JP6923604B2 - Image display device - Google Patents

Description

The present invention relates to an image display device, and more particularly to an image display device having a full flat structure provided with a touch switch.

In recent years, in an image display device, an image display device having a full flat structure in which a display screen and a frame are integrated is known. The image display device with a full flat structure is superior in design because the display screen and the frame have a sense of unity as compared with the conventional image display device, and the frame part is not conspicuous due to the sense of unity. , Gives the viewer the impression that the image display devices are smoothly connected when the image display devices are arranged vertically and horizontally. Therefore, an image display device having a full flat structure is being sought after in the market.

When trying to realize a touch panel with an image display device having a full flat structure, as a touch detection method on glass, for example, an operation is performed based on a change in capacitance that occurs when a fingertip or the like approaches a known glass. Capacitive touch panels are preferred (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-106308

Further, with the recent tendency of image display devices to have a large screen, an image display device having a full flat structure is also required to have a large screen. In the case of a large-screen image display device, the glass on the entire surface of the display screen may be very thick in order to secure the strength. For example, in the case of an 80-inch display, a thickness of 3 mm or more is required.

Therefore, if a mechanical operation button is to be provided on the frame of a large-screen full-flat image display device, it is necessary to make a hole in a large thick glass, which is not easy to process and costly. There is a problem that it becomes expensive.

On the other hand, it is conceivable to provide a capacitance type touch switch on the frame instead of a mechanical operation button, but in that case, the area of the capacitance detection sheet to detect the change in capacitance is extended to the frame part. Need to spread.

However, since the capacitance detection sheet is usually made according to the size of the display screen, it cannot be applied to a switch such as a power supply located in a frame portion outside the display screen. In addition, when a capacitance detection sheet that is slightly larger than the display screen is used, the frame portion expands beyond the portion where switches such as the power supply are arranged, which impairs the design and allows multiple image display devices to be placed vertically and horizontally. This becomes a problem when combining them to form a multi-screen. Further, if an order for a capacitance detection sheet that does not correspond to the size of the display screen is ordered, there is a problem that the cost burden increases.

It is also conceivable to configure a touch panel and a touch switch by connecting a plurality of small area capacitance detection sheets, but in this case, not only the small area capacitance detection sheet but also the capacitance detection. Since the number of extra members such as cable wiring connecting the sheets increases, there is a problem that not only the cost burden increases but also the assembling property deteriorates.

The present invention has been made in consideration of the above circumstances, and an object thereof is an image of a full flat structure equipped with a capacitive touch switch which is inexpensive and easy to assemble. The purpose is to provide a display device.

The present invention is an image display device including a capacitance type touch switch that detects and switches the finger based on a change in capacitance that occurs when a finger approaches the panel. Includes the panel, a substrate on which an electrode for detecting capacitance is mounted, and a conductive member corresponding to the electrode, and the conductive member is provided between the panel and the electrode. Provided is an image display device characterized in that it is sandwiched and fixed between a panel and the electrodes.

According to the present invention, it is possible to realize an image display device having a full flat structure equipped with a capacitive touch switch, which is easy to assemble and inexpensive. Further, even if the electrode component is not separately provided, it is sufficient to form the electrode on the substrate on which the control circuit is mounted by using a conductive member thicker than the component mounted on the substrate.

