JP2715797B2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device.

[0002]

2. Description of the Related Art A light flux intensity-modulated by a time-series information signal is projected on a screen by a projection optical system,
A display device capable of displaying a two-dimensional image has been conventionally known. Also, in the above-mentioned conventional technology, a high-brightness, high-resolution optical 2
A signal conversion element capable of realizing even a demand for forming a two-dimensional image, for example, a high-definition two-dimensional image in which 4000 pixels are arranged vertically and horizontally in a state close to real time. In order to solve the point that such a request could not be satisfied because of the absence of the above-mentioned method, the present applicant has previously disclosed a method of radiating light from a light source as disclosed in Japanese Patent Application Laid-Open No. 3-196121. A light beam having a linear cross section is incident on a light modulating unit having a configuration capable of displacing a large number of reflecting members provided for each pixel by pixel information, and is incident on the light modulating unit. The cross-sectional shape of the light beam whose cross-sectional shape is linear is intensity-modulated for each pixel, and the cross-sectional shape is emitted as a linear light beam. The by deflected by incident on the projection lens in the horizontal direction at a predetermined cycle, it was proposed a display device which is adapted to Utsude a two-dimensional image by projecting the screen onto the screen by the projection lens.

However, in the above-mentioned proposed device, the problem is that the light intensity modulation operation by the pixel information performed in the light modulation unit is slow, and a solution to the problem has been sought. The information of the pixel corresponding to each light emitting element is supplied to the N light emitting elements in the light emitting element array in which the N pixels corresponding to the N pixels are linearly arranged over a predetermined period. The N light emitting elements in the light emitting element array emit light simultaneously over the period, and the light emitting elements are emitted from the light emitting elements in a direction orthogonal to the alignment direction of the light emitted from each light emitting element in the light emitting element array. A light-to-light conversion element configured to simultaneously deflect emitted light, wherein the deflected light includes at least a photoconductive layer member and a light modulation material layer member between two electrodes. It is imaged on the photoconductive layer in the light -
FIG. 1 shows a configuration in which read light is given to a light conversion element and image information read from the light-light conversion element is projected on a screen.
A display device as exemplified in FIG.

In FIG. 11, N REAs (where N
Is a natural number of 2 or more pixels and N pixels (where N
Is a light emitting element array in which two or more natural numbers are linearly arranged.
The writing light emitted from the N light emitting elements can emit light simultaneously with a light emission intensity according to information of N pixels on one straight line in an image to be displayed over a predetermined period. It has been made like that. That is, when the image information to be displayed is supplied from the signal source of the image information to the display device as a time-series image signal, for example, the image information is output from the signal source of the image information. The N pieces of pixel information in the obtained time-series image signal are converted into a simultaneous signal by a serial / parallel conversion circuit (for example, a shift register) and supplied to the light emitting element array REA. In the state where the intensity is modulated by the N pieces of pixel information, the N light beams emitted from the N light emitting elements in the light emitting diode array REA are transmitted through the lens L.
Through the oscillating reflecting mirror Mg.
Since the oscillating reflecting mirror Mg is oscillated at a predetermined period in the direction of the arrow in the figure, the light flux incident on the oscillating reflecting mirror Mg moves at a constant moving speed from above to below the light-light conversion element SLM. Is repeatedly projected on the light-to-light conversion element SLM, and the light is imaged on the photoconductive layer member of the light-to-light conversion element (spatial light modulation element) SLM as writing light. Thus, image information to be displayed is written in the light-light conversion element SLM.

The above-mentioned light emitting element array REA is intensity-modulated by N pieces of pixel information on one straight line in an image to be displayed by the N light emitting elements arranged linearly. The light beam is emitted for a predetermined period. After the predetermined period, the N light beams on another straight line in the image to be displayed are displayed. A light flux intensity-modulated by the pixel information is emitted for a predetermined period, and so on, and is intensity-modulated by N pieces of image information on sequentially different straight lines in the image to be displayed. The light of the state is radiated one after another for a predetermined period of time, whereby the light-light conversion element S
Bright writing light will be given on the LM. As the light-light conversion element SLM used in the display device shown in FIG. 11, for example, as illustrated in FIG. 12, a transparent substrate BP1 and a transparent electrode Et1 are used.
A so-called reflection-type light-to-light conversion element is formed by laminating the photoconductive layer member PCL, the dielectric mirror DML, the light modulation material layer member PML, the transparent electrode Et2, and the transparent substrate BP2. Alternatively, a transmission-type light-to-light conversion element (not shown) may be used.

The structure and operation of the light-light conversion element SLM will be described below with reference to FIG. In the light-to-light conversion element SLM, the transparent electrodes Et1 and Et2 are formed of a thin film of a transparent conductive material, and the photoconductive layer member PCL is formed of a material having photoconductivity in a wavelength region of light to be used. Be composed. Also,
As the dielectric mirror DML, a well-known one configured as a multilayer film so as to reflect light in a predetermined wavelength band can be used. Further, as the light modulating material layer member PML, the applied electric field intensity can be used. For example, a light modulating material that changes the state of light according to the light, for example, a crystal having an electro-optical effect, a liquid crystal exhibiting birefringence characteristics, or another light modulating material layer member is used. Further, in FIG. 12, E denotes a power supply for applying a predetermined voltage between the transparent electrodes Et1 and Et2.

[0007] WL in FIG. 12 is incident from the substrate BP1 side of the light-to-light conversion element SLM and is a photoconductive layer member PCL.
This writing light WL is intensity-modulated by information to be displayed. Therefore, in the display device shown in FIG. 11, the transparent substrate BP in the light-light conversion element SLM in which a predetermined voltage is supplied from the power supply E between the transparent electrodes Et1 and Et2.
From the first side, when N writing light fluxes whose intensity is modulated by the image information reflected by the oscillating reflecting mirror Mg are condensed on the photoconductive layer member PCL by the lens L, the N
Photoconductive layer member PCL at a portion where book writing light beam is focused
Is changed according to the amount of light irradiated, and N lines whose intensity is modulated by the image information to be displayed as described above at the boundary between the photoconductive layer member PCL and the dielectric mirror DML. A charge image corresponding to the amount of light emitted by the writing light is favorably formed, and accordingly, the light modulating material layer member PML of the light-light conversion element SLM is provided at the boundary between the photoconductive layer member PCL and the dielectric mirror DML. An electric field based on the formed N charge images is applied.

[0008] LS in FIG. 11 is a light source of the reading light,
The readout light R emitted from the above-mentioned readout light source LS
When L is incident on the polarization beam splitter PBS, the S-polarized light component of the readout light RL is reflected by the polarization beam splitter PBS toward the readout side of the light-light conversion element SLM, and the readout of the light-light conversion element SLM is performed. From the transparent substrate BP2 on the side. As described above, the light-light conversion element S
As described above with reference to FIG. 12, the read light RL incident from the transparent substrate BP2 side of the LM is the transparent substrate BP2 → the transparent electrode Et2 → the light modulating material layer member PML → the dielectric mirror DM.
The reflected light of the read light that reaches the dielectric mirror DML via the path L is reflected by the dielectric mirror DML → the light modulation material layer member PML → the transparent electrode Et2 → the transparent substrate BP2 →
The light exits from the light-light conversion element SLM along the path.

[0009] As described above, the light fluxes of the N pieces of readout light simultaneously emitted from the light-to-light conversion element SLM are in a state in which charges of a charge amount corresponding to N pieces of sequential pixel information are arranged. Since the light beam is a light beam that has reciprocated through the light modulating material layer member PML to which the electric field due to the charge image is applied, the light beam changes its state of the polarization plane corresponding to the N pieces of linearly arranged pixel information. Is what you are doing. And
The N readout lights simultaneously emitted from the light-light conversion element SLM enter the polarization beam splitter PBS, and the P-polarized light component of the incident light is simultaneously given from the polarization beam splitter PBS to the projection lens Lp, The projection lens Lp simultaneously projects it as N light spots linearly arranged on the screen S.

[0010]

By the way, as in the display device described with reference to FIG. 11, light information linearly arranged in a predetermined direction is converted by a light deflecting device using an oscillating reflecting mirror Mg. When the light is deflected in a direction orthogonal to the direction of the arrangement of the optical information, the oscillating reflecting mirror Mg rotates forward during an image signal period (video signal period) of an image signal to be displayed. A normal display image cannot be displayed on the screen S unless the operation is repeated and the operation is not performed again during the vertical blanking period. That is,
The oscillating reflecting mirror Mg performs forward rotation during an image signal period (video signal period) of an image signal to be displayed, and backward rotation during a vertical blanking period. However, if the image signal to be displayed is, for example, as shown in FIG. 4A, the oscillating reflecting mirror Mg In response to the image signal period (video signal period) and the vertical blanking period in the image signal to be displayed, the reciprocating operation as shown in FIG. Is required.

