JP2000287224A - Stereoscopic display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a stress from giving to a viewer caused by a reverse vision at an undesired time because display changeover between a normal vision and a reverse vision is not made in a stereoscopic display device in response to a motion of an object even when the object moves in an area at the outside of a proper vision. SOLUTION: The stereoscopic display device using a parallax barrier or a lenticular lens or the like is provided with a position sensor 8 that senses a position of a viewer, a display area revision means 10 that changes a forming position of a right eye image display area and a left eye image display area depending on the sensing result of the position sensor 8 to keep a proper vision state of the viewer. The position sensor 8 has a sensor light emitting section 4 and a CCD camera section 5, and the sensor light emitting section 4 and the CCD camera section 5 are placed so that an emission range of the sensor light emitting section 4 and a light receiving range of the CCD camera section 5 are in crossing around a stereoscopic vision position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional display device configured to detect a position of an observer and maintain an appropriate viewing state of the observer.

[0002]

2. Description of the Related Art Conventionally, a stereoscopic display device having a position detecting sensor for detecting a position of an observer is disclosed in Japanese Patent Application Laid-Open No. 9-80354.
No., published in Japanese Unexamined Patent Publication No.

In this apparatus, a position detection sensor is arranged behind a backlight of a three-dimensional display device, and the direction of light emission of the backlight is controlled according to the position of the observer detected by the position detection sensor. The image corresponding to the position is displayed on the display unit.

[0004]

However, since only one position detecting sensor detects the position of the observer, the movement in the direction parallel to the three-dimensional display device can be accurately detected. The position in the front-rear direction with respect to the three-dimensional display device cannot be detected with high accuracy.

[0005] That is, when the observer is observing at a position suitable for observing the stereoscopic display, that is, at a suitable viewing position, he moves his hand in front of the observer, or moves between the observer and the stereoscopic display device. When others crossed, the display to the observer changed in response to the movement.

[0006] For this reason, even if the observer does not change the observing position, the observer may temporarily fall into the state of pseudopsis, thereby giving stress to the observer.

The present invention has been made to solve such a problem.

[0008]

A three-dimensional display device according to the present invention forms a right-eye image display area and a left-eye image display area near a three-dimensional observation position using a parallax barrier or a lenticular lens. A position for detecting the position of the observer in a stereoscopic display in which the right eye of the observer is present in the image display region for the right eye and the left eye of the observer is present in the image display region for the left eye. A detection sensor;
Display area changing means for changing a position formed between the right-eye image display area and the left-eye display area according to the detection result of the position detection sensor, and maintaining an appropriate viewing state of the observer,
And the position detection sensor has a light-emitting unit and a light-receiving unit, and the light-emitting unit and the light-receiving unit intersect the irradiation range of the light-emitting unit and the light-receiving range of the light-receiving unit near the stereoscopic observation position. It is the structure arranged so that it may be.

The light emitting section of the position detecting sensor has a spread angle adjusting section, and the spread angle adjusting section is configured to narrow the light emission of the light emitting section into an elongated shape.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1A, reference numeral 1 denotes a three-dimensional display device;
2 is a display screen comprising a liquid crystal panel for displaying a stereoscopic image,
Reference numeral 3 denotes a leg, 4 is disposed on the leg 3, and a sensor light-emitting unit serving as a light-emitting unit that emits infrared light. 5 is a light-receiving element that detects infrared light reflected from the sensor light-emitting unit 4 when the infrared light hits an object. It is a CCD camera unit serving as a unit.

As shown in FIG. 1B, the sensor light receiving section 4 has a plurality of infrared LEDs 41 arranged side by side in the horizontal direction, and each infrared LED 41 is provided in front of the plurality of infrared LEDs 41.
A lens 42 serving as a divergence angle adjusting unit that narrows the infrared rays 4b radiated from D in the vertical direction, that is, narrows the divergence angle, and forms a linearly elongated irradiation range β.

In FIG. 2, reference numeral 6 denotes a three-dimensional image to which a right-eye image R and a left-eye image L formed by a three-dimensional image forming apparatus (not shown) are inputted and edited into a video signal which can be displayed three-dimensionally on the display screen 2. The reproduction circuit 7 converts the video signal edited by the stereoscopic image reproduction circuit 6 into a right-eye image display area and a left-eye image display area formed in front of the display screen 2 in accordance with an instruction from a switching instruction circuit described later. A display image switching circuit for controlling the image sensor to be exchanged; 8 a position detection sensor having a sensor light emitting unit 4 and a CCD camera unit 5; 9 a head position of an observer based on the result detected by the position detection sensor 8; A center position calculating circuit for calculating the center position; and 10 a switching instruction as a display area changing means for instructing the display video switching circuit 7 to switch the formation position based on the calculation result (center position) of the center position calculating circuit. It is a road.

The center position calculating circuit 9 divides the image photographed by the CCD camera section 5 into a plurality of parts as shown in FIG.
The light amount of “a” is calculated, and it is determined that the center of the observer's head exists in the region with the largest light amount.

Each of the plurality of divided areas substantially matches the width of the right-eye image display area or the left-eye image display area formed by the three-dimensional image reproduction circuit 6.

The method of calculating the center position of the observer's head is not limited to this. The horizontal length and coordinates of the infrared reflected light 4a are calculated, and the center position of this length is determined by the observer's head. May be determined as the center position.

Now, the position detecting sensor 8 and the observer X will be described below.
Will be described. FIG. 4 shows an arrangement relation viewed from the side to explain this relation.

First, the CCD camera unit 5 adjusts the photographing direction and the size of the viewing angle θ so as to photograph only the head of the observer X who is looking at the display screen 2 as much as possible. You have set. Further, the infrared rays 4b emitted from the sensor light emitting unit 4 at the lower part of the display screen 2 are radiated upward to the observer X. The irradiation range β of the sensor light-emitting unit 4 is irradiated with light having a narrow linear width in the horizontal direction.

As shown in FIG. 4, the light emitting direction is a range Z of a suitable viewing position suitable for viewing a stereoscopic display on the display screen 2.
The point m at the forefront and at the intersection with the lower end of the viewing angle
And a point n that intersects the upper end of the viewing angle at the rear end of the range Z of the suitable viewing position.

Therefore, the infrared rays 4b and C
The viewing angle of the CD camera section 5 intersects with the suitable viewing position range Z.

With such a configuration, for example, at a position before the suitable viewing position range Z, that is, at the position a of the observer X in FIG. 4, as shown in FIG. Since the infrared light 4b generated from the sensor light emitting unit 4 passes through a position deviated from the viewing angle θ of 5, the reflected light 4a of the infrared light 4b is not detected by the CCD camera unit 5. On the other hand, as shown in FIGS. 5B and 5C, the observer X
Is located only in the range Z of the suitable viewing position, the reflected light 4a is detected, and the center position of the head is calculated.

The operation in the configuration of FIG. 2 will be described.

First, a right-eye image R and a left-eye image L are input to a three-dimensional image reproducing device 6 from a three-dimensional image forming device (not shown). Then, the stereoscopic image reproduction circuit 6 edits the input image so that it can be displayed on the display screen 2 and outputs the edited image as a video signal.

More specifically, a video signal used in a parallax barrier type or lenticular type display device is obtained by dividing an image for the left and right eyes into a strip according to the width of the barrier and the lenticular lens. They are rearranged alternately and output as video signals.

In parallel with this, the position detection sensor 8 and the center position calculation circuit 9 calculate the center position of the observer's head. Upon receiving the calculated value, when the switching instruction circuit 10 can confirm that the position of the observer's head has moved, the display video switching is performed so that the display order of the left and right eye images displayed alternately is exchanged. Instruct circuit 7.

By this operation, as shown in FIG. 6, the right eye of the observer X can see the image for the right eye and the left eye can see the image for the left eye. Even if X moves the head, the image for the left eye can be seen by the observer's right eye and the image for the right eye can be seen by the left eye. By detecting the position with the position detection sensor 8, the position in the reverse viewing state becomes the normal viewing state, the position in the normal viewing state becomes the reverse viewing state, and the observer X can see in the normal viewing state.

In the above-described embodiment, by disposing the CCD camera unit 5 at the center upper position with respect to the display screen 2, the deviation between the normal viewing position and the reverse viewing position is small, and the detection can be performed with high accuracy. .

[0028]

According to the present invention, even if an object moves in a region deviating from the proper viewing position, the display switching operation of the stereoscopic display device between the normal and reverse viewing states is not performed in response to the movement. In addition, when it is not desired, it is possible to suppress a situation in which the observer is placed in a pseudo-visual state and gives stress.

[Brief description of the drawings]

FIG. 1A is a schematic view of a stereoscopic display device of the present invention,
(B) is a sectional view of a main part of the sensor light emitting unit.

FIG. 2 is a schematic control block diagram of the stereoscopic display device of the present invention.

FIG. 3 is a diagram illustrating a method of calculating a center position of a head of an observer.

FIG. 4 is a diagram illustrating an arrangement relationship between a position detection sensor and an observer.

FIG. 5 is a diagram showing an operation of the position detection sensor in a range of a suitable viewing position.

FIG. 6 is a diagram showing a position in a normal viewing state and a position in a reverse viewing state with respect to a display screen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 3D display apparatus 2 Display screen 4 Sensor light-emitting part 5 CCD camera part 7 Display image switching circuit 8 Position detection sensor 9 Center position calculation circuit 10 Switching instruction circuit

Continuation of the front page F term (reference)

Claims (2)

[Claims] An image display area for a right eye and an image display area for a left eye are formed near a stereoscopic observation position using a parallax barrier or a lenticular lens, and the right eye of the observer is placed in the image for the right eye. In the display area, and in a case where stereoscopic display is performed by causing the left eye of the observer to be in the image display area for the left eye, a position detection sensor that detects the position of the observer, and a detection result of the position detection sensor Display area changing means for changing a position where the right-eye image display area and the left-eye display area are formed in accordance with the position, and maintaining a proper viewing state of the observer. And a light receiving unit, wherein the light emitting unit and the light receiving unit are arranged so that an irradiation range of the light emitting unit and a light receiving range of the light receiving unit intersect near the stereoscopic observation position. 3D display device. 2. The light emitting section of the position detecting sensor has a spread angle adjusting section, and the spread angle adjusting section narrows an irradiation range of the light emitting section in a horizontally elongated manner.
3. The stereoscopic display device according to 1.