JPH03284791A - Display panel and its driving method and video projector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid crystal display panel and a video projector using the liquid crystal display panel.

BACKGROUND OF THE INVENTION Active matrix liquid crystal display panels have been actively researched and developed because they are capable of displaying high resolution.

However, since the liquid crystal display panel requires the use of a semiconductor process, it is difficult to manufacture a large-area panel. Therefore, a video projector (hereinafter referred to as
Liquid crystal video projectors (referred to as liquid crystal video projectors) are being developed. Although a larger screen has been achieved by enlarging and projecting the screen of a liquid crystal display panel in this way, when displaying a moving image, the image is blurred and the image quality is considerably lower than that of a CRT. This is mainly due to the slow response time of the liquid crystal.

A conventional display panel will be described below with reference to the drawings. In the following drawings, parts with the same numbers have the same configuration, the same function, or similar configurations and functions. FIG. 11 is a configuration diagram of a conventional display panel. In FIG. 11, 105 is a simple matrix or active matrix type liquid crystal display panel, 102.
Reference numeral 106 denotes a polarizing plate, which is in the form of a film, a film attached to a glass substrate, or a plate. 109 is a driver control circuit that controls a drive IC for displaying images on a liquid crystal display panel;
110 is a video signal processing circuit that processes or generates a video signal to be applied to the IC. Note that 101 is a light source such as a fluorescent light, although it is not related to the structure of the display panel. The operation of the conventional display panel will be described below. first,
The polarizing plates 102 and 106 are arranged so that their polarization directions are 90 degrees to each other (hereinafter referred to as orthogonal). In other words,
The polarizing plate 102 is arranged to transmit only the vertical component of light, and the polarizing plate 106 is arranged so as to transmit only the horizontal component. The liquid crystal display panel can change the alignment state of the liquid crystal according to the applied video signal, and can modulate the vertical (horizontal) direction component of the light into the horizontal (vertical) direction component according to the strength of the video signal ( (Hereinafter, this operation will be referred to as optical rotation.) now,
The light emitted from the light source 101 transmits the vertical (horizontal) component by the polarizing plate 102 . The liquid crystal display panel 105 receives signals from the video signal processing circuit 110 and the driver control circuit 109.
The alignment state of the liquid crystal is changed by The light transmitted through the polarizing plate 102 enters the liquid crystal display panel 105 and is rotated according to the alignment state of the liquid crystal. The polarizing plate 106 transmits the horizontal (vertical) component of the optically rotated light. Therefore, A
If you look at the liquid crystal display panel 105 from the point, you will recognize that an image is being displayed.

Next, a conventional method for driving a liquid crystal display panel will be explained using FIGS. 12 and 13. FIG. 12 is a block diagram of a conventional display panel drive circuit. In Fig. 12, 501 is an amplifier for amplifying the video signal within a specified level range, 503 is a phase division circuit that generates positive and negative polarity video signals, and 504 outputs an AC video signal whose polarity is reflected for each frame. 505 is a source drive IC, 506 is a gate drive IC 15
07 is a driver control circuit for synchronizing and controlling the gate drive IC 506 and source drive IC 505, and 50B is a liquid crystal display panel. Also, the 13th
The figure is an explanatory diagram of a liquid crystal display panel section. Note that in FIG. 13, each signal line etc. is drawn in a fairly simplified manner. In FIG. 13, 1301 is a glass substrate, 1302 is a thin film transistor (hereinafter referred to as TPT), 1303 is an additional capacitor, 1304 is a liquid crystal, G1 to G are gate signal lines,
31 to S10 are source signal lines.

First, the gain of the video signal is adjusted by the amplifier 501 so that the video output amplitude corresponds to the electro-optical characteristics of the liquid crystal. Next, the gain-adjusted video signal is input to a phase division circuit 503, and two video signals of positive polarity and negative polarity are created. Next, the two video signals are input to an output switching circuit 504, and a video signal whose polarity is inverted for each frame is output. The reason for inverting the polarity for each frame is to prevent deterioration of the liquid crystal by applying an alternating voltage to the liquid crystal.

