JP2009069355A - Electronics - Google Patents

Abstract

【Task】
It is possible to select the presence / absence of display, the display contents, and the display direction of the nonvolatile display device after the power is turned off.
[Solution]
The user uses the user input means (8) to set whether the display of the nonvolatile display device (7) is left or erased after the power is turned off. The system control device (6) stores the setting information in the memory (10). When there is a power-off operation, the system control device (6) reads the setting information from the memory (10) and controls the display of the nonvolatile display device (7). When erasing the display, the system control device (6) changes the display of the nonvolatile display device (7) to a black screen, a white screen, or an appropriate pattern screen.
[Selection] Figure 1

Description

  The present invention relates to an electronic apparatus having a non-volatile display device such as electronic paper that retains display contents even when the power is turned off.

  2. Description of the Related Art Conventionally, liquid crystal displays have been widely used as display devices for electronic devices such as portable information terminals such as mobile phones and camcorders. However, the liquid crystal display needs to continue to supply power in order to maintain the display content. In addition, since the liquid crystal display is not a self-luminous device, it requires a light source such as a backlight and consumes a lot of power.

  In recent years, attention has been focused on non-volatile display devices that retain display contents even when the power is turned off as a display device that replaces a liquid crystal display. A representative example of the nonvolatile display device is so-called electronic paper, and various methods have been studied and proposed.

  FIG. 8 shows the configuration of an electrophoretic electronic paper. The electrophoretic electronic paper has a configuration in which a colored liquid 82 such as blue and white fine particles 83 are placed in a transparent microcapsule 81. By applying a voltage, white fine particles are electrophoresed to display white or blue or the like.

  Specifically, microcapsules 81 using titanium oxide as white particles are coated on a film with an ITO electrode using a silicon resin as a binder. When a negative charge pattern is given to the surface by the ion flow method, the white particles move to the lower part of the microcapsule and the surface becomes blue display. Conversely, when a positive charge is applied, the white particles move to the top of the microcapsule and the surface becomes white. The color liquid can be displayed by configuring the colored liquid 82 with blue, red, green, and black and configuring one pixel with blue, red, green, and black capsules.

  FIG. 9 shows a configuration of a twisting ball type electronic paper. In this electronic paper, the display of white and black is selected by controlling the direction of the spherical fine particles 90 painted in white and black for each hemisphere by an electric field. If a negative charge pattern is applied to the surface of the sheet surface where the white side 91 of the particle surface is negative and the black side 92 is positive, the particles rotate and the black hemisphere faces upward, resulting in black display. Conversely, when a positive charge is applied to the surface of the sheet, the white hemisphere faces upward, resulting in white display. By preparing blue, red, green and black balls, color display becomes possible.

  FIG. 10 shows a configuration of electronic paper of a system that changes the absorption of a dye by applying a voltage to a guest-host type liquid crystal. When a mixture of the liquid crystal 101, the dichroic dye 102 and the resin is applied to the ITO transparent electrode and an image is written by ion flow recording, the dye is oriented and white recording is performed. When heated at 60 ° C. or higher, the original gray color is restored and the image can be erased. First, the white state can be obtained by corona charging, and an image can be formed by thermal writing with a thermal head. In this case, color display is possible by using blue, red, green and black dyes instead of the two-color dyes.

  There is also electronic paper that uses a cholesteric liquid crystal and an organic photoreceptor composite film. This controls the display / non-display by utilizing the specific property of the cholesteric liquid crystal with respect to the applied electric field. That is, the cholesteric liquid crystal is planarly aligned in the absence of an electric field, and selectively reflects color light according to the spiral pitch of the liquid crystal. In a weak electric field, it becomes a focal conic formulation and transmits light and maintains its state. When a stronger electric field is applied, the planar alignment is restored. For writing to the medium, an organic photoconductive film is stacked and the partial pressure to the liquid crystal layer is controlled. Even in this device, color display is possible by overlaying RGB layers.

  In addition, electronic paper as shown in FIG. 11 has also been proposed. The color toner 112 and the white particles 111 are sandwiched between two glass plates provided with the ITO electrode 110, and information is displayed by applying a voltage.

  These electronic papers have a feature that even if the power is turned off, the state is maintained as it is by the force of static electricity. Therefore, the electronic paper can continue to display information indefinitely without power.

