JPH08179275A - Display device and its driving control method - Google Patents

Abstract

PURPOSE: To provide a display device capable of displaying a video, etc., for a longer time even when the remaining of a power supply capacitance becomes small. CONSTITUTION: The voltage of a power supply 20 is detected by a power supply voltage detecting part 22 and in the case where the voltage is equal to or lower than a reference value as the result, a control part 19 judges a dominant eye from the output of a dominant eye setting part 23 in a step 13 and in the case where the dominant eye is the left eye as the result, the part 19 stops the LCD driving part for the right eye 14 and the back light driving part for the right eye 18 being opposite to the domonant eye. In the case where the dominant eye is the right eye, the part 19 stops the LCD driving part for the left eye 13 and the back light driving part for the left eye 17 being opposite to the dominant eye. Moreover, in the case where the voltage of the power supply 20 is equal to or higher than a prescrived value, a normal display is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device which is worn on the head or face and which can be viewed on a plurality of displays provided on the device, and a drive control of the display when the power supply voltage drops. The present invention relates to an improved drive control method for a display device.

[0002]

2. Description of the Related Art In recent years, with the diversification of hardware / software such as packaged video and games using computer graphics, home-use televisions, projectors, portable LCD televisions, head mounts for virtual reality are used as display devices. Display, etc.
Various forms have been demanded depending on the place to enjoy the software and the situation, and head-mounted displays such as goggles worn on the head have been proposed.

FIG. 7 is a diagram showing the appearance of a conventional head-mounted display.

This head-mounted display uses two small liquid crystal display panels (LCDs) to display an image for each of the left and right eyes. A virtual image can be displayed as if there is a 30-inch TV 1 m away. Therefore, it is possible to enjoy as if watching a large-screen TV on a small device.

In the figure, 101 is an exterior cover, 10
Reference numerals 2 and 103 are display units for the left and right eyes. An image is transferred to a small LCD by a display panel drive circuit (not shown). Also, a stereoscopic screen can be reproduced by displaying an image with an appropriate parallax for each of the left eye and the right eye.

In such a head-mounted display, a small battery is built in the main body of the apparatus, or the power supply section is separated from the main body of the apparatus and the power supply section is held by, for example, a waist with a belt,
Some use a battery as a power source.

[0007]

However, the above-mentioned conventional display device has the following problems.

A head-mounted display using a battery as a power source is different from the case where power is supplied from a household outlet or the like, and when the voltage of the battery falls below a certain level, that is, when the battery becomes empty, the device is powered on. It is no longer supplied and the device cannot perform its function.

In the conventional head-mounted display, the display means for both the left and right eyes are driven to display even when the battery capacity is low, so that the battery can be emptied quickly and the device can be used quickly. become unable. Therefore, sometimes I could not watch the software until the end.

In view of the above-mentioned conventional problems, it is an object of the present invention to provide a display device capable of displaying an image or the like for a longer period of time when the remaining power capacity is low, and a drive control method thereof. To do.

[0011]

In order to achieve the above object, the display device of the first invention comprises a plurality of display means for displaying image or character information, and a display control means for controlling the plurality of display means. A power supply voltage detecting means for detecting a power supply voltage of the device, the power supply voltage detecting means comprising: a power supply voltage detecting means for detecting a power supply voltage of the device; Voltage comparing means for comparing the voltage detected by the detecting means with a predetermined value, and when the voltage detected by the power supply voltage detecting means is lower than the predetermined value, at least one of the displaying means is provided. The driving of the display means is stopped and the remaining display means are driven.

A display device according to a second aspect of the present invention has a plurality of display means for displaying image or character information and a display control means for controlling the plurality of display means, and displays the image or the image displayed on the display means. In a display device to be worn on the head or face for viewing textual information, a power supply voltage detecting means for detecting a power supply voltage of the device and a voltage detected by the power supply voltage detecting means are compared with a predetermined value. And a voltage comparing means for operating the remaining display means while stopping at least one of the display means when the voltage detected by the power supply voltage detecting means is lower than the predetermined value. The power saving mode and the normal mode for driving all of the display means are selectable.

