CN103092420B - A kind of touch display screen and driving method thereof - Google Patents

Abstract

Embodiments of the present invention provide a touch display screen and a driving method thereof, relate to the field of display technology, and can establish an interactive touch display screen that enables users to have tactile sensations. The touch display screen includes a detection module for real-time detection of the current touch position, a conductive layer is arranged on the surface of the touch panel of the touch display screen, and is located in the display area of the touch panel; peripheral circuits are arranged on the touch panel The non-display area of the panel is connected to the conductive layer, and a voltage is applied to the conductive layer, and the applied voltage generates a current on a touch object touching the touch screen.

Description

A kind of touch display screen and driving method thereof

technical field

The invention relates to the field of display technology, in particular to a touch display screen and a driving method thereof.

Background technique

With the development of thin film transistor liquid crystal display (ThinFilmTransistor-LiquidCrystalDisplay, TFT-LCD) technology and the progress of industrial technology, and the increasingly perfect manufacturing process of liquid crystal display devices, TFT-LCD display technology has replaced the cathode ray tube display technology as flat panel display mainstream technology in the field. Due to its own advantages, liquid crystal display has become an ideal display device in the minds of the market and consumers.

With the rise of liquid crystal display in the field of mobile applications, interactive touch screen technology is increasingly favored by consumers, and has become an important technology and a new market growth point that coexists with liquid crystal display. When conducting human-computer interaction, human beings mainly use vision and hearing to realize human-computer interaction through touch screens, while tactile sense can be perceived by human beings just like visual and auditory signals, but it has not been applied in existing human-computer interaction.

Contents of the invention

Embodiments of the present invention provide a touch display screen and a driving method thereof, which can establish an interactive touch display screen that enables users to have tactile sensations.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A touch display screen, including a detection module for real-time detection of the current touch position, the touch display screen also includes:

The conductive layer is arranged on the touch panel surface of the touch display screen and is located in the display area of the touch panel;

The peripheral circuit is arranged in the non-display area of the touch panel, connected to the conductive layer, and applies a voltage to the conductive layer, and the applied voltage generates a current on a touch object contacting the touch display screen.

Preferably, the conductive layer includes at least one touch area, and each of the touch areas is connected to the peripheral circuit through a wire; the peripheral circuit is used to obtain the current touch position from the detection module, and to provide A voltage is applied to the touch area at the current touch position.

Preferably, the conductive layer includes several voltage signal lines, and each of the voltage signal lines is connected to the peripheral circuit through a wire; the peripheral circuit is used to obtain the current touch position from the detection module, and to Voltage is applied to the voltage signal line at the current touch position.

Optionally, the voltage signal lines are distributed vertically and horizontally, or the voltage signal lines are arranged vertically, or the voltage signal lines are arranged obliquely, or the voltage signal lines are distributed circularly.

A method for driving a touch screen, comprising: applying a voltage to the conductive layer, and the applied voltage generates a current on a touch object touching the touch screen.

Preferably, the method specifically includes: obtaining a current touch position of the touch object; applying a voltage to the conductive layer at the current touch position, and the applied voltage generates a current on the touch object contacting the touch screen.

Optionally, the conductive layer includes at least one touch area or the conductive layer includes several voltage signal lines, and correspondingly, applying a voltage to the conductive layer at the current touch position specifically includes: applying a voltage to the conductive layer at the The touch area or voltage signal line at the current touch position is continuously loaded with voltage, or pulsed voltage is loaded at certain periodic intervals, or voltage is loaded within a preset time.

Optionally, the driving method also includes;

When the touch object leaves the touch screen, an initial voltage is applied to the voltage signal line.

Optionally, the conductive layer includes several voltage signal lines, and applying voltage to the voltage signal lines at the current touch position includes: applying voltage to any two adjacent voltage signal lines at the current touch position The signal lines are loaded with different voltages, wherein, the first voltage is applied to one of the voltage signal lines of any two adjacent voltage signal lines, and the first voltage is applied to the adjacent voltage signal lines at the same time the reverse voltage.

Preferably, the voltage difference between any two adjacent voltage signal lines is at least 0.6V.

The above-mentioned technical solution provides a touch display screen and its driving method. A conductive layer is provided on the display area of the touch panel surface of the touch display screen, and a conductive layer is provided on the non-display area of the touch panel to connect the conductive layer. The peripheral circuit of the layer, loads a voltage for the conductive layer, and the loaded voltage can generate current on the touch object that touches the touch screen, so that when the user touches the conductive layer, the voltage loaded on the conductive layer Electric current will be generated in the human body, and the user will feel the electric tactile sensation, so that an interactive touch display screen that enables the user to have a tactile feeling is established.

Description of drawings

FIG. 1 is a schematic top view structure diagram of a touch display screen provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a conductive layer structure of a touch display screen provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of a conductive layer structure of another touch display screen provided by an embodiment of the present invention;

Fig. 4 is a schematic diagram of a conductive layer structure of another touch display screen provided by an embodiment of the present invention;

Fig. 5 is a schematic diagram of a conductive layer structure of another touch display screen provided by an embodiment of the present invention;

Fig. 6 is a schematic diagram of a conductive layer structure of another touch display screen provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a driving signal waveform provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of another driving signal waveform provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of another driving signal waveform provided by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

The embodiment of the present invention provides a touch display screen. As shown in FIG. Set on the surface of the touch panel of the touch display screen, located in the display area of the touch panel; the peripheral circuit 13, set in the non-display area of the touch panel, connected to the conductive layer 12, is the conductive layer A voltage is applied, and the applied voltage generates a current on the touch object contacting the touch display screen. Wherein, the material of the conductive layer 12 is a transparent conductive material, for example, such as ITO (Indium Tin Oxides, indium tin oxide).

When the user uses the touch screen, since the peripheral circuit 13 is loaded with a voltage on the conductive layer 12, when the finger touches the conductive layer 12, the voltage loaded on the conductive layer will generate a current in the human body, and the user will feel the voltage. Haptics, thus creating an interactive touch display that gives the user a sense of touch.

Optionally, as shown in FIG. 2, the conductive layer 12 includes at least one touch area 121, and each of the touch areas is connected to the peripheral circuit through a wire; the peripheral circuit is used to obtain the current touch position, and apply voltage to the touch area on the current touch position.

When the conductive layer includes a touch area, that is, the conductive layer covers the display area of the touch panel as a whole, at this time, when the peripheral circuit obtains the current touch position from the detection module, the peripheral The circuit needs to apply a voltage to the conductive layer, or continuously apply a pulse voltage to the conductive layer at a certain frequency, and the applied voltage generates a current on the touch object touching the touch screen. Wherein, the voltage loaded by the peripheral circuit on the conductive layer will not cause harm to the human body.

As shown in Figure 2, when the conductive layer includes a plurality of touch areas, the size and shape of each touch area can be a reference to the contact surface of a finger on the touch screen, which can be circular or oval, where No restrictions. When the peripheral circuit obtains the current touch position from the detection module, the peripheral circuit needs to apply a voltage to the touch area at the current touch position, and the loaded voltage is on the touch object touching the touch screen generate current. It should be noted here that, for different touch areas, the magnitude of the voltage loaded by the peripheral circuit can be different, so that different positions of the skin will have different electrical stimulation tactile sensations. Facilitate the human-computer interaction of the touch screen.

Or, optionally, as shown in FIG. 3, 4, 5, or 6, the conductive layer 12 includes several voltage signal lines 122, and each of the voltage signal lines is connected to the peripheral circuit through a wire; The circuit is used to obtain the current touch position from the detection module, and apply voltage to the voltage signal line at the current touch position.

Making the voltage signal line requires less material than making the touch area, which can reduce the cost.

Optionally, as shown in FIG. 3 , the voltage signal lines are distributed vertically and horizontally, or as shown in FIG. 4 , the voltage signal lines are arranged vertically, or as shown in FIG. 5 , the voltage signal lines are arranged obliquely. directional arrangement, or as shown in FIG. 6 , the voltage signal lines are distributed in a circle. There may be many ways to distribute the voltage signal lines, for example, the voltage signal lines may also be arranged in a horizontal direction, or distributed in a fan shape, which is not limited here.

The embodiment of the present invention also provides the driving method of the above-mentioned touch display screen, the method comprising:

A voltage is applied to the conductive layer, and the applied voltage generates a current on a touch object contacting the touch display screen.

The structure of the conductive layer in the touch screen provided by the embodiment of the present invention can have many kinds of situations, and there are many kinds of driving methods for each situation, as long as the applied voltage is satisfied when the touch object touching the touch screen to generate current.

For example, voltage may be applied to the conductive layer all the time. If the conductive layer includes only one touch area, that is, the conductive layer is composed of a whole piece of conductive material, the conductive layer is always loaded with a voltage, as long as the user touches the conductive layer, the voltage loaded on the conductive layer An electric current will be generated in the user's body. The user can feel the electrohaptic sensation. The touch screen can utilize the user's sense of touch to perform human-computer interaction. If the conductive layer includes two or more touch areas, each touch area on the conductive layer can also be loaded with voltage all the time, as long as the user touches the touch area, the voltage loaded on the conductive layer will be An electric current is generated in the user's body. If the conductive layer includes several voltage signal lines, each voltage signal line on the conductive layer can also be loaded with voltage all the time, as long as the user touches the touch area, the voltage loaded on the conductive layer will be generated in the user’s body current. Optionally, as shown in FIG. 7 , each voltage signal line may be loaded with high level and low level at intervals according to the routing sequence.

Preferably, in order to reduce power consumption, the driving method may further include: obtaining the current touch position; applying a voltage to the conductive layer at the current touch position, and the applied voltage is applied to the touch object touching the touch screen. generate current.

The touch screen in the prior art includes a detection circuit for real-time detection of the current touch position. When the detection circuit detects the current touch position, it will transmit the information of the current touch position to the peripheral circuit, and the peripheral circuit obtains the current touch position. touch the position; and apply a voltage to the conductive layer at the current touch position, and the applied voltage generates a current on the touch object contacting the touch screen.

Here, if the conductive layer only includes one touch area, the peripheral circuit will apply voltage to the touch area; if the conductive layer includes two or more touch areas, the peripheral circuit will only A voltage is applied to the touch area at the current touch position. If the conductive layer includes several voltage signal lines, the peripheral circuit will only apply voltage to the voltage signal line at the current touch position. Of course, different voltages may be applied to touch areas or voltage signal lines at various positions on the conductive layer. Specifically, different voltages may be applied according to actual conditions, which is not limited here.

The above-mentioned driving method of only applying a voltage to the conductive layer at the current touch position can reduce power consumption compared with always applying a voltage to the conductive layer.

Optionally, the conductive layer includes at least one touch area or the conductive layer includes several voltage signal lines, and there are multiple ways to apply voltage to the conductive layer at the current touch position, specifically including: The touch area or voltage signal line at the current touch position is continuously loaded with voltage, or pulsed voltage is loaded at certain periodic intervals, or voltage is loaded within a preset time. Wherein, the pulse voltage is applied at a certain period interval and the voltage is applied within a preset time, which reduces power consumption compared with continuous application of the voltage.

When the touch object touches the conductive layer, the peripheral circuit continuously applies a voltage to the conductive layer or applies a pulse voltage at a certain periodic interval; when the touch object leaves the touch display screen, the peripheral circuit applies a voltage to the The initial voltage is applied to the voltage signal line. For example, if it is detected that the area near the voltage signal line of the nth row is the current touch position in the second frame of the picture, and the touch object is not detected in the third frame of the picture, then as shown in FIG. 8 , in the second frame During the screen time, the peripheral circuit will apply a pulse voltage to two adjacent voltage signal lines at the current touch position: the voltage signal line of the nth row and the voltage signal line of the n+1th row at a certain period interval, In the third frame, if the user does not touch the display screen, the peripheral circuit will set the voltage on the voltage signal line to an initial voltage, preferably, the initial voltage is 0V.

Or, when the touch object touches the conductive layer, the peripheral circuit applies a voltage to the conductive layer within a preset time, and after the preset time, the peripheral circuit will load an initial voltage to the conductive layer. Voltage. Assuming that the preset time is one frame time, and the area near the voltage signal line of the nth row is detected as the current touch position in the second frame, as shown in FIG. In the frame time, voltage is applied to two adjacent voltage signal lines at the current touch position: the voltage signal line of the nth row and the voltage signal line of the n+1th row. This can prevent the user from touching the display for a long time and causing some damage. Preferably, in order to reduce power consumption, the initial voltage applied to the conductive layer is 0V.

Optionally, when the conductive layer includes several voltage signal lines, applying voltage to the voltage signal lines at the current touch position includes: applying voltage to any two adjacent voltage signal lines at the current touch position The voltage signal lines are loaded with different voltages.

Assuming that the area near the voltage signal line of the nth row is detected as the current touch position in the second frame of the screen, at this time, the peripheral circuit will give two adjacent voltage signal lines at the current touch position: the voltage signal line of the nth row and Different voltages are applied to the voltage signal lines in row n+1. For example, a high voltage, such as xV, is applied to the voltage signal line of the nth row, and a low voltage, such as -xV, is applied to the voltage signal line of the n+1th row, as shown in the second frame of FIG. 9 . Of course, the peripheral circuit can also apply voltage to more rows of voltage signal lines, such as three rows, and apply high voltage to the electrode lines of the nth row, and apply low voltage to the n-1 and n+1th rows, or four rows, such as the first row A high voltage is applied to the electrode lines of the n-2 and n rows, and a low voltage is applied to the n-1 and n+1 rows, etc. It is only necessary to ensure that the voltages loaded on any two adjacent voltage signal lines are different.

Preferably, as shown in FIG. 9 , the first voltage can be applied to a voltage signal line at the current touch position; at the same time, the reverse voltage of the first voltage can be applied to the adjacent voltage signal line . Preferably, the loaded voltage can be divided into three parts. When a touch object is detected, the high voltage applied to the voltage signal line is xV, the low voltage is -xV, and the initial voltage applied when no touch object is touched is 0V. This mode reduces power consumption.

Wherein, the minimum voltage difference between any two adjacent voltage signal lines is 0.6V. Usually, the skin surface resistance of the finger of an ordinary person is ≤2kΩ, and the threshold current of the electric current sense of the ordinary human body is about 0.3mA. According to the formula V=I*R, it can be known that the minimum voltage for the human body is: 0.3mA×2kΩ=0.6V. Since the minimum threshold voltage of the human body is different and the condition of the finger surface skin is different, the voltage difference between adjacent voltage signal lines in the present invention should be kept above 0.6V. The specific voltage can be set in the peripheral circuit according to the physique and psychology of different people.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. a touch display screen, comprising the detection module for detecting current touch location in real time, it is characterized in that, described touch display screen also comprises:

Conductive layer, is arranged on the touch panel surface of described touch display screen, is positioned at the viewing area of described touch panel;

Peripheral circuit, is arranged on the non-display area of described touch panel, connects described conductive layer, is described conductive layer on-load voltage, described voltage generation current in the touch objects of the described touch display screen of contact of loading, thus produces electric touch;

Described conductive layer comprises multiple touch area, and each described touch area is connected to described peripheral circuit by lead-in wire;

Described peripheral circuit, for obtaining current touch location from described detection module, and by lead-in wire to the touch area on-load voltage be on described current touch location.

2. a touch display screen, comprising the detection module for detecting current touch location in real time, it is characterized in that, described touch display screen also comprises:

Conductive layer, is arranged on the touch panel surface of described touch display screen, is positioned at the viewing area of described touch panel;

Peripheral circuit, is arranged on the non-display area of described touch panel, connects described conductive layer, is described conductive layer on-load voltage, described voltage generation current in the touch objects of the described touch display screen of contact of loading, thus produces electric touch;

Described conductive layer comprises some voltage signal lines, and each described voltage signal line is connected to described peripheral circuit by lead-in wire;

Described peripheral circuit, for obtaining current touch location from described detection module, and by lead-in wire to the voltage signal line on-load voltage be on described current touch location.

3. touch display screen according to claim 2, is characterized in that,

Described voltage signal line is in cross-distribution in length and breadth, or described voltage signal line is longitudinal arrangement, or described voltage signal line is arranged askew, or the rounded distribution of described voltage signal line.

4. a driving method for touch display screen, is characterized in that, is applied to the touch display screen described in any one of claim 1-3, and described method comprises:

Obtain touch objects current touch location;

To the conductive layer on-load voltage being in described current touch location place, described voltage generation current in the touch objects of the described touch display screen of contact of loading, thus produce electric touch.

5. driving method according to claim 4, is characterized in that, described conductive layer comprises multiple touch area or described conductive layer comprises some voltage signal lines,

Accordingly, described to the conductive layer on-load voltage being in described current touch location place, specifically comprise:

Continue on-load voltage to the touch area be on described current touch location or voltage signal line, or with certain period distances load pulses voltage, or in Preset Time on-load voltage.

6. driving method according to claim 4, is characterized in that, also comprises;

When touch objects leaves described touch display screen, load initial voltage on voltage signal line.

7. the driving method according to claim 4-6 any one, is characterized in that, described conductive layer comprises some voltage signal lines, described to the voltage signal line on-load voltage be on described current touch location, comprising:

To being on described current touch location, any two adjacent voltage signal lines load different voltage, wherein, to the first voltage that a voltage signal line in described any two adjacent voltage signal lines loads, simultaneously to the reverse voltage voltage signal line be adjacent loading described first voltage.

8. driving method according to claim 7, is characterized in that, being carried in the difference of the voltage on any two neighboring voltage signals lines minimum is 0.6V.