JPH07322305A - Stereoscopic picture display panel and stereoscopic picture display device - Google Patents

Abstract

PURPOSE:To provide a stereoscopic picture display panel for eliminating a situation that an observer views a non-picture part due to the black matrix area of a display panel. CONSTITUTION:This panel is composed of a liquid crystal display panel provided with a picture element string for a left eye for which picture elements L for the left eye are arranged with fixed intervals in a screen vertical direction and the picture element string for a right eye for which the picture elements R for the right eye are arranged with the fixed intervals in the screen vertical direction for which the picture element string for the left eye and the picture element string for the right eye are arranged alternately and adjacently in a screen horizontal direction, the picture element string for the left eye and the picture element string for the right eye are mutually shifted in the screen vertical direction and the formation area of the driving means of the respective picture elements is secured and a lenticular plate for separating light from the picture elements L for the left eye and the light from the picture elements R for the right eye and respectively making the light incident on the left eye and the right eye.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display panel and a stereoscopic image display device capable of observing a stereoscopic image without using special glasses.

[0002]

2. Description of the Related Art Conventionally, as a method of displaying a stereoscopic image without using special glasses, a lenticular method, a parallax barrier method, and a method of slitting a light source have been proposed.

FIG. 9 is a schematic diagram showing the principle of stereoscopic image display by the parallax barrier method. The image observed by the observer is formed on the liquid crystal display panel 30. In order to enable stereoscopic viewing, the liquid crystal display panel 30 has a left-eye picture element L on which a left-eye picture is displayed and a right-eye picture element R on which a right-eye picture is displayed. Has been done. The positional relationship between the left-eye picture element L and the right-eye picture element R will be described later.

The image for the left eye and the image for the right eye can be obtained, for example, by simultaneously shooting with two cameras for the left eye and the right eye. Both images thus obtained include parallax information necessary for a human to perceive stereoscopically by binocular parallax.

A parallax barrier 31 is arranged in front of the liquid crystal display panel 30. Parallax barrier 31
Openings 31a ... Are formed in a vertical stripe pattern. The intervals of the openings 31a ... Are set corresponding to the arrangement of the left-eye picture element L and the right-eye picture element R. The parallax barrier 31 separates the left-eye image and the right-eye image into left and right, and the separated image is the left eye 2 of the observer.
Light enters the L and the right eye 2R respectively.

FIG. 10 is a schematic diagram showing the principle of stereoscopic image display by a method of slitting a light source. In the system shown in FIG. 10, a slit plate 33 is arranged in front of the light source 32 to emit light in a vertical stripe shape, and the stripe light is transmitted through each picture element of the liquid crystal display panel 30. It is a composition. The light source itself may be made to emit light in a vertical stripe shape. The method of slitting this light source also has the same effect as the parallax barrier method described above, and the left-eye image and the right-eye image are separated into the left and right, and the left eye 2L and the right eye 2R of the observer are obtained. The lights enter each.

FIG. 11 is a schematic diagram showing the principle of a stereoscopic image display device using the lenticular system. Lenticular plate 1 in which left-eye picture elements L and right-eye picture elements R are alternately arranged in the horizontal direction, and a large number of stripe-shaped lenticular lenses are arranged on the front surface thereof at intervals substantially corresponding to the pitch of two picture elements. Is arranged. In this case, the light emitted from each picture element enters the left and right eyes 2L, 2R of the observer located in front of the lenticular plate 1 by the lens refracting action of the lenticular plate 1, as shown in FIG. That is, the light emitted from the left-eye picture element L enters only the left-eye 2L and the right-eye picture element R
The light emitted from the light enters only the right eye 2R.

Conventionally, in order to alternately arrange the left-eye picture elements L and the right-eye picture elements R in the horizontal direction using a single liquid crystal panel, the left-eye picture element for the left-eye picture element in the liquid crystal panel is to be arranged. It is necessary to arrange the picture elements L and the picture elements R for the right eye as shown in FIG.

However, in the pixel array as shown in FIG. 12, a gate line for driving liquid crystal, a TFT (thin film transistor), etc. are provided between the left-eye pixel L and the right-eye pixel R. There is an existing region, that is, a black matrix region in which no picture element is formed. Therefore, when the light from the left-eye picture element L and the light from the right-eye picture element R are separated by a lenticular lens or the like, a region where the light from the left-eye picture element L is condensed and a right-eye picture A region corresponding to the black matrix exists between the region where the light from the element R is condensed, and when the left and right eyes of the observer are located in this region, no image information enters the left and right eyes. , The problem occurs that the observer sees a black screen.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art. Even when the head of an observer moves, the left and right eye image information of the observer does not enter at all. An object of the present invention is to provide a stereoscopic image display panel and a stereoscopic image display device that eliminate or reduce the situation where an observer sees a black screen.

