JP2009192583A - Head-mounted type video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head-mounted type video display device (HMD) which can reduce power consumption without impairing visibility of a picture. <P>SOLUTION: Disclosed is the HMD including a display unit having a color LCD which displays a picture based upon image signals for red (R), green (G), and blue (B), a back light having light sources whose light emission colors are R, G and B respectively and which lights up the LCD, and through which the outside is seen. The HMD includes an electronic camera, an image color analyzing unit which analyzes coloring of an image photographed by the electronic camera, and a control unit which outputs image signals for R, G and B to the LCD and controls an operation of the LCD and operations of the light sources of R, G and B, the control unit being operative to put the image signals for R, G and B together to generate a monochromatic composite image signal and then to perform liquid crystal monochromatic driving wherein the composite image signal is output to one of liquid crystal display elements of R, G and B to drive it and/or light source monochromatic driving wherein one of the light sources of R, G and B is driven according to an analysis result of the image color analyzing unit. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a head-mounted video display apparatus, and more particularly to a head-mounted video display apparatus having a display unit that can see through the outside and includes a liquid crystal color display.

  Conventionally, an image (hereinafter also referred to as an image) that is detachably attached to the observer's head or face and obtained from an image display element such as a small CRT or a liquid crystal display element is displayed on the observer's eyeball by an eyepiece optical system. A head-mounted image display device, that is, an HMD (Head Mount Display) is known in which a virtual image can be observed as if the image is enlarged and projected in the air.

  The HMD is used as a display device for viewing content videos such as DVDs and videos, and for remote operation of industrial equipment or medical equipment, and has a wide variety of uses.

  For remote operation, a so-called see-through type HMD in which various information necessary for the work of an operator is usually displayed superimposed on a natural image (hereinafter also referred to as a see-through image) by external light incident through the display unit of the HMD. Is used.

  For example, an operator wears a see-through type HMD equipped with an electronic camera, works while observing a see-through image of the work object, and an instructor displays an image of the work object photographed with the electronic camera at a remote location. For example, a remote work support system is known in which an operator is provided with appropriate information by voice or video while giving a work instruction while observing on a monitor such as a host computer. (For example, refer to Patent Document 1).

  By the way, the HMD used for such remote operation usually uses a battery as its power source. For this reason, it is desired to reduce power consumption and extend usable time. However, when a transmissive liquid crystal display element that requires a backlight is used as an image display element, it requires a large amount of power to drive not only the liquid crystal display element but also the backlight. There was a problem of having a great influence on time.

Therefore, various liquid crystal display devices have been studied in order to deal with such problems. For example, in the low power mode, red (R), green (G), and blue (B) color image signals that drive the liquid crystal display elements are combined to generate a combined image signal that becomes a monochromatic image signal. Then, only the G liquid crystal drive circuit of the R, G, and B liquid crystal drive circuits is driven by the composite image signal, and power supply to the remaining two drive circuits is interrupted. Thus, a liquid crystal display device capable of reducing power consumption is known (for example, see Patent Document 2).
JP 2002-132487 A JP 2000-10529 A

  The liquid crystal display device described in Patent Document 2 is configured to reduce power consumption by driving only the G liquid crystal drive circuit with the composite image signal and interrupting the power supply of the remaining two drive circuits. However, when such a liquid crystal display device is used in the above-described remote operation HMD, there is a problem that the visibility of a display image displayed on the liquid crystal display device is greatly reduced depending on the color of the see-through image. . For example, when the color of the see-through image is biased to green, the color of the display image displayed on the liquid crystal display device is green of the same color, which makes it difficult to distinguish between the see-through image and the display image. The visibility of the display image displayed on the screen is greatly reduced. Even if only the R liquid crystal drive circuit or the B liquid crystal drive circuit is driven by the composite image signal, the same problem occurs when the color of the see-through image is biased to red or blue.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a head-mounted video display device that can reduce power consumption without impairing video visibility.