A display device according to a third aspect of the invention is a display device for the left and right eyes, which is arranged corresponding to the left and right eyes of a user and displays image or character information, and the display device for the left and right eyes. A display control means for controlling the means, wherein the display device is used by being worn on the head or face for viewing the image or character information displayed on the display means for the left eye and the right eye. A power supply voltage detecting means for detecting a power supply voltage, and a voltage comparing means for comparing the voltage detected by the power supply voltage detecting means with a predetermined value, and the voltage detected by the power supply voltage detecting means is the predetermined value. If it is lower than that, only one of the left-eye display means and the right-eye display means is driven.

A display device according to a fourth aspect of the present invention is arranged so as to correspond to the left and right eyes of a user, respectively, and display means for the left and right eyes for displaying image or character information, and display for the left and right eyes. A display control means for controlling the means, wherein the display device is used by being worn on the head or face for viewing the image or character information displayed on the display means for the left eye and the right eye. A power supply voltage detecting means for detecting a power supply voltage, and a voltage comparing means for comparing the voltage detected by the power supply voltage detecting means with a predetermined value, and the voltage detected by the power supply voltage detecting means is the predetermined value. When lower than the above, the power saving mode for driving one of the left-eye and right-eye display means and the normal mode for driving both the left-eye and right-eye display means are configured to be selectable. It is a thing.

In the display device of the fifth invention, in the above-mentioned third or fourth invention, when one of the left-eye display means and the right-eye display means is driven, the driving display means is driven by the user. The display means is set on the dominant eye side.

A display device of a sixth invention is the display device of the fifth invention, wherein the display means on the dominant eye side is set by a switch provided in the device.

A drive control method for a display device according to a seventh aspect of the invention is
It has a plurality of display means for displaying image or character information, and a display control means for controlling the plurality of display means, and a head or a face for viewing the image or character information displayed on the display means. A power supply voltage detection process for detecting the power supply voltage of the display device to be mounted and used, a voltage comparison process for comparing the voltage detected by the power supply voltage detection process with a predetermined value, and a power supply voltage detection process When the voltage is lower than the predetermined value, the driving of at least one of the display means is stopped and the display drive processing of driving the remaining display means is executed. is there.

A drive control method for a display device according to an eighth aspect of the invention is
It has a plurality of display means for displaying image or character information, and a display control means for controlling the plurality of display means, and a head or a face for viewing the image or character information displayed on the display means. The power supply voltage detection processing for detecting the power supply voltage of the display device to be mounted and used, the voltage comparison processing for comparing the voltage detected by the power supply voltage detection processing with a predetermined value, and the power supply voltage detection processing When the voltage is lower than the predetermined value, either the power saving mode in which at least one display means among the display means is stopped and the remaining display means is driven or the normal mode in which all of the display means are driven A mode selection process for selecting one or the other is executed.

A drive control method for a display device according to the ninth invention is
Arranged corresponding to the left and right eyes of the user, respectively, having a left eye and right eye display means for displaying an image or character information, and a display control means for controlling the left eye and right eye display means, Power supply voltage detection processing for detecting a power supply voltage of a display device to be worn on the head or face for viewing the image or character information displayed on the display means for the left and right eyes, and the power supply voltage detection In the voltage comparison process of comparing the voltage detected in the process with a predetermined value, if the voltage detected in the power supply voltage detection process is lower than the predetermined value, among the display means for the left eye and the right eye. The display driving process for driving only one of them is executed.

According to a tenth aspect of the present invention, there is provided a drive control method for a display device, which is arranged corresponding to the left and right eyes of a user, and which displays the left and right eyes and displays image or character information.
A display control means for controlling the display means for the left eye and the right eye, and is mounted on the head or face for viewing the image or character information displayed on the display means for the left eye and the right eye. The power supply voltage detection processing for detecting the power supply voltage of the display device used, the voltage comparison processing for comparing the voltage detected by the power supply voltage detection processing with a predetermined value, the voltage detected by the power supply voltage detection processing is If lower than a predetermined value, one of the power saving mode for driving one of the left-eye and right-eye display means and the normal mode for driving both the left-eye and right-eye display means A mode selection process for selecting one of them is executed.

An eleventh aspect of the present invention is a drive control method for a display device according to the ninth or tenth aspect of the invention, wherein when any one of the left eye display means and the right eye display means is driven, the display means is driven. Is set so as to be the display means on the dominant eye side of the user.

According to a twelfth aspect of the present invention, in the drive control method for a display device according to the eleventh aspect, the display means on the dominant eye side is set by a switch provided in the device.

