JP4893382B2 - Light leakage inspection device - Google Patents

Description

  The present invention provides a display device including two or more display units adjacent to each other and a light source that transmits and illuminates a light transmission unit of each display unit. The present invention relates to a light leakage inspection apparatus for inspecting light leakage to a light transmission part.

  In recent years, a display device for a vehicle displays a large amount of information in a limited space. For example, a plurality of displays are used as an indicator for notifying an operation state of a device provided in the vehicle or a warning for warning of abnormality of the vehicle. The parts are arranged adjacent to each other. Specifically, a mark portion representing an indicator or a warning is formed on each display portion as a light transmission portion, and a light emitting diode for transmission illumination is provided behind each light transmission portion. In addition, each light emitting diode has a structure that is shielded by a case so as not to transmit and illuminate the adjacent light transmitting portion.

  By turning on each light emitting diode, a necessary light transmitting portion is caused to emit light, and an indicator or warning indicated by the light transmitting portion is notified to the driver. Thereby, many indicators and warnings can be notified using a limited space.

  However, due to a manufacturing error or the like, light may leak from the light emitting diode to the light transmitting portion adjacent to the light emitting diode that is turned on, and the light transmitting portion may be transmitted and illuminated to display light slightly. As a result, the appearance deteriorates, and the quality of light leakage is determined by visual inspection to select non-defective products. However, in order to suppress the man-hour increase by visual inspection, it is required to automate this light leakage inspection.

  In order to automate the light leakage inspection, it is necessary to use imaging means such as a camera. For example, the inspection transmission part is photographed by the imaging means in a state where the light emitting diode of the inspection transmission part which is the light transmission part to be inspected is turned off and the light emitting diode adjacent thereto is turned on. The image information obtained by this photographing is input to a computer, and the quality of light leakage is determined based on the brightness information of the inspection transmission part in this image information.

  However, since this light leakage inspection requires the light emitting diode adjacent to the inspection transmission part to be turned on, the light from the lighted light emitting diode transmits and illuminates the light transmission part corresponding to the light emitting diode to cause halation. Is generated. This halation affects the inspection transmission part as noise in light leakage inspection, making it difficult to automate light leakage inspection by photographing.

  In particular, when the light leakage from the inspection transmission part is low below the reference level for quality determination, the brightness of the inspection transmission part in the image information may not be discriminated from the lightness of the background part of the inspection transmission part due to halation. In this case, it becomes difficult to specify the inspection transmission part in the image information, and there is a possibility that the brightness information of the background part in the image information is erroneously determined as light leakage from the inspection transmission part.

  This problem is not limited to automating light leakage inspection of indicators and warnings adjacent to each other, but is also a common problem when automating light leakage inspection of bar graphs in which a plurality of light transmission parts are arranged adjacent to each other, for example. is there. In addition, this problem is not limited to a display device for a vehicle. In a display device including two or more display units adjacent to each other and a light source that transmits and illuminates a light transmission unit of each display unit, the display unit to be inspected This is a problem common to the automation of a light leakage inspection apparatus that inspects light leakage from the light source of the display unit adjacent to the light transmission portion to be inspected.

  The present invention has been made in view of such circumstances, and in a display device including two or more display units adjacent to each other and a light source that transmits and illuminates a light transmission unit of each display unit, An object of the present invention is to provide a light leakage inspection apparatus capable of automating a light leakage inspection from a light source of a display unit adjacent to the display unit to a light transmission unit to be inspected.

  In order to achieve the above object, the present invention employs the following technical means.

Light leakage inspecting device according to claim 1, and 2 or more display portions adjacent to each other, in a display device and a light source for transmitted illumination light transmission portion of the display unit, one among the plurality of display One was an inspection display unit of the inspection object, a light leakage inspection apparatus for inspecting the leakage of light to the light transmitting portion of the test display unit from the light source of the display unit adjacent to the inspection display unit, points lamp-extinguishing lamp of the light source The inspection display unit is photographed while the inspection light source, which is the light source of the inspection display unit, is turned on, and the light source of the display unit that is turned off and is adjacent to the inspection display unit the lit by the Kagesu Ru imaging means Taking the inspection display unit in a state that point lamp image information captured by the imaging means in a state in which light the inspection light source, and extinguished and inspecting the display unit an inspection light source Take the picture with the imaging means while the light source of the display section adjacent to Storage means for storing the extinguishing lamp image information, that is, for a lighted image information and Sho燈image information stored in the storage means, first lit image information inspection transmissive portion is a light transmitting portion of the test display After the identification in step 3, the dot image information and the extinction image information are aligned and overlapped so that the area of the extinction image information corresponding to the inspection transmission part specified by the dot image information performing a specifying means for specifying a contact Keru inspection transmitting unit to the information, capture the brightness information you Keru inspection transmissive portion extinguishing lamp image information specified by the specifying means, a quality determination of the light leakage in the inspection display unit by brightness information And determining means.

  In this configuration, since the inspection light source is turned on in the dot image information, the inspection transmission part can be reliably specified in the dot image information. Further, in this configuration, the inspection transmission part is specified in the disappearance image information by aligning and overlapping the dot image information and the disappearance image information. For this reason, regardless of the influence of halation caused by turning on the light source of the display section adjacent to the inspection display section, the inspection transmission section can be reliably specified in the extinction image information.