Next, the video signal from the output switching circuit 504 is input to the source drive IC 505, and the source drive IC
505 performs processing such as level shift and sample hold of the video signal according to control signals from the driver control circuit 507, and applies a predetermined voltage to the source signal line of the liquid crystal panel 508 in synchronization with the gate drive IC 506. . Note that the operation of the liquid crystal display panel is as follows. The gate drive IC 506 connects gate signal lines C, to C.

(m is the number of gate signal lines) sequentially T F T1302
A voltage to operate the device (hereinafter referred to as on-voltage) is applied. Source drive IC C505 is gate drive I
Source signal lines 51 to S, in synchronization with C506.

(n is the number of source signal lines) outputs a voltage to be applied to each pixel. Therefore, a voltage is applied to each pixel to make the liquid crystal transmittance to a predetermined amount every one frame, and the voltage is maintained.

In other words, the pixel is the gate signal line G.

New videos will be displayed one after another. Due to this change in the amount of transmission, the light that passes through each pixel is rotated.

Next, a conventional liquid crystal video projector will be explained. FIG. 15 is a block diagram of a conventional liquid crystal video projector. In FIG. 15, 701 is a screen, 702
is a projection lens, 703 is a metal relight lamp that is a light emitting source, 704 a, 704 b, 704 c are total reflection mirrors, 705 is an ultraviolet cut filter, 70
6a, 706b, 706c, and 706d are mirrors (hereinafter referred to as glycochromic mirrors) having a function of reflecting or transmitting light of specific wavelengths of light from the metal rewrite lamp (hereinafter referred to as color separation); 707a;

707 b and 707 c are lenses (
(hereinafter referred to as a condenser lens), 710 is a housing, 15
01 a.

1501b and 1501c are liquid crystal display panels, 1
502 is a polarizing plate. Here, for ease of explanation, the liquid crystal display panel 1501a is a panel that displays images of green pigment among the images displayed on the screen 701, and the liquid crystal display panel 1501b is a panel that displays images of red pigment. The liquid crystal display panel 1501c is a panel that produces a blue dye display. Therefore, the wavelengths transmitted and reflected by each glycochromic mirror 706a are as follows.
It reflects light with a wavelength in the green region (hereinafter referred to as G light) and transmits light with a wavelength in the blue region (hereinafter referred to as B light). Furthermore, the glycochromic mirror 706b reflects the G light and transmits the B light. Similarly, the glycochromic mirror 706c reflects G light and transmits B and R light. It is also assumed that the glycochromic mirror 706b reflects B light and transmits G and R light.

The operation of a conventional liquid crystal video projector will be explained below. The light emitted from the metal halide lamp 703 is reflected by the total reflection mirror 704a, and the direction of the light is degraded. Next, from this light, light having a wavelength in the ultraviolet region is cut by an ultraviolet cut filter 705. The light that has been cuffed with ultraviolet rays is passed through a glycochromic mirror 706a.
, 706b, the R light is separated into three wavelength regions of R, G-B light, and the R light enters a condenser lens 707b, the G light enters a condenser lens 707a, and the B light enters a condenser lens 707C. Each condenser lens condenses each light and makes it incident on the polarizing plate 1502 and the liquid crystal display panel. Each liquid crystal display panel displays images by changing the orientation of its liquid crystals and rotating light. The R-G-B light rotated in this way is transferred to the gyrochromic mirrors 706c and 706c.
06d and projected onto the screen 701 by the projection lens 702.

Problems to be Solved by the Invention However, in conventional display panels, the rise and fall of the liquid crystal is slow (that is, the response time from the time a voltage is applied until the predetermined amount of transmission is reached is about 20 to 30 msec). Therefore, when displaying a video, the screen becomes extremely blurred, resulting in an extremely unsightly image.In the case of a TN liquid crystal, the rising of the liquid crystal refers to the state in which voltage is applied to the liquid crystal and the liquid crystal molecules become untwisted. , conversely, when the liquid crystal falls, it means that the twist returns to its original state.The twist state of the liquid crystal is related to the amount of light transmitted, and in this specification, the higher the applied voltage, the more the liquid crystal twists. It is assumed that the unraveling liquid crystal transmittance, that is, the optical rotation ratio increases. An explanatory diagram of this state is shown in FIG. 14. In FIG. 14, the pixel applied voltage waveform is T F T1302 as shown in FIG. By switching the liquid crystal 13
04, and the voltage waveform is maintained for one frame. The amount of light transmitted through the liquid crystal 1304 of each pixel starts to change from the moment the pixel applied voltage changes, but it does not reach the specified value immediately, and as shown in FIG. This results in the specified amount of permeation. Therefore, during the time until the amount of transmission reaches the specified value, there is no steady state of the image, and the image becomes blurred, giving a very unpleasant feeling.

