GB2484998A - Optical measurement of stereoscopic display device - Google Patents

Abstract

An optical measuring apparatus and method for a stereoscopic display device such as 3D shutter or polariser glasses 300 measures objective optical characteristics of the device such as luminance and chromaticity. The optical measuring apparatus comprises a test image supplier 100 for generating a 3D test signal, a 3D display 200 for displaying left-eye image and/or right-eye image based on the 3D test signal supplied from the test image supplier. an image selection member (such as the glasses 300) for selectively transmitting the left-eye image and right-eye image displayed on the 3D display, and a light measuring device 400 for measuring intensity or colour information of the image transmitted via the image selection member. The optical characteristics may be luminance, average luminance, interocular luminance difference, luminous non-uniformity, dark-room contrast ratio, white chromaticity, colour gamut, interocular chromatic difference, chromatic non-uniformity, and gamma value for the left eye and right eye images.

Description

OPTICAL MEASURING APPARATUS AND METHOD OF STEREOSCOPIC

DISPLAY DEVICE

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of the Korean Patent Application No. 10- 10-0107078 filed on October 29, 2010, which is hereby incorporated by reference as if fully set forth herein.

BACKGROUND

Field of the Invention

[0002] The present invention relates to a stereoscopic display device, and more particularly, to an optical measuring apparatus and method of stereoscopic display device, which facilitates measurement of optical characteristics of the stereoscopic display device.

Discussion of the Related Art [0003] With the practical use of 3D video broadcasting, a stereoscopic display device has recently attracted great attention as a next generation display device.

Accordingly, there is the increasing need to measure optical characteristics of the stereoscopic display device, and to inform consumers of product superiority.

[00041 However, since the stereoscopic display device is in its early stage, there is no objective standardized system for measuring the optical characteristics of the stereoscopic display device, whereby it is difficult to provide the consumers with information about the optical characteristics of the stereoscopic display device. In this respect, even though there is the great attention to the stereoscopic display device as the next generation display device, the 3D video broadcasting and stereoscopic display device has not been popularized as anticipated.

100051 There is a need for an apparatus (system) and method of measuring the objective optical characteristics of the stereoscopic display device, for example, luminance, average luminance, interocular luminance difference, luminous non-uniformity, dark-room contrast ratio, white chromaticity, colour gamut, interocular chromatic difference, and chromatic non-uniformity, or gamma value.

SUMMARY

[0006] Accordingly, the present invention is directed to an optical measuring apparatus and method of stereoscopic display device that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[00071 An aspect of the present invention seeks to provide an optical measuring apparatus and method of stereoscopic display device, which facilitates to measure the optical characteristics of stereoscopic display device.

100081 Additional advantages and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. These and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

100091 To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided an optical measuring apparatus of stereoscopic display device comprising: a test image supplier for generating a 3D test signal; a 3D display for displaying left-eye image and/or right-eye image based on the 3D test signal supplied from the test image supplier; an image selection member for selectively transmitting the left-eye image and right-eye image to be displayed on the 3D display; and a light measuring device for measuring intensity or color information of the image transmitted via the image selection member.

[0010] In addition, the light measuring device may generate optical characteristic information of the 3D display according to the measured intensity or color information of the image.

[0011J In another aspect of the present invention, there is provided an optical measuring method of stereoscopic display device comprising: generating a 3D test signal; displaying left-eye image and/or right-eye image based on the 3D test signal on a 3D display; transmitting the left-eye image or right-eye image to be displayed on the 3D display through the use of image selection member; and measuring intensity or color information of the left-eye image or right-eye image transmitted via the image selection member through the use of light measuring device.

[0012] In addition, the optical measuring method may further comprise generating optical characteristic information of the 3D display according to the measured intensity or color information of the image through the use of the light measuring device. At this time, the optical characteristic information may include at least one of luminance, average luminance, interocular luminance difference, luminous non-uniformity, dark-room contrast ratio, white chromaticity, colour gamut, interocular chromatic difference, chromatic non-uniformity, and gamma values for the left-eye image and right-eye image.

100131 The light measuring device may be movably provided while being parallel to each of plural measuring points on a screen of the 3D display, wherein the plural measuring points include: a center measuring point which is set to be positioned in the center of the screen of the 3D display; first to fourth measuring points which are set to be positioned at the respective corners of the screen of the 3D display; and fifth to eighth measuring points which are set to be positioned between two neighboring measuring points of first to fourth measuring points.

[0014] The 3D display may display the left-eye image and/or right-eye image which are temporally or spatially divided.

[0015] The image selection member may comprise: a left lens for selecting only the left-eye image displayed on the 3D display; and a right lens for selecting only the right-eye image displayed on the 3D display.

[0016] Any one of the left-eye image and right-eye image may be displayed as a full screen white image, and the other may be displayed as a full screen white image or full screen black image.

[0017] The light measuring device may measure the luminance of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and may measure the luminance of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point.

[0018] The light measuring device may calculate a white luminance for each of the specified measuring points of the left-eye image corresponding to the full screen white image incident via the left lens at the respective positions corresponding to the center measuring point and first to fourth measuring points or the center measuring point and first to eighth measuring points; and the light measuring device may calculate a white luminance for each of the specified measuring points of the right-eye image corresponding to the full screen white image incident via the right lens at the respective positions corresponding to the center measuring point and first to fourth measuring points or the center measuring point and first to eighth measuring points.

[00191 The process of generating the optical characteristic information of the 3D display may comprise: calculating the average luminance of the left-eye image by averaging the white luminance for each of the specific measuring points of the left-eye image; and calculating the average luminance of the right-eye image by averaging the white luminance for each of the specific measuring points of the right-eye image.

[00201 The process of generating the optical characteristic information of the 3D display may further comprise: calculating the interocular luminance difference corresponding to the difference between the average luminance of the left-eye image and the average luminance of the right-eye image.

[0021] The process of generating the optical characteristic information of the 3D display may comprise: calculating the luminous non-uniformity for each of the specified measuring points of the left-eye image by subtracting the average luminance of the left-eye image from the white luminance for each of the specified measuring points of the left-eye image; and calculating the luminous non-uniformity for each of the specified measuring points of the right-eye image by subtracting the average luminance of the right-eye image from the white luminance for each of the specified measuring points of the right-eye image.

10022] At this time, both the left-eye image and right-eye image may be the full screen white images or both the left-eye image may be right-eye image are the full screen black images.

10023] The light measuring device may measure a white luminance of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and a white luminance of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point; and the light measuring device may measure a black luminance of the left-eye image corresponding to the full screen black image incident via the left lens at the center measuring point, and a black luminance of the right-eye image corresponding to the full screen black image incident via the right lens at the center measuring point.

[0024] The process of generating the optical characteristic information of the 3D display may comprise: calculating a dark-room contrast ratio of the left-eye image by dividing the black luminance of the left-eye image into the white luminance of the left-eye image; calculating a dark-room contrast ratio of the right-eye image by dividing the black luminance of the right-eye image into the white luminance of the right-eye image; and calculating a dark-room contrast ratio of the 3D display by averaging the dark-room contrast ratio of the left-eye image and the dark-room contrast ratio of the right-eye image.

[00251 The respective left-eye image and right-eye image may be the same full screen red images, full screen green images, and full screen blue images.

[00261 The light measuring device may measure color information of the left-eye image incident via the left lens at the center measuring point, and may measure color information of the right-eye image incident via the right lens at the center measuring point, wherein the color information of the left-eye image and right-eye image is the chromaticity coordinates of the full screen red images, full screen green images, and full screen blue images.

[0027J The process of generating the optical characteristic information of the 3D display may comprise: calculating the colour gamut of the left-eye image based on the color information of the left-eye image; and calculating the colour gamut of the right-eye image based on the color information of the right-eye image.

[0028] The left-eye image and right-eye image may be the full screen white images, and wherein the light measuring device measures the chromaticity coordinates of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and measures the chromaticity coordinates of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point.

10029] The process of generating the optical characteristic information of the 3D display may comprise: calculating the white chromaticity of the left-eye image corresponding to the chromaticity coordinates of the left-eye image; and calculating the white chromaticity of the right-eye image corresponding to the chromaticity coordinates of the right-eye image.

(00301 The process of generating the optical characteristic information of the 3D display may further comprise: calculating the interocular chromatic difference by subtracting the white chromaticity of the right-eye image from the white chromaticity of the left-eye image.

[0031] The left-eye image and right-eye image may be the full screen white images, wherein the light measuring device measures the chromaticity coordinates for each of the specified measuring points of the left-eye image incident via the left lens at the respective positions corresponding to the center measuring point and first to eighth measuring points; and the light measuring device measures the chromaticity coordinates for each of the specified measuring points of the right-eye image incident via the right lens at the respective positions corresponding to the center measuring point and first to eighth measuring points.

100321 The process of generating the optical characteristic information of the 3D display may comprise: calculating the white chromaticity for each of the specified measuring points of the left-eye image based on the chromaticity coordinates for each of the specified measuring points of the left-eye image; and calculating the white chromaticity for each of the specified measuring points of the right-eye image based on the chromaticity coordinates for each of the specified measuring points of the right-eye image.

[0033J The process of generating the optical characteristic information of the 3D display may comprise: calculating the chromatic non-uniformity for each of the first to eighth measuring points of the left-eye image by subtracting the white chromaticity of the center measuring point from the white chromaticity for each of the first to eighth measuring points of the left-eye image; and calculating the chromatic non-uniformity for each of the first to eighth measuring points of the right-eye image by subtracting the white chromaticity of the center measuring point from the white chromaticity for each of the first to eighth measuring points of the right-eye image.

[00341 Any one of the left-eye image and right-eye image may be displayed as a full screen gray image whose gray scale is changed from a full screen black gray scale to a full screen white gray scale every predetermined number of frames; and the other may be the full screen white image, full screen black image, or full screen gray scale image.

[00351 The light measuring device may measure the luminance for each gray scale of the left-eye image incident via the left lens at the center measuring point, and may measure the luminance for each gray scale of the right-eye image incident via the right lens at the center measuring point.

100361 The process of generating the optical characteristic information of the 3D display may comprise: calculating the gamma value of the left-eye image based on the luminance for each of the gray scales of the left-eye image; and calculating the gamma value of the right-eye image based on the luminance for each of the gray scales of the right-eye image.

[0037] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

100381 The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings: [0039] FIG. 1 illustrates an optical measuring apparatus of stereoscopic display device according to an embodiment of the present invention; [0040] FIG. 2 illustrates stereoscopic glasses held adjacent to a light measuring device shown in FIG. I; [0041] FIG. 3 illustrates stereoscopic glasses held adjacent to a light measuring device while being positioned at a predetermined rotation angle shown in FIG. 1; 10042] FIG. 4 illustrates a light measuring device which is movably provided at a plurality of measuring points according to an embodiment of the present invention; 10043] FIG. 5 illustrates a plurality of measuring points set in a 3D display according to an embodiment of the present invention; [0044] FIG. 6 illustrates an aperture of a light measuring device according to an embodiment of the present invention; 10045] FIGs. 7A and 7B illustrate symbols and their subscripts used for an embodiment of the present invention; and 10046] FIGs. 8A and 8B illustrate a method of measuring gamma values of left-eye image and right-eye image by a light measuring device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0047] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0048] Hereinafter, an optical measuring apparatus for stereoscopic display according to the present invention will be described with reference to the accompanying drawings.

[0049] There is proposed an optical measuring apparatus and method of stereoscopic display device to measure luminance, average luminance, interocular luminance difference, luminous non-uniformity, dark-room contrast ratio, white chromaticity, colour gamut, interocular chromatic difference, and chromatic non-uniformity, or gamma value among the various optical characteristics of the stereoscopic display device.

[0050] The optical measuring apparatus and method of stereoscopic display device according to an embodiment of the present invention may be applied to the following 3D display methods, 1. Stereoscopic image displaying method comprising displays representing temporally interlaced (high frame rate) images and time dividing shutter glasses.

2. Stereoscopic image displaying method comprising displays with front screen switchable polarizer representing temporally interlaced images and linear or circular polarizer glasses.

3. Stereoscopic image displaying method comprising displays with patterned retarder representing spatially interlaced images and linear or circular polarizer glasses.

[0051] All or some parts of these measuring methods may also be applied to other types of stereoscopic displays using glasses not listed above.

[0052] FIG. 1 illustrates an optical measuring apparatus for stereoscopic display according to an embodiment of the present invention.

10053] Referring to FIG. 1, the optical measuring apparatus for stereoscopic display according to an embodiment of the present invention comprises a test image supplier 100, a 3D display 200, image selection member (or polarizer glasses) 300, and a light measuring device 400.

10054] The test image supplier 100 generates a 3D test signal to measure the optical characteristics, and supplies the generated 3D test signal to the 3D display 200. In this case, measuring items for measuring the optical characteristics of the 3D display may be luminance, average luminance, luminous non-unifonnity, interocular luminance difference, dark-room contrast ratio, colour gamut, white chromaticity, white chromatic uniformity, interocular chromatic difference, or gamma value.

[0055] The 3D test signal includes left-eye image (L) and right-eye image (R) which are temporally or spatially divided and displayed. In this case, the left-eye image (L) and right-eye image (R) may be generated corresponding to the measuring items, that is, the optical characteristics of the 3D display 200 to be measured by the light measuring device 400.

[0056] According to one embodiment of the present invention, if measuring the luminance, average luminance, interocular luminance difference, and luminous non-uniformity of the 3D display 200, any one of the left-eye image (L) and right-eye image (R) is displayed as a full screen white image, and the other is displayed as a full screen white image or full screen black image.

[0057] According to another embodiment of the present invention, if measuring the dark-room contrast ratio of the 3D display 200, both the left-eye image (L) and right-eye image (R) are displayed as the full screen white images or full screen black images.

[00581 According to another embodiment of the present invention, if measuring the colour gamut, the left-eye image (L) and right-eye image (R) are displayed as full screen red image, fUll screen green image, or full screen blue image.

100591 According to another embodiment of the present invention, if measuring the white chromaticity, white chromatic uniformity, and interocular chromatic difference of the 3D display 200, the left-eye image (L) and right-eye image (R) are displayed as the full screen white images.

[00601 According to another embodiment of the present invention, if measuring the gamma value of the 3D display 200, any one of the left-eye image (L) and right-eye image (R) is displayed as a full screen gray image, and the other is displayed as a full screen white image or full screen black image. Herein, the full screen gray image is changed in its gray scale from the full screen black image to the full screen white image every predetermined number of frames.

[Table 1]

3D Image Measuring Item -Measuring Point(P) _____________________________ Left-eye Image(L) Right-eye lmage(R) __________________ Luminance, Full Screen White Full Screen White Average Luminance, Full Screen White Full Screen Black P0, P0 -P4, P0 -P8 Interocular Luminance Difference, -Luminous Non-uniformity Full Screen Black Full Screen White Full Screen White Full Screen White Dark-Room Contrast Ratio -P0 Full Screen Black Full Screen Black Full Screen Red Full Screen Red Colour Gamut Full Screen Green Full Screen Green P0 Full Screen Blue Full Screen Blue White Chromaticity, White Chromatic Uniformity, Full Screen White Full Screen White P0, P0 P4, P0 P8 Interocular Chromatic Deference Full Screen Gray Full Screen White Full Screen Gray Full Screen Black Gamma Value Full Screen Gray Full Screen Gray P0 Full Screen Black Full Screen Gray Full Screen Whitc Full Screen Gray ___________________ [0061] The 3D display 200 is held by a holder 210, wherein the holder 210 is installed inside a dark room (not shown) maintained at 1 Lux or less. At this time, the 3D display 200 may be vertically held while being maintained at a predetermined height from the floor of the dark room, or may be held while being rotated at a predetermined direction.

The 3D display 200 displays the left-eye image (L) and/or right-eye image (R) which are temporally or spatially divided based on the 3D test signal supplied from the test image supplier 100. For this, the 3D display 200 may comprise a 3D display panel (not shown) and a panel driver (not shown).

[0062] The 3D display panel using a shutter glass method comprises a plurality of unit pixels (not shown).

[0063] Each of the plural unit pixels includes red, green, and blue sub-pixels for displaying images, which are formed at every region obtained by crossing a plurality of horizontal lines and vertical lines.

[0064] The 3D display panel using a patterned retarder method comprises a plurality of unit pixels (not shown), a plurality of left-eye retarder patterns, and a plurality of right-eye retarder patterns.

[0065] Each of the plural unit pixels includes red, green, and blue sub-pixels for displaying images, which are formed at every region obtained by crossing a plurality of horizontal lines and vertical lines. At this time, the plurality of horizontal lines or vertical lines may be divided into left-eye image displaying lines and right-eye image displaying lines. For example, the odd-numbered horizontal line may be set as the left-eye image displaying line, and the even-numbered horizontal line may be set as the right-eye image displaying line. On the contrary, the odd-numbered horizontal line may be set as the right-eye image displaying line, and the even-numbered horizontal line may be set as the left-eye image displaying line. According to another example, the odd-numbered vertical line may be set as the left-eye image displaying line, and the even-numbered vertical line may be set as the right-eye image displaying line. On the contrary, the odd-numbered vertical line may be set as the right-eye image displaying line, and the even-numbered vertical line may be set as the left-eye image displaying line.

10066] Each of the plural left-eye retarder patterns is formed corresponding to the left-eye image displaying line, to thereby polarize the left-eye image (L) displayed in the left-eye image displaying line. Each of the plural right-eye retarder patterns is formed corresponding to the right-eye image displaying line, to thereby polarize the right-eye image (R) displayed in the right-eye image displaying line. The left-eye retarder pattern and right-eye retarder pattern have the different optical axes from each other.

[0067] The panel driver displays the left-eye image (L) and/or right-eye image (R), which corresponds to the 3D test signal supplied from the test image supplier 100, on the 3D display panel according to a driving method of the 3D display panel.

[0068] In the 3D display panel using the shutter glass method, the panel driver alternately displays the left-eye image (L) and right-eye image (R) corresponding to the 3D test signal supplied from the test image supplier 100 every one frame. For this, the panel driver includes an image converter (not shown) for converting the 3D test signal to the left-eye image (L) and right-eye image (R), and a shutter control signal generator (not shown) for generating and transmitting a shutter control signal corresponding to the left-eye image (L) or right-eye image (R) displayed on the 3D display panel.

[0069] In the 3D display panel using the patterned retarder method, the panel driver displays the left-eye image (L) and right-eye image (R) corresponding to the 3D test signal supplied from the test image supplier 100 in the left-eye image displaying line and right-eye image displaying line. For this, the panel driver may include an image converter (not shown) for converting the 3D test signal to the left-eye image (L) and right-eye image (R).

10070] Meanwhile, if the 3D display panel is a liquid crystal display panel, the 3D display may include a backlight unit (not shown) for emitting light to the 3D display panel.

[0071] The image selection member 300 is installed to face the 3D display 200.

Here, the image selection member 300 can be glasses for shutter glasses method 3D display or pattern retarder method 3D display. The image selection member 300 selectively transmits the left-eye image (L) and right-eye image (R) displayed on the 3D display 200 so that the selectively-transmitted image is supplied to the light measuring device 400. For this, the image selection member 300 may include a left-eye lens of the glasses (for convenience, hereinafter, referred to as left lens') 310, and a right-eye lens of the glasses (for convenience, hereinafter, referred to as right lens') 320.

100721 The left lens 310 transmits only the left-eye image (L) displayed on the 3D display 200. According to one embodiment of the present invention, if the 3D display 200 displays the left-eye image (L) on the basis of the shutter glass method, the left lens 310 comprises a liquid crystal layer which is driven by the shutter control signal outputted from the 3D display 200 so as to transmit only the left-eye image (L). According to another embodiment of the present invention, if the 3D display 200 displays the left-eye image (L) on the basis of the patterned retarder method, the left lens 310 comprises a polarizing filter which transmits only the left-eye image (L). When measuring the optical characteristics of the left-eye image (L) displayed on the 3D display 200, the left lens 310 is installed facing the light measuring device 400. In this case, the left lens 310 may be held in a glass holder (not shown) or the light measuring device 400. When holding the left lens 310 in the glass holder (not shown) or light measuring device 400, the left lens 310 is positioned adjacent to the light measuring device 400 without being in contact with the light measuring device 400.

Preferably, the left lens 310 is provided at a predetermined interval, for example, at least ruin from the light measuring device 400.

100731 The right lens 320 transmits only the right-eye image (R) displayed on the 3D display 200. According to one embodiment of the present invention, if the 3D display displays the right-eye image (R) on the basis of the shutter glass method, the right lens 320 comprises a liquid crystal layer which is driven by the shutter control signal outputted from the 3D display 200 so as to transmit only the right-eye image (R). According to another embodiment of the present invention, if the 3D display 200 displays the right-eye image (R) on the basis of the patterned retarder method, the right lens 320 comprises a polarizing filter which transmits only the right-eye image (R). When measuring the optical characteristics of the right-eye image (R) displayed on the 3D display 200, the right lens 320 is installed facing the light measuring device 400. Tn this case, the right lens 320 may be held in an additional glass holder (not shown) provided adjacent to the light measuring device 400, or a glass holder (not shown) provided in the light measuring device 400.

Preferably, the left lens 310 is provided at a predetermined interval from the light measuring device 400 without being in contact with the light measuring device 400, for example, at least lOlilifi.

100741 As shown in FIG. 3, the image selection member 300 may be held in the glass holder (not shown) while being positioned at a predetermined rotation angle (6) with respect to the light measuring device 400. This is to measure the optical characteristics of the 3D display 200 by rotating the image selection member 300. The rotation angle (6) may be defined by a clockwise rotation angle shown from the light measuring device 400, that is, an angle rotated with respect to a horizontal axis of the 3D display 200.

[00751 The aforementioned glass holder may have a slide mechanism to change the lens from left to right and from right to left, and/or a mechanism to rotate or tilt the left lens 310 and right lens 320, preferably.

[0076] In FIG. 1, the light measuring device 400 measures intensity or color information of the image transmitting via the image selection member 300. At this time, the light measuring device 400 is provided at a predetermined measuring distance (AM) from the 3D display 200, and the light measuring device 400 is installed inside the dark room while being perpendicularly aligned with the 3D display 200. At this time, the measuring distance (AM) is above 2m (meter), or 3L (herein, I' may be a height (V), width (H), or diagonal length of screen of the 3D display).

[00771 As shown in FIGs, 4 and 5, the light measuring device 400 is installed movably in up-and-down directions (Z-axis) and left-and-right direction (X-axis) so that the light measuring device 400 is positioned parallel to each of plural measuring points (P0 to P8) on the screen of the 3D display 200. At this time, the light measuring device 400 is moved to be perpendicular to the measuring points (P0 to P8) on the screen of the 3D display 200.

10078] The plural measuring points may include measuring points 0 to 8 (P0 to P8).

10079] The measuring point 0 (P0) may be set to be positioned in the center of the screen of the 3D display 200.

100801 Each of the measuring points 1 to 4 (P1 to P4) may be set to be positioned at each corner of the screen of the 3D display 200. For example, each of the measuring points 1 to 4 (P1 to P4) is positioned at a predetermined corner portion which is maintained at a predetermined interval corresponding to 1/10 each of the height (V) and width (H) of the screen from each edge of the screen of the 3D display 200.

100811 The measuring points 5 to 8 (P5 to P8) are positioned between each of the neighboring measuring points 1 to 4 (P1 to P4). For example, the measuring points 5 to 8 are positioned on the central lines of the height (V) and width (H) of the screen, and each of the measuring points 5 to 8 is maintained at a predetermined interval corresponding to 1/10 each of the height (V) and width (H) of the screen from each edge of the screen of the 3D display 200.

10082] As shown in Fig. 6, the light measuring device 400 may include an aperture (OA), on which the light transmitting the image selection member 300 is incident. The size of the aperture (OA) is adjusted by an aperture ring 410, wherein the size of the aperture (OA) is smaller than the size of the left lens and right lens. Also, an object lens 420 of the light measuring device 400, on which the light is incident by the aperture (OA), is smaller than the size of the left lens and right lens; and the object lens 420 is positioned adjacent to the aperture (OA) at maximum.

[0083] The tight measuring device 400 measures the intensity or color information of the left-eye image (L) or right-eye image (R) incident via the aperture (OA) and object tens 420.

[0084] Furthermore, the light measuring device 400 analyzes the measured image intensity or color information, and then generates the optical characteristics of the 3D display 200. That is, the light measuring device 400 calculates at least one of luminance (LL, LR), average luminance (LLav, LRaV), luminous non-uniformity (LLLj, ALRi), interocular luminance difference (LXLav, L-R), dark-room contrast ratio (DRCR), colour gamut, white chromaticity (CL(u, v'), CR(u', v')), interocular chromatic difference (ALp.u', z\LRvt), white chromatic uniformity ((AuL, Av'L), (Au'RI, LvR�), and gamma value (GVL, GVR) according to the measured image intensity or color information; and then provides the calculated one to a user. The light measuring device 400 will be described in detail as follows.

[0085] First, the symbols to be described and their subscripts will be defined as shown in FIGs. 7A and 7B.

[0086] In the measuring methods according to the first and second embodiments of the present invention, if measuring the luminance of the 3D display 200, any one of the left-eye image (L) and right-eye image (R) on the 3D display 200 is displayed as the full screen white image (W); and the other is displayed as the full screen white image (W) or full screen black image (B).

[00871 The light measuring device 400 according to the first embodiment of the present invention measures and stores a white luminance (LLO,ww) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[0088] Then, the light measuring device 400 according to the first embodiment of the present invention measures and stores a white luminance (LRO,WW) of the right-eye image (R) incident via the right tens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display are displayed as the full screen white image (W).

[0089] In the meantime, the light measuring device 400 according to the first embodiment of the present invention calculates the luminance (LL) of the left-eye image (L) with the white luminance (LLO,ww) of the left-eye image (L) measured at the measuring point 0 (P0); and also calculates the luminance (LR) of the right-eye image (R) with the white luminance (LRO.WW) of the right-eye image (R) measured at the measuring point 0 (P0).

[0090] The light measuring device 400 according to the second embodiment of the present invention measures and stores a white luminance (LLO,WB) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) is displayed as the full screen white image (W), and the right-eye image (R) is displayed as the full screen black image (B).

10091] Then, the light measuring device 400 according to the second embodiment of the present invention measures and stores a white luminance (LRO,WB) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point p (P0). At this time, the right-eye image (R) on the 3D display 200 is displayed as the full screen white image (W), and the left-eye image (L) on the 3D display 200 is displayed as the full screen black image (B).

10092] In the meantime, the light measuring device 400 according to the second embodiment of the present invention calculates the luminance (LL) of the left-eye image (L) with the white luminance (LLO,wB) of the left-eye image (L) measured at the measuring point o (P0); and also calculates the luminance (LR) of the right-eye image (R) with the white luminance (LRC,WB) of the right-eye image (R) measured at the measuring point 0 (P0).

[00931 In the measuring methods according to the third to sixth embodiments of the present invention, if measuring the average luminance, interocular luminance difference, and luminous non-uniformity, any one of the left-eye image (L) and right-eye image (R) on the 3D display 200 is displayed as the full screen white image (W); and the other is displayed as the full screen white image (W) or full screen black image (B).

[00941 The light measuring device 400 according to the third embodiment of the present invention measures and stores a white luminance (LLO,WW to LL4,ww) for each of measuring points 0 to 4 (P0 to P4) of the left-eye image (L) incident via the left lens 310 at the respective positions corresponding to the measuring points 0 to 4 (P0 to P4). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[0095J Then, the light measuring device 400 according to the third embodiment of the present invention measures and stores a white luminance (LRO,ww to LR4,ww) for each of measuring points 0 to 4 (P0 to P4) of the right-eye image (R) incident via the right lens 320 at the respective positions corresponding to the measuring points 0 to 4 (P0 to P4). At this time, the left-eye image (L) and right-eye image (K) on the 3D display 200 are displayed as the full screen white image (W).

[0096] In the meantime, the light measuring device 400 according to the third embodiment of the present invention calculates the average luminance (LLaV) of the left-eye image (L) and the average luminance (LRaV) of the right-eye image (R) based on the white luminance (LLO,WW to LL4,ww) of the left-eye image (L) and the white luminance (Lrto+ww to LR4,ww) of the right-eye image (R) for each of the measuring points 0 to 4 (P0 to P4) measured at the measuring points 0 to 4 (P0 to P4). At this time, the light measuring device 400 according to the second embodiment of the present invention may calculate the average luminance (LLaV) of the left-eye image (L) and the average luminance (LRaV) of the right-eye image (R) by the following equation 1.

[Equation 1] L20+L11±L12+L13±L14 Liav 5 -LRO±LR1 +LR2±LR3-l-LR4 [0097] The light measuring device 400 according to the fourth embodiment of the present invention measures and stores a white luminance (LLO,WB to LL4,wB) for each of measuring points 0 to 4 (P0 to P4) of the left-eye image (L) incident via the left lens 310 at the respective positions corresponding to the measuring points 0 to 4 (P0 to P4). At this time, the left-eye image (L) on the 3D display 200 is displayed as the full screen white image (W), and the right-eye image (R) on the 3D display 200 is displayed as the full screen black image (B).

[00981 Then, the light measuring device 400 according to the fourth embodiment of the present invention measures and stores a white luminance (LRO,WB to LR4,WB) for each of measuring points 0 to 4 (P0 to P4) of the right-eye image (R) incident via the right lens 320 at the respective positions corresponding to the measuring points 0 to 4 (P0 to P4). At this time, the right-eye image (R) on the 3D display 200 is displayed as the full screen white image (W), and the left-eye image (L) on the 3D display 200 is displayed as the full screen black image (B).

[0099] In the meantime, the light measuring device 400 according to the fourth embodiment of the present invention calculates the average luminance (LLaV) of the left-eye image (L) and the average luminance (LRaV) of the right-eye image (R) based on the white luminance (LLO,WB to LL4,WB) of the left-eye image (L) and the white luminance (Lgo,w13 to LR4,WB) of the right-eye image (R) for each of the measuring points 0 to 4 (P0 to P4) measured at the measuring points 0 to 4 (P0 to P4). At this time, the light measuring device 400 according to the fourth embodiment of the present invention may calculate the average luminance (LLav) of the left-eye image (L) and the average luminance (LRaV) of the right-eye image (R), as shown in the above equation 1.

[00100] The light measuring device 400 according to the fifth embodiment of the present invention measures and stores a white luminance (LLO,WW to LLS,WW) for each of measuring points 0 to 8 (P0 to P8) of the left-eye image (L) incident via the left lens 310 at the respective positions corresponding to the measuring points 0 to 8 (P0 to P8). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[00101] Then, the light measuring device 400 according to the fifth embodiment of the present invention measures and stores a white luminance (LROWW to LR8,WW) for each of measuring points 0 to 8 (P0 to P8) of the right-eye image (R) incident via the right lens 320 at the respective positions corresponding to the measuring points 0 to 8 (P0 to P8). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[00102] In the meantime, the light measuring device 400 according to the fifth embodiment of the present invention calculates the average luminance (LLaV) of the left-eye image (L) and the average luminance (LR3V) of the right-eye image (R) based on the white luminance (LLO,WW to LLS,WW) of the left-eye image (L) and the white luminance (Lgo,ww to LR8,ww) of the right-eye image (R) for each of the measuring points 0 to 8 (P0 to P8) measured at the measuring points 0 to 8 (P0 to P8). At this time, the light measuring device 400 according to the fifth embodiment of the present invention may calculate the average luminance (LLaV) of the left-eye image (L) and the average luminance (LRaV) of the right-eye image (R) by the following equation 2.

[Equation 2] -LLQ -I--I-L22 ± -1-Lk1 ±L15 -F + L17 ± Lzav 9 -L0 ± ± -F LRI -F LR4 ±LRS + + LR7 -F LRO3r 9 [00103] Furthermore, the light measuring device 400 according to the fifth embodiment of the present invention calculates the luminous non-uniformity (ALLI) of the left-eye image (L) for each measuring point based on the calculated average luminance (LLav) of the left-eye image (L) and the white luminance (LLO,ww to LLS,WW) of the left-eye image (L) for each of the measuring points 0 to 8 (P0 to P8); and simultaneously calculates the luminous non-uniformity (ALRj) of the right-eye image (R) for each measuring point based on the calculated average luminance (LRaV) of the right-eye image (R) and the white luminance (LRo,ww to LRS,WW) of the right-eye image (R) for each of the measuring points 0 to 8 (P0 to P8). At this time, the light measuring device 400 according to the fifth embodiment of the present invention may calculate the luminous non-uniformity (ALLI) of the left-eye image (L) and the luminous non-uniformity (ALg1) of the right-eye image (R) by the following equation 3.

[Equation 3] L1-L1, ALR/ = "Ri [00104] In above equation 3, LL' and LRI' indicates the luminance at the measuring points 1 to 8.

[00105] Furthermore, the light measuring device 400 according to the fifth embodiment of the present invention may calculate the interocular luminance difference (ALav,LR) by the difference between the average luminance (LLaV) of the left-eye image (L) and the average luminance (LRaV) of the right-eye image (R).

[00106] The light measuring device 400 according to the sixth embodiment of the present invention measures and stores a white luminance (LLO,WB to LL8,WB) for each of measuring points 0 to 8 (P0 to P8) of the left-eye image (L) incident via the left lens 310 at the respective positions corresponding to the measuring points 0 to 8 (P0 to P8). At this time, the left-eye image (L) on the 3D display 200 is displayed as the full screen white image (W), and the right-eye image (R) on the 3D display 200 is displayed as the full screen black image (B).

[00107] The light measuring device 400 according to the sixth embodiment of the present invention measures and stores a white luminance (LR0,wB to LR8WB) for each of measuring points 0 to 8 (P0 to P8) of the right-eye image (R) incident via the right lens 320 at the respective positions corresponding to the measuring points 0 to 8 (P0 to P8). At this time, the right-eye image (R) on the 3D display 200 is displayed as the full screen white image (W), and the left-eye image (L) on the 3D display 200 is displayed as the full screen black image (B).

1001081 In the meantime, the light measuring device 400 according to the sixth embodiment of the present invention calculates the average luminance (LLaV) of the left-eye image (L) and the average luminance (LR) of the right-eye image (R) based on the white luminance (LLO,w5 to LL8,WB) of the left-eye image (L) and the white luminance (LRO,wB to LR8,WH) of the right-eye image (R) for each of the measuring points 0 to 8 (P0 to P8) measured at the measuring points 0 to 8 (P0 to P8). At this time, the light measuring device 400 according to the sixth embodiment of the present invention may calculate the average luminance (LLaV) of the left-eye image (L) and the average luminance (LR) of the right-eye image (R), as shown in the above equation 2.

[001091 Furthermore, the light measuring device 400 according to the sixth embodiment of the present invention calculates the luminous non-uniformity (ALLI) of the left-eye image (L) for each measuring point based on the calculated average luminance (LL3V) of the left-eye image (L) and the white luminance (LLo,wB to LL8,WB) of the left-eye image (L) for each of the measuring points 0 to 8 (P0 to P8); and simultaneously calculates the luminous non-uniformity (ALRI) of the right-eye image (R) for each measuring point based on the calculated average luminance (LRay) of the right-eye image (R) and the white luminance (LRO,WB to LR8,WB) of the right-eye image (R) for each of the measuring points 0 to 8 (P0 to PS). At this time, the light measuring device 400 according to the sixth embodiment of the present invention may calculate the luminous non-uniformity (ALLI) of the left-eye image (L) and the luminous non-uniformity (ALRI) of the right-eye image (R), as shown in the above equation 3.

100110] Furthermore, the light measuring device 400 according to the sixth embodiment of the present invention may calculate the interocular luminance difference (ALav,LR) by the difference between the average luminance (LLaV) of the left-eye image (L) and the average luminance (LRaY) of the right-eye image (R).

[00111] In the measuring method according to the seventh embodiment of the present invention, if measuring the dark-room contrast ratio, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W) or full screen black image (B).

[00112] The light measuring device 400 according to the seventh embodiment of the present invention measures and stores a white luminance (LLO,ww) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[00113] Then, the light measuring device 400 according to the seventh embodiment of the present invention measures and stores a white luminance (LRO,ww) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display are displayed as the full screen white image (W).

[00114] Then, the light measuring device 400 according to the seventh embodiment of the present invention measures and stores a black luminance (LLO,BB) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen black image (B).

[00115] Then, the light measuring device 400 according to the seventh embodiment of the present invention measures and stores a black luminance (Lgo.BB) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display are displayed as the full screen black image (B).

[00116] In the meantime, the light measuring device 400 according to the seventh embodiment of the present invention calculates the dark-room contrast ratio (DRCRL) of the left-eye image (L) and the dark-room contrast ratio (DRCRR) of the right-eye image (R) based on the measured white luminance (LLO,WW) of the left-eye image (L), black luminance (LLO,Bn) of the left-eye image (L), white luminance (LRO,ww) of the right-eye image (R), and black luminance (LRO,BB) of the right-eye image (R). At this time, the light measuring device 400 according to the seventh embodiment of the present invention may calculate the dark-room contrast ratio (DRCRL) of the left-eye image (L) and the dark-room contrast ratio (DRCRR) of the right-eye image (R) by the following equation 4.

[Equation 4]

LLO WFV

DRCRL= LLO,BJJ

LRO WW

DRCRR

100117] Furthermore, the light measuring device 400 according to the seventh embodiment of the present invention may calculate the dark-room contrast ratio (DRCR) of the 3D display 200 based on an average value of dark-room contrast ratio (DRCRL) of the left-eye image (L) and the dark-room contrast ratio (DRCRR) of the right-eye image (R).

[001181 In the measuring method according to the eighth embodiment of the present invention, if measuring the colour gamut of the 3D display 200, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen red image (Red), full screen green image (Green), or full screen blue image (Blue). The left-eye image (L) and right-eye image (R) are generated based on CIE 1976 chromaticity coordinates.

[00119] The light measuring device 400 according to the eighth embodiment of the present invention measures and stores a red chromaticity coordinate value (CL(u'Red, vRed)) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the fUll screen red image (Red).

[00120] Then, the light measuring device 400 according to the eighth embodiment of the present invention measures and stores a green chromaticity coordinate value (Cju'orccn, v'oree,j) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen green image (Green) [00121] Then, the light measuring device 400 according to the eighth embodiment of the present invention measures and stores a blue chromaticity coordinate value (CL(u'aIue, vBiue)) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen blue image (Blue).

[00122] Then, the light measuring device 400 according to the eighth embodiment of the present invention measures and stores a red chromaticity coordinate value (CR(U'Red, vRd)) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen red image (Red).

[00123] Then, the light measuring device 400 according to the eighth embodiment of the present invention measures and stores a green chromaticity coordinate value (CR(u'cjreen, v'creen)) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen green image (Green).

[00124] Then, the light measuring device 400 according to the eighth embodiment of the present invention measures and stores a blue chromaticity coordinate value (CR(u'Blue, vBIue)) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen blue image (Blue).

[00125] In the meantime, the light measuring device 400 according to the eighth embodiment of the present invention calculates the colour gamut of the left-eye image (L) by linearly connecting the measured red, green, and blue chromaticity coordinates (CL(u'Red, VRd), CL(U'oreen, V'Grcen), CL(u'aIue, s/Blue)) of the left-eye image (L); and also calculates the colour gamut of the right-eye image (R) by linearly connecting the measured red, green, and blue chromaticity coordinates (CR(u'RCd, V Red), CR(u'cjreefl, v'oreen), CR(u'Blue, i/Blue)) of the right-eye image (R).

(00126] In the meantime, the light measuring device 400 according to the eighth embodiment of the present invention may use the chromaticity coordinates x, y of CIE 1931 chromaticity for the measurement. For example, the chromaticity coordinate ii', v' are transformed from the chroniaticity coordinate x, y, as shown in the following equation 5.

[Equation 51 4x 9y [001271 In the measuring method according to the ninth embodiment of the present invention, if measuring the white chromaticity and interocular luminance difference, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the ftill screen white image (W).

[00128] The light measuring device 400 according to the ninth embodiment of the present invention measures and stores chromaticity coordinates (CL(u'o, v'o)) of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W). Also, the measured chromaticity coordinates (CL(u'o, v'o)) of the left-eye image (L) may be formed by CIE 1976 UCS chromaticity coordinates.

[00129] Then, the light measuring device 400 according to the ninth embodiment of the present invention measures and stores chromaticity coordinates (CR(u'o, v'o)) of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W). Also, the measured chromaticity coordinates (CR(u'o, v'0)) of the right-eye image (R) may be formed by CIE 1976 UCS chromaticity coordinates.

[001301 In the meantime, the light measuring device 400 according to the ninth embodiment of the present invention calculates the white chromaticity (Ciju', v')) of the left-eye image (L) by the measured chromaticity coordinates (CL(u'o, v'o)) of the left-eye image (L); and also calculates the white chromaticity (CR(u', v')) of the right-eye image (R) by the measured chromaticity coordinates (CR(u'o, vo)) of the right-eye image (R). At this time, the light measuring device 400 according to the ninth embodiment of the present invention may use the chromaticity coordinates x, y of CIE 1931 chromaticity for the measurement. For example, the chromaticity coordinate u', V are transformed from the chromaticity coordinate x, y, as shown in the above equation 5.

[00131] Furthermore, the light measuring device 400 according to the ninth embodiment of the present invention may calculate the interocular chromatic difference (ALRu', &Rv) of the 3D display 200 based on the white chromaticity (CL(U', v')) of the left-eye image (L) and the white chromaticity (CR(u', v')) of the right-eye image (R). At this time, the light measuring device 400 according to the ninth embodiment of the present invention may calculate the interocular chromatic difference (LLRu, ALRv) by the following equation 6.

[Equation 61 A 1= P V

LILRU UJOURO

AIRV VjOVRO [00132] In the measuring method according to the tenth and eleventh embodiments of the present invention, if measuring the luminous non-uniformity of the 3D display 200, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

100133] The light measuring device 400 according to the tenth embodiment of the present invention measures and stores chromaticity coordinates (Cu(u'1, v'J, herein, i' is the measuring point from 0 to 4 for each of measuring points 0 to 4 (P0 to P4) of the left-eye image (L) incident via the left lens 310 at the respective positions corresponding to the measuring points 0 to 4 (P0 to P4). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[001341 Then, the light measuring device 400 according to the tenth embodiment of the present invention measures and stores chromaticity coordinates (CR(u'I, v'1),herein, i' is the measuring point from 0 to 4 for each of measuring points 0 to 4 (P0 to P4) of the right-eye image (R) incident via the right lens 320 at the respective positions corresponding to the measuring points 0 to 4 (P0 to P4). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[00135] In the meantime, the light measuring device 400 according to the tenth embodiment of the present invention calculates the chromatic non-uniformity (Au'u, Av'u) of the left-eye image (L) based on the measured chromaticity coordinates (CL(u'I, v'Q) of the left-eye image (L) for each of the measuring points 0 to 4 (P0 to P4); and also calculates the chromatic non-uniformity (Au'RI, avRI) of the right-eye image (R) based on the measured chromaticity coordinates (CR(U'I, v'1)) of the right-eye image (R) for each of the measuring points 0 to 4 (P0 to P4). At this time, the light measuring device 400 according to the tenth embodiment of the present invention may calculate the chromatic non-uniformity (au'LI, ESV'Lj) of the left-eye image (L) and the chromatic non-uniformity (Au'RI, Av'RI) of the right-eye image (R) by the following equation 7.

[00136] Meanwhile, the light measuring device 400 according to the tenth embodiment of the present invention may use the chromaticity coordinates x, y of CIE 1931 chromaticity for the measurement. For example, the chromaticity coordinate u', Y are transformed from the chromaticity coordinate x, y, as shown in the above equation 5.

[Equation 7] L\ it11 h111 U'10, L V'11 V'11 V'10 L\URAURIURo, L\VA1VRIa.VJ?O [00137] In above equation 7, Li' indicates the integer from 1 to 4; u'LI' and u'RI' indicate the u' value of the chromaticity coordinates (CL(u'I, v'Q) measured at the measuring point i'; and the V'Lj' and v'RI' indicate the v' value of the chromaticity coordinates (CL(u'I, v'j) measured at the measuring point i'.

[00138] The light measuring device 400 according to the eleventh embodiment of the present invention measures and stores chromaticity coordinates (CL(u'I, v'1), herein, i' is the measuring point from 0 to 8 for each of measuring points 0 to 8 (P0 to P8) of the left-eye image (L) incident via the left lens 310 at the respective positions corresponding to the measuring points 0 to 8 (P0 to P8). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[00139] Then, the light measuring device 400 according to the eleventh embodiment of the present invention measures and stores chromaticity coordinates (CR(u'I, v'1), herein, i' is the measuring point from 0 to 8 for each of measuring points 0 to 8 (P0 to P8) of the right-eye image (R) incident via the right lens 320 at the respective positions corresponding to the measuring points 0 to 8 (P0 to P8). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the full screen white image (W).

[00140] In the meantime, the light measuring device 400 according to the eleventh embodiment of the present invention calculates the chromatic non-uniformity (AutLj, AvLI) of the left-eye image (L) based on the measured chromaticity coordinates (CL(u'I, v')) of the left-eye image (L) for each of the measuring points 0 to 8 (P0 to P8); and also calculates the chromatic non-uniformity (Au'RI, Av'RI) of the right-eye image (R) based on the measured chromaticity coordinates (C(u', v'1)) of the right-eye image (R) for each of the measuring points 0 to 8 (P0 to P8). At this time, the light measuring device 400 according to the eleventh embodiment of the present invention may calculate the chromatic non-uniformity (Au'L1, Av'Lj) of the left-eye image (L) and the chromatic non-uniformity (Au'R, Av'g1) of the right-eye image (R) by the following equation 8.

[Equation 8] Aie'L,u'Ll'u'LO, Av'1v'11-v'0 L\URIURIURO Av'Rv'RIv'Ro 100141] In above equation 8, Li' indicates the integer from 1 to 8; u'jj' and u'RI indicate the u' value of the chromaticity coordinates (Cjju'1, v')) measured at the measuring point i'; and the v'L' and v'pj' indicate the V value of the chromaticity coordinates (CL(u', v'J) measured at the measuring point i'.

[00142] The light measuring device 400 according to the eleventh embodiment of the present invention may use the chromaticity coordinates x, y of CIE 1931 chromaticity for the measurement. For example, the chromaticity coordinate ii, v' are transformed from the chromaticity coordinate x, y, as shown in the above equation 5.

[00143] In the measuring method according to the twelfth embodiment of the present invention, if measuring the gamma value of the 3D display 200, any one of the left-eye image (L) and right-eye image (R) on the 3D display 200 is displayed as the full screen gray image (0) whose gray level is changed from a full screen black gray to a full screen white gray every predetermined number of frames, and the other is displayed as the full screen white image (W) or full screen black image (B).

[00144] The light measuring device 400 according to the twelfth embodiment of the present invention measures and stores a luminance (GLLO.ow) for each predetermined gray of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) on the 3D display 200 is displayed as the full screen gray image (0), and the right-eye image (R) on the 3D display is displayed as the full screen white image (W).

[00145] Then, the light measuring device 400 according to the twelfth embodiment of the present invention measures and stores a luminance (GLRO,GW) for each predetermined gray of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the right-eye image (R) on the 3D display 200 is displayed as the full screen gray image (0), and the left-eye image (L) on the 3D display is displayed as the full screen white image (W).

[00146] In the meantime, the light measuring device 400 according to the twelfth embodiment of the present invention calculates the gamma value (GVL) of the left-eye image (L) based on the measured luminance for each of the specified gray levels (GLLO,cw) in the left-eye image (L); and also calculates the gamma value (GVR) of the right-eye image (R) based on the measured luminance for each of the specified gray levels (GLRO,cjw) in the right-eye image (R).

[001471 The light measuring device 400 according to the thirteenth embodiment of the present invention measures and stores a luminance (GLLO,OB) for each predetermined gray of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) on the 3D display 200 is displayed as the full screen gray image (G), and the right-eye image (R) on the 3D display is displayed as the full screen black image (B).

[00148] Then, the light measuring device 400 according to the thirteenth embodiment of the present invention measures and stores a luminance (GLRo,cj) for each predetermined gray of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the right-eye image (R) on the 3D display 200 is displayed as the full screen gray image (G), and the left-eye image (L) on the 3D display 200 is displayed as the full screen black image (B).

100149] In the meantime, the light measuring device 400 according to the thirteenth embodiment of the present invention calculates the gamma value (GYL) of the left-eye image (L) based on the measured luminance for each of the specified gray levels (GLLO.GB) in the left-eye image (L); and also calculates the gamma value (GYR) of the right-eye image (R) based on the measured luminance for each of the specified gray levels (GL0,08) in the right-eye image (R).

[00150] The light measuring device 400 according to the fourteenth embodiment of the present invention measures and stores a luminance (GLLO,GG) for each predetermined gray of the left-eye image (L) incident via the left lens 310 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the same full screen gray image (G).

[00151] Then, the light measuring device 400 according to the fourteenth embodiment of the present invention measures and stores a luminance (GLRo,00) for each predetermined gray of the right-eye image (R) incident via the right lens 320 at the position corresponding to the measuring point 0 (P0). At this time, the left-eye image (L) and right-eye image (R) on the 3D display 200 are displayed as the same full screen gray image (G).

[00152] In the meantime, The light measuring device 400 according to the fourteenth embodiment of the present invention calculates the gamma value (GVL) of the left-eye image (L) based on the measured luminance for each of the specified gray levels (GLLQ,03) in the left-eye image (L); and also calculates the gamma value (GV) of the right-eye image (R) based on the measured luminance for each of the specified gray levels (GLRO,00) in the right-eye image (R).

[00153] A detailed method for calculating the gamma value by any one of the light measuring devices 400 according to the twelfth to fourteenth embodiment of the present invention will be described as follows.

[001541 First, the luminance curve (LC) based on the gray scale (V) is obtained by connecting the luminance for each of the specified gray scales (GL) in the left-eye image (L), as shown in FIG. SA.

[00155] Then, a log gray scale value (Log(V)) is calculated by logging each gray scale value.

[00156] Then, the black luminance (GL0) is subtracted from the calculated luminance for each of the specified gray scales (GL), to thereby calculate the luminance difference for each gray scale (GL-GL0). Also, the log luminance value (Log(GL-GL0)) is calculated by logging the luminance difference for each gray scales (OL-GL0).

[00157] As shown in FIG. 8B, the gamma curve (GC) is obtained by the calculated log gray scale value (Log(V)) and log luminance value (Log(GL-GL0)).

[00158] The gamma value of the gamma curve (OC) is calculated with an inclination of regression equation based on a regression analysis for the obtained gamma curve (GC).

100159] Eventually, any one of the light measuring devices 400 according to the twelfth to fourteenth embodiment of the present invention calculates the gamma value (GVL) of the left-eye image (L) and the gamma value (GVR) of the right-eye image (R) by the aforementioned method of measuring the gamma value.

[00160] The optical measuring apparatus and method of stereoscopic display device according to the embodiments of the present invention displays the left-eye image (L) andlor right-eye image (R) on the 3D display 200; and measures the intensity or color information of the left-eye image (L) or right-eye image (R) via the image selection member (or polarizer glasses) 300 by selectively transmitting the left-eye image (L) or right-eye image (R) through the 3D display 200, which enables the objective measurement for the optical characteristics of the 3D display 200.

[00161] It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (55)

1. CLAIMS: 1. An optical measuring apparatus of a stereoscopic display device comprising: a test image supplier for generating a 3D test signal; a 3D display for displaying a left-eye image and/or right-eye image based on the 3D test signal supplied from the test image supplier; an image selection member for selectively transmitting the left-eye image and right-eye image to be displayed on the 3D display; and a light measuring device for measuring intensity or color information of the image transmitted via the image selection member.
2. 2. An apparatus according to claim 1, wherein the image selection member is provided at an interval of at least 10 m from the light measuring device, the optical measuring apparatus is installed inside a dark room maintained at 1 Lux or less, and a measuring distance between the light measuring device and the 3D display is above 2 meters, or 3L, wherein, L' is a height, width, or diagonal length of screen of the 3D display.
3. 3. An apparatus according to claim I or 2, wherein the light measuring device is for generating optical characteristic information of the 3D display according to the measured intensity or color information of the image.
4. 4. An apparatus according to claim 3, wherein the optical characteristic information includes at least one of luminance, average luminance, interocular luminance difference, luminous non-uniformity, dark-room contrast ratio, white chromaticity, colour gamut, interocular chromatic difference, chromatic non-uniformity, and gamma values for the left-eye image and right-eye image.
5. 5. An apparatus according to any preceding claim, wherein the light measuring device is movably provided while being parallel to each of plural measuring points on a screen of the 3D display, and wherein the plural measuring points include: a center measuring point which is set to be positioned in the center of the screen of the 3D display; first to fourth measuring points which are set to be positioned at the respective corners of the screen of the 3D display; and fifth to eighth measuring points which are set to be positioned between two neighboring measuring points of first to fourth measuring points.
6. 6. An apparatus according to any preceding claim, wherein the 3D display is for displaying the left-eye image and/or right-eye image which are temporally or spatially divided.
7. 7. An apparatus according to any preceding claim, wherein the image selection member comprises: a left lens for selecting only the left-eye image displayed on the 3D display; and a right lens for selecting only the right-eye image displayed on the 3D display.
8. 8. An apparatus according to claim 7, wherein the light measuring device includes an object lens which is smaller than the size of the left lens and right lens.
9. 9. An apparatus according to claim 7 or 8, wherein any one of the left-eye image and right-eye image is displayed as a full screen white image, and the other is displayed as a full screen white image or full screen black image.
10. 10. An apparatus according to claim 9, wherein the light measuring device is for measuring the luminance of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and is for measuring the luminance of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point.
11. 11. An apparatus according to claim 9 or 10, wherein the light measuring device is for measuring a white luminance for each of the specified measuring points of the left-eye image corresponding to the full screen white image incident via the left lens at the respective positions corresponding to the center measuring point and first to fourth measuring points or the center measuring point and first to eighth measuring points; and wherein the light measuring device is for measuring a white luminance for each of the specified measuring points of the right-eye image corresponding to the full screen white image incident via the right lens at the respective positions corresponding to the center measuring point and first to fourth measuring points or the center measuring point and first to eighth measuring points.
12. 12. An apparatus according to claim 11, wherein the light measuring device is for calculating the average luminance of the left-eye image by averaging the white luminance for each of the specific measuring points of the left-eye image; and wherein the light measuring device is for calculating the average luminance of the right-eye image by averaging the white luminance for each of the specific measuring points of the right-eye image.
13. 13. An apparatus according to claim 12, wherein the light measuring device is for calculating the interocular luminance difference corresponding to the difference between the average luminance of the left-eye image and the average luminance of the right-eye image.
14. 14. An apparatus according to claim 12, wherein the light measuring device is for calculating the luminous non-uniformity for each of the specified measuring points of the left-eye image by subtracting the average luminance of the left-eye image from the white luminance for each of the specified measuring points of the left-eye image; and wherein the light measuring device is for calculating the luminous non-uniformity for each of the specified measuring points of the right-eye image by subtracting the average luminance of the right-eye image from the white luminance for each of the specified measuring points of the right-eye image.
15. 15. An apparatus according to claim 7, wherein both the left-eye image and right-eye image are the full screen white images, or both the left-eye image and right-eye image are the full screen black images; wherein the light measuring device is for measuring a white luminance of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and a white luminance of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point; and wherein the light measuring device is for measuring a black luminance of the left-eye image corresponding to the full screen black image incident via the left lens at the center measuring point, and a black luminance of the right-eye image corresponding to the full screen black image incident via the right lens at the center measuring point.
16. 16. An apparatus according to claim 15, wherein the light measuring device is for calculating the dark-room contrast ratio of the left-eye image by dividing the black luminance of the left-eye image into the white luminance of the left-eye image, and the dark-room contrast ratio of the right-eye image by dividing the black luminance of the right-eye image into the white luminance of the right-eye image; and wherein the dark-room contrast ratio of the 3D display is calculated by averaging the dark-room contrast ratio of the left-eye image and the dark-room contrast ratio of the right-eye image.
17. 17. An apparatus according to claim 7, wherein the respective left-eye image and right-eye image are the same full screen red images, full screen green images, and full screen blue images; wherein the light measuring device is for measuring the color information of the left-eye image incident via the left lens at the center measuring point, and is for measuring the color information of the right-eye image incident via the right lens at the center measuring point; and wherein the color information of the left-eye image and right-eye image is the chromaticity coordinates of the full screen red images, frill screen green images, and full screen blue images.
18. 18. An apparatus according to claim 17, wherein the light measuring device is for calculating the colour gamut of the left-eye image based on the color information of the left-eye image, and is for calculating the colour gamut of the right-eye image based on the color information of the right-eye image.
19. 19. An apparatus according to claim 7, wherein both the left eye image and right eye image are the full screen white images; and wherein the light measuring device is for measuring the chromaticity coordinates of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and is for measuring the chromaticity coordinates of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point.
20. 20. An apparatus according to claim 19, wherein the light measuring device is for calculating the white chromaticity of the left-eye image corresponding to the chromaticity coordinates of the left-eye image, and is for calculating the white chromaticity of the right-eye image corresponding to the chromaticity coordinates of the right-eye image.
21. 21. An apparatus according to claim 20, wherein the light measuring device is for calculating the interocular chromatic difference by subtracting the white chromaticity of the right-eye image from the white chromaticity of the left-eye image.
22. 22. An apparatus according to claim 7, wherein both the left eye image and right eye image are the full screen white images; wherein the light measuring device is for measuring the chromaticity coordinates for each of the specified measuring points of the left-eye image incident via the left lens at the respective positions corresponding to the center measuring point and first to eighth measuring points; and wherein the light measuring device is for measuring the chromaticity coordinates for each of the specified measuring points of the right-eye image incident via the right lens at the respective positions corresponding to the center measuring point and first to eighth measuring points.
23. 23. An apparatus according to claim 22, wherein the light measuring device is for calculating the white chromaticity for each of the specified measuring points of the left-eye image based on the chromaticity coordinates for each of the specified measuring points of the left-eye image, and is for calculating the white chromaticity for each of the specified measuring points of the right-eye image based on the chromaticity coordinates for each of the specified measuring points of the right-eye image.
24. 24. An apparatus according to claim 23, wherein the light measuring device is for calculating the chromatic non-uniformity for each of the first to eighth measuring points of the left-eye image by subtracting the white chromaticity of the center measuring point from the white chromaticity for each of the first to eighth measuring points of the left-eye image; and wherein the light measuring device is for calculating the chromatic non-uniformity for each of the first to eighth measuring points of the right-eye image by subtracting the white chromaticity of the center measuring point from the white chromaticity for each of the first to eighth measuring points of the right-eye image
25. 25. An apparatus according to claim 7, wherein any one of the left-eye image and right-eye image is displayed as a full screen gray image whose gray scale is changed from a full screen black gray scale to a full screen white gray scale every predetermined number of frames; and the other is the full screen white image, full screen black image, or full screen gray scale image.
26. 26. An apparatus according to claim 25, wherein the light measuring device is for measuring the luminance for each gray scale of the left-eye image incident via the left lens at the center measuring point, and is for measuring the luminance for each gray scale of the right-eye image incident via the right lens at the center measuring point.
