JP2002072966A - Color picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a high optical utilization of a light bulb and downsizing of a device to be compatible with each other in a single board color picture display device. SOLUTION: In the device for displaying a picture in color by guiding each color light in red, green, and blue emitted from a light source 201 to illuminate the light bulb 204 by each color light in a striped form, moreover, continuously moving the striped illumination area, and driving each pixel of the light bulb by a color signal adaptive to the illumination area of each color light, the adjoining areas illuminated with two colors are partly overlapped and the pixels in the overlapped areas 302 are driven by a brightness signal component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a color image display device which performs color display with a single light valve as a light modulating means.

[0002]

2. Description of the Related Art At present, a liquid crystal projector, which is a mainstay of the large-sized video market, enlarges and forms an image on a liquid crystal panel (light valve) on a screen using a light source lamp, a condenser lens, and a projection lens. It is. The systems currently in practical use can be broadly divided into two types: three-plate type and single-plate type.

In the former three-panel type liquid crystal projector, light from a white light source is split into three primary color lights of red, green and blue by a color separation optical system, and the light is modulated by three monochrome liquid crystal panels to produce three primary colors. Are formed respectively.
Thereafter, these images are combined by a color combining optical system and projected on a screen by one projection lens. This method has a high light utilization rate because it can use the entire spectrum of white light from the light source, but requires three liquid crystal panels, a color separation optical system, a color synthesis optical system, and a convergence adjustment mechanism between the liquid crystal panels. Therefore, it is relatively expensive.

On the other hand, the conventional single-panel type liquid crystal projector is compact and inexpensive because the image formed on the liquid crystal panel with the mosaic color filter is simply enlarged and projected on the screen. However,
In this method, of the white light from the light source, a desired color light is obtained by absorbing unnecessary color light in a color filter serving as a color selection means, so that white light incident on the liquid crystal panel is transmitted only by 1/3 or less. (Or reflection), the light utilization is low, and it is difficult to obtain a high-luminance image. Increasing the light source can improve the brightness of the displayed image, but it still has problems with heat generation and light resistance due to light absorption of the color filter, which is a major obstacle to achieving high luminance.

[0005] A display device for achieving a high luminance in a single-panel type is disclosed in Japanese Patent Application Laid-Open No. Hei 4-316296. FIG. 15 shows a schematic configuration of this display device. White light emitted from the light source unit 920 is guided to the color separation optical system 921. The color separation optical system 921 includes dichroic mirrors 921a and 921b and two reflection mirrors 92, as shown in FIG.
1c and 921d. Dichroic mirror 92
1a reflects blue light and transmits green light and red light.
The dichroic mirror 921b reflects red light and transmits green light and blue light. The dichroic mirror 921a and the dichroic mirror 921b intersect with each other. Of the white light from the light source 920, blue light is reflected by the dichroic mirror 921a, reflected by the reflection mirror 921d, and passes through the opening 922b of the illumination unit 922. The red light is reflected by the dichroic mirror 921b, reflected by the reflection mirror 921c, and passes through the opening 922r of the illumination unit 922. The green light is emitted from the dichroic mirrors 921a and 921b.
Through the opening 922 g of the illumination unit 922. Openings 922r, 922g, 922 of the lighting unit 922
b is formed in a band shape (rectangular shape), and red, green, and blue color lights are emitted adjacently from these openings. Lighting unit 92
The band-shaped light beams emitted from the light source 2 pass through a scanning optical system 924 to illuminate a single transmission light valve (display panel) 923 in a band shape. Due to the action of the rotating prism 924a constituting the scanning optical system 924, the red, green, and blue band-shaped light beams scan the light valve 923 in the vertical direction.
When the band-shaped illumination area of a certain color light exceeds the uppermost end of the effective area of the light valve 923, the band-shaped illumination area of the color light reappears at the lowermost end of the effective area of the light valve 923. In this manner, continuous scanning by the red, green, and blue color lights over the entire effective area of the light valve 923 becomes possible. The color light illuminating each row on the light valve 923 changes every moment,
A light valve driving device (not shown) drives each pixel with information corresponding to the illuminated color light. This means that each row of the light valve 923 is driven three times for each field of the video signal to be displayed. The drive signals respectively input to the individual rows correspond to the color information of that part of the image to be displayed. Each color light modulated by the light valve 923 is enlarged and projected by a projection lens 925 on a screen (not shown).

According to such a configuration, since the light from the white light source is separated into three primary colors, it can be used with almost no loss, and the light use efficiency can be increased. Further, since each pixel on the light valve performs red, green and blue display, it is possible to provide a high quality image without color shift which is a problem in the three-plate system described above.

[0007]

However, in the above-described configuration, when each color light from the illumination unit 922 passes through the rotating prism 924a, the light flux is not restricted. The size (rotation radius) of the rotating prism 924a is determined by the illumination unit 92.
The size of the rotating prism 924a needs to be large according to the illumination area of the light emitted from the light source 2 and is large and heavy. Therefore, it has been an obstacle in reducing the size and weight of the device.

In order to reduce the size of the display device, it is necessary to reduce the size of each component of the optical system. For this purpose, a method of reducing the luminous flux area of light incident on the light valve can be considered. However, in order to reduce the luminous flux area, there arise technical problems such as the necessity of using a point light source for the light source and increasing the size of the condensing optical system contradictoryly.

The present invention solves these conventional problems,
A first object is to provide a color image display device in which the size of the device is reduced without reducing the luminous flux area. It is a second object of the present invention to provide a suitable adjustment method of an apparatus for achieving the above object.

[0010]

To achieve the above object, the present invention has the following constitution.

A color image display device according to a first configuration of the present invention includes a light source unit for emitting red, green, and blue color lights, respectively, and modulating incident light in accordance with at least red, green, and blue color signals. An image display panel composed of a large number of pixels to be formed, and each color light from the light source unit forms a strip-shaped illumination region at a different position on the image display panel, and the illumination region by each color light is formed on the image display panel. An optical unit that causes each of the color lights to enter the image display panel so as to move continuously; and an image display panel driving circuit that drives each pixel of the image display panel. A color image display device that performs color display by driving each of the pixels with a signal corresponding to the color of the color, so that a part of the adjacent illumination area on the image display panel overlap each other, Serial each color light is incident on the image display panel, the superimposed two colors color lights and drives a luminance signal component of the pixel to incident.