[0011]

A stereoscopic image display panel according to the present invention includes a left-eye picture element array in which left-eye picture elements are arranged at regular intervals in the screen vertical direction, and a right-eye picture element in the screen vertical direction. And has a right-eye pixel array arranged at regular intervals, and the left-eye pixel array and the right-eye pixel array are alternately arranged in the horizontal direction of the screen, and the left-eye array is arranged. An image display panel in which the pixel array and the right-eye pixel array are mutually displaced in the vertical direction of the screen to secure the formation area of the driving means of each pixel, and the light from the left-eye pixel And image separation means for separating the light from the right-eye picture element and entering the light into the left eye and the right eye, respectively.

The term "proximity" means that the left-eye picture element sequence and the right-eye picture element sequence are in contact with each other, and also includes a case where they are slightly overlapped and a case where they are slightly separated. Further, in the stereoscopic image display panel of the present invention, the odd-numbered picture element rows are formed by an array of only one of the left-eye picture elements or the right-eye picture elements, and the even-numbered picture element rows are the left-eye picture elements. Alternatively, it is formed by arranging only the other of the right-eye picture elements, and the position of the left-eye picture element and the position of the right-eye picture element are displaced in the horizontal direction by a distance of 1/2 of the horizontal direction picture element pitch An image display panel, and image separation means for separating the light from the left-eye picture element and the light from the right-eye picture element into the left eye and the right eye, respectively. .

Further, the stereoscopic image display panel is characterized in that the image display panel is a liquid crystal panel. Also,
The stereoscopic image display panel of the present invention is characterized in that the image separating means is a lenticular plate.

The stereoscopic image display panel of the present invention is characterized in that the image separating means is a parallax barrier. Further, the stereoscopic image display panel of the present invention is characterized in that the image separating means is a light source that emits stripe-shaped light.

In the stereoscopic image display device of the present invention, the left-eye picture element row in which the left-eye picture elements are arranged at regular intervals in the vertical direction of the screen and the right-eye picture element at constant intervals in the vertical direction of the screen. Arranged with a right-eye picture element row, the left-eye picture element row and the right-eye picture element row are arranged alternately close to each other in the screen horizontal direction, and the left-eye picture element row An image display panel in which the right-eye pixel array is mutually shifted in the vertical direction of the screen so as to secure a formation area of a drive unit for each pixel, light from the left-eye pixel and the right eye. Image separating means for separating the light from the picture element into the left eye and the right eye respectively, row driving means for sequentially switching the rows to be scanned by the image display panel every horizontal scanning period, and the left eye 1 video signal for right eye and video signal for right eye
It is characterized in that it is provided with a column driving means for alternately switching to every horizontal scanning period and supplying to the image display panel.

In the stereoscopic image display device of the present invention, the odd-numbered picture element rows are formed by arranging only one of the left-eye picture elements or the right-eye picture elements, and the even-numbered picture element rows are the left-eye picture elements. Formed by only the other of the picture element for the right eye or the picture element for the right eye, and the position of the picture element for the left eye and the position of the picture element for the right eye are ½ of the horizontal direction picture element pitch in the horizontal direction. An image display panel that is displaced by a distance, an image separation unit that separates the light from the left-eye picture element and the light from the right-eye picture element into the left eye and the right eye, respectively, and the image display. Row driving means for sequentially switching the rows to be scanned on the panel for each horizontal scanning period and the left eye video signal and the right eye video signal are alternately switched for each horizontal scanning period and supplied to the video display panel. Column driving means.

In the stereoscopic image display device of the present invention, the left-eye picture element row in which the left-eye picture elements are arranged at regular intervals in the vertical direction of the screen and the right-eye picture element at regular intervals in the vertical direction of the screen. Arranged with a right-eye picture element row, the left-eye picture element row and the right-eye picture element row are arranged alternately close to each other in the screen horizontal direction, and the left-eye picture element row An image display panel in which the right-eye pixel array is mutually shifted in the vertical direction of the screen so as to secure a formation area of a drive unit for each pixel, light from the left-eye pixel and the right eye. Image separating means for separating the light from the picture element to enter into the left eye and the right eye respectively, and the lines to be scanned on the image display panel for each half period of one horizontal scanning period of the original image signal. Row driving means for sequentially switching, and a horizontal scanning of the original video signal for the left-eye video signal and the right-eye video signal, respectively. Column driving means for compressing each of the compressed video signals and alternately switching each compressed video signal for every 1/2 horizontal scanning period of the original video signal to supply the video display panel. It is characterized by