It is a block diagram which shows the schematic structure of the image display device of this invention. It is a front view of the image display device of this invention. It is a left side view of the display part and the operation part shown in FIG. It is an enlarged view of X part of the operation part shown in FIG. FIG. 4 is a cross-sectional view taken along the line AA'of the operation unit shown in FIG. It is a flowchart which shows the detection procedure of the capacitance of the touch switch of the image display device of this invention. It is explanatory drawing which shows an example of the detection value of the capacitance of the electrode of the conventional touch switch 25. It is explanatory drawing which shows the mechanism which the erroneous operation occurs by the coupling of the capacitance in the capacitance type touch panel using the large glass. It is a graph which shows the Example of the detection value of the capacitance of the electrode of the touch switch of this invention. It is explanatory drawing which shows the reason why the coupling of capacitance with the electrode adjacent to the touch switch of this invention is reduced. It is a perspective view of the conductive member of the touch switch which concerns on Embodiment 2. FIG. It is explanatory drawing which shows an example of installation of the conductive member shown in FIG. 11 to a touch switch. It is explanatory drawing which shows the structure of the conventional touch switch 25. It is explanatory drawing which shows the structure of the touch switch which concerns on Embodiment 3. It is explanatory drawing which shows the problem at the time of providing the GND pattern in a touch switch. It is explanatory drawing which shows the structure of the touch switch which concerns on Embodiment 4.

Hereinafter, the present invention will be described in more detail with reference to the drawings. It should be noted that the following description is exemplary in all respects and should not be construed as limiting the invention.

(Embodiment 1)
<Configuration of image display device 100>
Hereinafter, the configuration of the image display device 100 provided with the touch switch 25 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a block diagram showing a schematic configuration of the image display device 100 of the present invention. FIG. 2 is a front view of the image display device 100 of the present invention. FIG. 3 is a left side view of the display unit 101 and the operation unit 102 shown in FIG. FIG. 4 is an enlarged view of the X portion of the operation unit 102 shown in FIG.

The image display device 100 is a device that displays an image / video such as a moving image, a still image, or a 3D image, and is operated by touching a touch panel on the screen with a fingertip or the like and a touch panel by touching the operation panel with the fingertip or the like. It is equipped with a touch switch for turning the power on and off and displaying the menu screen.
Examples of the image display device 100 include displays such as televisions, personal computers (PCs), public displays, monitors, and electronic whiteboards.
Further, the image display device 100 is not limited to the stationary image display device, and may be a portable image display device such as a smartphone or a tablet terminal.

As shown in FIG. 1, the image display device 100 of the present invention mainly includes a microcomputer 10, a signal detection unit 11, a scaler 12, an image memory 13, an image display unit 14, a non-volatile memory 15, a volatile memory 16, and a back. It includes a light 17, a power supply unit 18, a DC-DC converter 19, a timer 20, a light receiving unit 21, a communication unit 22, an input terminal unit 23, an indicator lamp 24, and a touch switch 25.

Hereinafter, each component shown in FIG. 1 will be described.
The microcomputer 10 is a circuit mainly composed of a microprocessor, and is an arithmetic unit that performs control processing of various devices and processing of an operating system, application software, and the like. Further, the peripheral circuit may include an ASIC (Application Specific Integrated Circuit), which is an integrated circuit designed and manufactured for a specific application, and a circuit having other arithmetic functions.

The signal detection unit 11 is a part that detects an input signal input from an external device (not shown) through the input terminals 231 to 234.
The types of input signals are related to, for example, analog input terminals such as VGA terminals and component terminals, digital input elements such as DVI terminals, HDMI (registered trademark) terminals and DisplayPort terminals, and control system input terminals such as USB connectors. The input signal can be given.
Further, the detection of the input signal by wire is not limited to the detection of the input signal by wireless such as Bluetooth (registered trademark) or wireless LAN.

The scaler 12 is a part that processes image data. For example, processing such as image correction, color correction, gamma correction, double speed processing, OSD generation, and OSD superimposition is performed.

The image memory 13 is a portion that stores image data processed by the scaler 12. For example, it is used for FRC (Frame Rate Conversion) and the like.

The image display unit 14 is a portion that displays various information such as an input image and a setting screen 140.

Further, the image display unit 14 can operate the touch panel by detecting the position of the user's fingertip or the like in contact with the display surface by covering the display surface with the touch panel. As the position detection method of the touch panel, a capacitance method that detects a change in capacitance that occurs when a finger approaches the panel is used.
As the display panel of the image display unit 14, the glass 26 common to the touch switch 25 is used (see FIG. 3).

