KR0133466B1 - Stereoscopic display apparatus - Google Patents

Abstract

The present invention relates to a stereoscopic image display device, and a conventional stereoscopic image device is a device for reproducing a stereoscopic image photographed using a right camera and a left camera, using a polarizing plate or arranged perpendicular to the ground and having the same width By using multiple slits grating and alternating opaque parts and two projectors, there was a disadvantage that it is not portable. In order to solve this disadvantage, the present invention digitally processes three-dimensional image information divided into right and left by using only one projector and a digital processing device, and alternately synthesizes them at regular intervals to display each three-dimensional image information at different angles. It is to provide a three-dimensional image display device that allows to enjoy a three-dimensional image.

Description

Stereoscopic display

1 is a block diagram of a conventional stereoscopic image display device.

2 is a block diagram of a liquid crystal panel of FIG.

3 is a state diagram of pixel arrangement of color filters in FIG. 2;

4 is a block diagram of a stereoscopic image device using conventional polarization.

5 is a block diagram of a conventional stereoscopic image reproduction screen.

6 is another configuration diagram of the stereoscopic image device using FIG.

7 is a block diagram of a stereoscopic image display device of the present invention.

8 is a side view of the liquid crystal panel of FIG.

9 is a cross-sectional view of the liquid crystal panel of FIG.

(A) to (e) of FIG. 10 are video information output state diagrams of respective parts of the present invention.

The (a) 11 degrees to (E) is in the present invention the three-dimensional image signals (S _R + L), the pixel (R, G, B) and a pixel (P _N) array, pixel sampling frequency (fs) and his division Comparison waveform diagram of clock (fs / 3, fs / 6).

* Explanation of symbols for main parts of the drawings

100: lamp 101: liquid crystal panel

101-1, 101-8: polarizers 101-2, 101-6: transparent glass,

101-3: signal electrode 101-4: liquid crystal,

101-5: scanning electrode 101-7: color filter,

101-9: Translucent plate 101-10: Lenticular lens

102: liquid crystal panel driver 103: control unit

104: power supply unit 110: three-dimensional image digital processing unit

111: 3 minute cycle 112: 2 minute cycle

113, 114: analog / digital converter 115: selector

116: digital to analog converter 117: switching unit

SW1: Switch

The present invention relates to a liquid crystal TV, the patent by recombining the three-dimensional image information separated by the right and left to composite image information to reproduce the three-dimensional image to eliminate the inconvenience to wear and watch glasses for stereoscopic images. The present invention relates to a stereoscopic image display device.

FIG. 1 is a block diagram of a conventional stereoscopic image display device. As shown in FIG. 1, a lamp 1, which is a light source, and a liquid crystal panel converting an electrical image signal into an optical image signal according to light emitted from the lamp 1 2), a liquid crystal panel driver 3 for converting the externally supplied composite video signal CS into an electrical video signal and supplying the liquid crystal panel 2 to the liquid crystal panel 2, and a power supply unit for supplying power from the outside to each part of the system. (5) and a control unit (4) which collectively controls the entire system in accordance with the power of the power supply unit (5), wherein the liquid crystal panel (2) is a longitudinal (from the incident side, as shown in FIG. Horizontal polarizer 6, transparent glass 7, signal electrode 8, liquid crystal 9, scan electrode 10, transparent glass 11, color filter 12, horizontal polarized light

It consists of the board 13 and the translucent board 14 which scatters light.

On the other hand, there are two methods of arranging each of the color filters red, green, and blue of the color filter 12, a stripe method and a delta method. As shown in FIG.

The operation of the conventional stereoscopic image display device configured as described above is as follows.

That is, when the power is supplied by the power supply unit 5 and the composite image signal CS is input, the liquid crystal panel driver 3 changes the composite image signal CS into an electrical image signal under the control of the control unit 4 so that the liquid crystal Supply to the panel (2).

At this time, the incident light projected by the lamp 1 passes through the longitudinal (lateral) polarizing plate 6 of the liquid crystal panel 2, the transparent glass 7, the signal electrode 8, and the liquid crystal 9, and then the scan electrode again. 10, the transparent glass 11, the color filter 12 as shown in FIG. 3 and the transverse polarizing plate 13 through the translucent plate 14 to convert the electrical image signal into an optical image signal, and The optical image signal is displayed on the screen so that an image appears.

