KR102271555B1 - Apparatus for obtaining color image - Google Patents

Abstract

The present invention is an image input unit for receiving an external image; an image amplifier for receiving and amplifying an image from an image input unit; and an image display unit that receives the amplified image from the image amplifier and displays it on the screen; but, the image input unit includes three transparent bodies each having R (Red), G (Green), and B (Blue) colors, Provided is a color image acquisition device in which a shutter unit is positioned between an image input unit and an image amplifier tube so that an image having one of R, G, and B colors is divided according to time through a transparent body.

Description

Color image acquisition device {Apparatus for obtaining color image}

The present invention relates to a color image acquisition apparatus, and more particularly, to a color image acquisition apparatus capable of acquiring an image in a time-division method (Field Sequential Color Mode).

Night photographing devices mainly use infrared light emitting diodes (LEDs), which are mainly applied to surveillance cameras, and observe infrared rays reflected through infrared scanning with an image pickup device for low light.

Since the conventional low-illuminance night photographing apparatus uses an infrared LED, the observation distance is short, and the observation performance in low-illuminance is poor, so it is difficult to identify a distant object, so there is a limitation in use.

In particular, when a night gliding device is used for national defense purposes, for example, when it is used as a military surveillance device that prevents enemy access for the protection and security of major facilities such as military bases, clearer observational images are obtained for rapid detection of the enemy. I need this more.

In order to obtain a clearer image, an image intensifier tube that amplifies fine light tens of thousands of times can be used to monitor objects at night when observation is difficult.

Conventionally, a color filter is installed in the image amplifier to obtain a color image through the image amplifier.

However, the method using a color filter has problems in that it is difficult to realize a high resolution and a driving circuit is complicated because a large amount of light loss is caused by the color filter and one image element is composed of three pixels of RGB.

Korean Patent No. 0165592

The present invention has been devised to solve the above problems, and in particular, it is an object of the present invention to provide a color image acquisition apparatus capable of acquiring an image in a time-division method (Field Sequential Color Mode).

According to an embodiment of the present invention devised to achieve the above object, there is provided a color image acquisition apparatus, comprising: an image input unit for receiving an external image; an image amplifier for receiving and amplifying an image from an image input unit; and an image display unit that receives the amplified image from the image amplifier and displays it on the screen; but, the image input unit includes three transparent bodies each having R (Red), G (Green), and B (Blue) colors, A shutter unit is positioned between the image input unit and the image amplifier tube so that the image having one of R, G, and B colors is divided according to time through the transparent body.

In an embodiment of the present invention, the shutter unit may include a pair of glass plates each including a transparent electrode plate formed of an indium tin oxide (ITO) electrode, and liquid crystal between the glass plates.

Here, the shutter unit may divide the image input to the image input unit by color for a predetermined unit time.

In an embodiment of the present invention, the transparent body may be disposed so that the image input side is in contact with each other.

Here, the image amplifier tube includes a photocathode that receives an image and emits electrons, a micro channel plate that amplifies and emits electrons emitted from the photocathode tube, and light emission by the emitted amplified electrons. It may include a fluorescent screen (Phosphor Screen).

In addition, according to an embodiment of the present invention, each of the R, G, and B images passing through the R, G, and B transparent bodies including the optical body formed integrally with the transparent body or separately is located at the same position on the photocathode plate of the image amplifier tube. And it may be configured to form an image in size.

In an embodiment of the present invention, the image display unit includes a charge-coupled device that receives image contrast information from a fluorescent screen of an image amplifier tube, and an LCD panel that receives image contrast information from the charge-coupled device; , R, G, and B may include a backlight for emitting light to the rear side of the LCD panel by time division, respectively.

Here, the LCD panel may be a monochromatic transmissive type without a color filter.

In an embodiment of the present invention, the backlight may emit light of corresponding R, G, and B based on driving information of R, G, and B of the shutter unit.

Here, the backlight may be an edge-lit type.

According to the present invention, there is an effect that a color image can be obtained with an image amplifier by having a transparent body having R, G, and B colors, respectively, and a shutter unit that can divide each color image passing through each transparent body according to time. .

In addition, according to the present invention, each color image passing through the color transparent body and time-divided by the shutter unit is imaged at the same position and size on the photocathode plate of the image amplifier tube by the optical body so that it is recognized as one color image. It works.

1 shows the configuration of an apparatus for obtaining a color image according to an embodiment of the present invention;
2 shows the configuration of an image input unit, a shutter unit and an image amplifier tube provided in the color image acquisition device according to an embodiment of the present invention;
3 is a front view of the image input unit shown in FIG. 2,
4 shows the configuration of a shutter unit provided in the color image acquisition device according to an embodiment of the present invention;
5 is a diagram illustrating the configuration of an image display unit provided in a color image acquisition apparatus according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes “unit” and “group”, “module” and “unit”, “unit” and “unit”, “device” and “system” for components used in the following description are considered only for ease of writing the specification. It is assigned or used interchangeably, and does not have a distinct meaning or role by itself.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

1 shows the configuration of a color image acquisition apparatus according to an embodiment of the present invention, and FIG. 2 is an image input unit, a shutter unit and an image amplifier tube provided in the color image acquisition apparatus according to an embodiment of the present invention. The configuration is shown, and FIG. 3 is a front view of the image input unit shown in FIG. 2 .

Referring to FIG. 1 , an apparatus 100 for obtaining a color image according to an embodiment of the present invention includes an image input unit 110 receiving an external image, and an image amplifier tube receiving an image from the image input unit 110 and amplifying it. 150 and an image display unit 170 that receives the amplified image from the image amplifier tube 150 and displays it on the screen.

The image input unit 110 provided in the image acquisition device 100 of the present invention, as shown in FIGS. 2 and 3 , an external image input to the image input unit 110 is R (Red), G (Green) , may include three transparent bodies 111 , 112 , and 113 each having R, G, and B colors so as to be converted into a color image having one color of , B (Blue).

Here, the color transparent bodies 111, 112, and 113 may be installed close to each other. As an example, as shown in FIG. 3, the three transparent bodies 111, 112, 113 form an approximately triangle when viewed from the front and are arranged as closely as possible to receive an image. The surfaces may be configured to be in contact with each other.

By closely disposing the transparent bodies 111, 112, and 113 in this way, the color image passing through the transparent bodies 111, 112, and 113 can be projected as one image on the photocathode plate 151 of the image amplifier tube 150.

As described above, even when the transparent objects 111, 112, and 113 are closely arranged, the positions of the transparent objects 111, 112, and 113 are slightly different. Therefore, the image output from the image input unit 110 and passing through the shutter unit 130 is the same position of the photocathode plate 151. It may further include a correction means for making the incident. As an embodiment, the transparent bodies 111, 112, 113 so that each R, G, and B image passing through the R, G, and B transparent bodies 111, 112, and 113 is imaged at the same position and size on the photocathode plate 151 of the image amplifier tube 150. It may further include an optical body (not shown) formed integrally with or separately from. Accordingly, as shown in FIG. 2 , a plurality of color images a and b having different colors are projected onto the photocathode plate 151 of the image amplifier tube 150 at the same position and size, so that the color image is not distorted. It can be recognized as one input image.

Meanwhile, as another embodiment of the present invention, one chromic glass or a chromic film may be used to replace the three transparent bodies 111 , 112 , and 113 each having R, G, and B colors.

Here, the color-changing glass or the color-changing film is configured to pass only light of a desired color by controlling the transmittance of light, and there are largely active types and passive types. The active type is a device that artificially adjusts the transmittance by applying electricity through methods such as electrochromic, SPD (Suspended Particle Device), or liquid crystal. However, it is a device whose transmittance changes in response to temperature change. In the present invention, the system may be configured more simply by configuring the image input unit 110 with such a color-changing glass or a color-changing film and time-dividing the input light for each color.

In the embodiment of the present invention, between the image input unit 110 and the image amplifier tube 150 in order to input the color images formed through the transparent bodies 111, 112, and 113 to each color according to time and input to the image amplifier tube 150. The shutter unit 130 is located in the, the shutter unit 130 is provided with a plurality of each color corresponding to each transparent body (111, 112, 113) (in the side view of Figure 2, R shutter unit 131 corresponding to the R transparent body 111) And, only the B shutter unit 133 corresponding to the B transparent body 113 is shown). A detailed configuration of the shutter unit 110 will be described later.

The image amplifier tube 150 includes a photocathode 151 that converts an input image into initial electrons 10, and a micro channel plate that amplifies the initial electrons 10 and emits amplified electrons 20. , 153) and a fluorescent screen 155 emitted by the emitted amplified electrons 20.

The image amplifier tube 150 configured as described above converts the color image (photons) incident from the above-described image input unit 110 from the photocathode plate 151 to the electrons 10, and is made of optical fiber to form microchannels in a matrix form. A plurality of arranged microchannel plates 153 amplify the converted electrons 10 , and the amplified electrons 20 are incident on the fluorescent screen 155 , and the fluorescent screen 155 emits a color image (photons) again. This will amplify the color image.

That is, when photons of light constituting a color image are incident on the surface of the photocathode plate 151 , electrons 10 are emitted from the inside of the photocathode plate 151 and the electrons 10 pass through the microchannel plate 153 by a high voltage. It is amplified while generating thousands to tens of thousands of emission electrons 20 . Then, the generated emission electrons 20 reach the fluorescent screen 155 and emit light in the form of photons so that humans can see them.

The color image (eg, a night image) optically amplified in the same manner as described above is then transferred to the image display unit 170 as shown in FIG. 1 , and the detailed configuration of the image display unit 170 will be described later.

4 is a diagram illustrating a configuration of a shutter unit provided in an apparatus for obtaining a color image according to an embodiment of the present invention.

Referring to FIG. 4 , the shutter unit 130 according to an embodiment of the present invention includes a pair of glass plates 131 and 132 , a liquid crystal 135 between the glass plates 131 and 132 , and electrodes formed on the glass plates 131 and 132 , respectively. Plates 137 and 138 may be included.

Here, it is preferable that the electrode plates 137 and 138 use indium tin oxide (ITO), which is a transparent electrode, so that the input image can pass through the shutter unit 130 .

The shutter unit 130 is configured such that a voltage is applied to or not applied to the liquid crystal 135 by the switch 139 connected to the electrode plates 137 and 138 , and blocks or passes the image input to the shutter unit 130, respectively, thereby RGB. It is possible to divide an input color image having a color according to each color according to time.

That is, when no voltage is applied to the liquid crystal 135 , the liquid crystal 135 is arranged in a twisted shape so that the direction of the image input through the front glass plate 131 is changed by 90 degrees to pass through the rear glass plate 132 . be able to On the other hand, when a voltage is applied to the liquid crystal 135, the liquid crystal 135 is arranged in an even state and does not pass through the rear glass plate 132 while maintaining the direction of the image input through the front glass plate 131 as it is. can't

The shutter unit 130 according to an embodiment of the present invention configured as described above may divide the image input to the image input unit 110 by color for a predetermined unit time. For example, considering that the reaction speed of the liquid crystal 135 is approximately 1/1000 second, and a moving image is smoothly reproduced when the input image is 60 frames per second, the unit time may be 1/60 second. When a color image is input for each RGB color, the shutter unit 130 is configured to correspond to the position of each color image (a, b) passing through the image input unit 110 in one of the regions allocated for each color (ie, R , G, and B shutter parts) for 1/60 sec. and the area assigned to the other two colors is closed.

For example, as shown in Table 1 below, the shutter unit 130 may be driven for each color using 1/60 second as a unit time.

0 to 1/60 of a second 1/60 to 2/60 seconds 2/60 to 3/60 seconds R Shutter Opening Closure Closure G Shutter Closure Opening Closure B shutter unit Closure Closure Opening

5 is a diagram illustrating the configuration of an image display unit provided in a color image acquisition apparatus according to an embodiment of the present invention.

Referring to FIG. 5 , in an embodiment of the present invention, the image display unit 170 includes a charge-coupled device (Charge-Coupled Device) 171 , a backlight 173 , and an LCD panel 175 .

The charge-coupled device 171 is one of the solid-state imaging devices and is an image sensor having an integrated circuit including tens of millions of pixels that converts light energy into an electrical signal. The fluorescence of the image amplifier tube 150 shown in FIG. 2 is Contrast information of an image is received from the screen 155 .

Here, coupling means for connecting the fluorescent screen 155 of the image amplifier tube 150 and the charge-coupled device 171 may be included, and the coupling means is a lens coupling using a lens optical system or an optical fiber couple using an optical fiber. A ring method can be used.

The image optically amplified through the image amplifier tube 150 is imaged on the charge-coupled device 171 through a coupling means, and is electronically scanned in the charge-coupled device 171 to convert it into an electrical signal to output an image. there will be

In an embodiment of the present invention, the LCD panel 175 is configured to receive image contrast information from the charge-coupled device 171 .

As an embodiment, the charge-coupled device 171 transmits the contrast information constituting the image to the controller 180, and transmits the contrast information from the controller 180 to the LCD panel 175 to reproduce the contrast (black and white image) of the image. can be configured to do so.

Here, as the LCD panel 175 , a commercially available LCD panel may be used, however, it is configured as a monochromatic transmissive type without a color filter.

As described above, the monochromatic transmissive LCD panel 175 implements only the contrast of a color image through opening/closing operation for each pixel. In the present invention, in order to reproduce a color image, a backlight 173 that time-divisions R, G, and B and emits light toward the rear side of the LCD panel 175 is included.

Here, the backlight 173 generates a color image synchronized with the input color image by emitting corresponding R, G, and B light based on the driving information of the R, G, and B of the shutter unit 130 to the LCD panel 175 . can be implemented in the FSC method.

In addition, it is preferable that the backlight 173 according to an embodiment of the present invention is composed of an RGB LED light source and is an edge-lit type in which the LED light source is disposed on the side of a light guide plate (LGP). Do. In this case, the charge-coupled device 171 and the LCD panel 175 can be disposed as close to each other as possible, thereby reducing the thickness of the product.

As described above, the color image acquisition apparatus 100 according to an embodiment of the present invention receives an image for each color, and includes a shutter unit capable of dividing the image according to the input color according to the time, so that the high-resolution FSC method is used. of color images can be obtained.

In addition, by including an image amplifier tube in the color image acquisition device 100, it is possible to have a more improved night monitoring capability.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions are possible within the range that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: image acquisition device
110: video input unit
130: shutter unit
150: image amplifier tube
151: photocathode plate
153: microchannel plate
155: fluorescent screen
170: image display unit
171: charge-coupled device
173: backlight
175: LCD panel
180: control unit

Claims (5)

an image input unit for receiving an external image;
an image amplifier for receiving and amplifying an image from an image input unit; and
Including; an image display unit for receiving the amplified image from the image amplifier tube and displaying it on the screen;
The image input unit includes three transparent bodies each having R (Red), G (Green), and B (Blue) colors,
A shutter unit is positioned between the image input unit and the image amplifier tube so that the image having one of R, G, and B colors is divided according to time through the transparent body,
video amplifier,
A photocathode that receives an image and emits electrons, a micro channel plate that amplifies and emits electrons emitted from the photocathode tube, and a phosphor screen that emits light by the emitted amplified electrons including,
video display unit,
A charge-coupled device that receives image contrast information from the fluorescence screen of the image amplifier;
An LCD panel that receives image contrast information from a charge-coupled device;
It includes a backlight that time-divisions R, G, and B to emit light to the rear side of the LCD panel,
LCD panel is a monochromatic transmissive type without color filters
The backlight emits light corresponding to R, G, and B based on driving information of R, G, and B of the shutter unit, a color image acquisition device.
The method according to claim 1,
shutter part,
A color image acquisition device comprising a pair of glass plates each comprising a transparent electrode plate formed of an indium tin oxide (ITO) electrode, and liquid crystal between the glass plates.
3. The method according to claim 2,
shutter part,
A color image acquisition apparatus for dividing an image input to an image input unit by color for a predetermined unit time.
4. The method according to claim 3,
Color image acquisition device,
Color image acquisition, configured so that each R, G, B image passing through the R, G, B transparent body, including the optical body formed integrally or separately with the transparent body, is imaged at the same position and size on the photocathode plate of the image amplifier tube Device.

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