JP2003172900A - Device, system, and method for image projection display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a data projector device more small-sized, lightweight, and low-cost by greatly simplifying basic constitution and to reduce the influence of a light source on visual sensation. <P>SOLUTION: An image projection display device which modulates illumination light emitted by a light source part to project video data is characterized by that the light source part (block image light emission unit 104) comprises an image block light source (high-luminance light emitting diode 109) constituted by arranging a plurality of light source parts in two dimensions to enable modulated light emission corresponding to the pixel array and gradations of an arbitrary local image of a projection image and is equipped with a two-dimensional scanning part (horizontal scanning mirror 106 and vertical scanning mirror 107) which can make a scan so that an image block light emission image moves on a projection surface in two dimensions within a specified range at a specified scanning frequency to draw the whole projection image. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image projection display device,
Regarding an image projection display system and an image projection display method,
In particular, the present invention relates to an image projection display device, an image projection display system, and an image projection display method for converting image data output from an information device or the like into visual image information and projecting and displaying the image information on a projection surface.

[0002]

2. Description of the Related Art Conventionally, in the case of giving a presentation, an explanation, etc. to a plurality of people, various means have been provided for enlarging an image and projecting it on a predetermined projection surface. With the recent development and popularization of personal computers and presentation creation software, an environment has been set up in which images can be converted into data and easily handled. Therefore, unlike the old slide films and OHP, personal computers can be used without much effort. 2. Description of the Related Art Image projection display devices (hereinafter referred to as data projectors), which can directly convert created image data as projection images and project the images and which can easily interface with digital information devices, have been widely used.

A projection method using a data projector such as a digital cinema has been attempted even in movie screening.
Further, at home, it is expected to use a data projector that can easily realize a powerful image on a large screen at low cost. Therefore, in addition to the demand for image quality, the market demand for miniaturization and cost reduction is rapidly increasing.

The data projector is largely of the liquid crystal type and the D type.
The LP system is becoming the mainstream. Particularly regarding miniaturization, the DLP method developed by Texas Instruments is attracting attention. This is a completely new reflection projection image forming method by an optical processing technology using an optical modulation element called DMD (Digital Micromirror Device). Using a device in which hundreds of thousands of 16 μm square micro mirrors are spread, each mirror is ± 10
An image is created by switching to the angle of degrees, and gradation can be expressed by adjusting the reflection time and the switching duty of the mirror. The advantage is that the response speed is fast, the reflection type reduces loss of light quantity, high brightness is obtained, and the image can be formed by complete digital control.
Since the response speed is fast, the light from the light source can be reflected on this device by the three primary color plane sequential illumination method by rotating the color filter to form a projected image, so that it is smaller and lighter than other conventional methods. Make it possible.

In addition, a laser display, which is a conventional laser display, has been applied as a data projector. An image is formed by independently modulating the output of the laser beams of the three primary colors to express gradation and scanning the projection surface of the projection screen two-dimensionally at high speed. According to this method, it is not necessary to separately configure the light source unit and the light modulation unit, and the laser light that is the light source may be directly modulated. Therefore, there is a possibility of simplifying the structure and downsizing. Furthermore, it is possible to make the entire screen in focus even on a three-dimensional projection surface by taking advantage of the characteristics of laser light, and because each primary color has a single wavelength. In addition, it is possible to express a wide range of color tones, and it is possible to obtain high image quality with excellent color reproducibility that is not possible with conventional image display devices.

However, a large-sized device is being put into practical use for the reason that a high-power laser is required in order to obtain a sufficient brightness of a display image, and the problem of downsizing and scanning in general use There is still a problem called the influence on the vision when the laser is directly viewed.

[0007]

In view of the recent development of an electronic communication environment, a display method using a data projector, which has a high affinity with various information equipments, is one of the means for a large-scale display device. Since it is possible to easily use a large screen without the need to install it, it is expected to be used more and more widely in the future. In order to promote its utilization, the emergence of a data projector that is easy to use, small and lightweight, and low in cost is an important factor.

However, although efforts have been made to reduce the size and weight of existing data projectors, the basic structure of the data projector is as follows: a high-brightness white light source requiring a heat radiating means, three primary color separation means for the light source, and a reflection type ( A drastic improvement of the basic structure that complicates a light modulating device for forming an expensive image by a DMD, a reflective liquid crystal) or a transmissive liquid crystal (transmissive liquid crystal), a means for synthesizing color images of three primary colors, a projection optical system However, there is a limit in promoting further miniaturization and low cost. Therefore, it has not been sufficiently achieved to realize an ultra-miniaturized projector which is excellent in portability, can be carried around comfortably, and can be easily installed without worrying about space.

The present invention has been made in view of such a problem, and its object is to integrate the functions of the three primary color light sources and the light modulation device by using a projection principle different from the conventional apparatus. By providing a method of forming a projected image by unique two-dimensional scanning of partial images, the basic configuration is greatly simplified, the size and weight of the data projector device are further reduced, and the cost is further promoted. An object of the present invention is to provide an image projection display device and an image projection display method that can mitigate the effects of the above.

Another object of the present invention is to provide an image projection display device, an image projection display system, and an image projection display method that are more excellent in color reproducibility by forming a primary color light source having a wavelength close to a single wavelength.

[0011]

In order to achieve the above object, a first invention is an image projection display device for modulating and projecting illumination light emitted from a light source unit in image data, in the light source unit. Is composed of an image block light source in which a plurality of light source members are arranged two-dimensionally and is capable of performing modulated light emission corresponding to the pixel arrangement and gradation of an arbitrary local image of a projected image. The image block luminescent image is provided with a two-dimensional scanning unit that can scan the projection surface in a two-dimensional manner by a predetermined scanning range and a predetermined scanning frequency so as to draw the entire projection image.

A second aspect of the present invention is the image projection display apparatus according to the first aspect, wherein the image block light source has an independent structure and modulates and emits an image block emission image of three primary colors of red, green and blue. To do.

According to a third aspect of the present invention, in the image projection display apparatus according to the first aspect, the image block light source has a configuration in which three primary colors of red, green and blue are mixed and arranged in a predetermined arrangement. The emitted image is modulated and emitted.

Further, a fourth invention is the image projection display device according to the first invention, wherein the light source section is configured in a plurality so as to correspond to a plurality of arbitrary local images of the projected image. Consists of.

A fifth invention is the image projection display apparatus according to the fourth invention, wherein the image block light source shares the two-dimensional scanning unit and corresponds to a plurality of arbitrary local images of the projected image. , A plurality of regions are configured to simultaneously draw different regions of the entire projected image.

A sixth aspect of the invention is the image projection display apparatus according to the first aspect, wherein the light source member of the image block light source is a high brightness LED.

Further, a seventh invention is the image projection display apparatus according to the first invention, wherein the light source member of the image block light source is a semiconductor laser light emitting device.

An eighth aspect of the invention is the image projection display apparatus according to the first aspect, wherein the image block light source and the two-dimensional scanning unit move the local image two-dimensionally to draw the entire projected image. The amount of movement of the projected local image corresponding to the image block emission image is equal to or less than the number of horizontal and vertical pixels forming the image block emission image by the image block light source, and the number of pixels or a multiple of the number of pixels. Controlled.

A ninth aspect of the present invention is the image projection display apparatus according to the first aspect, wherein the image block light source moves the local image in two dimensions and draws the entire projected image. The amount of light emitted from the light source member of the corresponding image block light source is modulated and controlled based on the pixel gradation data of the image corresponding to.

The tenth invention is the image projection display apparatus according to the first invention, wherein the two-dimensional scanning unit is projected when the local image is two-dimensionally moved to draw the entire projected image. The moving state of the light emission image of the image block is scan-controlled at a speed that cannot be visually detected.

An eleventh aspect of the invention is the image projection display apparatus according to the first aspect, wherein the two-dimensional scanning section is composed of a micromachine mirror.

A twelfth invention is the image projection display apparatus according to the first invention, wherein the two-dimensional scanning section is composed of a bimorph which forms a reflecting surface.

A thirteenth aspect of the invention is an image projection display system including an image projection display device that modulates and projects image data by illuminating light emitted from the light source part, wherein the light source part comprises a plurality of light source members. Is arranged two-dimensionally, and is composed of an image block light source configured to be capable of modulated light emission corresponding to the pixel array and gradation of an arbitrary local image of the projected image,
The image block light emitting image from the image block light source is provided with a two-dimensional scanning unit that can scan the projection surface in a two-dimensional manner with a predetermined scanning range and a predetermined scanning frequency to draw the entire projection image.

A fourteenth aspect of the present invention is the image projection display system according to the thirteenth aspect, wherein the image projection display device associates a plurality of arbitrary local images of the projection image with each other, and the entire projection image is different. A plurality of regions are simultaneously drawn.

The fifteenth aspect of the present invention is an image projection display method for modulating and projecting illumination light emitted from a light source unit to project image data, wherein the light source unit has a plurality of light source members arranged two-dimensionally. The image block light source is composed of an image block light source configured to emit light in a modulated manner corresponding to a pixel array and gradation of an arbitrary local image of a projected image, and an image block light emission image from the image block light source is generated by using a two-dimensional scanning unit. The projection plane is moved two-dimensionally in a predetermined scanning range and a predetermined scanning frequency to draw the entire projected image.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an image projection display device according to the present invention will be described below.

(First Embodiment) FIG. 1 is a view showing the basic arrangement of an image projection display apparatus according to the first embodiment of the present invention. The present image projection display device includes a projection module 101.
And a projection screen 102. The block projection image 103 is projected from the projection module 101 to the projection screen 1
An image is formed on the surface of No. 02, and is projected so as to be scanned at high speed in a two-dimensional direction as indicated by an arrow in the figure.

Although FIG. 1 shows an example of forming a red image among the three primary color images forming a color image, naturally, the same applies to the case of forming the remaining green image and blue image of the three primary colors. A projected image can be formed with such a configuration.

The projection module 101 comprises a block image light emitting unit 104 as a light source unit, a condensing optical system 105, a horizontal scanning mirror 106, a vertical scanning mirror 107, and a projection optical system 108. Horizontal scanning mirror 106,
The vertical scanning mirror 107 constitutes a two-dimensional scanning unit.

The block image light-emitting unit 104 is, for example, a high-luminance light-emitting diode set 109 having the same single wavelength and uniform light-emitting characteristics in a 3 × 3 matrix array with the same light-emitting direction (image). Block light source). The high-brightness light-emitting diode is used because heat radiation is small and photoelectric conversion efficiency is good, so that a heat radiation means that hinders miniaturization can be omitted.

The light source light emitted from the high-intensity light emitting diode set 109 is incident on and transmitted to the optical fiber 110, and is composed of light emitting cells which are bundled at their tips and are closely aligned, and a block light emission image 111 having a reduced light emitting area is displayed. Form. The block emission image 111 is formed as a block projection image 103 on the projection screen 102 via the projection optical system 108 by utilizing the reflection of the horizontal scanning mirror 106 and the vertical scanning mirror 107 via the condensing optical system 105.

Horizontal scanning mirror 106, vertical scanning mirror 1
Reference numeral 07 is means for two-dimensionally scanning the formed block emission image 111 in the horizontal and vertical directions on the projection surface of the projection screen 102 in a predetermined projection area and at a predetermined speed. Therefore, it is not limited to this, as long as the above-mentioned object can be realized by changing the arrangement order of the respective mirrors or using other scanning means.

For example, since a scanning device having two axes, which can scan horizontally and vertically with the mirror surface as one surface, has been developed, use of this can be an effective means. Further, although the block image light emitting unit 104 is configured to form the block light emitting image 111 by the optical fiber 110 in the present embodiment, as shown in FIG. 2, high brightness light emitting diodes are arranged accurately and densely to form a desired block. The block image light emitting unit 104 may be configured so that the light emitting image 111 can be formed, and the same state may be realized by directly and efficiently using the condensing optical system 105. Although not shown, the high-intensity light-emitting diodes are not limited to be densely arranged, and even if they are arranged at multiples of the pitch, the same effect as that of the present embodiment can be obtained, so that it is appropriately designed. It may be selected depending on the conditions.

FIG. 3 is a functional block diagram of the projection module 101. The functional configuration of the projection module 101 will be described below using this functional block diagram. When the image frame switching signal is input, the projection pixel data reading unit 121 sequentially reads the pixel data of the corresponding projection image in a predetermined order. Of the gradation data Y (i, j) of the read pixel data, the horizontal pixel position i, and the vertical pixel position j, the gradation data Y (i, j) is input to the light emission output modulator 122, and A corresponding high-intensity light-emitting diode of the high-intensity light-emitting diode set 109 that constitutes the block image light-emitting unit 104 is selected, and its light emission output is modulated.

Here, i and j indicate the coordinates of the pixel data to be read on the image frame. The modulated value is input to the block image light emitting unit drive controller 123,
The corresponding high brightness light emitting diode of the block image light emitting unit 104 is caused to emit light to control the light amount. These series of operations are collectively executed in units of the quantity of the high-intensity light emitting diodes that form the high-intensity light emitting diode set 109. That is, according to the present embodiment, {Y (m, n) | m = i,
The gradation data is a set of pixel data of i + 1, i + 2, n = j, j + 1, j + 2}.

On the other hand, the horizontal pixel position i and the vertical pixel position j output from the projection pixel data reading unit 121 are input to the horizontal scanning mirror drive control unit 124 and the vertical scanning mirror drive control unit 125, respectively, and the horizontal scanning mirror device is output. 1
06, the control amount to the vertical mirror device 107 is output. According to the output control amount, the horizontal scanning mirror device 106 and the vertical mirror device 107 are driven and controlled so that the light emission cells of the corresponding block light emission image 111 are imaged at the corresponding positions on the projection screen surface.

The control operation as described above is repeated for the image frame to be projected, and the block projection image 103 is moved on the projection screen surface in pixel units at a speed that cannot be perceived due to the visual afterimage phenomenon of a human, thereby forming an image frame. A projected image of the corresponding image data is formed on the projection screen. In this embodiment, the horizontal scanning mirror device 106 and the vertical mirror device 107 are controlled by the position data of the projection image data, but they are made to perform a predetermined operation, and the horizontal scanning mirror device 10 is operated.
6. A control method in which the position of the block projection image 103 on the projection screen is detected from the control amount of the vertical mirror device 107 and the pixel data of the data frame R described later corresponding to the detected value is read is also applicable.

FIG. 4 is a diagram for explaining the principle of superposition scanning using the visual afterimage phenomenon in which the block projection image 103 is intentionally moved in pixel units as described above. The color image data to be projected is composed of three primary color image data, and forms a red image data frame R, a green image data frame G, and a blue image data frame B.
For ease of explanation, the case of the data frame R of a red image will be described as an example. As shown in the figure, the data frame R is composed of a two-dimensional pixel array, and each pixel represents each gradation value.

With the upper left corner of the data frame R as the origin, the pixel coordinate in the horizontal direction is i and the pixel coordinate in the vertical direction is j.
Let Pij denote an arbitrary pixel. The projection pixel data reading unit 121 described with reference to FIG.
When 11 is composed of a 3 × 3 pixel block, 3 × 3 is obtained by shifting one pixel horizontally or vertically as shown in the figure.
The brightness value for the pixel is read.

The lower part of FIG. 4 shows a block projection image 103 obtained by projecting on a projection screen 102 a block emission image 111 generated by causing the 3 × 3 pixel blocks read from the data frame R to emit light as described above. It shows the relative relationship with. Letting the upper left corner of the projection area be the origin, the pixel coordinate in the horizontal direction is i, the pixel coordinate in the vertical direction is j, and any projection spot is Sij.
ij is associated one to one.

In the block projection image 103, the gradation value of the pixel read from the data frame R is reflected in the light quantity of the corresponding projection spot, and the projection area is moved one projection spot in the horizontal or vertical direction at time Δt. , The entire projection area is drawn as a result so as to be convolved with the block projection image 103. The time Δt needs to be such a short time that the moving state of the block projection image 103 cannot be perceived by human vision and one drawn projection image can be perceived stationary. Same pixel Pij of data frame R
When the 3 × 3 pixel block is moved, the projection spot Sij corresponding to is to be successively emitted and projected 9 times by different high-intensity light emitting diodes in this case.

For example, focusing on the projection spot S3,2 in the figure, the gradation value of the corresponding pixel P3,2 of the data frame R is one of the nine high-luminance light emitting diode sets 109 for generating the block light emission image 111. The six high-intensity light emitting diodes are selected in a time-division manner, the light amount is controlled, and light is emitted. That is, the block projection image 1
In accordance with the movement of 03, the block projection image 10 while the projection spot S3,2 reflecting the same pixel P3,2
The light spot responsible for drawing 3 is different from time to time.

The block projection image 1 as described above will be described below.
A method of generating the entire projected image by convolving with 03 will be described. Ideally, the high-intensity light-emitting diodes of the high-intensity light-emitting diode set 109 that generate the block emission image 111 have uniform emission characteristics (light quantity, light distribution characteristics, etc.). However, in general, variations in characteristics exist with a certain width, and it is extremely difficult to strictly manage them, and if strictly managed, the cost will increase.

FIG. 5 is a block projection image 10 of this embodiment.
3 schematically shows the movement of the light spot position and the change of the reflected light amount with respect to the projection screen of FIG. When three adjacent light spots indicated by solid lines move in the horizontal direction, the respective projection spots S are generated by different high-intensity light emitting diodes, so that originally the same gradation must be expressed, but the amount of reflected light increases. Some variation will occur. For example, focusing on the projection spot Si, j, when the block projection image 103 is moved so as to be convoluted, the reflected light amount having variations as shown in the lower right of FIG. .

This means that one arbitrary projection spot S
Even if i and j are projected and superposed by a high-intensity light emitting diode having a plurality of variations, they are visually smoothed,
It is possible to make the light amounts of the projection spots uniform for the same gradation. As a result, it is possible to reduce the feeling of gradation unevenness in the projected image itself with respect to the data frame R, and it is possible to perform faithful image expression. Further, although the whole image is generated by the local block projection image 103, since the method is a convolutional drawing method by moving for each pixel, for example, the block projection image 103 is tiled like a joint. Is not perceived, and a very natural whole image can be obtained.

FIG. 6 is a functional block diagram of an image projection display device using the projection module 101. The image data input unit 141 inputs and processes output image data from an information device having a function of outputting various image data by a matched interface. The image data input unit 141 also outputs a switching signal for each image frame of the input image data, and the image frame switching control unit 1
Enter in 42. The image data output from the image data input unit 141 is once input to the resolution conversion unit 143, and the projection module 101 performs conversion processing to a resolution that allows projection display.

This conversion process is started by the frame switching signal output from the image frame switching control unit 142 and is completed until the next frame switching signal is input. The output from the resolution conversion unit 143 is input to the image processing unit 144, and various image processing such as γ correction, distortion correction processing, and color tone optimization processing is performed. Also in this image processing, the processing is started by the frame switching signal output from the image frame switching control unit 142 and is completed until the next frame switching signal is input. The image data subjected to the image processing is separated into red image data, green image data and blue image data, and the temporary storage means 1 respectively.
45 frame buffers R, G, and B are temporarily stored. The temporary storage is held until the next frame switching signal is input from the frame switching signal output from the image frame switching control unit 142.

Image data output from the frame buffer R, frame buffer G, and frame buffer B of the temporary storage means 145, that is, image data corresponding to the data frame R, data frame G, and data frame B described with reference to FIG. It is input to the projection module R (101), the projection module G (101), and the projection module B (101) that form the image projection unit 146, and a projection image is formed on the projection screen 102 by the method described above. The image projection unit 146 is also the image frame switching control unit 1.
A series of image projection operations is started by the frame switching signal output from 42, and the image projection operation is repeated until the next frame switching signal is input.

FIGS. 7 and 8 show a plurality of the above-mentioned projection modules capable of projecting a red image, a green image and a blue image.
The example of the method of drawing on a projection screen is shown. Figure 7
Is a projection module 1 for red, green and blue images
Each of 09-1, 109-2, and 109-3 is used as one set, and the block projection images corresponding to the block projection image 103 are independently scanned on the projection screen 102. In FIG. 8, a red image, a green image,
Using two sets of projection modules for blue images (first set: 109-1, 109-2, 109-3, second set: 109-4, 109-5, 109-6), each set The method of drawing each of the divided areas of the projection screen surface is shown. However, in this case, the seams of the separated areas are processed by the image processing unit 144 shown in FIG. 6 in terms of position and color tone so that there is no visual discomfort, and a natural entire image is obtained.

FIG. 9 is a diagram showing another configuration example of the block image light emitting unit. The block image light emitting unit 158 here has the laser diodes 154 arranged in a matrix. With the correction optical system 155,
The light distribution of each laser diode 154 is corrected to form a circular spot.

Horizontal scanning mirror 156, vertical scanning mirror 1
Although 57 is necessary, the projection optical system 108 in FIG. 1 can be omitted because it is a laser, and the structure can be further simplified.

Other projection principles are the same as in FIG. 1
52 is a projection screen, and 153 is a block projection image.

FIG. 10 is a diagram showing still another configuration example of the block image light emitting unit. Here, the block image light emitting unit by the laser array described in FIG.
Each of the primary colors RGB is used. The light source of the projection module 160 is the R block image light emitting unit 16
1 and G block image light emitting units 162 and B block image light emitting units 163. Each of them is arranged as shown in the figure and projected onto the horizontal scanning mirror 156 by an optical path combining unit 164 such as a cross prism. The block emission image is scanned by the vertical scanning mirror 157 and then projected onto the projection surface of the projection screen 152.

Here, in FIG. 10, the RGB block projection images 165 are drawn with a shift, but they actually match. The RGB block projection images may be simultaneously projected in synchronization, or may be sequentially switched in time division and projected. In this case, it is possible to instantaneously reduce the light intensity of the block projection image and prevent the inconvenience caused when the user directly looks at the image.

FIG. 11 is a diagram showing still another configuration example of the block image light emitting unit. Here, a plurality of block image light emitting units by the laser array described in FIG. 9 are configured (171 and 172 in FIG. 11), and multi-scan is realized in the same manner as the principle described in FIG. In FIG. 11, 170 is a projection module, and 17
Reference numerals 3 and 174 are block projection images.

(Second Embodiment) A second embodiment of the present invention will be described below. Here, the description of the same parts as those in the first embodiment will be omitted.

FIG. 12 shows the basic configuration of the second embodiment. Similar to the one shown in FIG. 1, it comprises a projection module 201 and a projection screen 202. The block projection image 203 is imaged on the surface of the projection screen 202 from the projection module 201 and is projected so as to be scanned at high speed in a two-dimensional direction as indicated by an arrow in the figure. The projection module 201 includes a block image light emitting unit 204, a condensing optical system 105, a horizontal scanning mirror 106, a vertical scanning mirror 107, and a projection optical system 108.

The method of constructing the block image light emitting unit 204 is greatly different from that of the first embodiment. In the second embodiment, the high brightness light emitting diode set 205 is
High-luminance light emitting diodes of the three primary colors RGB are mixed, and the light emitting directions are the same, so that a 3 × 3 matrix arrangement is formed. The three primary colors are shown differently according to the type of hatching.

This matrix arrangement is arranged in a predetermined RGB arrangement in the horizontal and vertical directions as shown in the figure, but it is better if the same color is not arranged continuously in the horizontal or vertical direction.
Desirable for achieving two-dimensional color uniformity. The light source light emitted from the high-intensity light emitting diode set 205 is incident on and transmitted to the optical fiber 206, and is composed of light emitting cells which are bundled at their tips and are densely aligned to form a block light emitting image 207 having a reduced light emitting area. Block emission image 20
Reference numeral 7 denotes a horizontal scanning mirror 10 via a condensing optical system 105.
6. Using the reflection of the vertical scanning mirror 107, a block projection image 203 is formed on the projection screen 202 via the projection optical system 108. The block projection image 203 is also projected in an RGB array that reflects the block emission image 207 as shown in the figure.

Horizontal scanning mirror 106, vertical scanning mirror 1
Reference numeral 07 is a unit for moving the projected block light emission image 207 two-dimensionally by moving the projection surface of the projection screen 202 in a horizontal direction and a vertical direction at a predetermined projection area and at a predetermined speed. As in the case of the first embodiment, the arrangement order of the respective mirrors or the use of other scanning means is not limited to this as long as the above object can be realized. Further, the block image emission unit 204 is also connected to the block image emission unit 2 by the optical fiber 206 in this embodiment.
In the same manner as in FIG. 2, the high-luminance light-emitting diodes are arranged accurately and densely, and the block image light-emitting unit 204 is configured so that a desired block light-emitting image 207 can be formed. A similar state may be realized by directly using the condensing optical system 105.

Further, by providing the horizontal scanning mirror 106 and the vertical scanning mirror 107 with a combined lens effect by using concave mirrors instead of plane mirrors, the projection optical system 108 can be omitted and the structure can be further simplified. It is possible.

FIG. 13 is a functional block diagram of an image projection display device using the projection module 201. Image data input unit 221, resolution conversion unit 223, image processing unit 22
4. The functions of the temporary storage unit 225, the projection module 201, and the image frame switching control unit 222 have the same functions as the corresponding portions in the functional block diagram of FIG. In order to more accurately represent the read pixel of the image data corresponding to each of the diode sets, the corresponding pixel data read unit 226
Is added as a configuration.

In the above structure, the data frame R, the data frame G, and the data frame B illustrated in FIG.
From the three data frames of the block emission image 207
The pixel data of the projection image corresponding to the RGB array of is sequentially read in a predetermined order. The series of operations for modulating the read gradation data of the RGB pixel data, causing the corresponding high-intensity light-emitting diodes of the block image light-emitting unit 204 to emit light, and controlling the light amount are in accordance with the first embodiment. By the method.

In the second embodiment, the block projection image 203 composed of the three primary colors RGB can be moved and scanned on the projection screen surface and drawn, so that the color shift can be reduced and the high brightness of each of the three primary colors RGB can be achieved. Since the light emitting diode set 109 or the block image light emitting unit 104 is not configured, the projection image display device itself can be made compact.

FIG. 14 is a diagram showing an example of a method of drawing on a projection screen by using a plurality of projection modules of this embodiment (color image drawing example by independent scanning). Here, two projection modules 201 and 201 'are used as one set. The convolutional block projection image 20
According to the third drawing projection method, the projection module 201 draws the upper half projection area 210 of the projection screen 202, and the projection module 201 ′ draws the lower half projection area 210 ′ of the projection screen 202. However, even in this case, the joints of the separated regions are processed so that there is no visual discomfort.

FIG. 15 is a diagram showing a projection module and a color image drawing example by the synchronous multi-scan.

Here, the projection module 220 uses two block image emission units 204 and 204 '(further, condensing optical systems 105 and 105'), but the horizontal scanning mirror 106 and the vertical scanning mirror 107 are made common. With such a configuration, it is possible to form two block projection images 203 and 203 ′ on the projection surface of the projection screen 202 and move and draw them at the same time.
The drawing method on the projection screen 202 is the same as the example described in FIG. 14, but only one projection module 220 is required.

Block image emitting units 204, 20
Adjusting the installation angle of 4 ', the condenser lens 10
The above effect is realized by making the light incident on the horizontal scanning mirror 106 via 5, 105 ′. According to this method, the individual block image light emitting units 204, 204 '
Since the drawing area that is taken up by is reduced, it is possible to secure the brightness of the projected image and simultaneously reduce the scanning frequency of the horizontal scanning mirror 106 and the vertical scanning mirror 107.

FIG. 16 is a modification of the configuration shown in FIG. In this configuration, the projection module 230 uses two block image emitting units 234 and 234 '(further, condensing optical systems 235 and 235'). In this modified example, the horizontal scanning mirror 236 is commonly used, but the vertical scanning mirror is used for each block image light emitting unit 23.
A pair of vertical scanning mirrors 237 corresponding to 4, 234 '.
237 'is arranged. With such a configuration, it is possible to form two block projection images 233 and 233 'on the projection surface of the projection screen 232 and move and draw them at the same time.

(Third Embodiment) The third embodiment of the present invention will be described below.
An embodiment will be described. The third embodiment relates to multi-directional scanning of laser projection, and FIGS. 17 and 18 show examples of a method of drawing on a projection screen by using a plurality of the projection modules 301 capable of projecting a red image, a green image and a blue image. Is shown.

FIG. 17 shows the projection modules 301-1, 301-2, 301- for red, green and blue images.
3 is used as one set, and each set is a set of projection spot images 3 corresponding to the above projection spot images.
03 is scanned on the projection screen 302.

In FIG. 18, projection modules 301-1 for the red image, the green image, and the blue image are provided.
3 is used one by one, and it is used as one set, but a method of projecting the projection spot image 303 on the projection screen 302 by intentionally providing the installation intervals of the respective projection modules is shown.

According to this method, the projection screen 302
Since the direction of the laser light incident on the laser can be randomized, for example, even when a person puts the projection module in the field of view from the projection screen 302 side, the probability of directly looking at all the laser light at one time can be reduced. If the output of each projection module is set so that it is not harmful even if it is directly viewed, it is an effective method as a safety measure while avoiding the risk of directly viewing the laser light.

As described above, in the present invention, various known techniques other than those described above can be applied as the mechanism for generating individual light sources, the mechanism for scanning the light sources, and the imaging optical system. Is natural.

According to the above-described embodiment, the functions of the small-sized, high-luminance, three-primary-color light source that does not require heat dissipation and the function of the light modulation device for image formation are integrated, and the flicker is generated by the original two-dimensional scanning of the formed partial image. Can be suppressed, and the basic configuration can be greatly simplified. Therefore, it is possible to provide an image projection display device that is compact, lightweight, quiet, consumes less power, and has excellent compatibility with digital information devices, and has the opportunity to give a presentation on a large screen with excellent portability. Can be created.

Further, by constructing a primary color light source having a wavelength close to a single wavelength, it is possible to provide a high quality projected image with further excellent color reproducibility. Furthermore, the projected light is dispersed and projected to project the projected image. By devising to generate the whole, it is possible to reduce the direct projection light, and it is possible to mitigate the visual impact.

The above-mentioned respective modes can be combined in various ways as much as possible.

[0078]

According to the first aspect of the invention, in the image projection display device, the light source section has a plurality of light source members arranged in a two-dimensional manner, and the pixel array and gradation of an arbitrary local image of the projected image. Corresponding to the image block light source configured to be capable of modulated light emission, and the image block light emission image emitted from the image block light source unit within a predetermined scanning range,
Two-dimensional scanning is performed at a predetermined scanning frequency, and the image block light emitting image can two-dimensionally move on the projection surface to draw the entire projection image.

That is, since the light source section and the light modulation section for forming an image by modulating the illumination light from the light source according to the gradation data of the projected image can be integrated, the illumination light from the light source can be extremely efficiently used. It can be used, and the size can be effectively reduced due to the simplification of the configuration.

According to the second aspect of the present invention, the image block light source has a red color by an independent structure,
Because the image block emission images of the three primary colors of green and blue are modulated and emitted, the image block emission image of the three primary colors for forming the projection color image is simply controlled in correspondence with the three primary color frames of the color image data. it can.

That is, the modulation control system circuit of the image block emission image of the three primary colors can be simplified, and the three primary color images are directly generated as the light source. Therefore, the structure for separating the white light source by the color plane sequential filter is not required, and the light source is used. The loss can be reduced and the space can be reduced.

According to a third aspect of the present invention, the image block light source is configured such that the three primary colors of red, green and blue are mixed and arranged in a predetermined arrangement to modulate and emit the image block light emission image. Therefore, the image block emission images of the three primary colors for forming the projection color image can be integrated into one on the light source side.

That is, there is no need to integrate the optical paths of the image block emission images generated separately for the three primary colors by the optical system, and the structure is simplified and the structure is effective for downsizing.

According to the invention described in claim 4, the light source section comprises a plurality of the image block light sources configured to correspond to a plurality of arbitrary local images of the projected image, and a plurality of image blocks. It is possible to divide the drawing area of the projection image and draw by using the light sources at the same time.

That is, it is possible to reduce the load of the light amount that each image block light source has, reduce the scanning frequency of the scanning mirror for drawing, and reduce the driving load.
Therefore, it is possible to effectively reduce the cost and enhance the durability performance.

According to a fifth aspect of the present invention, the image block light source corresponds to a plurality of arbitrary local images of the projected image by sharing the two-dimensional scanning unit, and different regions of the entire projected image. Since it is configured to draw a plurality of images simultaneously, it is possible to draw a plurality of local images on the projection surface simultaneously with a single set of scanning mirrors.

That is, since a plurality of local images drawn at the same time are projected at the same projection irradiation angle, it is possible to combine the red, green, and blue images of the local images on the projection surface depending on the projection position due to the inclination of the projection surface or the like. It is possible to avoid problems such as occurrence of color misregistration and the inability to synchronize the amount of movement of the projection image of the image block light source on the projection surface in synchronization.

According to the sixth aspect of the present invention, since the light source member of the image block light source is a high-intensity LED, it has a very high conversion efficiency, constitutes a compact light source, and has a heat dissipation mechanism. An unnecessary light source unit can be configured.

That is, it is possible to realize an image projection display device which is compact and lightweight and has high energy consumption efficiency.
In addition, since the three primary color light sources having a narrow wavelength range are used, it is possible to generate a high-quality projected image with excellent color reproducibility.

According to the invention described in claim 7, since the light source member of the image block light source is a semiconductor laser light emitting device, the characteristics of the laser are utilized,
It is possible to configure a light source that is compact and does not require a heat dissipation mechanism.

That is, it is possible to realize a compact and lightweight structure and to obtain a focused projected image on a projection surface of any shape, which enables screen-free and wide-ranging applications. Moreover, since the three primary color light sources of a single wavelength are used, it is possible to generate a high-quality projected image with excellent color reproducibility.

Further, according to the invention described in claim 8, the image block light source and the two-dimensional scanning unit use the image block light source when the local image is two-dimensionally moved and the entire projected image is drawn. It is possible to control the amount of movement of the projected local image corresponding to the image block emission image by the number of horizontal pixels or vertical pixels constituting the image block emission image and by the number of pixels or a multiple of the number of pixels. .

That is, the image block light emission image is displayed by all the light source members constituting the image block light source, and since it can be perceived as being integrated by the afterimage effect of the visual sense, the variation in the light amount characteristics of the light source member is caused. It is possible to form the absorbed projection image. Further, even if the projection image is drawn by dividing the image block light emission image, a projection image in which the divided area cannot be perceived can be obtained, and a high-quality projection image can be realized.

According to the ninth aspect of the invention, when the image block light source moves the local image two-dimensionally and draws the entire projection image, the pixel level of the image corresponding to the predetermined local image. The amount of light emitted from the corresponding light source member of the image block light source can be modulated and controlled based on the adjustment data.

That is, since the light quantity of the light source member of the image block light source can be directly electrically modulated, it is not necessary to form a modulation element separately from the conventional frame sequential color filter mechanism or light source, and the size and weight can be reduced. It can be realized.

According to the invention described in claim 10,
The two-dimensional scanning unit may control scanning at a speed at which the moving state of the projected image block luminescent image is visually undetectable when the local image is two-dimensionally moved to draw the entire projected image. it can.

That is, even if an image block image is drawn in a time-division manner, it is possible to create a state that is the same as visually detecting one projection image. It is possible to obtain a projected image.

According to the invention described in claim 11,
Since the two-dimensional scanning unit is composed of a micromachine mirror, it is possible to realize a high scanning speed of an image block light emission image and to reduce the size and weight.

According to the invention described in claim 12,
Since the two-dimensional scanning unit is composed of a bimorph that forms a reflecting surface, it is possible to realize an inexpensive and high-speed scanning speed of the image block emission image, and to reduce the size and weight.

According to the invention described in claim 13,
In the image projection display device, the light source unit is an image block light source configured such that a plurality of light source members are two-dimensionally arranged and modulated light emission is possible according to a pixel arrangement and gradation of an arbitrary local image of a projected image. And two-dimensionally scanning the image block light emission image emitted from the image block light source unit with a predetermined scanning range and a predetermined scanning frequency,
It is possible to construct a system in which the image block luminescent image can two-dimensionally move on the projection surface and draw the entire projection image.

That is, since the light source section and the light modulation section for forming an image by modulating the illumination light from the light source according to the gradation data of the projected image can be integrated, the illumination light from the light source can be extremely efficiently used. The system can be used, and it is possible to construct a system that effectively achieves downsizing due to the simplification of the configuration.

According to the invention described in claim 14,
It is possible to construct an image projection system in which a plurality of image projection display devices are configured so as to correspond to a plurality of arbitrary local images of a projected image and simultaneously draw different regions of the entire projected image.

That is, the installation position of each image projection display device can be flexibly selected, and the projection angle of the image block light emission image from the image projection display device to the projection surface can be randomized. This makes it possible to suppress the amount of light of the image block light-emission images from the individual image projection display devices without reducing the brightness of the entire projected image, thus reducing the probability of simultaneously visually detecting a plurality of image block light-emission images, It is possible to reduce the influence of a high light amount on the vision.

Further, according to the invention of claim 15,
In the image projection display device, the light source unit is an image block light source configured such that a plurality of light source members are two-dimensionally arranged and modulated light emission is possible according to a pixel arrangement and gradation of an arbitrary local image of a projected image. And two-dimensionally scanning the image block light emission image emitted from the image block light source unit with a predetermined scanning range and a predetermined scanning frequency,
The image block emission image can be moved two-dimensionally on the projection surface to draw the entire projection image.

That is, since the light source section and the light modulating section for forming an image by modulating the illumination light from the light source according to the gradation data of the projected image can be integrated, the illumination light from the light source can be extremely efficiently used. A method that can be used and that is effectively downsized due to the simplification of the configuration is provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a first embodiment of an image projection display device according to the present invention.

FIG. 2 is a diagram illustrating another configuration example of a block image light emitting unit 104.

FIG. 3 is a functional block diagram of a projection module 101.

FIG. 4 is a diagram for explaining the principle of superposed scanning using a visual afterimage phenomenon in which the block projection image 103 is intentionally moved in pixel units.

FIG. 5 is a diagram schematically showing the movement of the light spot position and the transition of the amount of reflected light with respect to the projection screen of the block projection image 103 of the present embodiment.

6 is a functional block diagram of an image projection display device using a projection module 101. FIG.

FIG. 7 is a diagram showing an example (No. 1) of a method of drawing on a projection screen by using a plurality of the projection modules capable of projecting a red image, a green image, and a blue image.

FIG. 8 is a diagram showing an example (No. 2) of a method of drawing on a projection screen by using a plurality of the projection modules capable of projecting a red image, a green image, and a blue image.

FIG. 9 is a diagram showing another configuration example of a block image light emitting unit.

FIG. 10 is a diagram showing still another configuration example of the block image light emitting unit.

FIG. 11 is a diagram showing still another configuration example of the block image light emitting unit.

FIG. 12 is a diagram showing a basic configuration of a second embodiment of an image projection apparatus according to the present invention.

FIG. 13 is a functional block diagram of an image projection display device using the projection module 101.

FIG. 14 is a diagram showing an example of color image drawing by independent scanning.

FIG. 15 is a diagram showing a projection module and a color image drawing example by a synchronous multi-scan.

16 is a diagram showing a modification of the configuration of FIG.

FIG. 17 is a diagram for explaining a multidirectional scanning method (first) of laser projection in the third embodiment of the invention.

FIG. 18 is a diagram for explaining a method (1) of multidirectional scanning of laser projection in the third embodiment of the invention.

[Explanation of symbols]

101 Projection module 102 projection screen 103 Block projection image 104 Block image emitting unit 105 Condensing optical system 106 horizontal scanning mirror 107 vertical scanning mirror 108 Projection optical system 109 high brightness light emitting diode set 110 optical fiber 111 block emission image

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/74 H04N 5/74 H // H04N 3/08 3/08

Claims (15)

[Claims] 1. An image projection display device for projecting image data by modulating illumination light emitted from a light source unit, wherein the light source unit has a plurality of light source members arranged in a two-dimensional manner and an arbitrary local portion of a projected image. The image block light source is configured to emit light in a modulated manner in accordance with the pixel arrangement and gradation of the image, and the image block light emission image from the image block light source has two projection planes with a predetermined scanning range and a predetermined scanning frequency. An image projection display device comprising a two-dimensional scanning unit that can scan in such a manner that it moves in a dimensional manner and draws the entire projected image. 2. The image block light source, which has an independent structure, modulates and emits an image block light emission image of three primary colors of red, green and blue.
The image projection display device according to. 3. The image according to claim 1, wherein the image block light source has a configuration in which three primary colors of red, green and blue are mixed and arranged in a predetermined arrangement to modulate and emit the image block light emission image. Projection display device. 4. The image projection display apparatus according to claim 1, wherein the light source unit includes a plurality of the image block light sources configured to correspond to a plurality of arbitrary local images of the projected image. 5. The plurality of image block light sources are configured to share the two-dimensional scanning unit and to correspond to a plurality of arbitrary local images of a projected image, and to draw different regions of the entire projected image at the same time. The image projection display device according to claim 4. 6. The image projection display apparatus according to claim 1, wherein the light source member of the image block light source is a high-intensity LED. 7. The image projection display apparatus according to claim 1, wherein the light source member of the image block light source is a semiconductor laser light emitting device. 8. The image block light source and the two-dimensional scanning unit horizontally and vertically configure the image block light emission image by the image block light source when a local image is two-dimensionally moved to draw the entire projection image. 2. The image projection display device according to claim 1, wherein the amount of movement of the projected local image corresponding to the image block emission image is controlled by the number of pixels or less and by the unit of the number of pixels or the unit of multiples of the number of pixels. . 9. The image block light source, which corresponds to a predetermined local image on the basis of pixel gradation data when a local image is two-dimensionally moved to draw the entire projected image. 2. The light emission amount of the light source member according to claim 1 is controlled to be modulated.
The image projection display device according to. 10. The two-dimensional scanning unit scans a moving state of the projected image block luminescent image at a speed that cannot be visually detected when the local image is two-dimensionally moved to draw the entire projected image. The image projection display apparatus according to claim 1, wherein the image projection display apparatus is controlled. 11. The image projection display apparatus according to claim 1, wherein the two-dimensional scanning unit includes a micromachine mirror. 12. The image projection display apparatus according to claim 1, wherein the two-dimensional scanning unit is configured by a bimorph that forms a reflecting surface. 13. An image projection display system including an image projection display device that modulates and projects image data by illuminating light emitted from a light source unit, wherein the light source unit has a plurality of light source members arranged two-dimensionally. And an image block light source configured to emit light in a modulated manner corresponding to a pixel array and gradation of an arbitrary local image of the projected image, and the image block light emission image from the image block light source has a predetermined scanning range and a predetermined range. An image projection display system comprising a two-dimensional scanning unit capable of scanning so that a projection plane is two-dimensionally moved by a scanning frequency to draw the entire projection image. 14. The plurality of image projection display devices are configured to simultaneously draw different regions of the entire projected image by associating a plurality of arbitrary local images of the projected image with each other. 13. The image projection display system according to 13. 15. An image projection display method for projecting image data by modulating illumination light emitted from a light source unit, wherein the light source unit has a plurality of light source members arranged in a two-dimensional manner and an arbitrary local portion of a projected image. The image block light source is configured to emit light in a modulated manner in accordance with the pixel arrangement and gradation of the image, and a two-dimensional scanning unit is used to scan the image block light emission image from the image block light source in a predetermined scanning range and a predetermined An image projection display method characterized in that the entire projection image is drawn by moving the projection surface two-dimensionally with the scanning frequency of.