JP2004064261A - Remote control apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote control apparatus capable of transmitting / receiving data by detouring shielding objects. <P>SOLUTION: A transmitter-receiver 10 makes transmission through an antenna 16. A data converter 11 converts a parallel signal from the transmitter-receiver 10 into a serial signal and supplies the parallel signal to the transmitter-receiver 10. A central processing unit 12 instructs the data converter 11 to convert data. A storage device 13 stores an instruction to the central processing unit 12. An input device 15 gives inputs to the central processing unit 12. A display apparatus 14 displays an arithmetic result of the central processing unit 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Technology to which the invention belongs]
The present invention relates to a remote control device.
[0002]
[Prior art]
2. Description of the Related Art When a command related to the operation of an electric appliance is sent to a conventional remote control device, a format in which the command is modulated to infrared rays and sent is generally used.
[0003]
[Problems to be solved by the invention]
However, with conventional remote control devices, infrared is a very effective means for sending commands over short distances.However, since there are many designs where the direction of emission of infrared rays is usually limited to one direction, remote control is often used for devices that send commands. There is an inconvenience that the user has to point the control device to operate. In addition, if there is a shield between the remote control device and the device that receives the command, the command may not be received because the infrared rays are blocked. For example, when a presentation is performed by connecting a personal computer and a liquid crystal projector with a wireless transmission device, even if an attempt is made to control the wireless transmission device attached to the personal computer from an infrared remote control device, there is no shielding between the wireless transmission device and the wireless transmission device. It is not always the case, and there may be cases where the command does not arrive due to a shield such as a human body or a chair.
[0004]
When a command is transmitted wirelessly, the radio wave has effects such as refraction, diffraction, and reflection. In addition to linear propagation, the radio wave may propagate to a target location due to these physical effects. Therefore, when sending a command using radio waves, it is not necessary to point the remote control device directly at the other party. Also, when transmitting a large amount of data such as images wirelessly, it is usually necessary to perform processing such as data compression technology, and it is also assumed that an error occurs at the time of transmission and the same data is retransmitted. It takes a lot of time. When performing a presentation or the like, these waiting times may be silence times, and may hinder a smooth flow of the presentation. Therefore, if the person giving the presentation can turn pages without being noticed by the audience, the person giving the presentation can make a continuous presentation. However, if the user operates the keys of the personal computer or turns the infrared remote control device in the direction of sending the command, the audience will know that the page has been turned. Therefore, wireless command transmission is the preferred method.
[0005]
In recent years, there has been an increase in the number of cases in which data from a personal computer is sent to a liquid crystal projector by electronic transmission and the data is displayed on the screen for presentation.However, in order to switch the screen by operating the personal computer keyboard, When giving a presentation alone, it was necessary to perform key operations each time the screen was switched. When the position of the personal computer was far from the person giving the presentation, it was necessary to go to the personal computer every time the screen was switched, and it was not possible to give a smooth presentation.
[0006]
The problem to be solved by the present invention is to first transmit a command wirelessly. Upon receiving the instruction, the wireless transmission system executes the instruction, constructs a device that feeds back the result to the remote control device, and combines the remote control device with a device used for presentation such as a pointer to construct a composite device. Make things an issue.
[0007]
[Means for Solving the Problems]
The remote control device of the present invention is an antenna, a transceiver that performs transmission and reception through the antenna, and a data converter that converts a parallel signal from the transceiver into a serial signal and supplies a parallel signal to the transceiver, A central processing unit that instructs the data converter to perform data conversion, a storage device that stores instructions for the central processing unit, an input device that inputs to the central processing unit, and a calculation result of the central processing unit. A display device for displaying.
[0008]
By using a high frequency, data can be transmitted to a target location by refraction, diffraction, reflection, and the like by these physical effects in addition to linear propagation.
[0009]
Further, the remote control device of the present invention, a start code for recognizing the start of the parallel signal data, a control code storing information of the parallel signal,
An instruction signal storing an instruction to be executed, a pass / fail judgment code for judging pass / fail of the signal, and an end signal indicating end of data are provided, and the instruction signal is a plurality of signals having the same contents.
[0010]
By transmitting a plurality of command signals having the same contents, data can be transmitted / received without repeating transmission / reception even when transmission / reception conditions are poor.
[0011]
In the remote control device of the present invention, the input device has a page feed button for displaying a next image and a page return button for displaying a previous image. A desired screen can be displayed freely.
[0012]
Further, the remote control device of the present invention may include a pointer pointing to a screen, and the pointer may be used as an antenna.
[0013]
By also using the antenna, even when the antenna cannot be stored inside the remote control device, the antenna can be kept out of the way.
[0014]
Further, in the remote control device of the present invention, the pointer may be extendable and retractable.