Further, in the stereoscopic image display device of the present invention, the odd-numbered picture element rows are formed by the arrangement of only one of the left-eye picture elements or the right-eye picture elements, and the even-numbered picture element rows are the left-eye picture elements. Formed by only the other of the picture element for the right eye or the picture element for the right eye, and the position of the picture element for the left eye and the position of the picture element for the right eye are ½ of the horizontal direction picture element pitch in the horizontal direction. An image display panel that is displaced by a distance, an image separation unit that separates the light from the left-eye picture element and the light from the right-eye picture element into the left eye and the right eye, respectively, and the image display. Row driving means for sequentially switching the rows to be scanned on the panel at intervals of 1/2 of one horizontal scanning period of the original video signal, and the left-eye video signal and the right-eye video signal are respectively set to 1 of the original video signal. Compressed in half the horizontal scanning period, and compressing each compressed video signal of the original video signal. Characterized by comprising a column drive means for supplying the image display panel alternately switched every half period of the horizontal scanning period.

The "left-eye video signal" and "right-eye video signal" include both analog video signals and digital video data.

[0020]

In the stereoscopic image display panel having the above-described configuration, the left-eye pixel array and the right-eye pixel array are close to each other in the horizontal direction of the screen, so that there is no black matrix area between the pixel arrays. Will not exist or will be reduced. Therefore, even if the position of the observer's head deviates slightly in the left-right direction, the observer does not see the non-image portion at all, or sees it slightly. Further, since the left and right picture element columns are displaced from each other in the vertical direction of the screen and the formation area of the driving means for each picture element is secured, each picture element can be driven without any problem.

Further, in the stereoscopic image display panel having the above-mentioned other structure, the picture element for the left eye is vertically displaced from the black matrix area formed between the adjacent picture elements for the right eye. Are formed, the number of row regions in which picture elements are not formed is reduced in the horizontal direction of the screen. Therefore,
Even if the position of the observer's head deviates slightly in the left-right direction, the observer does not see the non-image portion at all or barely sees it. Moreover, since the positions of the left and right picture elements are displaced by a distance of 1/2 of the picture element pitch in the horizontal direction, the row region where the picture elements are not formed is the smallest. Such a display panel is suitable for any of the following lenticular plates, parallax barriers, and light sources that emit striped light as image separating means, and has high versatility.

When a lenticular plate is used as the image separating means, the influence of the black matrix area of the image display panel appears strongly, so that the left-eye pixel array and the right-eye pixel array slightly overlap each other. Good.

On the other hand, when a parallax barrier or a light source that emits stripe-shaped light is used as the image separating means, it is highly necessary to eliminate the influence of crosstalk between the left and right images, and therefore the left-eye pixel array. The right-eye pixel array may be slightly separated from each other.

Further, according to the stereoscopic image display device having the above-described configuration, the left-eye picture element and the right-eye picture element are arranged on the video display panel as described above to form the above-mentioned stereoscopic video display panel. You can

Further, as described above, in the stereoscopic image display device using the signal obtained by compressing the left-eye image signal and the right-eye image signal in the half of one horizontal scanning period of the original image signal, Since both the right-eye video signal and the left-eye video signal can be used within the horizontal scanning period, it is not necessary to discard the right-eye video signal and the left-eye video signal for each horizontal scanning period. The video signal of can be used efficiently, and the vertical resolution is improved.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view schematically showing a pixel array of a video display panel used in the stereoscopic video display device of the first embodiment. The square frame in the figure corresponds to one picture element.

In the pixel array shown in FIG. 1, odd-numbered columns N1, N3, ... Are columns in which the right-eye pixels R are arranged at regular intervals in the vertical direction of the screen. Hereinafter, the odd-numbered column will be referred to as a right-eye pixel array. The even-numbered columns N2, N4, ... Are columns in which the left-eye picture elements L are arranged at regular intervals in the vertical direction of the screen. Hereinafter, the even-numbered column will be referred to as a left-eye pixel array. The right-eye pixel array and the left-eye pixel array are alternately in contact with each other in the horizontal direction of the screen.

The right-eye picture element sequence and the left-eye picture element sequence are
They are arranged offset from each other in the vertical direction of the screen. That is, when the pixel array is viewed in the row direction, odd-numbered rows M1, M3, ...
.. are composed of only the right-eye picture element R, and the even rows M2, M4, ... Are composed only of the left-eye picture element L.

Due to the displacement of the picture element rows in the vertical direction of the screen, the black matrix area BM1 is formed between the picture elements R for the right eye which are adjacent in the horizontal direction, and the black matrix area BM1 is formed in the horizontal direction. A black matrix region BM2 is formed between the adjacent left-eye picture elements L.
A driving unit for each picture element can be formed in the black matrix regions BM1 and BM2.

