JP2005338390A - Display apparatus, display system, display method of display apparatus, and electronic book - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a picture screen being rewritten from being looked by a viewer by rewriting the picture screen displayed on the back side observed from the viewer because time may be required for rewriting the picture screen in a display apparatus such as an electrophoresis apparatus. <P>SOLUTION: The display apparatus 2 is provided with two display parts formed on both sides, a recognition means for recognizing the surface turned to the viewer 1 side and a display control means for updating the display contents of the display part of the side which is not turned to the viewer 1 side out of the two display parts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device, a display system, a display method for the display device, and an electronic book. For example, the present invention relates to a display device such as an electronic paper, an electronic book, or a portable information terminal.

  Conventionally, in display devices such as electronic paper, electronic books, and portable information terminals, a display device using a display element such as an electrophoresis method or an electrolytic deposition method that maintains a display state even after the power is turned off. There is.

  As an electrophoretic display device, for example, there is a display device in which a dispersion system in which electrophoretic particles are dispersed in a dispersion medium is enclosed in microcapsules, and the microcapsules are arranged between electrode plates (for example, , See Patent Document 1).

  FIG. 7 is a conceptual cross-sectional view of a main part of a conventional display device having a configuration in which microcapsules are arranged between electrode plates.

  A large number of microcapsules 73 are arranged between the transparent electrodes 72 formed on the opposing surfaces of the transparent member 71 made of a pair of glass plates or the like. Each microcapsule 73 encloses a dispersion system 75 in which electrophoretic particles 74 are dispersed in a dispersion medium. The gap between the microcapsules 73 and the gap between the microcapsule 73 and the transparent electrode 72 are filled with a substance 77 having a refractive index and a volume resistivity substantially equal to those of the microcapsule 73 through the injection hole 76. Yes. Reference numeral 78 denotes an end sealing material.

In the display device configured as described above, the electrophoretic particles 74 in the dispersion medium in the microcapsule 73 move according to the polarity between the two transparent electrodes 72 facing each other. By controlling the polarity between the two transparent electrodes 72 so that the electrophoretic particles 74 are attracted to or separated from the one transparent electrode 72 side, a desired character, symbol, figure, or the like can be displayed.
JP-A 64-86116

  However, a conventional display device having a display element that maintains a display state even after the power is turned off has a problem that it takes time to rewrite due to a slow response speed. Therefore, when the display contents are rewritten, the user has to wait until the rewriting process is completed before viewing the new display contents.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a display device, a display system, a display device display method, and an electronic book that do not cause a user to wait at the time of display update.

In order to solve the above-described problem, the first aspect of the present invention provides:
Two displays on both sides,
A recognition means for recognizing the side facing the referrer side,
A display device comprising: a display control unit configured to update a display content of a display portion of the two display portions that is not suitable for a reference side when updating the display content on the display portion. .

The second aspect of the present invention
The recognizing means has antennas arranged on both sides at least one by one, and compares the reception intensity received by each antenna of electromagnetic waves transmitted from a transmitter attached to the upper body of a reference person. The display device according to the first aspect of the present invention recognizes a surface on which a weak antenna is disposed as a surface not facing the reference side.

The third aspect of the present invention provides
The transmitting device transmits unique ID data,
Furthermore, an ID detection means for detecting ID data from the electromagnetic wave received by the antenna is provided,
The display control means is the display device according to the second aspect of the present invention, which updates the display content of the display section only when the ID data detected by the ID detection means is a predetermined value.

The fourth invention relates to
A transmitting device that can be worn by a reference and transmits unique first ID data by a wireless transmission method;
A server device that transmits unique second ID data by a wireless transmission method, and selects display data as necessary and transmits the wireless data by a wireless transmission method;
A display that displays the display data only when the first ID data, the second ID data, and the display data are received and the first ID data and the second ID data have predetermined values. And a display system.

The fifth aspect of the present invention relates to
The display device
At least two independent display parts on both sides,
At least two independent antennas for receiving electromagnetic waves transmitted from the transmission device;
Recognizing means for comparing the reception intensity of the electromagnetic wave received by each of the antennas and recognizing the surface on which the antenna with low reception intensity is arranged as the surface not facing the reference side,
4th this invention which has the display control means which updates the display content of the display part of the side which is not suitable for the referer | side of the two display parts when updating the display content to the said display part. Display system.

The sixth invention relates to
Recognizing the side of the two sides facing the referrer side,
A display method of a display device, comprising: a step of updating display contents of a display unit disposed on a surface not facing the reference side of the two display units disposed on each of the both surfaces. is there.

The seventh invention relates to
It is an electronic book provided with the display apparatus of the 1st thru | or 3rd this invention which has a display part using an electrophoresis system.

The eighth invention relates to
A program for causing a computer to function as the display control means of the display device according to any one of the first to third aspects of the present invention.

The ninth invention relates to
A recording medium carrying the program of the eighth aspect of the present invention, which is a recording medium that can be used by a computer.

  According to the present invention, it is possible to provide a display device, a display system, a display method of the display device, and an electronic book that do not make the user wait for display update.

  Hereinafter, a display device of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a usage pattern of the display system in Embodiment 1 of the present invention.

  The referrer 1 is wearing the upper body by a method such as putting the transmitting device 10 in a pocket or using a pendant, and refers to the content displayed on the display device 2 held in the hand. Then, the transmission device 10 transmits the unique first ID data to the outside by wireless communication.

  On the other hand, the server device 3 transmits unique second ID data to the outside by wireless communication. Further, the server device 3 stores display data such as image information and character information therein, selects display data as necessary, and transmits the display data by a wireless transmission method.

  FIG. 2 is a schematic view showing the appearance of the display device 2.

  The first antenna 4a, the first display control means 5a, the first display means 6a, and the control means 7 are provided on the surface shown in FIG. Then, on the opposite surface of the display device 2 not shown in FIG. 2, the second antenna 4b is provided in the same manner as the first antenna 4a, the first display control means 5a, and the first display means 6a. Second display control means 5b and second display means 6b are provided. The first display unit 6a and the second display unit 6b are an example of two display units of the present invention.

  Next, the operation of the display system according to the first embodiment will be described with reference to FIGS. 1 and 2.

  The display device 2 receives the first ID data transmitted from the transmission device 10 and the second ID data and display data transmitted from the server device 3. In that case, the control means 7 compares the intensity | strength of the electromagnetic wave received with the 1st antenna 4a and the 2nd antenna 4b of the 1st ID data transmitted from the transmitter 10. FIG.

  In FIG. 1, if the surface on which the first antenna 4a is attached faces the transmitter 10 side, that is, the reference person 1 side, the intensity of the radio wave received by the first antenna 4a is It becomes stronger than the intensity of the radio wave received by the second antenna 4b. The control means 7 compares and detects the intensity of these two radio waves, and the display data received from the server device 3 as a result is displayed on the second display means 6b via the second display control means 5b. Rewrite the contents.

  Since the first display means 6a faces the transmitter 10 side, that is, the reference person 1 side, the reference is made while the reference person 1 is viewing the information displayed on the first display means 6a. For the user 1, the display content of the second display means 6b which is the back surface is rewritten. Therefore, the reference person 1 can comfortably refer to the information displayed on the display device 2 without causing the reference person 1 to wait for the completion of the rewriting while showing the screen being rewritten.

  Further, the control means 7 refers to the received first ID data and second ID data before rewriting the display content of the second display means 6b, and when these two ID data are not predetermined values. Does not perform the rewriting operation of the second display means 6b. Therefore, only a person who wears the transmitting device 10 that transmits the predetermined first ID data can refer to the information transmitted from the server device 3 that transmits the predetermined second ID data. , Information security can be ensured.

  For example, as such a control means 7, the control means 7 that compares the first ID data and the second ID data and performs the rewriting operation of the second display means 6 b if the same value is used is used. It is possible. As another method, a non-volatile memory in which the first ID data reference value and the second ID data reference value are stored is incorporated, and the first ID data, the first ID data reference value, the second ID data reference value, It is possible to use the control means 7 which performs the rewriting operation of the second display means 6b when the ID data and the second ID data reference value are compared and matched.

  Hereinafter, a more detailed operation of the display system according to the first embodiment will be described.

  FIG. 3 shows a block diagram of the transmission device 10.

  The transmission device 10 includes a transmission antenna 11, a transmission unit 12, and an ID generation unit 13.

  The ID generation unit 13 generates first ID data unique to each individual transmission device 10 and outputs the first ID data to the transmission unit 12. Then, the transmission unit 12 wirelessly transmits the first ID data via the transmission antenna 11.

  FIG. 4 shows a block diagram of the server device 3.

  The server device 3 includes a transmission / reception antenna 30, a communication unit 31, a transmission side control unit 32, and a storage medium 33.