  The above object is achieved by the invention described in any one of the following items 1 to 3.

1. A liquid crystal color display having a transmissive liquid crystal display element for displaying R, G, and B video images based on a red (R) image signal, a green (G) image signal, and a blue (B) image signal; ,
A head-mounted image display device having a display unit capable of see-through the outside, comprising a light source having emission colors of R, G, and B, respectively, and a backlight for illuminating the liquid crystal color display;
An electronic camera for photographing the outside world;
An image color analysis unit for analyzing the hue of an image photographed by the electronic camera;
A control unit that outputs image signals for R, G, and B to the liquid crystal color display, and controls operations of the liquid crystal color display and operations of the light sources of R, G, and B;
The controller is
R, G, and B image signals are combined to generate a combined image signal that becomes a single color image signal, and based on the analysis result of the image color analysis unit, the combined image signal is converted into R, G, and B transmission types. Liquid crystal single color drive that outputs and drives to any one of the transmissive liquid crystal display elements and / or light source single color drive that drives any one of the light sources of R, G, and B, or any one of them A head-mounted image display device characterized by having an operation.

2. It has a battery voltage detector that detects the voltage of the battery as a power source for operation of the head-mounted image display device,
The controller is
2. The head-mounted image display device according to 1, wherein the liquid crystal monochrome driving and the light source monochrome driving or any one of the driving operations is performed based on a detection result of the battery voltage detection unit.

3. A liquid crystal color display having a transmissive liquid crystal display element for displaying R, G, and B video images based on a red (R) image signal, a green (G) image signal, and a blue (B) image signal; ,
A head-mounted image display device having a display unit capable of see-through the outside, comprising a light source having emission colors of R, G, and B, respectively, and a backlight for illuminating the liquid crystal color display;
An electronic camera for photographing the outside world;
An image color analysis unit for analyzing the hue of an image photographed by the electronic camera;
A control unit that outputs image signals for R, G, and B to the liquid crystal color display, and controls operations of the liquid crystal color display and operations of the light sources of R, G, and B;
The controller is
R, G, and B image signals are combined to generate a combined image signal that becomes a single color image signal, and based on the analysis result of the image color analysis unit, the combined image signal is converted into R, G, and B transmission types. Liquid crystal monochromatic driving for driving by outputting to any one of the transmissive liquid crystal display elements and light source driving for driving at least one light source of the R, G, B light sources, or any one of the driving operations. A head-mounted image display device comprising:

  According to the present invention, the control unit generates a composite image signal that is a single color image signal by combining the R, G, and B image signals, and based on the analysis result of the image color analysis unit, the composite image signal R, G, and B light sources based on the analysis result of the liquid crystal single color drive and image color analysis unit that outputs and drives the transmissive liquid crystal display element to any one of the R, G, and B transmissive liquid crystal display elements The light source is monochromatic driving for driving any one of the light sources, or any one of the driving operations. Thereby, without always driving the three transmissive liquid crystal display elements R, G, and B and the three backlight light sources R, G, and B, the liquid crystal monochromatic driving and the light source monochromatic driving, or the A single color can be obtained by performing any one of the driving operations. As a result, power consumption can be greatly reduced, battery consumption can be suppressed, and the usable time can be extended.

  In addition, when performing liquid crystal single color driving and light source single color driving, a transmissive liquid crystal display element to be driven based on the analysis result of an image color analysis unit that analyzes the hue of an image captured by an electronic camera that captures the outside world, The backlight source is selected. Thereby, for example, when the color of the see-through image in the outside world is biased to green, a red or blue transmissive liquid crystal display element or a backlight light source can be selected and driven. That is, it is possible to display an image having a color different from the color of the see-through image. As a result, the see-through image and the display image can be easily identified, and the deterioration of the visibility due to the single color can be suppressed.

  Embodiments of a head-mounted image display device (hereinafter also referred to as HMD) according to the present invention will be described below with reference to the drawings. In addition, although this invention is demonstrated based on embodiment of illustration, this invention is not limited to this embodiment.