27. 27. An apparatus according to claim 26, wherein the light measuring device is for calculating the gamma value of the left-eye image based on the luminance for each of the gray scales of the left-eye image, and is for calculating the gamma value of the right-eye image based on the luminance for each of the gray scales of the right-eye image.
28. 28. An optical measuring method of a stereoscopic display device comprising: generating a 3D test signal; displaying a left-eye image and/or right-eye image based on the 3D test signal on a 3D display; transmitting the left-eye image or right-eye image to be displayed on the 3D display through the use of an image selection member; and measuring intensity or color information of the left-eye image or right-eye image transmitted via the image selection member through the use of a light measuring device.
29. 29. A method according to claim 28, wherein the image selection member is provided at an interval of at least 10 mm from the light measuring device, the optical measuring method is carried out inside a dark room maintained at 1 Lux or less, and a measuring distance between the light measuring device and the 3D display is above 2 meters, or 3L, wherein, L' is a height, width, or diagonal length of screen of the 3D display.
30. 30. A method according to claim 28 or 29, further comprising generating optical characteristic information of the 3D display according to the measured intensity or color information of the image through the use of the light measuring device.
31. 31. A method according to claim 30, wherein the optical characteristic information includes at least one of luminance, average luminance, interocular luminance difference, luminous non-uniformity, dark-room contrast ratio, white chromaticity, colour gamut, interocular chromatic difference, chromatic non-uniformity, and gamma values for the left-eye image and right-eye image.
32. 32. A method according to any one of claims 28 to 31, wherein the light measuring device is movably provided while being parallel to each of plural measuring points on a screen of the 3D display, and wherein the plural measuring points include: a center measuring point which is set to be positioned in the center of the screen of the 3D display; first to fourth measuring points which are set to be positioned at the respective corners of the screen of the 3D display; and fifth to eighth measuring points which are set to be positioned between two neighboring measuring points of first to fourth measuring points.
33. 33. A method according to any one of claims 28 to 32, wherein the 3D display displays the left-eye image and/or right-eye image which are temporally or spatially divided.
34. 34. A method according to any one of claims 28 to 33, wherein the image selection member comprises: a left lens for selecting only the left-eye image displayed on the 3D display; and a right lens for selecting only the right-eye image displayed on the 3D display.
35. 35. A method according to claim 34, wherein any one of the left-eye image and right-eye image is displayed as a full screen white image, and the other is displayed as a full screen white image or full screen black image.
36. 36. A method according to claim 35, wherein the light measuring device measures the luminance of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and measures the luminance of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point.
37. 37. A method according to claim 35 or 36, wherein the light measuring device measures a white luminance for each of the specified measuring points of the left-eye image corresponding to the full screen white image incident via the left lens at the respective positions corresponding to the center measuring point and first to fourth measuring points or the center measuring point and first to eighth measuring points; and wherein the light measuring device measures a white luminance for each of the specified measuring points of the right-eye image corresponding to the full screen white image incident via the right lens at the respective positions corresponding to the center measuring point and first to fourth measuring points or the center measuring point and first to eighth measuring points.
38. 38. A method according to claim 37, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the average luminance of the left-eye image by averaging the white luminance for each of the specific measuring points of the left-eye image; and calculating the average luminance of the right-eye image by averaging the white luminance for each of the specific measuring points of the right-eye image.
39. 39. A method according to claim 38, wherein the process of generating the optical characteristic information of the 3D display further comprises: calculating the interocular luminance difference corresponding to the difference between the average luminance of the left-eye image and the average luminance of the right-eye image.
40. 40. A method according to claim 38 or 39, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the luminous non-uniformity for each of the specified measuring points of the left-eye image by subtracting the average luminance of the left-eye image from the white luminance for each of the specified measuring points of the left-eye image; and calculating the luminous non-uniformity for each of the specified measuring points of the right-eye image by subtracting the average luminance of the right-eye image from the white luminance for each of the specified measuring points of the right-eye image.
41. 41. A method according to claim 34, wherein both the left-eye image and right-eye image are the full screen white images, or both the left-eye image and right-eye image are the full screen black images; wherein the light measuring device measures a white luminance of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and a white luminance of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point; and wherein the light measuring device measures a black luminance of the left-eye image corresponding to the full screen black image incident via the left lens at the center measuring point, and a black luminance of the right-eye image corresponding to the full screen black image incident via the right lens at the center measuring point.
42. 42. A method according to claim 41, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the dark-room contrast ratio of the left-eye image by dividing the black luminance of the left-eye image into the white luminance of the left-eye image; calculating the dark-room contrast ratio of the right-eye image by dividing the black luminance of the right-eye image into the white luminance of the right-eye image; and calculating the dark-room contrast ratio of the 3D display by averaging the dark-room contrast ratio of the left-eye image and the dark-room contrast ratio of the right-eye image.
43. 43. A method according to claim 34, wherein the respective left-eye image and right-eye image are the same full screen red images, full screen green images, and lull screen blue images; wherein the light measuring device measures the color information of the left-eye image incident via the left lens at the center measuring point, and measures the color information of the right-eye image incident via the right lens at the center measuring point; and wherein the color information of the left-eye image and right-eye image is the chromaticity coordinates of the full screen red images, full screen green images, and full screen blue images.
44. 44. A method according to claim 43, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the colour gamut of the left-eye image based on the color information of the left-eye image; and calculating the colour gamut of the right-eye image based on the color information of the right-eye image.
45. 45. A method according to claim 34, wherein both the left-eye image and right-eye image are the full screen white images; and wherein the light measuring device measures the chromaticity coordinates of the left-eye image corresponding to the full screen white image incident via the left lens at the center measuring point, and measures the chromaticity coordinates of the right-eye image corresponding to the full screen white image incident via the right lens at the center measuring point.
46. 46. A method according to claim 45, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the white chromaticity of the left-eye image corresponding to the chromaticity coordinates of the left-eye image; and calculating the white chromaticity of the right-eye image corresponding to the chromaticity coordinates of the right-eye image.
47. 47. A method according to claim 46, wherein the process of generating the optical characteristic information of the 3D display further comprises: calculating the interocular chromatic difference by subtracting the white chromaticity of the right-eye image from the white chromaticity of the left-eye image.
48. 48. A method according to claim 34, wherein both the left-eye image and right-eye image are the full screen white images; wherein the light measuring device measures the chromaticity coordinates for each of the specified measuring points of the left-eye image incident via the left lens at the respective positions corresponding to the center measuring point and first to eighth measuring points; and wherein the light measuring device measures the chromaticity coordinates for each of the specified measuring points of the right-eye image incident via the right lens at the respective positions corresponding to the center measuring point and first to eighth measuring points.
49. 49. A method according to claim 48, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the white chromaticity for each of the specified measuring points of the left-eye image based on the chromaticity coordinates for each of the specified measuring points of the left-eye image; arid calculating the white chromaticity for each of the specified measuring points of the right-eye image based on the chromaticity coordinates for each of the specified measuring points of the right-eye image.
50. 50. A method according to claim 49, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the chromatic non-uniformity for each of the first to eighth measuring points of the left-eye image by subtracting the white chromaticity of the center measuring point from the white chromaticity for each of the first to eighth measuring points of the left-eye image; and calculating the chromatic non-uniformity for each of the first to eighth measuring points of the right-eye image by subtracting the white chromaticity of the center measuring point from the white chromaticity for each of the first to eighth measuring points of the right-eye image.
51. 51. A method according to claim 34, wherein any one of the left-eye image and right-eye image is displayed as a full screen gray image whose gray scale is changed from a full screen black gray scale to a full screen white gray scale every predetermined number of frames; and the other is the full screen white image, full screen black image, or full screen gray scale image.
52. 52. A method according to claim 51, wherein the light measuring device measures the luminance for each gray scale of the left-eye image incident via the left lens at the center measuring point, and measures the luminance for each gray scale of the right-eye image incident via the right lens at the center measuring point.
53. 53. A method according to claim 52, wherein the process of generating the optical characteristic information of the 3D display comprises: calculating the gamma value of the left-eye image based on the luminance for each of the gray scales of the left-eye image; and calculating the gamma value of the right-eye image based on the luminance for each of the gray scales of the right-eye image.
54. 54. An optical measuring apparatus of a stereoscopic display device, substantially as hereinbefore described with reference to any of the accompanying drawings.
55. 55. An optical measuring method of a stereoscopic display device, substantially as hereinbefore described with reference to any of the accompanying drawings.