CN107329603B

CN107329603B - Touch display module and electronic equipment

Info

Publication number: CN107329603B
Application number: CN201610282483.8A
Authority: CN
Inventors: 江忠胜; 刘丹; 孙伟
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2016-04-29
Filing date: 2016-04-29
Publication date: 2021-04-02
Anticipated expiration: 2036-04-29
Also published as: CN107329603A

Abstract

The disclosure discloses a touch display module and electronic equipment, and belongs to the technical field of touch display. The touch display module comprises: the liquid crystal display panel comprises an upper polarizer, a color filter CF substrate, a liquid crystal layer, a thin film transistor TFT array substrate, a lower polarizer, a first electrode layer, a second electrode layer and a driving Integrated Circuit (IC) component, wherein the upper polarizer, the color filter CF substrate, the liquid crystal layer, the thin film transistor TFT array substrate and the lower polarizer are sequentially arranged from top to bottom; the problem of large occupied volume caused by the fact that the display module and the pressure touch module are separately arranged is solved; the display touch module can realize the image display function and the pressure touch detection function, achieves the effect of saving cost and volume and enabling the functions to be more integrated without adding an additional pressure touch display module.

Description

Touch display module and electronic equipment

Technical Field

The present disclosure relates to the field of touch display technologies, and in particular, to a touch display module and an electronic device.

Background

Touch screens in electronic devices such as mobile phones and tablet computers are composed of a plurality of modules, and different modules are used for achieving different functions.

The touch screen comprises a display module, wherein the display module is used for displaying images under the drive of a drive IC (integrated circuit); the touch screen can further comprise a pressure touch module used for detecting the pressure touch signal.

However, the conventional pressure touch module and the display module are separately arranged, and occupy a large volume.

Disclosure of Invention

In order to solve the problem that the functions that the touch display module can realize are few, the disclosure provides a touch display module and an electronic device. The technical scheme is as follows:

according to a first aspect of the embodiments of the present disclosure, a touch display module is provided, which includes: an upper polarizer, a CF (Color Filter) substrate, a liquid crystal layer, a TFT (Thin Film Transistor) array substrate, and a lower polarizer arranged in this order from top to bottom;

touch-control display module assembly still includes: the driving circuit comprises a first electrode layer, a second electrode layer and a driving IC assembly;

the first electrode layer is positioned above the liquid crystal layer, and the second electrode layer is positioned below the liquid crystal layer;

the driving IC component is electrically connected with the first electrode layer and the second electrode layer respectively;

the driving IC component is used for controlling the first electrode layer and the second electrode layer to be switched between a display mode and a pressure touch mode.

Optionally, in the display mode, the driving IC assembly is configured to control the second electrode layer to output a VCOM reference voltage;

in the pressure touch mode, the driving IC component is used for controlling the first electrode layer to output voltage and controlling the second electrode layer to be grounded, so that a coupling capacitor is formed between the first electrode layer and the second electrode layer.

Optionally, the display mode corresponds to a first duty cycle, and the pressure touch mode corresponds to a second duty cycle, where the first duty cycle and the second duty cycle are not overlapped with each other.

Optionally, the driver IC assembly comprises: a display IC, a pressure touch IC and a switch component;

the switch component alternatively electrically connects one of the display IC and the pressure touch IC with the first electrode layer and the second electrode layer respectively.

Optionally, the liquid crystal layer includes: an array of supports and liquid crystals.

Optionally, the first electrode layer includes a plurality of first transparent electrodes arranged in parallel along a first direction, and the second electrode layer includes a plurality of second transparent electrodes arranged in parallel along a second direction; wherein the first direction and the second direction are perpendicular.

Optionally, the first electrode layer is located between the upper polarizer and the CF substrate.

Optionally, the second electrode layer is located between the liquid crystal layer and the TFT array substrate.

Optionally, the touch display module further includes: a common touch sensor and a common touch IC;

the common touch sensor is positioned on the upper polaroid;

the common touch sensor is electrically connected with the common touch IC.

According to a second aspect of embodiments of the present disclosure, there is provided an electronic apparatus including: the touch display module comprises a touch display module and a processor;

the touch display module includes: the upper polarizer, the CF substrate, the liquid crystal layer, the TFT array substrate and the lower polarizer are sequentially arranged from top to bottom;

the driving IC component is used for controlling the first electrode layer and the second electrode layer to be switched between a display mode and a pressure touch mode;

the driving IC component is also electrically connected with the processor through the bus.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

controlling the first electrode layer and the second electrode layer to be alternatively switched between a display mode and a pressure touch mode through the driving IC component; the problem of large occupied volume caused by the fact that the display module and the pressure touch module are separately arranged is solved; the display touch module can realize the image display function and the pressure touch detection function, achieves the effect of saving cost and volume and enabling the functions to be more integrated without adding an additional pressure touch display module.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a touch display module according to an exemplary embodiment;

FIG. 2 is a schematic structural diagram of a touch display module according to another exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a configuration of a first transparent electrode and a second transparent electrode according to another exemplary embodiment;

FIG. 4 is a schematic diagram illustrating a duty cycle of a touch display module according to another exemplary embodiment;

FIG. 5 is a schematic structural diagram of a touch display module according to another exemplary embodiment;

FIG. 6 is a schematic structural diagram of a touch display module according to another exemplary embodiment;

fig. 7 is a schematic structural diagram of an electronic device according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic structural diagram of a touch display module according to an exemplary embodiment, and as shown in fig. 1, the touch display module 10 includes: an upper polarizer 110, a CF substrate 120, a liquid crystal layer 130, a TFT array substrate 140 and a lower polarizer 150 arranged in sequence from top to bottom.

As shown in fig. 1, the touch display module 10 further includes: a first electrode layer 160, a second electrode layer 170, and a driving IC assembly 180.

The first electrode layer 160 is located above the liquid crystal layer 130, and the second electrode layer 170 is located below the liquid crystal layer 130.

The driving IC assembly 180 is electrically connected to the first electrode layer 160 and the second electrode layer 170, respectively, and the driving IC assembly 180 is used for controlling the first electrode layer 160 and the second electrode layer 170 to switch between a display mode and a pressure touch mode.

In summary, the touch display module provided in the embodiment of the present disclosure controls the first electrode layer and the second electrode layer to switch between the display mode and the pressure touch mode alternatively by the driving IC module; the problem of large occupied volume caused by the fact that the display module and the pressure touch module are separately arranged is solved; the display touch module can realize the image display function and the pressure touch detection function, achieves the effect of saving cost and volume and enabling the functions to be more integrated without adding an additional pressure touch display module.

Fig. 2 is a schematic structural diagram of a touch display module according to another exemplary embodiment, and as shown in fig. 2, the touch display module 20 includes: an upper polarizer 210, a CF substrate 220, a liquid crystal layer 230, a TFT array substrate 240 and a lower polarizer 250 arranged in sequence from top to bottom.

The CF substrate 220 includes a glass substrate and a CF disposed on the glass substrate, and the CF includes a black matrix, a color layer, an ITO (Indium Tin Oxide) conductive film, and the like.

The TFT array substrate 240 includes a glass substrate and a TFT array disposed on the glass substrate, the TFT array includes a plurality of TFTs, each TFT corresponds to a liquid crystal cell in the liquid crystal layer, and the TFT is configured to generate an electric field change when turned on, so as to cause a deflection of liquid crystal in the liquid crystal cell corresponding to the TFT.

Alternatively, the liquid crystal layer 230 includes: the liquid crystal display device comprises a support array 231 and a liquid crystal 232, wherein the support array 231 is used for preventing the liquid crystal 232 from being extruded, the support array 231 is used for generating deformation according to a pressure value of a pressure touch signal when receiving the pressure touch signal, and a preset corresponding relation exists between the deformation amount of the deformation and the pressure value. The supports in the support array 231 may be made of an elastic material such as rubber, resin, or the like.

Optionally, as shown in fig. 2, the touch display module 20 further includes: the backlight assembly 260. The backlight assembly 260 is used to provide light to the liquid crystal.

As shown in fig. 2, the touch display module 20 further includes: a first electrode layer 270, a second electrode layer 280 and a driving IC assembly 290.

The first electrode layer 270 is located above the liquid crystal layer 230, and the second electrode layer 280 is located below the liquid crystal layer 230.

Optionally, the first electrode layer 270 is located between the upper polarizer 210 and the CF substrate 220. Optionally, the second electrode layer 280 is located between the liquid crystal layer 230 and the TFT array substrate 240. By arranging the first electrode layer 270 and the second electrode layer 280 in the above manner, the distance between the two electrode layers is more reasonable, and the pressure touch detection device is better suitable for pressure touch detection. Of course, in other possible embodiments, the first electrode layer 270 may be located at other positions above the liquid crystal layer 230, and the second electrode layer 280 may be located at other positions below the liquid crystal layer 230, which is not limited in this embodiment.

The driving IC assembly 290 is electrically connected to the first electrode layer 270 and the second electrode layer 280, respectively.

Alternatively, the first electrode layer 270 includes a plurality of first transparent electrodes arranged in parallel along a first direction; the second electrode layer comprises a plurality of second transparent electrodes which are arranged in parallel along a second direction, wherein the first direction is vertical to the second direction. For example, the first direction is the lateral direction and the second direction is the longitudinal direction; alternatively, the first direction is longitudinal and the second direction is transverse. The first transparent electrode and the second transparent electrode are made of a transparent conductive material such as ITO, IZO (Indium Zinc Oxide), AZO (Aluminum Zinc Oxide), and the like, and the material and the manufacturing process of the first transparent electrode and the second transparent electrode are not limited in this embodiment.

The driving IC assembly 290 is electrically connected to the first electrode layer 270 and the second electrode layer 280, respectively, that is, the driving IC assembly 290 is electrically connected to the plurality of first transparent electrodes included in the first electrode layer 270, and the driving IC assembly 290 is electrically connected to the plurality of second transparent electrodes included in the second electrode layer 280.

Optionally, the driving IC assembly 290 includes: the display IC 291, the pressure touch IC 292, and the switch 293, wherein the switch 293 selectively connects one of the display IC 291 and the pressure touch IC 292 to the first electrode layer 270 and the second electrode layer 280, respectively.

In the first duty cycle, the switch assembly 293 controls the display IC 291 to be electrically connected to the first electrode layer 270 and the second electrode layer 280, respectively, the first electrode layer 270 and the second electrode layer 280 operate in the display mode, and the display IC 291 is configured to control the second transparent electrode in the second electrode layer 280 to output the VCOM reference voltage.

As shown in fig. 3, first transparent electrodes 1 to M are arranged in parallel in the longitudinal direction, and second transparent electrodes 1 to N are arranged in parallel in the lateral direction, and the first transparent electrodes 1 to M and the second transparent electrodes 1 to N are used to drive a plurality of liquid crystal cells 30 among the liquid crystal cells. In the display mode, the display IC sequentially sends scanning signals to the plurality of first transparent electrodes in the first electrode layer, so that the first transparent electrodes receiving the scanning signals set a corresponding row of liquid crystal cells in a working state, and meanwhile, the display IC generates gray scale voltages according to the VCOM reference voltage and gray scale information corresponding to the liquid crystal cells and outputs the gray scale voltages to the liquid crystal cells corresponding to the row, thereby realizing the display function of the whole display image.

In a second working period, the switch component 293 controls the pressure touch IC 292 to be electrically connected to the first electrode layer 270 and the second electrode layer 280, respectively, the first electrode layer 270 and the second electrode layer 280 work in a pressure touch mode, and the pressure touch IC 292 is used for controlling the first electrode layer 270 to output a voltage and controlling the second electrode layer 280 to be grounded, so that a coupling capacitance is formed between the first electrode layer 270 and the second electrode layer 280.

As shown in fig. 3, in the pressure touch mode, for a detection point 31 at a vertical intersection of a first transparent electrode in the first electrode layer 270 and a second transparent electrode in the second electrode layer 280, when a pressure touch signal is not received, the first transparent electrode and the second transparent electrode form a coupling capacitance at the detection point 31, the pressure touch IC 292 detects a coupling capacitance value at the detection point 31, the coupling capacitance value has a correlation with a distance between the first electrode layer 270 and the second electrode layer 280, and when the distance between the first electrode layer 270 and the second electrode layer 280 changes due to pressure, the coupling capacitance value also changes accordingly.

When the pressure touch signal is received at the detecting point 31, the support array 231 in the liquid crystal layer 230 deforms correspondingly according to the magnitude of the received pressure value, so as to change the distance between the first electrode layer 270 and the second electrode layer 280, which results in a change in the coupling capacitance value between the first electrode layer 270 and the second electrode layer 280 detected by the pressure touch IC, and the pressure touch IC determines the magnitude of the received pressure value according to the coupling capacitance difference. For example, when the pressure value received at the detecting point 31 is F, which causes the pressure touch IC to detect that the coupling capacitance between the first electrode layer 270 and the second electrode layer 280 at the detecting point 31 is changed from C1 to C2, the received pressure value is F according to the coupling capacitance differences C2-C1.

As shown in fig. 4, which exemplarily shows a time diagram of the first duty cycle 410 and the second duty cycle 420, the display IC 291 sequentially sends a scanning signal to each of the first transparent electrodes in the first duty cycle 410, where the scanning signal is a pulse signal for setting a row of liquid crystal cells corresponding to the first transparent electrodes to an operating state; the pressure touch IC 292 transmits a second scan signal, which is a pulse signal, to the first transparent electrode in the second duty cycle 420, and is used to detect the coupling capacitance between the first transparent electrode and the second transparent electrode.

The first working period and the second working period are not overlapped with each other so as to realize peak staggering scanning of VCOM reference voltage and pressure touch signals.

It should be noted that, in the whole working process of the touch display module, a plurality of first working cycles and a plurality of second working cycles may be included, where any two working cycles do not overlap with each other. Alternatively, the period lengths of the different duty cycles may be different, and the frequency of occurrence of the different duty cycles may also be different, as shown in fig. 4, when two first duty cycles 410 occur, a second duty cycle 420 occurs once.

Alternatively, the display IC 291 and the pressure touch IC 292 are instead implemented as one driver IC that controls the first electrode layer 270 and the second electrode layer 280 to alternately switch between the display mode and the pressure touch mode.

Optionally, in another optional embodiment based on the foregoing embodiment, as shown in fig. 5, the touch display module 20 further includes: a normal touch sensor 510 and a normal touch IC 520.

The normal touch sensor 510 is located on the upper polarizer 210. The normal touch sensor 510 is electrically connected to the normal touch IC 520.

The normal touch sensor 510 includes a third electrode layer 511, a transparent insulating layer 512 and a fourth electrode layer 512, the third electrode layer 511 is above the transparent insulating layer 512, the fourth electrode layer 513 is below the transparent insulating layer 512, and the normal touch IC 520 is electrically connected to the third electrode layer 511 and the fourth electrode layer 512, respectively, as shown in fig. 6.

The third electrode layer 511 includes a plurality of third transparent electrodes arranged in parallel along a third direction; the fourth electrode layer includes a plurality of fourth transparent electrodes arranged in parallel along a fourth direction, wherein the third direction is perpendicular to the fourth direction. For example, the third direction is the lateral direction and the fourth direction is the longitudinal direction; alternatively, the third direction is longitudinal and the fourth direction is transverse. The common touch IC 520 is electrically connected to the third transparent electrodes and the fourth transparent electrodes, and the schematic structural diagram of the third transparent electrodes and the fourth transparent electrodes can be combined with fig. 3, which is not repeated in this embodiment.

The common touch IC 520 is used to control the fourth electrode layer as a Tx channel for transmitting signals and control the third electrode layer as an Rx channel for receiving signals, so that mutual capacitance is formed between the third electrode layer and the fourth electrode layer.

As shown in fig. 3, for the detecting point 31 at the vertical intersection 41 between the third transparent electrode of the third electrode layer and the fourth transparent electrode of the fourth electrode layer, the fourth transparent electrode transmits a signal to the third transparent electrode to form a mutual capacitance, the normal touch IC detects the signal received by the third transparent electrode in the third electrode layer, when the normal touch signal acts on the detecting point 31, the signal transmitted by the fourth transparent electrode is also received by the conductor of the touch display module, such as a human body, a capacitive pen, etc., which causes a change in the signal received by the third transparent electrode, the capacitance value of the mutual capacitance at the detecting point 31 detected by the normal touch IC 520 changes, and when the change in the mutual capacitance at the detecting point 31 is detected, it is determined that the normal touch signal acts on the detecting point 31.

It should be noted that, in the present embodiment, the common touch sensor 510 may also be a resistive touch screen structure, a self-capacitance touch screen structure, or other touch screen structures, which is not limited in the present embodiment.

The touch display module that this disclosed embodiment provided still includes ordinary touch sensor and ordinary touch IC, ordinary touch IC be used for with ordinary touch sensor electric connection for detect ordinary touch signal through ordinary touch sensor, reached touch display module and can not only support image display and pressure touch signal and detect, can also detect ordinary touch signal, richened the effect of touch display module's function.

Fig. 7 is a schematic structural diagram illustrating an electronic device according to an exemplary embodiment, the electronic device including: a touch display module 710 and a processor 720.

The touch display module 710 includes: an upper polarizer, a CF substrate, a liquid crystal layer, a TFT array substrate and a lower polarizer which are arranged from top to bottom in sequence.

The touch display module 710 further includes: the device comprises a first electrode layer, a second electrode layer and a driving Integrated Circuit (IC) assembly.

The first electrode layer is located above the liquid crystal layer, and the second electrode layer is located below the liquid crystal layer.

The driving IC component is electrically connected with the first electrode layer and the second electrode layer respectively.

The structure of the touch display module 710 can refer to the descriptions and illustrations in the embodiments shown in fig. 1, fig. 2, or fig. 5, which are not repeated herein.

The driver IC components are also electrically connected to the processor 720 via a bus.

And the processor 720 is used for sending image data of a display image to the driving IC assembly in the first working period, so that the driving IC assembly controls the first electrode layer and the second electrode layer to display the display image according to the image data.

The processor 720 is further configured to receive the pressure touch signal sent by the driving IC component in the second duty cycle, and execute a corresponding instruction according to the pressure touch signal.

Optionally, the common touch IC is also electrically connected to the processor 820 through a bus.

The processor 720 is configured to receive a normal touch signal sent by the normal touch IC and execute a corresponding instruction according to the normal touch signal.

To sum up, the embodiment of the present disclosure provides a touch display module in an electronic device, which controls a first electrode layer and a second electrode layer to switch between a display mode and a pressure touch mode alternatively by a driving IC module; the problem of large occupied volume caused by the fact that the display module and the pressure touch module are separately arranged is solved; the display touch module can realize the image display function and the pressure touch detection function, achieves the effect of saving cost and volume and enabling the functions to be more integrated without adding an additional pressure touch display module.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The utility model provides a touch-control display module assembly which characterized in that, touch-control display module assembly includes: the upper polarizer, the color filter CF substrate, the liquid crystal layer, the thin film transistor TFT array substrate and the lower polarizer are sequentially arranged from top to bottom;

the touch display module further comprises: the driving circuit comprises a first electrode layer, a second electrode layer and a driving IC assembly;

the driving IC component is used for controlling the first electrode layer and the second electrode layer to be alternatively switched between a display mode and a pressure touch mode;

the drive IC component is used for determining a received pressure value according to a difference value between a coupling capacitance value of a pressure touch signal which is not received at a detection point and a coupling capacitance value of a pressure touch signal which is received at the detection point in the pressure touch mode, and the coupling capacitance value of the coupling capacitance is determined according to a distance between the first electrode layer and the second electrode layer;

in the display mode, the driving IC component is used for controlling the second electrode layer to output a VCOM reference voltage;

in the pressure touch mode, the driving IC component is configured to control the first electrode layer to output a voltage and control the second electrode layer to be grounded, so that a coupling capacitance is formed between the first electrode layer and the second electrode layer, wherein a second scanning signal which is a pulse signal is sent to a first transparent electrode in the first electrode layer, so as to detect the coupling capacitance between the first transparent electrode and a second transparent electrode in the second electrode layer, thereby implementing a pressure touch detection function.

2. The touch display module of claim 1, wherein the display mode corresponds to a first duty cycle, the pressure touch mode corresponds to a second duty cycle,

wherein the first duty cycle and the second duty cycle do not overlap with each other.

3. The touch display module of claim 1, wherein the driver IC assembly comprises: a display IC, a pressure touch IC and a switch component;

4. The touch display module of claim 1, wherein the liquid crystal layer comprises: an array of supports and liquid crystals.

5. The touch display module of claim 1, wherein the first electrode layer comprises a plurality of first transparent electrodes arranged in parallel along a first direction, and the second electrode layer comprises a plurality of second transparent electrodes arranged in parallel along a second direction;

wherein the first direction and the second direction are perpendicular.

6. The touch display module of claim 1, wherein the first electrode layer is located between the upper polarizer and the CF substrate.

7. The touch display module of claim 1, wherein the second electrode layer is located between the liquid crystal layer and the TFT array substrate.

8. The touch display module according to any one of claims 1 to 7, further comprising: a common touch sensor and a common touch IC;

the common touch sensor is positioned on the upper polaroid;

the common touch sensor is electrically connected with the common touch IC.

9. An electronic device, characterized in that the electronic device comprises: the touch display module comprises a touch display module and a processor;

the touch display module comprises: the upper polarizer, the color filter CF substrate, the liquid crystal layer, the thin film transistor TFT array substrate and the lower polarizer are sequentially arranged from top to bottom;

the drive IC component is also electrically connected with the processor through a bus;