  First, the appearance of the HMD will be described with reference to FIG. FIG. 1 is a perspective view showing an appearance of an HMD 1 according to an embodiment of the present invention.

  As shown in FIG. 1, the HMD 1 includes temples 21R and 21L, a bridge 22, nose pads 23R and 23L, transparent substrates 24R and 24L, a display unit 25 (LCD display unit 26, eyepiece optical system 27), a camera unit 28, and an earphone. 29R, 29L, a microphone 30, a control unit 31, and the like.

  The HMD 1 having such a configuration is such that the worker wears the HMD 1 on the head, works while observing the see-through image of the work object through the display unit 25, and the work object photographed by the camera unit 28 by the instructor. While observing the above image on a monitor such as a host computer provided at a remote place, the operator is provided with appropriate information by voice or video via a wireless LAN or the like to give a work instruction.

  The temples 21R and 21L are long members made of a flexible elastic material or the like. The temples 21R and 21L are hooked on the ears or the temporal region of the wearer and held on the head of the wearer of the HMD1. This is for adjusting the mounting position. The temples 21R and 21L are configured to be rotatable in the directions of arrows P and Q in the rotating portions 21Ra and 21La. When the HMD 1 is not used, the temples 21R and 21L are rotated in the directions of the arrows P and Q. It can be made compact by moving it along the transparent substrates 24R and 24L.

  The bridge 22 includes nose pads 23R and 23L that hold the HMD 1 on the face of the wearer, and is a short rod-like member that is stretched between predetermined positions of the transparent substrates 24R and 24L facing each other. The transparent substrate 24L is held in a relative positional relationship with a fixed gap.

  The transparent substrates 24R and 24L are substantially flat transparent bodies that form a U-shaped space 24Rs at a position corresponding to one eyeball. An eyepiece optical system 27 is fitted in a U-shaped space 24Rs formed by being surrounded by the transparent substrate 24R.

  The display unit 25 includes an LCD display unit 26, an eyepiece optical system 27, and the like. The display unit 25 is provided in a remote place via an image captured by the camera unit 28 or a communication unit 36 described later provided in the control unit 31. For example, an image provided from a host computer (not shown) is displayed. Further, the display unit 25 is configured to be able to see through the outside world (front subject) through the eyepiece optical system 27. Details of the display unit 25 will be described later.

  The camera unit 28 corresponds to an electronic camera according to the present invention, and includes a zoom lens 281 (not shown), a CCD (Charge Coupled Device) 282, an image processing unit 283, and the like. The camera unit 28 shoots the outside world (front subject) around the wearer, and the subject optical image formed by the zoom lens 281 is photoelectrically converted by the CCD 282 to form an image signal (hereinafter also referred to as a video signal). The image processing unit 283 or the like performs predetermined image processing on the image signal.

  Earphones 29R and 29L are inserted into the ears of the wearer and provide sound to the wearer.

  The microphone 30 converts the voice of the wearer into an audio signal.

  The control unit 31 includes a microcomputer and includes a power switch 351, an operation switch 352, and the like. The control unit 31 receives signals from these various operation switches and a control signal from a host computer (not shown) provided in a remote place. The display operation and the image signal processing operation performed by the HMD 1 are comprehensively controlled.

  Here, the configuration of the display unit 25 will be described with reference to FIG. FIG. 2 is a side sectional view from the left side surface of the display unit 25, and mainly shows the internal configuration of the display unit 25.

  As shown in FIG. 2, the display unit 25 includes a housing 261, a backlight 262, a collimator lens 263, an LCD display unit 26 including an LCD (Liquid Crystal Display) 264, a prism 271, and an HOE (Holographic Optical Element) 272. The eyepiece optical system 27 and the like.

  In the state where the backlight 262, the collimator lens 263, and the LCD 264 are built in the housing 261 of the LCD display unit 26, the housing 261 is inclined upward and forward (at the upper end of the prism 271 of the eyepiece optical system 27). In FIG. 2, it is attached in such a manner as to protrude obliquely upward to the right.

