JP2009270947A - Display inspection apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display inspection apparatus and method for identifying a dark spot and dust of an FPD(Flat Panel Display). <P>SOLUTION: This display inspection apparatus includes a first imaging section (control section 13) for imaging display with an imaging section 11, a second imaging section (control section 13) for imaging the display with the imaging section 11 while the photosensitive surface of the imaging section is moved in the direction opposite to the moving direction, and a determining section (control section 13) for determining whether the type of a color filter adjacent to a point defect in the image imaged by the second imaging section is different from that of a color filter adjacent to a point defect in the image imaged by the first imaging section. The display inspection apparatus also includes a discriminating section (control section 13) for determining the point defect of the display to be caused by a foreign substance when it is determined that the type of the color filter adjacent to the point defect in the image imaged by the second imaging section is different from that of the color filter adjacent to the point defect in the image imaged by the first imaging section. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for inspecting a flat panel display.

  When a flat panel display (hereinafter referred to as FPD) is incorporated into a small device such as a mobile phone, a transparent cover made of glass or plastic is generally provided on the FPD. In addition, there is a case where the transparent cover is provided while dust is present between the transparent cover and the FPD, and it is difficult to remove the dust. In addition, in the FPD, there are pixels (dots) that do not light with a high probability, and such pixels are called dark spots. Hereinafter, the structure of a liquid crystal display as an example of the FPD described above, and dust and dark spots in the liquid crystal display will be specifically described. FIG. 12 is a diagram showing a liquid crystal display in which dust and dark spots exist.

  As shown in FIG. 12, the liquid crystal display 9 includes glass plates 92a and 92b, a color filter 93, a liquid crystal 94, and a backlight 95. A transparent cover 91 is provided on the glass plate 92a of the liquid crystal display. The backlight 95 emits light to the liquid crystal 94. In addition, the liquid crystal 94 changes the light transmittance of the backlight 95 in units of color filters based on the voltage. The color filter 93 is a filter in which R (Red) G (Green) B (Blue) light is transmitted to one pixel. The glass plates 92a and 92b are highly transparent members provided so as to sandwich the color filter 93 and the liquid crystal 94 therebetween. The liquid crystal display 9 expresses the color of one pixel by additive color mixing by changing the transmittance of each of RGB light to the liquid crystal 94.

  Such a liquid crystal display 9 has many dark spots. For example, in the liquid crystal display 9 shown in FIG. 12, a dark spot exists in the liquid crystal 94 corresponding to the R color filter 93, and a pixel having such a dark spot cannot normally express a color. Also, as shown in FIG. 12, dust may adhere on the transparent cover 91, but it is not a problem because it is easy to remove such dust. However, as described above, in the process of incorporating the liquid crystal display 9 in the device, when dust is caught between the transparent cover 91 and the glass plate 92a as shown in FIG. It is difficult.

  The above-mentioned dark spot and dust (hereinafter referred to as dust) sandwiched may be handled differently in the FPD inspection. For example, if the number or size of dust is less than the screening standards set for dust, the FPD is a non-defective product, and if the number or size of dark spots is below the screening standards set for dark spots, the FPD May be considered a non-defective product. In such a case, since each examination standard is different, it is necessary to distinguish between a dark spot and dust in the FPD.

In addition, as a technique for discriminating between dark spots and dust in the FPD as described above, a technique is known in which the brightness of each element of the FPD is measured by a line sensor and a foreign object is inspected using a line sensor having a different focal position. (For example, refer to Patent Document 1).
JP 2001-124660 A

  However, the distinction between dark spots and dust based on the difference in focal position means that the optical system has a high optical magnification (that is, an optical with a shallow depth of field) so that blurring occurs due to a difference in thickness (1 mm or less) of the glass plate. System). For this reason, the technique of Patent Document 1 has a problem that the entire surface of the FPD cannot be imaged at one time, and it takes time to determine the inspection.

  The present invention has been made to solve the above-described problems, and provides a display inspection apparatus and method that can identify dark spots and dust on an FPD using an optical system having a lower optical magnification. The purpose is that.

  In order to solve the above-described problem, a display inspection apparatus is an apparatus for inspecting a display in which a plurality of color filters of different primary colors in a mixed color are arranged in a pixel, the camera including a photosensitive surface and an optical system, and the display A first image pickup unit that picks up images with the camera, a first determination unit that determines whether the display has a dot, based on a first picked-up image that is an image picked up by the first image pickup unit, When the first determination unit determines that the display has a dot, the display is moved in the arrangement direction of the color filters in the pixels, and the photosensitive surface of the camera is moved in the direction opposite to the movement direction of the display. A moving unit that moves; and the display is moved by the moving unit, and the photosensitive surface is in a direction opposite to the moving direction of the display. In a moved state, a second imaging unit that images the display by the camera, a color filter adjacent to a dot in the second captured image that is an image captured by the second imaging unit, and the first imaging A second determination unit configured to determine whether or not the type of a dot in the image is different from a color filter adjacent thereto; a color filter adjacent to the point in the second captured image by the second determination unit; and the first imaging When it is determined that the type of the dot in the image is different from the type of the adjacent color filter, the determination unit includes the point of the display as a point due to a foreign object.

  The display inspection method is a method in which a display in which a plurality of color filters of different primary colors in a mixed color are arranged in pixels is imaged by a camera including a photosensitive surface and an optical system, and the display is imaged by the camera. One imaging step, a first determination step for determining whether or not there is a dot on the display based on a first captured image that is an image captured by the first imaging step, and the first determination step When it is determined that the display has a dot, the moving step of moving the display in the arrangement direction of the color filter in the pixel and moving the photosensitive surface of the camera in the direction opposite to the moving direction of the display; The display is moved by the moving step, and the photosensitive surface is moved by the display. A second imaging step in which the display is imaged by the camera in a state where the camera is moved in a direction opposite to the direction; and a color filter adjacent to a dot in the second captured image that is an image captured by the second imaging step. And a second determination step for determining whether or not the type of the dot in the first captured image is different from the type of the color filter adjacent to the point, and the color filter adjacent to the point in the second captured image by the second determination step. And a step of determining, when it is determined that the type of the dot in the first captured image is different from the type of the adjacent color filter, the point of the display is set as a point due to a foreign object.

  According to the present invention, it is possible to identify a dark spot and dust on the FPD using an optical system having a lower optical magnification.

  The present invention discriminates dark spots and dust (foreign matter) as shown in FIG. 12 by imaging FPDs from different angles. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the configuration of the display inspection apparatus according to the present embodiment will be described. FIG. 1 is a diagram showing a configuration of a display inspection apparatus according to the present embodiment. FIG. 2 is a diagram showing a mobile phone as an inspection target. Moreover, FIG. 3 is a figure which shows the example which images a display with dust from a different viewing angle. FIG. 4 is a diagram illustrating an example of imaging a display with a dark spot at different viewing angles. In the present embodiment, the dark spot is a dot missing below a predetermined luminance on the display.

  The display inspection apparatus 1 according to the present embodiment includes an imaging unit 11 (camera), an inspection target moving unit 12 (moving unit), an imaging unit 11 and a control unit 13 that controls the inspection target moving unit 12 (first imaging unit, A second imaging unit, a first determination unit, a second determination unit, a third determination unit, a fourth determination unit, a determination unit, a foreign matter determination unit, a dark spot determination unit, and a luminance setting unit). The imaging unit 11 includes a CCD moving unit 111 (moving unit), a CCD 112 (photosensitive surface, camera), and a lens 113 (optical system, camera). In addition, the mobile phone 2 is mounted on the inspection object moving unit 12 as an inspection object.

  The CCD 112 is an imaging element provided as a photosensitive surface of the imaging unit 11. The CCD 112 preferably has 9 or more pixels as many as the number of pixels of the display 21 of the cellular phone 2 described later. The CCD moving unit 111 moves the CCD 112 in a predetermined direction parallel to the inspection target moving unit 12 (perpendicular to the optical axis of the lens 113). The lens 113 is an optical system having an optical magnification of 1 ×, but may be an optical system having an optical magnification of 1 × or less.

  The inspection object moving unit 12 moves the mobile phone 2 mounted in a direction opposite to the direction in which the CCD moving unit 111 moves the CCD 112 in parallel (perpendicular to the optical axis of the lens 113). is there.