The above-mentioned oscillating reflector Mg is a member having a mechanical impedance such as mass, stiffness, mechanical resistance, etc., and oscillates to drive the oscillating reflector Mg. Since it constitutes a part of a mechanical vibration system constituted by a component having mechanical impedance due to mass, stiffness, mechanical resistance and the like of the swing drive unit 3 connected to the reflecting mirror Mg, The driving displacement mode follows the driving displacement characteristics of the mechanical vibration system described above. However, a mechanical vibration system including the oscillating mirror Mg generally has a large mechanical impedance in a high frequency region. Since only a small speed is generated with respect to the driving force supplied at the time of the backward rotation performed during the short vertical blanking period, for example, FIG. In response to the vertical blanking period in the image signal to be displayed as shown in FIG. 4A, the oscillating reflecting mirror Mg is moved back and forth as shown in FIG. It is difficult to perform the reciprocating operation, and the reciprocating reciprocating operation time of the oscillating reflecting mirror Mg is the vertical return of the image signal to be displayed as shown in FIG. The period becomes longer than the line erasing period, so that a part of the image signal is not displayed. In order to solve the above problem, for example, as a mechanical vibration system including the oscillating reflecting mirror Mg, the same reverse rotation as the vertical blanking period in the image signal to be displayed is performed. Although it is conceivable to use a device having a configuration that allows various working times, such a high-performance device is expensive and cannot be used as a component of a display device.

When a color image is displayed by using image signals of three primary colors in a frame sequence, one complete color image is displayed by superimposing the images of the three primary colors. In order to display a flicker-free color image, the number of fields per second naturally increases, so that a swinging mirror Mg having a short swinging period is required. A high-performance device that can obtain the same return operation time as the vertical blanking period in the image signal to be displayed by the reflecting mirror is expensive and cannot be used as a component of the display device. Further, if the displacement of the oscillating reflector during the oscillating operation is non-linear, shading may occur in the display image, but the displacement of the oscillating reflector on the time axis is problematic. The problem of non-linearity is particularly large when a resonant-type oscillating reflector is used as the oscillating reflector, but also becomes a problem with a non-resonant-type oscillating mirror. Therefore, a solution to the above-mentioned problems has conventionally been required.

[0013]

According to the present invention, there is provided an oscillating reflector for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information. A display in which light deflected by the oscillating reflecting mirror is made incident on a light-to-light conversion element including at least a photoconductive layer member and a light modulation material layer member between two electrodes. In the apparatus, the backward turning operation time in the above-mentioned oscillating reflecting mirror performing the reciprocating turning operation in the oscillating cycle corresponding to the vertical scanning cycle of the original image signal to be displayed is set as the display target. And the forward rotation of the oscillating reflector is shortened with the increase of the operation time of the oscillating reflector. The portion of the image signal during the period excluding the vertical flyback period within the operation time By generating an optical signal that is linearly arranged in a specific direction in the above-mentioned predetermined direction by an image signal obtained by performing time axis compression on an original image signal so as to fit therein, the optical information is forwarded in an oscillating reflecting mirror. A display device to be applied to the oscillating reflector during the moving operation, and oscillating for deflecting light information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information. A light-light conversion element comprising a reflecting mirror and converting the light deflected by the oscillating reflecting mirror into a light-light converting element including at least a photoconductive layer member and a light modulating material layer member between two electrodes. In the display device which is caused to enter the light beam, the reciprocating operation of the oscillating reflecting mirror performs reciprocating operation in an oscillating cycle corresponding to the vertical scanning cycle of the original image signal to be displayed. Time vs display The period is set larger than the vertical blanking period of the original image signal set as described above, and the forward and backward movements of the oscillating reflecting mirror are shortened in accordance with the increase of the backward turning operation time of the oscillating reflecting mirror. An image signal obtained by performing time-axis compression on the original image signal so that all of the image signal except for the vertical retrace period within the moving time is linearly moved in the specific direction in the predetermined direction. And the optical information is given to the oscillating reflector during the forward and backward rotation in the oscillating reflector, and within the backward rotation and working time in the oscillating reflector. The image signal obtained by performing time-axis compression on the original image signal so that all of the same image signal as the image signal used for display within the forward and backward operation time of the oscillating reflecting mirror is accommodated in advance. Contrary to a specific direction in a prescribed direction A display device that generates optical information linearly arranged in the direction of the mirror, and provides the optical information to the oscillating reflector during the backward rotation of the oscillating reflector, and a predetermined direction. A oscillating reflector for deflecting the optical information linearly arranged in a direction perpendicular to the direction of the arrangement of the optical information, and deflecting the light deflected by the oscillating reflector between the two electrodes. In a display device that is configured to be incident on a light-light conversion element configured to include at least a photoconductive layer member and a light modulation material layer member, the forward and backward operation time in the oscillating reflector described above. The time for each return rotation,
The vertical scanning period of the original image signal to be displayed is set to be equal to the vertical scanning period of the original image signal. Generating optical information linearly arranged in a specific direction in a predetermined direction, and giving the optical information to the oscillating reflecting mirror during the forward rotation in the oscillating reflecting mirror,
In addition, during the backward rotation time of the oscillating reflecting mirror, the image signal of the (n + 1) th vertical scanning period in the original image signal is linearly moved in a direction opposite to a specific direction in a predetermined direction. A display device that generates optical information arranged in a row, and supplies the optical information to the swinging mirror during the backward rotation of the swinging mirror, and light that is linearly arranged in a predetermined direction. An oscillating reflector for deflecting information in a direction orthogonal to the direction of the arrangement of the optical information, wherein the light deflected by the oscillating reflector is at least a photoconductive layer member between two electrodes. In a display device configured to be incident on a light-to-light conversion element including a light modulating material layer member and a light modulating material layer member, the vertical scanning period of one primary color signal in a three-color image signal in a frame sequence is twice as long as the vertical scanning period. Reciprocating the oscillating mirror with a cycle of Together cause the people work, the image signal of field sequential primary color that are arranged sequentially on the time axis 1
When the optical information based on the image signal for each vertical scanning period is deflected during the forward rotation of the oscillating reflecting mirror, the light linearly arranged in a specific direction in a predetermined direction based on the image information described above. In addition, optical information is generated by the image signal of each primary color, which is sequentially arranged on the time axis, in each vertical scanning period, and the information signal is generated by the backward rotation of the oscillating reflecting mirror. When the light is sometimes deflected, light information linearly arranged in a direction opposite to the specific direction in the predetermined direction is generated to give the light information to the oscillating reflector. A display device, and a swing reflecting mirror for deflecting the optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information, and deflecting by the swing reflecting mirror. At least the light between the two electrodes In a display device configured to be incident on a light-to-light conversion element configured to include an electric layer member and a light modulation material layer member, a vertical scanning cycle of one primary color signal in a plane-sequential three primary color image signal Means for reciprocatingly rotating the oscillating mirror with a period twice as long as that of the oscillating reflector; Means for changing the light intensity of the optical information to correspond to the non-linearity of the displacement of the oscillating reflector on the time axis so that shading does not occur in the image, and the oscillating reflector. The optical information based on the image signal for each vertical scanning period of the image signal of each of the primary colors which are deflected at the time of forward rotation is linearly shifted in a specific direction in a direction predetermined by the above-mentioned image information. Are lined up and swing The optical information based on the image signal for each vertical scanning period of the plane-sequential image signal of each primary color that is deflected during the backward rotation of the mirror is opposite to the specific direction in the above-described predetermined direction. A display device comprising means for being arranged in a line in a straight line, and light information linearly arranged in a predetermined direction,
An oscillating reflector for deflecting the light in the direction orthogonal to the direction of the arrangement of the optical information, wherein the light deflected by the oscillating reflector is at least light-modulated between the two electrodes by a photoconductive layer member. Means for causing the oscillating reflecting mirror to reciprocate in a reciprocating manner in correspondence with the vertical scanning period of the image signal. Means for providing optical information to the oscillating reflector at a time position where image distortion due to non-linearity on the time axis of the displacement of the oscillating reflector is not performed, and the light intensity of the optical information is set to the displacement of the oscillating reflector. And a means for changing the image so that shading does not occur in the image in correspondence with the non-linearity on the time axis.

[0014]

According to the present invention, it is possible to display the time required for the return rotation of the oscillating reflector to perform the reciprocating rotation at the oscillating cycle corresponding to the vertical scanning cycle of the original image signal to be displayed. In this case, it is set to be longer than the vertical blanking period of the original image signal, and the forward rotation of the oscillating reflector is shortened with the increase of the backward rotation and operation time of the oscillating reflector. An image signal is generated by performing time axis compression on the original image signal so that the image signal portion of the period except the vertical blanking period falls within the operation time. Then, using the image signal described above, optical information that is linearly arranged in a specific direction in a predetermined direction is generated, and the optical information is reflected by the oscillating reflecting mirror during the forward rotation and the backward rotation. Give to the mirror. In addition, the return turning and turning operation time of the oscillating reflector performing the reciprocating turning operation at the oscillating cycle corresponding to the vertical scanning period of the original image signal to be displayed is set to be displayed. It is set to be longer than the vertical blanking period of the original image signal, and the forward and backward operation of the oscillating reflecting mirror is shortened with the increase of the returning and operating time of the oscillating reflecting mirror. An image signal is generated by performing time-axis compression on the original image signal so that all the image signals during the period except the vertical blanking period fall within the time.

By using the above-mentioned image signal, light information linearly arranged in a specific direction in a predetermined direction is generated, and the light information is generated during the forward and backward operation of the oscillating reflector. Give to the oscillating reflector. Also, all the same image signals as the image signals used for display within the forward rotation and the operation time of the oscillating reflector are accommodated within the backward rotation and the operation time of the oscillating reflector. An image signal is generated by performing time axis compression on the original image signal. The image information is used to generate light information linearly arranged in a direction opposite to a specific direction in a predetermined direction, and to oscillate the light information during the reciprocating operation of the oscillating reflector. Give to the dynamic reflector.

Further, the forward rotation time and the backward rotation time of the oscillating reflecting mirror are set to be equal to the vertical scanning period of the original image signal to be displayed. Within the time of the forward rotation of the oscillating reflecting mirror, the optical signal linearly arranged in a specific direction in a predetermined direction is generated by the image signal of the nth vertical scanning period in the original image signal, The optical information is given to the oscillating reflector during the forward and backward rotation of the oscillating reflector. In addition, during the backward rotation time of the oscillating reflecting mirror, the image signal of the (n + 1) th vertical scanning period in the original image signal is linearly moved in a direction opposite to a specific direction in a predetermined direction. Are generated, and the optical information is given to the oscillating reflector during the backward rotation operation of the oscillating reflector.

Further, when a color image is displayed by image signals of three primary colors in a frame sequence, when the oscillating reflecting mirror is caused to reciprocate twice at a cycle twice as long as the vertical scanning cycle of each primary color signal, In the case where light information based on image signals for each vertical scanning period of the image signals of each of the primary colors arranged sequentially on the time axis in each vertical scanning direction is deflected during the forward rotation of the oscillating reflecting mirror, The optical information that is linearly arranged in a specific direction in a predetermined direction based on the image information is generated and supplied to the oscillating reflecting mirror. When the optical information based on the image signal of each primary color image signal for each vertical scanning period is deflected during the forward rotation of the oscillating reflecting mirror, the specific direction in the predetermined direction is Oscillating reflector that generates light information that is linearly arranged in the opposite direction Give.

Further, the distortion of the shape caused in the image due to the non-linearity of the displacement of the oscillating reflector on the time axis corresponds to the non-linearity of the displacement of the oscillating reflector on the time axis. The time position at which optical information is given to the mirror is changed and eliminated. Even when changing the time position at which the optical information is given to the oscillating reflector as described above, in correspondence with the nonlinearity on the time axis of the displacement of the oscillating reflector so that shading does not occur in the image, The intensity of the optical information supplied to the oscillating mirror is changed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific contents of a display device according to the present invention will be described in detail with reference to the accompanying drawings. 1 and 5
FIG. 2 is a perspective view of an embodiment of a display device of the present invention, FIGS. 2 and 3 and FIG. 6 are block diagrams of a part of a configuration circuit, and FIGS. 4 and 7 to 10 are diagrams for explaining the configuration principle and operation principle. FIG. 12 is a waveform diagram and FIG. 12 is a diagram showing a configuration example of the light-light conversion element. In FIGS. 1 and 5 showing the display device of the present invention, components corresponding to each component in the display device described above with reference to FIG. Use sign. 1 and 5 showing the display device of the present invention, REA is N (where N is a natural number of 2 or more) pixels and N (where N is a natural number of 2 or more) light emitting elements corresponding to N pixels. Are light emitting element arrays arranged linearly. In each of the drawings, reference numeral 1 denotes a signal source for generating an image signal to be displayed, and writing radiated from N light emitting elements by the image signal supplied from the signal source 1 to the light emitting element array REA. The light is emitted at an emission intensity according to the information of N pixels on one straight line in the image to be displayed.

When the image information to be displayed is a time-series image signal, the light emitting element array REA described above is used.
In a case where the writing light emitted from the N light-emitting elements by the image signal supplied to the light emitting element is simultaneously emitted for a predetermined period, the writing light is supplied from the signal source of the image information to the display device. For example, when the pixel information in a time-series image signal output from a signal source of image information is converted into a simultaneous signal by a serial / parallel conversion circuit (eg, a shift register), the light emitting element array What is necessary is just to supply to REA. In the state where the intensity is modulated by the N pieces of pixel information, the light emitting element array REA
N light beams emitted from the N light-emitting elements in the above-mentioned light incident on the light deflecting device by the oscillating reflecting mirror Mg via the lens L.

Now, the image signal illustrated in FIG. 4A is vertically deflected by an optical deflecting device using an oscillating reflecting mirror Mg and is required to accurately display the oscillating reflecting mirror Mg. The mode of displacement on the time axis is as shown in FIG. 4B, but the displacement of the oscillating reflecting mirror Mg during the vertical retrace period in the image signal illustrated in FIG. As described above, it is difficult to configure the light deflecting device using the oscillating reflector so as to perform the backward rotation. However, in the display device shown in FIG. The time required for the backward rotation of the mirror is set to be long, so that the configuration of the light deflecting device using the oscillating reflecting mirror Mg is facilitated.
The conventional problem can be solved by converting the time axis of the image signal to be displayed in response to the change of the time length of the backward rotation of g.

In the display device shown in FIG. 1, the reciprocating operation is performed in a swing cycle corresponding to the vertical scanning cycle 1V of the original image signal to be displayed shown in FIG. As shown in FIG. 4D, the period during which the swinging reflecting mirror Mg of the light deflector is rotated in the backward direction is set as the vertical blanking period of the original image signal to be displayed. The vertical retrace period is set within the forward rotation time of the oscillating reflector, which is shortened with the increase of the backward rotation time in the oscillating reflector Mg. An image signal as shown in FIG. 4 (c) obtained by performing time axis compression on the original image signal so that the portion of the image signal during the excluded period is accommodated is generated by the signal source 1, and the image signal is generated by the light emitting element array REA. And the writing light emitted from the N light-emitting elements to the lens L
Through the mirror and into the optical deflector by the oscillating reflecting mirror Mg. The light beam incident on the oscillating reflecting mirror Mg repeats the operation in the operation mode of moving at a constant moving speed from the top to the bottom of the light-light conversion element SLM, and the configuration, operation and Is projected onto the light-to-light conversion element SLM described above, and the light is imaged on the photoconductive layer member of the light-to-light conversion element (spatial light modulation element) SLM as writing light, and the light-to-light conversion is performed. Image information to be displayed is written in the element SLM.

The reading of the information signal from the light-light conversion element SLM in which the image information to be displayed is written and the projection operation on the screen S are shown in FIGS.
This is performed as described with reference to FIGS. That is,
The readout light R emitted from the readout light source LS in FIG.
When L is incident on the polarization beam splitter PBS, the S-polarized light component of the readout light RL is reflected by the polarization beam splitter PBS toward the reading side of the light-light conversion element SLM, and the light-light conversion element SLM. 12 is incident from the transparent substrate BP2 on the read side of FIG.
As described above with reference to the above, the reflected light of the read light that reaches the dielectric mirror DML via the path of the transparent substrate BP2 → the transparent electrode Et2 → the light modulating material layer member PML → the dielectric mirror DML is reflected by The light exits the light-to-light conversion element SLM via the path of the dielectric mirror DML → the light modulating material layer member PML → the transparent electrode Et2 → the transparent substrate BP2 →, enters the polarization beam splitter PBS, and the P-polarized light in the incident light. The components are simultaneously provided from the polarizing beam splitter PBS to the projection lens Lp, which projects it to the screen S
The image is projected as N light spots linearly arranged on the upper side.

FIG. 2 shows the display device of the present invention shown in FIG. 1 in which the vertical blanking period is longer than that of the original image signal to be displayed shown in FIG. FIG. 5 is a block diagram showing a configuration example of a signal generation unit that can generate an image signal as shown in FIGS. 4C, 4E, and 4G having a vertical blanking period. And FIG.
FIG. 3 is a block diagram of a signal generation unit configured using a FIFO (20) as a storage device. The signal generating unit illustrated in FIGS. 2 and 3 forms a part of the component of the signal source 1 illustrated in FIG. 2 and 3, reference numeral 6 denotes an input terminal of an original image signal to be displayed {for example, an original image signal to be displayed as shown in FIG. It is. In FIG. 2, the original image signal supplied to the input terminal 6 to be displayed is
In accordance with the switching operation of the signal switch 7, the image signals for each vertical scanning period are alternately sequentially and alternately stored in the storage devices 10, 1 via the lines 8, 9.
Feed to 1. In the following description, the image signals stored in the storage devices 10 and 11 for simplifying the description are
It is assumed that the image signal has a time length of one vertical scanning period from the beginning of the vertical blanking period in the sequential vertical scanning period.

As the storage devices 10 and 11, for example, a frame memory can be used. The signal switching operation in the signal switch 7 is performed by a switching control signal generated in the write / read control unit 4. The write / read control unit 4 performs switching based on a periodic signal such as a vertical synchronizing signal of an original image signal to be displayed, which is supplied from the input terminal 6 via a line 25. Control signals are supplied to the signal switches 7 and 18 via lines 24 and 14, write control signals and read control signals are supplied to the storage devices 10 and 11 via lines 12 and 13, Or a control signal is supplied to the address signal generator 5 via the.

The operation of the signal generator of FIG. 2 when the image signal illustrated in FIG. 4A is time-axis-compressed and converted into, for example, the image signal illustrated in FIG. 4C. Is as follows. For example, the signal switch 7 to which the original image signal shown in FIG. 4A is supplied via the input terminal 6 is supplied to the write / read control unit 4.
The switching operation is performed by the switching control signal supplied from the line 24 through the line 24, and the image signal for each time length of one vertical scanning period in the image signal illustrated in FIG. Are supplied alternately to the storage devices 10 and 11 in turn. The storage devices 10 and 11 include a write / read control unit 4
A write control signal or a read control signal supplied via lines 12 and 13 from the
When one storage device 10 (or 11) is performing a storage operation for one vertical scanning period in response to an address signal supplied via the address supply lines 15a and 15b from the other storage device 11 (or 11b). Or 1
0) is set to a state in which the read operation is being performed over one vertical scanning period, so that the write operation and the read operation are sequentially and alternately performed, and at the time of the write operation and the read operation. By changing the cycle of the clock signal in the above, a predetermined time axis compression is performed on the image signal.

The image signals read from the storage devices 10 and 11 are supplied to a signal switch 18 via lines 16 and 17. The signal switch 18 is connected to the read / write control unit 4 via the line 14
The image signals read from the storage devices 10 and 11 are sent to the output terminal 19 in accordance with the switching performed by the switching control signal supplied via the control terminal. As mentioned above, FIG.
(A) The return of the oscillating reflecting mirror Mg of the optical deflecting device that performs reciprocating rotation with an oscillating cycle corresponding to the vertical scanning cycle 1V of the original image signal to be displayed as shown in FIG. As illustrated in FIG. 4D, the period of the moving operation is set to be longer than the vertical blanking period of the original image signal to be displayed. (C) of FIG. 4 so that the portion of the image signal during the period excluding the vertical retrace period falls within the forward rotation-after-operation time of the oscillating reflector, which is shortened with the increase of the return rotation-on operation time. If the light emitted by the image signal obtained by compressing the time axis of the original image signal is vertically deflected by the oscillating reflector Mg as shown in FIG. It is possible to easily display an image in which the content is not lost.

If the display mode performed by the display device shown in FIG. 1 is performed as described with reference to FIGS. 4C and 4D, the rotation of the oscillating reflecting mirror Mg will be described. The drive time of the oscillating reflecting mirror Mg is facilitated by the setting of the working time, but the brightness of the image is naturally increased by the setting of the turning time of the oscillating reflector Mg. However, the above-mentioned problem is caused by setting the time axis compression mode of the image signal as illustrated in, for example, FIGS. 4 (e) and 4 (g). This can be solved by setting the manner of setting the rotation time as illustrated in FIGS. 4 (f) and 4 (h).

First, FIGS. 4 (e) and 4 (f) show the setting of the turning operation time of the oscillating reflecting mirror Mg as exemplified in FIG. 4 (f). 4 (d), which is much larger than the case of FIG. 4 (d). In FIG. In the embodiment of the present invention, the working time and the returning rotation time of the oscillating mirror Mg and the returning rotation of the oscillating mirror Mg are both set equal to each other. The work time does not have to be equal.光, and the light by the same image signal is generated in the oscillating reflecting mirror Mg both in the forward turning operation of the oscillating reflecting mirror Mg and in the backward turning operation of the oscillating reflecting mirror Mg. The original image signal shown in FIG. 4 (a) is illustrated in FIG. 4 (e) by, for example, a signal generation unit as illustrated in FIG. 2 so that it can be reflected by the same reflecting surface. After the image signal is converted into the image signal as shown in FIG. 4 (e), the image signal as illustrated in FIG. 4 (e) is added to the tip of the arrow between FIG. 4 (e) and (f). A case is shown in which the light is reflected by the oscillating mirror Mg at the time of the portion indicated by.

The image signals exemplified in FIG. 4E are image signals F1, F2,... In one vertical scanning period of the original image signal shown in FIG. The two storage devices 10, 1 in the signal generator illustrated in FIG.
1 are written alternately in sequence, as shown in FIG.
As in the case described above with reference to (d), the image signal written in the storage device 10 (or 11) in one vertical scanning period is equal to the time length of one vertical scanning period of the original image signal. 1 /
After being read once with a time length of 2, the next 1
The time length of the vertical scanning period is ２ of that of the vertical scanning period, and the image signal is read out again in a reading mode opposite to the reading mode at the time of reading the image signal.
In both forward rotation and backward rotation of the oscillating reflecting mirror Mg, light by the same image signal is reflected by the same reflecting surface of the oscillating reflecting mirror Mg. Because

The above operation state is as shown in FIG. 4 (e), the vertical scanning period F1 (α, β) → vertical scanning period F1 (β, α) → vertical scanning period F2 (α, β) → vertical scanning period F2 (β, α) → vertical scanning period F3 (α, β) → vertical scanning period F3 (β, α)... And written between (e) and (f) in FIG. Although illustrated and described by arrows, the above-described write and read operations in the storage devices 10 and 11 are performed by controlling the manner of generation of the address signal in the address signal generation unit 5 and writing and reading operations of the storage devices 10 and 11. Satisfactorily can be realized by the control operation of the write / read control unit 4 which performs the above control.

FIGS. 4 (g) and 4 (h) show the manner in which the turning operation time of the oscillating reflecting mirror Mg is set, as exemplified in FIG. 4 (h). The forward and backward operation time of Mg and the backward and forward operation time of the oscillating reflecting mirror Mg are made equal to each other, such as 1 V / 2, which is larger than the case of FIG. The width is large, and when the above-mentioned swinging reflecting mirror Mg is moved forward and backward, and when the swinging reflecting mirror Mg is moved backward and forward,
When light based on the image signal in one sequential vertical scanning period is reflected by the oscillating reflecting mirror Mg, the display images displayed by the image signal are alternately sequentially read from the storage devices 10 and 11 so as to be in a normal state. Are sequentially read out during one vertical scanning period F1, F2,...
→ Vertical scanning period F2 (β, α) → Vertical scanning period F3 (α, β) →
.. Are read out. Storage device 10,
The above-described write / read operation at 11 is performed by controlling the manner in which the address signal is generated by the address signal generator 5 and controlling the write / read controller 4 that controls the write and read operations of the storage devices 10 and 11. Needless to say, it is realized well.

As described above, the vertical scanning period 1 of the original image signal to be displayed shown in FIG.
As shown in FIGS. 4F and 4H, the mode of the reciprocating operation of the oscillating reflecting mirror Mg of the optical deflector which performs the reciprocating operation with the oscillating cycle corresponding to V is illustrated. The period is set to be larger than the vertical blanking period of the original image signal to be displayed, and both the forward rotation operation period and the backward rotation operation period of the oscillating reflecting mirror Mg are set. Light emitted by an image signal obtained by time-axis-compressing the original image signal as shown in FIGS. 4E and 4G so that the image signal portion of the period excluding the vertical blanking period falls within the period. Oscillating reflector mirror Mg
Vertical deflection, it is possible to easily display an image in which the content of the image signal is not lost even if the swinging mirror Mg is operated backward and long.

In implementing the display device of the present invention having the configuration shown in FIG. 1, the light vertically deflected by the oscillating reflecting mirror Mg is intensity-modulated by, for example, an image signal. The light beam may be deflected in one direction in the tilted state, and in the embodiment of the present invention, the setting of the turning operation time of the oscillating reflecting mirror Mg is shown in FIG. As illustrated in h), a state in which the forward and backward operation time of the oscillating reflecting mirror Mg is equal to the backward and forward operating time of the oscillating reflecting mirror Mg, and both are set to 1 V / 2. In the above, when the oscillating reflection mirror Mg is moved forward and backward, and when the oscillating reflection mirror Mg is moved back and forth, light based on the image signal for one vertical scanning period is sequentially transmitted to the oscillating reflection mirror Mg. When reflected by the camera, the displayed image is displayed in the correct state. In so that, successively one vertical scanning is sequentially read alternately from the memory devices 10 and 11 periods F1, F2
.. Are read in the following manner: vertical scanning period F1 (α, β) → vertical scanning period F2 (β, α) → vertical scanning period F3 (α, β) → .., vertical scanning period F2 (α, β) → vertical scanning period F3 (β, α)..., the state of the displayed image can be inverted upside down. Also, if reading from the storage devices 10 and 11 is performed in the left and right directions on the display screen, the displayed image is also turned left and right. Thus, a display image in a state where the display image is inverted upside down, left and right can be easily displayed, and a display device that can be used for both the front projector and the rear projector can be easily provided.