The non-volatile memory 15 is a part that stores information necessary for realizing various functions of the image display device 100, such as a control program, log information, user setting information, and fixed text for system information. As the non-volatile memory 15, for example, a storage medium such as a flash memory or EEPROM is used.

The volatile memory 16 is a portion that temporarily stores various data and transaction results. The volatile memory 16 is also used as a work area for a program or the like. As the volatile memory 16, for example, a semiconductor element such as SRAM or a storage medium such as a hard disk is used.

The backlight 17 is a portion that illuminates the liquid crystal display from the back surface of the image display unit 14. As the light source of the backlight 17, for example, an LED or a cold cathode fluorescent lamp (CCFL) is used. Further, a direct type method, an edge light method and other methods are used.

The power supply unit 18 is a portion that converts an external AC power source into a direct current and supplies power to each part of the image display device 100. As the power supply unit 18, for example, an AT power supply, an ATX power supply, an SFX power supply, or the like is used.

The DC-DC converter 19 is a portion that steps down or boosts the direct current input from the power supply unit 18 to supply necessary power to each portion of the image display device 100.

The timer 20 is a part that measures the elapsed time of various processes of the image display device 100.

The light receiving unit 21 is a portion that receives an infrared (IR) signal from the remote controller, and receives a command from the user through receiving the infrared signal from the remote controller.

The communication unit 22 is a part that communicates with an external device by wire or wirelessly via a network and transmits / receives data. As the network, a wide area network (WAN) such as LAN and the Internet, a dedicated communication line, and the like are used.
Examples of the wireless communication standard include Bluetooth (registered trademark), IEEE802.11a, IEEE802.11b, IEEE802.11g, and IEEE802.11n, which are wireless LAN standards.
Examples of the external device to be communicated include a PC, a mobile terminal, a server, and the like capable of wired or wireless communication, and also include a legacy interface such as RS-232C.

The input terminal unit 23 is a portion for connecting terminals of an external device and inputting a signal.
The input terminal unit 23 shown in FIG. 1 has four input terminals 231 to 234 that can be connected to terminals of an external device, but this is an example and may have an arbitrary number of input terminals.
Examples of terminals that can be connected to the input terminal unit 23 include analog input terminals such as VGA terminals and component terminals, digital input elements such as DVI terminals, HDMI terminals and DisplayPort terminals, and control system input terminals such as USB connectors. can give.
Examples of the external device include those capable of outputting a moving image or still image signal, such as a PC, a mobile terminal, a recorder, and a video camera.

The indicator lamp 24 is a lamp that displays the power supply status of the image display device 100 by means of an LED or the like. For example, when the power of the image display device 100 is turned off, a red LED is displayed, and when the power is on, a green LED is displayed.

The touch switch 25 is a portion that uses a capacitive touch switch and receives a power on / off operation, a menu screen display operation, and the like.
The touch switch 25 accepts an operation when the electrode 30 detects that the capacitance generated when touched with a fingertip or the like is equal to or higher than a predetermined threshold value.

As shown in FIG. 2, the image display device 100 is roughly divided into three parts, a display unit 101, an operation unit 102, and a support unit 103, and the operation unit 102 is provided with a touch switch 25.

Hereinafter, the side of the image display device 100 viewed from the front is referred to as the front (or front), and the back side is referred to as the rear (or rear).

As shown in FIG. 3, the display unit 101 and the operation unit 102 share the glass 26 as a common panel.

In the display unit 101, the capacitance detection sheet 141, the image display unit 14, and the substrate 32 are provided in this order on the back surface of the glass 26.
Further, in the operation unit 102, the conductive member 29, the electrode 30, and the substrate 31 are provided in this order on the back surface of the glass 26.
The number of substrates 31 is not limited to one, and a plurality of substrates may be mounted.

In this way, while sharing the glass 26, the substrate 32 of the display unit 101 and the substrate 31 of the operation unit 102 are provided separately, so that maintenance such as replacement of the touch switch 25 becomes easy.