  The mobile phone 2 includes a display 21 as shown in FIG. In the present embodiment, the display 21 is a liquid crystal display having the same configuration as the liquid crystal display 9 shown in FIG. The display 21 has RGB color filters arranged in one pixel, and the inspection object moving unit 12 moves the mobile phone 2 in the arrangement direction of the color filters. The display 21 may be a flat panel display in which a plurality of primary colors in a mixed color such as LED, EL, VFD, and PDP are arranged in a pixel as a color filter.

  With the above-described configuration, the display inspection apparatus 1 according to the present embodiment moves the CCD 112 from i1 to i2 and moves the mobile phone 2 from p1 to p2, thereby displaying the display 21 at different viewing angles (a1 or a2). Image. By imaging the display from different viewing angles, it is possible to determine black spots (dots) that are unknown whether dust or dark spots. For example, as shown in FIG. 3, when the black spot is dust, the light of the R color filter under the dust reaches the CCD 112 by changing the viewing angle. Also, as shown in FIG. 4, when the black dot is a dark spot, the R color filter above the dark spot of the liquid crystal does not emit light, so the light of the R color filter does not reach the CCD 112 even if the viewing angle is changed. Absent.

  Here, the viewing angle to be changed will be described. The difference between a1 and a2 is a3, the thickness of the glass plate on the color filter of the display 21 (that is, the distance from the color filter to dust) is d, and the width of the color filter in the arrangement direction is e. In this case, the expression a3 = tan (d / e) is established.

  Further, the distance between the CCD 112 and the lens 113 and the ratio between the lens 113 and the display 21 are 1: 1. This ratio is due to the optical magnification of the lens 113. When the optical magnification of the lens 113 is A, the distance between the CCD 112 and the lens 113 is B, and the distance between the lens 113 and the display 21 is C, C = B / A. For example, when the optical magnification of the lens 113 is 0.5, the ratio of B and C is 1: 2.

  Next, the operation of the display inspection apparatus according to the present embodiment will be described. FIG. 5 is a flowchart showing the operation of the display inspection apparatus according to the present embodiment. In the initial state, the position of the imaging unit is i1, and the position of the mobile phone is p1. In FIG. 5, it is assumed that the control unit 13 sets the display 21 of the mobile phone 2 to a predetermined luminance.

  First, the control unit 13 causes the imaging unit 11 to image the display 21 of the mobile phone 2 (S101, first imaging step), and black spots on the display 21 are obtained by image processing based on the captured image (first captured image). A detection process (black spot detection) is executed (S102, first determination step), and it is determined whether there is a black spot on the display 21 (S103, second determination step).

  When there is a black spot on the display 21 (S103, YES), the control unit 13 causes the CCD moving unit 111 to move the CCD 112 to i2, and causes the inspection target moving unit 12 to move the mobile phone 2 to p2 (S104, YES). Moving step). The moving distance of the CCD 112 is not less than the width in the color filter array direction, and the moving distance of the mobile phone 2 (display 21) is not less than the product of the width in the array direction of the color filter and the optical magnification of the lens 113. Note that these movement distances are preferably such that they are shifted by one color filter on the captured image.

  Next, the control unit 13 causes the imaging unit 11 to image the display 21 again (S105, second imaging step), and detects a black spot on the display 21 by image processing based on the captured image (second captured image). Processing (black spot detection) is executed (S106), and the position of the black spot on the captured image detected in step S102 is compared (S107, second determination step). Here, the control unit 13 determines whether there is a position change in the captured image in the comparison of the positions of the black spots (S108, second determination step). A specific method for comparing the positions of black spots will be described later.

  In the comparison of the positions of the black spots, if it is determined that there is a position change in the captured image, that is, if the black spots are caused by dust (S108, YES, determination step), a foreign substance inspection process described later is executed (S109, Judgment step).

  Here, the change of the position in the picked-up image of a black spot is demonstrated using FIG.6 and FIG.7. FIG. 6 is a diagram illustrating the position of the black spot in the captured image before moving the imaging position. FIG. 7 is a diagram illustrating the position of the black spot in the captured image after the imaging position is moved. FIG. 8 is a diagram showing the luminance of the color filter. FIG. 9 is a diagram illustrating color filters with different brightness in the captured image.

  As shown in FIG. 6, the position of the black spot in the captured image before moving the imaging position is on the R color filter. In addition, as shown in FIG. 7, the position of the black spot in the captured image after moving the imaging position captured at different viewing angles is on the B color filter. The control unit 13 determines whether there is a change in the position of the black spot on the captured image by comparing the color of the color filter around the black spot in the captured image. Note that the control unit 13 may determine whether there has been a change in the position of the dust on the captured image by measuring the distance from the specific color filter in the captured image using the specific color filter as a reference. .

  When a monochrome camera is used as the imaging unit 11, the control unit 13 sets the liquid crystals corresponding to the RGB color filters to different luminances as shown in FIG. 8 (luminance setting step). As a result, as shown in FIG. 9, the RGB color filters in the grayscale captured image have different brightness, and the control unit 13 can compare the colors of the color filters around the black spots. In general, a color camera requires 3 × 3 pixels or more for one element as compared with a monochrome camera. Therefore, by using a monochrome camera as the imaging unit 11, the number of effective pixels is increased as compared with the case of using a color camera having the same number of elements, and a captured image with higher resolution can be obtained.

  Further, in step S108 in FIG. 5, when it is determined in the comparison of the positions of the black spots that there is no position change in the captured image, that is, when the black spots are due to the dark spots (S108, NO, determination step), control is performed. The unit 13 executes a dark spot inspection process to be described later (S110, determination step).

  In step S103, when there is no black spot on the display 21 (S103, NO), the control unit 13 ends the process.

  As described above, when there is a black spot on the display 21, the display inspection apparatus 1 according to the present embodiment determines whether or not there is a change in the type of color filter around the black spot in an image captured at a different viewing angle. By determining, it is possible to determine whether the black spot on the display 21 is dust or a dark spot.

  Next, the operation of the foreign substance inspection process will be described. This foreign matter inspection process corresponds to step S109 in FIG. FIG. 10 is a flowchart showing the operation of the foreign substance inspection process. The inspection standard in FIG. 10 is a predetermined standard.

  First, the control unit 13 obtains the size and number of dusts and the interval between these dusts (hereinafter collectively referred to as dust amount) from the captured image (S201), and the dust amount is below the inspection standard. Is determined (S202).

  When the amount of dust is less than or equal to the inspection standard (S202, YES), the control unit 13 sets the display 21 as a non-defective product (S203).

  On the other hand, when the amount of dust is larger than the inspection standard (S202, NO), the control unit 13 sets the display 21 as a foreign object defective product (S204, foreign object determination unit).

  Next, the operation of the dark spot inspection process will be described. This dark spot inspection process corresponds to step S110 in FIG. FIG. 11 is a flowchart showing the operation of the dark spot inspection process. The inspection standard in FIG. 11 is a predetermined standard.

  First, the control unit 13 obtains the size and number of dark spots and the interval between these dark spots (hereinafter collectively referred to as the dark spot amount) from the captured image (S301), and the dark spot amount. Is less than or equal to the inspection standard (S302).

  When the amount of dark spots is equal to or less than the inspection standard (S302, YES), the control unit 13 sets the display 21 as a non-defective product (S303).

  On the other hand, when the amount of dark spots is larger than the inspection standard (S302, NO), the control unit 13 sets the display 21 as a defective product (S304, dark spot determination unit).

  According to the foreign substance inspection process and the dark spot inspection process described above, the display inspection apparatus 1 according to the present embodiment uses the display 21 as a foreign object defective when the amount of dust is larger than a predetermined inspection standard, and the predetermined inspection standard. When the amount of dark spots is large, the display 21 can be a defective dark spot product. As a result, the display inspection apparatus 1 according to the present embodiment can distinguish the display 21 as a defective product having a black spot equal to or higher than a predetermined inspection standard into a dust display and a dark spot display.

  The present invention can be implemented in various other forms without departing from the gist or main features thereof. Therefore, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is shown by the scope of claims, and is not restricted by the text of the specification. Further, all modifications, various improvements, alternatives and modifications belonging to the equivalent scope of the claims are all within the scope of the present invention.

