JP2961217B2 - Color image display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image display device for displaying a color image by disposing a color filter on a display surface of a single-color image display unit such as a monochrome cathode-ray tube.

[0002]

2. Description of the Related Art FIG. 1 is a schematic structural view of a conventional color image display device using a color filter. Single color image display
Numeral 31 is constituted by, for example, a cathode ray tube (hereinafter referred to as CRT), and is provided with a luminance signal Y, a horizontal synchronizing signal H, and a vertical synchronizing signal V to display a monochrome image. A coloring mechanism 32 is disposed on the display surface 31a of the CRT 31 so as to oppose the coloring mechanism 32, as shown in FIG.
It is constituted by a disk-shaped member in which three filters 32a, 32b, and 32c of three colors (G) and blue (B) are continuously and equally arranged around the rotation shaft 13.

[0003] Each color filter 32a, 32b, 32c is a CRT.
The display surfaces 31a of the display 31 are sequentially and selectively opposed to each other.
It is driven to rotate around 13. The rotation detector 14 detects the rotation phase of the coloring mechanism 32 and outputs a rotation synchronization pulse PG. The signal switching section 33 receives the color signals R, G, and B corresponding to the red, green, and blue color filters 32a, 32b, and 32c, and receives one of the color signals R, G, and B for each input of the switching signal 5. One color signal is selected and given to the CRT 31. The rotation drive unit 15 and the signal switching unit 33 are controlled by the control circuit 30, and the control circuit 30 controls the vertical synchronization signal V of the video signal.
And the rotation synchronization pulse PG output from the rotation detector 14, and controls the rotation drive unit 15 and the signal switching unit 33.

Next, the operation of the color image display device will be described. The control circuit 30 drives the rotation drive unit 15 so as to maintain a predetermined phase relationship with the signal obtained by dividing the vertical synchronization signal V by 3 and the rotation synchronization pulse PG from the coloring mechanism 32,
The rotation of the coloring mechanism 32 is controlled in the arrow direction. As a result, the coloring mechanism 32 rotates 1/3 in one field of the video signal input to the control circuit 30. Also, the phase relationship is determined by the vertical synchronization signal V
Red, green, or blue color filter 32a,
If the lower part of 32b, 32c, for example, below the center of the red color filter 32a is set above the CRT 31, the CRT
As the scanning line 31 advances from the upper side to the lower side of the display surface 31a, the red color filter 32a can be rotated so that it is always positioned on the scanning line.

Further, the control circuit 30 inputs a switching signal S to the signal switching section 33 at each time of the vertical synchronizing signal V. Each time the signal is input, the signal switching section 33 causes the respective color signals red (R), green (G), blue. (B), each color filter 32a facing the display surface 31a of the CRT 31;
Control is performed so that signals corresponding to the colors 32b and 32c are given to the CRT 31. Such control operations are shown in FIGS. 3, 4, 5, and 6.
Is achieved as shown in FIG. That is, FIGS. 3 (a) and 4
FIGS. 5 (a), 5 (a) and 6 (a) show the relationship between the rotation phase of the coloring mechanism 32 and the scanning line HL on the display surface 31a of the CRT 31, and FIGS. 3 (b) and 3 (b). 4 (b), 5 (b), 6 (b)
FIG. 3A shows the switching state of the signal switching unit 33 corresponding to FIGS. 3A, 4A, 5A, and 6A. 3, 4, 5, and 6 show the state of red display and the state at the time of switching from red display to green display, the same applies to other green display and blue display. .

FIGS. 3, 4, 5, and 6
As is clear from the above, the accuracy of the rotation phase of the coloring mechanism 32 is
It is sufficient that the scanning line HL of the CRT 31 falls within the area of each color filter 32a, 32b, 32c, and high precision is not required. In this way, during the period when the coloring mechanism 32 makes one rotation, the CRT 31 becomes red.
(R), green (G), and blue (B) color signals are sequentially displayed one field at a time, and the red, green, and blue color filters 32a, 32 of the coloring mechanism 32 are displayed.
Since b and 32c are also sequentially opposed to the display surface 31a of the CRT 31, one color image colored with three colors is obtained on a screen of three fields for one rotation of the coloring mechanism 32.

[0007]

The above-mentioned conventional color image display device requires three fields of video signals to obtain one color image, and has a pattern of components close to the primary colors of red, green and blue. Since only one of the three fields is displayed in the part, the displayed image emits light only once in the three fields, causing flickering and making the displayed image difficult to see. There's a problem.

For this reason, a shadow mask type color CRT or a method of synthesizing images of three CRTs with a dichroic mirror has been developed. In the former, three colors are separated into the same CRT. Single color CR for display
Resolution is lower than T. The latter, on the other hand, requires the positioning of the three CRTs with high accuracy, requires many man-hours, and requires the use of three CRTs and a high-precision dichroic mirror, resulting in an expensive color image display device. There is.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an inexpensive color image display device having a high resolution without causing flicker by using a monochrome image display unit and a coloring mechanism.

[0010]

According to the present invention, there is provided a color image display apparatus comprising: a color signal separating circuit for separating each color signal from a composite video signal; a plurality of storage units for writing the separated color signals; A control unit for reading out the color signals from the storage unit at N times the speed and sequentially giving the read out color signals to the image display unit, and comprising three images of red, green and blue within one field cycle Is configured to be displayed.

[0011]

This color image display device separates each color signal from the input composite video signal and writes it into a plurality of storage units.
The color signals are sequentially read from the storage unit during one field period and applied to the image display unit, and three color images are displayed on the image display unit within one field period. As a result, flicker does not occur, and a high-resolution color image can be displayed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 7 is a block diagram showing a main part configuration of the color image display device according to the present invention. The composite video signal CV is input to the color signal separation circuit 1 and the synchronization separation circuit 18. The red (R), green (G), and blue (B) color signals separated by the color signal separation circuit 1 are input to the amplifiers 2, 3, and 4, respectively. The amplifiers 2, 3, and 4 adjust the magnitude of each color signal according to, for example, the transmittance of each color filter described later and the degree of each color component included in the image display unit, and also adjust the sampling position of each color signal. You can adjust the time. The color signals output from the amplifiers 2, 3, and 4 are input to the signal switch 5. Signal switch 5 is red (R), green
(G) and blue (B) color signals are time-division multiplexed.

The red (R), time-division multiplexed by the signal switch 5,
The green (G) and blue (B) color signals are input to the analog / digital converter 6, and the analog / digital converted digital signal is stored in a storage unit including, for example, a dual-port memory in which data can be written and read asynchronously. 7, 8, and 9 are provided to data input terminals MID1, MID2, and MID3. Each color data read from the data output terminals MOD1, MOD2, MOD3 of the storage units 7, 8, 9 is input to the digital / analog converter 10.

The digital / analog converter 10 converts the digital / analog
The luminance signal Y, which is an analog signal converted into an analog signal, is supplied to an image display unit (hereinafter, referred to as a CRT) 11 composed of a cathode ray tube for displaying a monochrome image in black and white. On the display surface side of the CRT 11, a red (R), green
(G) and blue (B) color filters 1 with equal color filters
2 are arranged. As shown in FIG. 12, the coloring mechanism 12 includes six red (R), green (G), and blue (B) color filters, two for each color. ,
When three color filters are used, a portion that is tripled is rotated by half of that.

The coloring mechanism 12 is rotatably driven by a rotation drive unit 15 composed of a drive motor. A rotation frequency pulse FG generated by the rotation drive unit 15 is input to a drive control unit 17. The rotation synchronization pulse PG output from the rotation phase detector 14 that detects the rotation phase of the rotation shaft 13 of the coloring mechanism 12 is input to the drive control unit 17. Drive signal output by drive controller 17
DV is input to the drive amplifier 16, and the rotation drive signal DA output from the drive amplifier 16 is provided to the rotation drive unit 15.