As shown in FIG. 4, the operation unit 102 includes a light receiving unit 21, an indicator lamp 24, and a touch switch 25. By touching a predetermined portion of the glass surface of the touch switch 25 with a fingertip or the like, the user performs an operation such as turning on / off the power or displaying a menu screen.

The "board" of the present invention is realized by the board 31. Further, the "panel" of the present invention is realized by the glass 26.

<Configuration of touch switch 25 and its operation>
Next, the configuration and operation of the touch switch 25 of the present invention will be described with reference to FIGS. 5 to 10.
FIG. 5 is a cross-sectional view taken along the line AA'of the operation unit 102 shown in FIG. FIG. 6 is a flowchart showing a procedure for detecting the capacitance of the touch switch 25 of the image display device 100 of the present invention. FIG. 7 is an explanatory diagram showing an example of the detected value of the capacitance of the electrode 30 of the conventional touch switch 25. FIG. 9 is a graph showing an example of a detected value of the capacitance of the electrode 30 of the touch switch 25 of the present invention. FIG. 10 is an explanatory diagram showing the reason why the coupling of capacitance with the electrode 30 adjacent to the touch switch 25 of the present invention is reduced.

As shown in FIG. 5, the touch switch 25 of the present invention includes an operation panel portion 251, an electrode portion 252, and a substrate 31.

The operation panel portion 251 is provided in the order of AG (Anti-Glare, antireflection) film 27, glass 26, and ink 28 from the front side. Black ink or the like is used as the ink 28, and the ink 28 is applied to the back surface of the glass 26.
Here, the AG film 27 is 0.1 mm thick, the glass 26 is 3.2 mm thick, and the ink 28 is 20 μm thick.

Further, the substrate 31 includes electrodes 30A and 30B, and conductive members 29A and 29B are provided on the electrodes 30A and 30B, respectively. The thickness of the conductive members 29A and 29B after being incorporated in the touch switch 25 in the front-rear direction is about 3 mm.

In FIG. 6, when the electrode 30 detects a change in capacitance in step S1 after executing the start-up process of the microcomputer 10, the microcomputer 10 detects the capacitance in the following step S2. Is larger than a predetermined threshold value (step S2).

When the detected value of the capacitance is larger than the predetermined threshold value (when the determination in step S2 is Yes), the microcomputer 10 performs processing according to the detection result (step S3). After that, the microcomputer 10 repeats the process of step S1 (step S1).

On the other hand, when the detected value of the capacitance is equal to or less than a predetermined threshold value (when the determination in step S2 is No), the microcomputer 10 repeats the process of step S1 (step S1).

7 (A) and 7 (B) are an example of a graph showing the time change of the detected value of the capacitance detected by the two adjacent electrodes 30A and 30B in the conventional touch switch 25, respectively.
Here, the horizontal axis of FIGS. 7A and 7B shows time, and the vertical axis shows the magnitude (arbitrary unit) of the detected value of the capacitance detected by the electrode 30.

As shown in FIGS. 7A and 7B, in the conventional touch switch 25, when the user's finger touches the touch switch 25, the corresponding electrode 30A not only detects the change in capacitance but also detects the change in capacitance. The electrode 30B located next to the electrode 30B may also detect a change in capacitance due to the coupling of capacitance with the fingertip. Such a tendency is particularly remarkable in the case of thick large glass, and often causes erroneous operation.

When the electrostatic switch is mounted using the thick glass 26, as shown in FIG. 8A, when the user presses the glass surface of the touch switch 25 with a finger, the electrode corresponding to the glass surface is used. In addition to 30A, capacitance coupling may occur with the adjacent electrode 30B.

Further, as shown in FIG. 8B, in the thick glass 26, the capacitance may be coupled between the adjacent electrodes 30A and 30B, and the sensitivity of the sensor may be deteriorated.
Therefore, when the thick glass 26 is used for the touch switch 25, an erroneous operation not intended by the user often occurs.