As mentioned above, according to this Embodiment, the technical idea shown with the following additional remarks is disclosed.
(Supplementary note 1) A display inspection apparatus for inspecting a display in which a plurality of color filters of different primary colors in a mixed color are arranged in a pixel,
A camera composed of a photosensitive surface and an optical system;
A first imaging unit that images the display with the camera;
A first determination unit that determines whether or not the display has a dot, based on a first captured image that is an image captured by the first imaging unit;
When the first determination unit determines that the display has a dot, the display is moved in the arrangement direction of the color filters in the pixels, and the photosensitive surface of the camera is moved in the direction opposite to the movement direction of the display. A moving part to move;
A second imaging unit that images the display by the camera in a state where the display is moved by the moving unit and the photosensitive surface is moved in a direction opposite to the moving direction of the display;
Determining whether the color filter adjacent to the dot in the second captured image, which is an image captured by the second imaging unit, and the color filter adjacent to the dot in the first captured image are different; 2 determination units;
If the second determination unit determines that the color filter adjacent to the dot in the second captured image is different from the color filter adjacent to the dot in the first captured image, the dot filter of the display A display inspection apparatus comprising: a determination unit that uses a foreign object as a point defect.
(Supplementary note 2) In the display inspection apparatus according to supplementary note 1,
When the second determination unit determines that the color filter adjacent to the dot in the second captured image and the color filter adjacent to the dot in the first captured image are not different, the determination unit A display inspection apparatus characterized in that a dot deficiency of the display is a dot deficit due to a dark dot.
(Appendix 3) In the display inspection apparatus according to Appendix 1 or Appendix 2,
The moving unit moves the display by a distance greater than or equal to the width in the arrangement direction of the color filters, and moves the photosensitive surface by a distance greater than or equal to the product of the width in the arrangement direction of the color filters and the optical magnification of the optical system. Display inspection device characterized by the above.
(Supplementary note 4) In the display inspection apparatus according to any one of supplementary notes 1 to 3,
A display inspection apparatus, wherein an optical magnification of an optical system of the camera is 1 or less.
(Appendix 5) In the display inspection apparatus according to any one of Appendix 1 to Appendix 4,
A luminance setting unit that sets a plurality of different primary color filters in the display to different luminances;
The camera is a monochrome camera;
The brightness of the color filter adjacent to the dot in the second captured image that is an image captured by the second image capturing unit and the color filter adjacent to the dot in the first captured image is the second determination unit. A display inspection apparatus characterized by determining whether or not they are different.
(Appendix 6) In the display inspection apparatus according to any one of Appendix 1 to Appendix 5,
A display inspection apparatus, wherein a photosensitive surface of the camera is provided so as to be parallel to the display.
(Supplementary note 7) In the display inspection apparatus according to any one of supplementary notes 1 to 6,
The type of the color filter adjacent to the dot in the second captured image that is an image captured by the second imaging unit by the second determination unit and the color filter adjacent to the dot in the first captured image are different. A third determination unit that determines whether or not the size or number of the dots exceeds a predetermined reference,
A display inspection further comprising a foreign substance determination unit that, when the third determination unit determines that the size or number of the dot is over a predetermined standard, the display is a defective product having a dot due to the foreign object. apparatus.
(Supplementary note 8) In the display inspection apparatus according to any one of supplementary notes 1 to 7,
The type of the color filter adjacent to the dot in the second captured image that is an image captured by the second imaging unit by the second determination unit and the color filter adjacent to the dot in the first captured image are different. A fourth determination unit that determines whether or not the size or number of the dotted points exceeds a predetermined reference when it is determined that
When the fourth determination unit determines that the size or number of the dot points exceeds a predetermined reference, the dot determination unit further sets the display to be a defective product with dot points due to the dot points. Display inspection device.