The horizontal synchronizing signal H separated from the composite video signal CV by the synchronizing separation circuit 18 is supplied to a phase comparator 19 constituting a PLL circuit, frequency conversion circuits 22 and 23, and an analog / digital converter control circuit 26. , Storage unit control circuit 27, digital /
And an analog converter control circuit 28. The vertical synchronization signal V separated by the synchronization separation circuit 18 is supplied to the drive control unit 17.
, A frequency conversion circuit 23, an analog / digital converter control circuit 26, a storage unit control circuit 27, and a digital / analog converter control circuit 28.

The output signal of the comparator 19 is applied to an oscillator 21 composed of a voltage-controlled oscillator via a filter 20 for smoothing the output signal. The reference clock CLK output from the oscillator 21 is a frequency divider.
The frequency-divided clock PLLH of the frequency divider 24, which is input to the frequency divider 24 and frequency-divided the reference clock, is supplied to the phase comparator 19. The reference clock CLK supplied to the frequency divider 24 is provided with a switching signal generation circuit 25,
An analog / digital converter control circuit 26, a storage unit control circuit 27, and a digital / analog converter control circuit 28 are provided.

The phase comparator 19 compares the phase of the horizontal synchronizing signal H with the phase of the frequency-divided clock PLLH, and outputs a signal corresponding to the result of the comparison. The frequency conversion circuit 22 outputs the horizontal synchronization signal H, and the frequency conversion circuit 23 outputs the vertical synchronization signal V.
Are converted into signals of 3 times the frequency of × 3H and × 3V, respectively. × 3V is synchronized with the horizontal synchronization signal H
Is output. Output signals of the frequency conversion circuits 22 and 23 are supplied to a storage section control circuit 27, a digital / analog converter control circuit 28, and the image display section 11. The switching signal S output from the switching signal generating circuit 25 is applied to the signal switch 5. The conversion clock ADCK output from the analog / digital converter control circuit 26 is supplied to the analog / digital converter 6.

The write signals output by the storage control circuit 27 are write signal input terminals MICK1, MICK2 of the storages 7, 8, and 9.
, MICK3, read control signal is read signal input terminal MOC
The read enable signal is supplied to the read enable signal input terminals MOE1, MOE2, and MOE3 to K1, MOCK2, and MOCK3. The output enable signal DAE and the conversion clock DACK output from the digital / analog converter control circuit 28 are supplied to the digital / analog converter 10. The control stop signal M output from the drive control unit 17 is supplied to the digital / analog converter control circuit 28.

The frequency conversion circuits 22, 23, the frequency divider 24,
The switching signal generation circuit 25, the analog / digital converter control circuit 26, the storage unit control circuit 27, and the digital / analog converter control circuit 28 constitute a control unit 29 configured by an integrated circuit such as a gate array.

Next, the operation of the thus configured color image display device will be described. The composite video signal is a color signal separation circuit 1
Thus, the signals are separated into red (R), green (G), and blue (B) color signals. The separated color signals are amplified by the amplifiers 2, 3, and 4 to values determined by the transmittance of each color filter of the coloring mechanism 12 and the amount of each color component contained in the phosphor of the CRT 11, respectively.
In order to make the sampling position of each color signal the same, the respective delay amounts are adjusted as shown in FIGS. 8 (a), 8 (b) and 8 (c). FIG.
(a), (b), and (c) use the same signal for each of the red (R), green (G), and blue (B) signals. Green (G) and blue ( B) is delayed. When the output signals of the amplifiers 2, 3, and 4 are switched by the signal switch 5 so as to select each color signal for each 1/3 time of the writing cycle of the storage units 7, 8, and 9, as shown in FIG. A color signal repeated in the order of red (R), green (G), and blue (B) is obtained.

The color signal thus obtained is input from the signal switch 5 to the analog / digital converter 6, where it is converted from analog to digital and converted to analog / digital.
The digital signal, which is a color signal, output by, is as shown in FIG. 8 (e), and is input to the storage units 7, 8, and 9. Storage units 7, 8,
In step 9, the input digital signal is written with a write signal from the storage section control circuit 27 shifted by 1/3 of the write cycle. Thus, each color signal is written to each of the storage units 7, 8, and 9 individually. This is shown in FIG.

FIG. 9A shows a sampling point of each color signal in the composite video signal, and FIG. 9B shows a color signal which is a digital signal output from the analog / digital converter 6. 9 (c), (d), and (e) show the storage units 7, 8,
9 shows write signals applied to write signal input terminals MICK1, MICK2 and MICK3. The storage units 7, 8, and 9 correspond to FIG.
At each rising time of the write signals (c), (d) and (e), a color signal is written as shown in FIG. 9 (b). The color signals written in the storage units 7, 8, and 9 are synchronized with the vertical synchronizing signal V at three times the writing speed by a read signal having a frequency three times that of the write signal output from the storage unit control circuit 27. And read. That is, a color signal for one field is read out in 1/3 field time. As a result, each color signal is sequentially read out in a predetermined order, for example, in the order of green (G), blue (B), and red (R) in the time of 1/3 field.

FIG. 10 shows a read enable signal which enables reading of the vertical synchronizing signal V and the color signal. Read enable signal input terminals MOE1 and MOE1 of storage units 7, 8, and 9
The read enable signal given to MOE2 and MOE3 is shown in FIG.
As shown in FIGS. 10 (c) and 10 (d), the level of the vertical synchronization signal V shown in FIG. 10 (a) becomes L level sequentially for 1/3 of the period, and the read enable signal input terminals MOE1, MOE2 and MOE3 are set. During the L level, color signals can be read from the storage units 7, 8, and 9. By controlling the period during which the color signals can be read out, the digital signals as the respective color signals are read from the storage units 7, 8, and 9 in the order of green (G), blue (B), and red (R).

At this time, × 3V is synchronized with the horizontal synchronizing signal.
The color signal of the same field as when writing.
The interlacing is performed by shifting the reading for each field . FIG. 11 shows this interlacing. The composite video signal is usually sent alternately every field so that the odd and even fields of F1 and F2 constitute one screen (F1 + F2) as shown in FIG. 11 (d). I do. FIG. 11A shows a horizontal synchronizing signal H, and FIGS. 11B and 11C show timings of horizontal scanning for reading color signals from the storage units 7, 8, and 9. The color signals of the odd field F1 shown in FIG. 11D are stored in the storage units 7, 8, and 9 in synchronization with the horizontal synchronization signal H shown in FIG. writing,
Reading is performed from the storage units 7, 8, and 9 at three times the speed of writing.
At the time of reading, color signals are read from the storage units 7, 8, and 9 at the timing of T1 shown in FIG. In this way, as shown in FIG. 11 (e), each color signal is read out in the order of green (G), blue (B), red (R) during the period of the odd field F1 for writing the color signal.

The color signal of the even field F2 shown in FIG. 11 (e) is written into the storage units 7, 8, and 9 in synchronization with the horizontal synchronization signal H following the vertical synchronization signal V, and is three times the writing speed. Is read at the speed of Then, at the time of reading, reading is performed at the timing of T2 shown in FIG. Then, as in the case of the even field F2 shown in FIG. 11D, the color signals are read out in the order of green (G), blue (B), and red (R) during one writing field. In this manner, the green (G), blue (B), and red (R) color signals are read out, and the odd field F1 and the even field are read.
Green (G), blue (B), and red (R) color signals are read out from both fields of F2 in the same manner as in the normal interlace. The read digital signals as the respective color signals are converted into analog signals by the digital / analog converter 10 and applied to the CRT 11 to display an image on its display surface.

On the other hand, the rotation drive unit 15 is controlled by a drive control unit 17 via a drive amplifier 16 to rotate the coloring mechanism 12 together with the rotation shaft 13, for example, green (G), blue (B), red
The color filters 12a, 12b, 12c... 12f face the display surface of the CRT 11 in the order of (R) and pass through the display surface once in one field. The rotation synchronization pulse PG output from the rotation phase detector 14 that detects the position of the rotation shaft 13 by previously defining the rotation shaft 13 and the position of the color filter of the coloring mechanism 12 attached thereto.
The position of the color filters 12a, 12b, 12c... 12f is determined, and the rotation drive unit 15 is controlled so as to keep the phase of the rotation synchronization pulse PG and the vertical synchronization signal V constant. At this time, the drive control unit 17 controls the drive amplifier 16 so that the rotation drive unit 15 rotates at a predetermined speed, that is, the value of the rotation frequency pulse FG of the rotation drive unit 15 does not change. Then, the rotational phase of the red (R) color filter 12a of the coloring mechanism 12 and CR
The relationship between T11 and the scanning line HL is as shown in FIG. 13, FIG. 14, and FIG.

The control unit is controlled based on the vertical synchronizing signal V.
19 outputs a signal that determines the order of each color signal, and the drive control unit 17 determines the position of the color filter from the vertical synchronization signal V. Therefore, the output order of the color signals and the color filter of the coloring mechanism 12
By predetermining the order of 12a, 12b, 12c ... 12f,
The color signals correspond to the color filters of the color signals, respectively. As a result, if it is synchronized with the vertical synchronization signal V,
Since other controls are not required, the control unit 29 and the drive control unit 17 need only perform the respective controls.

The horizontal synchronization signal H separated from the composite video signal CV by the synchronization separation circuit 18 is compared with a reference clock and a signal PLLH divided by a frequency divider 24 by a phase comparator 19, and the phase comparator 19 Is output in a pulse form, and is thus smoothed by the filter 20. The smoothed voltage is applied to the oscillator 21, and the oscillator 21 changes the oscillation frequency according to the output voltage of the filter 20. The control unit 29 is controlled by the reference clock CLK synchronized with the horizontal synchronization signal H output from the oscillator 21.
Are controlled in synchronization with each other. The reference clock CLK synchronized with the horizontal synchronization signal H is a composite video signal CV
Can be sampled at the same time from the horizontal synchronizing signal H. Therefore, in the case of the apparatus of the present invention in which three color signals are temporally combined and displayed, image quality such as color bleeding due to a difference in sample position or display position is obtained. Deterioration is eliminated. Further, since the horizontal synchronizing signals of the NTSC system and the PAL system, which are TV signal systems, have substantially the same period, it is easy to cope with both systems. The output signals of the frequency conversion circuits 22 and 23 are supplied to the CRT 11 to perform horizontal scanning and vertical scanning at three times the speed of the conventional one.

The coloring mechanism 12 arranged in such a manner as to face the display surface of the CRT 11 is rotated by the rotation drive section 15 in synchronization with the vertical synchronization signal V.
The color filters face the display surface of the CRT 11 in the order of blue (B) and red (R), and pass through the display surface once in one field. In addition, since the coloring mechanism 12 is composed of six color filters of two corresponding to each color of green (G), blue (B), and red (R), in order to display an image of one field, The coloring mechanism 12 only needs to make a half turn. For this reason, when the color filter 12 is constituted by three color filters as in the related art, the rotation speed of the coloring mechanism 12 is three times. However, by using the six color filters, the rotation speed of the coloring mechanism 12 is reduced. 1.5 in case
It is good to double. By increasing the number of color filters of the coloring mechanism 12 in this manner, the rotation speed can be reduced, and power consumption and noise can be reduced. Considering the mounting accuracy of the color filters to be mounted on the rotating shaft 13 and the phase tolerance for correcting uneven rotation, it is preferable to use six color filters.

Conventionally, one screen is composed of three fields, but in the present invention, since one screen is composed of one field, a color image free from flicker can be obtained. Also, since the CRT 11 uses a monochromatic cathode ray tube,
A high-resolution display image is obtained.

FIG. 16 is a side view of the coloring mechanism 12, and FIG.
As shown in a perspective view in FIG. 17, a color filter formed in a substantially trapezoidal shape, six color filters 12a, 12b, 12c…
12f can be arranged equally. In this way, the diameter of the coloring mechanism 12 can be reduced, and the size can be reduced. When the coloring mechanism 12 is also rotated, the color filters 12a, 12b... 12f sequentially face the display surface 11a of the CRT 11 one by one. As a result, the same effect as that obtained by forming a disk can be obtained as shown in FIG.

Since a color image is obtained in this manner, it is possible to apply the present invention to a viewfinder of a video camera and to colorize the image. Further, since the image display unit may use the small-sized cathode ray tube which is already used in the current video camera and displays a single color, the resolution of the displayed image does not decrease. This color image display device can be applied not only to a video camera but also to, for example, a television receiver having a relatively small display surface area of an image display section or a light projection type television receiver.

[0034]

As described above, according to the present invention, a color image free from flicker can be displayed by using a single-color image display device . In addition, the use of a monochromatic cathode ray tube provides excellent effects such as obtaining a high-resolution color image.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a conventional color image display device.

FIG. 2 is a front view of a conventional color image display device.

FIG. 3 is an explanatory diagram showing a red display showing a relationship between a rotation phase of a coloring mechanism and a scanning line of an image display unit.

FIG. 4 is an explanatory diagram showing a relationship between a rotation phase of a coloring mechanism and a scanning line of an image display unit for red display.

FIG. 5 is an explanatory diagram illustrating a relationship between a rotation phase of a coloring mechanism and a scanning line of an image display unit when switching from red to green display.

FIG. 6 is an explanatory diagram showing a relationship between a rotation phase of a coloring mechanism and a scanning line of an image display unit for green display.

FIG. 7 is a block diagram illustrating a main configuration of a color image display device according to the present invention.

FIG. 8 shows each color signal, a signal switched by a signal switch, and a digital signal subjected to analog / digital conversion.

FIG. 9 is an explanatory diagram of timing for sampling each color signal.

FIG. 10 is a timing chart of a vertical synchronization signal and a read control signal.

FIG. 11 is an explanatory diagram showing an interlacing operation by reading a color signal from a storage unit;

FIG. 12 is an explanatory diagram showing a relationship between a rotation phase of a coloring mechanism and a scanning line of an image display unit for red display.

FIG. 13 is an explanatory diagram showing the relationship between the rotation phase of the coloring mechanism and the scanning lines of the image display unit for red display.

FIG. 14 is an explanatory diagram showing a relationship between a rotation phase of a coloring mechanism and a scanning line of an image display unit for red display.

FIG. 15 is an explanatory diagram showing the relationship between the rotation phase of the coloring mechanism and the scanning line of the image display unit when switching to green display.

FIG. 16 is a top view showing another embodiment of a coloring mechanism and an arrangement state of an image display unit.

FIG. 17 is a perspective view of a coloring mechanism.

[Explanation of symbols]

 Reference Signs List 1 color signal separation circuit 5 signal switch 6 analog / digital converter 7, 8, 9 storage unit 10 digital / analog converter 11 image display unit 12 coloring mechanism 12a, 12b, 12c ... 12f color filter 14 rotation phase detector 15 Rotation drive unit 16 Drive amplifier 17 Drive control unit 18 Synchronization separation circuit 19 Phase comparator 21 Oscillator 22,23 Frequency conversion circuit 24 Divider 25 Switching signal generation circuit 26 Analog / digital converter control circuit 27 Storage unit control circuit 28 Digital / Analog converter control circuit 29 Control section

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-16482 (JP, A) JP-A-2-154590 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04N 9/43 H04N 11/00-11/24

Claims (8)

(57) [Claims] 1. A luminance signal, an image display unit provided horizontal and vertical sync signals to display a monochrome image, arranged in front of the display surface of the image display unit, a plurality of colors sequentially
A color signal separating circuit that separates a plurality of single color signals from a composite video signal, wherein the color image display device includes a coloring unit that changes by switching next. When the analog / digital converter for converting a digital signal to an analog signal for each color signal corresponding to each color signal, the digital signal included can write, N times (only at the time of write-out write
And a readable plurality of storage units at a rate of N> 1), and a digital / analog converter for converting the digital signals out read from the storage unit into an analog signal for each color signal, based on the vertical synchronizing signal Switch the color of the coloring means
Control means for controlling the analog / digital converter, the storage section, and the digital / analog converter, wherein the control section controls the analog / digital converter. And a frequency conversion circuit for converting the frequencies of the horizontal synchronization signal and the vertical synchronization signal. 2. A luminance signal, a horizontal synchronizing signal and a vertical synchronizing signal.
And an image display unit for displaying a single-color image provided with a signal, and a display surface of the image display unit.
The filter can be rotated continuously evenly around the rotation axis.
A color mechanism for displaying a color image on the display surface.
In an image display device, a color signal for separating a plurality of single color signals from a composite video signal.
Signal separation circuit and a digital signal corresponding to each color signal.
And analog / digital converter for converting the barrel signals, writing said digital signals, at the time of writing N times (only
A plurality of storage units that can be read at a speed of N> 1), and a digital signal read from the storage unit is analyzed for each color signal.
A digital / analog converter for converting to a log signal, a rotation phase detector for detecting a rotation phase of the coloring mechanism, and a coloring mechanism for driving the coloring mechanism to rotate the color filter on the display surface.
The rotation drive unit, which sequentially faces the rotation phase detector, has the same phase as the output of the rotation phase detector and the vertical synchronization signal.
Drive system that controls the rotation speed of the rotary drive so that
The horizontal sync signal and vertical sync signal are separated from the control unit and the composite video signal.
The analog / digital converter, the storage unit, and the digital
Control means for controlling the digital / analog converter, and a frequency for converting the frequencies of the horizontal synchronization signal and the vertical synchronization signal.
A color image display device comprising a number conversion circuit . 3. Each of the color signals separated by the color signal separation circuit is
An amplifier for amplifying and delaying each signal, a signal switch for selectively switching the output of the amplifier, and an analog for converting the output of the signal switch to a digital signal
A log / digital converter is provided, and the timing of writing to the storage unit is determined by the signal switcher.
Color image display apparatus according to claim 1 or 2, characterized in that you have a configuration that control according to the color signal. 4. A vertical synchronizing signal whose frequency has been converted is horizontally
Odd number or color signal of the color signal
Is horizontal every other field, corresponding to the even field
One half cycle (1 / 2N cycle) of the 1 / N cycle of the synchronization signal
By reading by al, claims 1, characterized in that you have <br/> configured to perform interlacing 3 Noise
The color image display device according to any one of the above. 5. A coloring mechanism is separated by a color signal separating circuit.
The order is determined by a color filter corresponding to the color signal to make one set,
The M groups (where M> 1) are configured as one and equally distributed
So that the rotary drive unit operates at 1 / M speed.
5. The method according to claim 2, wherein
The color image display device according to any one of the above. 6. An apparatus according to claim 1 , wherein each of the signals is determined in an order determined in synchronization with the vertical synchronization signal.
A control unit that controls the color signals to be read from the storage unit , and each color filter is arranged in the same order as the read order of the color signals.
Coloring mechanism and a color filter defined by the coloring mechanism in synchronization with the vertical synchronization signal.
The color image display device according to any one of claims 2 to 5, further comprising a drive control unit configured to control the color image to be opposed to the display surface . 7. A reference clock input to a control means is output.
And a reference clock output by a dividing cycle for dividing the reference clock.
Clock phase and the horizontal sync signal phase from the sync separation circuit.
, A filter for smoothing an output signal from the phase comparator , and a frequency of a reference clock corresponding to an output from the filter.
And an oscillator for changing the frequency of the reference clock in synchronization with the horizontal synchronization signal.
2. The control device according to claim 1, wherein
7. The color image display device according to any one of items 6 to 6. 8. A control means for synchronizing with a vertical synchronizing signal.
Read out each color signal from the storage unit in the order
In synchronization with the direct synchronizing signal, the color signal reading order and coloring
Claims that control so that the switching of the color of the column is the same
Color image display according to any one of 1, 3, and 4
apparatus.