[0023]

According to the display device of the first aspect of the present invention, when at least the voltage detected by the power supply voltage detection means is lower than a predetermined value, at least one of the display means is driven. Since the display means is stopped and the remaining display means is driven, when the power supply capacity becomes low, the power consumption is reduced as compared with the normal drive, and the time is longer.
It becomes possible to display images and the like.

According to the display device of the second invention, when the voltage detected by the power supply voltage detection means is lower than a predetermined value, at least one of the plurality of display means is stopped and the remaining display means is left. The power saving mode for driving the display means and the normal mode for driving all of the display means can be selected. Therefore, when the power capacity is low, the power saving mode can be selected for a longer period of time when the user wants to view an image or the like. The normal mode can be selected when it is desired to see the mode or the display as in the normal drive. When the power saving mode is selected, an image or the like is displayed for a longer time than when the normal driving is performed, and when the normal mode is selected, the image can be viewed by the normal driving.

According to the display device of the third invention, when the voltage detected by the power supply voltage detecting means is lower than a predetermined value, only one of the left eye display means and the right eye display means is driven. Therefore, when the remaining power capacity is low, power is saved compared to driving both the left-eye and right-eye display units, and it is possible to display an image or the like for a longer time.

According to the display device of the fourth aspect of the present invention, when the voltage detected by the power supply voltage detecting means is lower than a predetermined value, one of the display means for the left eye or the right eye is driven. The power saving mode and the normal mode for driving both the left-eye and right-eye display means can be selected. Therefore, when the power capacity is low, it is possible to save power when viewing images for a longer time. The normal mode can be selected when it is desired to see the mode or the display as in the normal drive. When the power saving mode is selected, an image or the like is displayed for a longer time than when the normal driving is performed, and when the normal mode is selected, the image can be viewed by the normal driving.

According to the display device of the fifth invention, when either one of the display means for the left eye and the display means for the right eye is driven (when one eye is displayed), the driven display means is the side of the dominant eye of the user. Since it is set to be the display means of, the image can be easily viewed when displaying with one eye.

According to the display device of the sixth aspect of the invention, since the display means on the dominant eye side is set by the switch provided in the device, it is possible to easily set whether the user's dominant eye is the left or right side. Will be able to.

According to the drive control method for a display device of the seventh invention, a power supply voltage detecting process for detecting the power supply voltage of the display device and a voltage for comparing the voltage detected by the power supply voltage detecting process with a predetermined value. When the voltage detected by the comparison process and the power supply voltage detection process is lower than the predetermined value, driving of at least one display unit among the display units is stopped and the remaining display units are driven. Since the display driving process is performed, power consumption is reduced as compared with the case where normal driving is performed when the remaining capacity of the power supply is low, and it becomes possible to display an image or the like for a longer time.

According to the drive control method of the display device of the eighth invention, the power supply voltage detection process for detecting the power supply voltage of the display device and the voltage for comparing the voltage detected by the power supply voltage detection process with a predetermined value. When the voltage detected by the comparison process and the power supply voltage detection process is lower than the predetermined value,
A mode selection process that makes it possible to select either one of a power saving mode in which at least one of the display units is stopped and the remaining display units are driven, and a normal mode in which all of the display units are driven. Since it is executed, you can select the power saving mode when you want to view images for a longer time when the power supply capacity is low, and you can select the normal mode when you want to see the display like normal driving. . When the power saving mode is selected, an image or the like is displayed for a longer time than when the normal driving is performed, and when the normal mode is selected, the image can be viewed by the normal driving.

According to the drive control method for a display device of the ninth invention, a power supply voltage detection process for detecting the power supply voltage of the display device and a voltage for comparing the voltage detected by the power supply voltage detection process with a predetermined value. A comparison process and a display drive process of driving only one of the left-eye display unit and the right-eye display unit when the voltage detected by the power supply voltage detection process is lower than the predetermined value Therefore, when the remaining power capacity is low, power is saved compared to driving both the left-eye and right-eye display units, and it is possible to display an image or the like for a longer time.