When a non-volatile display device typified by electronic paper is used in the digital camera, information such as the remaining battery level and the number of shootable images can be displayed on the display screen of the electronic paper even after the power is turned off.
JP 2003-209718 A

  When the nonvolatile display device is used as a display device for an electronic device such as a portable information terminal such as a mobile phone or a camcorder, the following inconvenience occurs. The display content includes secret data and information that is not desired to be known by others. Such information that is not desired to be displayed varies depending on the user, and the user needs to be able to select the content to be displayed on the non-volatile display device.

  Some recent portable electronic devices automatically change the display direction of the display device depending on how the electronic device is held. For example, even in a video camera, the display direction of an image differs between when the screen of the liquid crystal display is oriented in the back direction and when it is oriented in the front direction. Some mobile phones detect whether they are held vertically or horizontally and automatically change the image display direction. When a non-volatile display device is used for such a display device, the display direction of the non-volatile display device may become inappropriate as the display direction when the power is turned off.

  An object of this invention is to show the electronic device which eliminates such an inconvenience.

  An electronic apparatus according to the present invention is an electronic apparatus having a non-volatile display device, the setting means for setting whether to leave or erase the display of the non-volatile display device after power-off, and the setting according to the power-off operation Control means for controlling display of the nonvolatile display device in accordance with information set by the means.

  An electronic device according to the present invention is connected to a main body so as to be rotatable and reversible, and displays a information in a display direction in accordance with the rotation and reversal positions of the nonvolatile display device after power-off. Setting means for setting whether to leave or erase the display and setting the display direction; and control means for controlling the display of the nonvolatile display device and the display direction according to the information set by the setting means according to the power-off operation It is characterized by comprising.

  An electronic device according to the present invention is connected to a main body so as to be rotatable and reversible, and displays a information in a display direction in accordance with the rotation and reversal positions of the nonvolatile display device after power-off. Setting means for setting the display contents and the display direction when leaving the display or deleting the display, and the power-off operation according to the information set by the setting means, and the display and display of the nonvolatile display device And a control means for controlling the display direction.

  According to the present invention, it can be set in advance whether the display of the nonvolatile display device is left or erased after the power is turned off, and unnecessary information leakage can be prevented. In addition, by setting the display direction of the nonvolatile display device after the power is turned off in advance, the display contents can be easily seen regardless of the display direction when the power is turned off, and the operability is improved.

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

  FIG. 1 shows a schematic block diagram of a video camera which is an embodiment of an electronic apparatus according to the present invention, and FIG. 2 shows an external perspective view of the embodiment. This embodiment is a video camera using a DVD-R as a recording medium.

  The video / audio input means 1 includes a photographic lens, an image sensor, and a microphone, and outputs an image signal of a subject and surrounding audio signals. The video / audio processing device 2 processes the video / audio signal from the video / audio input means 1 for recording and display, and supplies it to the recording / reproducing drive 3 and the system control device 6. The recording / reproducing drive 3 records the video / audio signal processed for recording from the video / audio processing device 2 on the recording medium 4. The system control device 6 supplies the video signal from the video / audio processing device 2 to the nonvolatile display device 7 and / or the display device 9 to display the recorded video. The nonvolatile display device 7 and / or the display device 9 are used as a finder.

  The non-volatile display device 7 includes electronic paper that can display both moving image still images and a driver IC that drives the electronic paper. As shown in FIG. 2, the non-volatile display device 7 is connected to the main body via a biaxial hinge mechanism so as to be rotatable and reversible, and rotates from the side surface of the main body so as to direct the display screen in the rear direction. Can do. The non-volatile display device 7 can also direct the display screen in the front direction of the camera. The display device 9 is an electronic viewfinder that includes a liquid crystal panel, a driver IC that drives the liquid crystal panel, and a backlight light source.

  The recording / reproducing drive 3 also reproduces the designated video / audio signal from the recording medium 4 and supplies it to the video / audio processing device 2. The video / audio processing device 2 processes the video / audio signal reproduced by the recording / reproducing drive 3 for display and supplies it to the system control device 6. The system control device 6 supplies the playback video signal from the video / audio processing device 2 to the nonvolatile display device 7 and / or the display device 9 to display the playback video. The non-volatile display device 7 and / or the display device 9 is used as a monitor for a reproduced video.

  The recording medium 4 is composed of, for example, a DVD-R. The recording / reproducing drive 3 has a function of finalizing the recording medium 4. The recording / reproducing drive 3 includes a disk attaching / detaching mechanism, and the recording medium 4 can be exchanged.

  The user can instruct various operations to the system control device 6 by the user input means 8. The user input means 8 includes a power switch for turning on / off the power, a mode switch for switching between a reproduction mode and a recording mode, a button for operating start and end of recording or reproduction, and the like. When the user turns on the power switch, the video camera of the present embodiment enters an operating state. When the video camera operates, the battery 5 supplies necessary power to each unit.

  The nonvolatile display device 7 can display a moving image and a still image. The system control device 6 stores setting values for use (for example, information displayed on the non-volatile display device 7 or information not displayed) in the memory 10.

  The basic operation of this embodiment will be described. At the time of shooting, the video / audio input means 1 outputs the video signal and audio signal of the subject and surroundings to the video / audio processing device 2. The video / audio processing device 2 processes the video signal and the audio signal from the video / audio input means 1 for recording and supplies them to the recording / reproducing drive 3. The processing content of the video / audio processing device 2 includes compression processing of the video / audio signal. The recording / reproducing drive 3 records the video / audio signal from the video / audio processing device 2, more specifically, the compressed video / audio data on the recording medium 4.

  The video / audio processing device 2 also processes the video signal from the video / audio input means 1 for display and supplies it to the system control device 6. The system control device 6 supplies the video signal from the video / audio processing device 2 to the nonvolatile display device 7 and / or the display device 9. That is, the nonvolatile display device 7 and / or the display device 9 are used as a finder. Whether to use both the non-volatile display device 7 and the display device 9 or one of them can be designated by the user in advance using the user input means 8.

  At the time of reproduction, the recording / reproducing drive 3 reproduces the designated audio / video information from the recording medium 4 and supplies it to the audio / video processing apparatus 2. The video / audio processing device 2 decompresses the compressed video / audio data from the recording / reproducing drive 3 to reproduce the video signal, and supplies the reproduced video signal to the system control device 6. The system control device 6 supplies the reproduced video signal from the video / audio processing device 2 to the nonvolatile display device 7 and / or the display device 9. That is, the non-volatile display device 7 and / or the display device 9 are used as a reproduced video monitor. Whether to use both the non-volatile display device 7 and the display device 9 or one of them can be designated by the user in advance using the user input means 8. When the display device 9 includes a speaker, reproduced sound can also be output from the speaker.

  Next, a change in the display direction with respect to the arrangement of the nonvolatile display device 7 at the time of photographing will be described. FIG. 3 shows an external view (a) during normal photographing with the display screen of the nonvolatile display device 7 facing in the back direction and a display screen example (b) of the nonvolatile display device 7. The photographer takes a picture while looking at the screen of the nonvolatile display device 7. Since this photographing mode is the most common, the display direction of the nonvolatile display device 7 at this time is the normal direction. In FIG. 3, in order to make the display direction of the nonvolatile display device 7 easy to understand, a black circle is added below the nonvolatile display device 7.

  FIG. 4 shows an external view (a) during face-to-face photography and a display screen example (b) of the nonvolatile display device 7. This is a photographing mode used when the photographer photographs himself, and the display screen of the nonvolatile display device 7 is directed to the front. Since the nonvolatile display device 7 is turned upside down, the image is displayed upside down.

FIG. 5 shows an external view (a) in an inverted storage state in which the display screen of the nonvolatile display device 7 faces outward and is closely stored in the main body, and a display screen example (b) of the nonvolatile display device 7. Show. This is exclusively used when viewing the playback video. At this time, the display direction of the nonvolatile display device 7 is reversed vertically and horizontally with respect to the normal direction.
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  FIG. 6 shows an external view in a normal storage state in which the display screen of the nonvolatile display device 7 is closely stored in the main body with the display screen facing the main body side (inside). In this state, the power source of the nonvolatile display device 7 is turned off, and the display device 9 is in a state where power is supplied. In this specification, the state in which the power source of the nonvolatile display device 7 is off and the power source of the display device 9 is on is referred to as a CVF mode, and the state in which the power source of the nonvolatile display device 7 is off is referred to as a panel mode.

  Thus, the non-volatile display device 7 displays information in the display direction according to the rotation and inversion positions with respect to the main body.

