JPH03273285A - Display device - Google Patents

Abstract

PURPOSE:To miniaturize the display device and to improve resolution by constituting the display device of a color image display device for one horizontal scanning line provided with three primary colors emitting means arranged in parallel with a horizontal scanning line section and an optical system means for deflecting image light for one scanning line projected from the display device in the vertical direction. CONSTITUTION:The display device is constituted of a cathode ray tube (CRT) 1 provided with three primary colors emitting means 14B, 14R, 14G arranged in parallel with the horizontal scanning line section and three electron gans 4B, 4R, 4G making pairs with the means 14B, 14R, 14G, a horizontally deflecting coil 2, the optical system 16 for deflecting image light for one horizontal scanning line projected from the CRT 1 in the vertical direction synchronously with a vertically synchronizing signal included in an image signal, and a driving device 17 for driving the optical system 16. Cathode rays are projected from the three electron gans 4B, 4R, 4G and deflected in the horizontal direction by the coil selectively emit the corresponding light emitting means 14B, 14R, 14G. In addition, image light raidated from the CRT 1 is deflected in the vertical direction by the optical system 6 to constitue an image. Thus, the display device can be miniaturized and high resolution can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device that is compact and displays high-resolution color television images.

(Prior Art) Conventionally, this type of display device includes a color liquid crystal display and a beam index type color cathode ray tube.

[Problem to be solved by the invention]

However, among the above display devices, color liquid crystal display devices are difficult to miniaturize pixels.
Even the smallest existing pixel size is several tens of microns.
It is square. When using this to construct a small display with a diagonal of about 20W for the viewfinder of a television camera, the number of pixels in the horizontal direction of the screen is 300 to 400.
The maximum number of pixels in the vertical direction is 250M pixels. The number of pixels in the horizontal direction is the total value of the three colors red, green, and blue, so it is 1
The number of colors per color is 1/3 of the above, and it is only possible to construct a display whose resolution is significantly lower than the resolution of the camera's imaging device.

Also, in terms of vertical resolution, color LCDs have
Of the approximately 500 effective scanning lines of the NTSC system, 2
It is customary to provide only 50 pixels, which is problematic in that it is not sufficient for the purpose of focusing a television camera.

Furthermore, another problem with color liquid crystal display devices is that the manufacturing yield is low.

This means that in order to obtain a good contrast ratio, at least 11ff film transistors are provided for each pixel, but even if the individual failure rate of these thin film transistors is 3/100,000 pixels. This is because the entire color liquid crystal display device has a defective rate of 30%, which is a factor that hinders price reduction.

In addition, in a normal cathode ray tube, the area of the pixel, or phosphor, is about 20 times that of a color liquid crystal display device.
There were even more obstacles to using it in display devices that required small size and high resolution.

The present invention was made to solve the above-mentioned problems, and aims to provide a display device that can be made smaller, have higher resolution, and lower cost.

[Means to solve the problem]

A display device according to a first aspect of the present invention includes a cathode ray tube having three primary color light emitting means arranged in parallel in a horizontal scanning line segment and three electron guns paired with these light emitting means, and a horizontal deflection coil. The optical system includes an optical system that vertically deflects one horizontal scanning line of image light emitted by a cathode ray tube in synchronization with a Wi imitation multiplication signal vertical synchronization signal, and a driving device thereof.

A display device according to a second invention includes a cathode ray tube according to the first invention, a light emitting means of three primary colors arranged in parallel to a horizontal scanning line segment, a pair of electrostatic vertical deflection plates, and an electron gun. It is composed of

A display device according to a third aspect of the present invention includes a cathode ray tube, a light emitting means of three primary colors arranged in parallel to a horizontal scanning line segment, a pair of electrostatic vertical deflection plates, and a large number of cathode rays arranged in a horizontal direction. The optical system is composed of a plurality of shutter electrodes that selectively allow one of the images to pass through, and is equipped with an optical system that vertically deflects one horizontal scanning line of image light emitted by a cathode ray tube, and a driving device for the optical system.

A display device according to a fourth invention includes the cathode ray tube according to the third invention, three primary color light emitting means arranged in parallel to a horizontal scanning line segment, three grids having openings in the horizontal direction, and a horizontal It is composed of a plurality of shutter electrodes that selectively pass one set of a large number of cathode ray groups lined up in the direction.