According to the drive control method for a display device of the tenth invention, a power supply voltage detection process for detecting a power supply voltage of the display device and a voltage for comparing the voltage detected by the power supply voltage detection process with a predetermined value. When the voltage detected by the comparison process and the power supply voltage detection process is lower than the predetermined value, the power saving mode for driving one of the left eye and right eye display means and the left eye and Since the normal mode for driving both the display means for the right eye and the mode selection processing for enabling selection of either one are executed, it is desired to view an image or the like for a longer time when the power supply capacity becomes low. The power saving mode can be selected at this time, and the normal mode can be selected when the display is desired to be viewed as in the case of normal driving. When the power saving mode is selected, an image or the like is displayed for a longer time than when the normal driving is performed, and when the normal mode is selected, the image can be viewed by the normal driving.

According to the drive control method for a display device of the eleventh invention, when any one of the left-eye display means and the right-eye display means is driven, the driven display means is the display means on the dominant eye side of the user. Since it is set so that the image is easy to see when displaying with one eye.

According to the drive control method for a display device of the twelfth invention, since the display means on the dominant eye side is set by the switch provided in the device, it is easy to determine which of the user's dominant eye is right and left. Will be able to set.

[0035]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of a display device according to the first embodiment of the present invention.

This display device is a head-mounted display that is used by mounting it on the user's head. It uses two small liquid crystal display panels (LCD) to display images for the left and right eyes respectively. To do. By enlarging the display using a lens, a virtual image can be displayed as if there is a 30-inch type television about 1 m ahead.

In FIG. 1, reference numeral 1 denotes an exterior cover that encloses the entire apparatus. On the top of the exterior cover 1, there is provided a forehead support 2 for applying the user's forehead when wearing it. A fixing band 3 is provided for fixing the device to the head of the user when the device is worn.

Further, a dominant eye setting switch 4 for setting whether the user's dominant eye is the left eye or the right eye is provided on the outer cover 1 near the forehead support 2. Here, the dominant-eye setting switch 4 is a slide switch, and is arranged so as to be slidable in the left-right direction.

The front part of the outer cover 1 has a goggle shape, and the left-eye display section 5 composed of a lens, a small LCD and a backlight is provided at positions corresponding to the left and right eyes of the user. And a display unit 6 for the right eye are provided.

According to this head mounted display, an image is displayed on a small LCD by an LCD drive circuit described later. The forehead pad 2 is fixed to the head by the fixing band 3, and the device is attached so that the left and right display units 5 and 6 are respectively placed in front of the left and right eyes, and the image is viewed. Although the mechanism is not shown in the figure, the distance between the left and right display portions 5 and 6 can be adjusted according to the eye width of the user of the apparatus, and the left and right display portions 5 and 6 can be adjusted for diopter adjustment. A mechanism is attached so that the user of the device can see an easy-to-see image suitable for himself.

FIG. 2 is a block diagram showing the configuration of the display device of this embodiment.

Reference numerals 11 and 12 in the figure denote LCDs for the left and right eyes.
The left-eye and right-eye LCDs 11 and 12 are driven by the left-eye and right-eye LCD drive units 13 and 14, respectively. Furthermore, the LCD 1 for the left and right eyes
Backlights 1 for the left and right eyes are provided on the back side of 1 and 12.
5, 16 are provided respectively. LCD 11 for left eye
The left-eye backlight 15 constitutes the left-eye display section 5, and the right-eye LCD 12 and the right-eye backlight 16 constitute the left-eye display section 6. The left-eye and right-eye backlights 15 and 16 are driven by the left-eye and right-eye backlight driving units 17 and 18, respectively.

These left-eye and right-eye LCD drive units 13,
The left-eye and right-eye backlight driving units 17 and 18 are connected to a control unit 19 that controls the operation of the entire apparatus. In addition, the power source 20 that supplies power to the entire device,
The power supply voltage conversion unit 21 and the power supply voltage detection unit 22 are connected,
The power supply voltage converter 21 and the power supply voltage detector 22 are connected to the controller 19.

Further, the control unit 19 includes a dominant eye setting unit 2
3 is connected. The dominant eye setting unit 23 slides the dominant eye setting switch 4 to the dominant eye side, that is, when the right eye is the dominant eye, moves it to the right side, and when the left eye is the dominant eye, moves it to the left side, and outputs it. Is sent to the control unit 19, and the control unit 10 determines the dominant eye.