  FIG. 7 shows a control flowchart of characteristic operations of this embodiment. First, the user sets the usage and display form of the nonvolatile display device 7 according to the display menu (S1). Specifically, it is set whether to leave or erase the display on the nonvolatile display device 7 after the main body is turned off. The display contents when the display is left are, by default, the battery remaining amount, the remaining amount of media, the last recorded video, and the last recorded date and time. In these and other information, which information is displayed is set. In addition, the display direction is selected from “normal”, “upside down”, and “upside down, left and right upside down”. The user may determine the display direction in consideration of the storage state of the nonvolatile display device 7 after the power is turned off. For example, when the non-volatile display device 7 is inverted and stored after the power is turned off, “vertical up / down / left / right inversion” is selected. When the non-volatile display device 7 is normally stored after the power is turned off and it is desired to check the display, “normal” is selected when the display screen is turned to the back. The system control device 6 stores the set or selected content in the memory 10.

  After appropriate use, assume that the user performs a power-off operation to turn off the main body by the power switch of the user input means 8 (S2). The system control device 6 confirms the display setting of the nonvolatile display device 7 stored in the memory 10 (S3). When the display is set to be erased (S3), the system control device 6 updates the entire screen of the nonvolatile display device 7 with a non-display screen, for example, a black screen, a white screen, or an appropriate background screen. (S4), the power of the main body is actually turned off (S10).

  When setting is made to leave the display of the nonvolatile display device 7 (S3), it is checked whether the operation mode is the CVT mode or the panel mode (S5). In the case of the CVT mode (S5), the nonvolatile display device 7 is turned on (S6). In the panel mode, since the display of the nonvolatile display device 7 has already been turned on, the process of step S6 is unnecessary.

  After step S5 or S6, the display direction (set display direction) set in the memory 10 is compared with the current display direction (S7). If they do not match (S7), the display direction of the non-volatile display device 7 is changed to the set display direction, and the display content (setting display content) set in the memory 10 is displayed (S8). If they match (S7), the setting display content is displayed on the nonvolatile display device 7 (S9). After steps S8 and S9, the main body is turned off.

  According to the present embodiment, it is possible to select whether the display of the nonvolatile display device 7 is left or erased after the main body power is turned off. Even when the display is left, the display contents can be set in advance and the display direction can be set. This makes it possible to display desired information in a power-off state while preventing information leakage.

It is a schematic block diagram of one Example of this invention. It is an external appearance perspective view of a present Example. It is the external view (a) at the time of normal imaging | photography, and the example of a display screen (b) of the non-volatile display apparatus 7. FIG. It is the external view (a) at the time of facing imaging | photography, and the display screen example (b) of the non-volatile display apparatus 7. FIG. They are the external view (a) in the reverse storage state of the non-volatile display device 7, and the example of a display screen (b) of the non-volatile display device 7. It is an external view in the normal accommodation state of the non-volatile display apparatus 7. FIG. It is a control flowchart of the characteristic operation | movement of a present Example. It is a block diagram of an electrophoretic electronic paper. It is a block diagram of a twisting ball type electronic paper. It is a block diagram of the electronic paper of a liquid crystal / 2 color dye mixing system. FIG. 3 is a configuration diagram of a toner display type electronic paper.

Explanation of symbols

1: Video / audio input means 2: Video / audio processing device 3: Recording / reproduction drive device 4: Recording medium 5: Battery 6: System control device 7: Non-volatile display device 8: User input means 9: Display device 10: Memory

Claims (5)

An electronic device having a nonvolatile display device,
Setting means for setting whether to leave or erase the display of the nonvolatile display device after power off;
An electronic apparatus comprising: control means for controlling display of the nonvolatile display device in accordance with information set by the setting means in accordance with a power-off operation.   The electronic device according to claim 1, wherein the control unit turns off the power of the electronic device after controlling the display of the nonvolatile display device. A non-volatile display device connected to the main body so as to be rotatable and reversible, and displaying information in a display direction according to the rotation and reversal positions;
Setting means for setting the display direction to leave or erase the display of the nonvolatile display device after power off;
An electronic apparatus comprising: control means for controlling display and display direction of the nonvolatile display device according to information set by the setting means in accordance with a power-off operation. A non-volatile display device connected to the main body so as to be rotatable and reversible, and displaying information in a display direction according to the rotation and reversal positions;
Whether to leave or erase the display of the non-volatile display device after the power is turned off, and setting means for setting the display content and display direction when leaving the display; and
An electronic apparatus comprising: control means for controlling display and display direction of the nonvolatile display device according to information set by the setting means in accordance with a power-off operation.   The control means changes the display direction of the non-volatile display device to the set display direction when the display direction of the non-volatile display device during the power-off operation does not match the set display direction. The electronic device according to claim 3 or 4.

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