JP2006227409A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain display forms appropriate for the case an observer operates a display device while viewing display contents and a case the observer places the display device and observes the display contents, respectively. <P>SOLUTION: The image display device automatically switches the display mode to a book mode when it is regarded to be in a standby state or in an operation state by the decision based on the detection signal from an acceleration sensor 19 and automatically switches the mode to a frame mode 1 when it is regarded to be in a placed state. In the book mode, a reproduced image is displayed on a liquid crystal display element 20 as a vertically long screen and Exif information incidental to the image data is displayed in a margin region 21. In the frame mode 1, the display of the Exif information is omitted and the reproduced image is highlighted on a large scale at a full size as large as the screen of the liquid crystal display element 20 as a horizontally long screen. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device used both in a hand-held state and a placement state.

  A display mode in a hand-holdable electronic device in which a display unit provided with a display member such as a liquid crystal panel and an operation unit provided with an operation member such as an operation key are foldable via a hinge. There is known a technique for automatically changing the display mode without performing an operation for switching (see Patent Document 1). Patent Document 1 discloses a technique for changing the display size of image data in accordance with the distance between an observer's face and a display unit.

JP-A-10-260666

  In the method of switching the display mode according to the distance between the display unit and the observer, when the distance between the face of the observer and the display unit of the electronic device is the same, the electronic device is manually operated from the observer It cannot be distinguished from the state where the electronic device is placed on a table or the like, and cannot be displayed in a mode suitable for each state.

The display device according to the present invention determines a display monitor for displaying an image, display control means for displaying a reproduced image based on image data on the display monitor, and whether or not the housing of the display device is in a mounted state. And a display mode instructing unit for instructing the display control unit to change the display mode in displaying the reproduced image according to the result.
The display device according to claim 1 further includes a hinge member that rotatably supports a display portion on which a display monitor is disposed and a base portion that is in contact with the placement surface in the placement state, and rotation of the hinge member. And an angle detection unit that detects a relative angle between the changing display unit and the operation unit. In this case, the display mode instruction unit determines the mounting state based on the detection signal output from the angle detection unit. You can also
The display device according to claim 1 may further include a swing detection unit that detects the swing of the display device. In this case, the display mode instruction unit is based on a detection signal output from the swing detection unit. It is also possible to determine the mounting state.
The display mode instruction means of the display device, when determining the mounting state, (1) increase the display brightness, and (2) display the reproduced image flashy compared to the case of negative determination of the mounting state. Change the tone characteristics setting value, (3) Change the saturation characteristics setting value so that the playback image is displayed vividly, (4) Strengthen the contour enhancement characteristics of the playback image, (5) Playback image Instructing the display control means to display at least one of increasing the display size to the display control means and displaying the information accompanying the image data together with the reproduced image when the placement state is negatively determined. You can also.
The display device according to claim 4 may further include a distance measuring unit. In this case, the display mode instruction unit corresponds to the distance information between the viewer and the observer calculated by the distance measuring unit. (1) Change the setting value of the gradation characteristic so that the reproduced image is displayed more gorgeously, (2) Change the setting value of the saturation characteristic so that the reproduced image is displayed more vividly, ( 3) It is also possible to instruct the display control means to at least one of further enhancing the contour enhancement characteristics of the reproduced image.
The distance measuring unit of the display device according to claim 5 includes an imaging unit, and the display mode instruction unit changes the color temperature adjustment value according to color temperature information calculated using an imaging signal from the imaging unit. It is also possible to instruct the display control means.

  In the display device according to the present invention, the display mode of the reproduced image is changed according to the determination result as to whether or not the display device is placed. For example, when the observer operates the display device while viewing the display content, It is possible to display in an appropriate manner for each case where the device is placed and the display content is observed.

The best mode for carrying out the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a three-view diagram illustrating an image display device according to a first embodiment of the present invention. 1, in the image display apparatus, a display unit 11 having a liquid crystal display element 20 and an operation unit (base unit) 12 having an operation key 15 and a stylus input member 16 are integrated by a hinge 13. The hinge 13 is configured to be rotatable about a rotation axis O as a central axis, and supports a relative angle between the display unit 11 and the operation unit 12 at an arbitrary angle. As for the weight of the operation part (base part) 12, it is desirable to be comprised so that the weight of the display part 11 may be heavier.

A usage pattern of the image display device will be described.
(Book mode)
The image display apparatus in FIG. 1 exemplifies usage in the book mode. The image display apparatus in the book mode includes, for example, a surface on the liquid crystal display element 20 side (hereinafter referred to as a display surface) 11a of the display unit 11 and a surface on the operation key 15 or stylus input member 16 side (hereinafter referred to as an operation surface) of the operation unit 12. The hinge 13 is held by the user in a state where the hinge 13 is opened about 180 degrees from the folded state (with an opening / closing angle of 0) so that 12a faces the direction of the user (particularly the eyes).

  The user presses the operation key 15 while viewing the image displayed on the liquid crystal display element 20 of the display unit 11 and information related to the image, or writes and inputs to the stylus input member 16 using the stylus pen 17. To do. An image to be displayed on the liquid crystal display element 20 is instructed to the image display device by an operation signal from the operation key 15 or the stylus input member 16.

  In the book mode, the liquid crystal display element 20 is observed as a vertically long screen. The image display device reproduces and displays a normal horizontally long image on the liquid crystal display element 20 as a vertically long screen. In this case, the long side (horizontal direction) of the reproduction display image is displayed in correspondence with the short side of the liquid crystal display element 20, and the margin region (reference numeral 21 in FIG. 1) in the short side direction (vertical direction) of the reproduction display image is displayed. The information added to the reproduced image data (Exif information) is displayed in text. In the example of FIG. 1, the image data file name “DSCNxxx1.JPG”, the shooting date “2004/8/5”, the shooting time “10:45”, the shutter speed as the shooting condition, and the aperture value “1 /” are used as Exif information. "250 F2.8" is displayed in the lower area 21 of the reproduced image. Items to be displayed as Exif information can be appropriately changed by an operation from the operation key 15.

  The information “2004 Europe Travel” written and input from the stylus input member 16 by the stylus pen 17 is configured to be recordable in the image data file together with the Exif information. Therefore, the write input information additionally recorded in the image data file can be automatically displayed in the area 21 together with other Exif information at the next reproduction display.

(Frame mode 1)
FIG. 2 is a diagram illustrating a usage pattern in the frame mode 1 of the image display apparatus. The hinge 13 is opened about 290 degrees from the folded state, and is placed on a flat surface such as a desk with the operation surface 12a of the operation unit 12 facing downward. The included angle between the display unit 11 and the operation unit 12 is about 70 degrees. The user views an image displayed on the liquid crystal display element 20 of the display unit 11.

  The images displayed on the liquid crystal display element 20 are, for example, reproduced images based on image data corresponding to a plurality of image files stored in a memory card 18 (FIG. 4) to be described later, which are sequentially displayed as a slide show. is there. Further, instead of sequentially displaying a plurality of reproduced images as a slide show, a predetermined image stored in the memory card 18 (for example, an image designated in advance by an operation signal from the operation key 15) is reproduced and displayed. May be.

  The image display device reproduces and displays a normal horizontally long image on the liquid crystal display element 20 as a horizontally long screen. In this case, the long side (horizontal direction) of the reproduced display image is displayed in correspondence with the long side of the liquid crystal display element 20. The text display of the Exif information is omitted, and the display size of the playback display image is made larger than the display size of the playback display image displayed on the liquid crystal display element 20 in the book mode.

(Frame mode 2)
FIG. 3 is a diagram illustrating a usage pattern in the frame mode 2 (photo frame) of the image display apparatus. The hinge 13 is opened about 80 degrees from the folded state, and is placed on a flat surface such as a desk with the back surface 12b of the operation unit 12 facing down. The included angle between the display unit 11 and the operation unit 12 is about 80 degrees. A detachable transparent cover 22 is provided on the back surface 11 b of the display unit 11, and a photographic print 23 is held between the display unit 11 and the transparent cover 22. The user appreciates the photographic print held. The sandwiched photographic print can be viewed even in a folded state with an opening / closing angle of 0 °, and also has a function as a decorative part of the appearance.