4 is a configuration diagram of a stereoscopic image apparatus using a conventional polarization, and as shown therein, a right camera 15 and a left camera 16 which measure an object on the right and left sides to make a parallax effect in the lateral direction. A right projector 18 and a left projector 19 for converting an electric video signal output from the stereoscopic image generator 17, the right camera 15 and the upper camera 16 into an optical video signal, respectively, and the right A longitudinal polarizer 20 through which only the longitudinal component of the optical image signal output through the projector 18 is passed, and a transverse polarizer 21 through which only the lateral ice component of the optical image signal output from the left projector 19 is passed; It consists of a stereoscopic image reproducing unit 24 composed of a projection lens 22 for projecting the optical image signal output from the polarizing plate 20 and the horizontal polarizing plate 21 on the screen 23, Referring to the following:

The prior art configured as described above is a method of reproducing an image signal photographing a right image and a left image by using two cameras.

That is, in order to create a parallax effect in the lateral direction in the stereoscopic image generator 17, the object is photographed with a certain distance from the right camera 15 and the left camera 16.

Then, the right electrical image signal transmitted from the stereoscopic image generating unit 17 is converted into an optical signal through the right projector 18 of the stereoscopic image reproducing unit 24 and projected, and the projected optical image signal is Only the optical image signal of the longitudinal component is passed by the longitudinal polarizer 20.

The longitudinal optical image signal is projected onto the screen 23 by the projection lens 22 to form a right image.

The left electric image signal transmitted from the stereoscopic image generator 17 is converted into an optical image signal through the left projector 19 of the stereoscopic image reproducing unit 24 and is projected. Only the optical image signal of the transverse component passes through the horizontal polarizing plate 21.

Such an optical image signal in the lateral direction is projected onto the screen 23 by the projection lens 22 to form a left image.

Accordingly, two image optical image signals projected on the screen 23 are synthesized to reproduce one image.

When the image reproduced as described above is viewed with the polarizing plate glasses 25, the right optical image signal passing through the spectacle lens 25 ′ of the longitudinal polarizing plate enters the right eye, and the spectacle lens of the transverse polarizing plate is used for the left eye. The left image signal in the transverse direction, which passes through 25), enters the retina and recognizes the integrated stereoscopic sense in the center of the optic nerve of the observer.

5 is a detailed configuration diagram of a stereoscopic image reproducing screen. As shown in FIG. 5, the first screen 26, the longitudinal polarizer 27 ′, and the horizontal polarizer 27 have the same width and are alternately perpendicular to the ground. A second polarizing plate 27 arranged to alternately separate longitudinal and lateral image signals passing through the first screen 26 with the same width, and a second image forming an image signal separated from the multiple polarizing plates 27. A translucent screen 28 and a third lenticular screen 29 for displaying a stereoscopic image by projecting the stereoscopic light information formed on the second translucent screen 28 in the left and right directions, which uses a polarizing plate glasses It is a stereoscopic image reproducing screen having multiple polarizing plates arranged vertically with respect to the ground and alternately arranged with the same width so that stereoscopic images can be viewed without being displayed.

FIG. 6 is a diagram illustrating an embodiment in which the stereoscopic image reproducing screen is applied. Referring to FIG. 6, the optical right image signal and the optical left image signal projected through the right projector 18 and the left projector 19 are respectively described. Only the right image signal of the longitudinal component is passed through the longitudinal polarizer 20, and only the left image signal of the lateral component is passed through the horizontal polarizer 21.

The longitudinal right optical image signal and the horizontal left optical image signal pass through the first screen 26 through the projection lens 22, respectively, to allow the longitudinal polarizing plate 27 ′ and the horizontal polarizing plate 27 of the multiple polarizing plate 27 to pass through. Are alternately separated by the same width, and image signals thus separated are formed on the second translucent screen 28.

The stereoscopic optical image information formed by the second translucent screen 28 takes independent light paths in the left and right directions through the third lenticular screen 29 and reaches the viewer's eyes.

As described above, stereoscopic image signals are generated using two cameras and stereoscopic images are reproduced using multiple slits.

However, the conventional stereoscopic image signal described above is a device for reproducing a stereoscopic image photographed using a right camera and a left camera, using a polarizing plate or vertically arranged with respect to the ground, and having transparent and opaque parts of the same width alternately arranged. By using a multi-slit lattice, and using two projectors there was a disadvantage that can not be carried.

In order to solve this disadvantage, the present invention digitally processes three-dimensional image information divided into right and left by using only one projector and a digital processing device, and alternately synthesizes the neighbors at regular intervals, and the three-dimensional image information has different wide angles. The present invention provides a stereoscopic image display device that displays a stereoscopic image.

The present invention receives a light source means, a composite image signal CS, a right image signal S _R , and a left image signal S _L , and digitalizes the right image signal S _R and the left image signal S _L. the image processing generates a three-dimensional image signals (S _{R + L)} and, in response to the control signal the composite video signal (CS) and the three-dimensional image signals (S _{R + L)} for selecting and outputting the stereoscopic image digital processing means, the three-dimensional that A liquid crystal panel driving means for driving a liquid crystal panel by converting a signal output from the image digital processing means into an electrical image signal, and converting an output signal of the liquid crystal panel driving means into a photosynthetic image signal according to the light of the light source means to display a stereoscopic image And a power supply means for supplying electric power from the outside to each unit, and a control means for overall control of the entire system. The three-dimensional image processing means comprises three pixel sampling frequencies fs of the liquid crystal panel. Busy The first division means, the second division means for dividing the output signal of the first division means by two, and the right image signal S _R and the left image signal S _L according to the division clock of the first division means. The first and second signal conversion means for digital conversion (S _R ') (S _L ') and the right digital image output from the first and second signal conversion means according to the division clock of the second division means. Signal selection means for alternately selecting the signal S _R 'and the left digital video signal S _L ' and synthesizing it into a stereoscopic digital video signal S _{R + L} ', and according to an output signal of the first division means. Third signal changing means for analog-converting the output signal S _{R + L} ′ of the signal selecting means into a stereoscopic image signal S _{R + L} , and the third signal changing means according to a control signal of the control means. And switching means for switching the stereoscopic image signal S _{R + L} and the composite image signal CS.

The present invention configured as described above will be described in detail with reference to the accompanying drawings as follows.

7 is a block diagram of a stereoscopic image display device according to the present invention. As shown therein, the lamp 100, the composite image signal CS, the right image signal S _R , and the left image signal S _L as a light source are illustrated. input receives the right image signal (S _R) and the up-image signal (S _L) a digital to image processing and generates three-dimensional image signals (S _{R + L),} the composite video signal (CS) and a stereoscopic video signal according to the control signal (3) the stereoscopic image digital processor 110 for selecting and outputting (S _{R + L} ) and a liquid crystal panel driver for driving the liquid crystal panel 101 by converting the signal output from the stereoscopic image digital processor 110 into an electrical image signal ( 102, the liquid crystal panel 101 for displaying a stereoscopic image by converting the output signal of the liquid crystal panel driver 102 into an optical image signal according to the light of the lamp 100, and a power supply unit for supplying power from the outside to each unit. (104) and control unit 103 for overall control of the system The three-dimensional image digital processing unit 110 divides the pixel sampling frequency fs of the liquid crystal panel 101 into three divisions 111 and two divisions of two output signals of the three divisions 111. Analog / Digital conversion S _R ′ (S _L ′) of the right image signal S _R and the left image signal S _L , respectively, according to the period 112 and the division clock of the three divider 111. The right digital video signal S _R ′ and the left digital output from the analog / digital converter 113 and 114 according to the dividing clock of the digital divider 113 and 114 and the divider 112. the video signal of the selector 115 in accordance with an output signal of the selector 115, the three dividers 111 (S _L ') selected by the shift to three-dimensional digital image signal (S _{R + L'} synthesized in) A digital / analog converter 116 for converting an output signal S _{R + L} 'into a stereoscopic image signal S _{R + L} and a digital / analog converter according to a control signal of the controller 103; 116) It constitutes a power signal (S _{+ R L)} and the switching unit 117 to switch the composite video signal (CS).

On the other hand, the switching unit 117, when judging the composite video signal CS by judging by the control unit 103, the connection of the switch SW1 becomes ⓑ, and when processing the three-dimensional video signal (S _{R + L} ) The connection of the switch SW1 becomes ⓐ.

8 is a side configuration diagram of the liquid crystal panel according to the present invention, and FIG. 9 is a cross-sectional configuration diagram of the liquid crystal panel. As shown therein, the longitudinal (lateral) polarizing plate 101-1 and the transparent glass 101- 2), signal electrode 101-3, liquid crystal 101-4, scan electrode 101-5, transparent glass 101-6, color filter 101-7, horizontal (vertical) polarizer 101- 8), a translucent plate 101-9 and a lenticular lens 101-10, wherein the lenticular lens 101-10 includes two pixel bands R, G, and B of the color filter 101-7. It is formed by forming one curved surface.

When described in detail with reference to the accompanying drawings the operation and effects of the present invention configured as described above.

The present invention can receive and process a composite video signal CS, and can generate a stereoscopic video signal S _{R + L by} receiving two signals, a right video signal S _R and a left video signal S _L. have.

That is, when the right image signal SR and the left image signal SL are input to the stereoscopic image digital processing unit 110 as shown in FIGS. 10A and 10E, the analog / digital conversion unit 113 receives the 10th signal. As shown in (b) of FIG. 2, the right image signal S _R is digitally converted to the right digital image signal S _R ′, and the analog / digital converter 114 uses the left image signal (D) as shown in FIG. S _L ) is digitally converted to the left digital video signal S _L ′.

Then, the two converted digital signals S _R ′ and S _L ′ are alternately selected by the selector 115 at intervals of fs / 6, so that the stereoscopic digital image signals S _{R +} as shown in FIG. _L ') is synthesized.

Here, fs is a frequency required for sampling image data corresponding to each pixel of the liquid crystal panel 101, that is, red (R), green (G), and blue (B), and the pixel sampling frequency fs is It is expressed as an expression.

T _H : horizontal scanning period, Ts: horizontal retrace period, 0.95: effective scanning rate N: number of pixels of the liquid crystal panel.

The pixel sampling frequency fs is output to the fs / 3 divider clock divided by three by the divider 111, and this signal is returned to the fs / 6 divider clock divided by two by the divider 112. Is output.

The fs / 3 divided clock of the third divider 111 is input to the clock stage CLK of the analog / digital converter 113 and 114 to serve as a synchronous clock. The fs / 6 divided clock is input to the clock stage CLK of the selector 115 to serve as a synchronous clock.

On the other hand, the granular digital image signal S _{R + L} ′ alternately selected by the selector 115 is applied to the digital / analog converter 116 synchronized with the fs / 6 division clock of the three divider 111. As shown in (C-1) of FIG. 10, the stereoscopic image signal S _{R + L} is converted into a stereoscopic image signal S _{R + L} , and the switching SW1 is connected to ⓐ under the control of the controller 103. It is input to the liquid crystal panel driver circuit 3 through the switching unit 117.

At this time, the reason for inputting the pixel sampling frequency fs into three clock input terminals of the digital / analog converter 116 and the analog / digital converter 113 and 114 is to divide red, green, and blue of the liquid crystal panel. This is because the array forms one pixel Pn.

The selector 115 selects either end of ⓒ (or ⓓ) from the positive level (or negative level) of the clock inputted to the clock input terminal CLK of the integrated circuit device, and selects one end of the clock at the negative level (or positive level) of the clock. Since either end of ⓓ (or ⓒ) is selected, the clock that divides the pixel sampling frequency (fs) into three is divided again by two to alternately select the right image information and the left image information for each adjacent pixel Pn. It is input to the clock input terminal CLK of the selector 115.

The stereoscopic image signal SR + L of the stereoscopic image digital processing unit 110 is converted into a suitable electrical image signal by the liquid crystal panel driver 102 and supplied to the liquid crystal panel 101 to supply liquid crystals of FIGS. 4) to play the physical image.