Further, in this embodiment, the left-eye picture element L and the right-eye picture element R are 1 / of the picture element pitch Ph in the horizontal direction.
It is formed with a gap of 2. Since the horizontal width of each picture element is equal to 1/2 of the picture element pitch Ph, the picture element row for the left eye and the picture element row for the right eye are in contact with each other. Further, the left-eye picture element L and the right-eye picture element R are formed so as to be displaced from each other by ½ of the picture element pitch Pv in the vertical direction.

As the above-mentioned image display panel, for example,
A liquid crystal display panel is used. And in this embodiment,
The liquid crystal display panel has 240 scanning lines. That is, 120 scanning lines in the odd-numbered rows in which the right-eye picture element R is formed,
There are 120 even-numbered scanning lines on which the left-eye picture element L is formed.

FIG. 2 is a block diagram of the stereoscopic image display device of the first embodiment, in which the right eye image signal and the left eye image signal are arranged so as to have the picture element array shown in FIG. 2 shows a circuit configuration for inputting to the column driving unit of the liquid crystal display panel.

In FIG. 2, 3 is a Y / C separation circuit for separating a luminance signal and a color signal from the video signal for the right eye, and 4 is a separation circuit for the luminance signal and the color signal from the video signal for the left eye. Y / C
It is a separation circuit.

Reference numeral 5 is a timing signal generating circuit which outputs a 1H inversion signal or the like which is inverted every horizontal scanning period (1H) in synchronization with the horizontal synchronizing signal of the video signal for the left eye. 1
The H inversion signal is a signal in which "1" and "0" are inverted every horizontal scanning period.

Reference numeral 6 denotes a case where the right eye and left eye luminance signals and color signals are input from the Y / C separation circuits 3 and 4, respectively, and a right eye luminance signal and a color signal are output, and a case where the left eye is used. And an analog switch for switching between outputting a luminance signal and a chrominance signal for each horizontal scanning period according to the 1H inversion signal.
Specifically, it has two sets of switch units, and the two signal input units 6a and 6b that form the first set of switch units have the brightness of the video signal for the right eye and the video signal for the left eye. The respective signals are input, and any luminance signal is output from the signal output terminal 6c. Further, the color signals of the right-eye video signal and the left-eye video signal are respectively input to the two signal input sections 6d and 6e that form the second set of switch sections, and either of the color signals is a signal. It is output from the output terminal 6f. The switch unit of the first set and the switch unit of the second set are switched in synchronization with each other. This switching is performed by the 1 from the timing signal generating circuit 5.
This is performed every horizontal scanning period based on the H inversion signal.

Reference numeral 7 is for inputting the luminance signal and the color signal output from the analog switch 6, and R (red), G (green),
A demodulation circuit for outputting B (blue) three primary color signals, 8 is the above-mentioned 3
The voltage conversion circuit converts the primary color signal into a voltage for driving the liquid crystal and outputs the voltage.

Reference numeral 9 is a liquid crystal display panel, 10 is a column drive circuit for supplying a video signal to the liquid crystal panel 9, and 11 is a row drive circuit for designating a row driven by the liquid crystal panel 9.
In addition, the demodulation circuit 7, the voltage conversion circuit 8, the column drive circuit 1
0, the row drive circuit 11 is the timing signal generation circuit 5
The operation timing is controlled by the timing signal from. Further, the liquid crystal panel 9 is naturally arranged with electrodes corresponding to the picture elements shown in FIG.

Next, the operation of the circuit shown in FIG.
This will be described with reference to the signal waveform diagram of FIG. First, the video signal for the right eye shown in FIG. 3A is separated into a luminance signal and a color signal by the Y / C separation circuit 3, and the luminance signal is supplied to the signal input terminal 6a of the analog switch 6, and the color signal is It is input to each of the signal input terminals 6d. The video signal for the left eye shown in FIG. 3B is also separated into a luminance signal and a color signal by the Y / C separation circuit 4, and the luminance signal is sent to the signal input terminal 6b of the analog switch 6 and the color signal is sent to the signal. It is input to each of the input terminals 6e.

The analog switch 6 has a luminance signal and a color signal for the right eye, which are input from the Y / C separation circuits 3 and 4.
And a first state in which a right eye luminance signal and a color signal are selected and output from a left eye luminance signal and a color signal, and a left eye luminance signal and a color signal are selected and output. The second state is switched by the 1H inversion signal from the timing signal generation circuit 5. That is, the analog switch 6 switches between the first state and the second state every horizontal scanning period.