The power supply voltage conversion unit 21 includes L for the left eye and L for the right eye.
CD drive units 13 and 14, backlight drive units 17 and 1
8, the control unit 19, and the dominant eye setting unit 23 to the power source 2
A switching regulator and a control terminal for externally controlling the operation thereof are provided to convert each voltage of 0 into an appropriate voltage and supply the voltage. Power supply voltage detector 2
2 has a function of detecting the voltage of the power supply 20 and comparing it with a predetermined reference value. The power supply voltage detecting unit 22 measures the voltage value of the power supply 20 by connecting a load such as a resistor to the power supply 20 and energizing the power supply 20, compares the voltage value with a predetermined reference value, and outputs the magnitude relationship. In some cases, the power supply voltage may be converted from analog to digital and sent to the control unit 19, and the control unit 19 may compare it with a predetermined reference value.

Video signal input units 24 and 25 for receiving left and right video signals are connected to the left-eye and right-eye LCD drive units 13 and 14, respectively.

Next, the operation of this embodiment will be described with reference to the flow chart shown in FIG.

First, the power supply voltage detector 22 detects the voltage of the power supply 20 (step S11). As a result, if the voltage of the power supply 20 is below the reference value (YES in step S12), step S13. Go to. In step S13, the output from the dominant eye setting unit 23 is changed to the control unit 19
If the dominant eye is the left eye (YES in step S13), the LCD driver 14 for the right eye and the backlight driver 18 for the right eye opposite to the dominant eye are determined. Stop (step S14).

On the other hand, when the dominant eye is the right eye (NO in step S13), the left eye LCD drive unit 13 and the left eye backlight drive unit 17 opposite to the dominant eye are stopped (step S15). . Further, when the voltage of the power supply 20 is equal to or higher than the predetermined value (NO in step S12), normal display is performed, the process returns to the detection of the voltage of the power supply 20 (step S11), and the power supply voltage is continuously detected.

As described above, in the head-mounted display of this embodiment, when the voltage of the battery becomes lower than the predetermined value, only the display section on the dominant eye side is driven and the display section on the other side is driven. Since the display is stopped, the image can be viewed for a longer time when the battery is almost empty, compared to the case where both display units are driven. By switching the dominant eye setting switch 4, it is possible to easily set the dominant eye, and moreover, it is possible to immediately recognize at a glance which one of the dominant eyes is set. In addition, even after the device is mounted, the setting state can be confirmed or set by the fumbling. And because I made it possible to set the dominant eye,
The display of only one display section can be seen by the dominant eye, so that the image is easy to see and the user is less tired.

FIG. 4 is an external perspective view of a display device according to the second embodiment of the present invention, and FIG. 5 is a block diagram showing the configuration of the display device of the present embodiment. The same elements as those in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.

The display device of this embodiment is different from that of the first embodiment described above in that the mode selection switch 31 (mode setting unit 4) for selecting either the power saving mode or the normal mode.
1) is provided, and the control section 19 takes in the output thereof to determine which mode is selected. That is, the mode selection switch 31
With this, it is possible to select which of the power saving mode and the normal mode the image is viewed when the power supply voltage becomes lower than a predetermined value.

The power saving mode is a mode for viewing an image for a longer time when the power supply voltage becomes lower than a predetermined value, and is switched to only the display on the dominant eye side when the power supply voltage drops. However, even if the image at this time is a stereoscopic image due to the left and right parallax, only the image on the dominant eye side is displayed, and thus the stereoscopic image cannot be viewed.

The normal mode is a mode in which an image is viewed in the same manner as normal even when the power supply voltage becomes lower than a predetermined value, and both the left and right eye display units 5 and 6 are driven. Therefore, a stereoscopic image can be viewed. However, since the power is consumed quickly, the battery will be empty soon. The power saving mode is a mode that is effective when you want to view the image for a longer time even if you cannot view the stereoscopic image, for example. This mode is effective when you want to see with both eyes.

Next, the operation of this embodiment will be described with reference to the flow chart shown in FIG.

First, the power supply voltage detector 22 detects the voltage of the power supply 20 (step S21). As a result, when the voltage of the power supply 20 is less than or equal to the reference value (YES in step S22), the mode setting unit 41 causes the control unit 19 to operate.
Determines the mode (step S23).

When the mode is the power saving mode (YES in step S23), the control unit 19 determines the dominant eye from the output of the dominant eye setting unit 23 (step S24). As a result, when the dominant eye is the left eye (Y in step S24)
ES), the LCD drive unit 14 and the backlight drive unit 18 for the right eye opposite to the dominant eye are stopped (step S2).
5). When the dominant eye is the right eye (N in step S24)
O), the LCD drive unit 13 and the backlight drive unit 17 for the left eye opposite to the dominant eye are stopped (step S26).

When the mode is the normal mode (NO in step S23), the control unit 19 continues to drive the LCD drive units 13 and 14 and the backlight drive units 17 and 18 for both the left and right eyes. Yes (step S27).
Further, when the voltage of the power source 20 is equal to or higher than the predetermined value (NO in step S22), the normal display is performed and the power source 2 is turned on again.
Returning to the detection of the voltage of 0 (step S21), the power supply voltage is continuously detected.

As described above, in the head-mounted display of this embodiment, when the battery voltage becomes lower than the predetermined value, only the display section on the dominant eye side is driven and the other display section is driven. It is possible to select a power saving mode in which it is stopped and a normal mode in which both the left and right eye display units 5 and 6 are driven as usual when the battery voltage becomes lower than a predetermined value. ing. Therefore, for example, even if the stereoscopic image cannot be viewed stereoscopically, if you want to view the image for a longer period of time, you can select the power saving mode and watch the image for a longer period of time. When you want to stereoscopically view a stereoscopic image with both eyes, you can see the image as it is. In addition, when the power saving mode is selected, the dominant eye can be set and the display of only one display section can be viewed with the dominant eye, so that the image is easy to see and the user is less tired.

[0061]

As described in detail above, according to the display device of the first aspect of the invention, when the voltage detected by the power supply voltage detection means is lower than a predetermined value, at least one of the plurality of display means is selected. Since the driving of one display unit is stopped and the remaining display units are driven, it is possible to display an image or the like for a longer time when the power supply capacity is low. Therefore, it is less likely that an image or the like cannot be seen to the end due to battery exhaustion, and usability of the device is improved.

According to the display device of the second invention, when the voltage detected by the power supply voltage detection means is lower than a predetermined value, at least one of the plurality of display means is stopped and the remaining display means is stopped. Since the power saving mode for driving the display means and the normal mode for driving all of the display means are selectable, even when the power capacity is low,
The image or the like can be displayed for a longer time depending on the selection of the user. Therefore, it is less likely that an image or the like cannot be seen to the end due to battery exhaustion, and usability of the device is improved.

According to the display device of the third invention, when the voltage detected by the power supply voltage detecting means is lower than a predetermined value, only one of the left eye and right eye displaying means is driven. With this configuration, it is possible to display an image or the like for a longer time even when the power supply capacity is low. Therefore, it is less likely that an image or the like cannot be seen to the end due to battery exhaustion, and usability of the device is improved.

According to the display device of the fourth invention, when the voltage detected by the power supply voltage detection means is lower than a predetermined value, one of the display means for the left eye and the display means for the right eye is saved. The power mode and the normal mode for driving both the left-eye and right-eye display means are selectable, so that even when the power capacity is low, the user can select a longer time to display images, etc. can do. Therefore, it is less likely that an image or the like cannot be seen to the end due to battery exhaustion, and usability of the device is improved.

According to the display device of the fifth aspect of the invention, when either one of the display means for the left eye and the display means for the right eye is driven, the display means to be driven is set to be the display means on the dominant eye side of the user. Therefore, the image can be easily viewed when displaying with one eye, and the user's fatigue is reduced.

According to the display device of the sixth aspect of the present invention, since the display means on the dominant eye side is set by the switch provided in the device, it is easy to set whether the dominant eye of the user is the left or right. You can In addition, it is easy to distinguish which dominant eye is set, and it is easy to find out which dominant eye is set even when the device is installed, and to set the dominant eye by feeling Will also be possible.

According to the drive control method for a display device of the seventh invention, a power supply voltage detection process for detecting the power supply voltage of the display device and a voltage for comparing the voltage detected by the power supply voltage detection process with a predetermined value. When the voltage detected by the comparison process and the power supply voltage detection process is lower than the predetermined value, driving of at least one display unit among the display units is stopped and the remaining display units are driven. Since the display driving process is performed, it is possible to display an image or the like for a longer time when the power supply capacity is low. Therefore,
It is less likely that you will not be able to see the image or the like due to the battery exhaustion, and the usability of the device will be improved.

According to the drive control method of the display device of the eighth invention, the power supply voltage detection process for detecting the power supply voltage of the display device and the voltage for comparing the voltage detected by the power supply voltage detection process with a predetermined value. When the voltage detected by the comparison process and the power supply voltage detection process is lower than the predetermined value,
A mode selection process that makes it possible to select either one of a power saving mode in which at least one of the display units is stopped and the remaining display units are driven, and a normal mode in which all of the display units are driven. Since the execution is performed, even when the power supply capacity is running low, it is possible to display an image or the like for a longer time depending on the user's selection. Therefore, it is less likely that an image or the like cannot be seen to the end due to battery exhaustion, and usability of the device is improved.

According to the drive control method for a display device of the ninth invention, a power supply voltage detection process for detecting the power supply voltage of the display device and a voltage for comparing the voltage detected by the power supply voltage detection process with a predetermined value. A comparison process and a display drive process of driving only one of the left-eye display unit and the right-eye display unit when the voltage detected by the power supply voltage detection process is lower than the predetermined value Therefore, it is possible to display an image or the like for a longer time even when the power supply capacity is low. Therefore, it is less likely that an image or the like cannot be seen to the end due to battery exhaustion, and usability of the device is improved.

According to the drive control method for a display device of the tenth invention, a power supply voltage detecting process for detecting a power supply voltage of the display device and a voltage for comparing the voltage detected by the power supply voltage detecting process with a predetermined value. When the voltage detected by the comparison process and the power supply voltage detection process is lower than the predetermined value, the power saving mode for driving one of the left eye and right eye display means and the left eye and Since the mode selection process that enables selection of either one of the normal mode for driving both the display units for the right eye and the selection is performed by the user even when the power capacity is low, a longer time, Images, etc. can be displayed. Therefore,
It is less likely that you will not be able to see the image or the like due to the battery exhaustion, and the usability of the device will be improved.

According to the drive control method of the display device of the eleventh invention, when either one of the display means for the left eye and the display means for the right eye is driven, the driven display means is the display means on the dominant eye side of the user. Since it is set so that the image is easy to see during the single-eye display, the user's fatigue is reduced.

According to the drive control method for a display device of the twelfth aspect of the invention, since the display means on the dominant eye side is set by the switch provided in the device, it is easy to determine which of the user's dominant eye is the left or right eye. Can be set. In addition, it is easy to distinguish which dominant eye is set, and it is easy to find out which dominant eye is set even when the device is installed, and to set the dominant eye by feeling Will also be possible.

[Brief description of drawings]

FIG. 1 is an external perspective view of a display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a display device of a first embodiment.

FIG. 3 is a flowchart showing an operation of the display device of the first embodiment.

FIG. 4 is an external perspective view of a display device according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a display device of this embodiment.

FIG. 6 is a flowchart showing an operation of the display device of the second embodiment.

FIG. 7 is a diagram showing an appearance of a conventional head-mounted display.

[Explanation of symbols]

 1 Exterior cover 2 Forehead support 3 Fixed band 4 Dominance eye setting switch 5 Left eye display section 6 Right eye display section 11, 12 Left eye and right eye LCD 13, 14 Left eye and right eye LCD drive section 15, 16 Left-eye and right-eye backlight 17,18 Left-eye and right-eye backlight drive unit 19 Control unit 20 Power supply 21 Power supply voltage conversion unit 22 Power supply voltage detection unit 23 Dominance eye setting unit 24, 25 Video signal input unit 31 Mode selection switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication G09G 3/36

Claims (12)