(Supplementary note 9) A display inspection method for imaging a display in which a plurality of different primary color filters in a mixed color are arranged in pixels by a camera including a photosensitive surface and an optical system,
A first imaging step of imaging the display by the camera;
A first determination step of determining whether or not there is a dot in the display based on a first captured image that is an image captured by the first imaging step;
When it is determined in the first determination step that the display has a dot, the display is moved in the arrangement direction of the color filters in the pixels, and the photosensitive surface of the camera is moved in the direction opposite to the movement direction of the display. A moving step to move;
A second imaging step of imaging the display by the camera in a state where the display is moved by the moving step and the photosensitive surface is moved in a direction opposite to the moving direction of the display;
Determining whether the color filter adjacent to the dot in the second captured image that is the image captured in the second imaging step is different from the color filter adjacent to the dot in the first captured image; 2 judgment steps;
If it is determined in the second determination step that the color filter adjacent to the dot in the second captured image is different from the color filter adjacent to the dot in the first captured image, the dot filter of the display A display inspection method comprising: a determination step in which a dot is caused by a foreign object.
(Appendix 10) In the display inspection method according to appendix 9,
If it is determined in the second determination step that the color filter adjacent to the dot in the second captured image and the color filter adjacent to the dot in the first captured image are not different, the determination step includes A display inspection method characterized in that a dot deficiency of the display is a dot deficit due to a dark dot.
(Supplementary note 11) In the display inspection method according to supplementary note 9 or supplementary note 10,
In the moving step, the display is moved by a distance greater than or equal to the width of the color filter in the arrangement direction, and the photosensitive surface is moved by a distance greater than or equal to the product of the width of the color filter in the arrangement direction and the optical magnification of the optical system. A display inspection method characterized by the above.
(Supplementary note 12) In the display inspection method according to any one of supplementary notes 9 to 11,
A display inspection method, wherein an optical magnification of the optical system of the camera is 1 or less.
(Supplementary note 13) In the display inspection method according to any one of supplementary notes 9 to 12,
A luminance setting step of setting a plurality of different primary color filters in the display to different luminances;
The camera is a monochrome camera;
In the second determination step, the brightness of the color filter adjacent to the dot in the second captured image, which is the image captured in the second imaging step, and the color filter adjacent to the dot in the first captured image are determined. A display inspection method characterized by determining whether or not they are different.
(Supplementary Note 14) In the display inspection method according to any one of Supplementary Notes 9 to 13,
A display inspection method, wherein a photosensitive surface of the camera is provided so as to be parallel to the display.
(Supplementary Note 15) In the display inspection method according to any one of Supplementary Notes 9 to 14,
The type of the color filter adjacent to the dot in the second captured image, which is the image captured in the second imaging step, and the color filter adjacent to the dot in the first captured image are different in the second determination step. A third determination step for determining whether or not the size or number of the dot points exceeds a predetermined criterion,
A display inspection further comprising a foreign matter determination step in which the display determines that the display is a defective product in which there is a point defect due to foreign matter when it is determined in the third determination step that the size or number of the point lacks exceeds a predetermined reference. Method.
(Supplementary Note 16) In the display inspection method according to any one of Supplementary Notes 9 to 15,
The type of the color filter adjacent to the dot in the second captured image that is the image captured in the second imaging step and the color filter adjacent to the dot in the first captured image are different in the second determination step. A fourth determination step for determining whether or not the size or number of the dots exceeds a predetermined reference when it is determined that
When it is determined in the fourth determining step that the size or number of the dot missing exceeds a predetermined standard, the dark spot determining step for making the display a defective product having a dot missing due to the dark dot is further provided. Display inspection method.