According to the first configuration, by overlapping a part of the adjacent two-color illumination areas on the image display panel, it is possible to increase the light condensing area as compared with a case where the illumination areas are not overlapped. To reduce the need for point light sources,
Since the condensing optical system can be downsized, downsizing of the entire apparatus can be achieved. Further, by using the light of the superimposed portion for displaying the luminance component, the light from the light source unit can be effectively used.

[0013] In the first configuration, the optical means includes first optical means to which each color light from the light source unit is incident, and a plurality of reflecting surfaces, and the optical means which emits the first optical means. A rotating polygon mirror that scans each color light when each color light is incident on and reflected by the reflection surface, and a second optical unit that guides each color light from the rotating polygon mirror to the image display panel, The principal rays of the respective color lights emitted from the first optical unit are incident on the reflection surface of the rotary polygon mirror at different positions in the rotation direction of the rotary polygon mirror at different incident angles, whereby the It is preferable that the principal rays of the respective color lights reflected by the reflection surface enter the second optical means at different angles, and then enter different positions on the image display panel. According to such a preferred configuration, the optical means is constituted by the rotating polygon mirror and the condensing optical system around the rotating polygon mirror, so that the size of the apparatus can be reduced.

[0014] In the above-mentioned first configuration, red,
An image in which green and blue color signals are input, a luminance signal component is detected from the color signals, and a signal obtained by subtracting the luminance signal component from the color signals and the luminance signal component are output to the image display panel driving circuit. It is preferable to further include a signal processing circuit. According to such a preferable configuration, it is possible to display a color image which is bright and excellent in color purity and luminance gradation.

Next, in the color image display device according to the second configuration of the present invention, a light source unit for emitting red, green, and blue color lights, respectively, and an incident light in accordance with at least red, green, and blue color signals. An image display panel composed of a number of pixels for modulating light, and each color light from the light source unit forms a strip-shaped illumination area at a different position on the image display panel, and the illumination area by each color light displays the image. Optical means for making each of the color lights incident on the image display panel so as to move continuously on the panel, and an image display panel drive circuit for driving each pixel of the image display panel. A color image display device that performs color display by driving each of the pixels with a signal corresponding to the color of the incident light, and further includes a color image display device that responds to a change in the color of the light incident on each of the pixels. Drive pixels Characterized in that it comprises a driving timing adjusting circuit for adjusting the timing of the signal.

According to the second configuration, by using the drive timing adjustment circuit to adjust the timing of the drive signal input to each pixel, the color switching timing of the light incident on each pixel and the pixel The timing of the input drive signal can be matched. As a result, it is possible to correct the relative displacement and the variation in the width in the moving direction of the illumination area of each color light due to the mechanical tolerance of the optical system, and it is possible to display a color image with a good white balance.

In the second configuration, the drive timing adjustment circuit includes a circuit for outputting a test pattern signal, and a switch circuit for selecting either the test pattern signal or an input video signal. It is preferable to have a control circuit and a delay control circuit for delaying an output signal of the test pattern switching control circuit for an arbitrary time. According to such a preferred configuration,
The white balance can be easily adjusted.

Next, in the color image display device according to the third configuration of the present invention, a light source unit that emits red, green, and blue color lights, respectively, and at least light incident in accordance with each of the red, green, and blue color signals. An image display panel composed of a number of pixels for modulating light, and each color light from the light source unit forms a strip-shaped illumination area at a different position on the image display panel, and the illumination area by each color light displays the image. Optical means for making each of the color lights incident on the image display panel so as to move continuously on the panel, and an image display panel drive circuit for driving each pixel of the image display panel. A color image display device that performs color display by driving each of the pixels with a signal corresponding to a color of incident light, wherein the optical unit is a first optical unit that receives each color light from the light source unit. And multiple A rotating polygonal mirror that scans each color light when the respective color lights emitted from the first optical unit are incident on and reflected from the reflecting surface, and the respective color lights from the rotating polygonal mirror are provided. Second optical means for guiding to the image display panel, and a principal ray of each color light emitted from the first optical means is provided on a reflecting surface of the rotating polygon mirror in a rotating direction of the rotating polygon mirror. By being incident on different positions at different incident angles, the principal rays of the respective color lights reflected by the reflection surface are incident on the second optical means at different angles, and then different positions on the image display panel. And the first optical unit is configured to set an angle at which a principal ray of each color light emitted from the first optical unit is incident on a reflection surface of the rotary polygon mirror, for each of the color lights. Equipped with an adjustment mechanism It is characterized in.

According to the third configuration, the relative position of the illumination area of each color light is adjusted using the adjustment mechanism, so that the timing of color switching of light incident on each pixel and the timing of input to the pixel are changed. The timing of the drive signal can be matched. As a result, it is possible to correct the relative positional shift of the illumination area of each color light due to the mechanical tolerance of the optical system, and it is possible to display a color image with a good white balance.

In the second and third configurations, the color lights are made incident on the image display panel so that a part of the adjacent illumination areas on the image display panel overlap each other, and It is preferable to drive a pixel on which the two color lights are incident with a luminance signal component. According to such a preferred configuration, by overlapping a part of the adjacent two-color illumination areas on the image display panel, it is possible to increase the light condensing area as compared with a case where no overlapping is performed,
Since the necessity of a point light source is reduced and the size of the condensing optical system can be reduced, the size of the entire apparatus can be reduced. Further, by using the light of the superimposed portion for displaying the luminance component, the light from the light source unit can be effectively used.

In the above preferred configuration, red, green, and blue color signals are input, a luminance signal component is detected from each of the color signals, and a signal obtained by subtracting the luminance signal component from each of the color signals and the luminance signal component. And a video signal processing circuit that outputs the video signal to the image display panel drive circuit. According to such a preferable configuration, it is possible to display a color image which is bright and excellent in color purity and luminance gradation.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a configuration diagram of a color image display apparatus according to Embodiment 1 of the present invention.

The color image display device according to the present embodiment includes an image display panel 204, a video signal processing circuit 301, an image display panel driving circuit 205, a light source unit 201, and a scanning optical system 203. The light source unit 201 is R (red), G
The light of each color (green) and B (blue) is emitted toward the scanning optical system 203. The scanning optical system 203 guides each of the incident color lights to the image display panel 204 and illuminates the same. On the image display panel 204, three substantially strip-shaped illumination regions of substantially the same size by red light, green light, and blue light are formed side by side in the scanning direction 219. The longitudinal direction of the substantially rectangular illumination area is a direction orthogonal to the scanning direction 219. The illumination area of each color light continuously moves in the scanning direction 219.