  The backlight 262 has RLED 262R, GLED 262G, and BLED 262B, which are light emitting diodes of red (R), green (G), and blue (B), respectively, and is a light source that illuminates the LCD 264.

  The collimator lens 263 projects the light from the RLED 262R, GLED 262G, and BLED 262B of the backlight 262 onto the LCD 264 in a substantially parallel light.

  The LCD 264 displays an image taken by the camera unit 28, an image provided from a host computer (not shown) provided at a remote location, for example, via a communication unit 36 described later provided in the control unit 31. The LCD 264 has a transmissive liquid crystal display element that displays R, G, and B video images based on a red (R) image signal, a green (G) image signal, and a blue (B) image signal. It is a liquid crystal color display.

  The prism 271 is a substantially plate-shaped transparent member made of glass, transparent resin, or the like, and causes light from the LCD 264 to be reflected a plurality of times inside. The upper end portion of the prism 271 is formed in a wedge shape so that the front side (opposite side of the eyepiece surface) protrudes to be thicker upward so that most of the light from the LCD 264 can be collected inside. The thick part 271b thus formed is formed.

  An inclined surface 271a is formed at the lower end of the prism 271. The prism 271 is bonded (for example, bonded) to the inclined surface 24Ra formed on the transparent substrate 24R via the HOE 272. The front and back surfaces of the prism 271 are flush with the front and back surfaces of the transparent substrate 24R. Thereby, the prism 271 is integrated with the transparent substrate 24R in a single plate shape.

  The HOE 272 is a volume phase type holographic optical element having a positive power, which is constituted by a so-called free-form surface that is optically asymmetric with respect to the axis, and is supported at a lower end portion of the prism 271 with a predetermined inclination angle. The HOE 272 provides a hologram image to the eyeball E using the light interference phenomenon when irradiated with the light guided by the prism 271.

  In the display unit 25 having the above-described configuration, the light emitted from the RLED 262R, GLED 262G, and BLED 262B of the backlight 262 illuminates the LCD 264 through the collimator lens 263, and the image light generated by the LCD 264 by this illumination is a prism. After a plurality of total reflections in 271, it is diffracted by the HOE 272 and guided to the wearer's eyeball E as a virtual image.

  Further, the prism 271 guides light incident from the front to the eyeball E of the wearer. As a result, the wearer can see through the outside world (front subject) and is provided in a remote place via an image captured and generated by the camera unit 28 or a communication unit 36 described later provided in the control unit 31. For example, an image provided from, for example, a host computer (not shown) is superimposed on the outside (a subject in front) and viewed.

  Next, a schematic configuration of the HMD 1 will be described with reference to FIG. FIG. 3 is a block diagram illustrating a schematic configuration of the HMD 1. In FIG. 3, the same members as those shown in FIGS. 1 and 2 are assigned the same numbers.

  The main part of the HMD 1 includes a display unit 25, a camera unit 28, a control unit 31, and the like.

  The display unit 25 includes an LCD display unit 26 and an eyepiece optical system 27. Since the operations performed in each part have been described above, the description thereof will be omitted.

  The camera unit 28 includes a zoom lens 281, a CCD (Charge Coupled Device) 282, an image processing unit 283, and the like.

  The CCD 282 is a color area imaging sensor in which red (R), green (G), and blue (B) color transmission filters are arranged in a checkered pattern in pixel units (pixel units), and is imaged by the zoom lens 281. The subject light image is photoelectrically converted into image signals of R, G, and B color components (signals composed of a signal sequence of pixel signals received in units of pixels).

  The image processing unit 283 includes, for example, a black level correction unit, a pixel interpolation unit, a white balance control unit, a gamma correction unit, a matrix calculation unit, a shading correction unit, and an image compression unit (not shown), and is read from the CCD 282. The image signal is subjected to known image signal processing. Then, the image signal that has undergone predetermined processing at these parts is stored in an image memory 33 of the control unit 31 described later.

  The control unit 31 includes a control unit 32, an image memory 33, a VRAM (Video Random Access Memory) 34, an operation unit 35, a communication unit 36, an LCD driver 37, a battery 38 that is a power source for operating the HMD 1, and the like.

  The control unit 32 reads a ROM (Read Only Memory) that stores each control program (not shown), a RAM (Random Access Memory) that temporarily stores data such as arithmetic processing and control processing, and a control program from the ROM. CPU (central processing unit) etc. to be executed. The control unit 32 receives a signal from the operation unit 35 having the power switch 351 and the operation switch 352 and a control signal from a host computer (not shown) provided at a remote place, and performs display operations and images performed in the HMD 1. The signal processing operation is comprehensively controlled. Details of the display operation control by the control unit 32 will be described later.

  The image memory 33 is a temporary memory used as a work area for performing various processing on the image signal by the control unit 32.

  The VRAM 34 has a recording capacity of an image signal corresponding to the number of pixels of the LCD 264 in the LCD display unit 26, and is a buffer memory for an image signal that constitutes a video that is reproduced and displayed on the LCD 264.

  The communication unit 36 includes, for example, a wireless LAN wireless communication device, and transmits / receives video, audio, control signals, and the like to / from a host computer (not shown) provided at a remote location via a communication network. In addition, Bluetooth, wireless USB, or a low power consumption type device may be used as the wireless communication means.

  The LCD driver 37 is a drive circuit for the LCD 264, and includes an RLCD driver 37R, a GLCD driver 37G, and a BLCD driver 37B corresponding to the R, G, and B transmissive liquid crystal display elements constituting the LCD 264. The RLCD driver 37R, the GLCD driver 37G, and the BLCD driver 37B are respectively a red (R) image signal, a green (G) image signal, and a blue (B) image output from the display control unit 321 described later via the VRAM 34. R, G, and B transmissive liquid crystal display elements are driven based on the signals.

  Here, details of the control unit 32 will be described. The control unit 32 includes a display control unit 321, an image color analysis unit 322, a battery voltage detection unit 323, and the like.

  The battery voltage detection unit 323 detects the voltage and remaining capacity of the battery 38.

  The image color analysis unit 322 analyzes the color of an image, that is, a subject in front of the wearer, based on an image signal captured by the camera unit. As a method of analyzing the hue, for example, an intensity distribution (histogram) of R, G, and B signals is taken from the image signal, and a color component having a high frequency is calculated, or the ratio of the R, G, and B signals is biased. A well-known method such as calculating can be used.

  The display control unit 321 corresponds to each of the R, G, and B transmissive liquid crystal display elements constituting the LCD 264, and the red (R) image signal, the green (G) image signal, and the blue (B) image signal. Is output via the RLCD driver 37R, the GLCD driver 37G, and the BLCD driver 37B to control driving. Further, the driving of the RLED 262R, the GLED 262G, and the BLED 262B, which are the light sources of the backlight 262 of the LCD 264, is controlled.

  Further, the display control unit 321 has two drive modes of liquid crystal single color drive and light source single color drive as drive modes of the LCD 264 and the backlight 262.

  In the liquid crystal single color drive, R, G, and B image signals are combined to generate a composite image signal that becomes a single color image signal. Based on the analysis result of the image color analysis unit 322, the composite image signal is converted to R, G, In this mode, the light is output and driven to any one of the transmissive liquid crystal display elements of B.

  The light source monochromatic driving is a mode in which any one light source of the RLED 262R, the GLED 262G, and the BLED 262B is driven based on the analysis result of the image color analysis unit 322.

  Then, the display control unit 321 can execute liquid crystal monochromatic driving and light source monochromatic driving, or any one of the driving modes based on the detection result of the battery voltage detection unit 323.

  Here, the flow of the display control operation performed in the HMD 1 will be described with reference to FIGS. 4A is a schematic diagram illustrating an example of a screen before display control, and FIG. 4B is a schematic diagram illustrating an example of a screen after display control. FIG. 5 is a flowchart showing the flow of the display control operation.

  As shown in FIG. 4A, the screen of the display unit 25 is provided from a host computer provided at a remote place, superimposed on a see-through image S including a work object X that can be observed through the eyepiece optical system 27. For example, a display image H1 such as a work manual is displayed in color.

  In such a state, first, the battery voltage detection unit 323 detects the voltage of the battery 38 (step S1). Next, the display control unit 321 compares the voltage Vb of the battery 38 detected by the battery voltage detection unit 323 with a preset reference voltage Vr. As a result of the comparison, if Vb <Vr (step S2; Yes), that is, if the remaining capacity of the battery 38 is reduced, the display control unit 321 first combines the R, G, and B image signals to obtain a single color. A composite image signal to be an image signal is generated (step S3). Next, the work unit X is photographed by the camera unit 28 at an angle of view substantially equal to the angle of view of the see-through image, and an image signal is captured (step S4). The image color analysis unit 322 analyzes the image signal captured by the camera unit 28 and analyzes the color of the subject (step S5). Next, the display control unit 321 selects, based on the color of the subject analyzed by the image color analysis unit 322, whether to output the composite image signal to R, G, or B transmissive liquid crystal display elements ( Step S5). Similarly, the display control unit 321 selects one of the light sources RLED 262R, GLED262G, and BLED262B to be driven based on the color of the subject analyzed by the image color analysis unit 322 (step S6).

  For example, when the color of the see-through image S is biased to green, a red or blue transmissive liquid crystal display element and a backlight light source are selected. That is, an over-type liquid crystal display element and a backlight source having a hue different from the hue of the see-through image S are selected.

  Then, the display control unit 321 outputs and drives the composite image signal to the selected over-type liquid crystal display element and drives the selected backlight light source (step S8). At this time, as shown in FIG. 4B, the screen of the display unit 25 is displayed by changing the color display video H1 to the monochrome display video H2.

  As described above, in the HMD 1 according to the embodiment of the present invention, the display control unit 321 generates a composite image signal that becomes a single color image signal by combining the R, G, and B image signals, and the image color analysis unit 322. Based on the result of the analysis, the composite image signal is output to any one of the R, G, and B transmissive liquid crystal display elements, and the liquid crystal single color drive and the image color analyzing unit 322 analyze it. Based on the result, the light source is monochromatic driving for driving any one of the R, G, and B backlight sources, or any one of the driving operations. Thereby, without always driving the three transmissive liquid crystal display elements R, G, and B and the three backlight light sources R, G, and B, the liquid crystal monochromatic driving and the light source monochromatic driving, or the A single color can be obtained by performing any one of the driving operations. As a result, power consumption can be greatly reduced, battery consumption can be suppressed, and the usable time can be extended.

  In addition, when performing liquid crystal single color driving and light source single color driving, a transmissive liquid crystal display element to be driven and a backlight light source are driven based on the analysis result of the image color analysis unit 322 that analyzes the hue of an image captured by an electronic camera. To choose. Thereby, for example, when the color of the see-through image in the outside world is biased to green, a red or blue transmissive liquid crystal display element or a backlight light source can be selected and driven. That is, it is possible to display an image having a color different from the color of the see-through image. As a result, the see-through image and the display image can be easily identified, and the deterioration of the visibility due to the single color can be suppressed.

  The present invention has been described above with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and can be changed or improved as appropriate. For example, in the above-described embodiment, when the voltage of the battery 38 decreases, both the liquid crystal single color drive and the light source single color drive mode are executed, but only one of the drive modes is executed. It may be. In particular, since the power consumed by the backlight light source is large, a large effect can be obtained even when only the light source monochromatic driving mode is used.

  In addition, regarding the driving of the backlight light source, the light source monochromatic driving for driving any one of the RLED 262R, GLED 262G, and BLED 262B is performed, but two LEDs may be selected and driven. In this case, although the effect of reducing the power consumption is small compared to the light source monochromatic driving, the expression color of the backlight can be increased and the color desired by the user can be brought close to.

  In the above-described embodiment, the liquid crystal single-color drive and the light source single-color drive are executed based on the voltage (remaining capacity) of the battery 38. However, for example, it is executed by an instruction from an operator operation switch or the like. You may do it.

It is a perspective view showing appearance of HMD concerning one embodiment of the present invention. It is side sectional drawing of the display unit of HMD. It is a block diagram which shows schematic structure of HMD. It is a schematic diagram which shows the example of a display. It is a flowchart which shows the flow of display control operation | movement.

Explanation of symbols

1 Head-mounted video display (HMD)
21R, 21L Temple 22 Bridge 23R, 23L Nose pad 24R, 24L Transparent substrate 25 Display unit 26 LCD display unit 261 Housing 262 Backlight 262R RLED
262G GLED
262B BLED
263 Collimator lens 264 LCD
27 Eyepiece optical system 271 Prism 272 HOE
28 Camera Unit 281 Zoom Lens 282 CCD
283 Image processing unit 29R, 29L Earphone 30 Microphone 31 Control unit 32 Control unit 321 Display control unit 322 Image color analysis unit 323 Battery voltage detection unit 33 Image memory 34 VRAM
35 Operation Unit 351 Power Switch 352 Operation Switch 36 Communication Unit 37 LCD Driver 37R RLCD Driver 37G GLCD Driver 37B BLCD Driver 38 Battery E Eye

Claims (3)

A liquid crystal color display having a transmissive liquid crystal display element for displaying R, G, and B video images based on a red (R) image signal, a green (G) image signal, and a blue (B) image signal; ,
A head-mounted image display device having a display unit capable of see-through the outside, comprising a light source having emission colors of R, G, and B, respectively, and a backlight for illuminating the liquid crystal color display;
An electronic camera for photographing the outside world;
An image color analysis unit for analyzing the hue of an image photographed by the electronic camera;
A control unit that outputs image signals for R, G, and B to the liquid crystal color display, and controls operations of the liquid crystal color display and operations of the light sources of R, G, and B;
The controller is
R, G, and B image signals are combined to generate a combined image signal that becomes a single color image signal, and based on the analysis result of the image color analysis unit, the combined image signal is converted into R, G, and B transmission types. Liquid crystal single color drive that outputs and drives to any one of the transmissive liquid crystal display elements and / or light source single color drive that drives any one of the light sources of R, G, and B, or any one of them A head-mounted image display device characterized by having an operation. It has a battery voltage detector that detects the voltage of the battery as a power source for operation of the head-mounted image display device,
The controller is
The head-mounted image display device according to claim 1, wherein the liquid crystal monochromatic driving and the light source monochromatic driving or any one of the driving operations is performed based on a detection result of the battery voltage detection unit. A liquid crystal color display having a transmissive liquid crystal display element for displaying R, G, and B video images based on a red (R) image signal, a green (G) image signal, and a blue (B) image signal; ,
A head-mounted image display device having a display unit capable of see-through the outside, comprising a light source having emission colors of R, G, and B, respectively, and a backlight for illuminating the liquid crystal color display;
An electronic camera for photographing the outside world;
An image color analysis unit for analyzing the hue of an image photographed by the electronic camera;
A control unit that outputs image signals for R, G, and B to the liquid crystal color display, and controls operations of the liquid crystal color display and operations of the light sources of R, G, and B;
The controller is
R, G, and B image signals are combined to generate a combined image signal that becomes a single color image signal, and based on the analysis result of the image color analysis unit, the combined image signal is converted into R, G, and B transmission types. Liquid crystal monochromatic driving for driving by outputting to any one of the transmissive liquid crystal display elements and light source driving for driving at least one light source of the R, G, B light sources, or any one of the driving operations. A head-mounted image display device comprising:

Images