JP2015060342A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device with a high-function touch panel that can be used for many uses according to use environment.SOLUTION: A display device (10) includes a display part (18) which displays an input video signal; a touch panel (19) as an operation input part which accepts operation input by a user; a communication interface part (11) which transmits and receives data to and from external equipment; and a control part (12) which switches predetermined operation modes set for the display device (10). The communication interface part (11) has a video input terminal which receives the video signal from a terminal device (20) and an operation input information output terminal for outputting operation input information on the touch panel (19) to the terminal device (20), and a control part (12) switches and sets operation modes according to connection states of connection cables to the operation input information output terminal and video input terminal.

Description

  The present invention relates to a display device, and more particularly to a display device that can input an operation on a display screen and functions as a display monitor that can be operated by connecting to an external device.

  Display devices equipped with a liquid crystal panel or the like as a display monitor and equipped with a touch panel as an input device have become widespread. Such a display device is connected to an external information processing device such as a PC (Personal Computer), a smartphone, or a tablet, displays image information input from these information processing devices, and uses a touch panel for the image information. In general, the input method is used for input operation.

  Regarding a display device with a touch panel as described above, for example, Patent Literature 1 discloses a monitoring control device including a dedicated keyboard capable of adapting a key arrangement in accordance with switching of a monitoring control function by a monitoring control device body. A dedicated keyboard having variable key means for selectively displaying different types of key arrangements on a display with a touch panel is connected to the monitoring control apparatus main body. Then, according to the switching of the monitoring control function by the monitoring control device body, the key arrangement as a dedicated keyboard in a mode corresponding to the monitoring control function is displayed on the display with the touch panel, and the monitored control target is displayed on the display with the touch panel as the dedicated keyboard Display information of.

JP 2005-234913 A

  A display device provided with a touch panel is mainly composed of a display monitor such as a liquid crystal panel and a touch panel as an input device, and can perform its function by displaying an image using an external information processing device such as a PC. When there is no external information processing device, basically, the display device cannot be used for other purposes, and a multi-function display device that can be used for various purposes cannot be obtained.

  Further, the invention of the above-mentioned Patent Document 1 is designed to display and operate a keyboard having a different arrangement depending on the monitoring control target, and does not provide a multifunction display device that can be used for various purposes. Absent.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a multi-function display device that can be operated and input and can be used in many applications depending on the use environment. To do.

  In order to solve the above-described problem, a first technical means of the present invention is a data transmission / reception between an external device and a display unit that displays an input video signal, an operation input unit that receives an operation input by a user, and the like. And a communication interface unit that includes a control unit that switches a predetermined operation mode set in the display device, and the communication interface unit receives a video signal from an external device. An input terminal and an operation input information output terminal for outputting operation input information for the operation input unit from the display device to an external device, and the control unit is configured to correspond to the operation input information output terminal and the video input terminal. The operation mode is switched and set according to the connection state of the connection cable.

According to a second technical means, in the first technical means, in the operation mode, operation information for the operation input unit is transmitted to an external device, and a video signal transmitted from the external device is displayed on the display unit. A first mode and a second mode for displaying a video signal transmitted from the external device on a display unit without transmitting operation information for the operation input unit to the external device;
A third mode in which operation information for the operation input unit is transmitted to an external device, and a fourth mode in which predetermined calculation processing is performed in accordance with the operation input to the operation input unit and the calculation processing result is displayed on the display unit Are set to be switchable, and the control unit sets the first mode when the connection cable is connected to both the operation input information output terminal and the video input terminal, and outputs the operation input information. When no connection cable is connected to the terminal and a connection cable is connected to the video input terminal, the second mode is set, a connection cable is connected to the operation input information output terminal, and the video input terminal When the connection cable is not connected to the terminal, the third mode is set, and the connection cable is not connected to both the operation input information output terminal and the video input terminal. If is obtained by and sets the fourth mode.

  According to a third technical means, in the first technical means, in the operation mode, operation information for the operation input unit is transmitted to an external device, and a video signal transmitted from the external device is displayed on the display unit. The first mode, the second mode in which the video signal transmitted from the external device is displayed on the display unit without transmitting the operation information for the operation input unit to the external device, and the operation information for the operation input unit Can be switched between a third mode for transmitting the image to an external device and a fourth mode for performing predetermined calculation processing in accordance with an operation input to the operation input unit and displaying the calculation processing result on the display unit. The control unit has a connection cable connected to both the operation input information output terminal and the video input terminal, and a video signal is input to the video input terminal from an external device. In this case, the first mode is set, a connection cable is not connected to the operation input information output terminal, a connection cable is connected to the video input terminal, and a video signal is input to the video input terminal. If the connection mode is set to the second mode, a connection cable is connected to the operation input information output terminal, and a connection cable is not connected to the video input terminal, the mode is set to the third mode and the operation input is performed. In the case where no connection cable is connected to both the information output terminal and the video input terminal, the fourth mode is set.

  A fourth technical means includes a display unit that displays an input video signal, an operation input unit that receives an operation input by a user, and a communication interface unit that transmits and receives data to and from an external device. A control unit that switches a predetermined operation mode set in the display device, and a tilt detection unit that detects a tilt of the display unit, the control unit detecting a result of the tilt detection unit The operation mode is switched and set according to the above.

  According to a fifth technical means, in the fourth technical means, in the operation mode, operation information for the operation input unit is transmitted to an external device, and a video signal transmitted from the external device is displayed on the display unit. The first mode, the second mode in which the video signal transmitted from the external device is displayed on the display unit without transmitting the operation information for the operation input unit to the external device, and the operation information for the operation input unit Can be switched between a third mode for transmitting the image to an external device and a fourth mode for performing predetermined calculation processing in accordance with an operation input to the operation input unit and displaying the calculation processing result on the display unit. The control unit sets the first to fourth steps in ascending order of the tilt angle of the display unit screen with respect to the horizontal direction, and the tilt is determined based on the detection result of the tilt detection unit. When the angle is in the first stage range, the fourth mode is set. When the tilt angle is in the second stage range, the third mode is set, and the tilt angle is in the third stage. In some cases, the first mode is set, and when the tilt angle is in the fourth stage, the second mode is set.

  A sixth technical means includes a display unit that displays an input video signal, an operation input unit that receives an operation input by a user, and a communication interface unit that transmits and receives data to and from an external device. A control unit that switches a predetermined operation mode set in the display device, wherein the control input unit detects a touch area of a contact object with respect to the display unit, and the touch unit The operation mode is switched and set based on the state of the area.

  A seventh technical means is the sixth technical means, wherein in the operation mode, operation information for the operation input unit is transmitted to an external device, and a video signal transmitted from the external device is displayed on the display unit. The first mode, the second mode in which the video signal transmitted from the external device is displayed on the display unit without transmitting the operation information for the operation input unit to the external device, and the operation information for the operation input unit Can be switched between a third mode for transmitting the image to an external device and a fourth mode for performing predetermined calculation processing in accordance with an operation input to the operation input unit and displaying the calculation processing result on the display unit. When the control unit determines that the touch area matches a predetermined touch shape of the home position of the keyboard, the control unit sets the third mode, and When it is determined that the area matches the predetermined pen holding state, the first mode is set. When it is determined that the area does not match either the home position of the keyboard or the shape holding the pen, the first mode is set. The fourth mode or the second mode is set.

  ADVANTAGE OF THE INVENTION According to this invention, it is a display apparatus in which operation input is possible, Comprising: It can provide providing the highly functional display apparatus with a touchscreen which can be utilized for many uses according to use environment.

It is a block diagram for demonstrating the function structural example of the display apparatus which concerns on this invention. It is a figure explaining the example of control of a display device when performing a touch monitor operation mode. It is a figure explaining the example of control of a display device when performing a display operation mode. It is a figure explaining the example of control of a display device when performing keyboard operation mode. It is a figure explaining the example of control of a display device when performing a calculator operation mode. It is a figure explaining an example of the manual setting of an operation mode. It is a figure explaining the other example of the manual setting of an operation mode. It is a figure for demonstrating 1st Embodiment regarding the automatic setting of an operation mode. 6 is a flowchart for explaining a processing example of the first embodiment related to automatic setting of an operation mode. 10 is a flowchart for explaining a processing example of the second embodiment regarding automatic setting of an operation mode. It is a figure for demonstrating 3rd Embodiment regarding the automatic setting of an operation mode. An example of determining the operation mode based on the installation angle will be described with reference to the flowchart of FIG. It is a figure for demonstrating 4th Embodiment regarding the automatic setting of an operation mode, It is a flowchart for demonstrating the determination process of the operation mode based on a touch state.

  FIG. 1 is a block diagram for explaining a functional configuration example of a display device according to the present invention. The display device 10 can be connected to an external terminal device 20. The terminal device 20 is an information processing device used by a user to input / output data to / from the display device 10 and is a device provided with a user interface for use by the user. For example, a PC (Personal Computer), a smartphone, a tablet, or the like can be applied to the terminal device 20.

  The display device 10 includes a communication interface (I / F) unit, and is connected to the terminal device 20 so that data communication is possible by wire or wireless. Then, a video signal to be displayed is transmitted from the terminal device 20 to the display device 10, and touch position information that is operation information on the touch panel is transmitted from the display device 10 to the terminal device 20. For communication with the terminal device 20 via the communication interface unit 11, interface standards such as HDMI (High-Definition Multimedia Interface) (registered trademark; the same applies hereinafter), DisplayPort, and USB (Universal Serial Bus) are applied. However, it is not limited to these.

The display device 10 further includes a control unit 12, a video signal processing unit 13, a storage unit 14, a timing controller 15, a digital back end (DBE) unit 16, an analog front end (AFE) unit 17, a display unit 18, and a touch panel 19. I have.
The video signal processing unit 13 scales the video signal transmitted from the terminal device 20 according to the specifications of the display unit 18, appropriately performs signal processing for various image quality adjustments, and outputs the signal to the display unit 18.

  The video signal processing unit 13 includes an OSD processing unit 131. The OSD processing unit 131 displays arbitrary characters, symbols, and the like on the display screen of the display unit 18 by OSD (On Screen Display). In general, a menu screen or the like is displayed on the screen by the OSD. In the embodiment according to the present invention, the OSD processing unit 131 can appropriately generate a predetermined keyboard screen, calculator screen, and operation mode switching image and display them on the display unit 18 by the OSD.

  The timing controller 15 drives the display unit 18 based on the video signal output from the video signal processing unit 13 to perform display. When a liquid crystal panel is used for the display unit 18, the timing controller generates a clock signal or the like for distributing video data to pixels on a plane and supplies it to the source driver and gate driver of the liquid crystal panel. The source driver applies an applied voltage to each sub-pixel of the screen through the source line. The gate driver selects one column of the sub-pixels on the screen through the gate line in accordance with a signal from the timing controller so that the source driver can write data to each sub-pixel.

  The display unit 18 is display means using a liquid crystal panel or the like. The video signal processed and output by the video signal processing unit 13 is displayed on the display unit 18 by the timing controller 15. The touch panel 19 corresponds to the operation input unit of the present invention, and detects a touch operation by the user. The touch panel 19 includes a touch panel sensor disposed on the surface of the display unit 18 and a detection circuit related thereto. As the touch panel sensor, a capacitance type sensor that detects a position by detecting a change in capacitance between a fingertip contact object and a conductive film can be applied. In addition to this, a resistive film method that detects voltage as an analog quantity using a resistive film, a surface acoustic wave method (ultrasonic method) that detects rebound of vibration waves by generating a voltage of a piezoelectric element, and mainly transmitted light of an infrared LED light source Alternatively, an infrared method for detecting reflected light or an electromagnetic induction method for inputting with an electronic pen may be employed.

When the user touches the display unit 18, the touch panel 19 detects input and outputs information specifying the position where the input has been made as an analog signal.
The analog front end unit 17 performs AD conversion on the analog signal output from the touch panel 19 and outputs the analog signal. The digital back end unit 16 performs a predetermined calculation based on the digital signal output from the analog front end unit 17 and outputs it to the control unit 12 as touch position information (input coordinate information).

The control unit 12 is configured as a microcomputer and controls each unit of the display device 10. In the embodiment according to the present invention, the control unit 12 appropriately executes any one of the touch monitor operation mode, the display operation mode, the keyboard operation mode, and the calculator operation mode as the operation mode of the display device.
The storage unit 14 is a storage unit that stores programs and various types of data for realizing each function of the display device 10, and is configured by a flash memory, for example. The storage unit 14 includes firmware 141 for touch monitor operation, firmware 142 for display operation, firmware 143 for keyboard operation, and firmware 144 for calculator operation, particularly as firmware for executing the above four operation modes. Is remembered.
The control unit 12 determines whether to operate in any of the above four operation modes based on a predetermined condition, and reads necessary firmware from the storage unit 14 and executes it according to the determined operation mode.

Below, with reference to FIGS. 2-5, the control example by the touch monitor operation mode, display operation mode, keyboard operation mode, and calculator operation mode which are performed with the display apparatus 10 is demonstrated. In each figure, the elements constituting the display device 10 are the same as those described in FIG. 1, and repeated description of the function of each element is omitted.
FIG. 2 is a diagram illustrating a control example of the display device when executing the touch monitor operation mode. The touch monitor operation mode corresponds to a first mode of the present invention in which operation information for the operation input unit is transmitted to the external device and a video signal transmitted from the external device is displayed on the display unit.

As described above, the operation mode executed by the display device 10 is determined by the control unit 12 based on a predetermined condition. When it is determined to execute the touch monitor operation mode, the control unit 12 first loads and executes the firmware 141 for the touch monitor operation from the storage unit 14.
In the touch monitor operation mode, the display device 10 functions as a touch monitor, and the control unit 12 directly transfers the touch position information obtained from the touch panel 19 to the terminal device 20 that is an external device. Here, for example, the touch position information is transferred to the terminal device 20 as a USB HID touch panel class which is a USB device class.

  The terminal device 20 performs processing based on the touch position information, and the video output from the terminal device 20 to the display device 10 according to the processing is appropriately processed by the video signal processing unit 13 and displayed on the display unit 18. The At this time, the OSD image can be added as necessary, but is not essential.

FIG. 3 is a diagram illustrating a control example of the display device when executing the display operation mode. The display operation mode corresponds to the second mode of the present invention in which the video signal transmitted from the external device is displayed on the display unit without transmitting operation information for the operation input unit to the external device.
When the control unit 12 determines to execute the display operation mode as the operation mode, the control unit 12 loads the firmware 142 for display operation from the storage unit 14 and executes it.
In the display operation mode, the video signal transmitted from the terminal device 20 is appropriately processed by the video signal processing unit 13 and displayed on the display unit 18. In this case, the touch position information by the touch panel 19 is not transmitted to the terminal device 20. In the display operation mode, the display device 10 functions as an external display of the terminal device 20.

FIG. 4 is a diagram illustrating a control example of the display device when executing the keyboard operation mode.
The keyboard operation mode corresponds to a third mode of the present invention in which operation information for the operation input unit is transmitted to an external device. When the control unit 12 determines to execute the keyboard operation mode, the control unit 12 first loads and executes keyboard operation firmware 143 from the storage unit 14.

  In the keyboard operation mode, the display device 10 functions as a keyboard. In this case, the control unit 12 causes the OSD processing unit 131 of the video signal processing unit 13 to generate a keyboard image and causes the display unit 18 to display the keyboard image. At this time, even if a video signal is transmitted from the terminal device 20, the video signal processing unit 13 can disregard this and display a keyboard image by the OSD on the display unit 18.

  Then, the control unit 12 compares the touch position information obtained from the touch panel 19 with the coordinates of the keyboard displayed on the display unit 18, and determines which key of the keyboard the input coordinates indicate. Based on the determination result, the key information of the keyboard is transmitted to the terminal device 20. The key information is set to a value equivalent to, for example, key information input with a general-purpose keyboard. Here, for example, the key information is transmitted to the terminal device 20 as a USBHID keyboard class which is a USB device class. The key information processing based on the touch position information may be performed by the digital back end unit 16.

  FIG. 5 is a diagram illustrating a control example of the display device when the calculator operation mode is executed. The calculator operation mode corresponds to a fourth mode of the present invention in which arithmetic processing is performed according to an operation input to the operation input unit, and the calculation processing result is displayed on the display unit. When the control unit 12 decides to execute the calculator mode, the control unit 12 first loads and executes the calculator operation firmware 144 from the storage unit 14.

  In the calculator operation mode, the display device 10 functions alone as a calculator. In this case, the control unit 12 causes the OSD processing unit 131 of the video signal processing unit 13 to generate a calculator image and causes the display unit 18 to display the calculator image. Then, the control unit 12 compares the touch position information obtained from the touch panel 19 with the key coordinates of the calculator displayed on the display unit 18, and determines which key of the calculator the input coordinates indicate. Then, based on the determination result, the numerical information input or the symbol input of the calculator is recognized, and the calculation corresponding to the calculation of the calculator is performed using the recognition information. This arithmetic processing may be performed by the digital back end unit 16.

  Then, the control unit 12 outputs the calculation result to the video signal processing unit 13, causes the OSD processing unit 131 to generate an OSD image and display the OSD image on the display unit 18. In this case, regardless of whether or not the terminal device 20 is connected to the display device 10, the display device 10 functions independently as a calculator regardless of the terminal device 20.

Next, switching setting of each of the above operation modes, that is, the touch panel monitor operation mode, the display operation mode, the keyboard operation mode, and the calculator operation mode will be described.
The switching setting of the operation mode in the display device 10 can be performed by manual setting and automatic setting. In the automatic setting, setting processing according to three embodiments can be further performed.

  6A and 6B are diagrams for explaining an example of manual setting of the operation mode. FIG. 6A is a schematic front view of the display device, and FIG. 6B is a diagram illustrating the display device of FIG. It is a principal part side view when seen. In this example, a switching key 30 for switching the operation mode of the display device 10 is provided on the display device 10. The control unit 12 of the display device 10 executes any one of the touch panel monitor operation mode, the display operation mode, the keyboard operation mode, and the calculator operation mode according to the position of the switching key 30. When the user manually operates the switching key 30, the operation mode is switched according to the operation of the switching key 30.

FIG. 7 is a diagram for explaining another example of manual setting of the operation mode. In this example, the operation mode is switched by the switching image 31 displayed on the display unit 18 of the display device 10.
The switching image 31 is generated as an OSD image by the OSD processing unit 131 and displayed at a predetermined position on the display unit 18. When the user touches the position of the switching image 31, the touch panel 19 detects the touch position, and the control unit 12 determines that the display position of the switching image 31 is touched based on the touch position information, and operates. Switch modes.

Next, an embodiment in which the operation mode is automatically set will be described. In order to automatically set the operation mode on the display device 10, the operation of the following embodiment can be performed.
(Embodiment 1)
FIG. 8 is a diagram for explaining the first embodiment relating to the automatic setting of the operation mode. FIG. 8A is a diagram showing a state where the connection cable is connected on the back side of the display device 10, and FIG. B) is a diagram showing an installation portion of a terminal for connecting a connection cable.

  As shown in FIG. 8, the display device 10 can be connected to the terminal device 20, which is an external device, via connection cables 41 and 42. Here, one connection cable 41 is for sending a video signal from the terminal device 20 to the display device 10, and is, for example, an HDMI cable or a DisplayPort cable. The other cable can send touch position information from the touch panel to the terminal device 20, and is, for example, a USB cable.

As shown in FIG. 8B, terminals 43 and 44 for connecting connection cables 41 and 42 are provided on the back side of the display device 10. The terminals 43 and 44 constitute a part of the communication interface unit 11.
The example of FIG. 8 shows an example of a communication interface unit for connecting to an external device, and is not limited to the configuration of FIG. For example, a configuration in which both the HDMI input terminal and the DisplayPort input terminal are provided and any of the connection cables is connected can be employed. Here, the display device 10 includes at least a terminal for inputting a video signal from the external terminal device 20 and a terminal for outputting touch position information to the terminal device 20. A terminal 43 for inputting a video signal corresponds to a video input terminal according to the present invention, and a terminal 44 for outputting touch position information as operation information corresponds to an operation input information output terminal according to the present invention.

In the first embodiment, the control unit 12 of the display device 10 determines in which operation mode to operate in accordance with the connection state of the connection cable to the terminals 43 and 44.
First, when the connection cables 41 and 42 are connected to both the terminal 43 that is a video input terminal and the terminal 44 that is an operation input information output terminal, the control unit 12 determines that the touch panel monitor operation is performed. . When both connection cables 41 and 42 are connected, the display device 10 displays a video signal from the terminal device 20 and can transmit touch position information to the terminal device 20. It can be made to function as a touch panel monitor capable of.

  Next, when the connection cable 42 is not connected to the terminal 44 that is the operation input information output terminal and the connection cable 41 is connected to the terminal 43 that is the video input terminal, the control unit 12 operates in the monitor operation mode. Decide that. In this case, since the video signal is input from the terminal device 20 and the touch position information of the display device 10 is not transmitted to the terminal device 20, the display device 10 can function as a monitor of the terminal device 20.

  Further, the control unit 12 determines to operate in the keyboard operation mode when the connection cable 42 is connected to the terminal 44 that is the operation input information output terminal and the connection cable 41 is not connected to the terminal 43 that is the video input terminal. To do. In this case, since no video signal is input from the terminal device 20 to the display device 10 and touch position information is transmitted from the display device 10 to the terminal device 20, the display device 10 functions as a keyboard. be able to.

  Further, when the connection cables 41 and 42 are not connected to both the terminal 43 that is a video input terminal and the terminal 44 that is an operation input information output terminal, the control unit 12 determines to execute the calculator operation mode. In this case, since the display device 10 is not connected to the terminal device 20, the display device 10 can function as a calculator that operates alone.

FIG. 9 is a flowchart for explaining a processing example of the first embodiment regarding the automatic setting of the operation mode. This will be described with reference to the configuration of FIG.
The control unit 12 of the display device 10 first detects a connection cable connected to each terminal of the display device 10 (step S1). Then, it is determined whether or not a connection cable for outputting operation input information is connected to the operation input information output terminal as a connection cable (step S2). The connection cable for outputting operation input information is, for example, a USB cable.

  When the connection cable for outputting operation input information is connected, the control unit 12 further determines whether or not the connection cable for video signal input is connected to the video input terminal (step S3). For video signal input, connection cables based on interface standards such as HDMI and DisplayPort are applied.

When the connection cable for video signal input is connected to each terminal in step S3, both the operation input information output cable and the video signal input connection cable are connected. The mode is executed (step S4).
If the video signal input connection cable is not connected in step S3, only the operation information output connection cable is connected, so the control unit 12 executes the keyboard operation mode (step S5).

  When the connection cable for outputting operation input information is not connected in step S2, the control unit 12 further determines whether or not a connection cable for video signal input is connected to the video input terminal (step S6). . When the connection cable for video signal input is connected in step S6, the control unit 12 executes the display operation mode (step S7). If the connection cable for video signal input is not connected in step S6, both the connection cable for outputting operation information and the connection cable for video signal input are not connected. The mode is executed (step S8).

  As described above, in the first embodiment, since the operation mode can be switched according to the connection state of the connection cable, it is possible to provide a high-performance display device that can be used in many applications depending on the use environment. it can.

(Embodiment 2)
In the second embodiment for automatically setting the operation mode, the display device 10 considers the connection state of the connection cable in the same manner as in the first embodiment and determines the connection cable when determining the operation mode. Consider whether or not a signal is actually input.
For the connection configuration example of the connection cable, refer to the example of FIG. Here, the control unit 12 is a case where the connection cables 41 and 42 are connected to both the terminal 43 that is the video input terminal and the terminal 44 that is the operation input information output terminal, and the video signal is transmitted to the terminal 43. When it is input, it is determined to operate in the touch panel monitor operation mode. When both the connection cables 41 and 42 are connected and when it is confirmed that the video signal is input to the terminal 43 through the connection cable 41 for inputting the video signal, the display device 10 is It can function as a touch panel monitor capable of display and operation input.

  In addition, the control unit 12 has a case where the connection cable 42 is not connected to the terminal 44 that is the operation input information output terminal and the connection cable 41 is connected to the terminal 43 that is the video input terminal, and the video is connected to the terminal 43. When the signal is input, it is determined to operate in the monitor operation mode. In this case, since the video signal is input from the terminal device 20 and the touch position information of the display device 10 is not transmitted to the terminal device 20, the display device 10 can function as a monitor of the terminal device 20.

  When the connection cable 41 is not connected to the terminal 43 which is a video input terminal, it is the same as in the first embodiment. That is, the control unit 12 determines to operate in the keyboard operation mode when the connection cable 42 is connected to the terminal 44 that is the operation input information output terminal and the connection cable 41 is not connected to the terminal 43 that is the video input terminal. To do. When the connection cables 41 and 42 are not connected to both the terminal 44 that is the operation input information output terminal and the terminal 43 that is the video input terminal, it is determined to execute the calculator operation mode.

  FIG. 10 is a flowchart for explaining a processing example of the second embodiment regarding automatic setting of the operation mode. The control unit 12 of the display device 10 first detects a connection cable connected to each terminal of the display device 10 (step S11). Then, it is determined whether or not a connection cable for outputting operation input information is connected to the operation input information output terminal as a connection cable (step S12). The connection cable for outputting operation input information is, for example, a USB cable.

  When the connection cable for outputting operation input information is connected, the control unit 12 further determines whether or not a video signal is input (step S13). For video signal input, an interface such as HDMI or DisplayPort is applied. When a video signal is input, a connection cable based on the standard of these interfaces is connected to the video input terminal of the display device 10, and the connection is made. Indicates that a video signal is being input from the cable.

When a video signal is input in step S13, both the operation input information output cable and the video signal input connection cable are connected and the video signal is input. Therefore, the control unit 12 sets the touch panel monitor operation mode. Execute (Step S14).
If no video signal is input in step S13, only the connection cable for operation information output is connected, or the video signal is not input even if the connection cable for video signal input is connected. The control unit 12 executes the keyboard operation mode (step S5).

  When the connection cable for outputting operation input information is not connected to the operation input information output terminal in step S12, the control unit 12 further determines whether or not a video signal is being input (step S16). When the video signal is input in step S16, the control unit 12 executes the display operation mode (step S17). If no video signal is input in step S16, the operation information output connection cable is not connected and no video signal is input, so the control unit 12 executes the calculator operation mode (step S18). ).

  As described above, in the second embodiment, since the operation mode can be switched according to the connection state of the connection cable and the presence / absence of the input of the video signal, the high-functionality that can be used in many applications depending on the use environment. A display device can be provided.

(Embodiment 3)
FIG. 11 is a diagram for explaining a third embodiment relating to automatic setting of the operation mode, and FIG. 11A is a schematic perspective view of the display device 10 configured such that the installation angle can be changed by a stand. 11 (B) is a schematic view of the display device 10 as viewed from the side.
In the present embodiment, a stand 51 is attached to the main body 50 of the display device 10, and the operation mode is switched according to the tilt angle of the display unit of the display device 10 by the stand 51. Specifically, the inclination angle θ is an inclination angle with respect to the horizontal direction of the display screen of the display unit 18.

When detecting the tilt angle with respect to the horizontal plane, an acceleration sensor is provided in the main body 50 of the display device 10, and the tilt angle of the main body 50 is detected by the gravitational acceleration detected by the acceleration sensor. In this case, the maximum inclination angle (0 to 90 °) between the display screen of the display unit 18 and the horizontal plane can be calculated based on the detection result of the acceleration sensor, and the maximum inclination angle can be set as the inclination angle θ.
Alternatively, a semi-fixed resistor (volume) is attached to the hinge connection portion P between the stand 51 and the main body 50, and the resistance value is set to be variable according to the leg angle between the stand 51 and the main body 50, and displayed. The control unit 12 of the apparatus 10 may read the resistance value and calculate the tilt angle θ. The tilt detection unit of the present invention is realized by the acceleration sensor or the semi-fixed resistor and the control unit 12 that calculates the tilt angle from these output values.

When the tilt angle θ is obtained by the above configuration, the control unit 12 determines an operation mode to be executed according to a predetermined tilt angle range. An example of determining the operation mode based on the tilt angle will be described with reference to the flowchart of FIG.
The control unit 12 of the display device 10 previously determines the first to fourth ranges as the tilt angle range of the display unit. In this example, the first range is 0 ° ≦ θ <10 °, the second range is 10 ° ≦ θ <20 °, the third range is 20 ≦ θ <80 °, and the fourth range The range is 80 ° ≦ θ ≦ 90 °. The installation angle θ is determined in the range of 0 to 90 °. The first to fourth ranges correspond to first to fourth stage tilt angle ranges set in order from the smallest tilt angle.

  Here, when the control unit 12 of the display device 10 detects the tilt angle θ (step S21), it is determined which of the first range to the fourth range the detected tilt angle θ is included. Here, when the inclination angle θ is included in the first range (step S22—Yes), the control unit 12 executes the calculator operation mode (step S23). In the first range, the display screen of the display unit 18 is substantially horizontal. This angle range is not a form used as a touch panel monitor, but coincides with a general inclination angle as a usage form of a calculator. Therefore, when the inclination angle θ is included in the first range, the calculator operation mode is executed as a calculator. Make it available.

  When the detected tilt angle is included in the second range (step S24-Yes), the control unit 12 executes the keyboard operation mode (step S25). Since the second range matches the general tilt angle of the keyboard, when the tilt angle θ is included in the second range, the keyboard operation mode is executed so that the keyboard can be used.

  When the detected tilt angle is included in the third range (step S26—Yes), the control unit 12 executes the touch panel monitor operation mode (step S27). Since the third range is an inclination angle suitable for the touch operation, when the inclination angle θ is included in the third range, the touch panel monitor operation is executed so that it can be used as a touch panel monitor.

  When the detected tilt angle is included in the fourth range (step S28—Yes), the control unit 12 executes the display operation mode (step S29). The fourth range is usually used as a display because it is too steep for a touch operation. Therefore, when the tilt angle θ is included in the fourth range, the display operation mode is executed so that the display can be used as a display.

  As described above, in the third embodiment, since the operation mode can be switched according to the tilt angle of the display device 10, a high-function display device that can be used in many applications depending on the use environment is provided. Can do.

(Embodiment 4)
FIG. 13 is a diagram for explaining a fourth embodiment relating to automatic setting of the operation mode. FIG. 13A is a diagram showing a state when a hand is placed at the home position of the keyboard. FIG. 5B is a diagram illustrating a state when touch input is performed with a pen.
In the fourth embodiment, the operation mode is switched according to the state of the touch area on the touch panel 19 of the display device 10. In this case, the control unit 12 of the display device 10 previously determines the state of the touch area for switching the operation mode.

  In this example, the state of the touch area in which the user places a finger at the home position of the keyboard and touches the touch panel is determined in advance as the first touch state. FIG. 13A shows a state in which the hands 61 and 62 are placed on the keyboard display screen for the sake of explanation, but in reality, the keyboard is not displayed at the stage of determining the operation mode. The control unit 12 determines whether the touch state of the user's hand matches the touch of the home position.

In this case, the control unit 12 stores in the storage unit 14 information that determines the positional relationship of each finger when placed on the keyboard at the home position. Here, the positional relationship of the five fingers of the right hand and the five fingers of the left hand can be stored for each hand. Further, the positional relationship of four fingers excluding the thumb may be stored.
When the touch panel 19 is touched with an area having a size and shape that is regarded as a finger, the control unit 12 determines whether or not the hand is in the home position from the positional relationship of the finger. A threshold is provided for the shape and size of the area for determining the finger and the position for determining the positional relationship of each finger, and it is possible to determine the home position when touched within a certain range. When the fingers of both hands touch the shape of the home position, the control unit 12 determines that the touch state is the first touch state, and determines the operation mode determined based on the first touch state.

  In addition, the control unit 12 determines in advance the state of the touch area where the user has touched the touch panel using the touch pen as the second touch state. FIG. 13B shows a touch state using a touch pen. In this case, the contact area with respect to the touch panel 19 is an area where the pen tip area of the touch pen 63 and the right hand 64 of the user holding the touch pen 63 are in contact with the touch panel 19. The shape and positional relationship of these two areas are determined in advance. Also, the shape and positional relationship between the contact area of the left hand and the tip of the touch pen are determined in advance so as to be compatible with left-handed users.

  When the touch pen 63 and a region having a size and shape regarded as a hand holding the touch pen 63 are touched on the touch panel 19, the control unit 12 determines that the touch operation is performed with the touch pen from the positional relationship. A threshold value is provided for the shape and size of the area for determining the touch operation with the touch pen 63 and the range for determining the positional relationship between the areas, and the touch operation with the touch pen 63 is performed when touched within a certain range. Can be judged. Then, when a touch operation with the touch pen 63 is performed, the control unit 12 determines that the touch state is the second touch state, and determines an operation mode determined based on the second touch state.

  FIG. 14 is a flowchart for explaining operation mode determination processing based on a touch state. Here, first, the control unit 12 of the display device 10 detects a touch area on the touch panel 19 (step S31). Then, it is determined whether or not the touch area matches the shape of the home position of the keyboard (step S32). If the touch area matches the shape of the home position, the keyboard operation mode is executed (step S36). When the user wants to make the display device 10 function as a keyboard, the keyboard operation mode can be automatically executed on the display device 10 by touching in the shape of the home position.

  If it is determined in step S32 that the touch area does not match the shape of the home position, the control unit 12 next determines whether or not the touch area is the shape of a touch operation with the touch pen (step S33). If it is determined that the touch operation is performed with the touch pen, the touch panel monitor operation mode is executed (step S35). When the user wants the display device 10 to function as a touch panel monitor, the touch device can be automatically operated on the display device 10 by holding the touch pen and touching the touch panel.

  If it is determined in step S33 that the touch area is not the shape of the touch operation with the touch pen, the control unit 12 executes another operation mode, that is, the calculator operation mode or the display operation mode. Which operation mode is to be executed can be determined in advance.

  As described above, in the fourth embodiment, since the operation mode can be switched according to the touch area of the display device 10, a high-functional display device that can be used for many purposes according to the use environment is provided. Can do.

  The technical features (components) described in each of the above embodiments can be combined with each other, and new technical features can be formed by combining them.

DESCRIPTION OF SYMBOLS 10 ... Display apparatus, 11 ... Communication interface part, 12 ... Control part, 13 ... Video signal processing part, 14 ... Memory | storage part, 15 ... Timing controller, 16 ... Digital back end part, 17 ... Analog front end part, 18 ... Display 19 ... touch panel 20 ... terminal device 30 ... switching key 31 ... switching image 41 ... connection cable 42 ... connection cable 43 ... terminal 44 ... terminal 50 ... main body 51 ... stand 61 ... hand, 62 ... hand, 63 ... touch pen, 64 ... right hand, 131 ... OSD processing unit, 141 ... firmware for touch monitor operation, 142 ... firmware for display operation, 143 ... firmware for keyboard operation, 144 ... calculator operation Firmware for.

Claims (7)

A display device comprising: a display unit that displays an input video signal; an operation input unit that receives an operation input by a user; and a communication interface unit that transmits and receives data to and from an external device. A control unit that switches a predetermined operation mode set in the apparatus;
The communication interface unit includes a video input terminal that receives a video signal from an external device, and an operation input information output terminal that outputs operation input information for the operation input unit from the display device to the external device,
The control unit switches and sets the operation mode in accordance with a connection state of a connection cable between the operation input information output terminal and the video input terminal. The display device according to claim 1,
The operation mode is:
A first mode for transmitting operation information for the operation input unit to an external device and displaying a video signal transmitted from the external device on the display unit;
A second mode for displaying a video signal transmitted from the external device on a display unit without transmitting operation information for the operation input unit to the external device;
A third mode for transmitting operation information for the operation input unit to an external device;
A predetermined calculation process is performed according to an operation input to the operation input unit, and a fourth mode for displaying the calculation process result on the display unit is set to be switchable,
The control unit sets the first mode when a connection cable is connected to both the operation input information output terminal and the video input terminal,
When a connection cable is not connected to the operation input information output terminal and a connection cable is connected to the video input terminal, the mode is set to the second mode,
When a connection cable is connected to the operation input information output terminal and a connection cable is not connected to the video input terminal, the mode is set to the third mode,
The display device is set to the fourth mode when a connection cable is not connected to both the operation input information output terminal and the video input terminal. The display device according to claim 1,
The operation mode is:
A first mode for transmitting operation information for the operation input unit to an external device and displaying a video signal transmitted from the external device on the display unit;
A second mode for displaying a video signal transmitted from the external device on a display unit without transmitting operation information for the operation input unit to the external device;
A third mode for transmitting operation information for the operation input unit to an external device;
A predetermined calculation process is performed in response to an operation input to the operation input unit, and the fourth mode for displaying the calculation process result on the display unit is set to be switchable,
The control unit is set to the first mode when a connection cable is connected to both the operation input information output terminal and the video input terminal and a video signal is input from the external device to the video input terminal. And
When a connection cable is not connected to the operation input information output terminal, a connection cable is connected to the video input terminal, and a video signal is input to the video input terminal, the mode is set to the second mode,
When a connection cable is connected to the operation input information output terminal and a connection cable is not connected to the video input terminal, the mode is set to the third mode,
The display device is set to the fourth mode when a connection cable is not connected to both the operation input information output terminal and the video input terminal. A display device including a display unit that displays an input video signal, an operation input unit that receives an operation input by a user, and a communication interface unit that transmits and receives data to and from an external device,
A control unit for switching a predetermined operation mode set in the display device;
An inclination detection unit for detecting the inclination of the display unit;
The display device according to claim 1, wherein the control unit switches and sets the operation mode according to a detection result by the tilt detection unit. The display device according to claim 4,
The operation mode is:
A first mode for transmitting operation information for the operation input unit to an external device and displaying a video signal transmitted from the external device on the display unit;
A second mode for displaying a video signal transmitted from the external device on a display unit without transmitting operation information for the operation input unit to the external device;
A third mode for transmitting operation information for the operation input unit to an external device;
A predetermined calculation process is performed in response to an operation input to the operation input unit, and the fourth mode for displaying the calculation process result on the display unit is set to be switchable,
The control unit sets the first to fourth steps in descending order of the tilt angle of the screen of the display unit with respect to the horizontal direction, and the tilt angle is set to the first step based on the detection result of the tilt detection unit. When the tilt angle is in the second range, the fourth mode is set. When the tilt angle is in the second step range, the third mode is set. When the tilt angle is in the third step, the first mode is set. The display device is set to a mode, and is set to the second mode when the tilt angle is in the fourth stage. A display device comprising: a display unit that displays an input video signal; an operation input unit that receives an operation input by a user; and a communication interface unit that transmits and receives data to and from an external device. A control unit that switches a predetermined operation mode set in the apparatus;
The display unit, wherein the control unit detects a touch area of a contact object with respect to the display unit, and switches and sets the operation mode based on a state of the touch area. The display device according to claim 6,
The operation mode is:
A first mode for transmitting operation information for the operation input unit to an external device and displaying a video signal transmitted from the external device on the display unit;
A second mode for displaying a video signal transmitted from the external device on a display unit without transmitting operation information for the operation input unit to the external device;
A third mode for transmitting operation information for the operation input unit to an external device;
A predetermined calculation process is performed in response to an operation input to the operation input unit, and the fourth mode for displaying the calculation process result on the display unit is set to be switchable,
When the control unit determines that the touch area matches a predetermined touch shape of the home position of the keyboard, the control unit sets the third mode,
When it is determined that the touch area matches a predetermined pen holding state, the first mode is set, and it is determined that neither the home position shape of the keyboard nor the shape holding the pen matches. Sometimes the display device is set to the fourth or second mode.

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