JP2007074268A - Non-contact data communication system, display apparatus, method for transmitting non-contact data, and method and apparatus for receiving data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact data communication system, a display apparatus, a data receiving apparatus, a non-contact data transmitting method, and a data receiving method, in which data corresponding to a position on a display picture can be received and acquired in a non-contact state by intuitive and simple operation. <P>SOLUTION: When file data related to an icon AK1 on an LCD 20 are superposed by using a luminance change in light generated from a light emitting element 22 used as a light source of the LCD 20 and allowed to be quickly switched, the luminance change of the LCD 20 is received by a light receiving element 37 in a portable memory apparatus 3 and the file data superposed correspondingly to the icon AK1 of the LCD 20 are acquired and stored, the file data related to the icon AK1 can be acquired from the picture of a display part 4 in a non-contact state and stored only by receiving the luminance change of the icon AK1 on the display part 4 which is selected by a user by using the light receiving element 37 of the portable memory apparatus 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a contactless data communication system, a display device, a data reception device, a contactless data transmission method, and a data reception method, and is suitable for application to optical data communication in a contactless manner with a display screen, for example. .

Conventionally, the transmitter superimposes predetermined data to be transmitted on the luminance signal of each pixel of the display image displayed on the two-dimensional display device, and the receiver has a one-to-one correspondence with each pixel of the display image of the transmitter. There is a non-contact data communication system in which data is transmitted and received in a non-contact manner by receiving the data by a two-dimensional image sensor having a light receiving element (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2004-64465

  By the way, in the non-contact data communication system having such a configuration, an image of the entire display screen of the two-dimensional display device is formed on the entire sensor surface by the image sensor of the receiver, and high-capacity data is communicated at high speed. Only one type of data could be exchanged at a time.

  Further, in this non-contact data communication system, the display screen of the two-dimensional display device and the sensor surface of the image sensor in the receiver must be accurately aligned, which forces the user to perform an accurate and complicated operation. It was.

  The present invention has been made in consideration of the above points, and intends to propose a non-contact data communication system that can receive and acquire data in accordance with the position on the display screen in a non-contact manner with an intuitive and simple operation. To do.

  In order to solve such a problem, in the non-contact data communication system of the present invention, a high-speed switchable light-emitting element used as a light source of a display screen uses a change in luminance of light generated from the display screen to perform the above on the display screen. A display device that superimposes predetermined transmission data associated with a position, and the transmission data superimposed in association with the position on the display screen is obtained by receiving a change in light luminance by a predetermined light receiving element. And a data receiving device for storing the data.

  Thus, the transmission data associated with the arbitrary position on the display screen can be obtained from the display screen only by receiving the luminance change at the arbitrary position on the display screen selected by the user by the light receiving element of the data receiving device. It can be acquired and stored without contact.

  In the display device of the present invention, a display screen, a light-emitting element capable of high-speed switching used as a light source of the display screen, and a luminance change of light generated from the display screen by the light-emitting element are used on the display screen. Data superimposing means for superimposing predetermined transmission data associated with the position of the light-emitting element, and the light emitting element performs high-speed switching based on the transmission data associated with the position of the display screen, and emits light generated from the display screen with luminance. By changing the transmission data, the transmission data is optically transmitted to a predetermined data receiving apparatus which is a communication target of non-contact data communication.

  As a result, predetermined transmission data corresponding to the position of the display screen can be optically transmitted to the data receiving device by a change in luminance. Therefore, if a position on the display screen is selected, transmission corresponding to the position is performed. Data can be acquired by the data receiving device without contact.

  Furthermore, in the data receiving device of the present invention, predetermined transmission data associated with the position of the display screen is superimposed on the light generated from the display screen by the light-emitting element capable of high-speed switching used as the light source of the display screen. A light receiving element that receives a change in luminance of the light when the light is received, and the transmission data superimposed and associated with the position of the display screen is acquired based on the luminance change of the light received by the light receiving element. A data restoring means and a data storage means for storing transmission data acquired by the data restoring means are provided.

  As a result, transmission data associated with an arbitrary position on the display screen can be acquired in a non-contact manner from the display screen only by receiving a change in luminance at an arbitrary position on the display screen selected by the user by the light receiving element. And memorize it.

  According to the present invention, the luminance change at an arbitrary position on the display screen selected by the user is received by the light receiving element of the data receiving apparatus, and the display screen is associated with the arbitrary position on the display screen. A non-contact data communication system that can acquire and store transmission data in a non-contact manner, and can receive and acquire data associated with a position on a display screen in a non-contact manner through an intuitive and simple operation. Can be realized.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Overall Configuration of Contactless Data Communication System In FIG. 1, reference numeral 1 denotes the contactless data communication system of the present invention as a whole, and a personal computer 2 and a portable memory that exchanges data with the personal computer 2. The apparatus 3 is comprised.

  The personal computer 2 displays an image based on various data read out by the main body 5 on a display unit 4 made of, for example, a ferroelectric LCD (Liquid Crystal Display). 4 can exchange data with the portable memory device 3 through the display screen 4 in a non-contact manner.

  That is, in the personal computer 2, by using the display unit 4 made of a ferroelectric LCD having a backlight in which light-emitting elements capable of high-speed switching are arranged in an array, a high-speed response when turning on and off the light of each light-emitting element. Therefore, various data can be optically transmitted from the display screen of the display unit 4 to the portable memory device 3.

  Therefore, the portable memory device 3 can directly receive data from the icons AK1, AK2, and AK3 displayed on the display screen of the display unit 4 in a non-contact manner.

In the personal computer 2, the display unit 4 using a light-emitting element capable of high-speed switching as a backlight is not limited to a ferroelectric LCD. Electroluminescence Display), FED (Field
It is possible to use a display unit 4 having various other configurations such as an Emission Display) and an LED display. Specifically, for example, high-speed data communication of several Mbps or more can be realized.

(2) Circuit Configuration of Contactless Data Communication System Next, the circuit configuration of the contactless data communication system 1 will be described with reference to FIG. The personal computer 2 is generally controlled by a control circuit 10 having a central processing unit (CPU) configuration of the main body 5 and is generally controlled according to a basic program and various application programs that are read from the storage unit 11 that is a hard disk and started. The processing performed by the personal computer is executed, and non-contact data communication can be executed between the display screen of the display unit 4 and the portable memory device 3 as described above.

  In the display unit 4, the light emitting elements 22 made up of R (red), G (green), and B (blue) LEDs (Light Emitting Diodes) are associated with each pixel constituting the LCD 20 on a one-to-one basis. This is a so-called field sequential method in which the backlight unit 21 arranged in a matrix is provided behind the LCD 20 and the luminance is controlled through the light emitting element 22 according to the length of on-time of the pixel.

  As a method of displaying a color image by such a field sequential display unit 4, the on-time of each of R, G, and B in the light emitting element 22 is controlled according to the display color of each pixel constituting the LCD 20. A color image is displayed on the display screen.

  The personal computer 2 is based on transmission data for optical transmission to the portable memory device 3 while displaying a visually observable image based on the data read from the storage unit 11 on the LCD 20 of the display unit 4 by the display control circuit 12. Thus, the luminance of the light generated from the light emitting element 22 is changed.

  In practice, the control circuit 10 of the main unit 5 displays, for example, icons AK1 to AK3 as display objects in the image data from the display control circuit 11 that manages the image data being displayed on the display screen of the display unit 4. In the case, the two-dimensional coordinates on the display screen of the icons AK1 to AK3 are acquired.

  The control circuit 10 performs the two-dimensional coordinates of each pixel on the display screen corresponding to the display object (icons AK1 to AK3) displayed on the display unit 4 and the two-dimensional coordinates (that is, the icons AK1 to AK3). A coordinate related data correspondence table 18 that uniquely associates data of an associated file (hereinafter referred to as file data) is generated, and the coordinate related data correspondence table is generated from the coordinate related data correspondence table in the past display screen. Update to 18.

  Under the control of the control circuit 10, the encoding circuit 13 generates an ID packet based on unique ID (Identification) information associated with each of the plurality of light emitting elements 22 in the backlight unit 21, and generates this ID packet. In accordance with the modulation result, the LED array driver 15 causes the light emitting elements 22 of the backlight unit 21 to perform a high-speed switching operation, whereby the ID packet of each light emitting element 22 is displayed on the display screen of the LCD 20 using visible light as a medium. It is designed to transmit light through the network. This ID packet is always output from each light emitting element 22.

  On the other hand, the portable memory device 3 is provided with a light receiving element 37 made of a photodiode at the tip thereof, and receives light for, for example, an icon AK1 desired by the user among a plurality of icons AK1 to AK3 displayed on the display unit 4. When the element 37 is held over, the light receiving element 37 receives ID packets output from the plurality of light emitting elements 22 respectively corresponding to the plurality of pixels displaying the icon AK1.

  In this case, there is no problem when the portable memory device 3 is held by the user and the light receiving element 37 is held in front of the icon AK1, but the distance from the display screen of the display unit 4 to the portable memory device 3 is increased. If it is a problem.