Accordingly, the light emitted from the lamp 100 which is the light source passes through the color filter 101-7 as the silier optical image information, and becomes colored, reaches the translucent plate 101-9, and is scattered by our eyes. This constitutes a detectable image.

R ₁ , L ₂ , R ₃ , L ₄ ,... Of stereoscopic-stereoscopic image information (S _{R + L} ) formed in this way. R _N- takes an independent light path in the left direction E ₁ and the right direction E _r through the lenticular lens 101-10 to reach the viewer's eye and the retina of the viewer's left and right eyes. By forming the same image having different wide angles, the transverse parallax effect and the integrated three-dimensional effect are recognized in the optic nerve center of the observer.

11A to 11E illustrate the stereoscopic image signal S _{R + L} (A) of FIG. 11 and the liquid crystal panel, in which the right image signal and the left image signal are alternately reconstructed adjacently at equal intervals. Red, green, and blue pixel arrays and pixels P _n (Fig. 11 (b)), pixel sampling frequency fs (Fig. 11 (c)), and the clock CLK of each integrated circuit device (Fig. 11). Waveforms comparing (d) and (e) of FIG. Are shown.

On the other hand, according to another configuration of the stereoscopic image display liquid crystal display device of the present invention, the liquid crystal panel driving unit 102 is the rear end of the composite image signal of the general CRT TV in FIG. 7, and the stereoscopic image digital processing unit 110 is provided in front.

In FIG. 8, the liquid crystal panel 2 of FIG. 2 composed of the remaining portions other than the lenticular lens 101-10 is called a cathode ray tube, and the arrangement of the color filter 12 of FIG. If the lenticular lenses (101-10) of FIGS. 8 and 9 are installed in front of the CRT as shown in FIG. 9, a general CRT TV can shoot two cameras from right to left at a certain interval to produce a stereoscopic image effect. 3D video can be played by receiving the right video signal and the left video signal.

That is, only the TV using the CRT as described above can be used to view the stereoscopic image by using the stereoscopic image processing unit only one of the transmission and reception.

As described above, the present invention can enjoy stereoscopic images if each stereoscopic image information is divided into right and left sides, and replaces the cost of two projectors with one TV for the reproduction of stereoscopic images. It is possible to use a digital device that is cheaper than that, the cost is reduced, and the portable is possible to watch a stereoscopic image anywhere.

Claims (4)

The light source means, the first division means for dividing the pixel sampling frequency fs of the liquid crystal panel by three, and the second division means for dividing the output signal of the first division means, and the right side according to the division clock of the first division means. According to the first and second signal conversion means for digitally changing the image signal S _R and the left image signal S _L , respectively, S ( _R ) (S | _L ') and the division clock of the second division means. Alternately selecting the right digital video signal _SR ′ and the left digital video signal S _L ′ output from the first and second signal converting means alternately to synthesize a stereoscopic digital video signal S _{R + L} ′. A third signal change for analog-converting the output signal S _{R + L} 'of the signal selection means into a stereoscopic image signal S _{R + L} according to the signal selection means and the output signal of the first division means. Means and a liquid crystal panel for driving the liquid crystal panel by converting the signal output from the third signal converting means into an electric video signal. Means, a liquid crystal panel for displaying a three-dimensional image by converting the output signal of the liquid crystal panel driving means into an optical image signal according to the light of the light source means, a power supply means for supplying power from the outside to each part, and the whole system And a control means for controlling the three-dimensional image display device. The stereoscopic image display device of claim 1, wherein the liquid crystal panel is configured by adding a lenticular lens frame to display a wide angle of a right image portion and a left image portion differently. The apparatus of claim 1, further comprising switching means for selectively outputting the stereoscopic image signal S _{R + L} and the composite image signal CS output from the third signal conversion means by a control signal of the control means. Stereoscopic display device characterized in that. The stereoscopic image display device of claim 2, wherein the lenticular lens forms a right wide angle and a left wide angle by forming one curved surface per two R, G, and B arrays of the liquid crystal panel.