Therefore, conventionally, in order to prevent erroneous operation due to such coupling of capacitance with the adjacent electrode 30B and to correctly determine that the electrode 30A has been selected by the user, it is often necessary to change the capacitance. There is a problem that complicated analysis is required and power is consumed more than necessary.

On the other hand, FIG. 9 shows the result of measuring the change in capacitance using the touch switch 25 of the present invention.
9 (A) and 9 (B) are examples of graphs showing the time change of the detected value of the capacitance detected by the two adjacent electrodes 30 in the touch switch 25 of the present invention.
Here, the horizontal axis of FIGS. 9A and 9B indicates time, and the vertical axis indicates the magnitude (arbitrary unit) of the detected value of capacitance.

In FIG. 9, the user makes the finger touch only one of the glass surfaces of the touch switch 25 corresponding to the electrode 30A or the electrode 30B in the period 1, and the touch switch 25 corresponding to the electrode 30A and the electrode 30B in the period 2. I made sure that my fingers touched both sides of the glass surface.

As shown in FIGS. 9A and 9B, when the user's finger touches the glass surface of the touch switch 25 corresponding to the electrode 30A in the period 1 and the electrode 30A detects a change in capacitance, the electrode 30A is adjacent to the glass surface. Electrode 30B did not detect a change in capacitance.
On the other hand, when the user's finger touches the glass surface of the touch switch 25 corresponding to the electrode 30B and the electrode 30B detects the change in capacitance, the adjacent electrode 30A does not detect the change in capacitance.

Further, in the period 2, when the user's finger touches the glass surface of the touch switch 25 corresponding to the electrode 30A and the electrode 30B, both the electrode 30A and the electrode 30B detect a change in capacitance.

The reason for this improvement is that, as shown in FIG. 10, a linear path connecting the finger touching the glass surface of the touch switch 25 corresponding to the electrode 30A and the adjacent electrode 30B. Since RT1 is blocked by the air gap between the two electrodes 30A and 30B, the finger and electrode 30B must be coupled through the longer path RT2, resulting in reduced capacitance coupling strength. It is thought that this is because of this.

Further, unlike the case where the conductive members 29A and 29B are directly coupled to the planar electrodes 30A and 30B, the conductive members 29A and 29B have a three-dimensional structure having a thickness in the front-rear direction. Here, considering that the relative permittivity of air is about 1.00058 and the relative permittivity of glass is about 3.5 to 9.9, the contribution of capacitance from the side surface of the conductive member 29B also contributes. It cannot be completely ignored, and it is considered that the contribution of the capacitance coupling that directly connects the finger and the upper surface of the conductive member 29B may be reduced accordingly.

(Embodiment 2)
Next, the touch switch 25 of the image display device 100 according to the second embodiment of the present invention will be described with reference to FIGS. 11 and 12.
FIG. 11 is a perspective view of the conductive member 29 of the touch switch 25 according to the second embodiment. FIG. 12 is an explanatory view showing an example of installation of the conductive member 29 shown in FIG. 11 on the touch switch 25.

As shown in FIG. 11, the conductive member 29 includes an internal elastic member 291 and a conductive sheet 292 provided on the peripheral surface of the elastic member 291.

As shown in FIG. 12A, when the conductive member 29 is installed on the electrode 30 and then the operation panel portion 251 is pushed toward the substrate 31, the conductive member 29 becomes the substrate 31 and the operation panel portion 251. Deforms under pressure from.
At this time, as shown in FIG. 12B, the conductive member 29 contracts in the direction of the arrow DA and also extends in the direction of the arrows RA and LA.

However, the conductive member 29 does not extend in the direction of the surface on which the conductive sheet 292 is not wound.
This is because the conductive sheet 292 is not elastic or has low elasticity. Therefore, by attaching such a conductive sheet 292 on a specific surface of the elastic member 291, the elasticity of the elastic member 291 can be increased. This is because it can be controlled.

For example, as shown in FIG. 11, when the conductive sheet 292 is wound around the elastic member 291, the deformation of the conductive member 29 extending in the x direction is prevented. This is because the length Lx of the conductive sheet 292 in the x direction is kept constant.

On the other hand, with respect to the deformation of the conductive member 29 in the y direction, the conductive member 29 is allowed to be deformed so as to extend in the y direction, provided that the circumferential length 2Ly + 2Lz of the conductive sheet 292 is constant.

In this way, it is possible to realize the conductive member 29 that extends only in a predetermined direction when pressure is received from the substrate 31 and the operation panel portion 251.

(Embodiment 3)
Next, the touch switch 25 of the image display device 100 according to the second embodiment of the present invention will be described with reference to FIGS. 13 and 14.
FIG. 13 is an explanatory diagram showing the structure of the conventional touch switch 25. FIG. 14 is an explanatory diagram showing the structure of the touch switch 25 according to the third embodiment.

When the light receiving unit 21 and the indicator lamp 24 are provided on the conventional touch switch 25, these elements cannot be directly adhered to the glass 26. Therefore, as shown in FIG. 13, the substrate 31 for the electrode 30 and the control substrate It had a two-part configuration of 37.

In FIG. 13, the substrate 31 provided with the electrodes 30A and 30B is adhered to the glass 26 by the adhesive layer 33 and is bonded to the control substrate 37 through the cable wiring 34.
The control board 37 is provided with a light receiving unit 21 and an indicator light 24 on the front surface facing the glass 26, and is provided with a connector 35 and a control device 36 on the rear surface.

However, such a configuration has a problem that the cable wiring 34 is susceptible to noise and the cost is high.

Therefore, in order to solve such a problem, as shown in FIG. 14, the light receiving portion 21 and the indicator lamp 24 are provided in the gap created by the conductive member 29 sandwiched between the glass 26 and the substrate 31.

By doing so, not only is it possible to secure a space for arranging the light receiving unit 21 and the indicator lamp 24, but also it is not necessary to provide an unstable cable wiring 34 between the board 31 and the control board 37. Therefore, the touch switch 25 The sensitivity of is very high.

(Embodiment 4)
Next, the arrangement of the GND pattern 38 of the touch switch 25 of the image display device 100 according to the third embodiment of the present invention will be described with reference to FIGS. 15 and 16.
FIG. 15 is an explanatory diagram showing a problem when the GND pattern 38 is provided in the touch switch 25. FIG. 16 is an explanatory diagram showing the structure of the touch switch 25 according to the fourth embodiment.

As shown in FIG. 15A, a GND pattern 38 may be provided on the substrate 31 in order to prevent the influence of noise due to electrostatic coupling with the adjacent electrode.

However, as shown in FIG. 15B, when the GND pattern 38 is provided in the vicinity of the conductive member 29, the conductive member 29 has the electrode 30 and the GND pattern due to a work error during the installation of the conductive member 29 or the like. If it comes into contact with 38 and short-circuits, the sensitivity of the touch switch 25 may decrease or it may not operate normally.

Therefore, in order to prevent such a problem, the GND pattern 38 is provided on the rear surface side of the substrate 31 as shown in FIG. 16 (A). From the viewpoint of electric lines of force, even if the position of the GND pattern 38 comes to the rear surface side of the substrate 31, the physical influence is small.

Further, by arranging the GND pattern 38 in this way, as shown in FIG. 16B, even if the arrangement of the conductive member 29 is laterally displaced due to a work error or the like, the contact with the GND pattern 38 is caused. It is possible to avoid problems caused by short circuits.

(Other embodiments)
1. 1. In the first to fourth embodiments, the conductive member 29 is not limited to a rectangular parallelepiped shape, and may be, for example, a cylindrical shape, a semi-cylindrical shape, or a combination thereof. (Embodiment 5)

In this way, it is possible to provide the optimum conductive member 29 according to the area and shape of the electrode 30.

