JP2000270284A - Projection display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a picture with much presence onto a projection screen by displaying a picture with high resolution and sufficiently satisfied image quality and increasing a ratio in a horizontal direction. SOLUTION: Reflection spatial optical modulation plates 1, 2, 3 are provided with a pixel area where 1024-1080 pixels are placed vertically and 3840-4096 pixels are placed horizontally in a matrix form with an aspect ratio of about 16:9 with pixel electrodes placed at a pitch of 14.7-14.9 μm vertically and 7.5-7.7 μm horizontally. Then a projection lens 19 provided with an anamorphic lens 20 is used to project a picture on the pixel area of the reflection spatial optical modulation plates 1, 2, 3 onto a projection screen as a picture with about square pixels with an aspect ratio of about 4:1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection type light modulation means formed of, for example, a liquid crystal member or a cathode ray tube member, and projects an image having an aspect ratio different from (or the same as) the original image onto a display means such as a screen. More particularly, the present invention relates to a projection type display device for improving the resolution of a display image.

[0002]

2. Description of the Related Art Conventionally, a video projector uses a CRT (cathode ray tube) as a display means of a projection source image, and directly optically enlarges an image displayed on the CRT and projects the image on a projection screen. There is a type in which a small liquid crystal panel is used as a projection source image display means, and the liquid crystal panel is driven as a light valve to optically magnify a displayed image and project the image on a projection screen.

Further, these video projectors use a so-called anamorphic lens (or anamorphic lens) capable of forming images having different magnifications in the horizontal direction and the vertical direction (horizontal direction and vertical direction of the image). There are some which can project an image having an aspect ratio different from the aspect ratio of the projection source image on a projection screen.

The following various apparatuses have been disclosed as video projectors using a liquid crystal panel as a projection source image display means and an anamorphic lens as an image aspect ratio conversion means.

For example, Japanese Patent Application Laid-Open No. Hei 8-163777 (Japanese Patent Application No. 6-307990) discloses a data signal having a pixel-to-pixel aspect ratio of 1: 1 and an image aspect ratio (screen aspect ratio). Ratio) is 16: 9 in a so-called HDTV (high definition television) signal, and in a projection type liquid crystal display device capable of enlarging and projecting, a horizontal and vertical pixel interval ratio is a: 1 (a = 1). .1 to 1.2) are projected through an anamorphic lens whose maximum magnification ratio in the orthogonal direction is equal to a: 1. It has been disclosed.

Further, Japanese Patent Application Laid-Open No. 6-95063 (Japanese Patent Application No.
No. 272293) discloses a so-called Hi-Vision signal having an aspect ratio of 16: 9 which is compressed and input to a liquid crystal display panel which displays an image having an aspect ratio of 4: 3. There is disclosed a method of controlling a projection display apparatus capable of displaying an image having an aspect ratio of 16: 9 by optically enlarging an image displayed on a liquid crystal display panel displaying an image with an anamorphic lens in the horizontal direction. I have.

According to the video projectors (projection type liquid crystal display devices, projection type display devices) described in these publications, a liquid crystal corresponding to an aspect ratio of 4: 3 of a standard television system which has been more widely used than before. A panel (a liquid crystal light valve, a light modulation type display, a liquid crystal display panel) is used as a projection source image display means, and a projection source image having an aspect ratio of 4: 3 displayed on the liquid crystal panel is horizontally projected through an anamorphic lens. By enlarging in the direction (enlargement of about 1.5 times), an image having an aspect ratio of 16: 9 such as HDTV (high definition television) or high vision can be enlarged and displayed on the projection screen.

Further, Japanese Patent Application Laid-Open No. Hei 8-322060 (Japanese Patent Application No. 7-152198) discloses that each color component of three primary colors of R light (red light), G light (green light), and B light (blue light). Of the images, the images corresponding to the two colors are independently divided and displayed on one light modulation type display in a compressed state, and the images corresponding to the remaining one color are displayed on the single light modulation type display. Two images obtained by compressing and displaying the compressed images of the two colors by optical decompression means and the uncompressed one
There is disclosed a video projector that combines a color image and emits the combined image.

[0009] That is, according to the video projector described in the publication, among the respective color components of R light, G light and B light,
Displaying two images corresponding to two colors in a compressed manner on one light modulation type display, and displaying one image corresponding to the remaining one color in an uncompressed manner on one light modulation type display, By compressing and displaying the compressed image of two colors in the vertical or horizontal direction twice through an optical expansion means (anamorphic lens) and combining it with the uncompressed image of the remaining one color, A color image can be displayed on the projection screen.

[0010]

By the way, the above-mentioned Japanese Patent Application Laid-Open No. Hei 8-163377 (Japanese Patent Application No. 6-307990) and Japanese Patent Application Laid-Open No. Hei 6-95063 (Japanese Patent Application No. 4-272293) are disclosed.
In the conventional video projector as disclosed in Japanese Patent Application Laid-Open No. H11-209, the aspect ratio of the image to be displayed on the projection screen is 16: 9, but the aspect ratio of the image to be projected is 4: 9. : 3, there is a problem that it is difficult to say that the quality of the image actually displayed on the projection screen is sufficient.

That is, an image having an aspect ratio of 16: 9 displayed on the projection screen is originally high resolution and high quality H.
It should be an image such as DTV or Hi-Vision,
A liquid crystal panel or the like which displays an image having an aspect ratio of 4: 3 of a standard television system which is inexpensive and more widely used than before is used as the projection source image display means, and the aspect ratio displayed on the liquid crystal panel is 4. : 3 image is enlarged and projected on the projection screen to generate and display an image with an aspect ratio of 16: 9. Therefore, the image on the projection screen has the number of pixels originally required in HDTV, HDTV or the like. Therefore, the resolution is low and the image quality is insufficient. In particular, in a case where an image having an aspect ratio of 16: 9, which is obtained by enlarging a projection source image having an aspect ratio of 4: 3 in the horizontal direction (enlarged to about 1.5 times), is displayed on the projection screen in an enlarged manner, Resolution becomes lower.

Japanese Patent Application Laid-Open No. 8-322060 (Japanese Patent Application No.
In the conventional video projector disclosed in JP-A-152198), two images corresponding to two colors among images of each color of R light, G light and B light are compressed and one light modulation is performed. While the image is divided and displayed on the LCD display, one image corresponding to the remaining one color is displayed on the light modulation type display in an uncompressed state (full screen display). 2 above displayed
The resolution of the image for the color differs from the resolution of the remaining one color.

Accordingly, two images obtained by decompressing two colors of the compressed image divided and displayed on one light modulation type display in a compressed state and one image displayed on one light modulation type display in a non-compressed state are displayed. When an image for one color is synthesized, the resolution is low and the image quality is insufficient.

Further, in recent years, it has been desired to introduce a video projector capable of displaying a more realistic image by further increasing the ratio in the horizontal direction. If the ratio is larger than the current ratio, the resolution in the horizontal direction is significantly reduced, and it is very difficult to display a good image.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and makes the aspect ratio (aspect ratio) of a projection source image different from the aspect ratio of an image projected on a projection screen. Even in the case of enlarged display, it is possible to display an image with high resolution and satisfactory image quality, and to increase the ratio in the horizontal direction to display a more realistic image on the projection screen. It is an object of the present invention to provide a projection display device capable of performing the following.

[0016]

According to a first aspect of the present invention, there is provided a projection type display apparatus comprising: a light source for emitting predetermined light; and at least original image information. Driven by image information of the same amount of information, by reflecting light from the light source, a reflective light modulating means for forming image light corresponding to the driven image information, and from the reflective light modulating means And projecting means for optically converting the image light having the predetermined aspect ratio into image light having an aspect ratio different from at least the aspect ratio of the image light and projecting the image light on the display means.

In such a projection type display device, by driving the reflection type light modulating means with at least the same amount of image information as the original image information, the information of the image light formed by the reflection type light modulating means is obtained. The amount is at least the same as the information amount of the original image information.

According to a second aspect of the present invention, in the projection type display apparatus, the aspect ratio of the image information for driving the reflection type light modulation unit and the aspect ratio of the reflection type light modulation unit are 16: 9, wherein the projection unit optically converts the image light having an aspect ratio of 16: 9 formed by the reflection type light modulation unit into image light having an aspect ratio of 4: 1 and projects the image light on a display unit. This solves the problem described above.

In such a projection display device, by setting the aspect ratio of the image projected on the display means to 4: 1, the ratio in the horizontal direction is increased, and a more realistic image can be displayed. .

It is to be noted that the projection means has an optical characteristic for optically converting image light having a predetermined aspect ratio from the reflection type light modulation means into image light having an aspect ratio different from that of the image light. By using the anamorphic lens having the above, the aspect conversion can be performed without deteriorating the quality (resolution or the like) of the projected image.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the projection display device according to the present invention will be described below in detail with reference to the drawings. The projection type display device according to the present invention can be applied to a projection type liquid crystal display device having a reflection type liquid crystal member.

FIG. 1 shows an overall configuration of an optical system of a projection type liquid crystal display device according to an embodiment of the present invention. FIG.
FIG. 3 mainly shows a configuration of a light source system in the optical system of the projection type liquid crystal display device of the present embodiment, and FIG. 3 shows a main portion of the optical system of the projection type liquid crystal display device of the present embodiment. 2 shows the configuration of the projection system. In the projection type liquid crystal display device of the present embodiment, the light source system and the projection system are two.
It has a multi-story structure, and the light source system is arranged on the lower side. Note that optical components of components common to both the light source system and the projection system are described in both FIG. 2 and FIG.

As shown in FIGS. 1 and 2, the projection type liquid crystal display device according to the present embodiment has a light source lamp 18, a first condenser lens 17, a first cold mirror 16 as main components of a light source system. , Second condenser lens 1
5, UV filter 14, first integrator 13, second integrator 12, second cold mirror 11,
Collimator lens 10, first dichroic mirror 9, second dichroic mirror 7, reflection mirror for B light (blue light) (third dichroic mirror) 8, steering mirror for R light (red light) PBS4 (polarized beam Splitter), Steering mirror for G light (green light) PBS5, Steering mirror for B light (blue light) P
BS6 etc. are provided. This light source system includes a light source lamp 18.
R light (red light), G light (green light),
Extract each color component of B light (blue light),
A specific polarized light component is extracted from each light component of light, G light, and B light, and the extracted polarized light components of each light component of R light, G light, and B light are read out light as R light (red light) described later. (Light), a reflective spatial light modulator 1, a G light (green light) reflective spatial light modulator 2, and a B light (blue light) reflective spatial light modulator 3. Is what it is.

As shown in FIGS. 1 and 3, the projection type liquid crystal display device according to the present embodiment comprises a reflection type spatial light modulator 1 for R light (red light) as a main component of the projection system. G light (green light) reflective spatial light modulator 2, B light (blue light) reflective spatial light modulator 3, R light steering mirror P
BS4, G light steering mirror / PBS5, B light steering mirror / PBS6, first dichroic mirror 9, second dichroic mirror 7, reflection mirror for B light (third dichroic mirror) 8, projection lens 19, An anamorphic lens 20 and the like are provided. The R-light steering mirror / PBS4, the G-light steering mirror / PBS5, and the B-light steering mirror / PBS6 of this projection system are an R-light reflective spatial light modulator 1 and a G-light reflective spatial light modulator 2. , B light reflective spatial light modulator 3
Is provided as a polarized light component extracting means for extracting only a polarized light component which is reflected by each of the reflection type spatial light modulators 1 to 3 and modulated into a specific polarized light component among the above-mentioned readout light incident on the light source.

In the projection type liquid crystal display device of the present embodiment, the optical components common to both the light source system and the projection system are a first dichroic mirror 9, a second dichroic mirror 7, a reflection mirror for B light. 8. Steering mirror for R light, PBS4, Steering mirror for G light, PB
S5, steering mirror for B light, PBS6.

First, the path of light source light in the light source system shown in FIG. 2 and the function of each optical component of this light source system will be described.

The light source lamp 18 generates light mainly composed of a visible light component.
7 is incident.

The first condenser lens 17 is a lens for concentrating light in a desired direction. Here, since the light source light emitted from the light source lamp 18 is diffused light, the diffused light is condensed by the first condenser lens 17 and made incident on the first cold mirror 16.

The first cold mirror 16 is a mirror that transmits infrared light and reflects other light components. Here, the light source light generated by the light source lamp 18 is light including infrared light and ultraviolet light in addition to visible light. Therefore, the first cold mirror 16 transmits only infrared light from the light source light and reflects other light components. The light reflected by the first cold mirror 16 enters the second condenser lens 15.

The second condenser lens 15, like the first condenser lens 17, is a lens for concentrating light in a desired direction. This second condenser lens 1
In 5, the light reflected by the first cold mirror 16 is incident on the UV filter 14.

The UV filter 14 is a filter that emits only the remaining light components obtained by removing ultraviolet light from incident light. At this time, the light obtained by removing the infrared light from the light source light by the first cold mirror 16 is incident on the UV filter 14, and the UV light is further removed therefrom. Only visible light is emitted. The light emitted from the UV filter 14 is
The light enters the first integrator 13.

The first integrator 13 and the next second integrator 12 are lens arrays for reducing flicker and uneven illuminance of the light source lamp 18. The light that has passed through these first and second integrators 13 and 12 is
The light enters the second cold mirror 11.

Like the first cold mirror 16, the second cold mirror 11 is a mirror that transmits only infrared light from incident light and reflects other light components. The visible light reflected by the second cold mirror 11 enters the collimator lens 10.

The collimator lens 10 is a lens for emitting incident light as parallel light. The parallel light emitted from the collimator lens 10 enters the first dichroic mirror 9.

The first dichroic mirror 9 reflects only the R light and the G light of the visible light at the mirror surface 9m,
It is a color separation mirror that transmits light. The R light and the G light reflected on the mirror surface 9m of the first dichroic mirror 9 enter the second dichroic mirror 7, while
The B light transmitted through the mirror surface 9m enters a B light reflecting mirror (third dichroic mirror) 8.

The B light reflecting mirror (third dichroic mirror) 8 is composed of, for example, a dichroic mirror that reflects only B light on the mirror surface 8m. This B
The B light reflected by the mirror surface 8m of the light reflection mirror 8 enters the B light steering mirror PBS6.

The second dichroic mirror 7 is
The color separation mirror reflects only the R light and transmits the G light on the mirror surface 7m. The second dichroic mirror 7
The R light reflected by the mirror surface 7m of the mirror light enters the R light steering mirror PBS4, while the mirror surface 7m
G light that has passed through m is a steering mirror for G light, PBS
5 is incident.

As described above, the first and second dichroic mirrors 9 and 7 in the case of the light source system are color separation filters for separating the light source light, which is white visible light, into R light, G light and B light. Functioning as

Steering mirror for R light, PBS4 and G
Each of the steering mirrors for the light steering mirror / PBS5 and the B light steering mirror / PBS6 is a mirror for changing the direction of the incident light flux, and in the example of FIGS. Direction).

Also, a steering mirror for R light, PBS
4 and G light steering mirror PBS5 and B light steering mirror PBS6
Only a specific polarization component is selected (extracted) from the light, the G light, and the B light. R light, G light selected by each of these PBSs,
The polarization component of the B light is reflected by a corresponding reflection-type spatial light modulator (D-ILA: Direct dri).
ve Image Light Amplifier)
Light is incident on 1, 2, and 3.

Each of the reflection type spatial light modulators 1, 2, and 3 respectively outputs R light, G light respectively incident thereon in accordance with an input image signal.
Each of the polarization components of light and B light is modulated and reflected. That is, each of the reflective spatial light modulators 1, 2, and 3 forms an image in accordance with the input image signal, and changes the polarization direction of the reflected light in accordance with the intensity of the image light. The details of each of the reflective spatial light modulators 1, 2, 3 will be described later.

The R light, G light, and B light reflected and modulated by the respective reflection type spatial light modulators 1, 2, and 3 as described above are again used for the corresponding R light. Steering mirror / PBS4 and G light steering mirror / PBS
By entering the PBS 5 and the PBS 6 of the B light steering mirror, only specific polarization components are selected (extracted).

That is, the R light steering mirror P
In each of the PBS 4 and the steering mirror for G light, the PBS 5 and the steering mirror for B light, and PBS 6, the direction of the polarization is changed by, for example, 90 degrees due to the light modulation by the reflective spatial light modulators 1, 2, and 3. The light components of the R light, G light, and B light whose azimuths have changed are transmitted to the maximum, while the light components of the R light, G light, and B light whose azimuths of the polarization have not changed are reflected in different directions. By this, each R light, G light, B light
Only a specific polarization component is selected (extracted) from the light.

The polarization component of the R light that has passed through the R light steering mirror PBS4 is reflected by the mirror surface 7m of the second dichroic mirror 7, and at the same time, the G light that has passed through the G light steering mirror PBS5. The polarization component is
The light passes through the mirror surface 7m of the second dichroic mirror 7. As a result, the combined light of the R light and the G light is emitted from the second dichroic mirror 7 toward the first dichroic mirror 9.

On the other hand, a B light steering mirror / PBS
The polarization component of the B light that has passed through 6 is reflected by the mirror surface 8m of the reflection mirror 8 and the optical path is changed to the first dichroic mirror 9.

The combined light of R light and G light emitted from the second dichroic mirror 7 passes through the first dichroic mirror 9 and at the same time, the mirror surface 8m of the reflection mirror 8
Is reflected by the mirror surface 9 m of the first dichroic mirror 9. As a result, from the first dichroic mirror 9, the combined light obtained by further combining the B light with the combined light of the R light and the G light is projected from the projection lens 1.
9 will be emitted.

As described above, the first and second dichroic mirrors 9 and 7 in the case of the projection system function as a color synthesizing filter for synthesizing light of each color decomposed into R light, G light and B light. are doing.

The projection lens 19 is a lens for emitting projection light from the projection type liquid crystal display device of the present embodiment, and enlarging and forming an image of the projection light on a projection screen (not shown). However, in the present embodiment, the anamorphic lens 20 is provided in front of the projection lens 19, and therefore, the projection light emitted from the projection lens 19 enters the anamorphic lens 20.

The anamorphic lens 20 forms a projection image having an aspect ratio different from the aspect ratio (aspect ratio) of the image (projection source image) on each of the reflection type spatial light modulators 1, 2, and 3.
It is a lens for forming on a projection screen. In the projection type liquid crystal display device of the present embodiment, the anamorphic lens 20 provided in front of the projection lens 19 has a magnification of 205.5 times in the horizontal direction and 98.94 in the vertical direction.
That is, the one that realizes an enlargement of 2.077 times in the horizontal direction is used.

Next, the reflection type spatial light modulators 1 to 3 employed in the projection type liquid crystal display device of the present embodiment will be described below.

In this embodiment, each of the reflective spatial light modulators 1 to 3 has a vertical pixel electrode of 14.7 to 14.9 μm.
m, arranged at a pitch of 7.5 to 7.7 μm in width, 1024 to 1080 pixels in the vertical direction, and 38 in the horizontal direction.
A pixel in which 40 to 4096 pixels are arranged in a matrix is used. In the following example, a case where the number of pixels of each of the reflective spatial light modulators 1 to 3 is 3940 in the horizontal direction and 1028 in the vertical direction will be described as an example.

Each of the reflection type spatial light modulation plates 1 to 3 has liquid crystal sealed between a pair of substrates.
As shown in FIG. 2, a common electrode is arranged on one of the pair of substrates, and a pixel electrode CS and a pixel electrode CS are provided on the other substrate so as to correspond to pixels individually. The connected storage element M and signal lines (lines SL1 to S1) for supplying an image signal to the storage element M
L3840) and address lines (gate lines, lines GL1 to GL1028) for selecting the storage element M are provided, and based on the charge stored in the storage element M according to the voltage of the input image signal. And a reflection type spatial light modulation plate for performing light modulation by liquid crystal.

That is, in FIG. 4, each pixel electrode C
A transistor switch TS is connected to S, and a gate line is connected to each gate of the transistor switch TS. Each gate line is connected to the corresponding switching element SW1 of the left gate circuit 27L.
Left bidirectional vertical (V) driver 2 via SW1028
6L, and to the right bidirectional vertical (V) driver 26R via the corresponding switching elements SW1 to SW1028 of the right gate circuit 27R.

The left gate circuit 27L is connected to a right
On / off switching of each of the switching elements SW1 to SW1028 is controlled by a right / left switching control signal (R / L-CTL) supplied from a left switching control signal generator. In addition, the right gate circuit 27R uses the right / left switching control signal (R / L-CTL) inverted by the NOT gate 25 to switch each switching element SW1.
ON / OFF of SW1028 is switched. Thereby, each switching element SW of the left side gate circuit 27L
For example, when the switches 1 to 1028 are turned on, the switching control is performed such that the switching elements 1 to 1028 of the right gate circuit 26R are turned off.

The left bidirectional vertical (V) driver 26L and the right bidirectional vertical driver 26R are provided with a vertical synchronizing timing signal, a vertical driving clock signal, an up-down control signal, and the like (VS) supplied from a driving signal generator (not shown).
T, VC1, VC2, U / D). With these bidirectional vertical drivers 26L and 26R,
Each gate line connected to the lines GL1 to GL1028,
That is, horizontal lines are sequentially selected.

Each signal line (lines SL1 to SL38)
40) is connected to the bidirectional horizontal (H) driver 22. The bidirectional horizontal driver 22 receives a right / left switching control signal (R / L-CTL), a horizontal synchronization timing signal and a horizontal drive clock signal (HST, HC1, HC2) supplied from a drive signal generator (not shown). The image signal (video input) from the image signal processing unit (not shown) is also driven, and is supplied to a line SL1 of each signal line.
→ Output in the order of SL3840, and use it as an input image signal to each transistor switch TS.

Thus, the bidirectional vertical driver 26L,
The charge corresponding to the input image signal is stored in the storage element M of the pixel electrode CS of the horizontal line selected by 26R.

Therefore, according to the reflective spatial light modulators 1 to 3 of the present embodiment, by repeating the above-described operation in the vertical direction, charges corresponding to the input image signal are accumulated in all the pixels in the pixel area 28. And as a result,
The aforementioned readout light is modulated.

FIG. 5 shows an example of the configuration of the bidirectional horizontal driver 22 of the reflective spatial light modulators 1 to 3 shown in FIG.

In FIG. 5, the bidirectional horizontal driver 2
2 is a bidirectional shift register 41 and a level shifter 42
And a switching element 43.

The bidirectional shift register 41 stores a right / left switching control signal (R / L-CTL), a horizontal synchronization timing signal, a horizontal drive clock signal, and the like (HST, HC).
1, HC2) are supplied.

In the configuration shown in FIG. 5, the case where the image signals (video signals VIDEO1 to VIDEO24) are multi-phased into 24 phases is taken as an example, and the vertical lines are selected in the order of 1 to 160 by the bidirectional shift register 41. The video signal VIDE multiplied through the level shifter 42
O1 to VIDEO 24 are simultaneously selected by each switching element 43.

Next, FIG. 6 shows a configuration example of the bidirectional vertical driver 26 of the reflection type spatial light modulators 1 to 3 shown in FIG. The left bidirectional vertical driver 26L and the right bidirectional vertical driver 26R have basically the same configuration. In the example of FIG. 6, the gate circuit 27 (27
L, 27R) are also shown at the same time.

In FIG. 6, bidirectional vertical driver 2
Reference numeral 6 (26L, 26R) includes an odd (ODD) bidirectional shift register 51o, an even (EVEN) bidirectional shift register 52e, and a level shifter 53.

The odd bidirectional shift register 51o has a right / left switching control signal (R / L-CTL), a vertical synchronizing timing signal for the odd, a vertical driving clock signal (VSTo, VC1o, VC2o), and an up / down operation. The control signal (U / D) is supplied, and the right / left switching control signal (R / L-CTL) and the vertical synchronization timing signal and the vertical drive clock signal for the even (VSTe) are supplied to the even bidirectional shift register 51e. ,
VC1e, VC2e) and an up / down control signal (U / D).

In the configuration shown in FIG. 6, two sets of shift registers 51 independent of each of the odd and even horizontal lines are provided.
5 shows an example in which the shift registers 51o and 51e are provided with drive clock signals (VC1o and VC2o).
o, VC1e, VC2e) are driven in-phase or out-of-phase according to the input phase of each, and each horizontal line (gate line) passes through the level shifter 53, and the gate circuit 27 (27L, 27L).
R) is selected by each of the switching elements SW1 to SW1028.

By sequentially performing the above operation in accordance with the horizontal synchronization timing signal of the input image signal, it becomes possible to input a corresponding signal to all the pixels in the pixel area 28 as described above.

Here, in the projection type liquid crystal display device of the present embodiment, as described above, as the reflection type spatial light modulators 1 to 3, each pixel electrode CS has a length of 14.7 to 14.9 μm,
As shown in FIG. 7, pixels are arranged at a pitch of 7.5 to 7.7 μm in the horizontal direction, and 1024 to 1080 pixels in the vertical direction and 3840 to 4096 pixels in the horizontal direction.
As shown in the middle part (b), one having a diagonal of 1.3 inches and an aspect ratio of about 16: 9 is used.

In the projection type liquid crystal display device according to the present embodiment, as shown in FIG.
As an upper display size, an image having a diagonal of 243.5 inches and an aspect ratio of about 4: 1 is projected and displayed.

Furthermore, in the projection type liquid crystal display device of the present embodiment, as described above, the anamorphic lens 20 provided in front of the projection lens 19 has an enlargement factor of 205.5 times in the horizontal direction and 205.5 times in the vertical direction. 98.94 times,
In the horizontal direction, one that realizes 2.077 times magnification is used.

As described above, according to the projection type liquid crystal display device of the present embodiment, the anamorphic lens 20 having the magnification is attached to the front of the projection lens 19 shown in FIG. It is possible to project and display an image having a substantially square pixel and an aspect ratio of about 4: 1.

That is, in the projection type liquid crystal display device of the present embodiment, as shown in FIG. 7B, each pixel electrode CS has a length of 14.7 to 14.9 μm and a width of 7.5 to 7.5. It is arranged at a pitch of 7 μm, and 102
Aspect ratio: 4 to 1080 pixels, 3840 to 4096 pixels in the horizontal direction arranged in a matrix
Is about 16: 9, the images obtained by the reflective spatial light modulators 1 to 3 are enlarged by 205.5 times in the horizontal direction and 9 times in the vertical direction.
By passing the anamorphic lens 20 of 8.94 times (2.077 times in the horizontal direction) through the projection lens 19 provided in the front part, as shown in FIG.
This makes it possible to project and display on the projection screen 60 an image full of a sense of realism of 43.5 inches and having a substantially square pixel and an aspect ratio of about 4: 1.

As is clear from the above description, according to the projection-type liquid crystal display device of the present embodiment, the aspect ratio of the projection source image and the aspect ratio of the projection image on the projection screen (aspect ratio). Ratio), it is possible to enlarge and display a high-resolution, high-quality and realistic image having substantially square pixels with a desired aspect ratio on the projection screen. .

The description of the above embodiment is an example of the present invention, and the present invention is not limited to the above embodiment. For example, as a display means of the projection source image,
A transmissive spatial light modulator may be used instead of the reflective spatial light modulator. In this case, the light source system is disposed on the back side of the transmission type spatial light modulator, and the light transmitted through the transmission type spatial light modulator enters the projection system. In addition, a liquid crystal member (reflection type spatial light modulation plates 1 to 3) is used, but a liquid crystal member provided with a reflection type liquid crystal light valve on a display surface of a cathode ray tube (CRT) may be used. . In addition, it goes without saying that various changes can be made according to the design and the like within a range not departing from the technical idea according to the present invention.

[0075]

According to the first aspect of the present invention, there is provided a projection type display apparatus in which an aspect ratio of an original image is different from an aspect ratio of an image projected on a display means. , A high-resolution image can be displayed.

The projection type display device according to the second aspect of the present invention can display a more realistic image by increasing the ratio of the image displayed on the display means in the horizontal direction.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an overall optical system of a projection type liquid crystal display device according to an embodiment to which a projection type display device according to the present invention is applied.

FIG. 2 is a diagram used for explaining a light source system among optical systems of the projection type liquid crystal display device of the embodiment.

FIG. 3 is a diagram used for describing a projection system among optical systems of the projection type liquid crystal display device of the embodiment.

FIG. 4 is a block diagram showing an overall configuration of a reflective spatial light modulator employed in the projection type liquid crystal display device of the embodiment.

FIG. 5 is a block diagram showing a configuration example of a bidirectional horizontal driver of a reflective spatial light modulator used in the projection type liquid crystal display device of the embodiment.

FIG. 6 is a block diagram showing a configuration example of a bidirectional vertical driver of a reflective spatial light modulator used in the projection type liquid crystal display device of the embodiment.

FIG. 7 shows an image size on a projection screen on which an image is projected by the projection type liquid crystal display device of the embodiment, and a pixel area of a reflective spatial light modulator used in the projection type liquid crystal display device of the embodiment of the invention. FIG. 4 is a diagram used to explain the size of an image and the magnification of an image.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reflective spatial light modulator for R, 2 ... Reflective spatial light modulator for G, 3 ... Reflective spatial light modulator for B, 4 ... Steering mirror / PBS for R light, 5 ... Steering mirror for G light・ PBS 、 6 ・ ・ ・ B light steering mirror ・ PBS 、 7
... 2nd dichroic mirror, 7m ... Mirror surface of 2nd dichroic mirror, 8 ... Reflection mirror (third dichroic mirror), 8m ... Mirror surface of reflection mirror, 9
... First dichroic mirror, 9 m... Mirror surface of first dichroic mirror, 10.
DESCRIPTION OF SYMBOLS 1 ... 2nd cold mirror, 12 ... 2nd integrator, 13 ... 1st integrator, 14 ... UV filter, 15 ... 2nd condenser lens, 16 ... 1st cold mirror, 17 ... 1st condenser lens , 18: light source lamp, 19: projection lens, 20: anamorphic lens, 22: bidirectional horizontal (H) driver, 25: knot gate, 26L: left bidirectional vertical (V) driver, 26
R: right bidirectional vertical driver, 27L: left gate circuit, 27R: right gate circuit, 28: pixel area, 41
... bidirectional shift register, 42 ... level shifter, 43 ...
Switching element, 51o: bidirectional shift register for odd, 51e: bidirectional shift register for even, 53
... Level shifter, 60 projection screen, CS pixel electrode, M storage element, TS transistor switch, SW
1 to SW1028: Switching element

Claims (2)

[Claims] 1. A light source that emits predetermined light, and is driven by at least the same amount of image information as the original image information, and reflects light from the light source to correspond to the driven image information. A reflection-type light modulation unit that forms image light, and optically converts image light having a predetermined aspect ratio from the reflection-type light modulation unit into image light having an aspect ratio different from at least the aspect ratio of the image light. And a projection means for projecting the light onto the display means. 2. An aspect ratio of image information for driving the reflection type light modulation unit and an aspect ratio of the reflection type light modulation unit are 16: 9, respectively, and the projection unit is controlled by the reflection type light modulation unit. 2. The projection display device according to claim 1, wherein the formed image light having an aspect ratio of 16: 9 is optically converted into image light having an aspect ratio of 4: 1 and projected onto a display unit.