  FIG. 4 is a block diagram illustrating the configuration of the image display apparatus. In FIG. 4, the display unit 11 includes a liquid crystal display element 20, a liquid crystal driving circuit 20c, a backlight 20a, and a backlight driving circuit 20b. The liquid crystal drive circuit 20c generates a liquid crystal panel drive signal according to display data output from the control circuit 31 described later, and drives the liquid crystal display element 20 with the generated drive signal. Specifically, a voltage corresponding to display data is applied to a liquid crystal layer (not shown) of the liquid crystal display element 20 for each pixel. In the liquid crystal layer to which a voltage is applied, the arrangement of liquid crystal molecules changes, and the light transmittance of the liquid crystal layer changes.

  The backlight drive circuit 20b turns on the backlight 20a with the instructed luminance in accordance with the lighting instruction output from the control circuit 31. The lit backlight 20a illuminates the liquid crystal display element 20. Illumination light from the backlight 20a is modulated by being transmitted through the liquid crystal layer of the liquid crystal display element 20, whereby a reproduced image based on display data is displayed.

  The operation unit 12 side includes a control circuit 31, an acceleration sensor 19, a stylus input member 16, an operation key 15, a power source 14 having a battery 14a, and a camera 25, and is configured to be detachable. A card 18 is installed. The control circuit 31 transmits a control signal to each part of the image display device by performing a predetermined calculation using a signal input from each part of the image display device based on the control program, thereby The operation and the image display operation are controlled respectively. The control program is stored in a nonvolatile memory (not shown) in the control circuit 31.

  The clock circuit 31a is built in the control circuit 31, and generates time information by dividing a clock signal (not shown). The acceleration sensor 19 detects the swing of the image display device and outputs a detection signal to the control circuit 31. If there is a change in the detection signal, the control circuit 31 determines that it is in the swinging state, and if there is no change in the detection signal, determines that it is in the mounting state.

  The stylus input member 16 outputs an input signal corresponding to the input operation by the user to the control circuit 31. The operation key 15 outputs an operation signal corresponding to the operation by the user to the control circuit 31. The memory card 18 is constituted by a non-volatile memory such as a flash memory, and data can be written, stored, and read by commands from the control circuit 31. The power source 14 is configured by a DC / DC conversion circuit or the like, converts the voltage of the battery 14a into a DC voltage necessary for each part in the image display device, and supplies the converted voltage to each block.

  The camera 25 includes an image sensor and a photographing lens that forms a subject image on the image sensor. The camera 25 captures a subject image in accordance with a shooting instruction from the control circuit 31, performs predetermined signal processing on the image data, and sends the image data to the control circuit 31. As the image sensor, a CCD, a CMOS image sensor or the like is used. The camera 25 is configured to shoot a main subject facing the display surface 11a of the display unit 11 in the usage mode of the frame mode 1.

  The hinge 13 incorporates an open / close angle detection sensor 13a and a twist angle detection sensor 13b. The opening / closing angle detection sensor 13 a outputs a detection signal corresponding to the opening / closing angle of the hinge 13 rotated about the rotation axis O to the control circuit 31. The twist angle detection sensor 13b will be described later.

  In the above image display device, the control circuit 31 reads and reads the image data from the memory card 18 in order to display the reproduced image based on the image data recorded on the memory card 18 on the liquid crystal display element 20 of the display unit 11. Display data corresponding to the number of display pixels of the liquid crystal display element 20 is generated using the image data, the generated display data is sent to the liquid crystal drive circuit 20c, and a lighting instruction is sent to the backlight drive circuit 20b.

  The mode switching process performed by the control circuit 31 will be described with reference to the flowchart shown in FIG. The control circuit 31 repeats the process shown in FIG. 5 in a state where a power switch (not shown) of the image display device is turned on. The frame mode 2 is used in a state where a power switch (not shown) is turned off.

  In step S1 of FIG. 5, the control circuit 31 determines whether or not the detection signal from the acceleration sensor 19 continues to change for a predetermined time (for example, 5 minutes). If there is no change in the input signal, the control circuit 31 makes a positive determination in step S1 and proceeds to step S3. If the input signal has changed, the control circuit 31 makes a negative determination in step S1 and proceeds to step S2. When the process proceeds to step S2, the image display apparatus is regarded as being held by hand or being operated by the user. When the process proceeds to step S3, the image display apparatus is regarded as being placed.

In step S2, the control circuit 31 switches to the book mode and returns to step S1. In the switching process to the book mode, the contents of the following a1 to f1 are instructed to the liquid crystal drive circuit 20c and the backlight drive circuit 20b as display modes of the liquid crystal display element 20. Image processing necessary for changing the gradation characteristic, the saturation characteristic, and the edge enhancement characteristic is performed by the control circuit 31.
a1. A normal horizontally long image is reproduced and displayed on the liquid crystal display element 20 as a vertically long screen.
b1. Exif information added to the reproduction image data is displayed as text in a margin area 21 (FIG. 1) in the short side direction of the reproduction display image.
c1. Set the display brightness (brightness) to the standard setting.
d1. Set the gradation characteristics (including contrast and γ characteristics) to the standard setting values.
e1. Set the saturation characteristics to the standard settings.
f1. Set the edge enhancement characteristic to the standard setting value.

In step S3, the control circuit 31 switches to the frame mode 1 and proceeds to step S4. In the switching process to the frame mode 1, the following content is instructed to the liquid crystal drive circuit 20c and the backlight drive circuit 20b as the display mode of the liquid crystal display element 20.
a2. A normal horizontally long image is reproduced and displayed on the liquid crystal display element 20 as a horizontally long screen.
b2. Exif information display is omitted.
c2. Increase (brighter) the display brightness (brightness) above the standard setting.
d2. The setting value of the gradation characteristic is changed from the standard setting value so that the image is displayed flashy.
e2. The setting value of the saturation characteristic is changed from the standard setting value so that the image is displayed vividly.
f2. Make the edge enhancement characteristic stronger than the standard setting.

  In step S4, the control circuit 31 determines whether or not AF (autofocus) information obtained by the camera 25 corresponds to a distance farther than a predetermined distance. The control circuit 31 calculates a distance to the closest subject by performing a known AF calculation process (for example, hill-climbing AF) using the image data transmitted from the camera 25. That is, the camera 25 and the control circuit 31 function as distance measuring means (circuit). For example, when the distance corresponding to the information calculated by the distance measuring unit is longer than 1 m, an affirmative determination is made in step S4 and the process proceeds to step S5. If the calculated distance is 1 m or less, the control circuit 31 makes a negative determination in step S4 and returns to step S1. The distance measuring means may be a distance measuring means using the principle of triangulation, a distance measuring means using a laser, a sound wave, or the like, or a phase difference type distance measuring means.

In step S5, the control circuit 31 instructs the liquid crystal drive circuit 20c to further emphasize, and returns to step S1. If an instruction for further emphasis has already been given, the emphasis may be maintained and the process may return to step S1. In the further emphasis instruction, the following content is instructed to the liquid crystal driving circuit 20c as the display mode of the liquid crystal display element 20.
d3. The gradation characteristic is made more flashy than the set value in the normal frame mode 1.
e3. The saturation characteristic is made more vivid than the set value in the normal frame mode 1.
f3. The edge enhancement characteristic is made stronger than the set value in the normal frame mode 1.

According to the first embodiment described above, the following operational effects can be obtained.
(1) When it is determined that the image display device is in a hand-held state or being operated by determination based on the detection signal from the acceleration sensor 19, the mode is automatically switched to the book mode (step S2), and the image display device is in the placement state. If it is considered that the frame mode is switched to the frame mode 1 (step S3), the switching operation by the user can be made unnecessary.

(2) In the book mode, the reproduced image is displayed on the liquid crystal display element 20 as a vertically long screen, and the Exif information attached to the image data is displayed in the margin area 21. It is possible to easily check shooting conditions and add information to Exif information using the stylus input member 16.

(3) In the book mode, the display characteristics of the liquid crystal display element 20 are set to the contents c1 to f1, so that the reproduced image based on the image data stored in the memory card 18 is displayed as it is without changing the display characteristics. . As a result, the user can observe the fine gradation and resolution of the image data.

(4) In the frame mode 1, the display of Exif information accompanying the image data is omitted, and the reproduced image is displayed in a large and full size on the entire screen of the liquid crystal display element 20 as a horizontally long screen. The display image can be observed from a position distant from.

(5) In the frame mode 1, since the parameters for the image display of the liquid crystal display element 20 are changed and the display characteristics are set to the contents of c2 to f2 above, the reproduced image based on the image data stored in the memory card 18 is It is highlighted with different display characteristics. As a result, the user can view the reproduced image even from a remote position. The content to be emphasized may be at least one of the above c2 to f2.

(6) In frame mode 1, the distance to the closest subject is calculated, and when the calculated distance is longer than 1 m, the parameters for image display of the reproduced image are changed to further enhance the display characteristics. Therefore, the user can view the reproduced image even from a further distance. The content to be emphasized may be at least one of the above d3 to f3.

(Second embodiment)
In the second embodiment, the control circuit 31 performs switching to the book mode, the frame mode 1 and the frame mode 2 based on the detection signal from the opening / closing angle detection sensor 13c. In addition, description is abbreviate | omitted about the part which overlaps with 1st embodiment. The mode switching process performed by the control circuit 31 will be described with reference to the flowchart shown in FIG. The control circuit 31 repeats the process shown in FIG. 6 when the battery 14a is loaded in the image display device.

  In step S11 of FIG. 6, the control circuit 31 determines whether the opening / closing angle of the hinge 13 is within a range of 0 to 90 degrees. When the detection signal from the opening / closing angle detection sensor 13c corresponds to the opening / closing angle range of 0 to 90 degrees, the control circuit 31 makes an affirmative decision in step S11 and proceeds to step S14, where the detection signal from the opening / closing angle detection sensor 13c is received. If the opening / closing angle exceeds 90 degrees, a negative determination is made in step S11, and the process proceeds to step S12.

  In step S12, the control circuit 31 determines whether the opening / closing angle of the hinge 13 is within a range of 91 to 270 degrees. When the detection signal from the opening / closing angle detection sensor 13c corresponds to the opening / closing angle range of 91 to 270 degrees, the control circuit 31 makes an affirmative decision in step S12 and proceeds to step S15, where the detection signal from the opening / closing angle detection sensor 13c is received. If the opening / closing angle exceeds 270 degrees, a negative determination is made in step S12, and the process proceeds to step S13. The process proceeds to step S15 when the image display device is regarded as being held by hand or being operated by the user.

  In step S13, the control circuit 31 determines that the opening / closing angle of the hinge 13 is within a range of 271 to 360 degrees. The process proceeds to step S <b> 16 when the image display device regards it as a placement state.

  In step S14, the control circuit 31 switches to frame mode 2 (photo frame) and returns to step S11. In the switching process to the frame mode 2, the liquid crystal drive circuit 20c is instructed to turn off the display of the liquid crystal display element 20, the backlight drive circuit 20b is instructed to turn off the backlight 20a, and the camera 25 is instructed to stop photographing. The power supply 14 is instructed to turn off the power supply to each block in the display unit 11. If the frame mode 2 has already been switched, the frame mode 2 is maintained and the process returns to step S11.

  In step S15, the control circuit 31 switches to the book mode and returns to step S11. In the switching process to the book mode, the camera 25 is instructed to stop photographing, the power supply to the camera 25 is turned off, the power supply 14 is instructed to turn on the power supply to each block in the display unit 11 except the camera 25, As the display mode of the liquid crystal display element 20 as shown in FIG. 1, the contents of the above a1 to f1 are instructed to the liquid crystal drive circuit 20c and the backlight drive circuit 20b. Image processing necessary for changing the gradation characteristic, the saturation characteristic, and the edge enhancement characteristic is performed by the control circuit 31. If the book mode has already been switched, the book mode is maintained and the process returns to step S11.

  In step S16, the control circuit 31 switches to the frame mode 1 and proceeds to step S17. In the switching process to the frame mode 1, the power source 14 is instructed to turn on the power supply to each block in the display unit 11, the imaging start to the camera 25 is instructed, and the liquid crystal display element 20 as shown in FIG. As the display mode, the contents a-2 to f2 are instructed to the liquid crystal drive circuit 20c and the backlight drive circuit 20b. If the frame mode 1 has already been switched, the frame mode 1 is maintained and the process proceeds to step S17.

  Since step S17 is the same as the process by step S4, description is abbreviate | omitted. Since step S18 is the same as the process in step S5, the description thereof is omitted.

According to the second embodiment described above, the following operational effects can be obtained.
(1) When it is determined that the image display device is in a hand-held state or in operation by determination based on the detection signal from the open / close angle detection sensor 13c, the mode is automatically switched to the book mode (step S15), and the image display device is mounted. If the image display device is regarded as being in the photo frame state, the frame mode is automatically switched to frame mode 2 (step S14). Since it did in this way, the switching operation by a user can be made unnecessary.

(2) In the book mode, as in the first embodiment, it is easy to check the shooting date, shooting conditions, etc. and add information to the Exif information. Further, it is possible to observe the fine gradation and resolution of the image data.

(3) In the frame mode 1, as in the first embodiment, the display image can be viewed even from a position away from the image display device.

(4) In the frame mode 2, the liquid crystal display is turned off, the backlight 20a is turned off, the photographing of the camera 25 is stopped, and the power supplied to each block in the display unit 11 is turned off, so that power consumption is reduced. Can do.

  The hinge 13 may be configured as a free angle hinge that can also rotate around an axis R (FIG. 2) orthogonal to the rotation axis O. In this case, the torsion angle detection sensor 13 b outputs a detection signal corresponding to the magnitude of the rotation angle of the display unit 11 that rotates about the rotation axis R to the control circuit 31. The control circuit 31 switches from the frame mode 1 to the frame mode 2 when the display unit 11 is rotated from the state of FIG. 2 (frame mode 1) and the rotation angle becomes approximately 180 degrees (for example, 150 degrees to 210 degrees). Switch.

  On the contrary, the control circuit 31 starts from the frame mode 2 to the frame when the display unit 11 is rotated from the state of FIG. 3 (frame mode 2) and the rotation angle is approximately 180 degrees (for example, 150 degrees to 210 degrees). Switch to mode 1. With such a configuration, the operation key 15 and the stylus input member 16 can be placed without contacting the placement surface. When there is no stylus input member 16, the operation key 15 may be provided on the side surface of the display unit 11, for example. That is, the base portion 12 does not necessarily include an operation member, and may have a support function for supporting the display portion 11 in the mounting state in the frame mode 1 and the frame mode 2.

  The above-described configuration c2 in which the display brightness (brightness) is increased from the standard setting value in the frame mode 1 may be performed according to the remaining amount of the battery 14a. When the remaining amount of the battery 14a decreases, the power consumed by the backlight 20a can be suppressed by not increasing the display brightness.

  Regarding the display characteristics of the liquid crystal display element 20, the white balance adjustment value may be changed in the frame mode 1. In this case, the control circuit 31 determines whether or not the color temperature information obtained from the image data transmitted from the camera 25 is higher than a predetermined color temperature. For example, when the color temperature is equal to or lower than a predetermined color temperature (the red ratio of the indoor illumination light on which the image display device is mounted is higher than the predetermined ratio), the white balance adjustment value is set so that the red display luminance is suppressed compared to the blue and green display luminances. Change (Color temperature adjustment value). When the color temperature is higher than the predetermined color temperature, the white balance adjustment value is set as a standard setting value. Thereby, it is possible to view the reproduced image while suppressing the influence of the color temperature of the illumination light of the room in which the image display device is placed.

  In the above description, a transmissive liquid crystal panel is exemplified as the liquid crystal display element, but a reflective liquid crystal or a semi-transmissive liquid crystal may be used instead of the transmissive liquid crystal panel. Moreover, it can also comprise using other types of display devices, such as an organic EL element.

  In the first embodiment and the second embodiment, the example in which the acceleration sensor 19 and the opening / closing angle detection sensor 13a are used to determine whether or not the placement state is set has been described. Absent. For example, in the process of transition from step S12 to step S15, the determination in step S1 is performed. If the determination is affirmative, the process proceeds to step S16, and if the determination is negative, the process proceeds to step S15. Further, in the transition process from step S13 to step S16, the determination in step S1 is performed. If the determination is affirmative, the process proceeds to step S16, and if the determination is negative, the process proceeds to step S15. With such a configuration, it is possible to further improve the accuracy of determination of the mounting state. Alternatively, a predetermined period after the input operation by the operation key 15 or the stylus input member 16 is performed may be regarded as being held by hand or being operated by the user.

  The correspondence between each component in the claims and each component in the best mode for carrying out the invention will be described. The display monitor includes, for example, a liquid crystal display element 20 and a backlight 20a. The display control means includes, for example, a liquid crystal drive circuit 20c, a backlight drive circuit 20b, and a control circuit 31. The display mode instruction means is constituted by the control circuit 31, for example. The angle detection means is constituted by, for example, an open / close angle detection sensor 13a (twist angle detection sensor 13b). The swing detection means is constituted by an acceleration sensor 19, for example. The distance measuring means and the imaging means are constituted by a camera 25, for example. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all. In addition, the display mode in the claims does not include a state in which power is not supplied to the display monitor and a non-display state in which information meaningful to the observer is not displayed.

It is a three-view figure explaining the image display apparatus by 1st embodiment of this invention. It is a figure which illustrates the usage type in the frame mode 1 of an image display apparatus. It is a figure which illustrates the usage type in the frame mode 2 of an image display apparatus. It is a block diagram explaining the structure of an image display apparatus. It is a flowchart explaining a mode switching process. It is a flowchart explaining the mode switching process by 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Display part 11a ... Display surface 11b ... Back surface 12 ... Operation part (base part)
12a ... Operation surface 12b ... Back surface 13 ... Hinge 13a ... Opening / closing angle detection sensor 13b ... Twist angle detection sensor 14 ... Power source 14a ... Battery 15 ... Operation key 16 ... Stylus input member 18 ... Memory card 19 ... Acceleration sensor 20 ... Liquid crystal display element 20a ... Backlight 20b ... Backlight drive circuit 20c ... Liquid crystal drive circuit 21 ... Margin area 25 ... Camera 31 ... Control circuits O, R ... Rotating shaft

Claims (6)

A display monitor for displaying images;
Display control means for displaying a reproduced image based on image data on the display monitor;
A display mode instruction unit that determines whether or not the housing of the display device is in a mounted state and that instructs the display control unit to change a display mode when displaying the reproduced image according to the determination result. A display device comprising: The display device according to claim 1,
A hinge member that rotatably supports a display portion on which the display monitor is disposed and a base portion that contacts the placement surface in the placement state;
An angle detection means for detecting a relative angle between the display unit and the operation unit that is changed by the rotation of the hinge member;
The display apparatus according to claim 1, wherein the display mode instruction unit determines the placement state based on a detection signal output from the angle detection unit. The display device according to claim 1,
Further comprising a swing detection means for detecting the swing of the display device;
The display mode instructing means determines the placement state based on a detection signal output from the swing detection means. The display device according to claim 2 or 3,
When the display state instruction means determines the previous placement state, compared to the case where the previous placement state is negatively determined, (1) increase display brightness, and (2) display the reproduced image flashy. Changing the setting value of the gradation characteristic, (3) changing the setting value of the saturation characteristic so that the reproduced image is displayed vividly, (4) enhancing the contour enhancement characteristic of the reproduced image, (5) When at least one of increasing the display size of the reproduced image is instructed to the display control means, and the negative determination is made on the above-described placement state, information accompanying the image data is displayed together with the reproduced image. A display device characterized by instructing the display control means. The display device according to claim 4,
A distance measuring means;
The display mode instruction means, when the distance information between the observer calculated by the distance measurement means corresponds to more than a predetermined distance, (1) the gradation characteristics so as to further display the reproduced image flashy Changing the setting value; (2) changing the setting value of the saturation characteristic so that the reproduced image is displayed more vividly; and (3) further enhancing the contour enhancement characteristic of the reproduced image. A display device characterized by instructing display control means. The display device according to claim 5,
The distance measuring means includes an imaging means,
The display apparatus, wherein the display mode instruction unit instructs the display control unit to change a color temperature adjustment value according to color temperature information calculated using an imaging signal from the imaging unit.

Images