JP2002199416A - Stereoscopic image display method and stereoscopic image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic image display method and a stereoscopic image display device that can accurately attain multiple gradation display, even when employing a mixture of a time division two-eye stereoscopic image and a usual image and view the time division 2-eye stereoscopic image and the usual image at the same time. SOLUTION: The stereoscopic image display method and the stereoscopic image display device can carry out above tasks by having a stereoscopic display module, that sequentially displays a left eye multiple gradation image and a right-eye multiple gradation image of itself, in response to the combinations of sub fields SF1-SF10 resulting from dividing one image display period and controls opening/closing of a shutter of shutter eyeglasses synchronously with of the left-eye multiple gradation image and the right-eye multiple gradation image and having a normal display module that sets a sub field group, where gradation display of itself is completed within a period of the sub fields SF1-SF5 to display the left-eye multiple gradation image and a period of the sub fields SF6-SF10 to display the right-eye multiple gradation image and that displays the normal image, corresponding to the sub field groups.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display method and a three-dimensional image display device for displaying a multi-tone image by a subfield method, and more particularly to a three-dimensional image display device using shutter glasses to display a three-dimensional image. The present invention relates to a stereoscopic image display method and a stereoscopic image display device that constitute one display device using a module and a normal display module that displays a normal two-dimensional image.

[0002]

2. Description of the Related Art PDP (Plasma Display)
In a binary light emitting type display device such as Panel (Panel), a multi-tone image is displayed by a subfield method. In this subfield method, one field of a television is divided into a plurality of subfields in the time direction, and each of the divided subfields emits light corresponding to the bit weight of a binary-coded image signal. This is a display method for displaying a multi-tone image.

A stereoscopic image display method and a stereoscopic image display apparatus for displaying a stereoscopic image using shutter glasses on a PDP or the like in which a multi-tone image is displayed by the subfield method have been filed by the present applicant. "3D image display method and apparatus" (Japanese Patent Application No. 10-205093)
"3D image display method and apparatus" (Japanese Patent Application No. 10-2)
No. 82590).

A "stereoscopic image display method and apparatus" (Japanese Patent Application No. 10-205093) displays a stereoscopic image using a driving method with a continuous address-sustain period used in a DC PDP or the like. In addition, the “stereoscopic image display method and device” (Japanese Patent Application No. 10-282590)
A three-dimensional image is displayed by using an address-sustain separate driving method (ADS method), which is a driving method of an AC PDP or the like.

In recent years, with a demand for a wide field of view and a large screen of an image display device, a wide field of view and a large screen of a stereoscopic image display device have been desired. 2. Description of the Related Art Conventionally, when a stereoscopic image is formed in a wide-view, large-screen image display device, for example, the stereoscopic image is configured by a plurality of stereoscopic display modules for displaying a stereoscopic image.

[0006]

However, a stereoscopic display module is more expensive than a normal display module for displaying a normal two-dimensional image, and requires a video signal for two channels to display a stereoscopic image. Become. Therefore, when an image display device is constituted by three stereoscopic display modules, video signals for six channels are required, and a transmission / recording device for supplying the video signals is required. Therefore, if the image display device is constituted by only a plurality of stereoscopic display modules, there is an economical problem.

On the other hand, in consideration of economical problems, it is conceivable that the image display device is composed of a plurality of stereoscopic display modules and a normal display module, and displays a stereoscopic image only at the center of the screen that is visually important. . For example, when an image display device is configured with three display modules and a stereoscopic image is displayed only at the center of the screen, one stereoscopic display module and video signals for four channels are required.

However, when the normal display module and the stereoscopic display module are used in combination, there is a problem as shown in FIG. 4 due to shutter glasses. FIG. 4 is a diagram illustrating an example of a case where a normal display module and a stereoscopic display module are used in combination.

FIG. 4A shows a driving sequence of the PDP by the ADS method. In FIG. 4A, in order to display an image of 1024 gradations with 10 bits, the relative ratio of luminance in one field is 1, 2, 4, 8, and
It comprises ten subfields SF1 to SF10 of 16, 32, 64, 128, 256 and 512. That is, the normal display module is composed of 102 subfields SF1 to SF10 in FIG.
Display of four gradations is performed.

As shown in FIGS. 4B and 4C, the shutter glasses open the left (L) shutter in the first half of one field and open the right (R) shutter in the second half of one field. Is controlled as follows. That is, the user who views the normal display module through the shutter glasses observes the first half of one field (subfields SF1 to SF6) with the left eye as shown in FIGS. 4D and 4E. On the other hand, the right eye observes the latter half of one field (subfields SF7 to SF10). Therefore, there is a problem that multi-gradation display completed in one field cannot be viewed correctly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to accurately perform multi-tone display even when a time-division two-lens three-dimensional image and a normal image are mixed and used. It is an object of the present invention to provide a stereoscopic image display method and a stereoscopic image display device capable of simultaneously viewing a stereoscopic image and a normal image.

[0012]

In order to solve the above-mentioned problems, the present invention uses a mixture of a stereoscopic display module for displaying a time-division binocular stereoscopic image and a normal display module for displaying a normal image. In the stereoscopic image display method, one screen display period is divided into a plurality of subfields,
A sub-field period for displaying the left-eye multi-tone image while displaying the left-eye multi-tone image and the right-eye multi-tone image of the stereoscopic display module in accordance with the combination of the divided sub-fields. Setting a subfield group in which the gradation display of the normal display module is completed within the subfield period for displaying the multi-gradation image for the inside and the right eye, and displaying the normal image according to the subfield group And controlling the opening and closing of the shutter of the shutter glasses in accordance with the subfield period of the left-eye multitone image and the subfield period of the right-eye multitone image.

As described above, the gradation display of the normal display module is completed within the sub-field period for displaying the left-eye multi-tone image and the sub-field period for displaying the right-eye multi-tone image. By setting a subfield group and displaying a normal image according to the subfield group, even if a normal display module and a stereoscopic display module are used together, multi-tone display of a normal image is accurately performed. be able to. Therefore, even if the time-division binocular stereoscopic image and the normal image are simultaneously viewed through the shutter glasses, it is possible to view an accurate multi-tone display.

According to another aspect of the present invention, there is provided a stereoscopic image display apparatus which uses a mixture of a stereoscopic display module for displaying a time-division binocular stereoscopic image and a normal display module for displaying a normal image. The one-screen display period is divided into a plurality of sub-fields, and the left-eye multi-tone image and the right-eye multi-tone image of the stereoscopic display module are sequentially displayed according to the combination of the divided sub-fields. Module for controlling the opening and closing of the shutter of the shutter glasses in synchronization with the display of the multi-tone image for the right eye and the multi-tone image for the right eye, and within the sub-field period for displaying the multi-tone image for the left eye and A subfield group in which the gradation display of the normal display module is completed is set within a subfield period for displaying the right-eye multi-tone image, and And having a normal display module for displaying a normal image in accordance with the subfield group.

As described above, the gradation display of the normal display module is completed within the subfield period for displaying the left-eye multi-tone image and the subfield period for displaying the right-eye multi-tone image. By setting a subfield group and displaying a normal image according to the subfield group, even if a normal display module and a stereoscopic display module are used together, multi-tone display of a normal image is accurately performed. be able to.

Therefore, even if the user views the stereoscopic image display device in which the stereoscopic display module and the normal display module coexist through the shutter glasses, it is possible to view an accurate multi-gradation display.

[0017]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of an example of the stereoscopic image display device of the present invention. The stereoscopic image display device of FIG. 1 includes one stereoscopic display module 10 and two normal display modules 11a and 11b.
The stereoscopic image display device displays a stereoscopic image only in a visually important central portion, so that a stereoscopic display module 1
0 is arranged, and normal display modules 11a and 11b are arranged on the left and right portions.

FIG. 2 shows an example of a time arrangement of subfields in the stereoscopic image display device of the present invention. In FIG.
One field has ten subfields SF1 to SF1.
0. Further, each subfield SF1 to SF1
The SF 10 includes an address period and a display period.

As shown in FIG. 2B, the configuration of the sub-field in the driving sequence for stereoscopic display is based on "stereoscopic image display method and apparatus" (Japanese Patent Application No. 10-282590).
No.). That is, the stereoscopic display module outputs a signal for opening the L-side shutter of the shutter glasses 12 in synchronization with the start point of the address period of the subfield SF1 of the first L-side image as shown in FIG. I do. Similarly, subfield SF6 of the first R-side image
In synchronization with the start point of the address period, a signal for opening the R-side shutter of the shutter glasses 12 is output as shown in FIG.

Therefore, the shutter glasses 12 are controlled to open the L-side shutter in the first half of one field and open the R-side shutter in the second half of one field.
A user who views the stereoscopic display module through the shutter glasses 12 looks at the first half of one field (sub-fields SF1 to SF5) with the left eye, and looks at 1 with the right eye.
The latter half of the field (subfields SF6 to SF1)
Observe 0).

In the three-dimensional image display apparatus of the present invention, the L-side image is displayed in the first half subfields SF1 to SF5, and the R-side image is displayed in the second half subfields SF6 to SF10. In FIG. 2B, since five subfields are assigned to the L-side image and the R-side image, respectively, a 5-bit digital signal can be handled, and a 32-tone image can be displayed. Is possible. In this manner, both the L-side and R-side images are driven by the same light emission scheme (drive sequence), and this is repeated for each field, so that the L-side and R-side images are alternately displayed on the entire screen.

In the driving sequence for stereoscopic display, a set of subfields for displaying an image for the left eye and a set of subfields for displaying an image for the right eye are divided. In accordance with a set of subfields of the drive sequence, the driving sequence is divided into a subfield period for displaying a left-eye image and a subfield period for displaying a right-eye image.

As shown in FIG. 2C, the configuration of the subfield in the normal display driving sequence is such that a subfield period for displaying a left-eye image and a subfield period for displaying a right-eye image are respectively provided. It is created in a set of subfields such that the gradation display is completed within the period. However, the set of subfields in the drive sequence for normal display may be the same for the subfield period for displaying the image for the left eye and the subfield period for displaying the image for the right eye.

That is, in the normal display module, in the subfield period for displaying the image for the left eye and the subfield period for displaying the image for the right eye, the same subfield in which the gradation display is completed in each period is provided. By displaying the set repeatedly, it is possible to display with the correct gradation even if the normal display is mixed with the stereoscopic display.

FIG. 3 is a block diagram showing one embodiment of the three-dimensional image display device of the present invention. The stereoscopic image display device of FIG.
Analog / digital converters (hereinafter, referred to as A / D converters) 20 and 30, synchronization circuits 21 and 31, inverse gamma correction circuits 22 and 32, a subfield conversion circuit 23 for normal display, and a panel drive circuit 24 , 34, PDP panels 25, 35, stereoscopic display subfield conversion circuit 33
, Shutter glasses control circuit 36, shutter glasses 3
And 7.

The normal display module includes an A / D converter 20, a synchronization circuit 21, and an inverse gamma correction circuit 22.
, A normal display subfield conversion circuit 23, a panel drive circuit 24, and a PDP panel 25. The three-dimensional display module includes an A / D converter 30.
A synchronizing circuit 31, a reverse gamma correction circuit 32, a stereoscopic display subfield conversion circuit 33, and a panel driving circuit 3.
4, PDP panel 35, shutter glasses control circuit 3
6 is included. The three-dimensional image display device in FIG. 3 is an example, and one or more normal display modules and one
It can be configured with one or more three-dimensional display modules.

The operation of the three-dimensional image display device shown in FIG. 3 will be described below. The normal display video input signal a and the stereoscopic display video input signal b are synchronized signals. The normal display video input signal a is supplied to the A / D converter 20 and the synchronization circuit 21. The synchronization circuit 21 detects a horizontal synchronization signal and a vertical synchronization signal from the supplied normal display video input signal a, and supplies the horizontal synchronization signal and the vertical synchronization signal to the normal display subfield conversion circuit 23.

The A / D converter 20 converts the supplied normal display video input signal a into a digital signal, and supplies the digital signal to the inverse gamma correction circuit 22. The inverse gamma correction circuit 22 performs inverse gamma correction on the supplied digital signal. Usually, the television signal is a CRT
Since the display is basically performed, gamma correction is performed on the transmission side. Therefore, the inverse gamma correction circuit 22 performs the inverse gamma correction on the gamma correction performed on the transmission side according to the PDP.

Normal display sub-field conversion circuit 23
, A horizontal synchronizing signal and a vertical synchronizing signal are supplied from a synchronizing circuit 21, while a digital video signal subjected to inverse gamma correction is supplied from an inverse gamma correction circuit 22. The normal display subfield conversion circuit 23 decomposes the digital video signal into subfield signals according to the horizontal synchronization signal and the vertical synchronization signal, and outputs the decomposed subfield signal to the panel drive circuit 24.

Normal display sub-field conversion circuit 23
May include a pseudo gradation generating circuit that reduces the number of bits of a video signal to a gradation (bit number) that can be actually displayed on the PDP panel 25 by using an error diffusion method, a dither method, or the like. The subfield signal output from the subfield conversion circuit for normal display 23
It is supplied to the P panel 25. The PDP panel 25 displays a normal image according to the supplied subfield signal.

On the other hand, the video input signal b for stereoscopic display is A /
It is supplied to the D converter 30 and the synchronization circuit 31. The synchronizing circuit 31 detects a horizontal synchronizing signal and a vertical synchronizing signal from the supplied stereoscopic display video input signal b, and detects the horizontal synchronizing signal and the vertical synchronizing signal.
A vertical synchronizing signal is converted into a stereoscopic display subfield conversion circuit 33.
To supply.

The A / D converter 30 converts the supplied stereoscopic video input signal b into a digital signal and supplies the digital signal to the inverse gamma correction circuit 32. The inverse gamma correction circuit 32 performs inverse gamma correction on the supplied digital signal. The subfield conversion circuit for stereoscopic display 33 is supplied with a horizontal synchronizing signal and a vertical synchronizing signal from the synchronizing circuit 31, and is supplied with a digital video signal subjected to inverse gamma correction from the inverse gamma correction circuit 32.

Subfield conversion circuit 33 for stereoscopic display
Decomposes the digital video signal into subfield signals in accordance with the horizontal synchronization signal and the vertical synchronization signal, and outputs the decomposed subfield signal to the panel drive circuit 34. Also,
The stereoscopic display subfield conversion circuit 33 supplies a timing signal for driving the shutter of the shutter glasses 37 to the shutter glasses control circuit 36. The subfield signal output from the stereoscopic display subfield conversion circuit 33 is transmitted to the PDP panel 3 via the panel driving circuit 34.
5 is supplied. The PDP panel 35 displays a stereoscopic image according to the supplied subfield signal.

Further, the shutter glasses control circuit 36 responds to the timing signal supplied from the stereoscopic display subfield conversion circuit 33 by setting the L of the shutter glasses 37 as shown in FIGS. 2 (D) and 2 (E). The shutter glasses 3 generate the opening / closing signals of the side shutter and the R side shutter, and transmit the opening / closing signals of the L side shutter and the R side shutter to the shutter glasses 3.
7 The shutter opening / closing signal can be supplied to the shutter glasses 37 by a wired method using a conductive wire or the like or a wireless method using infrared rays or the like.

In the above-described embodiment, a stereoscopic image and a normal image are displayed using ten subfields, but the present invention is not limited to this. In the stereoscopic display module, one field is divided into N subfields, and the first N / 2 subfields are divided into L images (or R images).
Image) and the latter half N / 2 subfields are assigned to the R image (or L image). Then, the shutter glasses 37 may be opened and closed in synchronization with the start of the address period of the first subfield of the first half N / 2 subfields and the second half N / 2 subfields. Also,
The number of subfields of the normal image and the stereoscopic image may be different, and the grayscale display of the normal display module may be completed in N / 2 subfield periods in the stereoscopic display module.

[0036]

As described above, according to the present invention, even when a stereoscopic image display device in which a stereoscopic display module and a normal display module are mixed through shutter glasses is viewed, accurate multi-gradation display is possible. Can be observed.

Therefore, it is possible to realize an image display device in which only the central part of the screen that is visually important is constituted by one or more three-dimensional display modules, and the part other than the central part of the screen is constituted by one or more normal display modules. It is possible.

[0038]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of a stereoscopic image display device of the present invention.

FIG. 2 is a time sequence of an example of a subfield in the stereoscopic image display device of the present invention.

FIG. 3 is a block diagram of an embodiment of the stereoscopic image display device of the present invention.

FIG. 4 is a diagram illustrating an example of a case where a normal display module and a stereoscopic display module are used together;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 stereoscopic display module 11 a, 11 b normal display module 12 shutter glasses 20, 30 analog / digital converter 21, 31 synchronization circuit 22, 32 inverse gamma correction circuit 23 normal display subfield conversion circuit 24, 34 panel drive circuit 25 , 35 PDP panel 33 Subfield conversion circuit for stereoscopic display 36 Shutter glasses control circuit 37 Shutter glasses

Claims (3)

[Claims] 1. A three-dimensional image display method using a mixture of a three-dimensional display module for displaying a time-division binocular three-dimensional image and a normal display module for displaying a normal image, wherein one screen display period is divided into a plurality of subfields. The multi-tone image for the left eye and the multi-tone image for the right eye of the stereoscopic display module are sequentially displayed according to the combination of the divided sub-fields, while the sub-display for displaying the multi-tone image for the left eye is displayed. A subfield group in which the gray scale display of the normal display module is completed is set within a field period and a subfield period for displaying a right-eye multi-tone image, and a normal image is displayed according to the subfield group. The shutter glasses according to the sub-field period of the left-eye multi-tone image and the sub-field period of the right-eye multi-tone image. Stereoscopic image display method characterized in that it comprises a step of controlling the opening and closing of the terpolymer. 2. A stereoscopic image display device using a mixture of a stereoscopic display module for displaying a time-division binocular stereoscopic image and a normal display module for displaying a normal image, wherein one screen display period is divided into a plurality of subfields. The multi-tone image for the left eye and the multi-tone image for the right eye of the stereoscopic display module are sequentially displayed according to the combination of the divided sub-fields, while the multi-tone image for the left eye and the multi-tone image for the right eye are displayed. A stereoscopic display module that controls opening and closing of shutters of shutter glasses in synchronization with image display, and a subfield period for displaying the left-eye multi-tone image and a right-eye multi-tone image for displaying the multi-tone image A subfield group in which the gradation display of the normal display module is completed is set within the subfield period, and a normal image is displayed according to the subfield group. Stereoscopic image display apparatus characterized by comprising a module for normal display to. 3. The stereoscopic image according to claim 2, wherein the normal display module completes gradation display of the normal display module during a period in which a shutter of the shutter glasses is open. Display device.