JPH07255021A - Eye-front video display device and video display method - Google Patents

Abstract

PURPOSE:To provide an eye-front video display device which is small in size and lightweight and can obtain a high-definition image by increasing the apparent number of pixels by moving a light transmission display element in parallel to its display surface in synchronism with the scanning timing of a video signal. CONSTITUTION:A vibration element moves an LCD reciprocally by an amplitude which is a half the dot pitch (a) of the LCD in parallel to the display surface. In this one field, an image of the video signal corresponding to each dot coordinate of the LCD at a position A is displayed at time TA and an image of the video signal corresponding to each dot coordinate of the LCD at a position B is displayed at time TB. Consequently, the composite screen of the LCD at the positions A and B is obtained on the whole and the number of pixels on the composite screen apparently increases by twice. Consequently, optical components of the device decrease in number, and high definition, and small- sized lightweight constitution are obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-eye image display device for visualizing an image in front of the eye and an image display method for displaying a video signal in high definition.

[0002]

2. Description of the Related Art FIG. 11 shows, for example, Japanese Patent Application No. 4-288431.
FIG. 2 is a schematic configuration diagram showing an optical system on the side of one eye of the front-of-eye image display device shown in No. “Wide-field high-definition display device”, in which 1 is a display element right including an LCD and 2
Is also a display element left, 3 is a half mirror that transmits the display image from the display element right 1, and reflects the display image from the display element left 2. Reference numeral 4 is a display image and display from the display element right 1 through the half mirror 3. The eyepiece lens optically processes the display image from the element left 2 such as magnification. A back light (not shown) is provided on the back side of each display element, and the light from the backlight is transmitted to each display element based on a signal from a display element selector (not shown). Is modulated to.

Reference numeral 5 is a virtual image right on which the display image on the display element right 1 is transmitted through the half mirror 3 to form an image. Reference numeral 6 is a virtual image left on which the display image on the display element 2 is reflected by the half mirror 3 to form an image. In the combined screen formed by optically combining the virtual image right 5 and the virtual image left 6, the virtual image right 5 and the virtual image left 6 are displaced from each other by a half of the dot pitch, and the virtual image right 5 and the virtual image left 6 are combined.
Of dots are arranged alternately. Reference numeral 8 is an eye of an observer who observes the composite screen 7. In addition, this type of front-eye wear type front-eye image display device is shown in FIG.
As shown in the perspective view of FIG. 1, the optical system is provided on each of the right eye side and the left eye side.

FIG. 13 is a schematic block diagram showing a circuit system of the above-mentioned front image display device. In FIG. 13, reference numeral 9 is a video signal input from a video signal source, and the input video signal is set to a predetermined dot pitch. A video signal processing circuit for processing and outputting a plurality of thinned-out video signals, 41 is a display element selector for distributing the signals processed and output by the video signal processing circuit 9 to the display element right 1 or the display element left 2, 42 Is a central control unit that controls the entire apparatus.

Next, the operation will be described. The video signal processing circuit 9 outputs the input video signal to each of the display elements so that the dots of the composite screen are formed by alternately arranging the dots of the display element right 1 and the display element left 2 Separation processing is performed according to the dot coordinates of. The display element selector 41 appropriately distributes the output signal from the video signal processing circuit 9 which has been subjected to the separation processing, to the display element right 1 or the display element left 2 and outputs it.

The display image displayed on the display element right 1 passes through the half mirror 3 and is appropriately formed as a virtual image right 5 by the eyepiece 4, while the display image displayed on the display element left 2 is a half mirror. It is reflected by 3 and is appropriately imaged as a virtual image left 6 by the eyepiece 4. At this time, the virtual image right 5 and the virtual image left 6 are formed by being shifted by half the dot pitch in the horizontal direction, so that the number of pixels of the combined screen is twice the number of pixels of each display element. In this way, it is possible to obtain a higher definition image than the limit of the number of pixels or dot pitch of each LCD, and if the number of pixels is the same, it is possible to reduce the number of pixels of each LCD to reduce the cost of the LCD. Can be used.

Separately from this, the video signal input by the video signal processing circuit 9 is time-compressed so that the scanning time is halved, and the compressed video signal is converted within the scanning time of the original video signal. Output twice in succession. The display element selector 41 selects these two output signals so that the display element right 1 displays the first time, and the display element left 2 displays the second time, and the output signals are output to the respective display elements. Distribute appropriately to.

By the same optical processing operation as described above, the virtual image right 5 from the display element right 1 and the virtual image left 6 from the display element left 2 are horizontally shifted by half the dot pitch. Further, if the display timings of both are configured such that the dots corresponding to the same coordinates of the video signal from the video signal source have substantially the same timing, the composite screen 7 looks as if there is one display element. This means that the number of pixels has doubled, and high-definition images can be obtained.

[0009]

Since the conventional in-eye image display device is configured as described above, the optical system of one eye portion requires two display elements, the display element right and the display element left. Moreover, although not shown in the drawing, a backlight is required for each of the back sides, and therefore the entire front-eye image display device requires four display elements and a backlight for the right eye portion and the left eye portion. As a result, the number of optical components increases,
There is a problem that the entire device becomes large and heavy.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a small and lightweight front image display device capable of increasing the apparent number of pixels.
Another object of the present invention is to obtain an in-eye image display device in which a backlight can be shared by a plurality of display elements. further,
It is an object of the present invention to provide a video display method capable of providing a high-definition video with a compact optical system.

[0011]

An in-eye image display device according to the present invention includes a transmissive display element having a backlight for a light source, a lens system for optically processing image light from the display element, and a video signal. Video signal processing circuit for separating the video signal into a plurality of signals and time-compressing and outputting the video signal, a display element driving circuit for processing the output signal from the video signal processing circuit into a signal that can be driven by the display element, and a video signal scanning And a driving unit that reciprocates the transmissive display element in a direction parallel to the display surface in synchronization with the timing.

Further, the video signal is separated into n equal parts of the dot pitch of the transmissive display element and extracted for each dot pitch, and these extracted signals are time-compressed into signals of n times the original video signal and successively. A video signal processing circuit for outputting, a transmissive display element that scans light from the backlight n times within the scanning time of the original video signal based on a signal from the display element driving circuit, and modulates the image light into a transmissive display element; Drive means for moving the transmissive display element in the direction parallel to the display surface by 1 / n of the dot pitch at each scanning timing of the pattern display element and reciprocating the scanning time of the original video signal as one cycle. It is a thing.

Further, a video signal processing circuit for extracting a video signal corresponding to the dot pitch of the transmissive display element, time-compressing the extracted signal into a m-times speed signal of the original video signal, and outputting m times. A transmissive display element that modulates light from a backlight into image light by scanning m times within a scanning time of an original video signal based on a signal from a display element drive circuit;
Drive means for moving the transmissive display element in a direction parallel to the display surface by 1 / m of the dot pitch at each scanning timing of the transmissive display element, and reciprocating with the scanning time of the original video signal as one cycle. It is equipped with.

A double-sided emission type backlight,
At least two transmissive display elements, which are arranged to face the light emitting surfaces of the backlight, respectively, and an optical member for optically processing the image light from each transmissive display element are provided. Further, the backlight and the transmissive display element are integrated. Also, an endless belt arranged around the backlight, a driving means capable of reciprocating the belt to reciprocate, and a transmissive display element attached to the belt so as to face the light emitting surface of the backlight. It is equipped with.

Further, there is provided an expanding / contracting member which is connected to the two transmissive display elements and reciprocates the respective display elements in a direction parallel to the display surface thereof by the driving force from the driving means. Further, a rotating portion having a rotating shaft in a direction perpendicular to the display surface of the transmissive display element and rotating by a driving force from a driving means, and connecting the rotating portion and the two transmissive display elements to each other. And a connecting member for transmitting the rotational force from the moving part as a reciprocating motion. Further, a rack provided on the two transmissive display elements so as to face each other,
It is provided with a pinion that meshes with both of these racks, and a drive means that rotationally drives this pinion.

The video display method according to the present invention is
The video signal is separated into multiple signals, each signal is time-compressed to shorten the scanning time, and the shortened signal is output to the display unit within the original scanning time of the video signal and the dots are output within the dot pitch of the display unit. The image is synthesized by periodically moving the position and synchronizing the movement cycle with the scanning timing of the display section.

Further, the video signal is time-compressed to shorten the scanning time, and the signal shortened within the original scanning time of the video signal is output to the display unit a plurality of times to determine the dot position within the dot pitch of the display unit. The image is synthesized by periodically moving and synchronizing the moving cycle and the scanning timing of the display unit.

Further, the video signal is separated into n equal parts of the dot pitch of the display part and is extracted for each dot pitch,
These extracted signals are time-compressed into a signal that is n times as fast as the original video signal to shorten the scanning time, and these shortened signals are output to the display unit so as to scan within the original scanning time of the video signal. The scanning time of the video signal is set as one cycle, and 1 / n of the dot pitch of the display unit is set for each scanning timing of the display unit.
Only, the positions of the dots are moved in a predetermined direction parallel to the display surface to synthesize the image.

Further, the video signal is extracted in correspondence with the dot pitch of the display section, the extracted signal is time-compressed to a m-times speed signal of the original video signal and shortened, and this shortened signal is converted into the video signal. The output is repeatedly output to the display unit so as to scan m times within the original scanning time, and the dot position is 1 / m of the dot pitch of the display unit for each scanning timing of the display unit with the scanning time of the original video signal as one cycle. Is moved in a predetermined direction parallel to the display surface to synthesize an image.

[0020]

In the front-of-eye image display apparatus according to the present invention, the video signal is separated into a plurality of signals by the video signal processing circuit and time-compressed for each of these signals, and then the video signal is output to the transmissive display element by the display element drive circuit. At this time, the transmissive display element is reciprocally moved in a predetermined direction in synchronism with the scanning timing of the transmissive display element by the driving means, images at each scanning timing are shifted by a predetermined pitch and displayed, and the screens are combined.

Also, the video signal processing circuit separates the video signal into n equal parts of the dot pitch of the transmissive display element and extracts each dot pitch, and the extracted signal is time-compressed to n times the original video signal speed. And then output to the transmissive display element by the display element drive circuit. At that time, the transmissive display element is driven in a predetermined direction by 1 / n of the dot pitch at every scanning timing to the transmissive display element by the driving means.
While moving the display screen, the scanning time of the original video signal is set as one cycle, and the display screen is composed by reciprocating with an amplitude of (n-1) / n of the dot pitch.

The video signal processing circuit extracts the video signal corresponding to the dot pitch of the transmissive display element,
The extracted signal is time-compressed to m times the original video signal, repeatedly output m times, and then output to the transmissive display element by the display element drive circuit. At that time, while the transmissive display element is moved in the predetermined direction by 1 / m of the dot pitch at each scanning timing of the transmissive display element by the driving means, the scanning time of the original video signal is set as one cycle and the dot pitch (m
The display screen is composed by reciprocating with an amplitude of -1) / m.

Further, a light source is allocated and supplied to a transmissive display element provided on each light emitting surface by a backlight that emits light from both sides. Further, the driving unit causes the backlight and the transmissive display element to vibrate together. Also,
The transmissive display element reciprocates in a predetermined direction by driving the belt from the driving means, and the display screen is synthesized. Further, the expansion / contraction member expands / contracts due to the driving force from the driving means, and the expansion / contraction motion causes the transmissive display element to reciprocate in a predetermined direction to synthesize the display screen.

Further, the rotating portion is rotated by the driving force from the driving means, and the rotating force of the rotating portion is reciprocated in a predetermined direction by the connecting member connected to the rotating portion and the transmissive display element. Is transmitted to the transmission type display element, and the transmissive display element reciprocates in a predetermined direction to synthesize the display screen. Further, the driving force from the driving means causes the pinion to perform a rotational movement to be reversed at a predetermined cycle, the transmissive display element integrally formed with the rack reciprocates in a predetermined direction, and a display screen is synthesized.

The video display method according to the present invention is
The video signal is separated into multiple signals, the scanning time of each separated signal is compressed, and each signal is sequentially output to the display unit within the original scanning time, and the dot position within the dot pitch of the display unit is determined. The movement is performed periodically, and the movement period and each scanning timing of the display unit are synchronized to synthesize the image light displayed on the display unit based on each signal.

Further, the scanning time of the video signal is compressed, the same compressed signal is output to the display unit a plurality of times within the original scanning time, and the dot positions are periodically moved within the dot pitch of the display unit. The movement cycle and each scanning timing of the display section are synchronized with each other, and the image lights displayed on the display section are combined based on each signal.

Further, the video signal is separated into n equal parts of the dot pitch of the display section, each of the separated signals is extracted for each dot pitch, and the scanning time is set to a signal n times faster than the original video signal. Each signal is compressed and output to the display unit within the original scanning time, and the dot position is set to 1 within the dot pitch of the display unit with the scanning time of the original video signal as one cycle.
/ N is periodically moved, and the moving cycle and each scanning timing of the display unit are synchronized to synthesize the image light displayed on the display unit based on each signal.

Further, the video signal is extracted in correspondence with the dot pitch of the display section, the scanning time of the extracted signal is time-compressed to m times the speed of the original video signal or more, and the same compression is performed within the original scanning time. The signal is output to the display unit m times, and the dot position is periodically moved by 1 / m within the dot pitch of the display unit with the scanning time of the original video signal as one period. The image lights displayed on the display section are combined based on the respective signals in synchronization with the scanning timing.

[0029]

【Example】

Example 1. An embodiment of the present invention will be described below, for example, when the apparent number of pixels is doubled. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is a state diagram showing a vibration state of an LCD, and FIG. 3 is a state diagram showing a screen synthesized by the vibration of the LCD. In FIG. 1, 11 is a display device main body, which is in the shape of eyeglasses, and an image is displayed on a portion corresponding to the lens thereof. Reference numeral 9 denotes a video signal processing circuit for processing a video signal into a plurality of video signals decimated corresponding to a predetermined dot pitch, time-compressing the same, and outputting the video signal. For example, the video signal is time-compressed into an original double speed signal. .

Reference numeral 10 denotes an LCD drive circuit which is provided on each of the right eye side and the left eye side and appropriately processes an output signal from the video signal processing circuit 9 into an LCD drivable signal, and 12 an optical axis R on each of the right eye side and the left eye side. , L are arranged on the optical axis, and 13 is arranged closer to the viewer's eyes than the backlight 12 on the optical axis, and the light from the backlight 12 is displayed on the LCD.
It is a transmissive display element that modulates into image light based on a signal from a drive circuit, and is composed of, for example, an LCD.

Numeral 14 is arranged on the optical axis closer to the observer's eyes than the LCD 13, and magnifies the image light from the LCD 13.
The correcting lens systems 4 are eyepieces arranged on the optical axis closer to the observer's eye than the lens system 14, and are eyepieces for forming the image light passing through the lens system 13 on the retina of the observer. Light 12, LCD 13, lens system 1
The display optical system is constituted by 4 and the eyepiece lens 15. Reference numeral 16 denotes a drive unit that is connected to the LCD 13 and reciprocates the LCD 13 in a predetermined cycle. A guide (not shown) is provided so that the LCD 13 moves in a predetermined direction substantially horizontal to the display surface of the LCD 13.

In FIG. 2, A is the time T _A of the LCD 13.
And the screen position at time T _C , and B indicates the screen position at time T _B of the LCD 13. Time T _A , T _B ,
T _C is 1/120 sec, respectively, and one field is formed at times T _A and T _B , that is, 1/60 sec. In FIG. 2, A and B are illustrated by exemplifying only the R dot among the RGB dots that are normally formed in the delta arrangement. In FIG. 3, 17 is the screen of the LCD 13 at time T _A and the LCD 13 at time T _B.
2 is a 1-field composite screen in which the screen of FIG. 2 and 3, the solid circles indicate the dot positions in A, and the shaded circles indicate the dot positions in B.

Next, the operation will be described. Regarding the operation of the signal system, the video signal processing circuit 9 shown in FIG.
In order to correspond to the dots of the composite screen formed by the dots arranged at the time T _A and the time T _B alternately, the input video signal is input to the time T
Separation processing is performed according to the dot coordinates of the LCD at the respective timings of _A and time T _B. Then, the signal subjected to the separation processing has the scanning timing set to 1 of the time T _A and the time T _B.
It is output as appropriate for each field. At that time, the scanning timings of the video signals for both the right eye and the left eye are also synchronized.

In response to the output signal from the video signal processing circuit 9, the LCD driving circuit 10 processes the double speed video signal into a LCD drivable signal and outputs it to the LCD 13 for control. The LCD 13 is scanned at twice the scanning speed of the original video signal, that is, at half the original scanning time. As a result, at time T _A , an image of the separated video signal corresponding to each dot coordinate of the LCD 13 at the position _A in FIG. 2 is displayed, and at time T _B , the LCD at the position _B is displayed.
The image of the separated video signal corresponding to each dot coordinate of 13 will be displayed. Further, since one field of time T _A and time T _B is scanned twice with a scanning time of 1/2 of the original video signal, the time of one field is equal to the scanning time of the original video signal.

Next, the operation of the display optical system 15 on the right eye side will be described. The vibrating element 16 has a half amplitude (1/2) a of the dot pitch a (see FIG. 2) of the LCD 13 in a direction horizontal to the display surface of the LCD 13 by a guide or the like (not shown).
Move it back and forth to vibrate. That is, the LCD 13 displays the time T
_It is at position A at A and at position B at time T _B. Then, with the time T _A and the time T _B as one field, at the time T _C, it oscillates due to the reciprocating motion in the horizontal direction so that it is present at the position A again. Within this one field, the LCD at position A at time T _A
The image of the video signal corresponding to each dot coordinate of 13 is displayed, and the image of the video signal corresponding to each dot coordinate of LCD 13 at the position B at time T _B is displayed.

As a result, a composite screen of the LCDs at the positions A and B is obtained as a whole, and the number of pixels of the composite screen apparently increases to twice the number of pixels of the LCD 13. In this case, while the image is being displayed on the LCD 13 at the position A, the image is not displayed at the position B, and the LC is similarly displayed at the position B.
Since the image is not displayed at the position A while the image is displayed on D13, the number of pixels displayed on the composite screen is not different from the number of pixels on the LCD 13 to be precise. However, since the scanning speed of the LCD 13 at each position is twice as high as the scanning speed of the original video signal, the position A and the position B are not scanned within the original scanning time.
Since the LCD is scanned at, the both appear to the observer to be displayed at the same time.

According to this embodiment, it is possible to obtain an image having the number of pixels which is apparently larger than the number of pixels of the LCD, and it is possible to obtain a high-definition image exceeding the limit of the dot pitch. Further, if the number of pixels is the same, an LCD having a larger dot pitch can be adopted, so that an inexpensive LCD itself can be adopted. In addition, since it is possible to combine screens without providing a plurality of LCDs, backlights, etc. as in the conventional configuration,
The entire device can be made smaller and lighter, and the number of parts is reduced, so it is cheaper.

Example 2. Next, a case where the apparent number of pixels is tripled will be described. FIG. 4 is a state diagram showing a vibration state of the LCD, and FIG. 5 is a state diagram showing a screen synthesized by the vibration of the LCD. The configuration of the device is almost the same as that of the first embodiment and FIG. 1, and the same portions are denoted by the same reference numerals and the description thereof will be omitted. However, when the number of pixels is tripled,
The video signal processing circuit 9 time-compresses the video signal into the original triple speed signal, for example. In FIG. 4, A is the LCD 1
3 is the screen position at time T _A and time T _D , B is LC
The screen position of D13 at time T _B , and C the screen position of LCD 13 at time T _C. Time T _A , T
_B , T _C , and T _D are 1/180 sec, respectively, and one field is formed at times T _A , T _B, and T _C , that is, 1/60 sec.

In FIG. 4, A, B, and C are shown by exemplifying only the R dot among the RGB dots that are usually formed in the delta arrangement. In FIG. 5, reference numeral 30 denotes a 1-field composite screen in which the screen of the LCD 13 at the time T _A , the screen of the LCD 13 at the time T _B, and the screen of the LCD 13 at the time T _c are composited. Figure 4,
The solid circle in 5 indicates the position of the dot in A,
Circles with diagonal lines indicate the positions of dots in B, and circles with a checkered pattern indicate the positions of dots in C.

Next, the operation will be described. The operation of the signal system is almost the same as that of the first embodiment, and the video signal processing circuit 9 shown in FIG.
_The input video signal of each of the time T _A , the time T _B, and the time T _C is corresponding to the dot formed at the time _A , the time T _B, and the time T _C by being alternately arranged. Separation processing is performed according to the dot coordinates of the LCD at the timing. Then, the separated signals are appropriately output by making the scanning timing correspond to one field of time T _A , time T _B, and T _C. At that time, the scanning timings of the video signals for both the right eye and the left eye are also synchronized.

In response to the output signal from the video signal processing circuit 9, the LCD drive circuit 10 processes the video signal of 3 × speed into an LCD drivable signal and outputs it to the LCD 13 for control. The LCD 13 is scanned at three times the scanning speed of the original video signal, that is, 1/3 of the original scanning time. As a result, at time T _A , the image of the separated video signal corresponding to each dot coordinate of the LCD 13 at the position _A in FIG. 4 is displayed, and at time T _B , the LCD at the position _B is displayed.
Separated corresponding to each dot coordinate of 13 and further time T _C
In, the image of the separated video signal corresponding to each dot coordinate of the LCD 13 at the position C is displayed.

Note that time T _A , time T _B, and time T _C are 1
A total of 3 in 1/3 of the scanning time of the original video signal in the field
Since the scanning is performed once, the time of one field becomes equal to the scanning time of the original video signal. Next, the operation of the display optical system 15 on the right eye side will be described. Drive means 16
Is a dot pitch a (see FIG. 4) of the LCD 13 in the direction horizontal to the display surface by a guide or the like (not shown).
/ 3 step (1/3) a step by step, (2/3)
Vibrate with the amplitude of a. That is, the LCD 13 is at position A at time T _A , at position _{B at} time T _B , and at position _{C at} time T _C.

Then, time T _A , time T _B and time T _C
Is defined as one field, and is oscillated by the reciprocating motion in the horizontal direction so that it is present at position A again at time T _D. In this one field, the image of the video signal corresponding to each dot coordinate of the LCD 13 at the position A at time T _A is displayed, and the image of the video signal corresponding to each dot coordinate of the LCD 13 at position B at time T _B is displayed. The image is displayed and the LCD at position C at time T _C
The image of the video signal corresponding to each dot coordinate of 13 is displayed.

As a result, the LCD composite screens at the positions A, B and C are obtained as a whole, and the number of pixels of the composite screen apparently increases to three times the number of pixels of the LCD 13. In this case, while the image is displayed on the LCD 13 at the position A, there is no image display at the positions B and C, and similarly, while the image is displayed on the LCD 13 at the position B, the positions C and C are displayed. Since the image is not displayed at the positions A and B while the image is displayed on the LCD 13, the number of pixels displayed on the composite screen is exactly the same as the number of pixels on the LCD 13. However, since the scanning speed of the LCD 13 at each position is three times the scanning speed of the original video signal, the LCDs at the positions A, B and C within the original scanning time.
Since the scanning is performed, it is apparent to the observer that the three persons are displayed at the same time.

According to this embodiment, similar to the first embodiment, an image having the number of pixels apparently larger than the number of pixels of the LCD can be obtained, a high-definition image can be obtained, and the size and weight of the entire apparatus can be reduced. . Also, for example, by combining the first and second embodiments, L
By making the CD amplitude variable, it becomes possible to display images with different numbers of pixels and dot pitches on a single display device.

Example 3. Next, another embodiment in which the apparent number of pixels is doubled will be described. The configuration of the device, the movement operation of the LCD, and the combined state of the screen by the movement of the LCD are almost the same as those in the first embodiment and FIGS. 1 to 3, and the description of the same portions will be omitted. In FIG.
Reference numeral 11 denotes a display device main body, which has a shape of eyeglasses, and an image is displayed on a portion corresponding to the lens thereof. A video signal processing circuit 9 processes a video signal into a video signal corresponding to a predetermined dot pitch, time-compresses the video signal, and outputs the video signal.
The signal is time-compressed into a double speed signal, and the compressed signal is repeatedly output twice.

Reference numeral 10 denotes an LCD drive circuit which is provided on each of the right eye side and the left eye side and appropriately processes the output signal from the video signal processing circuit 9 into an LCD drivable signal. For example, the video signal processing circuit 9 repeatedly outputs twice. Of the output signals that are output, the first output signal is the LCD drive circuit on the right eye side.
The second output signal is received by the LCD drive circuit on the left eye side.

Next, the operation will be described. Regarding the operation of the signal system, the video signal processing circuit 9 shown in FIG.
The input video signal is time-compressed so that the scanning time becomes 1/2 of the original time, and is repeatedly output in synchronization with the timings of time T _A and time T _B. At that time, the scanning timings of the video signals for both the right eye and the left eye are also synchronized.

In response to the output signal from the video signal processing circuit 9, the LCD driving circuit 10 processes the double speed video signal into a signal capable of driving the LCD and outputs it to the LCD 13 for control. The LCD 13 is scanned at twice the scanning speed of the original video signal, that is, at half the original scanning time. As a result, displays the images of the video signal to each dot coordinate LCD13 at the position A in FIG. 2 at time T _A, time T _B
In, the image of the video signal is displayed at each dot coordinate of the LCD 13 at the position B. The video signals of the adjacent dots at the position A and the position B are the same. Further, since one field of time T _A and time T _B is scanned twice with a scanning time of 1/2 of the original video signal, the time of one field is equal to the scanning time of the original video signal.

Next, the operation of the display optical system 15 on the right eye side will be described. The driving means 16 uses an unillustrated guide or the like to move the LCD 13 in the horizontal direction to the display surface in a direction half the amplitude (1/2) a of the dot pitch a (see FIG. 2) of the LCD 13.
Vibrate with. That is, the LCD 13 is at position A at time T _{A and at} position B at time T _B. Then, the time T _A and the time T _B are set as one field, and the time T _C moves again by the reciprocating motion in the horizontal direction so that the time T _C exists again at the position A. Within this one field
L based on the first video signal at position A at time T _A
An image is displayed on the CD 13, and the same image as the image at the time T _A is displayed on the LCD 13 at the position B at the time T _B based on the second video signal.

As a result, a composite screen of the LCD at the position A and the position B as shown in FIG. 3 is obtained as a whole, two dots for displaying the same image are arranged in two rows, and the apparent composite screen has the number of pixels of the LCD 13. This means that the number of pixels has doubled. In this case, while the image is displayed on the LCD 13 at the position A, the image is not displayed at the position B, and the position B is similarly displayed.
Since the image is not displayed at the position A while the image is displayed on the LCD 13, the number of pixels displayed on the composite screen is exactly the same as the number of pixels on the LCD 13.

However, since the scanning speed of the LCD 13 at each position is twice the scanning speed of the original video signal, the LCD is scanned at the position A and the position B within the original scanning time, so that the observer sees it. Both appear to be displayed at the same time. In this way, the right-eye LCD and the left-eye LCD
Both LCDs by vibrating with the same vibrating element
Can be easily synchronized and vibrated, and the device can be downsized. In the case where the number of pixels is tripled, the operation of Example 2 may be applied to the above-described operation, and it is possible to obtain n times the number of pixels in the same manner.

According to the present embodiment, the same image is displayed for one of the adjacent pixels that have been combined for each color, and this does not provide more information than the number of pixels of the LCD. Since the pitch is half of the normal pitch, a high-definition image can be apparently obtained. Also, in combination with the first and second embodiments, the high resolution video may be appropriately switched as in the first and second embodiments, and the low resolution video may be appropriately switched as in the present embodiment. This makes it possible to effectively utilize the present device that can provide high-definition video. Further, similar to the first and second embodiments, the size and weight can be reduced, and the effect of making the device inexpensive can be obtained.

Example 4. Next, another embodiment in which the apparent number of pixels is doubled will be described. FIG. 6 is a configuration diagram showing the present embodiment. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. 18
Is a backlight capable of radiating from both sides, and 19 and 20 are arranged on the optical axis of each radiation surface of the backlight 18 and in close contact with the radiation surface, and modulate the light from the backlight 18 into image light. Right eye side LCD and left eye side LCD,
16 is connected to the backlight 18, and the backlight 18
And a guide (not shown) for limiting the moving direction of the backlight 18 to the horizontal direction with respect to the display surfaces of the right-eye side LCD 19 and the left-eye side LCD 20, respectively.

Reference numeral 21 is a right eye side LCD 19 and a left eye side LCD
In order to bend the optical axis of the image light from 20 at a right angle to the visual side, the mirrors are arranged at an angle of 45 ° with respect to the upper and lower sides of the right eye side LCD 19 and the left eye side LCD 20, and 14 is an optical axis bent at a right angle. Is a lens system arranged to correct the image light such as enlargement / reduction.

Next, the operation will be described. Regarding the operation of the signal system, the dots on the composite screen are the time T _A and the time T _B.
The video signal processing circuit 9 shown in FIG. 7 changes the input video signal to the time T in order to correspond to the dot formed by alternately arranging the dots at each time.
It is separated according to the dot coordinates of the LCD at each timing of _A and time T _B, and time-compressed into a double speed video signal. Then, the signal subjected to the separation / time compression processing is appropriately output with the scanning timing corresponding to one field of time T _A and time T _B. At that time, the LCD 19 on the right eye side,
The scanning timings of the video signals of both the left-eye side LCD 20 are matched, and even if these vibrate in opposite directions, the right-eye and left-eye are converted so that the same image can be obtained at the same time and output to the LCD drive circuit 10. .

In response to the output signal from the video signal processing circuit 9, the LCD drive circuit 10 processes this double speed video signal into a signal capable of LCD drive and outputs it to the LCD 13 for control. The LCD 13 is scanned at twice the scanning speed of the original video signal, that is, at half the original scanning time. As a result, at time T _A , an image of the separated video signal corresponding to each dot coordinate of the LCD 13 at the position _A in FIG. 2 is displayed, and at time T _B , the LCD at the position _B is displayed.
The image of the separated video signal corresponding to each dot coordinate of 13 will be displayed.

Further, since one field of time T _A and time T _B is scanned twice with a scanning time of 1/2 of the original video signal, the time of 1 field is equal to the scanning time of the original video signal. Will be equal. Next, the backlight 18 and LC
The operation of D19 and D20 will be described. The drive means 16 controls the backlight 18 to the right eye side L by a guide or the like (not shown).
Amplitude (1/2) of half the dot pitch a of the CD 19 and the LCD 20 on the left eye side in a direction horizontal to the display surface of these LCDs.
It is reciprocated by a and vibrated. At that time, backlight 1
The right-eye side LCD 19 and the left-eye side LCD 20 closely arranged on both sides of 8 also move together with the backlight 18.

That is, the LCD 19 on the right eye side is the same as that of the first embodiment and the drawings.
As in the case shown in 2, the time T_AAt position A at
Present and time T_B At position B at. And time
Interval T _A And time T_B Time as T_C To
And reciprocate in the horizontal direction so that it is in position A again.
Vibrates more. Within this one field, the time T_A 
Each dot of the LCD 19 on the right eye side at the position A in
The image of the video signal corresponding to the coordinates is displayed, and the time T_B 
Each dot on the LCD 19 on the right eye side at the position B
The image of the video signal corresponding to the coordinates is displayed.

The position of the LCD 20 on the left eye side is opposite to that of the LCD 19 on the right eye side at each time.
The output timing of the video signal in the field may be reversed. That is, the left-eye side LCD 20 displays the time T _A
At position B at, and at position A at time T _B. Then, at time T _A , the image of the video signal corresponding to each dot coordinate of the left-eye LCD 20 at the position B is displayed, and at time T _B , the image of the video signal corresponding to each dot coordinate of the left-eye LCD 20 at the position A. Is displayed.

As a result, the LCD composite screen at the position A and the position B as shown in FIG. 3 is obtained as a whole, and the number of pixels of the apparent composite screen has increased to twice the number of pixels of each LCD. . The configuration of this embodiment can be applied to the second and third embodiments. According to the present embodiment, high-definition images can be obtained as in the case of the first embodiment, and the effect of reducing the size and weight of the device can be obtained, and the backlight can be used for the right-eye side LCD,
Since it is shared by the left eye LCD, it is possible to obtain a smaller, lighter and cheaper device.

Moreover, by forming each LCD integrally with the backlight, the backlight, the right-eye LCD and the left-eye LCD reciprocally move integrally by the drive from the driving means, so that the right-eye side and the left-eye side are moved. The movements can be easily synchronized, and a highly accurate and easy-to-see device can be obtained for the observer. Further, if this embodiment is applied to the second and third embodiments, the effect of the second or third embodiment described above can be obtained in addition to the above-described effects.

Example 5. Next, another embodiment in which the apparent number of pixels is doubled will be described. FIG. 7 is a configuration diagram showing the present embodiment. In the figure, the same parts as those in the fourth embodiment are designated by the same reference numerals and the description thereof will be omitted. In the figure, 18 is a backlight capable of radiating from both sides, 22 is an endless belt arranged around the backlight 18 in a horizontal plane, and is movable in the horizontal direction by rotation of a rotating element 23 described later. In addition, the belt 22 may be configured such that a portion facing the backlight 18 in the moving range thereof is formed to be light-transmissive, and the area of the entire belt is increased to improve its durability.

19 and 20 are closely attached to the belt 22,
Right eye side L that modulates the light from the backlight 18 into image light
The CD, the LCD on the left eye side, and 23 are rotary elements for moving the belt 22 in the horizontal plane around the backlight 18.
It may be rotationally driven by another rotational driving means such as a motor, or may have a structure in which the motor itself is rotationally driven by incorporating a motor or the like. In either case, the rotation direction is reversed at a predetermined cycle, and the right eye LCD and the left eye are rotated. In the horizontal direction to the display surface of the side LCD, half the amplitude (1
/ 2) A belt 22 is reciprocated by a to move each LCD 19, 2
0 is vibrating.

Next, the operation will be described. The operation of the signal system is the same as in the first embodiment. In the reciprocating movement of each LCD, the belt 22 is rotationally driven by the rotating element 23,
The belt 22 and the LCD 1 on the right eye side that is closely attached to the belt 22
9. The left-eye LCD 20 is oscillated by reciprocating in the horizontal plane, that is, in the direction horizontal to the display surface of these LCDs at an amplitude (1/2) a which is half the dot pitch a of the LCD. Right eye side LC
D19 and the left-eye side LCD 20 are present at position A at time T _A in FIG. 2 and at position B at time T _B.
Then, with the time T _A and the time T _B as one field, at the time T _C , the vibration is generated by the reciprocating movement in the horizontal direction so as to be present at the position A again.

In this one field, the image of the video signal corresponding to each dot coordinate of the LCD at the position A at time T _A is displayed, and the video corresponding to each dot coordinate of the LCD at position B at time T _B is displayed. An image of the signal is displayed. As a result, a composite screen of the LCD at the position A and the position B as shown in FIG. 3 is obtained as a whole, and the number of pixels of the composite screen apparently increases to twice the number of pixels of the original LCD. The configuration of this embodiment can be applied to the second and third embodiments.

According to this embodiment, a high-definition image can be obtained as in the case of the first embodiment, the effect of reducing the size and weight of the device can be obtained, and the belt disposed around the backlight vibrates. Then, when the respective LCDs are viewed from the front, the right-eye LCD and the left-eye LCD vibrate in the same direction relative to the backlight (the two are moving in opposite directions when viewed from the top). The signal processing of can be made the same, and the signal processing can be simplified. Moreover, by forming each LCD integrally with the belt, the belt driving causes the right-eye LCD and the left-eye LCD to integrally vibrate,
Vibrations on the right-eye side and the left-eye side can be easily synchronized, and an extremely accurate device that is easy for an observer to see can be obtained. Further, if this embodiment is applied to the second and third embodiments, the effect of the second or third embodiment described above can be obtained in addition to the above-described effects.

Example 6. Next, another embodiment in which the apparent number of pixels is doubled will be described. FIG. 8 is a partial perspective view showing the configuration of the characteristic optical system of the present invention. The overall configuration except this optical system is the same as that of the fifth embodiment, and the description thereof is omitted. In the figure, 19 and 20 are right eye side LCDs that modulate the light from the backlight 18 into image light,
Left eye side LCD, 24 is right eye side LCD 19 and left eye side LC
An LCD support part that surrounds and supports D20, and includes a right-eye side LCD support part 24R and a left-eye side LCD support part 24L.
Consists of.

Reference numeral 25 is an expansion / contraction member composed of a coil spring connected between the right eye side LCD support portion 24R and the left eye side LCD support portion 24L. The extension / contraction member 25 is displayed on the display surface of each LCD 19, 20 by a driving means (not shown). By expanding and contracting in a horizontal direction at a predetermined cycle, the right eye LCD 19 and the left eye LCD 20 are interlocked with this, and the amplitude of half the dot pitch a of these LCDs (1/2) in the direction horizontal to the display surface. It reciprocates at a and vibrates.

Next, the operation will be described. The operation of the signal system is the same as in the first embodiment. In the reciprocating movement of the LCD, when the expanding / contracting member 25 expands / contracts by the driving force from the driving means, the LCD supporting part 24 and the right-eye side LCD 19 and the left-eye side LCD 20 supported by the LCD supporting part 24 according to the expanding / contracting motion.
Is L in the horizontal plane, that is, in the direction horizontal to the display surface of these LCDs.
It oscillates by reciprocating with an amplitude (1/2) a which is half the dot pitch a of the CD. Right eye side LCD 19 and left eye side LCD 2
0 exists at position A at time T _A in FIG. 2 and time T _B
At position B at. Then, with time T _A and time T _B as one field, at position T _C again position A
It vibrates due to the reciprocating movement in the horizontal direction.

[0071] Video within this one field, displays the images of the video signal corresponding to each dot coordinate of the LCD at the location of the time T _A in A, corresponding to each dot coordinate of the LCD at the location of the time T _B in B An image of the signal is displayed. As a result, an overall LCD composite screen at position A and position B as shown in FIG. 3 is obtained,
Apparently, the number of pixels in the composite screen has doubled the number of pixels in the original LCD. The structure of this embodiment is the same as that of the second embodiment.
The case of 3 is also applicable.

According to the present embodiment, high-definition images can be obtained as in the case of the first embodiment, and the effect of reducing the size and weight of the device can be obtained. Further, when the respective LCDs are viewed from the front, the right eye by the elastic member is used. Since the side LCD and the left-eye side LCD move in the same direction relative to the backlight, the left and right signal processing can be the same and the signal processing becomes simple. Moreover, since the right-eye LCD and the left-eye LCD are driven and moved by the same driving means, it is possible to easily synchronize the vibrations on the right-eye side and the left-eye side, and it is possible to provide a highly accurate device that is easy for the observer to see. can get. Further, since the number of worn parts is smaller than that in the case of belt driving, the durability is good and the vibration speed can be easily increased. In addition, this embodiment is the second embodiment,
If it is applied to No. 3, in addition to the above-mentioned effects, the above-mentioned second embodiment
Alternatively, the effect of 3 can be obtained.

Example 7. Next, another embodiment in which the apparent number of pixels is doubled will be described. FIG. 9a is a partial plan view showing the configuration of an optical system characteristic of the present invention, and FIG. 9b is a partial side view thereof. The overall configuration except this optical system is the same as that of the fifth embodiment, and the description thereof is omitted. . In the figure, 24R and 24L are respectively the right eye side LCD support portion,
LC support on the left eye side LCD support by a guide not shown
It is configured to be movable only in the horizontal direction on the display surface of D.

26R and 26L each have one end on the right eye side L
An arm movably connected to the CD supporting portion 24R and the left eye side LCD supporting portion 24L with the other end displaced from the rotation axis of a rotating portion 27 described later, and 27 is a right eye side LCD 19 and a left eye side LCD 20 in a direction perpendicular to the optical axis. Has a diameter of an amplitude (1/2) a which is approximately half the dot pitch a of the two, and the ends of the arms 26R and 26L are movably connected to both ends of the diameter of this circle and opposite surfaces. The right-eye side LC 19 and the left-eye side LCD 20 have a right eye LC with a half (amplitude) a of a dot pitch a of these LCDs in a direction horizontal to the display surface.
It is a rotating unit that reciprocates the D19 and the left-eye LCD 20. The rotating unit 27 is rotated by a driving unit (not shown) such as a motor, and transmits the driving force to the supporting unit 24.

Next, the operation will be described. The operation of the signal system is the same as in the first embodiment. In the reciprocating movement of the LCD, when the rotating portion 27 is rotated by the driving force of the driving means, this rotating drive causes the rotating portion 27 side of the arms 26R and 26L to make a rotational movement, and is transmitted to the LCD supporting portion 24 side as a reciprocating movement. To do. The LCD support portion 24 and the right eye side LCD 19 and the left eye side LCD 20 supported by the LCD support portion 24 are
It moves back and forth in a direction horizontal to the display surface of the CD with an amplitude (1/2) a which is half the dot pitch a of the LCD. Arm 26R
Since 26 and 26L are connected to the rotating portion 27 with a half-rotation offset, the right-eye side LCD 19 and the left-eye side LCD 20 are at position A at time T _A in FIG. 2 and at position B at time T _B. Then, with the time T _A and the time T _B as one field, at the time T _C , the vibration is generated by the reciprocating movement in the horizontal direction so as to be present at the position A again.

[0076] Video within this one field, displays the images of the video signal corresponding to each dot coordinate of the LCD at the location of the time T _A in A, corresponding to each dot coordinate of the LCD at the location of the time T _B in B An image of the signal is displayed. As a result, an overall LCD composite screen at position A and position B as shown in FIG. 3 is obtained,
Apparently, the number of pixels in the composite screen has doubled the number of pixels in the original LCD. The structure of this embodiment is the same as that of the second embodiment.
The case of 3 is also applicable.

According to this embodiment, as in the case of the first embodiment, a high-definition image can be obtained, the effect of reducing the size and weight of the device can be obtained, and the signal processing can be simplified. In addition, since the right-eye LCD and the left-eye LCD vibrate by the same driving means and rotating part, the vibrations on the right-eye side and the left-eye side can be easily synchronized, and the amplitude is the diameter of the rotating part. Since it is determined by the above, there is no variation and is accurate, and an extremely accurate device that is easy for an observer to see can be obtained. Moreover, since the rotating portion rotates only in one direction, the structure of the driving means can be simple and inexpensive, and the driving means can be driven with a small amount of power. Also,
Since the number of worn parts is smaller than that of the belt drive, the durability is good and the moving speed can be easily increased. If this embodiment is applied to the second and third embodiments, the effect of the second or third embodiment described above can be obtained in addition to the above effects.

Example 8. Next, another embodiment in which the apparent number of pixels is doubled will be described. FIG. 10 is a partial perspective view showing the configuration of the characteristic optical system of the present invention. The overall configuration except this optical system is the same as that of the fifth embodiment, and the description thereof is omitted. In the figure, 28R and 28L are the right eye LCD support portion 24R and the left eye LCD support portion 24L.
Are formed integrally so that they face each other at the top of
A right-eye rack and a left-eye rack having teeth on the opposite side.

Reference numeral 29 is provided between the right-eye rack 28R and the left-eye rack 28L so as to mesh with both, and the driving force from driving means such as a motor (not shown) is applied to the right-eye LCD support portion 24R and the left-eye LCD support portion. 24 L, and while rotating the rotation direction at a predetermined cycle, the right eye side LCD 19 and the left eye side LCD 20 are moved in a direction horizontal to the display surfaces of these LCDs so that the amplitude (1/2) a of the dot pitch a of the LCD is half.
It is a pinion that moves back and forth.

Next, the operation will be described. The operation of the signal system is the same as in the first embodiment. In the movement operation of the LCD, when the pinion 29 repeats forward and reverse rotations at a predetermined cycle by the rotational drive from the driving means, the right-eye rack 28R and the left-eye rack 28L respectively move in opposite directions, and LC
The D support section 24 and the right-eye side LCD 19 supported by the D support section 24,
The left-eye side LCD 20 has an amplitude (1/2) a that is half the dot pitch a of the LCD in a direction horizontal to the display surface of these LCDs.
It reciprocates and vibrates. As a result, the LCD 19 on the right eye side
And the left-eye side LCD 20 is at position A at time T _A in FIG.
And at position B at time T _B. Then, with time T _A and time T _B as one field, time T
_{At C,} it reciprocates in the horizontal direction so as to be at the position A again.

[0081] Video within this one field, displays the images of the video signal corresponding to each dot coordinate of the LCD at the location of the time T _A in A, corresponding to each dot coordinate of the LCD at the location of the time T _B in B An image of the signal is displayed. As a result, an overall LCD composite screen at position A and position B as shown in FIG. 3 is obtained,
Apparently, the number of pixels in the composite screen has doubled the number of pixels in the original LCD. The structure of this embodiment is the same as that of the second embodiment.
The case of 3 is also applicable.

According to the present embodiment, high-definition images can be obtained as in the case of the first embodiment, the effect of reducing the size and weight of the device can be obtained, and the signal processing can be simplified. Moreover, since the right-eye LCD and the left-eye LCD are driven by the same pinion to reciprocate, the right-eye and left-eye vibrations can be easily synchronized, and the amplitude is determined by the number of rotations of the pinion. It is possible to obtain a highly accurate device that is uniform and accurate and is easy for the observer to see. Further, since the rack and pinion configuration does not take up space, the device can be made smaller. If this embodiment is applied to the second and third embodiments, the effect of the second or third embodiment described above can be obtained in addition to the above effects.

[0083]

As described above, according to the in-eye image display device of the present invention, a transmissive display element having a backlight for a light source, and a lens system for optically processing the image light from the transmissive display element. A video signal processing circuit for separating a video signal into a plurality of signals and time-compressing and outputting the plurality of signals, and a display element drive circuit for processing an output signal from the video signal processing circuit into a signal that can be driven by a display element, Since the driving means for reciprocating the transmissive display element in a direction parallel to the display surface thereof is provided in synchronization with the scanning timing of the video signal, the number of optical components of the device is reduced, and high definition, small size and light weight can be realized. The effect is obtained.

Further, the video signal is separated into n equal parts of the dot pitch of the transmissive display element, extracted for each dot pitch, and these extracted signals are time-compressed into signals of n-fold speed of the original video signal and successively. A video signal processing circuit for outputting, a transmissive display element that scans light from the backlight n times within the scanning time of the original video signal based on a signal from the display element driving circuit, and modulates the image light into a transmissive display element; Driving means for moving the transmissive display element in a direction parallel to the display surface of the display element by 1 / n of the dot pitch at each scanning timing of the pattern display element and reciprocating with the scanning time of the original video signal as one cycle. With the above, it is possible to obtain an effect that a high-definition image having the number of pixels n times as large as that of the display element can be obtained, and the number of optical components of the device is reduced, and the device can be made compact and lightweight.

Further, a video signal processing circuit for extracting a video signal corresponding to the dot pitch of the transmissive display element, time-compressing the extracted signal into a m-times speed signal of the original video signal, and outputting m times. , A transmissive display element that scans light from a backlight m times within a scanning time of an original video signal based on a signal from a display element driving circuit and modulates the image light, and at each scanning timing of the transmissive display element. Since the transmission type display element is provided with a driving means for moving the transmissive display element in a direction parallel to the display surface of the display element by 1 / m of the dot pitch and reciprocating with the scanning time of the original video signal as one cycle, The number of pixels above can be made m times as large as that of the display element, and a high-definition image can be obtained. Moreover, the number of optical components of the device can be reduced, and the size and weight can be reduced.

A double-sided radiation type backlight,
Since at least two transmissive display elements, which are arranged to face each light emitting surface of the backlight, and an optical member for optically processing the image light from each transmissive display element are provided, the backlight is provided. By sharing the components, it is possible to reduce the number of parts, and it is possible to reduce the size and weight while obtaining high-definition images.

Further, since the backlight and the transmissive display element are integrated, a stable light source can be obtained, and it is possible to reduce the size and weight while obtaining a high-definition image. Further, according to the fourth aspect, it is possible to easily synchronize the vibrations of the right-eye side display element and the left-eye side display element and improve the accuracy of the display element.

Further, an endless belt arranged around the backlight, a driving means capable of reciprocating the belt and capable of rotating in the forward and reverse directions, and a transmissive type attached to the belt so as to face the light emitting surface of the backlight, respectively. Since it has a display element, it can be made compact and lightweight while obtaining high-definition images, and the right-eye display element and the left-eye display element can be vibrated in the same direction, which simplifies signal processing and reduces vibration. The effect that the synchronization can be easily obtained is obtained.

Further, since the expansion / contraction member is provided which is connected to the two transmissive display elements and reciprocates the respective display elements in the direction parallel to the display surface by the driving force from the driving means, the signal processing is simplified. , Synchronization of vibration can be easily obtained,
It is possible to obtain a high-definition image while reducing the size and weight, and to obtain the effect of easily increasing the vibration speed with few wear parts.

Further, a rotating portion having a rotating shaft in a direction perpendicular to the display surface of the transmissive display element and rotated by a driving force from the driving means, the rotating portion and the two transmissive display elements. Since it is provided with a connecting member that connects and transmits the rotational force from the rotating portion as a reciprocating motion, signal processing is simplified, vibration can be easily synchronized, and high-definition images can be obtained while being small and lightweight. The effect that the vibration accuracy is improved and the accuracy is increased can be obtained.

Further, since the two transmissive display elements are provided with a rack provided so as to face each other, a pinion that engages with both of the racks, and a drive means for rotationally driving the pinion, signal processing is performed. Easy,
The vibrations can be easily synchronized, a high-definition image can be obtained, and the vibrating element can be downsized to be smaller and lighter and the vibration accuracy can be improved.

Further, according to the image display method of the present invention, the video signal is separated into a plurality of signals, the respective signals are time-compressed to shorten the scanning time, and the shortened signal is converted into the original scanning time of the video signal. Output to the display unit inside the display unit, the position of the dot is periodically moved within the dot pitch of the display unit, and the moving period and the scanning timing of the display unit are synchronized to synthesize the image, thereby The number of pixels more than the number of pixels can be obtained, and an effect that high-definition video display can be obtained is obtained.

Further, the video signal is time-compressed to shorten the scanning time, and the signal shortened within the original scanning time of the video signal is output to the display unit a plurality of times to determine the dot position within the dot pitch of the display unit. By moving the image periodically and synthesizing the images by synchronizing the movement period and the scanning timing of the display unit, it is possible to obtain an effect that the number of pixels apparently larger than the number of pixels of the display unit is obtained.

Further, the video signal is separated into n equal parts of the dot pitch of the display section and extracted for each dot pitch,
These extracted signals are time-compressed into a signal that is n times as fast as the original video signal to shorten the scanning time, and these shortened signals are output to the display unit so as to scan within the original scanning time of the video signal. The scanning time of the video signal is set as one cycle, and 1 / n of the dot pitch of the display unit is set for each scanning timing of the display unit
By moving the positions of the dots only in a predetermined direction parallel to the display surface and combining the images, the number of pixels n times the number of pixels in the display section can be obtained, and an effect of high-definition image display can be obtained.

Further, the video signal is extracted corresponding to the dot pitch of the display section, the extracted signal is time-compressed to a signal of m times the speed of the original video signal, and the shortened signal is converted into the video signal. The output is repeatedly output to the display unit so as to scan m times within the original scanning time, and the dot position is 1 / m of the dot pitch of the display unit for each scanning timing of the display unit with the scanning time of the original video signal as one cycle. By moving in a predetermined direction parallel to the display surface and combining the images,
The number of pixels that is m times the number of pixels in the display unit can be obtained, and an effect that a high-definition image can be obtained can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a front-of-eye image display device according to a first embodiment of the present invention.

FIG. 2 is a state diagram showing a moving state of the display element of the front-of-eye image display device according to Embodiments 1 and 3 to 8 of the invention.

FIG. 3 is a state diagram showing a composite screen of the front-of-eye image display device according to Embodiments 1 and 3 to 8 of the invention.

FIG. 4 is a state diagram showing a moving state of the display element of the front-of-eye image display device according to the second embodiment of the present invention.

FIG. 5 is a state diagram showing a composite screen of the front-of-eye image display device according to the second embodiment of the present invention.

FIG. 6 is a schematic configuration diagram showing a front-of-eye image display device according to a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram showing a front-of-eye image display device according to a fifth embodiment of the present invention.

FIG. 8 is a partial perspective view showing a front-of-eye image display device of Embodiment 6 of the present invention.

9A and 9B are a partial top view and a partial side view showing a front-of-eye image display device according to a seventh embodiment of the present invention.

FIG. 10 is a partial perspective view showing the front-of-eye image display device of Embodiment 8 of the present invention.

FIG. 11 is a schematic configuration diagram showing an optical system of a conventional in-eye image display device.

FIG. 12 is a perspective view showing a conventional in-eye image display device.

FIG. 13 is a schematic configuration diagram showing a conventional in-eye image display device.

[Explanation of symbols]

 9 Video signal processing circuit 10 LCD drive circuit 11 Display device 12 Backlight 13 LCD 16 Vibrating element 19 Right eye side LCD 20 Left eye side LCD 21 Mirror 22 Belt 23 Rotating element 25 Stretching member 26 Arm 27 Rotating part 28 Rack 29 Pinion

Front page continued (72) Inventor Norihiro Ashizaki 5-1-1 Ofuna, Kamakura-shi Personal Information Equipment Development Laboratory, Mitsubishi Electric Corporation (72) Inventor Masafumi Takano 5-1-1 Ofuna, Kamakura-shi Mitsubishi Electric Corporation Company Personal Information Equipment Development Laboratory

Claims (13)

[Claims] 1. A transmissive display device having a backlight for a light source, a lens system for optically processing image light from the transmissive display device, and a video signal separated into a plurality of signals and time-compressed. A video signal processing circuit for outputting, a display element driving circuit for processing an output signal from the video signal processing circuit into a signal that can be driven by the display element, and the transmissive display element in synchronization with a scanning timing of the video signal. And a driving means for reciprocating the lens in a direction parallel to the display surface thereof. 2. A video signal is separated into n equal parts of the dot pitch of the transmissive display element, extracted for each dot pitch, and these extracted signals are time-compressed into signals of n-times speed of the original video signal. A video signal processing circuit that sequentially outputs, and a transmissive display element that scans light from the backlight n times within a scanning time of the original video signal based on a signal from the display element driving circuit to modulate the light into image light. , For each scanning timing of the transmissive display element, the transmissive display element is moved to 1 / of the dot pitch in a direction parallel to the display surface of the display element
2. The front-of-eye image display device according to claim 1, further comprising a driving unit that moves back and forth while moving the original video signal by one cycle while moving by n. 3. A video signal processing circuit for extracting a video signal corresponding to a dot pitch of the transmissive display element, time-compressing the extracted signal into a m-times speed signal of the original video signal, and outputting m times. A transmissive display element for scanning light from the backlight based on a signal from the display element drive circuit m times within a scanning time of an original video signal to modulate the light into image light; and scanning of the transmissive display element Drive means for moving the transmissive display element at each timing in the direction parallel to the display surface of the display element by 1 / m of the dot pitch and reciprocating with the scanning time of the original video signal as one cycle. The in-eye image display device according to claim 1, wherein 4. A double-sided emission type backlight, at least two transmissive display elements arranged facing each light emitting surface of the backlight, and image light from each transmissive display element is optically transmitted. The in-eye image display device according to claim 1, further comprising: an optical member that selectively processes the image. 5. The in-eye image display device according to claim 1, wherein the backlight and the transmissive display element are integrated. 6. An endless belt arranged around the backlight, a driving means capable of reciprocating movement of the belt and revolving forward and backward, and attached to the belt so as to face a light emitting surface of the backlight, respectively. The in-eye image display device according to claim 4, further comprising a transmissive display element. 7. An expansion / contraction member, which is connected to two transmissive display elements and reciprocates each of these display elements in a direction parallel to a display surface thereof by a driving force from the driving means. 4. The in-eye image display device according to 4. 8. A rotary unit having a rotary shaft in a direction perpendicular to a display surface of the transmissive display device and rotated by a driving force from the driving means, and the rotary unit and two transmissive display devices. 5. The in-eye image display device according to claim 4, further comprising: a connecting member that connects and to transmit the rotational force from the rotating unit as a reciprocating motion. 9. A rack provided with two transmissive display elements so as to face each other, a pinion meshing with both of these racks, and a drive means for rotationally driving this pinion. The in-eye image display device according to claim 4. 10. A video signal is separated into a plurality of signals, each signal is time-compressed to shorten the scanning time, and the shortened signal is output to the display unit within the original scanning time of the video signal, and the display unit is displayed. The image display method characterized in that the positions of the dots are periodically moved within the dot pitch, and the images are combined by synchronizing the movement cycle and the scanning timing of the display section. 11. A video signal is time-compressed to shorten a scanning time, the shortened signal is output to a display unit a plurality of times within an original scanning time of the video signal, and a dot pitch in the display unit is reduced. An image display method characterized by synthesizing images by periodically moving a position and synchronizing the movement cycle and the scanning timing of the display unit. 12. A scanning time, wherein a video signal is separated into n equal parts of a dot pitch of a display part and extracted for each dot pitch, and these extracted signals are time-compressed into an n-times speed signal of the original video signal. Are output to the display unit so as to scan within the original scanning time of the video signal, and the scanning time of the original video signal is defined as one cycle, and the output of the display unit is changed at each scanning timing of the display unit. 1 / dot pitch
11. The image display method according to claim 10, wherein the positions of the dots are moved by n in a predetermined direction parallel to the display surface to synthesize the images. 13. A video signal is extracted corresponding to a dot pitch of a display unit, the extracted signal is time-compressed to a m-times speed signal of the original video signal, and the shortened signal is converted into the video signal. Output to the display unit repeatedly so as to scan m times within the original scanning time of
12. The image display according to claim 11, wherein the image is synthesized by moving the dot position in a predetermined direction parallel to the display surface by 1 / m of the dot pitch of the display unit as a cycle at every scanning timing of the display unit. Method.