Specifically, when the signal input to the analog switch 6 is a signal corresponding to an odd-numbered line of the liquid crystal display panel described later, the 1H inversion signal becomes "1", and the analog switch 6 inputs the signal. The terminals 6a and 6d are selected (first state), and the luminance signal and the color signal for the right eye are output. When the signal input to the analog switch 6 is a signal corresponding to the even-numbered line of the liquid crystal display panel, 1
The H inversion signal becomes "0", the analog switch 6 selects the signal input terminals 6b and 6e (second state), and outputs the left eye luminance signal and color signal. That is, the analog switch 6 outputs a composite video signal as shown in FIG. In FIG. 3, for convenience, the luminance signal and the chrominance signal are not separated and are shown as left-eye video signals L1, L2 ..., Right-eye video signals R1, R2. is there.

The signal output from the analog switch 6 is converted by the demodulation circuit 7 into three primary color signals of R, G, B, and further converted into a desired voltage by the voltage conversion circuit 8, and the column drive circuit 10 is converted. To enter.

On the other hand, in the row drive circuit 11, in synchronization with the 1H inversion signal from the timing signal generation circuit 5, the lines to be scanned are the 1st row, the 2nd row, the 3rd row, ... It switches in order.

The column driving circuit 10 also synchronizes with the 1H inversion signal, and the video signal for the right eye based on R1, R3 ... In FIG. 3 (c) and L2, L4 in FIG. 3 (c). The video signal for the left eye based on ... is alternately output to the liquid crystal display panel 9 for each horizontal scanning period.

Therefore, when the row driving circuit 11 specifies the odd-numbered lines, the column driving circuit 10 outputs the video signal for the right eye to the liquid crystal display panel 9, and the row driving circuit 11 outputs the even-numbered rows. When designating a line, the column drive circuit 10 outputs a video signal for the left eye to the liquid crystal display panel 9.

As described above, if the above circuit is operated,
The right-eye picture element formed on the liquid crystal display panel 9 is displayed according to the right-eye video signal, and the left-eye picture element is displayed according to the left-eye video signal. As a result, a picture element array as shown in FIG. 1 is formed.

FIG. 4 is a portion showing the picture element arrangement on the lenticular screen when the picture elements are projected on the lenticular screen by using the liquid crystal panel of the picture element arrangement shown in FIGS. 1 and 2 above in a liquid crystal projector. It is a perspective view.

In FIG. 4, 12 is a diffusion plate on which a picture element image of a picture element of a liquid crystal display panel is formed, and 13 is a light from the picture element image, which is divided into light for the right eye and light for the left eye. It is a lenticular plate that does.

In one lenticular lens of the lenticular plate 13, a right eye picture element image row R'in which a right eye picture element image R'is vertically aligned, and a left eye picture element image R '. An image is formed so that one set of the left-eye picture element images in which the element images L ′ are arranged in a line in the vertical direction are arranged. The left-eye picture element image sequence and the right-eye picture element image sequence are displaced from each other by 1/2 of the picture element image pitch Ph ′ in the horizontal direction, and in the vertical direction, the picture element image pitch Pv. The image is deviated by 1/2. Therefore, the diffuser plate 12 has no row region in the horizontal direction in which no pixel image is formed, and either the right-eye pixel image R ′ or the left-eye pixel image L ′ is always formed. There is a row area being imaged. Further, there is no row region in which both the right-eye pixel image R ′ and the left-eye pixel image L ′ are formed.

FIG. 5 is a schematic diagram showing a state in which an observer sees the picture element image formed on the diffusion plate 12 through the lenticular plate 13. As is clear from the above description, the diffusion plate 1
In the picture element image formed on No. 2, when viewed in the horizontal direction, there is no row region where no picture element image is formed (discontinuity of the picture element image). Therefore, the picture element image R ' ,
The light from L ′ is separated by the lenticular plate 13, and at the proper viewing position, the region R ″ where the light from the right-eye pixel image R ′ is condensed and the left-eye pixel image L ′ are collected. The region L ″ where the light is condensed is continuous without interruption in the horizontal direction. Therefore, even if the observer's head moves horizontally,
The position of the observer's eyes does not cross the area where the light from the pixel images R ′ and L ′ does not enter at all, and the image does not disappear.

In the case of the above-mentioned first embodiment, as can be seen from the waveform diagram of FIG. 3, the right eye video signal and the left eye video signal are alternately sampled every horizontal scanning period to display a liquid crystal display. It is input to the panel and the rest of the video signal is not used at all. Specifically, the video signals R1, R3, ... For the right eye and the video signals L2, L4, ... For the left eye are input to the liquid crystal panel, and the remaining video signals R2 for the right eye, R4 ... and the video signals L1, L3 ... for the left eye are not used at all.
For this reason, there is a problem that the resolution in the vertical direction is deteriorated to 1/2.