Means for Solving the Problems In order to solve the above-mentioned problems, the display panel and the driving method thereof of the present invention have a function of rotating light and a function of switching light in the light incidence part or the light output part of the liquid crystal display panel. A light operation panel having at least one of the functions is provided, and the light operation panel is operated in synchronization with a liquid crystal display panel. Moreover, the video projector of the present invention
In this case, three of the display panels described above are used.

Function The present invention uses a liquid crystal display panel and a ferroelectric liquid crystal panel as a pair, and the ferroelectric liquid crystal panel has a light on/off function.

Even when a voltage is applied to a liquid crystal, it does not immediately reach the specified amount of transmission. After applying the pixel voltage, the ferroelectric liquid crystal panel is operated to cut off light until the pixel reaches a stable state. Therefore, in a liquid crystal video projector, it is possible to cut out the emitted light in the time domain when the light is not projected onto the screen and the image is blurred until it reaches a stable state.

Example The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the display panel of the present invention. In FIG. 1, 102, 104, and 106 are polarizing plates or polarizing films. 103 a, 103
c is a glass plate, 103b is a ferroelectric liquid crystal, 103
a.

103b and 103c constitute a ferroelectric liquid crystal panel 103.

The ferroelectric liquid crystal panel 103 can take two stable states: an optically rotating state and a non-optically rotating state. 107 is a light control circuit for controlling two stable states of the ferroelectric liquid crystal panel 103; Here, for ease of explanation, it is assumed that a state in which a signal is applied to the ferroelectric liquid crystal panel 103 by the optical control circuit 107 is an optically rotating state, and a state in which no signal is applied is a non-optically rotating state. A display panel control circuit 10B controls and synchronizes the driver control circuit 109 and the light control circuit. Usually polarizing plate 104.106
The polarizing plates 102 and 10 are arranged such that the polarization directions are orthogonal to each other.
4 are arranged in parallel. For ease of explanation, the polarizing plates 102 and 104 represent the vertical component of light (hereinafter referred to as condensation), and the polarizing plate 106 represents the horizontal component of light (hereinafter referred to as enrichment).
(referred to as the tip of the machine) shall be transparent.

The operation of the embodiment will be described below. The vertical component of the light emitted from the light source 101 is transmitted by the polarizing plate 102,
The vertical component of this light is incident on the ferroelectric liquid crystal panel 103.

At this time, when the ferroelectric liquid crystal panel 103 is in a non-optical rotation state,
The aforesaid condensation passes through the ferroelectric liquid crystal panel 103 as it is. Therefore, since the polarizing plate 104 is arranged with the polarization direction parallel to the polarizing plate 102, the expansion can pass through the polarizing plate 104 as it is. Conversely, when the ferroelectric liquid crystal panel 103 is in an optically rotating state, the condensation is optically rotated and converted into an optically active state. Therefore, the tip of the plane is the polarizing plate 10
I can't pass 4. From the above, when the ferroelectric liquid crystal panel is in an optically rotating state, no light is emitted from the polarizing plate 104, but when it is in a non-optically rotating state, light passes through the polarizing plate 104. Polarizing plate 104
The light passing through is modulated by the liquid crystal display panel 105,
The light is rotated depending on the alignment state of the liquid crystal. Therefore, since the ability to recognize an image from point A is the same as in the conventional panel, a description thereof will be omitted. Note that the display panel control circuit 108
As for the operation, the optical control circuit 107 and the driver control circuit 1
The main purpose is to synchronize 09. Normally, the display on the liquid crystal display panel 105 is rewritten every frame synchronization, but the ferroelectric liquid crystal panel 103 blocks light until the display is rewritten and stabilized. Therefore, an unstable display state, that is, a state where the image is blurred, is not displayed.