  The storage medium 33 stores a large number of display data that can be referred to by the display device 2, and necessary display data is selected and output to the communication unit 31 under the control of the transmission side control unit 32. The transmission-side control unit 32 communicates with the display device 2 via the communication unit 31 and the transmission / reception antenna 30. Thereafter, the transmission-side control means 32 selects necessary display data according to the content of communication with the display device 2, and displays the display data stored in the storage medium 33 via the communication means 31 and the transmission / reception antenna 30. Transfer to device 2.

  FIG. 5 shows a block diagram of the display device 2.

  Elements common to those shown in the schematic diagram of FIG. 2 are given the same numbers as in FIG. The display device 2 includes a transmission / reception antenna 20. The control unit 7 includes a communication unit 21, a reception side control unit 22, and a radio wave intensity comparison unit 23. For example, the communication unit 21, the reception side control unit 22, and the radio wave intensity comparison unit 23 may be configured by an electronic circuit, and the control unit 7 may be realized as an LSI incorporating them.

  The first ID data transmitted from the transmission device 10 is received by the radio wave intensity comparison unit 23 via the first antenna 4 a and the second antenna 4 b and is output to the reception side control unit 22. At that time, the radio wave intensity comparing means 23 compares the received radio wave intensity of the first antenna 4 a with the received radio wave intensity of the second antenna 4 b and outputs the comparison result to the receiving side control means 22. The combination of the radio wave intensity comparison means 23, the first antenna 4a, and the second antenna 4b is an example of the recognition means of the present invention.

  On the other hand, the receiving-side control means 22 communicates with the server device 3 via the communication means 21 and the transmission / reception antenna 20 and receives the second ID data. At the same time, the reception-side control means 22 transmits display data selection information transferred from the server apparatus 3 to the display apparatus 2 to the transmission-side control means 32 of the server apparatus 3 via the communication means 21 and the transmission / reception antenna 20.

  Then, the reception-side control means 22 refers to the first ID data received from the transmission device 10 and the second ID data received from the server device 3, and only when these are respective predetermined values. The display data is acquired from the server device 3 and displayed. The receiving side control means 22 is an example of the ID detection means of the present invention.

  There are many possible methods for the reference person 1 to input the selection information of the display data to be referred to the receiving side control means 22. For example, there has been proposed a method of detecting the deflection of the image display means and displaying the image data by returning the page or turning the page according to the deflection. Here, the selection method of the display data is not the essence of the present invention and will not be described further.

  Next, based on the comparison result input from the radio field intensity comparison unit 23, the reception side control unit 22 displays the display content of the display unit arranged on the same surface as the antenna having the weak reception radio field intensity from the server device 3. Control to update and display the received display data. The receiving side control means 22 is an example of the display control means of the present invention.

  Display data received by the communication means 21 from the server device 3 via the transmission / reception antenna 20 is output to the first display control means 5a and the second display control means 5b. Here, in the same way as described above with reference to FIGS. 1 and 2, when the surface on which the first antenna 4 a is attached faces the transmitting apparatus 10 side, As for the transmitted radio wave, the intensity of the radio wave received by the first antenna 4a is higher than the intensity of the radio wave received by the second antenna 4b.

  The radio wave intensity comparison means 23 compares and detects the intensity of these two radio waves, and outputs the result to the reception side control means 22. In this case, the reception-side control means 22 controls the second display control means 5b arranged on the same surface as the second antenna 4b having a weak received radio wave intensity, and the display input from the communication means 21 The data is displayed on the second display means 6b.

  Thereafter, when the reference person 1 turns over the display device 2 and refers to the second display means 6b, the second antenna 4b is now directed toward the transmission device 10. Therefore, the comparison result of the radio wave intensity comparison means 23 is inverted. The receiving side control means 22 receives the inversion of the comparison result, communicates with the server device 3, and causes the first display means 6a to display the display data to be displayed next.

  At this time, the unit in which the image data can be displayed on the display means at one time is set as one page data, and the server apparatus 3 stores a configuration in which a plurality of page data is arranged. Every time the comparison result of the radio wave intensity comparison means 23 is inverted. When the next page data is displayed in order from the top, the operation that the back side is rewritten to the next page while the referrer 1 refers to the page on the front side of the display device 2 is performed. become.

  Note that the display order of pages, and whether display data is handled in units of pages are not the essence of the present invention. Each time the referrer 1 turns the display device 2 upside down, data several pages ahead or several pages behind can be displayed, or only part of the display data can be updated.