The illumination areas adjacent to each other in the scanning direction 219 overlap each other to form an overlapped portion 302. By illuminating the image display panel 204 such that a part of the adjacent different color light overlaps on the image display panel 204 in this manner, the condensing area of each color light on the image display panel 204 can be widened. Can be reduced, which leads to downsizing and also reduces the need for a point light source. Also, as described later, by using the superimposed portion 302 for image display, light can be effectively used.

Next, the operation of the circuit section will be described. The image display panel driving circuit 205 illuminates the image display panel 204 while scanning it, and outputs the R, G, and B signals from the scanning optical system 203.
Display panel 2 according to the output timing of each color light
04 is output. The video signal processing circuit 301 at the preceding stage of the image display panel drive circuit 205 calculates a luminance signal component W ′ from the input RGB signals and outputs the result. In the case where a luminance display period is provided in addition to each of the RGB display periods, it is necessary to reduce color purity and secure gradation when displaying a single color. FIG. 2 shows a circuit example of the video signal processing circuit 301 in consideration of solving these problems.

As shown in FIG. 2, the video signal processing circuit 30
Reference numeral 1 denotes a two-system comparison circuit 303 inserted into each of the RGB signal input stages, an arithmetic control circuit 304, a luminance signal output circuit 305, a subtraction circuit 306 and a switch circuit 307 provided in each of the RGB signal processing stages. Consists of The video signal processing circuit 301, based on the input RGB signals,
An R′G′B ′ signal and a luminance signal component W ′ obtained by the following calculation are output.

The arithmetic processing will be described with reference to FIG. The input RGB signals are compared with the signal amplitudes A and C in two systems of comparison circuits 303 (FIG. 3A), and the comparison result is sent to the arithmetic and control circuit 304. Arithmetic control circuit 3
04 performs the following adaptive processing.

That is, when the amplitudes of the input signals of the three colors RGB are larger than the amplitude A, the luminance signal output circuit 3
05 to output a luminance signal component W ′.
06, controlling the switch circuit 307 to output R ′, G ′, B ′ obtained by performing a process of subtracting the luminance signal component from each of the RGB input signals (FIG. 3B).

One of the RGB input signals (or 2 colors)
When the amplitude of the signal of (color) is larger than the amplitude A and smaller than the amplitude C, and the amplitude of the other two colors (or one color) is smaller than the amplitude A, the luminance signal component W ′ is not output. , And outputs the input RGB signal without any processing (through output). This prevents a decrease in color purity (FIG. 3C).

One color (or 2 colors) among the RGB input signals
If the amplitude of the signal of (color) is larger than the amplitude C and the amplitude of the signals of the other two colors (or one color) is smaller than the amplitude A, a luminance signal component W ′ is output. R ′, G ′, obtained by performing a process of subtracting a luminance component
B ′ is output. Thus, priority is given to display brightness and luminance gradation over color purity (FIG. 3D).

The R′G′B ′ signal output from the video signal processing circuit 301 and the luminance signal component W ′ obtained by calculation are input to the image display panel driving circuit 205.
The image display panel drive circuit 205 drives the image display panel 204 based on these input signals.

FIG. 4 shows an example of the configuration of the image display panel drive circuit 205. As shown in FIG. 4, the image display panel driving circuit 205 includes a buffer memory 330, a selector 33
2 and a timing control circuit 331.
The input R′G′B ′ signal and luminance signal component W ′ are
One or more frames are temporarily stored in the buffer memory 330. At the timing of the output signal from the timing control circuit 331, the selector 332 switches the color of the video signal data to be read corresponding to the color of the illumination light for each pixel, and reads the necessary video signal data from the buffer memory 330. Thus, each pixel of the image display panel 204 is driven by a signal that matches the timing of switching the illumination light.

FIG. 5 shows a relationship between light for illuminating an arbitrary pixel on the image display panel 204 and a drive signal input to the pixel. The horizontal direction in FIG. 5 indicates a time axis.

(A) shown in the upper part of FIG. 5 differs from the first embodiment in that the overlapping portion 302 of the adjacent illumination light (see FIG.
Reference) is not shown. In this case, the color light illuminating a certain pixel becomes B (blue) at timing 311 and G at timing 312 within the time corresponding to one frame.
(G), and sequentially to R (red) at timing 313 (A-1). Therefore, the signal for driving this pixel is
At timing 311, the B (blue) signal is changed to timing 312.
By switching to the G (green) signal at time 313 and the R (red) signal at timing 313, the driving according to the color of the illumination light can be performed (A-2).

(B) shown in the lower part of FIG. 5 shows the case of the first embodiment in which the overlapped portion 302 of the adjacent illumination light (see FIG. 1) is present. In this case, the color light that illuminates a certain pixel has a timing 3 within a time corresponding to one frame.
11 at B (blue) and at timing 314 Cy (cyan:
B (blue) and G (green) overlapped light) at timing 31
2 at G (green) and at timing 315 Ye (yellow:
G (green) and R (red) overlapped light)
3 at R (red), at timing 316 Mg (magenta:
(Red light of R (red) and B (blue)) (B-1). Therefore, a signal for driving this pixel is converted into a B ′ (blue) signal at timing 311, a W ′ signal (luminance signal) at timing 314, and a G ′ signal at timing 312.
A (green) signal, a W ′ signal (luminance signal) at timing 315, an R ′ (red) signal at timing 313, and a W ′ signal (luminance signal) at timing 316 (B-2). As described above, in the periods 324, 325, and 326 in which adjacent different color lights are superimposed and illuminated, driving is performed using the luminance signal component. By adding R and G, G and B, and B and R mixed color lights, white light is synthesized. By driving the present embodiment, it is possible to add a luminance component in addition to the RGB signal display. Becomes

The above-described drive timing processing shown in FIG. 5 is a case of analog driving used for a liquid crystal light valve or the like. However, when digital driving by PWM is performed, PWM driving is performed during the blue light illumination period. B 'at 321
Signal, the G ′ signal in the green light illumination period 322, the R ′ signal in the red light illumination period 323, and the superimposed light illumination periods 324, 32
5 and 326, respectively, are performed based on the luminance signal W ', so that an appropriate color display can be realized.