FIG. 6 is a circuit block diagram of a stereoscopic image display device of the second embodiment which solves the above problems, and FIG. 7 is a waveform diagram for explaining the operation of this circuit. In FIG. 6, 14, 15
Is a demodulation circuit, 16 and 17 are A / D conversion circuits, 18 and 19
Is a double speed conversion circuit, 20 is a multiplexer, 21 is a D / A
A conversion circuit 22 is a timing signal generation circuit which outputs a 1 / 2H inversion signal or the like in which "1" and "0" are inverted every 1/2 horizontal scanning period based on the video signal for the left eye, and 23 is A voltage conversion circuit, 24 a liquid crystal display panel, 25 a column drive circuit,
Reference numeral 26 is a row drive circuit. The liquid crystal display panel 24 is
The number of vertical scanning lines is 480, which is twice the number of scanning lines of the liquid crystal display panel 9 of the first embodiment. The demodulation circuits 14 and 15, the A / D conversion circuits 16 and 17, the double speed conversion circuits 18 and 19, the multiplexer 20, the D / A conversion circuit 21, the voltage conversion circuit 23, the column drive circuit 25, and the row drive circuit 26 are The operation timing is controlled in synchronization with the timing signal from the timing signal generation circuit 22.

The demodulation circuit 14 inputs the video signal for the right eye, and generates and outputs the three primary color signals of R, G, B. The demodulation circuit 15 receives the left-eye video signal, generates R, G, and B primary color signals and outputs the signals.

The A / D conversion circuit 16 converts the R, G, and B primary color signals from the demodulation circuit 14 into digital data and outputs the digital data. The A / D conversion circuit 17 converts the R, G, and B primary color signals from the demodulation circuit 15 into digital data and outputs the digital data.

The double speed conversion circuit 18 is the A / D conversion circuit 1
The digital data from 6 is repeatedly output at a double speed for each horizontal scanning period in the original signal. The double speed conversion circuit 19 repeatedly outputs the digital data from the A / D conversion circuit 17 at a double speed for each horizontal scanning period of the original signal.

The multiplexer 20 has three sets of switch parts. The R signal digital data of the right eye video signal and the R image data of the left eye are input to the two signal input terminals 20a and 20b that form the first set of switch units. Is output from the signal output terminal 20c. In addition, the two signal input terminals 20d and 20e forming the second set of switch units are connected to the right-eye video signal,
The G digital data of the video signal for the left eye is input,
Any G digital data is output from the signal output terminal 20f. Further, B signal digital data of the right-eye video signal and the left-eye video signal are respectively input to the two signal input terminals 20g and 20h forming the third set of switch units, and one of the B signals Digital data is signal output terminal 20i
Is output from. The first set of switch parts, the second set of switch parts, and the third set of switch parts are switched in synchronization. This switching is performed based on the 1 / 2H inversion signal from the timing signal generating circuit 22.

The D / A conversion circuit 21 converts the digital data of the three primary colors of R, G and B selected by the multiplexer 20 into an analog signal and outputs it. The Y / C separated right eye video signal and left eye video signal are demodulated by the demodulation circuit 1.
4 and 15 convert the color signals of the three primary colors of R, G, and B, respectively. This color signal is converted into 8-bit digital data by A / D conversion circuits 16 and 17, respectively. Figure 7
(A) and (b) are respective waveform diagrams at this time.

Next, the digital data is repeatedly output by the double speed conversion circuits 18 and 19 at a double speed for each horizontal scanning period of the original signal. That is, the double speed conversion circuits 18 and 19 compress the input signal to ½ hour for each horizontal scanning period of the original signal and repeatedly output the compressed signal twice. Figure 7
As shown in (c) and (d).

This double-speed converted digital signal is 1 /
It is selectively output by the multiplexer 20 driven by the 2H inversion signal. For example, in the first 1/2 period of one horizontal scanning period in the original signal, 1 /
If the 2H inversion signal is "0", and the 1 / 2H inversion signal is "1" in the latter half period, the multiplexer 20 determines that the 1 / 2H inversion signal is "0". Outputs R, G, B digital data for the right eye,
When the 2H inversion signal is "1", R, G, B digital data for the left eye is output. That is, as shown in the waveform diagram of FIG. 7E, the multiplexer 20 controls the R for the right eye during the half of the first half of one horizontal scanning period in the original signal.
G, B digital data is output, and R, G, B digital data for the left eye is output in the latter half period.

The R, G, B digital data output from the multiplexer 20 is converted into an analog signal by the D / A conversion circuit 21, and converted into a voltage for driving the liquid crystal by the voltage conversion circuit 23. Column drive circuit 2
5 is supplied.

The row drive circuit 26 synchronizes with the 1 / 2H inversion signal from the timing signal generation circuit 22 to drive the line driven by the liquid crystal display panel 24 every 1/2 period of one horizontal scanning period in the original signal. Switch in order. That is, the video signal output from the column driving circuit 25 to the liquid crystal display panel 24 is 1 in the first half of one horizontal scanning period in the original signal in which the row driving circuit 26 selects the odd-numbered line on the liquid crystal display panel 24. In the period of / 2, it is a video signal for the right eye, and in the half of the latter half of one horizontal scanning period in the original signal, it is a video signal for the left eye. That is, the picture element array as shown in FIG. 1 is constructed.

In the second embodiment as described above, as can be seen from the waveform diagram of FIG. 7, the right eye signal and the left eye signal in one horizontal scanning period are compressed to ½ hour to obtain 1 in the original signal. A video signal for the right eye which is compressed for 1/2 hour in the first half of the horizontal scanning period is used, and a video signal for the left eye is compressed for 1/2 hour in the second half of the second half. Therefore, all video signals are used for both the right-eye video signal and the left-eye video signal. That is, the column drive circuit 25
To the right eye, all the video signals R1, R2, R3, ... For the right eye are input in a compressed state for 1/2 hour, and all the video signals L1, L2, L3 ,. It is input in a compressed state for / 2 hours and is output to the liquid crystal display panel 24. Therefore, there is no video signal that is not used, and the resolution in the vertical direction of the screen can be increased as compared with the configuration of the first embodiment.

Although the first and second embodiments are projection type display devices using a projector, the present invention is also applicable to a direct view type display device for directly observing a liquid crystal display panel. is there.

In the above embodiments, the lenticular plate is used as the image separating means, but a parallax barrier may be used instead of this lenticular plate. FIG. 8 is a plan view of a stereoscopic image display panel using a parallax barrier, in which a part of the parallax barrier is cut away. The parallax barrier 27 is arranged with the vertical stripe-shaped openings 27a ... Corresponding to the pixel arrangement of the liquid crystal display panel. The principle of displaying a stereoscopic image when the parallax barrier 27 is used is the same as the principle shown in FIG. Further, when the parallax barrier 27 is used, it is highly necessary to eliminate the influence of the crosstalk between the left and right images, and therefore, as shown in FIG. The rows are spaced slightly apart.

A light source that emits light in a stripe shape may be used as the image separating means. Even when this slit light source is used, the slit portion is made to correspond to the pixel array of the liquid crystal display panel. The principle of stereoscopic image display in this case is the same as the principle shown in FIG.

[0065]

According to the present invention, an area where a stereoscopic image cannot be seen is reduced due to the black matrix portion existing in the display panel, and the observer can enjoy the stereoscopic image well even if the head is moved. It is possible to provide a stereoscopic image display panel and a stereoscopic image display device capable of performing the above.

Further, according to the present invention, it is possible to provide a stereoscopic image display device having the above-mentioned effect without lowering the vertical resolution.

[Brief description of drawings]

FIG. 1 is a diagram showing a pixel array of a video display panel used in a stereoscopic video display device of the present invention.

FIG. 2 is a block diagram of a stereoscopic image display device according to a first embodiment of the present invention.

FIG. 3 is a waveform diagram of a video signal in the stereoscopic video display device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a state of a picture element image formed on a lenticular screen by the stereoscopic image display device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a path of light from a picture element image in the stereoscopic image display device according to the first embodiment of the present invention.

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

FIG. 7 is a waveform diagram of a video signal in the stereoscopic video display device according to the second embodiment of the present invention.

FIG. 8 is a view showing a stereoscopic image display panel of another embodiment of the present invention with a parallax barrier portion partially cut away.

FIG. 9 is a schematic diagram showing the principle of stereoscopic image display by a parallax barrier method.

FIG. 10 is a schematic diagram showing the principle of stereoscopic image display by a method of slitting a light source.

FIG. 11 is a schematic diagram showing the principle of stereoscopic image display by the lenticular method.

FIG. 12 is a diagram showing a pixel array of a display panel used in a conventional stereoscopic image display device.

[Explanation of sign]

 L Left-eye picture element R Right-eye picture element 5 Timing signal generation circuit 6 Analog switch 9 Liquid crystal display panel 10 Column drive circuit 11 Row drive circuit 12 Lenticular plate 18, 19 Double speed conversion circuit 20 Multiplexer 22 Timing signal generation circuit 24 Liquid crystal Display panel 25 column drive circuit 26 row drive circuit 27 Parallax barrier

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsuhiro Yamashita 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Naoki Matsushita 2-5 Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5 Sanyo Denki Co., Ltd. (72) Inventor Ken Masutani 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Denki Co., Ltd.

Claims (10)

[Claims] 1. A left-eye picture element array in which left-eye picture elements are arranged at regular intervals in the screen vertical direction, and a right-eye picture element array in which right-eye picture elements are arranged at constant intervals in the screen vertical direction. Having, the left-eye picture element row and the right-eye picture element row are arranged alternately close to each other in the screen horizontal direction, the left-eye picture element row and the right-eye picture element row An image display panel that is arranged so as to be mutually displaced in the vertical direction of the screen to secure a formation area for the drive means of each picture element,
A stereoscopic image display panel comprising: an image separation unit that separates light from the left-eye picture element and light from the right-eye picture element into the left eye and the right eye, respectively. 2. An odd-numbered picture element row is formed by an arrangement of only one of the left-eye picture element or the right-eye picture element, and an even-numbered picture element row is the left-eye picture element or the right-eye picture element. An image display panel which is formed by only the other arrangement, and in which the positions of the left-eye picture element and the right-eye picture element are displaced in the horizontal direction by a distance of 1/2 of the horizontal direction picture element pitch, A stereoscopic image display panel comprising: an image separation unit that separates light from the left-eye picture element and light from the right-eye picture element into the left eye and the right eye, respectively. 3. The stereoscopic video display panel according to claim 1, wherein the video display panel is a liquid crystal panel. 4. The stereoscopic image display panel according to claim 1, wherein the image separating means is a lenticular plate. 5. The stereoscopic image display panel according to claim 1, 2 or 3, wherein the image separating means is a parallax barrier. 6. The three-dimensional image display panel according to claim 1, wherein the image separation means is a light source that emits light in a stripe shape. 7. A left-eye picture element array in which left-eye picture elements are arranged at regular intervals in the screen vertical direction, and a right-eye picture element array in which right-eye picture elements are arranged at constant intervals in the screen vertical direction. Having, the left-eye picture element row and the right-eye picture element row are arranged alternately close to each other in the screen horizontal direction, the left-eye picture element row and the right-eye picture element row An image display panel that is arranged so as to be mutually displaced in the vertical direction of the screen to secure a formation area for the drive means of each picture element,
Image separation means for separating the light from the left-eye picture element and the light from the right-eye picture element into the left eye and the right eye, respectively, and one horizontal scan for a row to be scanned on the video display panel. A row driving unit that sequentially switches for each period, and a column driving unit that alternately switches the left-eye video signal and the right-eye video signal for each horizontal scanning period and supplies the video display panel. Characteristic stereoscopic image display device. 8. An odd-numbered picture element row is formed by an arrangement of only one of the left-eye picture element or the right-eye picture element, and an even-numbered picture element row is the left-eye picture element or the right-eye picture element. An image display panel which is formed by only the other arrangement, and in which the positions of the left-eye picture element and the right-eye picture element are displaced in the horizontal direction by a distance of 1/2 of the horizontal direction picture element pitch, Image separation means for separating the light from the left-eye picture element and the light from the right-eye picture element into the left eye and the right eye, respectively, and one horizontal scan for a row to be scanned on the video display panel. A row driving unit that sequentially switches for each period, and a column driving unit that alternately switches the left-eye video signal and the right-eye video signal for each horizontal scanning period and supplies the video display panel. Characteristic stereoscopic image display device. 9. A left-eye picture element array in which left-eye picture elements are arranged at regular intervals in the screen vertical direction, and a right-eye picture element array in which right-eye picture elements are arranged at constant intervals in the screen vertical direction. Having, the left-eye picture element row and the right-eye picture element row are arranged alternately close to each other in the screen horizontal direction, the left-eye picture element row and the right-eye picture element row An image display panel that is arranged so as to be mutually displaced in the vertical direction of the screen to secure a formation area for the drive means of each picture element,
Image separation means for separating the light from the left-eye picture element and the light from the right-eye picture element into the left eye and the right eye, respectively, and an original video signal for scanning rows of the video display panel. Row driving means for sequentially switching every 1/2 horizontal scanning period, the left-eye video signal and the right-eye video signal,
The original video signal is compressed in a half period of one horizontal scanning period, and each compressed video signal is alternately switched every half horizontal scanning period of the original video signal and supplied to the video display panel. And a column driving means for controlling the stereoscopic image display device. 10. An odd-numbered picture element row is formed by an arrangement of only one of the left-eye picture element or the right-eye picture element, and an even-numbered picture element row is the left-eye picture element or the right-eye picture element. And the position of the left-eye picture element and the position of the right-eye picture element are ½ of the horizontal picture element pitch in the horizontal direction.
An image display panel that is displaced by a distance, image separation means that separates the light from the left-eye pixel and the light from the right-eye pixel into the left and right eyes, respectively, and the image. A row driving unit that sequentially switches the rows to be scanned on the display panel at intervals of 1/2 of one horizontal scanning period of the original video signal, and a left-eye video signal and a right-eye video signal, respectively, of the original video signal. A column driving means for compressing in one half of one horizontal scanning period and alternately switching each compressed video signal for each half period of one horizontal scanning period of the original video signal and supplying the video display panel. A stereoscopic image display device comprising: