JP2000089712A - Display device and display control method thereof - Google Patents

Abstract

(57) [Problem] To provide a display device that always provides a user with a table-integrated display device in an optimum state regardless of the state of the display device, and a display control method thereof. SOLUTION: The inclination of a display surface 3 of a display device 1 is detected,
The display brightness of the display surface 3 is adjusted according to the detected inclination of the display surface 3. If the display surface is facing up,
The display luminance is reduced, and when the display surface is in a vertical state, the display luminance is increased. With the above configuration, information is displayed in a state that is optimal for the user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a display control method thereof, and more particularly, to a display device having a function of adjusting luminance of a display screen and a display control method thereof.

[0002]

2. Description of the Related Art A display device in which a conventionally used flat type display device is incorporated in a table has been proposed (Japanese Patent Laid-Open No. 7-295483).

According to Japanese Patent Application Laid-Open No. 7-295483, the shape is as shown in FIG. In FIG.
Reference numeral 101 denotes a display screen. For example, when the display screen is used as a personal disk in an office or the like, it may be used to display personal information such as an individual's schedule and contact information when the user is away from the desk. It is also conceivable that a plurality of persons hold a meeting or the like surrounding the display device.

However, this display device has a fixed display surface, and can only turn the display surface upward.

[0005]

A conventional table-incorporated display device has a problem that the display device cannot be used effectively because the display surface is fixed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device that effectively utilizes a table-incorporated display device and a display control method for the display device.

Another object of the present invention is to provide a display device and a display control method for effectively performing display control based on the angle of a display surface.

[0008]

In order to achieve the above object, a display device according to the present invention is a display device having a function of adjusting the brightness of a display screen, comprising: a detecting means for detecting a tilt of the display screen; Adjusting means for adjusting the brightness of the display screen based on the result detected by the detecting means.

A display control method according to the present invention is a display control method for a display device having a function of controlling the brightness of the display screen of the display device. Controls the brightness of the display screen.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a functional block diagram of the display system of the present embodiment.

In FIG. 1, reference numeral 1 denotes a display device on which various information is displayed. The details will be described later.

Reference numeral 10 denotes a system main body, and a CPU 1
1, a memory 12, an image input unit 13, an input device 14, a display controller 15, and the like. The CPU 11 controls each block in the main body 10 based on a program stored in the memory 12 in advance. The memory 12 has a CPU
In addition to the programs executed by the CPU 11, storage of information such as image information input from the image input unit 13,
It is also used as one work area.

The image input unit 13 receives image information supplied via a communication line, television signals, and the like.
The input device 14 includes a keyboard, a mouse, and the like.
Perform input operations on the system. Display controller 1
5 performs various controls of the display device 1 under the control of the CPU 11.

FIG. 2 is a schematic diagram of the display device 1. FIG.
In FIG. 2, the display device 1 is connected to the main body 10 via a cable, but in FIG.
0 is omitted.

In FIG. 2, (a) is a view in which the display device 1 is set like a table with the display surface 3 facing upward, and (b) is a display device when the display surface 3 is set upright. 1
It is the figure seen from the back side. The display device 1 is supported by a support 2 having two feet, and the display 1 and the support 2 are connected by a connection unit 4.

In this embodiment, the display device 1 can hold the display surface 3 in a state where the display surface 3 is tilted at a desired angle, and can freely change the angle between FIGS. 2 (a) and 2 (b). be able to.

The display surface 3 of the display device 1 shown in FIG.
Since the display device 1 faces upward, when a small number of people surround the display device 1 and hold a meeting or the like, the display device 1 is used in this state. Since the display surface 3 of the display device 1 in (b) is in a vertical state, the display device 1 is used in this state when the display device is used as a television or when a conference is held with a large number of people.

Therefore, in the case of (a), the user is at a position close to the display device 1. On the other hand, in the case of (b), the user is at a relatively distant position. In general, when a person observing the display device is close to the display device, a relatively dark display screen is easier to see, and conversely, when it is far away, a relatively bright display screen is preferred.

Therefore, in the present embodiment, the direction of the display surface 3 is detected, and the luminance of the display surface 3 is automatically changed. That is, when the display surface 3 faces upward, the luminance is reduced, and when the display surface is in the vertical state, the luminance is increased.

In the present embodiment, the detection of the orientation of the display surface is performed by the detection means provided at the connection portion 4 between the display device and the support 2.

FIG. 3 is a detailed view of the vicinity of the connection section 4.
In FIG. 3, reference numeral 22 denotes a rotation axis serving as an axis of rotation when changing the direction of the display surface 3, reference numeral 23 denotes a rotation shaft support for connecting the rotation shaft 22 to the display device 1, and reference numerals 24 and 25 embed in the rotation shaft support 23. Reference numeral 26 denotes a conductor embedded in the rotating shaft 22, 27 denotes a current detection unit, 28 denotes a current detection wiring, and 29 denotes a DC power supply.