[0015]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a hardware configuration of a remote control device according to the present invention. The remote control device 100 is a wireless transmission device that sends a command related to transmission using the same frequency as the transmission to a wireless transmission system that transmits images and data, such as between personal computers or between a personal computer and a liquid crystal projector device. A monolithic transceiver 10 capable of transmitting and receiving the same frequency with the same module in the wireless device, a UART (Universal Asynchronous Receiver Transmitter) 11 for performing parallel-to-serial conversion for transmission and performing serial-to-parallel conversion for reception, and transmission And a central processing unit 12 for managing received data, a storage device 13, a display device 14, an input device 15, and an antenna 16. The transceiver 10 is a monolithic transceiver having a maximum transmission speed of 1 megabit per second. The central processing unit 12 may use any number of clocks or processing bits as long as the target processing can be performed. Here, an 8-bit microprocessor with a basic clock frequency of 32 MHz is used. The storage device 13 determines the dose according to the processing target. Here, a 4 megabit DRAM is used. The display device 14 may be either color or monochrome, and may be driven in any form including liquid crystal. Here, a monochrome liquid crystal is used. The input device 15 used a keypad. The basic configuration of the input device 15 is composed of three buttons for page feed, page return, and display.
[0016]
Next, the operation will be described. FIG. 4 shows a flowchart of the operation of the remote controller. When the button of the input device 15 is pressed, the central processing unit 12 extracts the command of the pressed button from the storage device 13 and creates the packet 200 shown in FIG. The packet 200 includes a start code 210, a control code 220, instructions 230, 240, 250, a pass / fail judgment code 260, and an end code 270. The start code 210 is a 12-bit signal “000111111110”. The control code 220 includes a packet number, a destination, a transmission source, a data length, and other items necessary for transmission and reception. All three instructions 230, 240, 250 are the same. The characteristic of the packet 200 is that the same command is repeated several times and added to the packet. In the present embodiment, it is repeated three times. The number of instructions may be, for example, 5 to 10 times or may be reduced depending on the state of transmission and reception. The same command is repeated by a data calibration method that, even if the content of the command is partially destroyed due to noise, retransmission is not necessary if two deliveries are normally made within the number of repetitions. The pass / fail judgment code 260 is determined by the CRC 16 or the like based on whether the transmitted signal matches the received signal. The end code 270 uses a 12-bit signal “111000000001”.
[0017]
On the transmitting side, the remote control device 100 and the transmitting side of the data transmission system (not shown) perform handshaking (step 101). The remote control device 100 creates a packet 200 to which a command code has been added (step 102). The remote control device 100 transmits the command packet 200 to the data transmission system (Step 103). The data transmission system compares the received data with a pass / fail judgment code (step 104). As a result of the comparison, when it is determined that the data is good (step 121), the data transmission system transmits the received command to a personal computer (not shown) to which the data is transmitted (step 105). The personal computer executes the command (step 106). On the other hand, if it is determined that the packet is not good (step 121), the remote control device 100 transmits the command packet 200 to the data transmission system (step 103), and the process is repeated until it is determined that the packet is good (step 121). The personal computer replies the command execution status to the data transmission system (step 107).
[0018]
At this time, the command execution status signal transmitted by the personal computer is shown in FIG. The instruction execution status packet 300 includes a start code 310, a control code 320, execution statuses 330, 340, 350, a pass / fail judgment code 360, and an end code 370. The start code 310 is a 12-bit signal “000111111110”. The control code 320 includes a packet number, a destination, a transmission source, a data length, and other items necessary for transmission and reception. All three implementations 330, 340, 350 are the same. The characteristic of the packet 300 is that the same instruction is repeated several times and added to the packet. In the present embodiment, it is repeated three times. The number of instructions may be set freely according to the state of transmission and reception. The same command is repeated by a data calibration method that, even if the content of the command is partially destroyed due to noise, retransmission is not necessary if two deliveries are normally made within the number of repetitions. The pass / fail judgment code 360 is determined by the CRC 16 or the like based on whether the transmitted signal matches the received signal. The end code 370 uses a 12-bit signal “111000000001”.
[0019]
The data transmission system creates a packet to which the execution status code is added (step 108). The data transmission system transmits the execution status packet to the remote control device 100 (Step 109). The remote control device 100 compares the received data with a pass / fail judgment code (step 110). As a result of the comparison, when it is determined to be good (step 122), the remote control device 100 displays the execution status on the display device 14 (step 111). On the other hand, if it is determined that the remote control device 100 is not good (step 122), the data transmission system transmits an execution status packet to the remote control device 100 (step 109), and the process is repeated until the remote control device 100 is determined to be good (step 122). .