Next, in the display device of the present invention shown in FIG. 5, REA is composed of N pixels (where N is a natural number of 2 or more) and N pixels (where N is a natural number of 2 or more). ) Is a light emitting element array in which the light emitting elements are linearly arranged, and 1 is a signal source for generating a color image signal to be displayed. The color image signal supplied from the signal source 1 to the light emitting element array REA is, in the following description, a plane-sequential color image signal based on three primary color signals R, G, and B of additive color mixture. The writing light radiated from the N light-emitting elements by the plane-sequential color image signal supplied from the signal source 1 to the light-emitting element array REA is N light on one straight line in the image to be displayed. Light is emitted at an emission intensity according to the information of the individual pixels. The writing light emitted from the N light emitting elements according to the image signal supplied to the light emitting element array REA,
In order to simultaneously emit light for a predetermined period, for example, N pieces of pixel information in a time-series image signal output from a signal source of image information are converted into a serial-parallel conversion circuit (for example, a shift register). May be supplied to the light emitting element array REA after being converted into a simultaneous signal. In a state where the intensity is modulated by the N pieces of pixel information described above,
N light beams emitted from the N light emitting elements in the light emitting element array REA are transmitted through the lens L to the oscillating reflecting mirror Mg.
To the light deflecting device.

Each of FIGS. 7 to 10 (a),
4B is a diagram having the same contents as (a) and (b) in FIG. 4 described above, and (a) in each of the above-described drawings is sequentially arranged on the time axis. Are image signals of 1 V in one vertical scanning period (one field period), and F1 and F shown in FIG.
Symbols such as 2, F3... Indicate field numbers. In addition, in the image signals of the respective vertical scanning periods 1V successively arranged on the time axis shown in FIG. Of the vertical scanning periods 1V
The portion denoted by the reference symbol β indicates the end of the image signal in each vertical scanning period 1V. The meanings of the symbols α and β are the same for the symbols α and β used in each of (c) to (f) in FIGS. 7 to 10.

Each of FIGS. 7 to 10 shown in FIG.
In the figure of (c), the symbols of F1R, F2R, F3R... indicate the signals of the red primary color signal R in one sequential vertical scanning period in the three primary color image signals (three primary color signals). 7 to 10, F1G, F2G, F3
The symbols G ... indicate the signals in one vertical scanning period of the green primary color signal G in the three primary color signals in sequence.
F1B, F2 in each of FIGS.
.. B, F3B... Are signals of the blue primary color signal B in the three primary color signals in one successive vertical scanning period, and are shown in (c) to (e) of FIGS. 7 to 10 described above. The three primary color signals are simultaneous signals as can be seen from the field numbers shown in the figure.

Further, each of FIGS.
(g) shows the displacement on the time axis due to the rotation of the oscillating reflector Mg used in the display device shown in FIG. 5, that is, the oscillation of the oscillating reflector Mg. The mode of exercise is shown, and each of the figures in FIGS.
(f) shows each (g) in each of FIGS. 7 to 10 described above.
2 shows a field-sequential (field-sequential) image signal for generating optical information for performing sub-scanning by the oscillating movement of the oscillating reflecting mirror Mg shown in FIG. In each of FIGS. 7 to 10 described above, the three primary color signals in the field sequence (field sequential) shown in (f) correspond to the vertical scanning period of the image signal of each primary color (each primary color signal). 7 to 10 are 1/3 of the vertical scanning period in the simultaneous signals of the three primary color signals shown in (c) to (e) of each drawing. By the way, the three-primary-color signals of the frame sequential (field sequential) shown in each of FIGS. 8 to 10 (f) are shown in each of (g) of FIGS. 8 to 10. The sub-scanning of the optical information by the above-described three primary color signals is performed only for each forward rotation in the swinging motion of the swinging reflecting mirror Mg. However, the three sequential primary colors shown in FIG. The signal is generated by the three primary color signals at both the forward rotation and the backward rotation in the swinging motion of the swinging reflecting mirror Mg shown in FIG. 7 (g). Since the sub-scanning of the information is performed, the arrangement of signals in each vertical scanning period successive on the time axis is shown in FIG.
As can be seen from the symbol α indicating the beginning of one vertical scanning period and the symbol β indicating the end of one vertical scanning period, the state is inverted every vertical scanning period.

Each of (c) to (c) in each of FIGS.
(e) is subjected to time axis compression and other signal processing on the simultaneous signal of the three primary color signals to obtain a frame sequential three primary color signal as shown in (f) of each figure. The signal conversion process is performed in the signal source 1 that operates under the control of the control unit 2 in the display device in FIG. 5, and the plane-sequential three primary color signals generated by the signal source 1 emit light in FIG. The writing light supplied to the element array REA and radiated from the light emitting element array REA is made incident on the light deflecting device using the oscillating reflecting mirror Mg via the lens L. The light beam incident on the oscillating reflecting mirror Mg repeats the operation in the operation mode of moving at a constant moving speed from the top to the bottom of the light-light conversion element SLM, and the configuration, operation and Is projected on the light-to-light conversion element SLM described above, and the light is used as writing light.
(Spatial light modulator) Imaged on the photoconductive layer member of the SLM,
Image information to be displayed is written in the light-light conversion element SLM.

The basic operation of reading out the information signal from the light-to-light conversion element SLM in which the image information to be displayed is written and projecting it onto the screen S is shown in FIG.
1 and FIG. 12. The read light RL of white light emitted from the light source LS of the read light in FIG. 5 is incident on the polarization beam splitter PBS via the rotation type surface sequential optical filter CF that transmits each primary color light in a plane sequence. Of course, as the above-mentioned plane sequential optical filter CF, for example, a liquid crystal shutter type may be used, and the primary colors incident on the polarization beam splitter PBS via the above described plane sequential optical filter CF may be used. It is natural that the color synchronization is established between the two types of light so that the switching of the type of light is performed in a state in which the type of the primary color signal in the three-color primary color signals is correctly corresponded.

The S-polarized light component in the readout light RL for each specific primary color is reflected by the polarizing beam splitter PBS toward the readout side of the light-to-light conversion element SLM.
Light enters from the transparent substrate BP2 on the read side of the LM. As described above with reference to FIG. 12, the read light RL reaches the dielectric mirror DML via the transparent substrate BP2 → the transparent electrode Et2 → the light modulation material layer member PML → the dielectric mirror DML, and is reflected there. The reflected light of the read-out light exits from the light-light conversion element SLM through a path of the dielectric mirror DML → the light modulating material layer member PML → the transparent electrode Et2 → the transparent substrate BP2 → and enters the polarization beam splitter PBS. The P-polarized light component of the incident light is a polarized beam splitter PBS
From the projection lens Lp at the same time.
Causes the light to be projected on the screen S as N light spots by light of each specific primary color linearly arranged.

FIG. 6 shows the display device of the present invention shown in FIG. 5 in each of FIGS.
The time axis compression and other signal processing are performed on the simultaneous signals of the three primary color signals shown in (e) to perform frame sequential (field sequential) as shown in (f) of each figure. FIG. 7 is a block diagram of a signal generation unit for generating a primary color signal, and the signal generation unit illustrated in FIG. 6 forms a part of a component of the signal source 1 illustrated in FIG. In FIG. 6, 27 to 29 are input terminals for simultaneous signals of three primary color signals, and 19 is an output terminal for a frame sequential signal of three primary color signals.
The terminal 27 described above is supplied with the red primary color signal (R signal) shown in each of FIGS. 7 to 10 (c), and the terminal 28 described above with reference to FIGS. The green primary color signal (G signal) shown in each (d) of each drawing in FIG. 10 is supplied, and the terminal 29 is connected to each (e) in each of the above FIGS. 7 to 10. The illustrated blue primary color signal (B signal) is supplied.

The R signal supplied to the terminal 27 is
In response to the switching operation of the signal switch 30, the R signal for each vertical scanning period is sequentially and alternately alternately transmitted via the lines 35 and 38 to the storage device 4.
1 and 44, and the G signal supplied to the terminal 28 described above is supplied to the line 3 according to the switching operation of the signal switch 31.
The G signals for each vertical scanning period are sequentially and alternately supplied to the storage devices 42 and 45 via the signal switches 6 and 39, and the B signal supplied to the terminal 29 is changed according to the switching operation of the signal switch 32. Through the lines 37 and 40 for each vertical scanning period.
The signals are sequentially and alternately supplied to the storage devices 43 and 46. In the following description, for the sake of simplicity, the image signal stored in each of the storage devices 41 to 46 is an image signal having a time length of one vertical scanning period from the beginning of a vertical blanking period in a sequential vertical scanning period. It is supposed to be.

The above-mentioned storage devices 41 to 46 include:
For example, a frame memory can be used. In the signal switching operation in each of the signal switches 30 to 32, the switching control signal generated in the write / read control unit 4 is supplied via lines 47 to 49. It is done by doing. In the write / read control unit 4, a switching control signal generated based on a periodic signal such as a direct / direct synchronization signal of an image signal supplied from the input terminal 26 is transmitted via the lines 47 to 49 as described above. To the respective signal switches 30 to 32, to the signal switch 18 via the line 14, or to write / read control signals to / from the storage devices 41 to 46 via the lines 50 to 55. Supply or wire 23
Or a control signal is supplied to the address signal generator 5 via the. The address signal generated by the address signal generator 5 is supplied to each storage device 41 via address supply lines 56 to 61.
~ 46. The image signals read from the storage devices 41 to 46 are supplied to the signal switch 18 via the transmission lines 62 to 67, and the image signal output from the signal switch 18 is amplitude-controlled by the output adjuster 69. Is adjusted and supplied to the light emitting element array REA in FIG. 5 via the output terminal 19.

The plane-sequential three primary color signals shown in (f) in each of FIGS. 7 to 10 are obtained as shown in (g) in each of FIGS. 7 to 10. These are plane-sequential three primary color signals used to generate optical information for performing sub-scanning by the oscillating reflecting mirror Mg having various displacement characteristics.
Here, the simultaneous signals of the three primary color signals shown in (c) to (e) in FIGS. 7 to 10 are supplied to the signal generator shown in FIG. The simultaneous signal is subjected to time axis compression and other signal processing, and FIG.
(F) of each figure required to generate optical information in which sub-scanning is performed by the oscillating reflecting mirror Mg having displacement characteristics as shown in each figure (g) of each figure. The description of the operation of the signal generation unit of FIG. 5 when generating the three primary color signals of the field sequential (field sequential) as shown in FIG. 7 as an example, as shown in FIG. An oscillating reflecting mirror Mg having oscillating characteristics such that the forward turning period and the backward turning period are the same is used, and the oscillating reflecting mirror Mg has its forward turning operation period and backward turning operation period. In each period with
The three primary color signals of the frame sequential (field sequential) as shown in FIG. 7 (f) used for generating the optical information to be sub-scanned are respectively shown in FIG. 7 (c) to (e).
, The time axis compression,
The operation of the signal generation unit shown in FIG. 5 when the signal is generated by performing other signal processing will be described below.

The signal switch 30 to which the R signal is supplied via the terminal 27 performs a switching operation according to the switching control signal supplied from the write / read control unit 4 via the line 47, and outputs one vertical signal of the R signal. Image signals for each time length of the scanning period are sequentially and alternately supplied to the storage devices 41 and 44 via the lines 35 and 38. The storage devices 41 and 44 are provided with a write control signal or a read control signal supplied from the write / read control unit 4 via lines 50 and 53 and an address signal generation unit 5 via address supply lines 56 and 59, respectively. One storage device 41 according to the supplied address signal.
(Or 44) is in a state of performing a storage operation for one vertical scanning period, the other storage device 44 (or 41) is in a state of performing a reading operation for one vertical scanning period, and so on. The writing operation and the reading operation are sequentially and alternately performed. Then, the period of the clock signal at the time of the read operation in the storage device 41 (or 44) is set to １ ／ of the period of the clock signal at the time of the write operation, and the data is read from the storage device 41 (or 44). The R signal of the frame-sequential three primary color signals is a signal in which the time axis compression of the R signal of the simultaneous signal supplied to the input terminal 27 is performed by １ ／.

As described above, among the three primary color signals supplied as the simultaneous signals to the terminals 27 to 29, the R signal shown in FIG. 7C supplied to the terminal 27 is stored. Surface-sequential 3 sequentially read from the storage devices 41 and 44
The R signal in the primary color signal is supplied to the terminal 27 in FIG.
The signals F1R → F2R → F3R... In one successive vertical scanning period of the R signal shown in FIG. At the same time, the state of the arrangement of the signals in the R signals in the successive vertical scanning periods on the time axis is inverted every vertical scanning period. The above-mentioned points are obtained by combining the R signal of one vertical scanning period to which an odd field number is assigned in the arrangement of the three primary color signals of the frame sequential shown in FIG. It can be easily known from the positional relationship between α and β shown in the R signal in one vertical scanning period to which the field number is assigned, respectively.

The R signal Fo of the plane-sequential three primary color signals sequentially read out from the storage devices 41 and 44 in which the R signal shown in FIG. 7C supplied to the terminal 27 is stored.
R →... F1R →... F2R →... F3R → are supplied to the signal switch 18 via the lines 62 and 65 and, as described above, the switching control supplied from the write / read control unit 4 via the line 14. The R signal in the above-described three-color primary color signals that have passed through the signal switch 18 in which the switching operation is performed according to the signal is:
After the amplitude is adjusted by the output adjuster 69, the output is supplied to the light emitting element array REA via the output terminal 19. By the way, the signal arrangement of only the R signal, that is, the signal arrangement shown as FoR →... F1R →... F2R →. FoR shown in (f)
→ FoG → FoB → F1R → F1G → F1B → F2R → F2G
This corresponds to a signal arrangement in which only the R signal in the signal arrangement of → F2B → F3R → F3G → F3B → is extracted.

The description so far is based on the R signal shown in FIG. 7C supplied to the terminal 27 among the three primary color signals supplied to the terminals 27 to 29 as a simultaneous signal.
It is sequentially read out after being stored in the storage devices 41 and 44, and is subjected to signal processing until it is finally supplied from the output terminal 19 to the light-emitting element array REA as an R signal of three-color primary color signals. Came, but terminal 27
Of the three primary color signals supplied as simultaneous signals to
Signal processing performed on the G signal shown in FIG. 7D supplied to the terminal 28 using the storage devices 42 and 45, the signal switch 18, the output adjuster 69, and the like, and the terminals 27 to 29 Among the three primary color signals supplied as simultaneous signals, the storage devices 43 and 46 and the signal switch 18 for the B signal shown in FIG.
And signal processing performed using the output adjuster 69, etc.
The processing is performed in the same manner as the signal processing described for the R signal.

As a result, with respect to the input terminals 27 to 29 of the signal generating section illustrated in FIG. 6, each of the three primary color signals of the simultaneous signal illustrated in FIGS. When the primary color signals are supplied, the signal arrangement of the primary color signals in one vertical scanning period in each of three plane-sequential primary color signals output from the output terminal 19 of the signal generation unit illustrated in FIG. As shown in f), FoR → FoG → FoB → F1
R → F1G → F1B → F2R → F2G → F2B → F3R → F3
The signal arrangement is G → F3B →. FIG. 7 as described above
(F) signal arrangement FoR → FoG → FoB → F1
R → F1G → F1B → F2R → F2G → F2B → F3R → F3
In G →, the state of the arrangement of the signals in the primary color signals in the successive vertical scanning periods on the time axis is inverted every single vertical scanning period. Can be easily known from the positional relationship between α and β shown in each of the three primary color signals of the frame sequential shown in FIG. 7 (f).

If the displacement of the oscillating reflector Mg on the time axis during the oscillating operation of the oscillating reflector Mg is non-linear, the above-mentioned oscillating reflector Mg on the time axis is distorted. Corresponding to the displacement non-linearity, the shape of the displayed image is distorted in the sub-scanning direction. For example, as shown in FIG. 7 (g), the mode of displacement of the oscillating reflector Mg on the time axis is such that the rotation speed of the oscillating reflector Mg changes sinusoidally on the time axis. (In a case where a resonance type is used as the oscillating reflector Mg, the speed change of the oscillating reflector Mg on the time axis is sinusoidal on the time axis). The state of displacement of the dynamic reflecting mirror Mg on the time axis is, of course, non-linear. However, even if the displacement of the oscillating reflector Mg on the time axis during the swinging operation of the oscillating reflector Mg is non-linear, as described above, By changing the time at which the optical information is supplied to the oscillating reflecting mirror Mg in correspondence with the speed change mode in the above, it is possible to prevent the image shape in the sub-scanning direction in the display image from being distorted. This can be achieved very easily. That is, as described above, changing the time at which the optical information is supplied to the oscillating reflecting mirror Mg in accordance with the nonlinearity of the displacement on the time axis of the oscillating reflecting mirror Mg is not shown in FIG. Each of the primary color signals in the three-primary color signals in the frame sequence is read from the storage devices 41 to 46 which store the simultaneous signals of the three primary color signals shown in (c) to (e) in each of FIGS. This can be realized by changing the readout speed at the time of output in correspondence with the above-described speed change mode of the oscillating reflecting mirror Mg on the time axis.

However, as described above, in correspondence with the non-linearity of the displacement of the oscillating reflector Mg on the time axis during the swinging operation of the oscillating reflector Mg, the memory devices 41 to 46 perform the frame sequential operation. The sub-scanning is performed by the oscillating reflecting mirror Mg by changing the reading speed at the time of reading each primary color signal of the three primary color signals in accordance with the above-described manner of the speed change on the time axis of the oscillating reflecting mirror Mg. Oscillating reflector Mg for optical information
In the case where the time point of the supply to the storage device is changed, the light intensity of the optical information is changed in correspondence with the change of the reading speed when reading each primary color signal of the three primary color signals from the storage devices 41 to 46 described above. Causes shading in the display image due to the change in the brightness. However, the problem that the shading occurs in the display image due to the above-described causes corresponds to the change in the speed of the oscillating reflecting mirror Mg on the time axis. The amplitude of each primary color signal in the field sequential three primary color signals read out from the storage devices 41 to 46 in accordance with the reading speed of each primary color signal in the field sequential three primary color signals from the storage devices 41 to 46 being changed. Can be changed by supplying an amplitude control signal from the read / write control unit 4 via a line 68 to an output adjuster 69 shown in FIG. It can be.

The description of the operation example of the signal generating unit illustrated in FIG. 6 performed so far with reference to FIG. 7 will be given in the time axis of the oscillating reflecting mirror Mg shown in FIG. In the case where the swing mode described above is as shown in FIG. 7 (g) in which the forward and backward rotation operation periods of the swing reflection mirror Mg are the same, the oscillation reflection is performed. In each of the forward and backward rotation periods of the mirror Mg, sub-scanning of optical information is performed by a signal of one vertical scanning period of each primary color signal of three consecutive primary color signals in the frame sequential. This is related to signal generation in the case of causing the oscillation reflecting mirror Mg shown in (g) of FIG.
The period g is twice as long as the vertical scanning period of each primary color signal in the three sequential primary color signals on which sub-scanning of optical information is performed.

FIG. 10 (f) shows a case where the mode of rotational displacement of the oscillating reflecting mirror Mg on the time axis is the same as that of FIG. 7 (g) shown in FIG. 10 (g). In the case where the sub-scanning of the optical information in one vertical scanning period of each of the primary color signals in the field sequential three primary color signals is performed only during the forward turning operation of the dynamic reflecting mirror Mg, Although the arrangement state is illustrated, each of the primary color signals in the three sequential primary color signals shown in FIG. 10F corresponds to the reciprocating rotation period of the oscillating reflecting mirror Mg. Is shifted on the time axis as illustrated in (g) of FIG. 10 for some reason, the simultaneous signals of the three primary color signals illustrated in (c) to (e) of FIG. Stored storage devices 41-46
3 shows a state in which the reading speed at the time of reading out each primary color signal in the three sequential primary color signals is changed corresponding to the fluctuation in the reciprocating rotation period of the oscillating reflecting mirror Mg. ing. As described above, by changing the reading speed at the time of reading out each primary color signal of the three primary color signals in the frame sequence in accordance with the fluctuation in the time of the reciprocating rotation of the oscillating reflecting mirror Mg, the displayed image is changed. Can be free from shape distortion.

Further, the light intensity of the optical information changes in accordance with the change of the reading speed when reading each primary color signal of the three sequential primary colors from the storage devices 41 to 46,
The storage devices 41 to 46 change the brightness unevenness (shading) generated in the display image in accordance with the speed change mode of the oscillating reflecting mirror Mg on the time axis.
In accordance with the reading speed of each primary color signal in the three sequential color signals from the memory, the amplitude of each primary color signal in the three primary color signals read from the storage devices 41 to 46 can be changed. As described above, the problem can be solved by supplying the amplitude control signal from the write / read controller 4 to the output adjuster 69 shown in FIG.

FIGS. 8 and 9 show the sub-information of the optical information by the signal in one vertical scanning period of each primary color signal of the three sequential primary colors only during each forward rotation of the oscillating reflecting mirror Mg. FIG. 8 is a diagram for explaining signal processing when scanning is performed. FIG. 8 (g) shows an oscillating reflecting mirror Mg used for sub-scanning of optical information. As described above, FIG. 9 is an explanatory view of an ideal operation state in which reciprocating rotation is performed at a constant repetition cycle. FIG. 9 is a diagram illustrating a swing reflection mirror Mg used for sub-scanning of optical information. FIG. 10 is a diagram for explaining a case where the image is shaken for some reason on the time axis as shown in FIG. 9 (g). As shown in FIG. 8 (g), when the oscillating reflecting mirror Mg is performing an ideal oscillating motion at a constant repetition period, the oscillating mirror Mg shown in FIG. 8 (c) to (e). Storage devices 41 to 4 storing the simultaneous signals of the three primary color signals shown
From No. 6, it is possible to obtain a display image free from shape distortion by always keeping the reading speed when reading each primary color signal of the three sequential primary color signals constant, and to obtain a display image with no brightness. No shading occurs.

However, FIG. 9 shows the case where the reciprocating rotation operation period of the oscillating reflecting mirror Mg fluctuates on the time axis as illustrated in FIG. 9G for some reason. of
The read speed at which each primary color signal in the three-primary color signals in the frame sequence is read from the storage devices 41 to 46 storing the simultaneous signals of the three primary color signals shown in FIGS. This figure shows a state in which the reflection mirror Mg is changed corresponding to the fluctuation on the time of the reciprocating rotation operation period. As described above, in response to the fluctuation in the time of the reciprocating rotation of the oscillating reflecting mirror Mg, the reading speed at the time of reading each primary color signal of the three primary color signals in the frame sequential is changed, and the frame sequential is performed. 9 shows a case where each of the primary color signals in the three primary color signals shown in FIG. 9 is in the state shown in FIG.

Also in the case of FIG. 9 described above, the light intensity of the optical information corresponds to the variation of the reading speed when each primary color signal of the three primary color signals is read from the storage devices 41 to 46 in the frame sequence. The brightness unevenness (shading) that occurs in the display image due to the change is changed in accordance with the manner in which the speed of the oscillating mirror Mg changes on the time axis. In accordance with the reading speed of each primary color signal in the primary color signals, the amplitude of each primary color signal in the three sequential primary color signals read from the storage devices 41 to 46 can be changed.
It is of course possible to solve the problem by supplying an amplitude control signal from the read / write control unit 4 via the line 68 to the output adjuster 69 shown in FIG.

[0059]

As is apparent from the above description, the oscillating reflecting mirror performs reciprocating rotation at an oscillating cycle corresponding to the vertical scanning cycle of the original image signal to be displayed. Is set to be larger than the vertical blanking period of the original image signal to be displayed, and the return operation time of the oscillating reflecting mirror is increased. Then, an image signal is generated by performing time-axis compression on the original image signal so that the portion of the image signal during the period excluding the vertical retrace period falls within the working time of the oscillating reflecting mirror, which is shortened in accordance with the above. Using the image signal, the optical information is generated linearly aligned in a specific direction in a predetermined direction, and the optical information is transmitted to the oscillating reflector during the forward rotation operation in the oscillating reflector. The vertical scanning period of the original image signal that is given or displayed Set the return rotation time of the oscillating mirror, which performs reciprocating rotation in a corresponding oscillating cycle, to be longer than the vertical blanking period of the original image signal to be displayed. In addition, all the image signals during the period excluding the vertical retrace period fall within the forward rotation time of the oscillating reflector, which is shortened with the increase of the backward rotation time of the oscillating reflector. An image signal obtained by performing time axis compression on the original image signal as described above is used to generate light information linearly arranged in a specific direction in a predetermined direction by using the image signal, and The information is given to the oscillating reflector during the operation of the oscillating reflector, and the forward and backward rotation of the oscillating reflector during the operation time of the oscillating reflector during the backward rotation. All the same image signals as those used for display within the operation time Generate an image signal obtained by performing time axis compression on the image signal, generate light information linearly arranged in a direction opposite to a specific direction in a predetermined direction by the image signal, and generate the light information. It is given to the oscillating reflector during the backward turning operation of the oscillating reflector, and the forward turning operation time and the backward turning operation time of the oscillating reflector are respectively displayed. It is set to be equal to the vertical scanning period of the original image signal, and a direction predetermined by the image signal of the n-th vertical scanning period in the original image signal within the forward and backward operation time of the oscillating reflecting mirror. , The optical information is linearly arranged in a specific direction, and the optical information is given to the oscillating reflector during the turning operation of the oscillating reflector, and the oscillating reflector is rotated backward. Within each working time, the (n + 1) th vertical in the original image signal According to the image signal of the scanning period, light information linearly arranged in a direction opposite to a specific direction in a predetermined direction is generated, and the light information is generated during the backward rotation operation period in the oscillating reflecting mirror. When the image is given to the oscillating reflector and a color image is displayed by image signals of three primary colors in a frame sequence, the oscillating reflector is reciprocally rotated at a cycle twice as long as the vertical scanning cycle of each primary color signal. In this case, the optical information based on the image signal of each primary color, which is arranged sequentially on the time axis, for each vertical scanning period is deflected during the forward rotation of the oscillating reflecting mirror. In such a case, light information that is linearly arranged in a specific direction in a predetermined direction based on the image information is generated and supplied to the oscillating reflector, while the light information is continuously arranged on the time axis. Image signals for each vertical scanning period of the image signal of each primary color in a plane sequence When the optical information is deflected during the forward rotation of the oscillating reflecting mirror, the optical information is generated by linearly arranging the optical information in a direction opposite to the specific direction in the predetermined direction. The distortion of the shape that is given to the oscillating reflector and caused by the non-linearity of the displacement of the oscillating reflector on the time axis corresponds to the non-linearity of the displacement of the oscillating reflector on the time axis. Thus, the time position at which the optical information is given to the oscillating reflector is eliminated by changing the time position at which the optical information is applied to the oscillating reflector as described above so that shading does not occur in the image. The intensity of the optical information supplied to the oscillating reflector is changed in correspondence with the non-linearity of the displacement of the oscillating reflector on the time axis. Without using expensive optical deflectors Using a swinging reflecting mirror having a simple configuration, a display image having no characteristic distortion and brightness without shading, etc., and having good characteristics and a small size can be easily provided. According to this, the above-mentioned conventional problems can be easily solved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a display device of the present invention.

FIG. 2 is a block diagram of a part of a configuration circuit.

FIG. 3 is a block diagram of a part of a configuration circuit.

FIG. 4 is a waveform chart for explaining a configuration principle and an operation principle.

FIG. 5 is a perspective view of an embodiment of the display device of the present invention.

FIG. 6 is a block diagram of a part of a configuration circuit.

FIG. 7 is a waveform chart for explaining a configuration principle and an operation principle.

FIG. 8 is a waveform chart for explaining a configuration principle and an operation principle.

FIG. 9 is a waveform chart for explaining a configuration principle and an operation principle.

FIG. 10 is a waveform chart for explaining a configuration principle and an operation principle.

FIG. 11 is a perspective view of an embodiment of a conventional display device.

FIG. 12 is a diagram illustrating a configuration example of a light-light conversion element.

[Explanation of symbols]

REA: light emitting element array, Mg: oscillating reflector, SLM ...
Light-to-light conversion element, LS: Read light source, PBS: Polarizing beam splitter, Lp: Projection lens, S: Screen, 1: Signal source, 2: Control unit, 4: Write / read control unit, 5: Address signal generation Part, 7, 18, 30-32 ...
Signal switch, 10, 11, 41 to 46 ... storage device, 27
.About.29... Input terminals for simultaneous signals of three primary color signals, 30.about.32
... Signal switchers, 41-46 ... Storage devices, 69 ... Output adjusters,

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Fushiko Tatsumi 3-12-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Within (72) Inventor Tatsusaku Takahashi 3-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Inside Japan Victor Co., Ltd. (72) Inventor Hiroyuki Bonide 3-12 Moriyacho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Inside (72) Inventor Tsutomu Matsumura 3--12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Inside Victor Company of Japan

Claims (6)

(57) [Claims] 1. An oscillating reflector for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information. In a display device in which the deflected light is made to enter a light-to-light conversion element configured to include at least a photoconductive layer member and a light modulation material layer member between two electrodes, The reciprocating operation time of the oscillating reflecting mirror, which performs reciprocating rotation at the oscillating cycle corresponding to the vertical scanning cycle of the original image signal, is the time of the original image signal being displayed. The vertical retrace is set to be longer than the vertical blanking period, and the vertical retrace is performed during the forward rotation and the operation time of the oscillating reflector, which is shortened with the increase of the backward rotation and the operation time of the oscillating reflector. Original image signal so that the portion of the image signal during the period excluding the period fits Generates light information linearly arranged in a specific direction in the above-mentioned predetermined direction by the image signal subjected to the time axis compression, and outputs the light information during the forward and backward rotation of the oscillating reflector. A display device provided to a swinging reflector. 2. An oscillating reflector for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information, wherein the oscillating reflector is used to deflect the optical information. In a display device in which the deflected light is made to enter a light-to-light conversion element configured to include at least a photoconductive layer member and a light modulation material layer member between two electrodes, The reciprocating operation time of the oscillating reflecting mirror, which performs reciprocating rotation at the oscillating cycle corresponding to the vertical scanning cycle of the original image signal, is the time of the original image signal being displayed. It is set to be larger than the vertical blanking period, and the vertical return is made within the forward rotation and operation time of the oscillating reflector, which is shortened with the increase of the backward rotation and operation time of the oscillating reflector. The original image signal is stored so that all of the image The optical information which is linearly arranged in a specific direction in the above-mentioned predetermined direction is generated by the image signal which has been subjected to the time axis compression for the signal, and the optical information is forward-rotated by the oscillating reflecting mirror. The same signal is given to the oscillating reflector during the period, and the same as the image signal used for display within the forward oscillating time of the oscillating reflector during the backward rotating time of the oscillating reflecting mirror. An image signal obtained by performing time-axis compression on the original image signal so that all of the image signals can be accommodated generates light information linearly arranged in a direction opposite to the specific direction in the above-described predetermined direction. And a display device for providing the optical information to the oscillating reflector during the backward rotation operation of the oscillating reflector. 3. An oscillating reflector for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the array of optical information, wherein the oscillating reflector is used to deflect the optical information. The display device, wherein the deflected light is caused to enter a light-light conversion element including at least a photoconductive layer member and a light modulation material layer member between two electrodes, The forward rotation time and the backward rotation time of the reflecting mirror are set to be equal to the vertical scanning period of the original image signal to be displayed. Within the working time, n in the original image signal
The optical information that is linearly arranged in a specific direction in a predetermined direction is generated by the image signal of the vertical scanning period, and the optical information is reflected by the oscillating reflecting mirror during the forward rotation and the backward rotation. To the mirror, and in the reverse rotation time of the oscillating reflecting mirror, by the image signal of the (n + 1) th vertical scanning period in the original image signal, in the opposite direction to the specific direction in the predetermined direction. A display device that generates optical information linearly aligned in a direction and gives the optical information to the oscillating reflector during the backward rotation of the oscillating reflector. 4. An oscillating reflecting mirror for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information, wherein the oscillating reflecting mirror is provided. In a display device in which deflected light is made to enter a light-to-light conversion element configured to include at least a photoconductive layer member and a light modulating material layer member between two electrodes, The oscillating reflecting mirror is reciprocated and rotated at a period twice as long as the vertical scanning period of one primary color signal in the primary color image signal, and each of the plane-sequential primary colors arranged continuously on the time axis. When optical information based on the image signal for each vertical scanning period of the image signal is deflected during the forward rotation of the oscillating reflecting mirror, a straight line is formed in a specific direction in a direction predetermined by the image information. To generate optical information that is lined up In the case where the optical information based on the image signal for each vertical scanning period of the image signal of each of the primary colors sequentially arranged on the intermediate axis is deflected at the time of the reciprocating operation of the oscillating reflecting mirror, A display device configured to generate optical information linearly arranged in a direction opposite to a specific direction in the predetermined direction, and to provide the optical information to the oscillating reflector. 5. An oscillating reflecting mirror for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information, wherein the oscillating reflecting mirror is used. In a display device in which deflected light is made to enter a light-to-light conversion element configured to include at least a photoconductive layer member and a light modulating material layer member between two electrodes, Means for reciprocatingly rotating the oscillating mirror at a period twice as long as the vertical scanning period of one primary color signal in the primary color image signal, and image distortion due to non-linearity of displacement of the oscillating mirror on the time axis Means for providing optical information to the oscillating reflector at a time position where no oscillating reflection occurs, and shading in the image by associating the light intensity of the optical information with the non-linearity on the time axis of the displacement of the oscillating reflector. Means to change so that it does not occur, The optical information based on the image signal for each vertical scanning period of the plane-sequential image signal of each primary color which is deflected during the forward rotation of the oscillating reflecting mirror has a specific direction in a direction predetermined by the above-described image information. The optical information by the image signal for each vertical scanning period of the plane-sequential image signal of each primary color which is deflected at the time of reciprocating rotation of the oscillating reflecting mirror is obtained in advance as described above. Means for linearly aligning in a direction opposite to a specific direction in a predetermined direction. 6. An oscillating reflector for deflecting optical information linearly arranged in a predetermined direction in a direction orthogonal to the direction of the arrangement of the optical information, wherein the oscillating reflector is provided. In a display device in which deflected light is made to enter a light-to-light conversion element including at least a photoconductive layer member and a light modulation material layer member between two electrodes, vertical scanning of an image signal is performed. Means for rotating the oscillating reflector in a reciprocating manner in accordance with the period, and optical information to the oscillating reflector at a time position where image distortion due to non-linearity on the time axis of displacement of the oscillating reflector is not generated. A display device comprising: means for giving the light intensity of the optical information to the nonlinearity on the time axis of the displacement of the oscillating reflecting mirror so that shading does not occur in the image. .