  FIG. 6 is a conceptual diagram showing a cross section of an example of the display device 2 that can be referred to from both the front and back sides.

  The display device 2 includes a first display means 6a, a second display means 6b, and a substrate 8 of the entire display device 2, and FIG. 6 shows a sectional view thereof. Each of the first display means 6a and the second display means 6b includes a back plate 40, a back electrode 41, a transparent electrode 45, a transparent substrate 46, and a microcapsule 47, and the microcapsule 47 has a black color. Charged particles 42, oil 43, and white charged particles 44 are enclosed.

  The first display means 6a encloses oil particles 43 in which black charged particles 42 and white charged particles 44 are dispersed in a microcapsule 47, and the microcapsule 47 is back plate on which a back electrode 41 is wired. 40 and a transparent substrate 46 on which a transparent electrode 45 is wired. The back electrode 41 and the transparent electrode 45 are wired in a matrix, and a desired electric field can be applied to a desired intersection of the matrix from the first display control means 5a.

  Assume that the black charged particles 42 are positively charged and the white charged particles 44 are negatively charged. At this time, in the first display means 6a, when an electric field is applied to a specific portion so that the transparent electrode 45 is positive and the back electrode 41 is negative, in the microcapsule 47 positioned therebetween, white charged particles Since 44 migrates to the transparent electrode 45 side and the black charged particles 42 migrate to the back electrode 41 side, this portion looks white from the transparent substrate 46 side. When an electric field is applied to another part so that the transparent electrode 45 is negative and the back electrode 41 is positive, this part appears black from the transparent substrate 46 side. In this way, by controlling the electric field between the transparent electrode 45 and the back electrode 41, an image can be displayed on the transparent substrate 46 side.

  The second display means 6b has a configuration in which the first display means 6a is turned upside down around the substrate 8 of the entire display device 2, and the second display control is the same as the first display means 6a. By applying an electric field from the means 5b, an image can be displayed on the transparent substrate 46 side.

  These display states are maintained even when the applied electric field disappears. However, since a certain time is required for the white charged particles 44 and the black charged particles 42 to migrate, it takes time to rewrite the display image. It takes.

  In the first embodiment, recognizing that the display device 2 is turned over and rewriting the display content of the display means on the back side that is far from the reference person 1, After the state in which 2 is turned upside-down is maintained to some extent, the display content of the display means on the reverse side may be rewritten. For example, after the flipped state has been maintained for a predetermined time, for example, 5 seconds, the display content of the display means on the reverse side is rewritten.

  By doing so, for example, even if the referrer 1 flips the display device 2 and immediately turns it over again to check the original display content, the original display content before rewriting is confirmed. can do. Even if it is determined that the angle with which the display device 2 of the reference person 1 is temporarily changed and the display device 2 is temporarily turned over, the surface on the side referred to by the reference person 1 is mistaken. It is possible to prevent rewriting.

  As described above, in the first embodiment, in the display device 2 that can be displayed on both the front and back surfaces, the information on the surface opposite to the surface that is referred to by the reference person 1 is rewritten, so It is possible to provide the display device 2 that can refer to information comfortably without waiting for completion of rewriting while showing the screen. Further, the transmission device 10 is worn by controlling whether or not display can be performed by the consistency of ID data among the transmission device 10, the server device 3, and the display device 2 worn by the reference person 1. Only the person who has been able to refer to the information can ensure the security of the information.

  Although the electrophoretic method is used as the display means in the first embodiment, the present invention is not limited to this, and an electrolytic deposition method or a liquid crystal display method may be used. Further, although the description has been made using the monochrome display means, a color display means may be used.

  In the first embodiment, the server apparatus 3 is configured to store the display data in the storage medium 33. However, instead of the storage medium 33, the server apparatus 3 is provided with a reception function for receiving display data from the outside. The display data may be relayed and transmitted such that the display data received from is transmitted to the display device 2. In this case, the method of receiving from the outside may be any method regardless of wireless or wired.

  Further, the display device 2 may be provided with means for storing display data such as a storage medium, and the server device 3 may be omitted. Also in this case, the display means on the side opposite to the reference by the reference can be rewritten according to the intensity of the radio wave received from the transmission device 1. Therefore, it is possible to obtain the same effect that the reference 1 does not wait for completion of rewriting while showing the screen during rewriting.