  However, a focus lens (not shown) is attached to the front part of the light receiving element 37 of the portable memory device 3 so as to be movable along the longitudinal direction. As shown in FIG. The focus range can be changed in response to the lever 39 being operated in the direction of the thick arrow.

  Therefore, the portable memory device 3 receives only the ID packet of the icon AK1 even at a position away from the LCD 20 by adjusting the light receiving range when taking the ID packet from the LCD 20 as shown in FIG. Has been made to get. Incidentally, the slide lever 39 and the focus lens for adjusting the focus range are not necessarily essential elements, and are particularly necessary if the light receiving element 37 of the portable memory device 3 can be brought close to the icon AK1 of the display unit 4. is not.

  The portable memory device 3 demodulates the ID packet received by the light receiving element 37 by the receiving unit 31, decodes it by the encoding / decoding unit 32, and performs parity check so as to obtain original ID information if it is valid data. Is transmitted to the control unit 33 having a CPU configuration.

  The control unit 33 generates the acquisition request data of the file data associated with the icon AK1 based on the ID information, encodes the acquisition request data by the encoding / decoding circuit 32, and modulates the acquisition request data by the transmission unit 35. Then, infrared transmission is performed from the infrared transmission unit 38 toward the display unit 4 of the personal computer 2 as an infrared command. However, the portable memory device 3 may wirelessly transmit the income request data not by an infrared command but by a wireless communication method such as Bluetooth Module (registered trademark) or IEEE (Institute of Electrical and Electronics Engineers) 802.11g. good.

  In the display unit 4 of the personal computer 2, infrared receiving units 23 are arranged at predetermined intervals around the plurality of light emitting elements 22 provided in the backlight unit 21, and infrared transmission is performed from the portable memory device 3. The received infrared command is received by the infrared receiver 23 and sent to the demodulation circuit 16 of the main unit 5.

  The demodulating circuit 16 demodulates the infrared command and decodes it by the decoding circuit 17 to restore the original acquisition request data, and sends it to the control circuit 10. The control circuit 10 responds to the acquisition request by reading the two-dimensional coordinates corresponding to the ID information based on the acquisition request data and referring to the coordinate related data correspondence table 18 of the storage unit 11 based on the two-dimensional coordinates. Identify and read file data.

  The control circuit 10 packetizes the file data with the encoding circuit 13, modulates the file packet with the modulation circuit 14, and then uses the LED array driver 15 with the plurality of backlight units 21 corresponding to the icon AK 1 according to the modulation result. Each light emitting element 22 is switched at high speed so that a file packet can be optically transmitted from the icon AK1 portion of the display screen of the LCD 20 using visible light as a medium.

  At this time, the light emitting element 22 of the backlight unit 21 is adapted to carry file packet data for on / off switching according to the high-speed switching operation, but at this time, the original function of the backlight light source is not impaired. In this way, the data signal sequence is modulated so that the ON time per predetermined unit time does not fluctuate rapidly. Thereby, the light emitting element 22 of the backlight unit 21 is configured to keep the luminance level of the display unit 4 constant and prevent the image quality from deteriorating.

  Incidentally, if the data modulation method as described above is used, the luminance level of the display unit 4 can be held at an arbitrary value for each light emitting element 22. By utilizing this characteristic, a modulation method having a high duty ratio is applied to the light emitting element 22 that handles brightness according to the light and dark portions of the image content displayed on the display unit 4, and the duty ratio is applied to the light emitting element 22 that handles the dark part. It is also possible to perform a synchronization process such as applying a modulation method with a low ratio. As a result, the display unit 4 can be expected to have the effect of improving darkness whitening, which is a drawback of the LCD 20, and improving the image quality by increasing the contrast of the display image.

  At this time, for the icons AK2 and AK3 other than the icon AK1, as usual, ID packets based on ID information respectively associated with the plurality of light emitting elements 22 corresponding to the icons AK2 and AK3 are always output. .

  By the way, there are a plurality of light emitting elements 22 of the backlight unit 21 corresponding to the icon AK1, and file data associated with the icon AK1 is optically transmitted from the plurality of light emitting elements 22, and at this time, an area corresponding to the icon AK1 is displayed. By setting each light emitting element 22 as an independent channel, the file data can be transmitted in parallel toward the portable memory device 3.

  Specifically, as shown in FIG. 4, the personal computer 2 changes the frequency of light generated by each of the plurality of light emitting elements 22 included in the region corresponding to the icon AK1, thereby generating the light from the plurality of light emitting elements 22. By implementing frequency division communication so that the received light does not interfere with each other, file data can be transmitted in parallel. At this time, the portable memory device 3 may receive the file data optically transmitted from each channel independently through the band-pass filter corresponding to the frequency-divided channel.

  At this time, the personal computer 2 can also be multi-channeled in a state where the R, G, and B LEDs constituting the light emitting elements 22 are separated into R, G, and B components and wavelength-separated. In this case, the portable memory device 3 can receive file data as independent channels via optical wavelength separation filters that can separate R, G, and B components, respectively.

  Therefore, the personal computer 2 can increase the number of channels by performing wavelength division communication in addition to frequency division communication, and thus can optically transmit file data to the portable memory device 3 at high speed.

  In addition, the personal computer 2 emits light while sequentially shifting a plurality of light emitting elements 22 as shown in FIG. 5, thereby realizing time division communication so that adjacent light emitting elements 22 do not interfere with each other and transmitting file data in parallel. Has been made to get.

  The personal computer 2 can also transmit file data in parallel while preventing communication interference between the light emitting elements 22 by combining frequency division communication and time division communication. By combining these, it is possible to transmit file data in parallel while preventing communication interference between the light emitting elements 22.

  As a result, the portable memory device 3 receives the data of the file packet output from the icon AK1 by the light receiving element 37, demodulates it by the receiving unit 31, decodes it by the encoding / decoding unit 32, and performs a parity check. Thus, the original file data is restored, and this file data is sent to the control unit 33.

  The control unit 33 can store the file data in the storage unit 34 such as a non-volatile memory. Thus, the file data can be acquired without contact from the icon AK1 displayed on the display unit 4 of the personal computer 2. It is made so that it can be saved.

  A non-contact data communication processing sequence performed between the personal computer 2 and the portable memory device 3 will be described again using the sequence chart of FIG. In step SP1, the control circuit 10 of the personal computer 2 acquires the two-dimensional coordinates of the icon AK1 displayed on the display unit 4, and proceeds to the next step SP2.

  In step SP2, the control circuit 10 of the personal computer 2 associates the two-dimensional coordinates on the display screen corresponding to the icon AK1 displayed on the display unit 4 with the file data associated with the two-dimensional coordinates. The related data correspondence table 18 is generated, and using this, the coordinate related data correspondence table on the past display screen is updated to the new coordinate related data correspondence table 18, and the process proceeds to the next step SP3.

  In step SP3, the control circuit 10 of the personal computer 2 generates an ID packet based on the ID information of the plurality of light emitting elements 22 associated with the icon AK1, modulates it, and then uses the LED array driver 15 to generate a backlight unit. By causing each of the 21 light emitting elements 22 to perform a high-speed switching operation, an ID packet is transmitted from the area corresponding to the icon AK1, and the process proceeds to the next step SP4.

  At this time, when the light receiving element 37 is held over the user desired icon AK1 among the plurality of icons AK1 to AK3 displayed on the display unit 4 in step SP21, the control unit 33 of the portable memory device 3 displays the icon AK1. The light receiving element 37 receives the ID packet light-output from the plurality of light emitting elements 22 corresponding to the plurality of pixels displaying “” and proceeds to the next step SP22.

  In step SP22, the control unit 33 of the portable memory device 3 determines whether or not the ID packet is legitimate ID information by demodulating and decoding the ID packet received by the light receiving element 37 and performing a parity check. Is obtained, the process returns to step SP21 to receive the ID packet again.

  On the other hand, if the control unit 33 of the portable memory device 3 determines in step SP22 that the ID information is valid as a result of the parity check, it obtains an affirmative result and proceeds to the next step SP23.

  In step SP23, the control unit 33 of the portable memory device 3 generates the acquisition request data of the file data associated with the icon AK1, encodes and modulates it, and then transmits the infrared command as an infrared command from the infrared transmission unit 38 to the personal computer. After the infrared transmission to the display unit 4 of No. 2, the process proceeds to the next step SP24.

  At this time, in step SP5, the control circuit 10 of the personal computer 2 receives the infrared command transmitted from the portable memory device 3 by the infrared receiver 23, and proceeds to the next step SP6.

  In step SP6, the control circuit 10 of the personal computer 2 reads the two-dimensional coordinates corresponding to the ID information based on the original acquisition request data restored by demodulating the infrared command, and coordinates-related data based on the two-dimensional coordinates. By referring to the correspondence table 18, the file data corresponding to the acquisition request is specified and read, and the process proceeds to the next step SP7.