[0020]
FIG. 5 is an external view of the remote control device 100 without a pointer. On the upper surface of the remote control device 100, four buttons 51 to 54 and a display device 14 are provided. The buttons are a display button 51 for displaying an image, a page forward button 52 for displaying the image of the next page, a page return button 53 and a reset button 54 for displaying the image of the previous page. In some cases, it is not possible to secure a sufficient space for disposing the antenna 16 necessary for wireless transmission. For example, when a 315 MHz radio wave is used, the wavelength is 95 cm. Since the antenna 16 needs an antenna 16 of at least a quarter wavelength in consideration of its launch efficiency, a linear portion holding the antenna 16 of 23.75 cm is required. In such a case, the pointer 61 shown below may also serve as the antenna 16.
[0021]
FIG. 6 shows an application example of the remote control device 101 combined with the pointer 61. The portion of the pointer 61 becomes a long straight line portion. By using the part of the pointer 61 directly as the antenna 16 or by storing the antenna 16 in the pointer 61, the antenna 16 can be linearly arranged. Since the pointer 61 is often directed upward when explaining the display, the emission efficiency and the reception efficiency of radio waves can be increased. By combining the pointer 61 and the antenna 16, a better effect can be obtained. In addition, the pointer 61 may be made expandable and contractible.
[0022]
As described above, when a remote control device of the present invention is combined with, for example, a device necessary for a presentation, and a presentation is performed on a screen using a liquid crystal projector, generally, a large number of presenters display the displayed image. It is helpful when standing on the edge of a book and explaining the contents while pointing with a pointer or the like. That is, the presenter can hold the two persons with one hand by combining the pointer and the remote control device. For example, the device is an effective means when there is a preliminary document and explanation is made while viewing the preliminary document with one hand.
[0023]
Next, when a presentation is made using a wireless data transmission system and the remote control device 100 of the present invention to a personal computer and a liquid crystal projector, the procedure will be described in more detail. A presenter who makes a presentation first prepares for a presentation (step 201). Preparation includes the connection and startup of devices such as personal computers. Next, the display of the first page of the presentation is displayed using the keyboard of the personal computer (step 202). When the explanation of the first page is almost completed, the presenter presses the page feed button 52 and then presses the display button 51 (step 203). The display switches to the second page (step 204), and the presenter explains the second page. If the third page does not need to be explained, the presenter presses the page feed button 52 twice and then presses the display button 51 (step 205). With this operation, the third page is not displayed, and the fourth page is displayed (step 206). The presenter finishes the explanation of the fourth page, presses the page feed button 52 once to display the fifth page, and presses the display button 51 (step 207). The fifth page is displayed (step 208), and the presenter begins to explain the fifth page. However, since the display of the fourth page is required, the presenter presses the page return button 53 once and presses the display button 51 (step 209). The fourth page is displayed (Step 210).
[0024]
As described above, in an actual presentation, it is common to skip a page or return to a previous page as necessary. Therefore, the presentation can be performed without showing unnecessary pages to the audience by combining the page feed button 52, the page return button 53, and the display button 51. The function of the reset button 54 is to press this button when the number of times the page feed button 51 and the page return button 53 are pressed is wrong. Pressing the reset button 54 resets the number of page feeds or page returns.
[0025]
【The invention's effect】
In a presentation where data from a personal computer is sent to a liquid crystal projector by wireless transmission and the data is displayed on the liquid crystal projector, the presentation can be easily performed by one person using the remote control device of the present invention. That is the effect of the present invention.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a configuration of hardware.
FIG. 2 is a configuration diagram illustrating a data configuration of an instruction packet.
FIG. 3 is a configuration diagram showing a data configuration of an implementation status return packet.
FIG. 4 is a flowchart of transmission of a command and execution of the command.
FIG. 5 is an external view of a remote control device.
FIG. 6 is another external view of the remote control device.
FIG. 7 is a flowchart when a presentation is performed.
[Explanation of symbols]
10 Monolithic transceiver 11 UART
12 Central Processing Unit 13 Storage Device 14 Display Device 15 Input Device 16 Antenna 51 Display Button 52 Page Forward Button 53 Page Return Button 54 Reset Button

Claims (5)

Antenna and
A transceiver for transmitting and receiving through the antenna,
A data converter that converts a parallel signal from the transceiver to a serial signal and supplies a parallel signal to the transceiver.
A central processing unit that instructs the data converter to perform data conversion;
A storage device storing instructions for the central processing unit;
An input device for inputting to the central processing unit;
A display device for displaying a calculation result of the central processing unit. A start code for the parallel signal to recognize the start of data;
A control code storing information of the parallel signal,
An instruction signal storing an instruction to be executed,
A pass / fail judgment code for judging pass / fail of the signal;
An end signal indicating the end of data,
2. The remote control device according to claim 1, wherein the command signal is a plurality of signals having the same content. 3. The remote control device according to claim 1, wherein the input device includes a page feed button for displaying a next image and a page return button for displaying a previous image. 4. Has a pointer pointing to the screen,
The remote control device according to claim 1, wherein the pointer is the antenna. 5. The remote control device according to claim 4, wherein the pointer is extendable.

Images