(Embodiment 2) FIG. 6 is a configuration diagram of a color image display apparatus according to Embodiment 2 of the present invention.

The color image display device according to the present embodiment includes a light source 201, a light condensing means (first optical means) 202,
Rotating polygon mirror 212, scanning optical system (second optical means) 2
03, an image display panel 204, and an image display panel drive circuit 205 (not shown).

The light source 201 has a light source 207 for red light, a light source 208 for blue light, and a light source 209 for green light that emit red, blue and green colors, each having a rectangular shape on the light emission side. Light emitting units 206R, 206B, and 206G are provided. The respective color lights emitted from the light emitting units 206R, 206G, 206B are incident on the first condensing lenses 210R, 210G, 210B of the condensing means 202 for each color light. After each color light exits the first condenser lens 210R, 210G, 210B,
Second condenser lens 211R, 211G, 211B for each color light
, And is reflected by a reflecting surface 213 formed on the outer peripheral surface of the rotary polygon mirror 212, passes through the scanning lens 214 of the scanning optical system 203, and reaches the image display panel 204.

FIG. 7 shows an example of the illumination state of the image display panel 204 at a certain moment. On the effective pixel area of the image display panel 204, light emitting units 206R, 206B, 2
Strip-shaped illumination regions of each color light corresponding to the 06G rectangular opening shape are arranged and formed in the scanning direction 219. In FIG. 7, R indicates a red light illumination area, G indicates a green light illumination area, and B indicates a blue light illumination area. Adjacent illumination areas overlap each other at the boundary and overlap with each other.
To form

Here, when a certain moment of the rotation of the rotary polygon mirror 212 is captured, as shown in FIG.
3. An aggregate of red, green, and blue light (condensing spot) 221 on 3
R, 221G, and 221B are formed substantially in a row in the rotation direction 212a so as not to overlap with each other.

The rotary polygon mirror 212 is rotated about a rotation shaft 215 by a motor (not shown) in the rotation direction 212a. The state of emitted light due to rotation will be described with reference to FIG.

FIGS. 9A to 9F show the rotating polygon mirror 21.
2 shows the rotation of No. 2 and the accompanying change in the lighting state of the image display panel 204 due to each color light at regular time intervals. In each case, in the illumination state of the image display panel 204 shown on the upper side, an illumination area by red light, an illumination area by green light, and an illumination area by blue light are indicated by R, G, and B, respectively, as in FIG. ing. In the figures showing the rotation of the lower rotating polygon mirror 212 and the reflection state of each color light, 218R, 218G and 218B denote a red light chief ray, a green light chief ray, and a blue light chief ray, respectively. Shows the direction of travel.

At time T = t1 (FIG. 9A),
The red, green, and blue color lights enter the common reflecting surface 213a of the rotating polygon mirror 212, and the blue light is rotated in the rotation direction 212a as shown in the figure.
, The green light reflects at a slightly smaller angle than the blue light, and the red light reflects at an even smaller angle than the green light. Therefore, each color light is scanned by the scanning optical system 203.
At different angles. Here, the scanning optical system 203 is an optical system in which the height of a light beam at an illumination position is determined by the angle of incident light. Therefore, each color light is transmitted to the image display panel 2.
04 at different positions on the light emitting portions 206R, 206G,
A 06B image is formed as shown. That is, on the image display panel 204, a blue light illumination area, a green light illumination area, and a red light illumination area are formed in this order from the top.

From time T = t1 to time T = t2 when the rotary polygon mirror 212 is rotated by a predetermined angle (FIG. 9)
(B)), the red light and the green light are incident on the common reflecting surface 213a of the rotating polygon mirror 212, while the blue light is incident on the new rotating reflecting surface 213b. At this time, in particular, the angle of incidence of the blue light on the reflection surface 213b is small, so that the reflection angle in the rotation direction 212a is the smallest. Therefore,
The green light is reflected at the largest angle in the rotation direction 212a,
Red light reflects at a slightly smaller angle than green light, and blue light reflects at an even smaller angle than red light. Therefore,
Each color light is incident on the scanning optical system 203 at a different angle, and each color light forms an image of the light emitting units 206R, 206G, and 206B at different positions on the image display panel 204 as illustrated. That is, a green light illumination area, a red light illumination area, and a blue light illumination area are formed on the image display panel 204 in this order from the top.

At time T = t3, at which the rotary polygon mirror 212 is further rotated by a predetermined angle from time T = t2 (FIG. 9)
(C), only the red light is incident on the reflecting surface 213a, and the green light and the blue light are incident on the common reflecting surface 213b. At this time, particularly, the angle of incidence of the green light on the reflection surface 213b is small, and hence the reflection angle in the rotation direction 212a is the smallest. Therefore, the red light is reflected at the largest angle in the rotation direction 212a, the blue light is reflected at a slightly smaller angle than the red light, and the green light is reflected at a smaller angle than the blue light. Accordingly, each color light is incident on the scanning optical system 203 at a different angle, and each color light forms an image of the light emitting portions 206R, 206G, 206B at different positions on the image display panel 204 as shown in the figure. That is, the image display panel 2
A red light illuminating area, a blue light illuminating area, and a green light illuminating area are sequentially formed on the pixel 04 from the top.

At time T = t4 when the rotary polygon mirror 212 is further rotated by a predetermined angle from time T = t3 (see FIG. 9).
(D), each color light of red, green and blue enters the common reflection surface 213b. This is the same positional relationship as the time T = t1 (FIG. 9A), and the illumination state of the image display panel 204 by each color light is also the same.

Further, at time T = t5 when the rotary polygon mirror 212 is rotated by a predetermined angle (FIG. 9E), the red light and the green light are incident on the common reflecting surface 213b, and the blue light is newly reflected. The light enters the surface 213c. This is the same positional relationship as the time T = t2 (FIG. 9B), and the illumination state of the image display panel 204 by each color light is also the same.

Further, at time T = t6 when the rotary polygon mirror 212 is rotated by a predetermined angle (FIG. 9F), red light is incident on the reflecting surface 213b, and green light and blue light are shared by the reflecting surface 213c. Incident on. This is the time T = t
3 (FIG. 9C), and the illumination state of the image display panel 204 by each color light is the same.