A second embodiment of the display panel of the present invention will be described below. FIG. 2 is a block diagram of a second embodiment of the display panel of the present invention. The difference from the first embodiment is that there is no polarizing plate 104. Since the other configurations are the same, the explanation will be omitted.

The operation of the second embodiment of the display panel of the present invention will be described below. The light emitted from the light source 101 passes through the polarizing plate 102
This is the same as in the first embodiment up to the point where the state of condensation is changed to a state of condensation, and the state of condensation is switched directly to a passing state and a state converted to light analysis depending on the state of signal application to the ferroelectric liquid crystal panel 103. However, since the optical rotation state of a ferroelectric liquid crystal panel or the like has wavelength dependence, the optical rotation state varies somewhat. Therefore, even if the light from the ferroelectric liquid crystal panel 103 is in an optical rotation state, the light incident on the liquid crystal display panel 105 is not converted into only components for complete light analysis. From the above, in the display panel of the first embodiment, no light was emitted from the polarizing plate 106 when the ferroelectric liquid crystal panel 103 was in the optical rotation state, but in the display panel of the second embodiment, only a small amount of light was emitted. Light is emitted. However, when the display panel of the present invention is used for video projection, etc., the light source 101 is of a single color of red (R), green (G), and blue (B), so the influence of the wavelength dependence of light is avoided. In fact, no light is emitted from the polarizing plate 106, which is sufficient for practical use.

Normally, when one polarizing plate is inserted, about 20% of the light is lost, but as described above, in the display panel of the second embodiment, only one polarizing plate is inserted.
04, it is desired that the brightness be improved by 20% compared to the display panel of the first embodiment.

FIG. 3 is a configuration diagram of a display panel in a third embodiment of the present invention. The difference from FIG. 2 is that the glass plate 103c is removed, and the glass plate of the liquid crystal display panel 105 and the glass plate 103 are removed.
A ferroelectric liquid crystal panel is constructed by a. The operation is the same as the second embodiment of the invention shown in FIG.

By configuring as above, the glass substrate 103c
There is no optical loss due to reflection of light, improving optical efficiency and reducing costs. Further, in the case of FIG. 2, separate support devices are required for the liquid crystal display panel 105 and the ferroelectric liquid crystal panel 103, but one support device is sufficient and costs can be further reduced.

A fourth embodiment of the display panel of the present invention will be described below. The configuration diagram of the display panel of the fourth embodiment is the same as that in FIG. However, the glass plate 103a of the ferroelectric liquid crystal panel 103 has a structure shown in FIG. In FIG. 4, 401a to 401f are transparent electrodes formed by linearly patterning ITO, etc., and 403 is a drive IC 1.
402 is a signal line for transmitting the output voltage from the drive IC 403 to the transparent electrodes 401a to 401f. In the display panels of the first and second embodiments, the transparent electrodes were formed on the entire surface of the glass substrates 103a and 103b, but in the display device of the fourth embodiment, the transparent electrodes on at least one of the glass substrates were formed with a line. By applying a voltage to each linear transparent electrode individually, the alignment state of the liquid crystal can be changed linearly. Further, the pattern position of the linear transparent electrode is formed to have a line width so as to overlap the hatched area in FIG. 13, and the electrode is positioned so as to overlap the liquid crystal display panel 105 and the ferroelectric liquid crystal panel 103.

The operation of the display panel of the fourth embodiment will be described below with reference to FIGS. 1, 4, and 13. Here, for ease of explanation, it is assumed that when a voltage is applied to the transparent electrode 401, the alignment of the liquid crystal with respect to the transparent electrode changes, and optical rotation occurs. Therefore, the portion of the transparent electrode to which the voltage is applied is linearly black, that is, no light is emitted from the polarizing plate 106. First, the on-voltage of the TFT is applied to the gate signal line G of the liquid crystal display panel 105 in FIG. It is assumed that the state of voltage application to each liquid crystal 1304 of the TPT has deteriorated.

At the same time, the transparent electrode 40 of the ferroelectric liquid crystal panel 103 in FIG.
A voltage is applied to 1a from the drive IC. The voltage is maintained until the liquid crystal 1304 approaches the target transmittance.

Therefore, light is cut off until the liquid crystal reaches a nearly stable state. Similarly, when the on-voltage is applied to the gate signal line G2, a voltage is simultaneously applied to the transparent electrode 401b, and when the on-voltage is applied to the gate signal line G3, a voltage is simultaneously applied to the transparent electrode 401c. The operations are repeated sequentially. Further, the state of voltage application to the transparent electrode becomes a non-applied state in the order of 401a, 401b, and 401c. By the above-described operation, only a stable state of the liquid crystal is displayed at all times, so that blurring of the image when displaying a moving image is extremely reduced, and a good screen display can be obtained.

In this embodiment, a ferroelectric liquid crystal panel is used as the optical rotation or switching means, but the present invention is not limited to this, and it goes without saying that similar effects can be obtained by using, for example, PLZT.

Hereinafter, a method for driving a display panel according to the present invention will be explained. FIG. 5 is a block diagram of a display panel drive circuit according to the present invention. In FIG. 5, 502 is a signal speed conversion circuit for compressing the video signal between one frame into a time shorter than one frame time, and 511 is the ferroelectric liquid crystal panel 10.
A ferroelectric liquid crystal panel similar to 3, 510 is the panel 51
509 is a display panel control circuit for controlling synchronization between the driver control circuit 507 and the light control circuit 510, and the like. The other parts are the same as those of the conventional display panel drive circuit, so the explanation will be omitted.

The method for driving the display panel of the present invention will be explained below with reference to FIG.
This will be explained using FIGS. 6 and 13.

First, the gain of the video signal is adjusted by the amplifier 501 so that the video output amplitude corresponds to the electro-optical characteristics of the liquid crystal. Next, the gain-adjusted video signal is converted to normal double speed by a signal speed conversion circuit 502. The video signal converted to double speed is input to a phase division circuit 503, where two video signals of positive polarity and negative polarity are created.Next, the two video signals are input to an output switching circuit 504, and the polarity A video signal that is inverted is output.

The video signal is input to the source drive IC505. On the other hand, when the optical control circuit 510 detects the vertical synchronization signal of the video signal, it applies a voltage to the ferroelectric liquid crystal panel 511 for a certain period of time. That is, the orientation of the liquid crystal of the ferroelectric liquid crystal panel 511 is changed, the light is rotated, and the light emitted from the polarizing plate 106 is blocked. Usually, the fixed time is set to be longer than the time required to rewrite all the pixels of all the liquid crystal display panels of one screen. - As an example, in the scanning state, first, during 174 hours of one frame, gate signals G, →G, →G5 → G7
, and rewrite the odd-numbered pixels, and reversely change the gate signal line G6 → G4 → Gt during 1/4 time of the next frame.
and rewrite even-numbered pixels. During this time, the ferroelectric liquid crystal panel blocks light.

After rewriting all pixels as described above, the light control circuit 510 stops applying voltage to the ferroelectric liquid crystal panel 511, and an image is displayed for the next 1/2 hour.

FIG. 6 shows the above state for one pixel. Since the liquid crystal has a response time, even if the pixel applied voltage waveform changes as shown in FIG. 6(a) for each frame, the pixel transmission amount does not change as shown in FIG. 6 et al.

Therefore, as shown in FIG. 6(C), by turning on and off the voltage applied to the ferroelectric liquid crystal panel, the light is cut off and the light is not emitted in an unstable state. Therefore, the amount of emitted light becomes pulsed and stable as shown in FIG. 6(d). Note that the reason why the gate signal line is scanned as described above is to make the voltage application to each pixel of the display panel uniform as a whole.

Therefore, the scanning direction is first gate signal lines G, →G, →
G, →, and then the gate signal 1vIG, →G4→, but when the screen of the liquid crystal display panel 50B can be rewritten in at least 1/2 frame time, and when the display panel is in the fourth When the display panel of the embodiment is configured, the gate signal lines G1→G2→G,
It is clear that the same effect can be achieved by scanning with →G4.

Therefore, the scanning method is not a limiting factor.

The liquid crystal video projector of the present invention will be explained below. FIG. 7 is a block diagram of a first embodiment of the liquid crystal video projector of the present invention. In Figure 7, 708
a, 708b, and 708c are polarizing plates and liquid crystal display panels, specifically shown in FIG. 8(a).

In addition, 709 is a polarizing plate and a ferroelectric liquid crystal panel,
Specifically, it is shown in FIG. 8(b). In addition, in FIG. 8, 80L 803 is a polarizing plate, 802 is a liquid crystal display panel,
804 is a ferroelectric liquid crystal panel. The operation of the liquid crystal video projector of this embodiment will be explained below. The light emitted from the metal halide lamp 703 is reflected by a total reflection mirror 704a, and the direction of the light changes. Next, from this light, light having a wavelength in the ultraviolet region is cut by an ultraviolet cut filter 705. The light that has been cut in the ultraviolet region is passed through dichroic mink mirrors 706 a and 706
b is separated into three wavelength regions of R-G and B light,
The R light is input to the condenser lens 707b, the G light is input to the condenser lens 707a, and the B light is input to the condenser lens 707C. Each condenser lens condenses each light and makes each light incident on the polarizing plate 801. In addition, the polarizing plates 801, 80
It is assumed that the planes of polarization of 3 and 3 are perpendicular to each other. Polarizing plate 8
The light incident on 01 passes through condensation (analysis) and enters each of the three liquid crystal panels 802. Each liquid crystal panel receives signals from a video signal processing circuit 110 and a driver control circuit 109.
This modulates the light by changing the alignment state of the liquid crystal in the pixel.

At the same time, the light control circuit 107 turns on and off the ferroelectric liquid crystal panel to switch light. In addition, the liquid crystal display panel 8
02 and the method of driving the ferroelectric liquid crystal panel 804 are the driving methods of the present invention.

Therefore, the R.G-
B light is dichromic mirror 706c, 706
d, and the unstable state of the liquid crystal is cut by the ferroelectric liquid crystal panel 804, and the projection lens 702
The image is projected onto the screen 701.

Other embodiments of the liquid crystal video projector of the present invention will be described below. FIG. 9 is a block diagram of another embodiment of the liquid crystal video projector of the present invention. In Fig. 9, 901a, 901b, and 901c are polarizing plates.
These are a liquid crystal display panel and a ferroelectric liquid crystal panel, which are specifically shown in FIG. In addition, in Fig. 10, 100
1.1002.1003 are polarizing plates, 1004 is a ferroelectric liquid crystal panel, and 1005 is a liquid crystal display panel. In addition,
The operation of the display device shown in FIG. 10 is basically the same as the operation of the display device of the first embodiment of the present invention. Furthermore, the flow of light emitted from the metal halide lamp 703 is the same as that in the first embodiment of the liquid crystal video projector described above, so a description thereof will be omitted. The difference from the first embodiment of the liquid crystal video projector described above is that the RGB
The key point is that the on/off time of each ferroelectric liquid crystal panel that responds to light can be controlled individually. For example, by lengthening the on time of a ferroelectric liquid crystal panel corresponding to R light, the R light can be apparently reduced. Normally, the light emitted from the metal halide lamp 703 varies from lamp to lamp, and the intensity of the light does not perfectly match R:G:B=3:6:1. Therefore, when the RGB lights are combined, it is necessary to adjust the white balance for each lamp. Further, the white balance of the lamp may shift due to aging.

In the second embodiment of the liquid crystal video projector, R-G.
The intensity of B can be varied by individually controlling the on/off time of the ferroelectric liquid crystal panel. Therefore, white balance adjustment is extremely easy.

Effects of the Invention As is clear from the above explanation, by using the display panel and its driving method of the present invention, it is possible to eliminate image blurring caused by the slow response time of the liquid crystal, and it is possible to reduce the blurring caused by the slow response time of the liquid crystal. You can get good images even if you use it.

Furthermore, by using the display device of the present invention in a liquid crystal video projector, it is possible to display a large screen and a good image, and the white balance can be adjusted extremely easily, which has great industrial value. be.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a first embodiment of the display panel of the present invention;
FIG. 2 is a configuration diagram of a second embodiment of the display panel of the present invention;
FIG. 3 is a block diagram of a display panel in a third embodiment of the present invention, FIG. 4 is a partial block diagram of a display panel in third and fourth embodiments of the present invention, FIGS. 6 is a block diagram of a drive circuit for a liquid crystal display panel, FIG. 6 is an explanatory diagram of a display panel driving method of the present invention, FIG. 7 is a block diagram of a first embodiment of a liquid crystal video projector of the present invention, and FIG. figure. FIG. 10 is a configuration diagram of a display panel, FIG. 9 is a configuration diagram of an embodiment of the liquid crystal video projector of the present invention, FIG. 11 is a configuration diagram of a conventional display panel, and FIG. 13 is an explanatory diagram of a liquid crystal display panel. , FIG. 14 is an explanatory diagram of a conventional display panel driving method, and FIG. 15 is a configuration diagram of a conventional liquid crystal video projector. 101...Light source, 102.104.106...
...Polarizing plate, 103a, 103c...Glass plate, 103b...Ferroelectric liquid crystal, 105...
...Liquid crystal display panel, 107...Light control circuit, 10B...Display panel control circuit, 109...
...Driver control circuit, 110...Video signal processing circuit, 401a to 401f...Transparent electrode, 402...Signal line, 403... Drive IC, 501...Amplifier, 502...
... Signal speed conversion circuit, 503 ... Phase division circuit, 504 ... Output switching circuit, 505 ...
...Source drive IC. 506...Gate drive IC, 507...
... Driver control circuit, 508 ... Liquid crystal panel, 509 ... Display panel control circuit, 510.
...Light control circuit, 511 ... Ferroelectric liquid crystal panel, 701 ... Screen, 702 ...
...Projection lens, 703...Metal halide lamp, 704 a, 704 b, 704 c
--- Total reflection mirror 705 --- Ultraviolet cut filter 706a, 706b, 706c. 706d・・・Gichromic mirror 707a
, 707b. 707C... Condenser lens, 710...
...Case 4.801゜803, 1001, 1002.1
003...Polarizing plate, 802.1005...
...Liquid crystal display panel, 804.1004...Ferroelectric liquid crystal panel.

Claims (6)

[Claims] (1) A first polarizing plate, a second polarizing plate, a third polarizing plate, a liquid crystal display panel located between the first and second polarizing plates, and between the second and third polarizing plates. What is claimed is: 1. A display panel comprising: a light manipulation means located at a light source and having at least one of a means for rotating light and a means for modulating light. (2) a first polarizing plate, a second polarizing plate, a liquid crystal display panel located between the first and second polarizing plates;
the first panel is located between the first polarizing plate and the liquid crystal display panel, and between the second polarizing plate and the liquid crystal display panel, and the first panel is located between the first polarizing plate and the liquid crystal display panel, and is configured to emit light. A display panel comprising at least one of a means for optical rotation and a means for modulating light. (3) A display panel comprising a liquid crystal display panel and a light operation panel having at least one of a means for rotating light and a means for modulating light, wherein pixels of the liquid crystal display panel are arranged in a horizontal direction. A display panel characterized in that the optical operation panel is arranged so that optical images of the horizontally processed structure of the optical operation panel coincide with each other. (4) In a display panel comprising a polarizing plate, a liquid crystal display panel, and a light operation panel having at least one of a means for rotating light and a means for modulating light, the light operation panel A method for driving a display panel, comprising rotating or blocking light by operating the polarizer to change the amount of light transmitted through the polarizing plate. (5) A light source lamp, and a first and a second light source lamp.
and a color separation means for separating into a third color; first, second and third liquid crystal display panels for modulating each of the first, second and third lights; Third
A video projector comprising: a light combining means for combining light modulated by a liquid crystal display panel into one color; and a light manipulation means for blocking or rotating the light combined by the light combining means. (6) A light source lamp, and a first and a second light source lamp.
and a color separation means for separating into a third color; first, second and third light manipulation means for modulating or optically rotating each of the first, second and third lights; The liquid crystal display panel includes first, second and third liquid crystal display panels that respectively modulate the light that has passed through the second and third light manipulation means, and a light synthesis means that synthesizes the light that has passed through the liquid crystal display panels into one color. A video projector featuring