JP3016650B2 - LCD projector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal projector for projecting an image displayed on a transmission type liquid crystal panel.

[0002]

2. Description of the Related Art Conventionally, liquid crystal projectors are classified into a single-panel type and a three-panel type, and the former is sold at a low price and the latter as a high-end product. The single-panel system projects a figure displayed on one liquid crystal panel, and a schematic diagram of an optical system is shown in FIG. 13 for explaining a system example. FIG.
Reference numeral 1301 denotes a lamp; 1302, an internal color filter in which each pixel is divided into red, green, and blue; a color liquid crystal panel used in a liquid crystal television or the like; 1303, a projection lens; and 1304, an imaging screen. The path of light is indicated by an arrow. Referring to FIG.
Light transmitted from the liquid crystal panel 1302 is transmitted through the rear surface of the liquid crystal panel 1302, and an image displayed on the liquid crystal panel 1302 is projected on a screen 1304 by a projection lens 1303.

In the three-panel system, figures of red, blue, and green are separately displayed on three liquid crystal panels corresponding to the respective figures, and light transmitted through the liquid crystal panels of each color is projected so as to be synthesized on a screen. A schematic diagram of an optical system is shown in FIG. 14 for explanation of an example of a three-plate system. In FIG. 14, reference numeral 1401 denotes a lamp having a reflecting mirror capable of emitting parallel light, 1402 denotes a dichroic mirror that reflects blue and transmits green and red components, 1403 denotes a dichroic mirror that reflects red and transmits green, and 1404 and 1405 denote dichroic mirrors. A reflecting mirror for bending the optical path at a right angle, 1406 is a dichroic mirror that transmits blue and reflects red, 1407 is a dichroic mirror that transmits blue and red and reflects green, 1408 is a liquid crystal panel that displays blue figures, 1409 Is a liquid crystal panel that displays a red figure, 1410 is a liquid crystal panel that displays a green figure, 14
Reference numeral 11 denotes a projection lens, and reference numeral 1412 denotes a screen. The path of light is indicated by an arrow, and the amount of light from the lamp 1401 to the projection lens 1411 is represented by a thickness for convenience. In FIG. 14, the parallel light emitted from the lamp 1401 is blue by two dichroic mirrors 1402 and 1403,
The light is divided into three components of red and green, and each light beam passes through the back of the corresponding liquid crystal panel 1408, 1409, 1410 to obtain graphic information, and then the dichroic mirror 140
At 6 and 1407, the light is recombined so as to have three primary color components, and is projected on the screen 1412 by the projection lens 1411.

[0004]

However, in a single-panel color liquid crystal projector, the electrodes of each pixel are divided into three parts, and red, blue and green color filters are stacked and arranged. 3, and the transmittance is reduced by about 2/3 by only the absorption by the color filter substrate. Therefore, if a color filter is provided in the liquid crystal panel, the transmittance becomes 2/9. Furthermore, when the loss of the polarizing plate and the glass is multiplied, the transmittance of the entire liquid crystal panel becomes several percent, and there is a disadvantage that the projected image becomes dark.

In a single-panel type liquid crystal projector, since the spectrum of incident light covers the entire visible light, characteristics of a liquid crystal material having wavelength dependence are set so that it can be used in a wide band, so that response speed and contrast are limited. However, there is a disadvantage that the image quality is deteriorated.

Although the three-panel type liquid crystal projector does not have a color filter as compared with the single-panel type, the light use efficiency is improved. However, in order to match the figures of each panel on the screen, the vertical and horizontal directions of each panel are required. It is necessary to adjust the twist and tilt of the optical axis, the distance to the lens for focusing, and the like. The same applies to the dichroic mirror and the reflecting mirror, and there is a disadvantage that an extremely large number of adjustment items are required as a whole.

In a three-panel type liquid crystal projector, since a large number of optical components are arranged between a lamp and a lens, an optical path becomes long, and high-precision parallel light is required in order to increase light use efficiency. There is also a disadvantage that it becomes.

Further, in a three-panel liquid crystal projector, as shown in an example of FIG.
The projection lens 1411 and the panels 1408, 1408, 1408, 1409, 1410 have two mirrors between them.
409, 1410 cannot approach. Therefore, there is a disadvantage that it is necessary to increase the size of the projection lens and increase the number of lenses used in order to satisfy the specifications such as high magnification required for the projection system. If a large number of optical components and adjustment are added to this, there is a disadvantage that the manufacturing unit price does not decrease.

An object of the present invention is to solve the above problems,
An object of the present invention is to provide a liquid crystal projector capable of performing bright and high quality projection with simple adjustment and optical components.

[0010]

In order to achieve the above object, the present invention separates a first component light having a spectrum for one color and a second component light having a spectrum for two colors among three primary colors of light. A first optical filter, a first liquid crystal panel that receives light of the first component and displays an image corresponding to the color, and has a two-color filter, and receives two-component light and receives two-color light. A second liquid crystal panel for performing display and a second optical filter for recombining the first and second component lights transmitted through the first and second liquid crystal panels are provided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing the arrangement of the optical components and the liquid crystal panel of the first embodiment, where 101 is a halogen lamp used as a light source, 102 is used as a first optical filter, and is blue as a first component to be separated. Dichroic mirror that reflects red light and transmits red and green as the second component, 103 is a reflecting mirror that bends blue light at right angles, 104 is a reflecting mirror that bends red and green light at right angles, and 105 is blue light that transmits. The first liquid crystal panel 106 displays the blue component of the graphic to be obtained on the screen, and the red and green light is transmitted therethrough and laminated with the liquid crystal layer, and the red and green color filters are arranged, and the A second liquid crystal panel 107 for performing color display of two color components of red and green of a figure to be obtained is used as a second optical filter, and reflects blue light transmitted through the first liquid crystal panel. Through the second LCD panel A dichroic mirror for recombining the three primary colors of red, blue and green light from being transmitted through the red and green light that has been, 108 at the projection lens, showing the path of light by the arrow.

FIG. 2 is an explanatory diagram showing the structure of the liquid crystal panel used in the first embodiment and the pixels displayed on the screen. FIG. 2A shows the liquid crystal panel 105 for blue in FIG. , 201 are pixels selected for explanation. (B) shows the liquid crystal panel 106 for red and green in FIG.
Is a pixel overlapping the blue pixel 201 on the screen.
(C) is an enlarged view of the periphery of the pixel 201,
04 and 205 are signal electrodes, 206, 207 and 208 are scanning electrodes, and the pixel 201 is a signal electrode 204 and a scanning electrode 20.
7 and are indicated by thick lines in the figure.
(D) is an enlarged view of the periphery of the pixel 202,
Reference numerals 10 and 211 denote red signal electrodes laminated on the red color filter, which are indicated by diagonally lower left diagonal lines.
Reference numerals 2, 213 and 214 denote green signal electrodes laminated on the green color filter and are indicated by oblique lines falling to the right. 215, 216 and 217 are scanning electrodes,
Is formed at the intersection of the red signal electrode 210, the green signal electrode 213, and the scanning electrode 216, and is indicated by a thick line in the figure. (E) is a cross-sectional view of a main part of the periphery of the pixel 201 in the horizontal direction, where 218 is an upper glass of the liquid crystal panel, 219 is a lower glass of the liquid crystal panel, and the liquid crystal layer 220 is between the scanning electrode and the signal electrode. (F) is a cross-sectional view of a main part of the periphery of the pixel 202 in the horizontal direction, where 221 is the upper glass of the liquid crystal panel,
23 and 224 are signal electrodes 209, 210 and 21 respectively.
Red filters 225, 22 stacked below 1
6, 227 are green filters laminated below the signal electrodes 212, 213, 214, 228 is a lower glass of a liquid crystal panel, and 229 is a liquid crystal. (G) is a schematic diagram showing the color distribution when the pixels 201 and 202 are superimposed on the screen to form a pixel having three primary color components. Red and blue are added on the left and green and blue are added on the right. This indicates that they are mixed.

In the first embodiment, a halogen lamp is used as a light source, and blue and blue and red and green are selected as the first and second components of the separated light, respectively. The reason will be described with reference to FIG. FIG. 3 is a graph showing the spectral characteristics of the halogen lamp and the recombined light, where the vertical axis 301 is the intensity, the horizontal axis 302 is the reciprocal of the wavelength,
04 and 305 are red, green and blue spectral regions, respectively.
Reference numeral 306 denotes a spectral curve of a halogen lamp, and 307 denotes a spectral characteristic of recombined light. For the sake of explanation, light attenuation by a liquid crystal panel is limited to only a polarizing plate and a color filter. In FIG. 3, the spectral characteristic 306 of the halogen lamp has a large amount of red component and a small amount of blue, and therefore, when a white figure is projected by a slide projector or the like, the screen becomes yellowish on the screen. In the first embodiment of FIG. 1, the blue component is only attenuated by a factor of two with the polarizer of the liquid crystal panel only.
become. When these two components are recombined, the spectral curve 307 shown in FIG. 3 is obtained, and the blue balance is enhanced, so that the white balance of the projected image is improved. In general, as compared to a single-panel type liquid crystal projector, assuming that the spectral characteristics of the light source are flat, the transmittance of blue is three times and that of red and green is 1.5 times. Thus, the total transmitted light intensity is approximately doubled, and a bright projection display is possible.

FIG. 4 is a schematic view of the optical system of the second embodiment. In FIG. 4, reference numeral 401 denotes a metal halide lamp;
2 is a dichroic mirror that reflects red and transmits green and blue, 403 and 404 are reflecting mirrors, 405 is a first liquid crystal panel that displays red figures, and 406 is a second liquid crystal panel that includes green and blue color filters. A liquid crystal panel, 407 is a dichroic mirror that reflects red and transmits green and blue, and 408 is a projection lens. Since the metal halide lamp has weak red and strong blue due to spectral characteristics, the optical system shown in FIG. 4 passes red through a path with little attenuation, unlike the first embodiment shown in FIG. 1, and has a color filter for blue. Therefore, it passed through the path where the attenuation increased.

FIG. 5 is a schematic view of an optical system according to a third embodiment. In FIG. 5, the same numbers as those in FIG.
A dichroic mirror 01 reflects blue and transmits red and green. In the first embodiment shown in FIG. 1, dichroic mirrors 102 and 10 used as first and second optical filters are used.
7 is separated, but as an optical function, both reflect blue and transmit red and green, so that a single sheet can be formed as shown in FIG. In FIG. 4 as well, it is possible to reduce the number of dichroic mirrors to one, and the parallelism between the two dichroic mirrors and the fine adjustment of the angle are not required, thereby facilitating the adjustment.

FIG. 6 is a schematic view of an optical system according to a fourth embodiment. In FIG. 6, the same numbers as those in FIG.
01 is a glass, 602 is a dichroic mirror formed in the upper half area of the glass 601 and reflects blue and transmits red and green, and 603 is formed in the lower half area of the glass 601 and reflects red and green and transmits blue. In this dichroic mirror, the position of the lens 108 is different from that of the first embodiment shown in FIG. In FIG. 6, the dichroic mirror 602 is formed on the upper surface of the glass 601 so that the dichroic mirror 602 is not affected by the refraction of the glass 601 when blue is reflected by the dichroic mirror 602. 601.

FIG. 7 is an enlarged view of the pixel portion of the second liquid crystal panel of the fifth embodiment. 7, reference numerals 701 and 702 denote signal electrodes formed on a red color filter.
3, 704 are signal electrodes formed on the green signal electrode, 7
Reference numerals 05 and 706 denote scanning electrodes, which differ from the first embodiment in that the thickness of the color filter signal electrodes 703, 704, 705 and 706 is made non-uniform. In the fifth embodiment of FIG. 7, the green color filter is made thicker when red is stronger than green in a long-life halogen lamp or the like, while the color balance is achieved by making the red color filter thinner.
By combining the strong influence of green on luminosity with respect to lightness, the projected image can be apparently felt bright.

FIG. 8 is a schematic diagram showing an optical system of a sixth embodiment. In FIG. 8, the same reference numerals as those in FIG. 1 denote the same members, and reference numeral 801 denotes a guest-host type STN liquid crystal panel containing a blue pigment used as the first liquid crystal panel.
When the transmittance is highest during driving (hereinafter referred to as ON), the blue transmittance hardly decreases even if a blue pigment is added to the liquid crystal of the STN liquid crystal panel, but when the transmittance is lowest during driving (hereinafter referred to as ON). (Referred to as “off”), the dye absorbs blue, so that the blue panel increases the contrast while maintaining the brightness at the time of on, leading to an improvement in image quality.

FIG. 9 is a schematic diagram showing the optical system of the seventh embodiment. 9, the same reference numerals as in FIG. 1 denote the same members, and 901 denotes a yellow mode STN liquid crystal panel used as a second liquid crystal panel. The yellow mode has a property that the color is changed from yellow on to dark blue to off, but since the color correction is not performed, the entire panel can display a bright image with little light loss. In the system of the seventh embodiment, since the light incident on the second liquid crystal panel in the yellow mode has only red and green components, for example, when both red and green are turned on, the pixel becomes yellow by additive mixing. When both are off, there is no blue component, so that the color is black. As a result, a bright and high-contrast projected image can be obtained because of little loss of light. Similar effects can be obtained by using a Blue Mod STN liquid crystal panel for the second liquid crystal panel of the present embodiment. In the blue mode, white is turned on and blue is turned off in the blue mode. However, in the system for separating light according to the present embodiment, light transmitted through the second liquid crystal panel has no blue component. Can be displayed.

FIGS. 10A and 10B show the color filter structure of the eighth embodiment. FIG. 10A is a plan view of a color filter in which several pixels are enlarged, and FIG. 10B is a sectional view of a main part of FIG. FIG.
In the figure, 1001 indicated by a downward-sloping oblique line is a green-colored area, 1002 indicated by a downward-sloping diagonal line is a red-colored area, 1003 is a black matrix at the boundary between the green and red areas, and 1004 is a black matrix. Glass with color filters. In FIG. 10A, red area 1
002 and the green area are arranged one by one, and one red area 1002 and one green area 1001 constitute one pixel. In FIG. 10B, the green area 1001 protrudes at the boundary, and the red area 1002 and the green area 10
This indicates that the light is superimposed on 01, and transmitted light having red and green components is both absorbed, so that the boundary is black matrixed. Since a single-panel type color liquid crystal projector panel has three colored regions, simply overlapping the boundaries can absorb only two colors and transmit the remaining one color, so that a high-performance black matrix cannot be obtained. In the present embodiment, since such a problem is solved in the optical system, a high-performance black matrix can be formed. Further, in order to form a black matrix, a dye may be mixed at a boundary portion in addition to the superposition. In the first embodiment, the color filters were continuous in the vertical direction (referred to as vertical stripes). However, if a black matrix was formed with this type of color filter, light would leak from between the scanning electrodes, resulting in poor performance. descend.

FIG. 11 is an enlarged view of the signal electrode of the first liquid crystal panel of the ninth embodiment. In FIG. 11, 1101,
Reference numerals 1102, 1103, and 1104 denote signal electrodes. The pitch of the signal electrodes is the same as the pitch of the signal electrodes of the second liquid crystal panel. When high-resolution display is performed on a television screen or the like, the color filter of FIG. 10 is used for the second liquid crystal panel, the first liquid crystal panel for blue has the signal electrode structure of FIG. 11, and one pixel is green and blue. Or a unit of red and blue, and a red, green and blue color image signal is sampled. Even in this case, the image signal has a strong correlation, and if the light intensity of red, green, and blue is balanced, image degradation caused by illegal sampling ignoring one color component is not so noticeable, and the number of pixels is doubled. As a result, the effect that high-definition display has become possible appears greatly.

FIGS. 12A and 12B are schematic diagrams of an optical system according to the tenth embodiment, and FIG. 12B is a schematic diagram of the optical system according to the eleventh embodiment. In FIG. 12, 1
201 and 1216 are lamps, 1202 and 1215 are dichroic mirrors used as first optical filters,
1203, 1208, 1209 and 1210 are reflecting mirrors,
204, 1207, 1211 and 1214 are liquid crystal panels,
1205 and 1212 are projection lenses, 1206 and 1213
Is a dichroic mirror used as a second optical filter, and (A) is a lamp 1201 and a projection lens 120.
5 (B) is an example in which the lamp 1216 and the projection lens 1212 are linearly arranged. FIG.
In (A), whether one of the liquid crystal panels 1204 and 1207 corresponds to the first liquid crystal panel transmitting one color component and the other corresponds to the second liquid crystal panel transmitting two color components depends on the characteristics of the dichroic mirror 1202. Is determined by (B) is the same, and the arrangement of the first and second liquid crystal panels can be reversed even if the arrangement of the first embodiment of FIG. 1 or the fourth embodiment of FIG. 6 is changed by changing the characteristics of the dichroic mirror.

When an active matrix type panel is used in the present invention, a liquid crystal projector having a high contrast and a high response speed can be obtained. Further, since the dispersion type liquid crystal panel does not require a polarizing plate, the projected image can be brightened. When a liquid crystal panel is made of a ferroelectric liquid crystal, since it has a memory property, there is no limit to a driving frequency such as data transfer and a selection pulse width, and high-definition projection can be performed.

As an optical filter using light interference,
There is a dichroic prism besides the dichroic mirror. When a light source that generates three primary colors of light in a line spectrum, such as a three-wavelength fluorescent lamp, is used, a diffraction grating can be used to separate light. When a color filter utilizing interference is used, the loss of light can be reduced and the projected image can be brightened as compared with the color filter of the color type used in the embodiment of the present invention. If the optical system is divided into one color component and two color components when the light is separated by the first optical filter in the polarization direction and then the one-color component and the two-color component are used, the loss of light can be reduced because the polarizing plate on the incident side can be omitted. It can be easily inferred from the present invention that the first optical filter can be omitted by preparing a light source of one color component and a light source of two color components.

[0025]

The liquid crystal projector according to the present invention separates light into a first component and a second component, and since the first component is not attenuated by a color filter, it is three times brighter than the same color in a single-panel system. In the second component, since the color filter has two colors and there is no region corresponding to the color of the first component, the two colors have a transmission amount 1.5 times that of the single-plate system. As a result, about twice the brightness can be obtained as compared with the single plate system.

In addition, since a light component having a weak point due to the characteristics of the light source and the liquid crystal panel can be assigned to the first component and subjected to strong correction, the brightness, the color balance, the contrast, and the like are improved, and a high-quality image can be obtained.

Further, compared with the three-plate system, the distance from the light source to the lens can be reduced, so that high-precision parallel light is not required. Simplify. Also, since the distance between the panel and the lens can be made closer than in the three-plate system, a lens with a high magnification can be simplified. In this way, the specifications for optical components are reduced.

In contrast to the three-panel system, one liquid crystal panel
Since the number of optical filters is reduced by two, peripheral components such as fixtures are reduced accordingly. In addition, since the required optical precision is reduced, adjustment parts and the like are simplified, and the number of parts is greatly reduced.

In the present invention, one liquid crystal panel only needs to be adjusted to the remaining liquid crystal panels, so that the adjustment items required for pixel alignment are halved compared to the three-panel method. Further, since the optical path is short, it is not necessary to increase the accuracy of the mounting angle of the reflecting mirror. Further, since the lens and the liquid crystal panel are close to each other, the depth of focus of the lens can be made deep and the focus adjustment can be easily performed. Thus, the adjustment can be greatly simplified.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an arrangement of an optical component and a liquid crystal panel according to a first embodiment of the present invention.

FIGS. 2A and 2B are explanatory views of a liquid crystal panel according to a first embodiment of the present invention and pixels displayed on a screen. FIG. 2A is a plan view of a liquid crystal panel for blue, and FIG. Plan view (C) is an enlarged view around the pixel of the panel of (A). (D) is an enlarged view of the periphery of the pixel of the panel of (B). (E) is a sectional view of a main part of (C). (G) is a schematic diagram of a pixel projected on a screen.

FIG. 3 is a graph showing the spectral characteristics of a light source and recombined light according to the first embodiment of the present invention.

FIG. 4 is a schematic view of an optical system according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram of an optical system according to a third embodiment of the present invention.

FIG. 6 is a schematic view of an optical system according to a fourth embodiment of the present invention.

FIG. 7 is an enlarged view of a pixel of a second liquid crystal panel according to a fifth embodiment of the present invention.

FIG. 8 is a schematic diagram of an optical system according to a sixth embodiment of the present invention.

FIG. 9 is a schematic diagram of an optical system according to a seventh embodiment of the present invention.

10A and 10B are explanatory diagrams of a color filter structure according to an eighth embodiment, in which FIG. 10A is a plan view in which several pixels are enlarged, and FIG. 10B is a cross-sectional view of a main part of FIG.

FIG. 11 is an enlarged plan view of a signal electrode of a first liquid crystal panel according to a ninth embodiment of the present invention.

12A and 12B are schematic diagrams of an optical system according to a tenth embodiment and an eleventh embodiment of the present invention. FIG. 12A is a tenth embodiment, and FIG. 12B is an eleventh embodiment.

FIG. 13 is a schematic diagram of an optical system of a single-panel type liquid crystal projector as a conventional example.

FIG. 14 is a schematic diagram of an optical system of a three-panel type liquid crystal projector as a conventional example.

[Explanation of symbols]

101 Halogen lamp used as light source 102 Dichroic mirror used as first optical filter 103 Reflecting mirror 104 Reflecting mirror 105 First liquid crystal panel 106 Second liquid crystal panel 107 Dichroic mirror used as second optical filter 108 Projection lens 209, 210, 211 Red filter 212, 213, 214 Green filter 306 Spectral curve of halogen lamp 307 Spectral curve of recombined light 401 Metal halide lamp used as light source 402 Dichroic mirror 405 First liquid crystal panel 406 Second liquid crystal panel 407 Dichroic mirror 501 Dichroic mirror 601 Glass 602 Dichroic mirror 603 Dichroic mirror 701, 702 Signal electrode 703 on red filter 704 green filter on the signal electrode 801 guest host STN panels 901 yellow mode STN panel 1001 green colored regions 1002 red colored regions 1003 black matrix 1101,1102,1103,1104 signal electrodes

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-261933 (JP, A) JP-A-63-15220 (JP, A) JP-A-63-15219 (JP, A) JP-A-62-1 264088 (JP, A) JP-A-62-143087 (JP, A) JP-A-62-42182 (JP, A) JP-A-60-205526 (JP, A) JP-A-63-306792 (JP, A) JP-A-4-207773 (JP, A) JP-A-4-106539 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1335 530 G02F 1/13 505

Claims (4)

(57) [Claims] 1. A liquid crystal projector for transmitting light emitted from a light source to a liquid crystal panel and projecting an image displayed on the liquid crystal panel, comprising: a first component light having a spectrum corresponding to one of three primary colors of light; A first optical filter that separates into second component light having a spectrum for two colors,
A first liquid crystal panel that receives the first component light and displays an image corresponding to the color of the component light, and a surface of each color in a pixel portion
A second liquid crystal panel having a two-color filter having a non-uniform product , performing the two-color display by entering the second component light, and the first liquid crystal panel having transmitted through the first and second liquid crystal panels. A liquid crystal projector comprising a second optical filter that recombines the second component light. 2. Light transmitted from a light source is transmitted to a liquid crystal panel.
To project the image displayed on the liquid crystal panel.
One of the three primary colors of light
Component light with two minute spectra and two color spectra
A first optical filter that separates into a second component light having
An image corresponding to the color of the component light is incident upon the first component light.
This is a liquid crystal panel that displays, and a guest that incorporates a blue dye.
A first liquid crystal panel which is a host STN liquid crystal panel;
A color filter for receiving the second component light,
A second liquid crystal panel for performing color display, the first and second liquid crystal panels;
The first and second component lights transmitted through the second liquid crystal panel are
A second optical filter to be synthesized.
The liquid crystal projector that. 3. Light transmitted from a light source is transmitted to a liquid crystal panel.
To project the image displayed on the liquid crystal panel.
One of the three primary colors of light
Component light with two minute spectra and two color spectra
A first optical filter that separates into a second component light having
An image corresponding to the color of the component light is incident upon the first component light.
The first LCD panel to display and the two-color filter
A liquid having a two-color display by receiving the second component light
Crystal STN LCD panel
Is a second liquid crystal panel which is a blue mode liquid crystal panel,
The first and second have been transmitted through the first and second liquid crystal panels
Equipped with a second optical filter that recombines
And a liquid crystal projector. 4. Light transmitted from a light source is transmitted to a liquid crystal panel.
To project the image displayed on the liquid crystal panel.
One of the three primary colors of light
Component light with two minute spectra and two color spectra
A first optical filter that separates into a second component light having
An image corresponding to the color of the component light is incident upon the first component light.
If the first LCD panel to be displayed and the border between the two colors are mixed,
Black that blocks the second component light by superposition
Having a two-color filter having a matrix,
The second liquid crystal panel that receives the second component light and performs two-color display
And the second through the first and second liquid crystal panels.
A second optical filter that recombines the first and second component light
A liquid crystal projector, comprising: