KR101365425B1 - Apparatus of testing auto stereoscopic display device - Google Patents

Abstract

Disclosed is an inspection device for a parallax barrier type stereoscopic image display device. More specifically, the present invention includes a measuring module for measuring luminance monocular contrast for a right eye and luminance monocular contrast for a left eye to calculate three-dimensional (3D) contrast and a transfer device on which a stereoscopic image display device is arranged on the center thereof and which is for transferring the stereoscopic image display device to a left distance measuring point and a right distance measuring point. The quality of the stereoscopic image display device which is a target of inspection is determined according to the 3D contrast or 3D crosstalk based on the 3D contrast. [Reference numerals] (801) Measuring module; (803) 3D LCD module; (806) Transfer device; (AA) Left distance measuring point; (BB) Right distance measuring point

Description

Inspection device of three-dimensional image display device {APPARATUS OF TESTING AUTO STEREOSCOPIC DISPLAY DEVICE}

The present invention relates to a stereoscopic image display device. More specifically, the present invention relates to an inspection apparatus for a stereoscopic image display device.

In general, a method of implementing a stereoscopic image (or a 3D image) is implemented by illuminating different images on two eyes of a human, and a stereoscopic image display device uses separate glasses for illuminating different images on two eyes. Depending on whether or not it is necessary, it is divided into a three-dimensional stereoscopic image display device and a non-stereoscopic 3D image display device.

Spectacular stereoscopic image display apparatus must bear the inconvenience of observer wearing special glasses, but non-stereoscopic stereoscopic image display apparatus can feel stereoscopic image simply by staring at the screen without wearing the above glasses. Since the shortcomings of the stereoscopic image display device can be solved, many researches on this have been conducted. The non-stereoscopic 3D display device is largely classified into a lenticular device and a parallax-barrier device.

Hereinafter, an operation of the 3D image display device using the parallax-barrier method will be described with reference to FIGS. 1A and 1B.

1A is a cross-sectional view of a stereoscopic image display device using a parallax barrier, and FIG. 1B is a perspective view of a stereoscopic image display device using a parallax barrier.

As shown in FIGS. 1A and 1B, the stereoscopic image display device using the parallax-barrier method has a left image L and a right side facing a vertical direction (YY ′ direction in FIG. 1B) corresponding to left and right eyes, respectively. And a display module 10 in which images R are alternately arranged in a horizontal direction (XX 'direction in FIG. 1B), and a bar-shaped barrier film facing the vertical direction called a barrier 20 in front of the display module 10. As shown in FIG. 1A, the 3D image display device displays the light corresponding to the left image L only to the left eye, and the light corresponding to the right image R only to the right eye. And the barrier 20, and the left and right images L and R divided through the barriers 20 are separated and observed to feel a three-dimensional effect.

Hereinafter, the stereoscopic image content used in the parallax barrier method will be described.

2 is a diagram illustrating a left image and a right image respectively captured by two cameras.

The two cameras or camera modules may capture a left image L as shown in FIG. 2 (1) and a right image R as shown in FIG. 2 (2). As shown in FIG. 2, the left image L and the right image R may be a still image, a moving image, or may correspond to general image contents through respective cameras.

3 is a diagram illustrating an image obtained by synthesizing a left image and a right image photographed using two cameras.

Specifically, the left image and the right image photographed by the two cameras as shown in (1) and (2) of FIG. 2 are input to the stereoscopic image generating means and are respectively divided into vertical columns in the horizontal direction. Alternately placed and synthesized. In this way, the left and right images alternately arranged spatially are viewed as a stereoscopic image by showing only the left image in the left eye and the right image in the right eye through the display module using the parallax barrier as shown in FIGS. 1A and 1B. .

In the conventional parallax barrier type stereoscopic image display module, as illustrated in FIGS. 1A and 1B, only a stereoscopic image synthesized by splitting a left image and a right image into vertical columns and arranging them in a horizontal direction is used. Recognition as stereoscopic images was possible. However, according to the "cell structure parallax-barrier and the stereoscopic image display apparatus using the same (patent application No. 2005-0127631) filed by the present inventor and filed by the present applicant, the parallax barrier described above is a cell system. Therefore, in the case of synthesizing a stereoscopic image, the direction of the synthesis need not be limited to any one direction, and the synthesizing the stereoscopic image and displaying the same. The stereoscopic image can be displayed by adjusting the barrier direction of the parallax barrier type display module.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inspection apparatus for a stereoscopic image display device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an embodiment of the present invention, an apparatus for inspecting a parallax barrier type stereoscopic image display device includes: a measurement module for measuring a luminance monokula contrast for a left eye and a luminance monokula contrast for a right eye for calculating 3D contrast; And a moving device arranged at a central portion of the stereoscopic image display device to be inspected to move the stereoscopic image display device to a left or right side point of the inspection. Whether or not good quality is characterized in that determined by the 3D crosstalk or 3D crosstalk based on the 3D contrast.

Here, the position of the stereoscopic image display device and the distance to the measurement module before moving to the left side reference point or the right side reference point is preferably an optimal viewing distance for viewing stereoscopic images.

More specifically, the optimum viewing distance is characterized by the following equation A.

≪ EMI ID =

(단, IPD(Inter-pupil distance)는 동공 간 거리로서 상수,

는 상기 검수의 대상이 되는 입체 영상 표시 디바이스의 사전에 정해진 최소 3D 크로스톡,

는 상기

에 대응하는 시야각을 지칭한다)

(However, IPD (Inter-pupil distance) is the distance between the pupils, a constant,

Is a predetermined minimum 3D crosstalk of a stereoscopic image display device to be inspected;

Quot;

Refers to the viewing angle corresponding to

The optimum viewing distance may be set in advance according to the type of stereoscopic image display device to be inspected.

On the other hand, the distance between the central portion and the left point and the distance between the center and the right point is characterized in that half the distance between the pupil.

는 아래 수학식 B에 의하여 결정되는 것을 특징으로 한다.Preferably, the 3D contrast

Is determined by Equation B below.

<Equation B>

(단,

은 상기 우안을 위한 루미넌스 모노쿨라 컨트라스트이고,

은 상기 좌안을 위한 루미넌스 모노쿨라 컨트라스트를 지칭한다)

(only,

Is the luminance monokula contrast for the right eye,

Refers to the luminance monokula contrast for the left eye)

은 아래 수학식 C와 같이 정의되는 것을 특징으로 한다.Also, 3D Crosstalk

Is defined as Equation C below.

<Equation C>

이 기 설정된 값 이하인지 여부에 따라 결정되는 것을 특징으로 한다. 여기서, 상기 기 설정된 값은, 사용자의 설정에 따라 변경될 수 있으며, 바람직하게는, 5％ 내지 10％ 이내의 값인 것을 특징으로 한다.On the other hand, whether or not the quality of the three-dimensional image display device that is the subject of the inspection, the 3D crosstalk

It is determined according to whether or not the predetermined value. Here, the predetermined value may be changed according to a user's setting, and preferably, the value is within 5% to 10%.

The inspection apparatus of the stereoscopic image display device according to the embodiments of the present invention may provide accuracy and speed in inspecting the stereoscopic image display device.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1A is a cross-sectional view of a stereoscopic image display device using a parallax barrier, and FIG. 1B is a perspective view of a stereoscopic image display device using a parallax barrier.
2 is a diagram illustrating a left image and a right image respectively captured by two cameras.
3 is a diagram illustrating an image obtained by synthesizing a left image and a right image photographed using two cameras.
4 is a diagram for describing a concept of performance evaluation of a stereoscopic image display device using parallax-barrier.
5 is another diagram for describing a concept of performance evaluation of a stereoscopic image display device using parallax-barrier.
FIG. 6 is a diagram for describing a 3D viewing angle and a viewing distance concept of a parallax barrier device.
7 is a view for explaining the principle of calculating the 3D optimal viewing distance according to an embodiment of the present invention.
8 shows an inspection apparatus of a stereoscopic image display device according to the present invention.
9 and 10 show an example in which the inspection apparatus of the stereoscopic image display device performs the left eye inspection.
11 and 12 illustrate examples in which the inspection apparatus of the stereoscopic image display device performs the right eye inspection.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, those skilled in the art will appreciate that the present invention may be practiced without these specific details. In some instances, well-known structures and devices are omitted or shown in block diagram form around the core functions of each structure and device in order to avoid obscuring the concepts of the present invention. In the following description, the same components are denoted by the same reference numerals throughout the specification.

Prior to describing the present invention, a concept of performance evaluation of a stereoscopic image display device using parallax-barrier will be briefly described.

4 is a diagram for describing a concept of performance evaluation of a stereoscopic image display device using parallax-barrier.

Referring to FIG. 4, when looking at a specific point of a 3D image display device using a parallax-barrier from a viewer's point of view, a factor for performance evaluation is defined.

Here, it is assumed that the position of an observer is (x ₀ , y ₀ , z ₀ ) in coordinates, and the position of the specific point is (x _e , y _e , z _e ) in coordinates. In addition, it is assumed that the center point of the inter-pupil distance (IPD) of the viewer as the position of the observer.

와

는 아래 수학식 1에 따라 유도될 수 있다.In this case, the factor for performance evaluation

Wow

May be derived according to Equation 1 below.

,

)이고, 우안을 위한 성능 평가 인자는 (

,

)로 정의할 수 있다.In particular, the performance factor for the left eye is (

,

), And the performance factor for the right eye is (

,

Can be defined as

로, 우안을 위한 루미넌스 모노쿨라 컨트라스트

로 정의할 수 있으며, 이는, 아래 수학식 2와 같이 정의된다.According to this definition, when the position of the viewer is (x ₀ , y ₀ , z ₀ ) in coordinates, and the position of the specific point is (x _e , y _e , z _e ) in coordinates, Luminance Monokula Contrast for Left Eye

Luminous Monokula Contrast for Low, Right Eye

It may be defined as, which is defined as in Equation 2 below.

In Equation 2, Y _WRBL means luminance when the right eye image is white and the left eye image is black, and Y _BRWL means the luminance when the right eye image is black and the left eye image is white. _BRBL means luminance when both the right eye image and the left eye image are black. This is illustrated with reference to the drawings.

5 is another diagram for describing a concept of performance evaluation of a stereoscopic image display device using parallax-barrier.

Referring to FIG. 5, a pattern for measuring Y _WRBL , Y _BRWL and Y _BRBL is illustrated. In particular, it can be seen that a single image is generated by mixing a right eye image and a left eye image in columns. have.

와 우안을 위한 루미넌스 모노쿨라 컨트라스트

를 이용하여 3D 컨트라스트 품질을 아래 수학식 3과 같이 정의할 수 있다.In this case, the luminance monokula contrast for the left eye

Luminous Monokula Contrast for Eyes and Eyes

3D contrast quality may be defined as in Equation 3 below.

는 3D 컨트라스트 품질을,

는 3D 크로스톡(crosstalk)을 나타내며, 특히 3D 크로스톡은 백분율로 정의된다.In Equation (3)

3D contrast quality,

Represents 3D crosstalk, in particular 3D crosstalk is defined as a percentage.

Meanwhile, in the case of the parallax barrier device, since the parallax barrier is designed to physically obscure the pixels of the display to prevent the progress of light, bilateral parallax is generated, and thus, each device has a characteristic value. Is dependent on the direction of travel.

FIG. 6 is a diagram for describing a 3D viewing angle and a viewing distance concept of a parallax barrier device.

Referring to FIG. 6, since the display shields an area where light can be emitted by the parallax barrier, the light of the image separated left and right goes straight in the direction where the barrier is not hidden so that light is emitted.

Due to the influence of light caused by the parallax barrier, the light on the left and right images are separated to the maximum, so that there is an area where the 3D stereoscopic view can be seen best, and there is an area where the light overlaps. There is also an area where the two images look like ghosts. In addition, the edge of the parallax barrier is the area affected by the diffraction of the light and exists as an intermediate region between the light separation and the overlapping area.

은 5％ ∼ 10％정도라고 연구보고 되었으며, 본 발명에서는 성능 평가의 기준은 3D 크로스톡

이 10％ 이내의 값을 가지는 영역으로, 도 6에 나타낸 것과 같이 3D 시야각과 거리의 범위를 설정하였다.Research in the technical field has shown that an acceptable ratio of video interference that a human can see when viewing 3D stereoscopic images, namely 3D crosstalk

Has been reported to be about 5% to 10%, in the present invention, the criterion of performance evaluation is 3D crosstalk

In the region having a value within 10%, the range of 3D viewing angle and distance was set as shown in FIG. 6.

의 값을 통해 영상간섭 비율이 10％인 지점을 기준으로 3D VA(3D View Angle)을 정의하고, 성능평가 값인 3D 시야각의 범위 3D VAR(3D View Angle Range) 값 (성능평가를 위한 3D 시야거리의 범위는 3D VD의 최소와 최대 거리의 범위)을 최종적인 성능평가 값으로 얻어낼 수 있음을 알 수 있도록 나타내었다. 그리고 최상의 3D 입체 영상을 볼 수 있는 관찰자의 각도는 각각의 단안의 콘트라스트가 가장 높은 지점 즉 영상간섭이 가장 최소인 지점이며, 이때의 각도가 3D 최적 시야각 3D OVA(3D Optimum View Angle)으로 정의하였다.In particular, in Fig. 6,

3D VA (3D View Angle) is defined based on the point where the image interference ratio is 10% through the value of, and 3D View Angle Range (3D VAR) value (3D viewing distance for performance evaluation) The range of is shown to show that the minimum and maximum distance of 3D VD) can be obtained as the final performance evaluation value. The angle of the observer who can see the best 3D stereoscopic image is the point where the contrast of each monocular is the highest, that is, the point where the image interference is the minimum, and the angle is defined as 3D Optimum View Angle (3D OVA) .

이 10％인 지점의 3D VA의 최소, 최대 각도를 토대로, 아래 수학식 4와 같이 정의할 것으로 제안한다.In accordance with the above discussion, in the present invention, the 3D viewing distance (3D VD) is the 3D crosstalk of FIG. 6.

On the basis of the minimum and maximum angles of the 3D VA at this 10% point, it is proposed to be defined as in Equation 4 below.

는 3D 크로스톡

이 10％인 지점의 3D VA의 최소, 최대 각도를 의미한다. 다만, 본 발명에서는 설명의 편의를 위하여 3D VD(3D View Distance)를 3D 크로스톡

이 10％인 지점으로 설정하였으나, 이는 예시일 뿐이며, 이는 검수자 임의로 설정 가능한 값이다. 다만, 논의한 바와 같이 3D 크로스톡

은 5％ 에서 10％가 바람직하다.In Equation (4)

3D Crosstalk

The minimum and maximum angle of 3D VA of this 10% point is meant. However, in the present invention, 3D VD (3D View Distance) 3D crosstalk for convenience of explanation.

This point was set at 10%, but this is only an example, which is a value that can be arbitrarily set by the examiner. However, as discussed, 3D Crosstalk

Silver is preferably 5% to 10%.

이 가장 최소인 지점의 거리로써 이때의 3D 최적 시야거리를 수학식 5와 같이 정의할 것을 제안한다.Also, the best distance to view 3D stereoscopic images is 3D Crosstalk

As the distance of the smallest point, it is proposed to define the optimal 3D viewing distance as shown in Equation (5).

는 3D 크로스톡

이 최소값인 지점의 3D VA를 의미한다.In Equation (5)

3D Crosstalk

This is the minimum value of 3D VA.

In Equation 4 and Equation 5, Inter-Pupil Distance (IPD) refers to a distance between pupils of both eyes as described above. In addition, the derivation principle of Equations 4 and 5 will be described with reference to the drawings.

7 is a view for explaining the principle of calculating the 3D optimal viewing distance according to an embodiment of the present invention.

이 가장 최소인 지점이며, 이때의 각도가 3D 최적 시야각 3D OVA(3D Optimum View Angle)

로 정의하였으므로, 이 각도

와 IPD의 1/2 값 B을 이용한다면, C 값을 도출할 수 있다. 즉, C는 삼각 함수 정의에 의하여

로 계산된다.Referring to FIG. 7, the angle of the observer who can see the best 3D stereoscopic image is the point where the contrast of each monocular is highest, that is, 3D crosstalk.

Is the smallest point, and the angle at this time is the 3D Optimum View Angle (3D OVA).

Is defined by

If we use and ½ the value B of IPD, we can derive the value of C. That is, C is defined by trigonometric function definition

.

이므로, 3D 최적 시야거리 A는 상기 수학식 4 및 5와 같이 정의된다.Furthermore, by the Pythagorean theorem, the convention between 3D optimal viewing distance A and 1/2 values B and C of IPD is

Therefore, the 3D optimal viewing distance A is defined as in Equations 4 and 5 above.

Hereinafter, an inspection apparatus of a stereoscopic image display device based on the above-described 3D optimal viewing distance of the present invention will be described.

8 shows an inspection apparatus of a stereoscopic image display device according to the present invention.

Referring to FIG. 8, the inspection apparatus of the stereoscopic image display device according to the present invention includes a measurement module 801 for measuring the luminance monokula contrast for the left eye and the luminance monokula contrast for the right eye, and a 3D object to be inspected. LCD module 803 and mobile device 806. In particular, the measurement module 801 refers to a general luminance measurement device, and the 3D LCD module 803 refers to a parallax barrier type autostereoscopic 3D display device.

In particular, the mobile device 806 moves the 3D LCD module 803 to the right reference point 805 for the right eye stereoscopic image inspection and the left side of the 3D LCD module 803 for the left eye stereoscopic image inspection. A function of moving to the reference point 804 is performed. Thus, the 3D LCD module 803 is arranged to be located at the center point of the mobile device 806.

Furthermore, it is preferable that the distance between the left point 804 and the right point 805 is an IPD, that is, the distance between the pupils, and thus the distance from the center of the mobile device to the left point 804 and the right point of reference. The distance to 805 is preferably IPD / 2.

That is, when the 3D LCD module 803 is moved to the right reference point 805, the measurement module 801 plays a role of the right eye, and the 3D LCD module 803 to the left reference point 804. When moved, the measurement module 801 is to play the role of the left eye.

로서

는 검수 대상인 최적의 3D LCD 모듈에 대응하는 사전에 정해진 값을 사용하여 산출된다. 또한,

는 이 경우의 시야각을 지칭한다.More preferably, the 3D LCD module 803 and the measurement module 801 is characterized in that the 3D optimal viewing distance calculated according to the equation (5) of the present invention. In other words, the 3D optimal viewing distance

as

Is calculated using a predetermined value corresponding to the optimal 3D LCD module to be inspected. Also,

Refers to the viewing angle in this case.

는 3D 크로스톡 값으로서 사전에 정해진 값, 즉 양품이 가져야만 하는 최적의 값으로 고정 시킴으로써, 검수 대상이 되는 상기 3D LCD 모듈(803)의 3D 크로스톡 값을 산출할 수 있다.More specifically,

The 3D crosstalk value can be calculated as a 3D crosstalk value of the 3D LCD module 803 to be inspected by fixing it to a predetermined value, that is, an optimal value that a good product should have.

Hereinafter, with reference to the drawings, it will be described in more detail.

9 and 10 illustrate an example in which the inspection apparatus of the stereoscopic image display device performs the left eye inspection.

First, referring to FIG. 9, the measurement module 801 does not move for the left eye inspection of the stereoscopic image display device, that is, the 3D LCD module 803. ), The effect of moving the 3D LCD module 803 by half the distance between the pupils can be derived.

을 측정할 수 있다.In this case, the measurement module 801 may be facing the 3D LCD module 803 from the left eye as shown in FIG. 10, and the left eye inspection of the 3D LCD module 803 may be performed. That is, the measurement module 801 measures the 3D LCD module 803,

Can be measured.

11 and 12 illustrate examples in which the inspection apparatus of the stereoscopic image display device performs the right eye inspection.

First, referring to FIG. 11, the measurement module 801 does not move for the right-eye inspection of the stereoscopic image display device, that is, the 3D LCD module 803, but moves the mobile device 806 to the right reference point 805. ), The effect of moving the 3D LCD module 803 by half the distance between the pupils can be derived.

을 측정할 수 있다.In such a case, the measurement module 801 may look at the 3D LCD module 803 from the right eye as shown in FIG. 12, and perform right eye inspection of the 3D LCD module 803. That is, the measurement module 801 measures the 3D LCD module 803,

Can be measured.

과

를 이용하여, 상기 수학식 3에 따라 3D 컨트라스트 품질

과, 3D 크로스톡(crosstalk)

를 도출할 수 있다.Measured in this way

and

3D contrast quality according to Equation 3

And 3D crosstalk

Can be derived.

과, 3D 크로스톡(crosstalk)

를 측정할 수 있으며, 이에 따라 보다 효율적인 검수 과정이 진행될 수 있다.According to the present invention, by simply placing the 3D LCD module requiring mass production in the center of the mobile device, the 3D contrast quality quickly

And 3D crosstalk

Can be measured, and thus a more efficient inspection process can be performed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foregoing description of the preferred embodiments of the present invention has been presented for those skilled in the art to make and use the invention. Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I can understand that you can.

Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

A device for inspecting a parallax barrier type stereoscopic image display device,
A measurement module for measuring the luminance monokula contrast for the left eye and the luminance monokula contrast for the right eye for calculation of 3D contrast; And
A stereoscopic image display device to be inspected is disposed in a central portion, and includes a moving device for moving the stereoscopic image display device to a left side point or a right side point;
Whether the quality of the stereoscopic image display device to be inspected is determined by 3D crosstalk based on the 3D contrast or the 3D contrast,
Inspection device. The method of claim 1,
The position of the stereoscopic image display device and the distance to the measurement module before moving to the left or right reference point is an optimal viewing distance for viewing stereoscopic images.
Inspection device. 3. The method of claim 2,
The optimal viewing distance is,
Characterized in accordance with Equation A below,
&Lt; EMI ID =

(However, IPD (Inter-pupil distance) is the distance between the pupils, a constant,

Is a predetermined 3D crosstalk of the stereoscopic image display device to be subjected to the inspection,

Quot;

Refers to the viewing angle corresponding to
Inspection device. The method of claim 3, wherein
The optimal viewing distance is,
It is set in advance according to the type of the three-dimensional image display device which is the object of the inspection,
Inspection device. The method of claim 1,
The distance between the center portion and the left point and the distance between the center portion and the right point is half of the distance between the pupil,
Inspection device. The method of claim 1,
3D contrast above

Quot;
Characterized in accordance with Equation B below,
<Equation B>

(only,

Is the luminance monokula contrast for the right eye,

Refers to the luminance monokula contrast for the left eye)
Inspection device. The method according to claim 6,
3D Crosstalk

Is defined as in Equation C below,
<Equation C>

Inspection device. The method of claim 7, wherein
Whether the quality of the stereoscopic image display device to be inspected is
3D Crosstalk

It is determined according to whether or not the predetermined value,
Inspection device. The method of claim 8,
The preset value is,
It is changed according to the user's settings,
Inspection device. The method of claim 8,
The preset value is,
Characterized in that the value is within 5% to 10%,
Inspection device.

Images