2. In the first to fifth embodiments, the conductive member 29 may use an elastic body such as rubber or resin, or the elastic body itself may have conductivity. (Embodiment 6)

In this way, it is possible to provide the optimum conductive member 29 according to the structure of the touch switch 25.

As mentioned above
(I) The image display device of the present invention is an image display device provided with a capacitance type touch switch that detects and switches the finger based on a change in capacitance that occurs when a finger approaches the panel. The touch switch includes the panel, a substrate on which an electrode for detecting capacitance is mounted, and a conductive member corresponding to the electrode, and the conductive member includes the panel and the electrode. It is characterized in that it is provided between the panels and is sandwiched and fixed between the panel and the electrodes.

In the present invention, the "image display device" is a device that displays an image / video such as a moving image, a still image, or a 3D image, and has a touch panel that is operated by touching the screen with a fingertip or the like and an operation panel that is operated by the fingertip or the like. It is equipped with a touch switch that turns the power on and off and displays the menu screen by touching with.
Examples of the image display device include displays such as televisions, personal computers (PCs), public displays, monitors, and electronic whiteboards.
Further, the present invention is not limited to the stationary image display device, and may be a portable image display device such as a smartphone or a tablet terminal.

"When a finger approaches the panel" is not limited to the finger, but may be a pen tip or the like.

Further, preferred embodiments of the present invention will be described.
(Ii) In the image display device according to the present invention, the capacitance detection sheet is further provided, the panel has a larger area than the capacitance detection sheet, and is other than the area of the capacitance detection sheet of the panel. The touch switch may be arranged in the area of.

By doing so, a part of the panel can be effectively used by configuring the touch switch by using a part of the panel as a panel for the touch switch, and in the panel for the touch switch, the capacitance detection sheet can be used. Is not required, so a significant cost reduction is possible. In addition, the assembly work of the image display device with a touch switch becomes easy.

(Iii) In the image display device according to the present invention, the substrate mounts two or more of the electrodes, and the conductive member is spaced from the other conductive member at a predetermined distance from the panel and the electrodes. It may be provided between.

In this way, since the conductive member is provided between the panel and the electrode at a predetermined distance from the other conductive member, the coupling strength of the capacitance between the electrodes is increased. It is possible to realize an image display device equipped with a touch switch that can be reduced and inexpensively prevent the occurrence of unintended erroneous operations due to the coupling of capacitances in the panel with a simple structure.

(Iv) In the image display device according to the present invention, when the conductive member is provided between the panel and the electrode, the conductive member is deformed in a predetermined direction by receiving pressure from the panel and the electrode. You may.

In this way, by using a conductive member that deforms in a specific direction when pressure is received from the panel and electrodes, when the conductive member is incorporated between the panel and the substrate, the deformation of the conductive member causes the said. It is possible to prevent the conductive member from unintentionally coming into contact with other electrodes, elements, or the like.

(V) In the image display device according to the present invention, the substrate mounts two or more electrodes, and when one of the conductive members receives pressure from the panel and the electrodes, the one conductive member is deformed in a direction of deformation. The one conductive member may be oriented and arranged on the substrate so that the other conductive member is not positioned.

In this way, when the conductive member is incorporated between the panel and the electrode, the conductive member is oriented and arranged so that the other conductive member is not positioned in the direction in which the conductive member is deformed. It is possible to prevent the member from being deformed and coming into contact with other conductive members in advance.

(Vi) In the image display device according to the present invention, the conductive member is formed by winding a conductive sheet on a predetermined surface of an elastic body having a rectangular parallelepiped, a cylindrical shape, a semi-cylindrical shape, or a combination thereof. The elastic body may contain at least one of urethane foam, rubber or resin, and may be fixed between the panel and the electrode when pressure is applied from the panel and the electrode.

By doing so, it is possible to easily realize a conductive member that deforms in a specific direction simply by winding a conductive sheet around the elastic body.

(Vii) In the image display device according to the present invention, a ground pattern for preventing noise from the outside to the electrodes may be provided on the surface of the substrate opposite to the surface on which the electrodes are provided.

By doing so, by providing the ground pattern on the substrate on the opposite side of the electrode, even if the conductive member is displaced from the electrode due to a work mistake or the like, it does not come into contact with the ground pattern for guarding and cause a short circuit. ..

(Viii) In the image display device according to the present invention, the conductive member is provided so as to generate a gap having a predetermined size between the panel and the substrate when the conductive member is provided between the panel and the electrode. The element may be provided on the substrate having the gap.

By doing so, by arranging the indicator LED and the IR light receiving part in the gap between the panel and the corresponding board, it is not necessary to separate the sensor board and the control board, so that unstable cable wiring can be eliminated. As a result, the sensitivity is increased and the sensor sheet is not required, so that the cost of the mold and the mouse can be reduced.

Preferred embodiments of the present invention also include a combination of any of the plurality of embodiments described above.
In addition to the embodiments described above, there may be various variations of the present invention. These variations should not be construed as not belonging to the scope of the present invention. The present invention should include the meaning equivalent to the claims and all modifications within the said scope.

10: Microcomputer, 11: Signal detector, 12: Scaler, 13: Image memory, 14: Image display unit, 15: Non-volatile memory, 16: Volatile memory,
17: Backlight, 18: Power supply unit, 19: DC-DC converter,
20: Timer, 21: Light receiving part, 22: Communication part, 23: Input terminal part, 24: Indicator light, 25: Touch switch, 26: Glass, 27: AG film, 28: Ink, 29, 29A, 29B: Conductive Members, 30, 30A, 30B: Electrodes, 31, 32: Substrate, 33: Adhesive layer, 34: Cable wiring, 35: Connector, 36: Control device, 37: Control board, 38: GND pattern, 100: Image display device , 101: Display unit, 102: Operation unit, 103: Support unit, 140: Setting screen, 141: Capacitance detection sheet, 231,232,233,234: Input terminal, 251: Operation panel unit, 252: Electrode Part, 291: Elastic member, 292: Conductive sheet, DA, LA, RA: Arrow, RT1, RT2: Path

Claims (6)

A panel, a capacitance detection sheet that detects a change in capacitance that occurs when a finger approaches the panel, and a capacitance type that detects and switches the finger based on the change in capacitance. An image display device with a full flat structure equipped with a touch switch.
The panel consists of a piece of glass
The single glass is commonly used as an image display area corresponding to the capacitance detection sheet and an operation area including the touch switch.
An image display device, characterized in that the substrate of the display region and the substrate of the operation region have a structure provided in parallel in different regions of the glass. The substrate in the operation area is mounted with electrodes for detecting capacitance.
The image display area is formed by sequentially providing the capacitance detection sheet and the image display panel on the back surface of the glass.
The image display device according to claim 1, wherein the operation region is provided with a conductive member corresponding to the electrode, the electrode, and a substrate of the operation region in this order on the back surface of the glass. The image display device according to claim 1 or 2, wherein the operation of the touch switch includes at least one operation of a power on / off operation and a menu screen display operation. The image display device according to claim 2, wherein the touch switch is configured by sandwiching the conductive member between the glass and a substrate of the operation region. Two or more electrodes are mounted on the substrate in the operation area.
When a finger touches the glass corresponding to one electrode, the two or more electrodes have a linear path of air connecting the finger and another electrode located next to the one electrode. The image display device according to any one of claims 1 to 4, which is arranged on a substrate of the operation area with a predetermined interval and thickness so as to be blocked by a gap. The image display device according to claim 2 or 5, wherein a ground pattern for preventing noise from the outside to the electrodes is provided on a surface of the substrate of the operation region opposite to the surface on which the electrodes are provided.

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