It is a figure which shows the structure of the display test | inspection apparatus which concerns on this Embodiment. It is a figure which shows the mobile telephone as a test object. It is a figure which shows the example which images the display with dust from a different viewing angle. It is a figure which shows the example which images a display with a dark spot with a different viewing angle. It is a flowchart which shows operation | movement of the display test | inspection apparatus which concerns on this Embodiment. It is a figure which shows the position of the black spot in the captured image before an imaging position movement. It is a figure which shows the position of the black spot in the captured image after an imaging position movement. It is a figure which shows the brightness | luminance of a color filter. It is a figure which shows the color filter from which the brightness in a captured image differs. It is a flowchart which shows the operation | movement of a foreign material inspection process. It is a flowchart which shows the operation | movement of a dark spot inspection process. It is a figure which shows the liquid crystal display in which dust and a dark spot exist.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Display test | inspection apparatus, 2 Mobile phone, 11 Imaging part, 12 Test object moving part, 21 Display, 111 CCD moving part, 112 CCD, 113 Lens

Claims (10)

A display inspection apparatus for inspecting a display in which a plurality of color filters of different primary colors in a mixed color are arranged in a pixel,
A camera composed of a photosensitive surface and an optical system;
A first imaging unit that images the display with the camera;
A first determination unit that determines whether or not the display has a dot, based on a first captured image that is an image captured by the first imaging unit;
When the first determination unit determines that the display has a dot, the display is moved in the arrangement direction of the color filters in the pixels, and the photosensitive surface of the camera is moved in the direction opposite to the movement direction of the display. A moving part to move;
A second imaging unit that images the display by the camera in a state where the display is moved by the moving unit and the photosensitive surface is moved in a direction opposite to the moving direction of the display;
Determining whether the color filter adjacent to the dot in the second captured image, which is an image captured by the second imaging unit, and the color filter adjacent to the dot in the first captured image are different; 2 determination units;
If the second determination unit determines that the color filter adjacent to the dot in the second captured image is different from the color filter adjacent to the dot in the first captured image, the dot filter of the display A display inspection apparatus comprising: a determination unit that uses a foreign object as a point defect. The display inspection apparatus according to claim 1,
When the second determination unit determines that the color filter adjacent to the dot in the second captured image and the color filter adjacent to the dot in the first captured image are not different, the determination unit A display inspection apparatus characterized in that a dot deficiency of the display is a dot deficit due to a dark dot. The display inspection apparatus according to claim 1 or 2,
The moving unit moves the display by a distance greater than or equal to the width in the arrangement direction of the color filters, and moves the photosensitive surface by a distance greater than or equal to the product of the width in the arrangement direction of the color filters and the optical magnification of the optical system. Display inspection device characterized by the above. The display inspection apparatus according to any one of claims 1 to 3,
A display inspection apparatus, wherein an optical magnification of an optical system of the camera is 1 or less. The display inspection apparatus according to any one of claims 1 to 4,
A luminance setting unit that sets a plurality of different primary color filters in the display to different luminances;
The camera is a monochrome camera;
The brightness of the color filter adjacent to the dot in the second captured image that is an image captured by the second image capturing unit and the color filter adjacent to the dot in the first captured image is the second determination unit. A display inspection apparatus characterized by determining whether or not they are different. A display inspection method for imaging a display in which color filters of a plurality of different primary colors in a mixed color are arranged in pixels by a camera comprising a photosensitive surface and an optical system,
A first imaging step of imaging the display by the camera;
A first determination step of determining whether or not there is a dot in the display based on a first captured image that is an image captured by the first imaging step;
When it is determined in the first determination step that the display has a dot, the display is moved in the arrangement direction of the color filters in the pixels, and the photosensitive surface of the camera is moved in the direction opposite to the movement direction of the display. A moving step to move;
A second imaging step of imaging the display by the camera in a state where the display is moved by the moving step and the photosensitive surface is moved in a direction opposite to the moving direction of the display;
Determining whether the color filter adjacent to the dot in the second captured image that is the image captured in the second imaging step is different from the color filter adjacent to the dot in the first captured image; 2 judgment steps;
If it is determined in the second determination step that the color filter adjacent to the dot in the second captured image is different from the color filter adjacent to the dot in the first captured image, the dot filter of the display A display inspection method comprising: a determination step in which a dot is caused by a foreign object. The display inspection method according to claim 6,
If it is determined in the second determination step that the color filter adjacent to the dot in the second captured image and the color filter adjacent to the dot in the first captured image are not different, the determination step includes A display inspection method characterized in that a dot deficiency of the display is a dot deficit due to a dark dot. The display inspection method according to claim 6 or 7,
In the moving step, the display is moved by a distance greater than or equal to the width of the color filter in the arrangement direction, and the photosensitive surface is moved by a distance greater than or equal to the product of the width of the color filter in the arrangement direction and the optical magnification of the optical system. A display inspection method characterized by the above. The display inspection method according to any one of claims 6 to 8,
A display inspection method, wherein an optical magnification of the optical system of the camera is 1 or less. The display inspection method according to any one of claims 6 to 9,
A luminance setting step of setting a plurality of different primary color filters in the display to different luminances;
The camera is a monochrome camera;
In the second determination step, the brightness of the color filter adjacent to the dot in the second captured image, which is the image captured in the second imaging step, and the color filter adjacent to the dot in the first captured image are determined. A display inspection method characterized by determining whether or not they are different.

Images