As described above, the strip-shaped illumination areas formed by the red, green, and blue color lights formed on the image display panel 204 are:
It moves sequentially in the scanning direction 219. Although only a specific period (time T = t1 to t6) is shown in FIG. 9, since the rotating polygon mirror 212 is continuously rotating, the illumination area of each color light scans on the image display panel 204 from bottom to top. Direction 21
The color light continuously moves (scans) in the direction of 9, and the illumination area of the color light that has reached the upper end returns to the lower end and moves from the bottom to the top again.

The scanning optical system 203 has the function of an Fθ lens (the function of forming an image at a position proportional to the angle of incidence of incident light) and the function of zooming to illuminate an appropriate area on the image display panel 204. It is composed of a system.

The image display panel 204 includes well-known means, for example, a transmission type liquid crystal display panel, an incident side polarizing plate which is a polarizer provided on the incident side, and an analyzer provided on the exit side. A transmission type liquid crystal light valve including an emission side polarizing plate can be used.

As described above, while moving the illumination area of each color light, each pixel on the image display panel 204 is converted into a video signal corresponding to the color light illuminating the pixel by using the image display panel drive circuit 205. Drive with By scanning each color light at high speed, an image for each color is synthesized on the retina of the observer and recognized as a color image.

As described above, the configuration in which each color light is incident on the rotary polygon mirror 212 at different positions at different angles of incidence makes it possible to use an image display panel having no color selection means such as a color filter. Color display becomes possible. In addition, at this time, the image display panel 204
Since each pixel of the above displays all colors of red, green and blue in one frame, the resolution does not decrease. Further, since the light from the light source is always effectively guided to the image display panel, a high light utilization rate can be realized.

Further, scanning is performed using a polygon mirror which is a rotating polygon mirror 212, and each color light is reflected on its reflection surface 213.
Since the light is condensed upward, the reflection surface 213 can be reduced. As a result, not only can the rotating polygon mirror 212 be made smaller, but also the motor that rotates it can be made smaller. Therefore, it is possible to reduce the size, weight, and cost of the entire apparatus.

Further, by providing a superimposed portion 302 adjacent to the scanning light of the three colors RGB, the image display panel 20 is provided.
It is possible to increase the condensing area of each color light on 4. As a result, similarly to the first embodiment, the F
By reducing the number, it is possible to reduce the size, and it also has the effect of reducing the need for a point light source.

The operation of the image display panel driving circuit 205 is the same as that of the first embodiment, and will not be described.
Is used for displaying the luminance component, so that the light use efficiency does not decrease. Further, as in the case of Embodiment 1, since the image display panel 204 can be applied to any display device that modulates incident light and performs display, any of a transmission-type or reflection-type light valve can be used. But can be used. The driving process can be performed by either analog driving or PWM digital driving. However, it goes without saying that a device that can respond at high speed is required.

(Embodiment 3) FIG. 10 is a configuration diagram of Embodiment 3 of the present invention. This embodiment is similar to the first embodiment.
1 (FIG. 1), a drive timing adjustment circuit 400 is provided between the video signal processing circuit 301 and the image display panel drive circuit 205. The drive timing adjustment circuit 400 includes a test pattern switching control circuit 401,
It comprises a buffer memory 407, a drive timing control circuit (delay control circuit) 408, and a ROM 409 for storing adjustment values.

The test pattern switching control circuit 401, as shown in FIG. 11, passes a video signal through a switch circuit 403 for switching between each video signal (R'G'B 'and luminance component W') and the test pattern signal. It is inserted on the main line. As the test pattern signal, a constant level signal output from the constant value output circuit 404 is sufficient, but it is necessary that arbitrary values can be set independently for each of the RGB signals and the luminance signal component W. Switch circuit 403
Is switched by the switch switching control circuit 405.

A buffer memory 407 is inserted after the test pattern switching control circuit 401. The RGB signals and the luminance signal component W are temporarily stored in the buffer memory 407. The drive timing control circuit 408 is a general memory controller that controls a memory write / read operation. The drive timing control circuit 408 includes:
An arbitrary delay time can be set for each of the RGB signals and the luminance signal component W, and each can be read from the buffer memory 407 after a predetermined delay time.
For the luminance signal component W, a buffer memory 40 for three surfaces
7, and the delay time is set separately for each of the luminance signal components (W1, W2, W3 in FIG. 11) that drive three different overlapping portions (Mg, Cy, Ye) between the RGB illumination areas. it can. Each delay time is recorded in the ROM 409. The output of the buffer memory 407 is input to the image display panel drive circuit 205, and the image display panel 204 is driven.

FIG. 12 is an explanatory diagram of the drive timing. Like FIG. 5, FIG.
4 shows a relationship between light for illuminating an arbitrary pixel and a drive signal input to the pixel. The horizontal direction in FIG. 12 indicates a time axis.

(A) shown in the upper part of FIG. 12 shows the drive timing of the first embodiment. That is, when focusing on a certain pixel, the illumination light incident on the pixel is B (blue) and Cy (cyan: B) within a time corresponding to one frame.
(Overlapping light of (blue) and G (green)), G (green), Ye (yellow: overlapping light of G (green) and R (red)), R
(Red), then Mg (magenta: overlapping light of R (red) and B (blue)) (A-1). Correspondingly,
The drive signal input to the pixel is a B ′ (blue) signal,
Switching is performed in the order of the W ′ signal (luminance signal), the G ′ (green) signal, the W ′ signal (luminance signal), the R ′ (red) signal, and the W ′ signal (luminance signal) (A-2). Here, the switching timing of the drive signal is fixed, and when the timing of the switching coincides with the timing of the color switching of the illumination light for illuminating the pixel, a good color image is obtained by such drive control. It is possible to get.

However, the illumination light for illuminating the pixels is shifted due to a shift in the scanning phase of each of the RGB illumination lights or a difference in the width of each illumination area in the scanning direction due to an error in the mechanism of the optical system. May change as shown in (B-1) of the lower part (B) of FIG. In such a case, when the pixel is driven at the drive signal switching timing shown in (A-2), a shift occurs between the illumination light color switching timing and the driving signal switching timing, and the white balance is lost. And good color images cannot be obtained.

According to the present embodiment, R, G, B, and luminance components (W1, W2, W3) are obtained by the following method.
Can be set independently of each other, and the above-mentioned timing mismatch can be eliminated.

(B) shown in the lower part of FIG. 12 shows the drive timing adjusted in timing according to the present embodiment. The timing adjustment according to the present embodiment will be described with reference to FIGS.