  In step SP7, the control circuit 10 of the personal computer 2 packetizes the file data by the encoding circuit 13, modulates the file packet, and then uses the LED array driver 15 in the area corresponding to the icon AK1 according to the modulation result. By causing each light emitting element 22 in the backlight unit 21 to perform high-speed switching operation, the file packet data is optically output from the icon AK1 portion using visible light as a medium, and the process proceeds to the next step SP8.

  At this time, the control unit 33 of the portable memory device 3 receives the data of the file packet output from the icon AK1 by the light receiving element 37 in step SP24, and in the next step SP25, the file packet is demodulated and decoded. At the same time, it is determined whether or not the original file data has been correctly restored by performing a parity check. If a negative result is obtained, the process returns to step SP24 and the light receiving element 37 receives the data of the file packet again.

  On the other hand, if an affirmative result is obtained in step SP25, the control unit 33 of the portable memory device 3 can correctly restore the original file data, so the process proceeds to the next step SP26 to receive the file data for one packet. After transmitting the ACK signal indicating the end to the display unit 4 of the personal computer 2 by infrared rays, the process proceeds to the next step SP27.

  In step SP27, the control unit 33 of the portable memory device 3 determines whether or not it is EOF (End Of File) by reading from the header added to the file packet. This means that the data has not been received. At this time, the control unit 33 of the portable memory device 3 returns to step SP24 and continues the file packet reception process.

  On the other hand, if an affirmative result is obtained in step SP27, this means that all the file data related to the icon AK1 has been received, and at this time, the control unit 33 of the portable memory device 3 performs the next step SP28. To end the process.

  At this time, in step SP8, the control circuit 10 of the personal computer 2 detects whether or not the ACK signal transmitted by infrared from the control unit 33 of the portable memory device 3 is received, so that the response from the portable memory device 3 is received. If a negative result is obtained, the process returns to step SP7 and the file packet is continuously output by the light emitting element 22 of the icon AK1 portion.

  On the other hand, if an affirmative result is obtained in step SP8, it is determined that there is a response from the portable memory device 3 because the ACK signal transmitted by infrared from the control unit 33 of the portable memory device 3 is received. The process proceeds to step SP9.

  In step SP9, the control circuit 10 of the personal computer 2 determines whether or not the EOF has been read from the header added to the file packet of the file data being transmitted, and if a negative result is obtained, the process proceeds to step SP7. The packet transmission is continued. If an affirmative result is obtained, the process proceeds to the next step SP10 to end the file packet transmission.

  By the way, the portable memory device 3 (FIG. 2) has a transmission / reception switching unit 36. By switching to the data transmission mode via the transmission / reception switching unit 36, various data stored in the storage unit 34 are stored. Optical output can be made to the personal computer 2.

  Specifically, the portable memory device 3 switches the infrared light by the infrared transmission unit 38 at a high speed according to the data to be transmitted, so that the data is transmitted to the infrared reception unit in the display unit 4 of the personal computer 2. 23 can be optically transmitted. Note that the portable memory device 3 may transmit light using visible light instead of infrared light.

  Therefore, in the contactless data communication system 1, data can be optically transmitted from the personal computer 2 to the portable memory device 3, and data can be optically transmitted from the portable memory device 3 to the personal computer 2, and thus the personal computer 2 and the portable computer 3 can be optically transmitted. Bidirectional contactless data communication with the type memory device 3 can be realized.

(3) Operation and Effect In the above-described configuration, in the non-contact data communication system 1, the personal computer 2 can be obtained only by holding the icon AK1 displayed on the display unit 4 of the personal computer 2 by the tip of the portable memory device 3. And the portable memory device 3 communicate with each other in a non-contact manner via the display screen of the display unit 4, and the file data related to the icon AK1 is automatically acquired in the portable memory device 3 and stored in the internal storage unit 34. Can be saved.

  That is, in the non-contact data communication system 1, no special alignment is required by merely bringing the tip of the portable memory device 3 close to the icon AK1 displayed on the display unit 4 of the personal computer 2 and holding the light receiving element 37. The file data related to the icon AK1 can be directly acquired from the icon AK1 without contact.

  Therefore, unlike the conventional case, the icon AK1 is not forced to be dragged and dropped to transfer the data to a USB (Universal Serial Bus) memory after the file is opened by selecting the icon AK1 with the cursor, and the icon AK1. The file data can be acquired instantly and easily only by an intuitive operation such as holding the tip of the portable memory device 3 over.

  In particular, in the non-contact data communication system 1, since different file data is associated with the plurality of icons AK1 to AK3 displayed on the display unit 4 by the personal computer 2, a plurality of portable memory devices 3 are communicated. When the first portable memory device 3 selects and holds the icon AK1 displayed on the display unit 4, the second portable memory device 3 selects and holds the icon AK2 over the icon AK3. When the third portable memory device 3 is selected and held over, the file data associated with each of the icons AK1 to AK3 can be simultaneously optically transmitted to the plurality of portable memory devices 3.

  In the non-contact data communication system 1, the plurality of light emitting elements 22 corresponding to the icon AK1 displayed on the display unit 4 of the personal computer 2 are used as independent channels, so that file data related to the icon AK1 can be stored. Since parallel transmission to the portable memory device 3 is possible, even large-capacity file data can be transferred to the portable memory device 3 in a short time.

  According to the above configuration, in the non-contact data communication system 1, the user-desired icon AK 1 is selected from the icons AK 1 to AK 3 displayed on the display unit 4 of the personal computer 2 and the light receiving element of the portable memory device 3. The file data associated with the position of the icon AK1 on the display screen can be directly acquired from the display screen of the display unit 4 to the portable memory device 3 in a non-contact manner only by an intuitive and simple operation such as holding 37. Can be remembered.

(4) Other Embodiments In the above-described embodiment, the case where the portable memory device 3 is used as the data receiving device constituting the contactless data communication system 1 has been described. However, the remote controller 50 may be used instead of the portable memory device 3 as in the non-contact data communication system 100 as shown in FIG.

  In this case, the remote controller 50 is not only used as a remote control for the personal computer 2 but also displayed on the display unit 4 by a light receiving element (not shown) made of a photodiode provided at the tip. In addition to receiving ID packets and file packets output from a plurality of light emitting elements 22 corresponding to a user desired icon AK1 among the plurality of icons AK1 to AK3, for example, an EPG ( For example, detailed information about the program is received from a plurality of light emitting elements 22 corresponding to the program icon BA of 7:00 to 8:00 on August 2, which is displayed on the Electronic Program Guide) screen, and is displayed on the simple display unit 51. The contents can be displayed.

  In this case, the remote controller 50 displays the detailed information of the program on the simplified display unit 51 and does not have to display the detailed information on the display unit 4 of the personal computer 2, so the EPG screen of the display unit 4 is displayed based on the detailed information of the program icon BA. It is designed to prevent it from being hidden. The remote controller 50 is also provided with a slide lever 52 for changing the focus range in the same manner as the portable memory device 3.

  In this case, if the remote controller 50 optically communicates with an authentication icon (not shown) displayed on the display unit 4 by the light receiving element, only the remote controller 50 owned by a legitimate user is used. Since the optical communication access authority can be given to the network, the security can be improved.

  In the above-described embodiment, the case where the portable memory device 3 receives and acquires the file data related to the icon AK1 of the display unit 4 has been described. However, the present invention is not limited to this. As shown in FIG. 9, the portable memory device 3 receives and acquires the play command, the pause command, and the stop command related to the play button PL, the pause button PZ, and the stop button ST displayed on the display unit 4. May be.

  In this case, if the portable memory device 3 has a playback function, the portable memory device 3 itself does not have a play button, a pause button, a stop button, etc., as shown in FIG. In addition, it is possible to indirectly perform reproduction control, pause control, and stop control of the portable memory device 3 from the play button PL, the pause button PZ, and the stop button ST displayed on the display unit 4 of the personal computer 2. .

  As shown in FIG. 11, the portable memory device 3 transmits a playback button PL, a playback command acquired from the pause button PZ or the stop button ST, a pause command, and a stop command displayed on the display unit 4 of the personal computer 2. The unit 35 and the infrared transmission unit 38 can also perform infrared transmission to a predetermined playback device 70 connected to the display unit 4, and in this case, can also be used as a remote controller.

  Further, in the above-described embodiment, the case where the portable memory device 3 acquires file data from the icon AK1 of the image displayed on the display unit 4 of the personal computer 2 has been described. Not limited to this, an image based on data read from the main unit 5 may be displayed on a screen by a projector, and file data may be indirectly acquired from an icon of the image displayed on the screen.

  Furthermore, in the above-described embodiment, the case where the light emitting element 22 made of a visible light LED is used has been described. However, the present invention is not limited to this, and a light emitting element such as an infrared LED other than visible light is used. You may do it.

  Further, in the above-described embodiment, the case where the light emitting elements 22 correspond to each pixel constituting the LCD 20 on a one-to-one basis has been described, but the present invention is not limited to this and constitutes the LCD 20. One light emitting element 22 may correspond to a plurality of pixels.

  Furthermore, in the above-described embodiment, the portable memory device 3 transmits the acquisition request data generated based on the ID information received from the icon AK1 of the display unit 4 to the personal computer 2 as an infrared command by infrared transmission to the icon AK1. Although the case where related file data is acquired has been described, the present invention is not limited to this, and the icon AK1 is selected when the icon AK1 is selected on the screen via a touch panel provided on the screen of the display unit 4. The personal computer 2 may be made to recognize that there has been a request for acquiring file data related to AK1, and the file data may be acquired from the icon AK1.

  Furthermore, in the above-described embodiment, the case where the two-dimensional image displayed on the display unit 4 is the target has been described. However, the present invention is not limited to this, and the three-dimensional stereoscopic display image or one-dimensional line is used. The display image may be a target, and it may be any image that can change the brightness of light.

  Furthermore, in the above-described embodiment, the case where the backlight unit 21 is used as the configuration of the display unit 4 has been described. However, the present invention is not limited to this, and a front light may be used.

  Furthermore, in the above-described embodiment, the case where the file data is acquired from the icon AK1 has been described. However, the present invention is not limited to this, and characters, characters, and in-screen other than the icon AK1 having an area on the screen. Alternatively, moving images, still images, text data, or audio data may be acquired from a small window.

  For example, in the non-contact data communication system 1, when the light receiving element 37 of the portable memory device 3 is held over an artist character displayed on the display unit 4, an audio file optically transmitted from the character is instantaneously acquired. Therefore, if the portable memory device 3 is applied to a portable music player, it is possible to instantaneously take in an audio file of music from the personal computer 2 by an intuitive operation.

  In the non-contact data communication system 1, when the light receiving element 37 of the portable memory device 3 is held over the bilingual broadcasting icon displayed on the display unit 4, the audio data optically transmitted from the icon is portable. It can be acquired and stored in the memory device 3.

  Furthermore, in the non-contact data communication system 1, a light receiving element having a directivity and an adjustable light receiving range is provided on the front surface of the rear speaker constituting the home theater, and the sound data optically transmitted from the display screen of the display unit 4 is provided. Is obtained by the light receiving element of the rear speaker and output from the speaker. In this case, a cable for the rear speaker can be eliminated.

  Furthermore, in the above-described embodiment, the case where the light receiving element 37 made of a photodiode provided at the tip of the portable memory device 3 is used has been described. However, the present invention is not limited to this, and instead of the photodiode. Alternatively, a CCD camera may be used.

  Further, in the above-described embodiment, the case where the portable memory device 3 is applied as the data receiving device has been described. However, the present invention is not limited to this, and a mobile phone is applied as the data receiving device. In that case, the mobile phone can directly acquire and charge electronic money data from the icon displayed on the display unit of the ATM (Automatic Teller Machine) machine, and the terminal of the CD (Compact Disc) shop The mobile phone can directly acquire the CD content from the icon or the like in the image displayed on the display unit.

  The contactless data communication system, display device, data reception device, contactless data transmission method, and data reception method of the present invention can be applied to various uses for directly acquiring data without contact from the display screen of the display device, for example. it can.

It is a rough-line perspective view which shows the general | schematic structure of the non-contact data communication system of this invention. It is a rough-line block diagram which shows the circuit structure of a non-contact data communication system. It is an approximate line figure used for explanation of a light reception range. It is an approximate line figure used for explanation of parallel transmission by frequency division. It is a basic diagram with which it uses for description of the parallel transmission by a time division. It is a sequence chart with which it uses for description of a non-contact data communication processing sequence. It is a rough-line perspective view which shows the general-view structure of the non-contact data communication system in other embodiment. It is a basic diagram which shows a program schedule. It is a basic diagram with which it uses for description of the data transmission / reception object (1) in other embodiment. It is a basic diagram with which it uses for description of the data transmission / reception object (2) in other embodiment. It is a basic diagram with which it uses for description of the data transmission / reception object (3) in other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Non-contact data communication system, 2 ... Personal computer, 3 ... Portable memory device, 4 ... Display part, 5 ... Main part, 10 ... Control circuit, 11, 34 ... Memory | storage part, 12 ...... Display control circuit, 13 ... Encoding circuit, 14 ... Modulation circuit, 15 ... LED array driver, 16 ... Demodulation circuit, 17 ... Decoding circuit, 18 ... Coordinate-related data correspondence table, 20 ... ... LCD, 21 ... Backlight, 22 ... Light emitting element, 23 ... Infrared receiving part, 31 ... Light receiving part, 32 ... Encoding / decoding part, 33 ... Control part, 35 ... Transmitting part , 36... Transmission / reception changeover switch, 37... Light receiving element, 38... Infrared transmission unit, 39, 52... Slide bar, 50.

Claims (22)

A display device that superimposes predetermined transmission data associated with a position on the display screen by using a luminance change of light generated from the display screen by a light-emitting element capable of high-speed switching used as a light source of the display screen;
And a data receiving device for acquiring and storing the transmission data superimposed in association with the position on the display screen by receiving the change in luminance of the light with a predetermined light receiving element. A contactless data communication system. The display device includes the light receiving element in addition to the light emitting element, and the data receiving device includes the light emitting element in addition to the light receiving element, so that both the display device and the data receiving device can be used. The contactless data communication system according to claim 1, wherein the contactless data communication is performed in the direction. The non-contact data according to claim 2, wherein the data receiving device comprises: light emitting means for irradiating a light signal with directivity to a part of the display screen of the display device. Communications system. The non-contact data according to claim 1, wherein the data receiving device acquires the transmission data superimposed in association with a position on the display screen of an object displayed on the display screen. Communications system. 2. The non-contact method according to claim 1, wherein the data receiving device comprises: a selecting unit that selects a position on the display screen by arbitrarily selecting pixels constituting the display screen. 3. Data communication system. 6. The non-contact data communication system according to claim 5, wherein the selection means comprises: selecting the light emitted from a pixel in a desired region in the display screen by adjusting a light receiving range. The contactless data communication system according to claim 5, wherein the selection unit includes: selecting the light emitted from a pixel in a desired region in the display screen according to a touch operation on the touch panel. The non-contact data communication system according to claim 1, wherein the data receiving device receives a change in luminance of the light indirectly through the light receiving element instead of directly from the display screen. The non-contact data communication system according to claim 1, wherein the display device performs parallel transmission of the predetermined transmission data using an independent channel for each pixel in the display screen. The non-contact data communication system according to claim 9, wherein the display device uses the independent channel by frequency-separating the light for each pixel. The non-contact data communication system according to claim 9, wherein the display device sets the independent channels by time-division outputting the light for each pixel. A display screen;
A light-emitting element capable of high-speed switching used as a light source of the display screen;
Data superimposing means for superimposing predetermined transmission data associated with a position on the display screen using a luminance change of light generated from the display screen by the light emitting element;
The light-emitting element performs high-speed switching based on the transmission data associated with the position of the display screen, and changes the luminance of light generated from the display screen, whereby predetermined data that is a communication target of non-contact data communication A display device characterized by optically transmitting the transmission data to a receiving device. The display device
13. The display device according to claim 12, further comprising channel separation means for performing parallel transmission of the predetermined transmission data using an independent channel for each pixel on the display screen. The channel separation means is
The display device according to claim 13, wherein the independent channel is obtained by frequency-separating the light for each pixel. The channel separation means is
The display device according to claim 13, wherein the independent channel is obtained by time-division outputting the light for each pixel. Receives a change in luminance of light when predetermined transmission data associated with the position of the display screen is superimposed on light generated from the display screen by a light-emitting element capable of high-speed switching used as a light source of the display screen A light receiving element that
Data restoration means for restoring and acquiring the transmission data superimposed in association with the position of the display screen based on the luminance change of the light received by the light receiving element;
And a data storage means for storing the transmission data acquired by the data restoration means. The data restoration means is
The data receiving apparatus according to claim 16, wherein the data is acquired by restoring the transmission data superimposed in association with the position of the object displayed on the display screen on the display screen. The data receiving device is:
17. The data receiving apparatus according to claim 16, further comprising selection means for selecting a position on the display screen by arbitrarily selecting pixels constituting the display screen. The data receiving device is:
The data receiving device according to claim 16, further comprising: a light emitting unit that emits an optical signal in a state of directivity with respect to a part of the display screen of the display device. The data receiving device according to claim 16, wherein the light receiving element receives the luminance change of the light indirectly from the display screen instead of directly. A light generation step of generating light from the display unit by a light-emitting element capable of high-speed switching used as a light source of a display screen;
Non-contact data communication communication is performed by performing high-speed switching based on predetermined transmission data associated with a position on the display screen, and superimposing the transmission data using a luminance change of light generated from the display screen. A non-contact data transmission method comprising: a data transmission step of optically transmitting the transmission data to a predetermined data receiving device as a target. Receives a change in luminance of light when predetermined transmission data associated with the position of the display screen is superimposed on light generated from the display screen by a light-emitting element capable of high-speed switching used as a light source of the display screen Receiving step to
A data restoration step for restoring and acquiring the transmission data superimposed in association with the position of the display screen based on a change in luminance of the light received by the light receiving element;
And a data storage step of storing the transmission data acquired in the data restoration step in a predetermined data storage means.

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