TWM649098U - Touch display device - Google Patents

Abstract

A touch display device includes a touch panel, a display panel and an electromagnetic resonance panel, wherein the display panel is arranged between the touch panel and the electromagnetic resonance panel, and the electromagnetic resonance panel is controlled by an electromagnetic touch pen.

Description

touch display device

The invention relates to a touch display device, and in particular to a dual-purpose touch display device.

When the existing touch display panel is used outdoors and encounters rain or water, the touch function will fail when water remains on the touch display panel.

This creation relates to a touch display device that can be controlled using fingers, capacitive stylus or electromagnetic stylus.

According to one aspect of this invention, a touch display device is proposed, including a touch panel, a display panel and an electromagnetic induction panel, wherein the display panel is disposed between the touch panel and the electromagnetic induction panel, and the electromagnetic induction panel is Electromagnetic stylus control.

In order to have a better understanding of the above and other aspects of this invention, examples are given below, and detailed descriptions are as follows with the accompanying drawings:

Please refer to Figures 1 and 2, which respectively illustrate an assembly diagram and an exploded schematic diagram of the touch display device 100 according to an embodiment of the present invention. The touch display device 100 includes a touch panel 110, a display panel 120 and an electromagnetic induction panel 140. The display panel 120 is disposed between the touch panel 110 and the electromagnetic induction panel 140, and the electromagnetic induction panel 140 uses an electromagnetic method. Stylus 150 control.

The touch panel 110 is disposed on the display panel 120. The touch panel 110 and the display panel 120 can be integrated into one, such as an in-cell touch display panel 120 or other touch display panels 120. . However, the touch panel 110 and the display panel 120 can also be independent structures.

The electromagnetic induction board 140 is disposed on the back of the display panel 120. The electromagnetic induction board 140 includes a flexible circuit board 141 for transmitting sensing signals. The electromagnetic induction panel 140, the touch panel 110 and the display panel 120 can be independent structures, but can also be integrated into one through other methods, which is not limited by this invention. In one embodiment, the electromagnetic induction plate 140 is disposed in the backlight module 130 or on the back of the display panel 120 . That is to say, the electromagnetic induction plate 140 is disposed between the light guide sheet 131 and the bottom plate 133 of the backlight module 130 . . The light guide sheet 131 of the backlight module 130 is disposed between the display panel 120 and the electromagnetic induction plate 140. The bottom plate 133 is, for example, a metal shell or a plastic shell, which is used to fix the electromagnetic induction plate 140 on the bottom plate 133 so that the backlight module 130 and The electromagnetic induction plate 140 is integrated into one body. However, in the absence of the backlight module 130 , the electromagnetic induction plate 140 can also be directly disposed on the back of the display panel 120 or in the display panel 120 , which is not limited by this invention.

The display panel 120 is used to receive the image signal M and control a plurality of internal pixel units to present the image. In one embodiment, the display panel 120 is a backlit liquid crystal display or a reflective display. The backlit liquid crystal display may include a liquid crystal panel (or other types of panels) and a backlight module 130. The backlight module 130 provides the The lighting required to display the image. The LCD panel includes a color filter, a transistor array substrate, and a liquid crystal layer. The transistor array substrate can form an electric field according to a control voltage to adjust the rotation angle of the liquid crystal molecules in the liquid crystal layer, thereby presenting different grayscale images. The color filters are arranged in a specific manner so that the grayscale image displayed on the liquid crystal layer can pass through the color filters to form a color image.

Reflective displays, such as electronic paper, display images through external light sources and do not require a backlight module 130 . Electronic paper includes a transistor array substrate and an electronic ink layer. A transistor array substrate (such as a thin film transistor array substrate) can form an electric field according to a control voltage to adjust the positions of multiple electrophoretic particles in the electronic ink layer, thereby displaying different grayscale colors, and the grayscale image displayed by the electronic ink layer is also Color images can be formed through color filters. However, the present disclosure is not limited thereto. The touch display device 100 of the present invention can also be applied to other types of displays, such as a flexible touch display panel 120 or an organic light emitting diode display panel 120 .

The touch panel 110 can detect the touch position based on a touch event. The touch panel 110 is electrically connected to the display panel 120 and is used to receive touch signals. In one embodiment, the touch panel 110 is, for example, a capacitive touch device. The touch panel 110 is provided with a plurality of touch electrodes for detecting changes in impedance or capacitance (i.e., touch signals) to determine whether a touch signal occurs. A touch event (for example, when the user's finger or stylus touches or approaches the display panel 120).

Please refer to FIG. 3 , which illustrates an operation block diagram of the touch display device 100 according to an embodiment of the present invention. Specifically, the operating system 101 of the touch display device 100 may include a processor 132 . The processor 132 is electrically connected to the display panel 120 and the touch panel 110, and is used to transmit the image signal M to the display panel 120. The processor 132 is also used to transmit a plurality of scanning signals to a plurality of first touch electrodes in the touch panel 120 and to receive a sensing signal S1 from a plurality of second touch electrodes in the touch panel 120 . When a foreign object contacts or approaches the touch display device 100 , the mutual capacitance value (Mutual Capacitance) between the first touch electrode and the second touch electrode will change, and the magnitude of the sensing signal S1 will reflect these changes. Changes in mutual capacitance values. Therefore, the processor 132 can calculate the coordinate position of the foreign object (the user's finger or the capacitive stylus 160) on the X-axis and Y-axis of the display panel 120 based on the sensing signal S1.

The touch principle of the touch panel 110 in this disclosure is not limited to the above. Since those skilled in the art can understand the structures and principles of the display panel 120 and the touch panel 110, they will not be described in detail here.

In addition, the electromagnetic induction panel 140 is disposed on one side of the display panel 120 and is controlled by electromagnetic induction and is not affected by the touch panel 110 . That is to say, the electromagnetic induction panel 140 and the touch panel 110 are two components with different working principles, and they will not interfere with each other. Therefore, the electromagnetic induction panel 140 and the touch panel 110 can be disposed on opposite sides of the display panel 120 .

The electromagnetic induction panel 140 is controlled by an electromagnetic stylus 150 . The electromagnetic stylus 150 can be a charged or uncharged stylus. The electromagnetic induction board 140 can generate alternating current through the driving circuit and flow through the coils of the electromagnetic induction board 140 . At this time, the respective coils of the electromagnetic induction board 140 and the electromagnetic stylus 150 will work like the primary and secondary of a transformer, generating an AC voltage at both ends of the coil of the electromagnetic stylus 150, which is like electromagnetic touch. The capacitance of the pen 150 coil forming circuit forms a resonance circuit, and electric energy is accumulated through the LC oscillation circuit. When the electromagnetic stylus 150 accumulates sufficient power, the electromagnetic induction plate 140 enters the receiving mode, the coil of the electromagnetic stylus 150 becomes the primary side, and the coil of the electromagnetic induction plate 140 becomes the secondary side. At this time, the energy stored in the electromagnetic stylus 150 will be sent out in the form of electromagnetic signals (RF radio frequency), and the electromagnetic induction plate 140 can receive the electromagnetic signals sent by the electromagnetic stylus 150 above the electromagnetic induction plate 140 . Afterwards, the electromagnetic induction plate 140 can calculate the correct position of the electromagnetic stylus 150 based on the signal strengths received by a plurality of adjacent antenna coils.

Since the electromagnetic induction plate 140 does not need to be disposed on the outer surface of the touch display device 100, it only needs to be disposed below the display panel 120. When it rains or is used outdoors, even if there are residues on the touch display device 100, When exposed to water, the touch function of the touch panel 110 will be disabled, but the touch function of the electromagnetic induction panel 140 will not be disabled. Therefore, the user can still use the electromagnetic stylus 150 to control.

In one embodiment, the electromagnetic induction board 140 is provided with a plurality of induction coils for detecting changes in the magnetic field (i.e., touch signals) to determine whether a touch event occurs (for example, the user uses an electromagnetic stylus 150 when touching or approaching the display panel 120).

Please refer to Figure 3. Specifically, the operating system 101 of the touch display device 100 may include a processor 134. The processor 134 is electrically connected to the display panel 120 and the electromagnetic induction board 140, and is used to transmit the image signal M to the display panel 120. When the electromagnetic stylus 150 contacts or is close to the touch display device 100, the induced magnetic field between the electromagnetic induction plate 140 and the electromagnetic stylus 150 will change, and the magnitude of the sensing signal S2 will reflect these induced magnetic fields. changes (such as inductance). Therefore, the processor 134 can calculate the coordinate position of the electromagnetic stylus 150 on the X-axis and Y-axis of the display panel 120 based on the sensing signal S2.

The above-mentioned processor can be a microcontroller unit, microprocessor or other control circuit, or integrated into a single processor, but this invention is not limited to this. The touch display device 100 of the present invention can be applied to electronic devices capable of handwriting input, such as mobile phones and tablets, and has dual-purpose functions. The user can choose to use fingers or a stylus to input handwritten data. Computers, touch screens, etc. This creation is not limited to this. In addition, the touch display device 100 of the present invention can also be controlled using a stylus 162 (capacitive stylus 160 and electromagnetic stylus 150) with dual functions. The user can choose to use the capacitive stylus 160 or the electromagnetic stylus 150 for operation. Therefore, when it rains or is used outdoors in water, even if water remains on the touch display device 100, the electromagnetic touch function It can still be used normally and is not affected by weather and environment.

In summary, although the present invention has been disclosed as above in the form of embodiments, they are not intended to limit the present invention. Those with ordinary knowledge in the technical field to which this invention belongs can make various modifications and modifications without departing from the spirit and scope of this invention. Therefore, the scope of protection of the present invention shall be determined by the appended patent application scope.

100:Touch display device 101:Operating system 110:Touchpad 120:Display panel 130:Backlight module 131:Light guide sheet 133: Bottom plate 132: Processor 134: Processor 140:Electromagnetic induction board 141:Flexible circuit board 150:Electromagnetic stylus 160: Capacitive stylus 162:Dual-purpose stylus M:Image signal S1: sensing signal S2: Sensing signal

Figure 1 illustrates an assembly diagram of a touch display device according to an embodiment of the invention; and Figure 2 shows an exploded schematic diagram of a touch display device according to an embodiment of the present invention. Figure 3 illustrates an operation block diagram of a touch display device according to an embodiment of the present invention.

100:Touch display device

110:Touchpad

120:Display panel

130:Backlight module

131:Light guide sheet

133: Bottom plate

140:Electromagnetic induction board

141:Flexible circuit board

150:Electromagnetic stylus

Claims (9)

A touch display device, including: a touchpad; a display panel; and An electromagnetic induction panel, wherein the display panel is disposed between the touch panel and the electromagnetic induction panel, and the electromagnetic induction panel is controlled by an electromagnetic stylus. The touch display device as claimed in claim 1, wherein the touch panel is controlled by a user's finger or a capacitive stylus. The touch display device of claim 1, wherein the touch panel and the display panel are integrated into an in-cell touch display panel. The touch display device according to claim 1, wherein the electromagnetic induction plate is disposed on the back of the display panel. The touch display device according to claim 1 or 4 further includes a backlight module, the backlight module is disposed on the back of the display panel, and the electromagnetic induction plate is disposed in the backlight module. The touch display device according to claim 1, wherein the display panel is a liquid crystal panel, an organic light emitting diode display panel or an electronic paper display. The touch display device of claim 1 further includes a processor electrically connected between the display panel and the touch panel, and the processor is used to detect the impedance or capacitance of the touch panel. changes to determine whether a touch event occurs. The touch display device as described in claim 1 further includes a processor electrically connected between the display panel and the electromagnetic induction plate, and the processor is used to detect the electromagnetic induction plate and the electromagnetic induction plate. The induced magnetic field between the stylus pens changes to determine whether a touch event occurs. The touch display device as claimed in claim 1, wherein the touch panel and the electromagnetic induction panel are controlled by a stylus with dual functions, and the stylus with dual functions includes a capacitive stylus and an electromagnetic induction panel. Sex stylus.

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