A pixel on the image display panel 204 corresponds to FIG.
(B-1), the switch circuit 403 in the test pattern switching control circuit 401 is switched to the test pattern output mode. Next, the level of the test pattern signal output from the constant value output circuit 404 is set to the maximum for the B signal, and the other G signal, R signal, and luminance signal are set to the non-display level. At this time, this pixel is in a period 419 in (B-2) of FIG.
Is driven, and blue should be displayed on the screen. However, the driving start timing 413 does not coincide with the timing of switching of the color of the illumination light, and the driving period 419 is of a mixed color portion (the Mg and Cy portions in FIG. 12B-1) with the illumination light of another color. In the case of extending over the lighting period, the color is not pure blue and a mixed color is displayed. In such a case, the adjuster adjusts the delay amount of the B signal in the buffer memory 407 so that the display on the screen becomes a pure blue color. The adjustment value is stored in the ROM 409. By performing the above operation, the drive start timing 413 of the B signal and the drive period 419 become as shown in FIG.
Is set to coincide with the blue light illumination period. The G signal and the R signal are adjusted in the same manner, and the adjustment values are stored in the ROM 409.

Next, an example of a method of adjusting the drive start timing of the luminance components W1, W2, W3 will be described. The test pattern signal level is such that the luminance signal is maximized, the R signal, the G signal
The signal and the B signal are set to the non-display level. Output signals W1, W2, and W3 of the buffer memory 407 are input to the image display panel drive circuit 205, and the panel 204 is driven. At this time, this pixel is driven only during periods 420, 422, and 424 in (B-2) of FIG. If the drive periods 420, 422, and 424 based on the luminance signal coincide with the illumination period of the mixed color portion, the screen display should be white due to the integration effect of human eyes. However, the drive start timings 414, 416, and 418 based on the luminance signals W1, W2, and W3 do not coincide with the switching timing of the mixed color portion of the illumination light, and the drive periods 420, 422, and
When 424 spans the illumination period of each of the R, G, and B color lights, some color is displayed. In such a case, the adjuster adjusts the white balance using the color difference meter.
Specifically, the luminance signals W1, W
2. Adjust the delay amount of W3. The adjustment value is stored in the ROM 409. By performing the above operation, the luminance signal W
1, W2, W3 drive start timings 414, 41
6, 418 and the drive periods 420, 422, 424 are shown in FIG.
It is set so as to coincide with the illumination period of the mixed color light (Mg, Cy, Ye) of (B-1).

With the above method, the timing shift between the illumination light for illuminating the pixel and the drive signal for driving the pixel is eliminated.

FIG. 12B-2 shows the drive timing when the pixels are driven in an analog manner. In the case of analog drive, drive start timings 413 to 418
(The position of the black circle “●” in FIG. 12 (B-2)) and the drive end timing (the position of the white circle “の” in FIG. 12 (B-2)) must be performed at the timing shown in the figure. It is assumed that the display device has a driving and high-speed response. On the other hand, in the case of the PWM drive, the drive start timing 4
13 to 418 (the position of the black circle “●” in FIG. 12 (B-2))
Is adjusted to adjust the driving period (4 in FIG. 12B-2).
19 to 424) are slid.

The driving timing adjustment technique described above is
The present invention is not limited to the configurations shown in FIGS. 10 to 12, and is effective in other configurations according to the gist of the present invention. For example, the present invention can be used for an image display device that does not drive a luminance component (that is, drives only RGB color signals as shown in FIG. 5A).

(Embodiment 4) FIG. 13 is a configuration diagram of a color image display apparatus according to Embodiment 4 of the present invention.

The color image display device according to the present embodiment has a light source section 201, a condensing section (first optical section) 202,
It comprises a scanning optical system (second optical means) 203, an image display panel 204, and an image display panel drive circuit 205.

The light source unit 201 has a red light source unit 207, a blue light source unit 208, and a green light source unit 209 that emit red, blue and green colors, each having a rectangular shape on the light emitting side. Light emitting units 206R, 206B, and 206G are provided. The respective color lights emitted from the light emitting units 206R, 206G, 206B are incident on the first condensing lenses 210R, 210G, 210B of the condensing means 202 for each color light. After each color light exits the first condenser lens 210R, 210G, 210B,
Second condenser lens 211R, 211G, 211B for each color light
, And is reflected by a reflecting surface 213 formed on the outer peripheral surface of the rotary polygon mirror 212, passes through the scanning lens 214 of the scanning optical system 203, and reaches the image display panel 204.

The second condenser lens 211 of the condenser 202
R, 211G, and 211B, as shown in FIG.
A lens position adjustment mechanism 427 that can move the condenser lenses 211R, 211G, and 211B in a direction perpendicular to the optical axis.
R, 427G, and 427B. Second
When the condenser lenses 211R, 211G, and 211B can move in a direction perpendicular to the optical axis, the reflecting surface 21 of the rotating polygon mirror 212 is moved.
The angle of incidence of light incident on 3 changes. That is, the light condensing means 202 has a light incident angle variable function. Taking the blue light emitted from the second condenser lens 211B as an example, the angle of incidence on the reflection surface 213 of the rotary polygon mirror 212 is adjusted by the adjusting mechanism 427.
When the value changes with B, the light height of the light beam incident on the scanning optical system 203 changes, so that the illumination range 428 of the blue light on the image display panel 204 changes to an arbitrary position within the variable range 429. Green and red light image display panel 204
Similarly, the upper illumination range is also adjusted by the adjusting mechanisms 427G and 4G.
27R can be changed in the vertical direction. As described above, in the color image display device of the present embodiment, the respective illumination ranges of the blue, green, and red light on the image display panel 204 can be independently adjusted in the scanning direction 219.

As described in the third embodiment, the timing between the timing of switching the color of the illuminating light for illuminating a pixel and the timing of switching the driving signal input to the pixel due to an error in the optical system or the like. In such a case, a white balance is lost and a good color image cannot be obtained. The color image display device of the present embodiment eliminates the difference between the timings of the two by using the adjustment mechanisms 427R, 427G, and 427B.

The adjustment method will be described with reference to FIG.
Like FIG. 5, FIG. 14 shows a relationship between light illuminating an arbitrary pixel on the image display panel 204 and a drive signal input to the pixel. The horizontal direction in FIG. 14 indicates a time axis.