  In the first embodiment, the surface of the display device 2 on the side of the reference person 1 is recognized based on the reception intensity of the electromagnetic wave transmitted from the transmission device 10. Other methods may be used as long as they can be recognized. For example, the transmitting device 10 may emit infrared light instead of electromagnetic waves, and the display device 2 may be provided with infrared light receiving elements on both sides so that the surface of the display device 2 on the side of the reference 1 is recognized. Good.

  In addition, by providing the electronic paper, electronic book, portable information terminal, etc. with the display device of the present invention, it is possible to realize an electronic paper, electronic book, portable information terminal, etc. that does not make the user wait for display update. it can.

  The program of the present invention is a program for causing a computer to execute the function of the display control means of the display device of the present invention described above, and is a program that operates in cooperation with the computer.

  The recording medium of the present invention is a recording medium carrying a program for causing a computer to execute the function of the display control means of the display device of the present invention described above. The recording medium is used in cooperation with the computer.

  Further, one usage form of the program of the present invention may be an aspect in which the program is recorded on a computer-readable recording medium and operates in cooperation with the computer.

  The recording medium includes a ROM and the like, and the transmission medium includes a transmission medium such as the Internet, light, radio waves, sound waves, and the like.

  The computer of the present invention described above is not limited to pure hardware such as a CPU, and may include firmware, an OS, and peripheral devices.

  As described above, the configuration of the present invention may be realized by software or hardware.

  The display device according to the present invention is useful as an electronic paper, an electronic book, and a portable information terminal, and is particularly suitable for an application that enables reference while maintaining a display state even when the power is turned off.

The figure which shows the usage type of the display system in Embodiment 1 of this invention. Schematic which shows the external appearance of the display apparatus 2 of Embodiment 1 of this invention. Block diagram of transmitting apparatus 10 according to Embodiment 1 of the present invention The block diagram of the server apparatus 3 of Embodiment 1 of this invention. The block diagram of the display apparatus 2 of Embodiment 1 of this invention. The conceptual diagram which shows the cross section of an example of the display apparatus 2 which can be referred from the front and back both surfaces of Embodiment 1 of this invention Cross-sectional view of the main structure of a conceptual part of a display device using a conventional electrophoresis system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reference person 2 Display apparatus 3 Server apparatus 4a 1st antenna 4b 2nd antenna 5a 1st display control means 5b 2nd display control means 6a 1st display means 6b 2nd display means 7 Control means 10 Transmission apparatus

Claims (9)

Two displays on both sides,
A recognition means for recognizing the side facing the referrer side,
A display device comprising: a display control unit configured to update a display content of a display unit on a side not facing the viewer side of the two display units when updating the display content on the display unit.   The recognizing means has antennas arranged on both sides at least one by one, and compares the reception intensity received by each antenna of electromagnetic waves transmitted from a transmitter attached to the upper body of a reference person. The display device according to claim 1, wherein a surface on which a low-strength antenna is disposed is recognized as a surface on the side not facing the reference side. The transmitting device transmits unique ID data,
Furthermore, an ID detection means for detecting ID data from the electromagnetic wave received by the antenna is provided,
The display device according to claim 2, wherein the display control unit updates the display content of the display unit only when the ID data detected by the ID detection unit is a predetermined value. A transmitting device that can be worn by a reference and transmits unique first ID data by a wireless transmission method;
A server device that transmits unique second ID data by a wireless transmission method, and selects display data as necessary and transmits the wireless data by a wireless transmission method;
A display that displays the display data only when the first ID data, the second ID data, and the display data are received and the first ID data and the second ID data have predetermined values. And a display system. The display device
At least two independent display parts on both sides,
At least two independent antennas for receiving electromagnetic waves transmitted from the transmission device;
Recognizing means for comparing the reception intensity of the electromagnetic wave received by each of the antennas and recognizing the surface on which the antenna with low reception intensity is arranged as the surface not facing the reference side,
5. The display control unit according to claim 4, further comprising: a display control unit configured to update a display content of a display portion of the two display portions that is not suitable for a reference side when updating the display content on the display portion. Display system. Recognizing the side of the two sides facing the referrer side,
The display method of a display apparatus provided with the step which updates the display content of the display part arrange | positioned at the surface which is not suitable for the said reference side among the two display parts arrange | positioned at each of the said both surfaces.   The electronic book provided with the display apparatus in any one of Claims 1 thru | or 3 which has a display part using an electrophoresis system.   The program for functioning a computer as the said display control means of the display apparatus in any one of Claims 1 thru | or 3.   A recording medium carrying the program according to claim 8 and usable by a computer.

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