051, be located the gluey frame 055 of backplate 051, reflector plate 052, light guide plate 053 and optical film material 054, in order to realize the change of electric capacity, according to the relation between interval and the electric capacity, will generally set up certain clearance an between pressure touch electrode and the optical film material, in order to form this clearance an, generally overlap joint the both ends of pressure touch electrode on gluey frame and shading sticky tape 06, the middle part of pressure touch electrode is unsettled, when touching and pressing display panel, display panel and pressure touch electrode can take place the deformation, clearance an will change, realize the change of electric capacity according to this, so that realize touch-control and show.
However, as the display device is continuously narrowed, the widths of the rubber frame and the light-shielding adhesive tape are continuously reduced, and at this time, the pressure touch electrode cannot be lapped on the rubber frame and the light-shielding adhesive tape and can only be attached to the lower polarizer, so that the gap a becomes small, the gap a becomes unstable, the capacitance change is unstable, and the realization of touch display is not facilitated.
Disclosure of Invention
The invention provides a touch display device, which is used for improving the narrow frame effect and the touch sensitivity of the touch display device.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a touch display device, comprising: touch-control display module assembly, backlight unit and forced induction electrode, backlight unit includes: a back plate having a recess and a reflective sheet positioned within the recess; the backboard comprises a bottom board and a plurality of side boards, the bottom board and the side boards enclose the concave parts, bulges are arranged on the bottom board at intervals, the reflector plate is arranged above the bulges and a gap is formed between the part, which is not provided with the bulges, of the bottom board, and the pressure sensing electrode is positioned on one side, which deviates from the backboard, of the reflector plate.
According to the touch display device provided by the invention, the bulge is arranged on the bottom plate, the reflector plate is arranged above the bulge, the pressure sensing electrode is positioned on one side of the reflector plate, which is far away from the back plate, so that a gap influencing the size of the pressure sensing capacitor is formed between the reflector plate and the bottom plate, the pressure sensing electrode and the back plate can be used as two polar plates of the pressure sensing capacitor, the capacitance value of the capacitor formed between the pressure sensing electrode and the back plate is changed due to the change of the distance between the pressure sensing electrode and the back plate under the action of touch pressure in a pressure detection stage, and the size of the touch pressure can be obtained by detecting the change of the capacitance value of the capacitor between the pressure sensing electrode and the back plate.
Therefore, compared with the prior art, the touch display device provided by the invention does not need to support the pressure touch electrode through the supporting frame and the shading adhesive tape to form a gap which influences the size of the pressure sensing capacitor with the back plate, so that the frame of the display device can be narrower, the narrow frame effect of the touch display device can be improved, and meanwhile, the size of the gap can be adjusted through the height of the protrusion, and the sensitivity of pressure touch can be improved.
In some alternative embodiments, the back plate is grounded. Since the back plate is generally made of a conductive material, in order to form a pressure sensing capacitor between the pressure sensing electrode and the back plate, the back plate is grounded, or an additional electrode layer is disposed on the back plate, so as to form the pressure sensing capacitor.
In some alternative embodiments, the height of the protrusions is between 0.1 mm and 0.4 mm.
In some alternative embodiments, the protrusion is a plurality of protrusions, and the plurality of protrusions are spaced apart or arranged continuously along the periphery of the bottom plate.
In some optional embodiments, the bottom plate is polygonal, and the protrusions are multiple and located at each corner of the bottom plate.
In some alternative embodiments, the protrusion is a unitary structure with the backplate. Such a structure is convenient to manufacture.
In some optional embodiments, the touch display module includes a touch sensing electrode and a touch driving electrode;
the pressure sensing electrodes are reused as at least part of the touch sensing electrodes or at least part of the touch driving electrodes.
In some optional embodiments, the touch display module further comprises a common electrode;
and the touch driving electrode is reused as the common electrode.
In some optional embodiments, the touch display module includes a touch panel and a display panel;
the pressure sensing electrode is positioned between the lower polarizer of the display panel and the backlight module.
In some optional embodiments, the touch display module includes a touch panel and a display panel;
the touch panel is located on the light emitting side of the display panel, and the pressure sensing electrode is located in the touch panel.
In some optional embodiments, the touch display module includes an array substrate and a color film substrate that are oppositely disposed;
the pressure sensing electrode is arranged in the array substrate or the color film substrate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a touch display device in the prior art;
FIG. 2 is a schematic view of another structure of a touch display device in the prior art;
fig. 3 is a schematic view of a pressed deformation structure of a touch display device in the prior art;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a back plate according to an embodiment of the present invention;
fig. 6a to 6c are schematic plan views illustrating a back plate according to an embodiment of the invention;
fig. 7 is a schematic diagram of a distribution structure of pressure-sensing electrodes according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of another arrangement of pressure sensing electrodes according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the invention;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention.
In the figure:
01-Upper polarizer 02-display Panel
03-lower polarizer 04-pressure touch electrode
05-backlight module 051-backboard
055-rubber frame 052-reflector plate
053-light guide plate 054-optical film material
06-shading adhesive tape
1-touch display module 11-touch panel
12-display panel 121-lower polarizer
13-array substrate 14-color film substrate
2-backlight module 21-back plate
212-side panel 213-bottom panel
2131 raised 22 reflecting sheet
23-optical film material 24-rubber frame
25-light guide plate 3-pressure induction electrode
4-shading adhesive tape 5-touch drive electrode
6-touch induction electrode a, b-gap
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the existing touch display device, in order to realize the change of capacitance, according to the relation between the distance and the capacitance, a certain gap is generally arranged between the pressure touch electrode and the optical film, in order to form the gap, two ends of the pressure touch electrode are generally lapped on the rubber frame and the shading adhesive tape, the middle part of the pressure touch electrode is suspended, when the display panel is touched and pressed, the display panel and the pressure touch electrode can deform, the gap can change, and thus the change of the capacitance is realized, so that the touch display is realized. However, with the continuous narrowing of the frame of the display device, the widths of the rubber frame and the shading adhesive tape are continuously reduced, and at the moment, the pressure touch electrode cannot be lapped on the rubber frame and the shading adhesive tape, so that the gap is reduced, the gap is unstable, the capacitance change is unstable, and the touch display is not facilitated.
In order to solve the above problem, embodiments of the present invention provide a touch display device, which can better meet the requirement of a narrow frame of the display device by changing the position and structure of the gap.
As shown in fig. 4, the present invention provides a touch display device, including: touch-control display module assembly 1, backlight unit 2 and forced induction electrode 3, backlight unit 2 includes: a back plate 21 having a recess and a reflective sheet 22 positioned in the recess; wherein: as shown in fig. 5 and fig. 6a to 6c, the back plate 21 includes a bottom plate 213 and a plurality of side plates 212, the bottom plate 213 and the plurality of side plates 212 enclose a concave portion, the bottom plate 213 is provided with protrusions 2131 at intervals, the reflective sheet 22 is disposed above the protrusions 2131 and forms a gap b with a portion of the bottom plate 213 not provided with the protrusions 2131, and the pressure sensing electrode 3 is located on a side of the reflective sheet 22 away from the back plate 21.
In the touch display device provided by the embodiment of the invention, the protrusion 2131 is arranged on the bottom plate 213, the reflector plate 22 is arranged above the protrusion 2131, the pressure sensing electrode 3 is arranged on one side of the reflector plate 22, which is far away from the back plate 21, so that a gap b influencing the capacitance value of the pressure sensing capacitor is formed between the reflector plate 22 and the bottom plate 213, the pressure sensing electrode 3 and the back plate 21 can be used as two polar plates of the pressure sensing capacitor, in a pressure detection stage, the capacitance value of the capacitor formed between the pressure sensing electrode 3 and the back plate 21 is changed due to the change of the distance between the pressure sensing electrode 3 and the back plate 21 under the action of touch pressure, and the size of the touch pressure can be obtained by detecting the change of the capacitance value of the capacitor between the pressure sensing electrode 3 and the back plate 21.
Therefore, compared with the prior art, the touch display device provided by the invention does not need to support the pressure touch electrode through the support frame and the shading tape 4 to form a gap b which influences the capacitance value of the pressure sensing capacitor with the back plate 21, and the gap b is formed through the protrusions 2131 on the back plate 21, so that the gap b is stable, the recovery time of deformation can be shortened, the frame of the display device can be made narrower, and meanwhile, the size of the gap can be adjusted through the height of the protrusions 2131, and the sensitivity of pressure touch can be improved. Therefore, the touch display device provided by the invention can improve the narrow frame effect and the touch sensitivity of the touch display device.
The backlight module 2 generally further includes a rubber frame 24 disposed in the back plate 21, a light guide plate 25 disposed on the reflective sheet 22, and an optical film 23 disposed on the light guide plate 25, wherein a light-shielding tape 4 is disposed between an upper portion of the rubber frame 24 and the touch display panel 12 to reduce light loss.
It should be noted that in the backlight module 2 provided in the embodiment of the present invention, the reflective sheet 22 may be directly connected to the protrusion 2131 of the back plate 21, or another film layer may be disposed between the reflective sheet 22 and the protrusion 2131.
Since the back plate 21 is generally made of a conductive material, in order to form a pressure sensing capacitor between the pressure sensing electrode 3 and the back plate 21, the back plate 21 is grounded in the embodiment of the present invention, and certainly, an additional electrode layer may be disposed on the back plate 21 to form the pressure sensing capacitor. If an additional electrode layer is provided on the back plate 21, an insulating layer should be provided between the electrode layer and the back plate 21 accordingly.
The height of the protrusions 2131 on the back plate 21 provided in the embodiments of the present invention may be 0.1 mm to 0.4 mm. For example, it may be: 0.1 mm, 0.15 mm, 0.2 mm, 0.26 mm, 0.3 mm, 0.4 mm, etc., which will not be described in detail herein. The height of the protrusion 2131 in the application can be set to a specific value according to the level of the pressure touch sensitivity, when the requirement on the pressure touch sensitivity is low, the height of the protrusion 2131 can be smaller, the reduction of the overall thickness of the touch display device is facilitated, when the requirement on the pressure touch sensitivity is high, the height of the protrusion 2131 can be larger, and the improvement of the touch effect of the touch display device is facilitated.
The specific shape of the protrusion 2131 on the back plate 21 provided in the embodiment of the present invention may be a trapezoid as shown in the drawings, but is not limited to the shape in the drawings provided in the embodiment of the present invention, and optionally, the protrusion 2131 may be a hemisphere, etc., which is not described herein again. In order to prevent the upper ends of the protrusions 2131 from damaging the film layer directly contacting the protrusions, the surfaces of the protrusions 2131 contacting the film material are cambered surfaces.
The specific number of the protrusions 2131 on the back plate 21 in the embodiment of the present invention may be various:
alternatively, as shown in fig. 5, the number of the protrusions 2131 is plural, and the plural protrusions 2131 are spaced apart or arranged continuously along the periphery of the bottom plate 213.
As shown in fig. 6a and 6b, taking the bottom plate as a rectangle as an example, the protrusions 2131 may be continuously provided along the periphery of the bottom plate 213 to form a rectangular area, or may be provided only in the middle of each side of the bottom plate, that is, the protrusions 2131 are provided at intervals along the periphery of the bottom plate 213.
Optionally, the bottom plate 213 is polygonal, and the protrusions 2131 are multiple and located at each corner of the bottom plate 213. As shown in fig. 6c, the bottom plate is rectangular, and the protrusions 2131 are located at four corners of the bottom plate.
Of course, the specific number, size and arrangement of the protrusions 2131 can be set by those skilled in the art according to actual needs.
The protrusion 2131 provided in the embodiment of the present invention may be an integral structure with the back plate 21, or a split structure, if the protrusion 2131 is an integral structure with the back plate 21, the protrusion 2131 may be formed by stamping, or may be formed by one-step casting by providing a mold with a corresponding shape, and the material cost may be reduced by adopting integral molding without separately providing a protrusion part. If the protrusions 2131 and the back plate 21 are of a split structure, the protrusions 2131 and the back plate 21 can be connected in a clamping mode or fixedly connected through fasteners or stuck together through double-sided adhesive, so that when the height of the protrusions 2131 is changed, only the protrusions 2131 need to be replaced, the whole back plate does not need to be replaced, and the cost can be saved.
The specific structure of the touch display module 1 in the touch display device provided by the embodiment of the invention can be various:
as shown in fig. 7 and 8, the touch display module 1 provided in the embodiment of the present invention further includes a touch sensing electrode 6 and a touch driving electrode 5;
the pressure sensing electrodes 3 are reused as at least part of the touch sensing electrodes 6, or at least part of the touch driving electrodes 5.
In an alternative embodiment, the pressure-sensing electrodes 3 are reused as at least part of the touch-sensing driving electrodes 5, as shown in fig. 7, the pressure-sensing electrodes 3 are reused as part of the touch-sensing driving electrodes 5, that is, the pressure-sensing electrodes 3 in the dotted area are reused as the touch-sensing driving electrodes 5, and the touch-sensing driving electrodes 5 in the dotted area are connected to a controller in the touch-sensing display device to have a pressure touch-sensing function. When a user strongly touches the touch display device, pressure touch detection can be realized. In the embodiment provided by the present invention, it can be set according to the needs of the actual application scenario, which areas of the touch display device have the pressure touch detection function (for example, near the upper and lower sides or near the left and right sides of the whole touch display device), and then the touch driving electrodes 5 are multiplexed into the pressure sensing electrodes 3 in the partial areas. If the touch driving electrodes 5 are multiplexed as the pressure sensing electrodes 3, the touch position detection and the pressure touch detection of the two-dimensional plane need to be multiplexed in time division.
In another alternative embodiment, as shown in fig. 8, the pressure sensing electrode 3 is reused as at least part of the touch sensing electrode 6, and when the user touches with force, the controller in the touch display device detects the force of the pressure touch according to the pressure detection capacitance fed back by the pressure sensing electrode 3. In fig. 8, the pressure sensing electrodes 3 in the dashed line area are multiplexed as the touch sensing electrodes 6, and the touch position detection and the pressure touch detection of the two-dimensional plane of the portion need to be multiplexed in a time-sharing manner.
It should be noted that, the above-mentioned mutual capacitance type two-dimensional plane touch is also applicable to self-capacitance type two-dimensional plane touch, at this time, the touch driving electrode and the touch sensing electrode are the same touch electrode, and the pressure sensing electrode of the present application can be reused as the touch electrode.
On the basis of the above embodiment, preferably, the touch display module further includes a common electrode, and the touch driving electrode 5 is reused as the common electrode. According to the optimal mode, on one hand, the thickness of the touch display device can be further reduced, the touch driving electrode 5 and the common electrode are multiplexed, only one etching process is needed in the manufacturing process, no mask plate needs to be manufactured on the touch driving electrode 5 and the common electrode respectively, the manufacturing quantity is reduced, the cost is reduced, and the production efficiency is improved.
It should be noted that the touch display module can be an external touch display module, an overlay touch display module, and an embedded touch display module.
As shown in fig. 9, a touch display module 1 according to an embodiment of the present invention includes a touch panel 11 and a display panel 12; the touch display module can be of an external hanging type, namely, the touch panel and the display panel can be produced separately and then are attached together to form a module with touch and display functions, and can also be of a surface-covered type, namely, the touch panel is formed to share a substrate with the outer surface of the display panel and the display panel;
the pressure-sensitive electrode 3 is located between the lower polarizer 121 of the display panel 12 and the backlight module 2. Due to the structural design, the two-dimensional plane touch detection stage and the pressure touch detection stage of the touch display device can be controlled conveniently.
As shown in fig. 10, a touch display module 1 according to an embodiment of the present invention includes a touch panel 11 and a display panel 12;
the touch panel 11 is located on the light emitting side of the display panel 12, and the pressure-sensitive electrode 3 is located in the touch panel 11. The touch display module can be of an external hanging type, namely, the touch panel and the display panel can be produced separately and then are attached together to form a module with touch and display functions, and can also be of a surface-covered touch display module, namely, the touch panel is formed to share a substrate with the outer surface of the display panel and the display panel, and the pressure sensing electrodes 3 can be multiplexed into at least part of the touch sensing electrodes 6 or at least part of the touch driving electrodes 5. Or may be disposed in a different layer from the touch sensing electrodes 6 and the touch driving electrodes 5 and insulated from each other.
As shown in fig. 11, a touch display module 1 according to an embodiment of the present invention includes an array substrate 13 and a color filter substrate 14, which are disposed opposite to each other, and the touch display module is an embedded touch display module, optionally, a touch driving electrode and a touch sensing electrode may be located in the color filter substrate and the array substrate, or the touch driving electrode is located in the color filter substrate or the array substrate, and the touch sensing electrode is located on a side of the color filter substrate away from the array substrate;
the pressure-sensitive electrodes 3 are disposed on the array substrate 13. When the touch driving electrode is positioned in the array substrate and the touch sensing electrode is positioned in the color film substrate, the pressure sensing electrode is positioned in the array substrate, can be arranged on the same layer with the touch driving electrode, and can reuse part of the touch driving electrode, so that the preparation process steps can be reduced, and the overall thickness of the touch display device can be reduced; the pressure sensing electrode can also be positioned in the array substrate and is insulated from the touch driving electrode in different layers.
As shown in fig. 12, a touch display module 1 according to an embodiment of the present invention includes an array substrate 13 and a color filter substrate 14, which are disposed opposite to each other; the touch display module is an embedded touch display module, optionally, the touch driving electrode and the touch sensing electrode can be positioned in the color film substrate and the array substrate, or the touch driving electrode is positioned in the color film substrate or the array substrate, and the touch sensing electrode is positioned on one side of the color film substrate, which is far away from the array substrate;
the pressure-sensitive electrode 3 is disposed on the color filter substrate 14. When the touch driving electrode is positioned in the array substrate and the touch sensing electrode is positioned in the color film substrate, the pressure sensing electrode is positioned in the color film substrate, can be arranged on the same layer with the touch sensing electrode, and can reuse part of the touch sensing electrode, so that the preparation process steps can be reduced, and the overall thickness of the touch display device can be reduced; the pressure sensing electrode can also be positioned in the color film substrate and is arranged in an insulating way with the touch driving electrode in a different layer.
The touch display device provided by the embodiment of the invention can be any one of a mobile phone, a tablet personal computer, electronic paper and an electronic photo frame.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A touch display device, comprising: touch-control display module assembly, backlight unit and forced induction electrode, its characterized in that, backlight unit includes: a back plate having a recess and a reflective sheet positioned within the recess; wherein:
the backboard comprises a bottom plate and a plurality of side plates, the bottom plate and the side plates enclose the concave part, bulges are arranged on the bottom plate at intervals, the reflector plate is arranged above the bulges and forms a gap with the part of the bottom plate without the bulges, and the pressure sensing electrode is positioned on one side of the reflector plate, which is far away from the backboard;
the touch display module comprises a touch panel and a display panel; the touch panel is positioned on the light emergent side of the display panel; the pressure sensing electrode is positioned between the lower polarizer of the display panel and the backlight module;
the bulge and the back plate are of an integrated structure; the bulge protrudes towards the direction of the pressure sensing electrode;
the bulges are multiple and are arranged at intervals along the periphery of the bottom plate.
2. The touch display device of claim 1, wherein the back plate is grounded.
3. The touch display device of claim 1, wherein the height of the protrusion is 0.1 mm to 0.4 mm.
4. The touch display device of claim 1, wherein the base plate is polygonal, and the protrusions are respectively located at each corner of the base plate.
5. The touch display device according to any one of claims 1 to 4, wherein the touch display module comprises an array substrate and a color film substrate which are arranged oppositely.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710220958.5A CN107102770B (en) | 2017-04-06 | 2017-04-06 | Touch control display device |
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|---|---|---|---|
| CN201710220958.5A CN107102770B (en) | 2017-04-06 | 2017-04-06 | Touch control display device |
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| CN107102770A CN107102770A (en) | 2017-08-29 |
| CN107102770B true CN107102770B (en) | 2020-04-24 |
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| CN108447890B (en) | 2018-04-24 | 2021-10-12 | 京东方科技集团股份有限公司 | Flexible substrate, flexible display panel thereof, flexible display device and method for using flexible display device |
| CN112799532B (en) * | 2021-01-12 | 2022-04-26 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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| CN106415459A (en) * | 2016-09-17 | 2017-02-15 | 深圳市汇顶科技股份有限公司 | Touch pressure detection module and apparatus |
| CN106526936A (en) * | 2016-11-30 | 2017-03-22 | 厦门天马微电子有限公司 | Backlight module and liquid crystal display device |
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| US9612703B2 (en) * | 2014-12-31 | 2017-04-04 | Synaptics Incorporated | Top mount clickpad module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106415459A (en) * | 2016-09-17 | 2017-02-15 | 深圳市汇顶科技股份有限公司 | Touch pressure detection module and apparatus |
| CN106526936A (en) * | 2016-11-30 | 2017-03-22 | 厦门天马微电子有限公司 | Backlight module and liquid crystal display device |
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| Publication number | Publication date |
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| CN107102770A (en) | 2017-08-29 |
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