FIG. 14C shows a drive signal input to an arbitrary pixel. The drive signal includes a B (blue) signal and a W signal.
One signal (luminance signal), G (green) signal, W2 signal (luminance signal), R (red) signal, and W3 signal (luminance signal) are switched in this order. Here, the switching timing of the drive signal is fixed.

FIG. 14A shows the switching timing of the light illuminating the pixel before adjustment. That is, the illumination light incident on this pixel is B (blue), Cy (cyan: overlapping light of B (blue) and G (green)), G (green),
Ye (yellow: overlapping light of G (green) and R (red)),
Switching is performed in the order of R (red) and Mg (magenta: overlapping light of R (red) and B (blue)). Here, the switching timing of the illumination light may be different from that in FIG.
As shown in (A), the timing is shifted from the original switching timing. That is, regarding the illumination area of each color light on the image display panel 204, the green (G) light and the red (R) light
Each illumination area of the light approaches the illumination area side of the blue (B) light, and as a result, cyan (Cy: overlapping light of B (blue) and G (green)) and magenta (Mg: R (red)) And B (blue)
Illuminating area width of the light (overlapping light with
The illumination area width of G (green) and R (red) is narrowed. As a result, the switching timing of the illumination light in FIG. 15A does not match the switching timing of the drive signal in FIG. 14C, and the white balance is lost.
A good color image cannot be obtained.

In this state, the white balance is adjusted as follows. First, the switch circuit 403 in the test pattern switching control circuit 401 shown in FIG. 11 is switched to the test pattern output mode. Next, as the test pattern signal level, the luminance signal is set to the maximum, and the R, G, and B signals are set to the non-display level. At this time, the image display panel 204 outputs the luminance signals W1, W2,
It is driven only by W3. In this state, the adjusting mechanism 427
By sequentially operating R, 427G, and 427B, the white balance is adjusted by the colorimeter. FIG. 14 (A)
In the example shown in FIG. 14, using the adjustment mechanisms 427G and 427R, the illumination area of the green (G) light and the illumination area of the red (R) light on the image display panel 204 are changed as shown by arrows 430 and 431 in FIG. It is relatively moved with respect to the illumination region of blue (B) light. FIG. 14B shows the timing of switching the light illuminating the pixel after the adjustment. FIG. 14 (B)
The switching timing of the illuminating light is the same as the switching timing of the drive signal in FIG. 14C, and a good color image is obtained.

As described above, all of the third and fourth embodiments are common in that the shift between the switching timing of the illumination light and the switching timing of the drive signal is adjusted. In the third embodiment, each of the RGB color signals is adjusted. In contrast, in the fourth embodiment, the start timing of driving the luminance signal component is adjusted by sliding in a circuit.
The difference is that the illumination areas on the image display panel 204 are shifted and adjusted by mechanically changing the positions of 11R, 211G, and 211B.

Although FIG. 14 shows an example of an image display device that drives each of the RGB color signals and luminance signal components, the adjusting mechanisms 427R and 427 of the fourth embodiment are described.
The adjustment method using G, 427B is not limited to this. For example, the driving of the luminance signal component is not performed (that is, FIG.
In an image display device driven by only RGB color signals (as shown in FIG. 1A), it can be used as an adjustment method for eliminating overlapping portions of illumination light of each color of RGB.

The display device (light valve) used in the above-described color image display device of the present invention may be either a transmission type or a reflection type, and the driving method is either analog driving or digital driving. It may be.

[0084]

As described above, according to the present invention, it is possible to reduce the size of the optical system of the image display panel and the entire apparatus. Further, it is not necessary to make the light source a point light source in order to reduce the size of the device.

Further, by overlapping a part of the adjacent illumination area and using the overlap part for displaying the luminance component,
The light from the light source can be used effectively.

Further, by using a circuit or mechanical adjustment means, it is possible to correct the relative positional shift of the illumination area of each color light and the variation in the width in the moving direction due to the mechanical tolerance of the optical system, and the white balance can be improved. A good color image can be displayed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a color image display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a video signal processing circuit used in the color image display device according to the first embodiment of the present invention;

FIG. 3 is an explanatory diagram illustrating signal processing performed by a video signal processing circuit used in the color image display device according to the first embodiment of the present invention;

FIG. 4 is a block diagram of an image display panel driving circuit used in the color image display device according to the first embodiment of the present invention;

FIG. 5 is a timing chart showing a relationship between illumination light and a drive signal in the color image display device according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram of a color image display device according to a second embodiment of the present invention.

FIG. 7 is a schematic front view showing an illumination area formed on an image table panel of the color image display device according to Embodiment 2 of the present invention.

FIG. 8 is a front view showing a condensed spot formed on a rotary polygon mirror of the color image display device according to the second embodiment of the present invention;

FIG. 9 is a view for explaining the scanning principle of each color light in the color image display device according to the second embodiment of the present invention.

FIG. 10 is a configuration diagram of a color image display device according to a third embodiment of the present invention.

FIG. 11 is a block diagram of a test pattern switching control circuit used in the color image display device according to the third embodiment of the present invention.

FIG. 12 is a timing chart showing a relationship between illumination light and a drive signal in the color image display device according to the third embodiment of the present invention.

FIG. 13 is a configuration diagram of a color image display device according to a fourth embodiment of the present invention.

FIG. 14 is a timing chart showing a relationship between illumination light and a drive signal in the color image display device according to the fourth embodiment of the present invention.

FIG. 15 is a configuration diagram of a single-panel projection type color image display device using a conventional scanning optical system.

16 is a configuration diagram of a color separation optical system of the single-panel projection type color image display device of FIG.