A display device according to a fifth aspect of the present invention includes the cathode ray tube according to the third aspect of the present invention, light emitting means of three primary colors arranged in parallel to the horizontal scanning line segment, and light emitting means of three primary colors provided corresponding to the light emitting means of the three primary colors. It is composed of three anodes, and a plurality of shutter electrodes that selectively pass one set of a large number of cathode ray groups arranged in the horizontal direction. .

[For production]

In the first invention, cathode rays are emitted from three electron guns and deflected in the horizontal direction by a horizontal deflection coil to cause the corresponding light emitting means to selectively emit light.

The image light emitted by the cathode ray tube is then deflected in the vertical direction by an optical system to form an image.

In the second invention, the cathode rays emitted from the electron gun are vertically deflected by an electrostatic vertical deflection plate and horizontally deflected by a horizontal deflection coil to cause the light emitting means to selectively emit light. Then, similarly to the first invention, an image is constructed using an optical system.

In the third invention, the emitted cathode rays are deflected in the vertical direction by an electrostatic vertical deflection plate, and are substantially deflected in the horizontal direction by being selectively passed through a shutter electrode, and the light emitting means is selectively deflected. The image light obtained by emitting light is formed into an image by an optical system.

In the fourth invention, the emitted cathode rays pass through the openings of the grid corresponding to the three primary colors and are substantially deflected in the horizontal direction by the shutter electrode, causing the light emitting means to selectively emit light. The obtained image light is then configured into an image by an optical system.

In the fifth invention, the emitted cathode rays are substantially horizontally deflected by the shafter electrode, and the three anodes cause the light emitting means of three primary colors to selectively emit light, and the obtained image light is transmitted to the optical system. is composed into an image.

Embodiment] FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a perspective view. In these figures, 100 indicates a color image display device for one horizontal scanning line, 1 is a cathode ray tube which is a component thereof, 2 is a horizontal deflection coil, and 3 is a focusing lens. # On one end of the polar ray tube 1, there are three cylindrical electron guns 4B, 4R, 4 for blue (B), red (R), and green (G).
G are provided in the vertical direction, and each heater 5B.

5R and 5G are connected to the power supply 6. Also, 7B, 7
R, 7G are the cathodes of the electron gun 4B, 4R, 4G, 8B,
8R, 8G are grid, 9B.

9R and 9G are anodes, and cathodes 7B and 7R.

7G is driven by the image signal amplifier 10G, IOR, and IOB, and the voltage of the power supply 12 is applied to the anodes 9B, 9R, and 9G via the terminal 11. Reference numeral 13 denotes a shadow mask having a slit provided in the deflection direction. 14B,
14R and 14G are phosphors serving as light emitting means for three primary colors provided on the other end side of the cathode ray tube l facing the electron guns 4B, 4R and 4G; It has an R and C arrangement.

Further, the horizontal deflection coil 2 is supplied with a triangular wave current from the power source 15 in both upper and lower directions to generate a magnetic field and deflect the cathode rays in the horizontal direction. The focusing lens 3 is composed of two cylindrical lenses, and focuses the image light obtained by the cathode ray tube 1 in the vertical direction to reduce the width of the scanning line.

Furthermore, 16 is a polygon prism provided for optical vertical scanning, and this example shows a rectangular prism.

Reference numeral 17 denotes a polygon prism driving device for driving the polygon prism 16, which rotates the polygon prism 16 at a speed of 1/4 of the vertical repetition frequency of the television simulator signal. Reference numeral 18 denotes an eyepiece lens for enlarging the small television screen to an appropriate size for easy viewing.

Next, the operation of the above m-precept display device will be explained. Heaters 5B, 5R, 5G are energized, and cathode 7B
, 7R, 7G are heated, the cathode rays are transmitted to grids 8B, 8
It is emitted from the holes R and 8G.

This amount is the image signal amplifier 10B, IOR, 10 (.

It is determined by the potentials of cathodes 7B, 7R, and 7G driven by. The emitted cathode rays are sent to the anodes 9B, 9
After being accelerated by R and 9G and deflected by the horizontal deflection coil 13, the phosphors 14B and 14R pass through the slit of the shadow mask 13.

14G is selectively emitted. In addition, here, the phosphor 14
Since B, 14R, and 14G are arranged in the vertical direction,
The resolution can be tripled compared to the conventional arrangement in which RGB phosphors are arranged horizontally, resulting in a decrease in resolution.

Obtained with a cathode ray tube! The j tracing light is vertically focused by the focusing lens 3 and is incident on the polygon prism 16.

Now, if the length of one side of the polygon prism 16 is d, the inclination with respect to the incident light is θ, and the refractive index of the polygon prism is n, then the vertical displacement y of the output light of the polygon prism 16 is y m d sin θ (1 -1-), and the parameters of the polygon prism 16 are determined so that the ratio of the horizontal scanning line to the horizontal width of the color image display device 100 becomes a predetermined aspect ratio of the television screen. has been done.

Note that the light path in FIG. 1 is illustrated as a paraxial ray. In the case of only paraxial rays, only the central part of the vertical scan can be seen by the eye, which is disadvantageous. but,
In reality, the output light of the color image display device 100 for one horizontal scanning line has a certain degree of spread, so within the range of ten functions of vertical scanning required in this embodiment, there is no problem. Does not occur.

A display device configured in this way can obtain a horizontal resolution comparable to the resolution of an imaging device, and can also display the full number of vertical scanning lines determined by the television dibon system without being halved. This makes it suitable as a viewfinder.

FIGS. 3 and 4 are diagrams showing a second embodiment. In these figures, 19 is a cathode ray tube, and one electron gun is provided at one end of the cathode ray tube.

5 is a heater connected to tl[6, 7 is a cathode, and the potential of this cathode 7 is the image signal amplifier 10B.

The output of 10R, IOC; is switched by switch 20 and applied. 8 is a grid, 21U and 21D are a pair of St vertical deflection plates facing each other, and these deflection plates 21U and 21D are for deflecting cathode rays in the vertical direction by deflection [1[22], and a signal is synchronized with the switch 20. ing. Further, a gold rs film as an anode 9 is formed on the surfaces of the phosphors 14B, 14R, and 14G, and this is called a metal back. Furthermore, the anode 9 is connected to the terminal 11
Accelerate through 1! source 12. Numeral 3 is a focusing lens as in the first embodiment, and this focusing lens 3 and cathode ray tube 19 constitute a color image display device 200 for one horizontal scanning line. Since the other configurations are the same as those of the first embodiment, corresponding parts are given the same reference numerals and their explanations will be omitted.

In the display device configured as described above, when the cathode 7 is heated by energization of the heater 5, cathode rays are emitted from the holes in the grid 8, and the cathode rays are transmitted through the deflection plates 21L1.
It is deflected in the vertical direction at 21D. Here, the deflection plate 21U
, 21D is the signal of the deflection power supply 22 applied to the switch 2.
Image signal amplifier JOB, IOR, JO by switching 0
B of G.

Since it is synchronized with the R and G outputs, the phosphors 14B, 14R, and 14G corresponding to the B, R, and G outputs can be caused to emit light. The other operations are similar to the first embodiment, and in this embodiment as well, a horizontal resolution comparable to that of an imaging device can be obtained, and the number of vertical scanning lines determined by the television system can be fully displayed without being halved. can be released.

In addition, the line color light emission in the second embodiment is performed by switching between three colors, and the speed is three times the frequency of the video signal to be reproduced.
However, another method is to perform horizontal scanning at three times the frequency and transmit the time-compressed signal to 1/3 at the switch 2.
0, the cathode potential may be applied by switching in the order of BRG, etc.

5 and 6 are diagrams showing the third embodiment. In FIG. 0, numeral 300 represents a color image display device for one horizontal scanning line, and numeral 23 represents a cathode ray tube. Further, the heater 51 is connected to a DC power source 61, and the grid 81 is supplied with the outputs of the image signal amplifier 10B, IOR, and LOG via the switch 20.

Further, the openings of the grid 81 may be a large number of holes or slits formed in the horizontal direction. Reference numeral 24 denotes a plurality of shutter electrodes, which are arranged in parallel in the horizontal direction and each has an opening. This shutter electrode 24 is connected to a DC power source 26 via a switch 25 that is linked with the switch 20, and by switching the switch 25, the emitted cathode rays are selectively passed through, and are brought into a state similar to horizontal deflection. Since the other configurations are the same as those of the second embodiment, corresponding parts are given the same reference numerals and their explanations will be omitted.

In the display device configured in this way, cathode rays are emitted from the holes in the grid 81, as in the second embodiment, and the cathode rays are deflected in the horizontal direction by the shutter electrode 24 by switching the switch 25. , and is deflected in the vertical direction by deflection plates 21U and 21D. Since the signals of the deflection power supply 22 and the switches 20.25 are synchronized, the image signal amplifiers 10B and 10R are similar to the second embodiment.
Phosphor 14B compatible with 10G B, R, G output.

14R and 14G can be emitted.

7 and 8 show a fourth embodiment, which has three grids for G, R, and B in the vertical direction,
By passing cathode rays through these grids, the corresponding phosphors are made to emit light. That is, 82G.

Grids 82R and 82B each have a large number of holes in the horizontal direction, and are arranged for G, R, and B in order from the top, and are image signal amplifiers 10G and IOR, respectively.

A 10B output is applied. In addition, the grids 82G, 82R, 82B in this case may also be composed of a large number of slits outside the formal clothes, and 27 is a plurality of shutter electrodes arranged in parallel in the horizontal direction, and the grids 82G, 82R, 82B, respectively.
It has three openings in the vertical direction corresponding to 82B. Further, numeral 400 indicates a color authenticity display device for one horizontal scanning line consisting of a cathode ray tube 28 and a focusing lens 3, and the other configurations are the same as in the third embodiment.

In the fourth embodiment configured as described above, the cathode rays from the heater 51 are arranged in the grids 82G, 82R in accordance with the image signals output from the image signal amplifiers JOB, IOR, JOG.
, 82B, and is further deflected in the horizontal direction by the shutter electrode 27 by switching the switch 25, and the corresponding phosphor 14B.

14R and 14G are made to emit light. That is, in the line color light emission described above, the cathode rays move horizontally in groups of three colors to obtain image light for one horizontal scanning line.

FIGS. 9 and 10 show a fifth embodiment, in which G, R, and B phosphors 14G and 14R are used.

14B and an anode 9G provided correspondingly.

Image signal amplifier 10G and IOR at 9R and 9B.

It is designed to obtain image light corresponding to the output of 10B. That is, anodes 9G and 9R.

9B is G, R, B phosphor 14G.

It is provided at the other end of the cathode ray tube 29 together with 14R and 14B, and the outputs of the image signal amplifiers 10G, IOR, and IOB are applied thereto, respectively.

Reference numeral 500 indicates a color authenticity display device for one horizontal scanning line composed of a cathode ray tube 29 and a focusing lens 3, and the other configurations are the same as in the fourth embodiment.

In the fifth embodiment configured as described above, the cathode rays from the heater 51 are connected to the shutter electrode 2 by switching the switch 25.
7 and horizontally deflected at the anodes 9G, 9R19
Image signal amplification 310G applied to B, IOR, IOB
The image signals of the corresponding phosphors 14G, 14R, 1
Make 4B emit light. That is, in this embodiment as well, the line color emission is performed using cathode rays of three colors, as in the fourth embodiment.
They move horizontally in pairs to obtain image light for -horizontal scanning lines.

FIG. 11 is a diagram showing a sixth embodiment in which vertical deflection is performed by a movable mirror 30 instead of the polygon prism 16 in the first to fifth embodiments.

That is, the movable mirror 30 is fixed to a galvanometer driven by a galvanometer-type movable mirror drive device f31 that generates a sawtooth wave with a vertical period, and operates in the same manner as the polygon prism 16.The length of this movable mirror 30 is Phosphors 14B, 14R of cathode ray tubes 1, 19, 23.28°29
, 14G.

FIG. 12 shows a seventh embodiment in which a rotary polygon 32 is used in place of the movable mirror 30 of the sixth embodiment.

Further, 33 is a rotary polygon mirror drive device that drives the rotary polygon mirror 32. In this embodiment, since the vertical deflection is performed by the rotation of the rotary polygon 32, the mirror surface is changed in synchronization every vertical synchronization period of the image signal. That is, if the rotating angle mirror 32 is an N-angle mirror, the necessary vertical deflection can be obtained by setting its rotation frequency to 1/N of the vertical synchronization frequency of the image signal.

As described above, in the first to seventh embodiments, the focusing lens 3 is used to narrow the vertical width of *m light for one horizontal scanning line,
The aim is to achieve a vertical resolution of nearly 500 lines. Therefore, if the heights of the phosphors 14B, 14R, and 14G are sufficiently small, the focusing lens 3 is not necessarily required.

Furthermore, although the tracing is magnified using the eyepiece lens 18, it is possible to obtain an image without the eyepiece lens 18 if magnification is not necessary.

Further, the display device of the present invention can be applied to a projector, and FIG. 13 is a diagram showing the configuration thereof. That is, there is a position where the actual image is connected at a distance of focal length f or more from the eyepiece lens 18, and when the screen 34 is provided at this position, an image can be obtained on the screen 34. Furthermore, '1I414
The figure shows another embodiment when applied to a projector. In this embodiment, the focusing lens 35 is composed of a cylindrical concave lens, and the phosphor 14 is a single GRB.
The filters 60G, 60R, and 60B are used to configure three primary color light emitting means.

It should be noted that such a projector can be applied not only to the configurations of the first to fifth embodiments but also to the configuration of the sixth and seventh embodiments, and the converging lens 35 and the phosphor 1 of the other embodiments described above can also be applied.
4 and filters 60G and 60R.

The configuration of the light emitting means made of 60B is also applicable to the first to sixth embodiments.

〔Effect of the invention〕

As described above, according to these inventions, the display device includes a color image display device for one horizontal scanning line having light emitting means of three primary colors arranged parallel to the section of the horizontal scanning line; The display device is configured with an optical system that vertically deflects the N patterned light beams for one scanning line, and has the effect of providing a compact, high-resolution, and inexpensive display device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a display device according to a first embodiment of the present invention, FIG. 2 is a perspective view of the same display device, and FIG. 3 is a block diagram of a display device according to a second embodiment of the present invention. Figure 4 is a perspective view of the same display device, and Figure 5 is a perspective view of the same display device.
The figure is a configuration diagram of a display device according to a third embodiment of the present invention, and FIG. 6 is a perspective view of the same display device.
FIG. 8 is a perspective view of the display device according to the fourth embodiment of the present invention, FIG. 9 is a configuration diagram of the display device according to the fifth embodiment of the present invention, and FIG. 10F! ! J is a perspective view of the display device,
FIG. 11 is a block diagram of a display device according to a sixth embodiment of the present invention, FIG. 12 is a block diagram of a display device according to a seventh embodiment of the present invention, and 13th FI! J and!
141! I is a configuration diagram when the display device of the present invention is applied to a projector. 1.19,23.28.29...Cathode ray tube, 2...
Horizontal deflection coil, 4.4B, 4R, 4G...electron gun,
9... Anode, IOC, IOR, JOB... Image signal amplifier, 14.14B, 14R, 14G... Fluorescent substance, 16... Polygon prism, 17... Polygon prism drive device, 21tJ, 21D ... Electrostatic vertical deflection plate, 22 ... Deflection power supply, 24.27 ... Shutter electrode, 30 ... Movable mirror, 31 ... Movable mirror drive device,
32... Rotating polygon mirror, 33... Rotating polygon mirror drive device, 82G. 82R, 82B...Grid, 100, 200300
．． 400, 500... - color image display device for horizontal scanning lines. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (5)

[Claims] (1) A cathode ray tube that has three primary color light emitting means arranged parallel to the horizontal scanning line segment and three electron guns paired with these light emitting means, and the cathode rays emitted by this cathode ray tube are directed horizontally. A display including a horizontal deflection coil that deflects, an optical system that deflects one horizontal scanning line of image light output from the cathode ray tube in the vertical direction in synchronization with a vertical synchronization signal of the image signal, and a drive device for this optical system. Device. (2) A cathode ray tube that has three primary color light emitting means arranged parallel to the horizontal scanning line segment, a pair of electrostatic vertical deflection plates, and an electron gun, and deflects the cathode rays emitted by this cathode ray tube in the horizontal direction. A display device comprising a horizontal deflection coil, an optical system that vertically deflects one horizontal scanning line of image light output from the cathode ray tube in synchronization with a vertical synchronization signal of an image signal, and a drive device for this optical system. (3) Three primary color light emitting means arranged in parallel to the horizontal scanning line segment, a pair of electrostatic vertical deflection plates, and a plurality of light emitting means arranged in parallel in the horizontal direction to selectively pass one of the many cathode rays. A cathode ray tube having a shutter electrode of equipped display device. (4) Three primary color light emitting means arranged parallel to the horizontal scanning line segment, and three primary color light emitting means having an opening in the horizontal direction and corresponding to the three primary colors.
A cathode ray tube has a plurality of shutter electrodes that selectively pass one set of a large number of cathode ray groups lined up in the horizontal direction. A display device equipped with an optical system that deflects vertically in synchronization with a vertical synchronization signal, and a drive device for this optical system. (5) Select a set of three primary color light emitting means arranged parallel to the horizontal scanning line segment, three anodes corresponding to the three primary color light emitting means, and a large number of cathode ray groups arranged in the horizontal direction. A cathode ray tube having a plurality of shutter electrodes to pass through, an optical system that deflects one horizontal scanning line of image light output from the cathode ray tube in a vertical direction in synchronization with a vertical synchronization signal of an image signal, and this optical system. A display device with a drive device.