[Claims] 1. A plurality of display means for displaying image or character information, and a display control means for controlling the plurality of display means, for viewing the image or character information displayed on the display means. A display device to be worn on the head or face, comprising power supply voltage detection means for detecting the power supply voltage of the device, and voltage comparison means for comparing the voltage detected by the power supply voltage detection means with a predetermined value. When the voltage detected by the power supply voltage detection means is lower than the predetermined value, driving of at least one display means of the display means is stopped and the remaining display means are driven. A display device characterized by. 2. A plurality of display means for displaying image or character information, and a display control means for controlling the plurality of display means, for viewing the image or character information displayed on the display means. A display device to be worn on the head or face, comprising power supply voltage detection means for detecting the power supply voltage of the device, and voltage comparison means for comparing the voltage detected by the power supply voltage detection means with a predetermined value. A power-saving mode for stopping at least one display means of the display means and driving the remaining display means when the voltage detected by the power supply voltage detection means is lower than the predetermined value; A display device characterized by being configured such that a normal mode for driving all of the above can be selected. 3. A display unit for the left and right eyes, which is arranged corresponding to each of the left and right eyes of the user and displays image or character information, and a display control unit for controlling the display unit for the left and right eyes. And a display device which is used by being worn on the head or face for viewing the image or character information displayed on the left-eye and right-eye display means, the power supply voltage for detecting the power supply voltage of the device. A detection means; and a voltage comparison means for comparing the voltage detected by the power supply voltage detection means with a predetermined value, wherein the voltage detected by the power supply voltage detection means is lower than the predetermined value, A display device characterized in that only one of the display means for the left eye and the display means for the right eye is driven. 4. A display unit for the left and right eyes, which is arranged respectively corresponding to the left and right eyes of the user and displays image or character information, and a display control unit for controlling the display unit for the left and right eyes. And a display device which is used by being worn on the head or face for viewing the image or character information displayed on the left-eye and right-eye display means, the power supply voltage for detecting the power supply voltage of the device. A detection means; and a voltage comparison means for comparing the voltage detected by the power supply voltage detection means with a predetermined value, wherein the voltage detected by the power supply voltage detection means is lower than the predetermined value, A display device characterized in that a power saving mode for driving one of the left-eye and right-eye display means and a normal mode for driving both the left-eye and right-eye display means are selectable. . 5. When the display means for the left eye or the right eye is driven, the driving display means is set to be the display means on the dominant eye side of the user. The display device according to claim 3 or 4. 6. The display device according to claim 5, wherein the display unit on the dominant eye side is configured to be set by a switch provided in the device. 7. A plurality of display means for displaying the image or character information and a display control means for controlling the plurality of display means are provided for viewing the image or character information displayed on the display means. A power supply voltage detection process for detecting a power supply voltage of a display device to be used by mounting on the head or face, a voltage comparison process for comparing the voltage detected by the power supply voltage detection process with a predetermined value, and the power supply voltage detection When the voltage detected by the process is lower than the predetermined value, the drive of at least one of the display units is stopped and the display drive process of driving the remaining display unit is executed. A drive control method for a display device, comprising: 8. A plurality of display means for displaying image or character information and a display control means for controlling the plurality of display means are provided, and in order to appreciate the image or character information displayed on the display means. A power supply voltage detection process for detecting a power supply voltage of a display device to be worn on the head or face, a voltage comparison process for comparing the voltage detected by the power supply voltage detection process with a predetermined value, and the power supply voltage detection When the voltage detected in the processing is lower than the predetermined value, at least one of the display means is stopped and the remaining display means is driven in a power saving mode and all of the display means are driven. A drive control method for a display device, comprising: performing a mode selection process that enables selection of one of a normal mode. 9. A display unit for the left and right eyes, which is arranged corresponding to each of the left and right eyes of a user and displays image or character information, and a display control unit for controlling the display unit for the left and right eyes. And a power supply voltage detection process for detecting a power supply voltage of a display device that is used by being worn on the head or face for viewing the image or character information displayed on the display unit for the left eye and the right eye. A voltage comparison process of comparing the voltage detected by the power supply voltage detection process with a predetermined value, and the voltage detected by the power supply voltage detection process is lower than the predetermined value, the left eye and the right eye Drive control method for driving only one of the display means for driving, and a drive control method for a display device. 10. A display unit for the left and right eyes, which is arranged corresponding to each of the left and right eyes of the user and displays image or character information, and a display control unit for controlling the display unit for the left and right eyes. And a power supply voltage detection process for detecting a power supply voltage of a display device that is used by being worn on the head or face for viewing the image or text information displayed on the left-eye and right-eye display means. A voltage comparison process of comparing a voltage detected by the power supply voltage detection process with a predetermined value, and a voltage detected by the power supply voltage detection process being lower than the predetermined value, the left eye and the right eye A power saving mode for driving either one of the display means for display and a normal mode for driving both of the display means for the left eye and the right eye, and a mode selection process for enabling selection of either one. Characteristic table Drive control method of the apparatus. 11. The display means to be driven is set to be the display means on the dominant eye side of the user when one of the left-eye display means and the right-eye display means is driven. 11. A drive control method for a display device according to claim 9 or 10. 12. The drive control method for a display device according to claim 11, wherein the display unit on the dominant eye side is set by a switch provided in the device.