[Explanation of symbols]

Reference Signs List 201 Light source unit 202 Light condensing unit (first optical unit) 203 Scanning optical system (second optical unit) 204 Image display panel 205 Image display panel drive circuit 206R 206G 206B Light emitting unit 207 Red light source unit 208 Blue light Light source unit 209 for green light Light source unit for green light 210R 210G 210B First condenser lens 211R 211G 211B Second condenser lens 212 Rotating polygon mirror 213 Reflecting surface 214 Scanning lens 215 Rotation axis 218R Red light principal ray 218G Green light principal ray 218B Blue Light chief ray 219 Scanning direction 221R, 221G, 221B Focused spot 301 Video signal processing circuit 302 Superposed part 303 Comparison circuit 304 Operation control circuit 305 Luminance signal output circuit 306 Subtraction circuit 307 Switch circuit 311 B signal drive start timing 31 G signal drive start timing 313 R signal drive start timing 314, 315, 316 Luminance signal drive start timing 321 B light illumination period 322 G light illumination period 323 R light illumination period 324, 325, 326 Superimposed light illumination period 330 Buffer memory 331 Timing control circuit 332 Selector 400 Drive timing adjustment circuit 401 Test pattern switching control circuit 403 Switch circuit 404 Constant value output circuit 405 Switch switching control circuit 407 Buffer memory 408 Drive timing control circuit (delay control circuit) 409 ROM 413 B drive start timing 414 W1 drive start timing 415 G Drive start timing 416 W2 drive start timing 417 R drive start timing 418 W3 drive start Timing 419 B signal drive period 420 W1 signal drive period 421 G signal drive period 422 W2 signal drive period 423 R signal drive period 424 W3 signal drive period 427R, 427G, 427B Lens position adjustment mechanism 428 Illumination range 429 Variable range 430 G illumination Position adjustment direction 431 R Illumination position adjustment direction 920 Light source section 921 Color separation optical system 921a, 921b Dichroic mirror 921c, 921d Reflection mirror 922 Illumination section 922r, 922g, 922b Opening 923 Light valve 924 Scanning optical system 924a Rotating prism 925 lens

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Narita Yamagishi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 2H045 AA01 BA24 BA33 DA04 5C006 AA22 AF46 AF52 BB11 BB28 EA01 EC11 FA16 FA20 FA22 FA41 5C080 AA09 AA10 BB05 CC03 DD01 DD22 DD26 EE29 EE30 FF14 JJ01 JJ02 JJ04 JJ05 JJ06

Claims (8)

[Claims] A light source unit that emits red, green, and blue color lights, an image display panel including a plurality of pixels that modulates incident light according to at least red, green, and blue color signals; Each color light from the unit forms a strip-shaped illumination area at different positions on the image display panel, and the color light is applied so that the illumination area by each color light continuously moves on the image display panel. An optical unit for inputting light to the image display panel; and an image display panel driving circuit for driving each pixel of the image display panel, wherein each pixel is driven by a signal corresponding to a color of light incident on each pixel. A color image display device that performs color display by doing, so that each of the color lights is incident on the image display panel so that a part of the illumination regions adjacent to each other on the image display panel overlap each other, A color image display device comprising: driving a pixel on which the superimposed two-color light is incident with a luminance signal component. 2. The optical means includes: first optical means on which each color light from the light source unit is incident; and a plurality of reflecting surfaces.
A rotating polygon mirror that scans the respective color lights when the respective color lights emitted from the first optical unit enter the reflection surface and are reflected; and guide the respective color lights from the rotating polygon mirror to the image display panel. And a second optical unit, wherein a principal ray of each color light emitted from the first optical unit is:
By being incident on the reflecting surface of the rotating polygon mirror at different angles of incidence at different positions in the rotation direction of the rotating polygon mirror, the principal rays of the respective color lights reflected by the reflecting surface are reflected by the second optical element. 2. The color image display device according to claim 1, wherein the light is incident on the means at different angles from each other, and then is incident on different positions on the image display panel. 3. A red, green, and blue color signal is input, a luminance signal component is detected from each of the color signals, and a signal obtained by subtracting the luminance signal component from each of the color signals and the luminance signal component are displayed on the image. 3. The color image display device according to claim 1, further comprising a video signal processing circuit for outputting to the panel drive circuit. 4. A light source unit for emitting red, green, and blue color lights, an image display panel including a plurality of pixels for modulating incident light in accordance with at least red, green, and blue color signals, and the light source Each color light from the unit forms a strip-shaped illumination area at different positions on the image display panel, and the color light is applied so that the illumination area by each color light continuously moves on the image display panel. An optical unit for inputting light to the image display panel; and an image display panel driving circuit for driving each pixel of the image display panel, wherein each pixel is driven by a signal corresponding to a color of light incident on each pixel. A color image display device that performs color display by means of a drive timing adjustment circuit that adjusts the timing of a signal for driving each pixel so as to correspond to a change in the color of light incident on each pixel. Color image display apparatus comprising: a. 5. A test pattern switching control circuit comprising: a circuit for outputting a test pattern signal; a switch circuit for selecting either the test pattern signal or an input video signal; 5. The color image display device according to claim 4, further comprising a delay control circuit for delaying an output signal of the pattern switching control circuit by an arbitrary time. 6. A light source unit for emitting red, green, and blue light, respectively, an image display panel including a plurality of pixels for modulating incident light in accordance with at least red, green, and blue color signals; Each color light from the unit forms a strip-shaped illumination area at different positions on the image display panel, and the color light is applied so that the illumination area by each color light continuously moves on the image display panel. An optical unit for inputting light to the image display panel; and an image display panel driving circuit for driving each pixel of the image display panel, wherein each pixel is driven by a signal corresponding to a color of light incident on each pixel. A color image display device that performs color display by means of the optical device, wherein the optical unit includes a first optical unit on which each color light from the light source unit is incident, and a plurality of reflection surfaces, and the first optical unit includes Each of the above emitted A rotating polygon mirror that scans each color light when light is incident on and reflected by the reflection surface, and a second optical unit that guides each color light from the rotating polygon mirror to the image display panel, The principal ray of each color light emitted from the first optical means is:
By being incident on the reflecting surface of the rotating polygon mirror at different angles of incidence at different positions in the rotation direction of the rotating polygon mirror, the principal rays of the respective color lights reflected by the reflecting surface are reflected by the second optical element. The first optical unit is configured to be incident on the unit at different angles from each other, and then incident on different positions on the image display panel. A color image display device, comprising: an adjusting mechanism for adjusting an angle of incidence on the reflecting surface of the rotary polygon mirror for each of the color lights. 7. A pixel on which the two color lights are made incident on the image display panel so that a part of the illumination areas adjacent to each other on the image display panel overlap each other, and The color image display device according to claim 4, wherein the color image display device is driven by a luminance signal component. 8. A red, green, and blue color signal is input, a luminance signal component is detected from each of the color signals, and a signal obtained by subtracting the luminance signal component from each of the color signals and the luminance signal component are displayed on the image. 8. The color image display device according to claim 7, further comprising a video signal processing circuit for outputting to a panel drive circuit.