The rotation shaft 22 is fixed to the support 2. In FIG. 3, since the connection between the rotating shaft 22 and the support 2 is hidden by the rotating shaft support 23, the hidden portion of the support is shown by a dotted line. On the other hand, the rotation support section 23 is fixed to the display device 1.

In order to change the direction of the display surface 3, the rotation shaft support 23 and the display device 1 are rotated about the rotation shaft 22. The connecting portion is provided with a stopper (not shown). When the display device 1 is tilted at a desired angle, the display device 1 is held at the tilt by the stopper.

A conductor 26 is embedded in the rotating shaft 22, as shown in the figure. The portion of the rotating shaft 22 other than the conductor 26 is made of an insulator, and does not pass the battery. Conductor 26
Are both ends of the rotating shaft support portion 23 depending on the direction of the display surface 3.
Alternatively, it can be brought into contact with the electrodes 24 and 25.

Electrodes 24 and 25 are embedded in the rotation support portion 23 as shown in the figure. The portion of the rotary shaft support 24 other than the electrodes 24 and 25 is made of an insulator and does not conduct electricity. The electrodes 24 and 25 are connected to a current detection wiring 28. The electrodes 24 and 25 contact the end of the conductor 26 or the insulating portion of the rotating shaft 22 due to the inclination of the display surface 3.

The current detection wiring 28 is connected to the electrodes 24 and 25, and includes a DC power supply 29 and the current detection unit 2 on the way. Current wiring 28, DC power supply 29 and current detection unit 27
Exists inside the rotation shaft support portion 23 and the display device 1.

Next, the process of detecting the orientation of the display surface 3 will be described.

First, the case where the display surface 3 faces upward will be described with reference to FIG. At this time, the positional relationship between the conductor 26 and the electrodes 24 and 25 is as shown in (a), and the electrodes 24 and 25 are in a state where conduction cannot be established. As a result, no current flows through the current detection wiring 28, and no current is detected by the current detection unit 27.

Next, a case where the display surface 3 is in a vertical state will be described with reference to FIG. At this time, conductor 2
The positional relationship between 6 and the electrodes 24 and 25 is as shown in FIG.
The electrodes 24 and 25 are electrically connected by the conductor 26. As a result, a current flows through the current detection wiring 28 by the DC power supply 29, and the current is detected by the current detection unit 27.

That is, when the display surface 3 faces upward,
The current detection unit 27 does not detect the current, and when the display surface 3 is in the vertical state, the current detection unit 27 detects the current. Thus, the direction of the display surface 3 can be detected.

From the information on the orientation of the display surface 3 detected in this way, the display brightness is adjusted by the brightness adjustment unit of the display device 1. That is, when the display surface 3 faces upward, the brightness is reduced, and when the display surface 3 is in the vertical state, the brightness is increased. Therefore,
When a meeting or the like is performed with a small number of people around the display device 1, the display brightness is reduced to make the screen easier to see. In addition, when used in a normal television or a large number of people, the display brightness is increased.

Next, a method of adjusting the luminance will be described with reference to a display device using a surface conduction electron-emitting device as an example.

FIG. 4 is a sectional view of a display device using a surface conduction electron-emitting device. In the figure, reference numeral 30 denotes a surface conduction electron-emitting device, 31 denotes an electron-emitting portion, 32 denotes a rear plate, 33 denotes a face plate, and 34 denotes a fluorescent film.

The display device 1 has a multi-electron source in which the emission elements 30 are arranged in a matrix on the rear plate 32. Then, the electrons emitted from the electron emitting section 31 are irradiated on the fluorescent film 34 applied on the face plate 33 to display an image.

The observer observes the image displayed on the display surface 3. At this time, the face plate 33
The electron acceleration voltage Va is applied between the rear plate 34 and the rear plate 34. By changing this Va, the display luminance can be adjusted. That is, the display luminance increases when the acceleration voltage Va is increased, and the display luminance decreases when the acceleration voltage Va is decreased.

In this embodiment, when the display surface 3 is facing upward, the brightness is reduced, and when the display surface 3 is in the vertical state, the brightness is increased. Therefore, the current detection unit 27
If the current is not detected in the above, the acceleration voltage Va is lowered, and if the current is detected, the acceleration voltage Va is raised.

As described above, the luminance of the display surface 3 is adjusted by changing Va according to the signal from the current detector 27.

The method of adjusting the luminance is not limited to this, but may be any of various other methods, for example, by transferring the detection result of the current detecting section 27 to the display controller 15 and by controlling the amplitude of the video signal supplied from the display controller 15 itself. May be changed.

(Other Embodiment) As another embodiment, a case where a means for detecting the orientation of the display surface 3 is provided in the display device 1 will be described.

Basically, the schematic diagram of the display device is the same as that of FIG. 2, and in the present embodiment, the case where the means for detecting the orientation of the display surface 3 is a pendulum type detection unit will be described. I do.

FIG. 5 is a cross-sectional view of a display device near a detection unit according to another embodiment. FIG. 5A shows the display surface 3.
Indicates a case in which the display surface is facing upward, and (b) indicates a case in which the display surface is in a vertical state.

In the figure, 51 is a fulcrum of a pendulum,
52 is a pendulum, 53 is a current detection unit, 54 is a DC power supply, 55 is an electrode, 56 is a current detection wiring, and 57 is a space in which the pendulum swings.

The fulcrum 51 is connected to the current detection wiring 56. The pendulum 52 moves in the direction of the arrow due to gravity,
Can swing. The fulcrum 51 and the pendulum 52 are made of a conductor. The pendulum 52 functions as a switch. The electrode 55 forms one surface forming a space 57, and is connected to the current detection wiring 56.

When the display surface 3 faces upward as shown in FIG. 5A, no current flows through the current detection wiring 56 because the pendulum 52 and the electrode 55 are not in contact with each other. (B)
When the display surface 3 is in a vertical state as shown in FIG.

That is, when the current is not detected by the current detector 53, the display surface 3 is directed upward, and when the current is detected, the display surface is in a vertical state.

The luminance is adjusted based on such a signal from the current detector 53. That is, if the current is not detected by the current detection unit 53, the luminance is lowered, and if the current is detected, the luminance is raised. This brightness adjustment is performed by using Va as described above.
It can be done by:

As described above, according to the present embodiment, the display device can be used as a display device with a built-in table, and can be used as a normal television, so that the display device can be effectively used. .

Further, the orientation of the display surface is detected, and if the display surface is facing upward, it is determined that the user is at a position close to the screen, and the screen brightness is reduced. When the display surface is in a vertical state, it is determined that the user is far from the screen, and the screen brightness is adjusted so as not to be high. for that reason,
It is possible to always maintain a state that is easy for the user to see.

[0050]

As described above, according to the present invention, since the brightness of the screen can be adjusted depending on the orientation of the display surface, it is possible to provide a state where the user can easily see the display surface.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a display system according to an embodiment.

FIG. 2 is a schematic diagram of the display device 1.

FIG. 3 is a detailed view of the vicinity of a connection unit 4;

FIG. 4 is a sectional view of a display device using a surface conduction electron-emitting device.

FIG. 5 is a cross-sectional view of a display device near a detection unit according to another embodiment.

FIG. 6 is a diagram showing a conventional table-incorporated display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display device 2 Support base 3 Display surface 4 Connection part 10 Main body 11 CPU 12 Memory 13 Image input part 14 Input device 15 Display controller 22 Rotation axis 23 Rotation axis support part 24 Electrode 25 Electrode 26 Conductor 27 Current detection part 28 Current detection wiring 29 DC power supply

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 5/10 G09G 5/10 B H04N 5/66 H04N 5/66 A (72) Inventor Yukio Masuda Tokyo 3-30-2 Shimomaruko, Ota-ku Canon Term Co., Ltd. F-term (reference) GG01 GG02 GG08 GG09 JJ02 JJ06 5C082 AA01 AA02 BA02 BA12 BA41 BB15 CA11 CA42 CA81 CB01 DA51 MM10

Claims (6)

[Claims] 1. A display device having a function of adjusting the brightness of a display screen, comprising: detecting means for detecting an inclination of the display screen; and adjusting the brightness of the display screen based on a result detected by the detecting means. A display device, comprising: an adjusting unit that adjusts the image. 2. The detecting means detects whether the display screen is in a horizontal state or a vertical state, and the adjusting means determines the luminance when the display screen is in a vertical state, and determines whether the display screen is in a vertical state. The display device according to claim 1, wherein the luminance is higher than the luminance in a horizontal state. 3. The display device according to claim 1, wherein the display device is connected to a support, and the detection unit is installed at a connection portion with the support. 4. The display device according to claim 1, further comprising a supply unit that supplies information to be displayed on the display screen. 5. A display control method for a display device having a function of controlling the luminance of the display screen of the display device, wherein the inclination of the display screen is detected, and the luminance of the display screen is controlled based on the detection result. The display control method characterized by the above-mentioned. 6. The display device according to claim 5, wherein whether the display screen is in a horizontal state or a vertical state is detected, and the luminance in the vertical state is made higher than the luminance in the horizontal state. Display control method described in 1.