  Further, in this configuration, the lightness information of the inspection transmission part specified in the extinguished image information is taken in, and the quality of light leakage is determined based on this lightness information. Thereby, the light leakage from the adjacent light source to the inspection transmission portion can be inspected reliably by using the imaging means based on the lightness information of the inspection transmission portion specified in the extinction image information. Therefore, the light leakage inspection from the adjacent light source to the inspection light transmitting portion can be automated using the imaging means.

According to a second aspect of the present invention, there is provided a leakage inspection apparatus including: a display device including two or more display units adjacent to each other; and a light source that transmits and illuminates a light transmission unit of each display unit. This is a light leakage inspection device for inspecting light leakage from the light source of the display unit adjacent to the inspection display unit to the light transmission unit of the inspection display unit. The inspection display unit is photographed with the control means for controlling and the inspection light source being the light source of the inspection display unit turned on, and the light source of the display unit adjacent to the inspection display unit is turned off and the inspection light source is turned off. Imaging means for photographing the inspection display section in the lighting state, pointed image information photographed by the imaging means in the state where the inspection light source is turned on, and the inspection light source are turned off and adjacent to the inspection display section Take the picture with the imaging means with the light source on the display turned on. Storage means for storing the extinguishing lamp image information, that is, for a lamp image information that has been stored in the storage means and Sho燈image information, first lighting test transmissive portion is a light transmitting portion of the test display unit in the image information after identifying both the background portion of the test transmission part and, by overlaying and aligning the lighted image information and Sho燈image information, erasing lamp corresponding to the check transmission unit identified by lighted image information the area of the image information together with identifying as a test transmission unit in Sho燈image information, identifying the areas of anti lamp image information corresponding to the background portion, which is specified by the lit image information as Contact Keru background portion extinguishing lamp image information specifying means takes in both the background brightness information of the brightness information and the background portion of your Keru inspection transmissive portion extinguishing lamp image information specified by the specifying means, the processing brightness information from brightness information by removing the background brightness information extraction to And , Characterized in that it comprises a determining means for performing a quality determination of the light leakage in the inspection display unit by processing brightness information.

  In this configuration, since the inspection light source is turned on in the dot image information, the background portion of the inspection transmission portion can be reliably specified in the dot image information. Further, in this configuration, since the background portion is specified in the extinguished image information by aligning and overlaying the extinguished image information and the extinguished image information, the influence of halation due to the lighting of the adjacent light source Irrespective of this, it is possible to reliably specify the background portion in the extinguished image information.

  Further, in this configuration, the background lightness information of the background portion specified in the extinguished image information is taken in, the background lightness information is removed from the lightness information, and the process lightness information is taken out. Do. Here, the lightness information has both light leakage and halation, whereas the background lightness information has only halation. For this reason, the processed lightness information obtained by removing the background lightness information from the lightness information has only light leakage in principle. Therefore, it is possible to improve the accuracy of the light leakage quality determination by performing the light leakage quality determination based on the process lightness information.

In light leakage inspecting device according to claim 3, the imaging means simultaneously capturing all of the display unit in a state in which all points lamp light source, and, a light source in a state of being lit-Sho燈light sources alternately vanishing The storage means captures all the display sections simultaneously, and the storage means turns on and off the lighting image information obtained by photographing all the display sections with the imaging means in a state where all the light sources are turned on, and the light sources alternately. In this state, it is characterized in that extinguished image information obtained by simultaneously photographing all the display portions in which the light source is extinguished by the imaging means is stored . Thereby, the light leakage inspection can be performed efficiently while obtaining the above-described effects.

  Hereinafter, a case where the light leakage inspection apparatus according to the present invention is applied to a display device mounted on an automobile will be described with reference to the drawings.

  A combination meter 1 which is a display device shown in FIG. 1 is disposed at a position where a driver can view in front of a driver's seat of the automobile, and displays various information related to the automobile. Specifically, the combination meter 1 includes a dial 2 and a pointer 3 to indicate a traveling speed of the automobile, an indicator for informing an operation state of a device provided in the automobile, and an abnormality of the automobile. The display unit 4 is provided as a warning to be performed.

  As shown in FIG. 2, behind the two or more display units 4 adjacent to each other, as shown in FIG. 2, a light emitting diode (light source) that is a light source that transmits and illuminates a mark unit (including characters) 41 that is a light transmission unit of each display unit 4. LED) 5 is arranged. As shown in FIGS. 2 and 3, the mark portion 41 is formed as an opening of the background portion 42, and is opaque on the front side of the viewing side of the transparent resin substrate 20 such as a transparent polycarbonate resin. The background part 42 is formed as a printing layer. The printed circuit board 7 constitutes an electric circuit part of the combination meter 1, and the light emitting diode 5 is mounted on the printed circuit board 7.

  Case 6 guides the light from each light emitting diode 5 to each mark part 41 according to arrow P, and causes display part 4 to emit light. Each light-emitting diode 5 is shielded from light by the case 6 so that the adjacent mark portion 41 is not transmitted and illuminated.

  Next, the light leakage inspection apparatus according to the present embodiment will be described with reference to FIG.

  In FIG. 4, the light leakage inspection apparatus 10 detects light leakage from the light emitting diode 52 of the display unit 4b adjacent to the inspection display unit 4a that is the display unit 4 to be inspected to the mark unit 41a that is the inspection transmission unit of the inspection display unit 4a. That is, it is an inspection apparatus that inspects the light leakage indicated by the arrow PL. As shown in FIG. 4, the light leakage inspection apparatus 10 includes a control device 11 that is a control means, a specifying means, and a determination means, and a camera 12 that is an imaging means.

  The control device 11 is composed of a microcomputer or the like and includes a memory 11a. The memory 11a is a memory including an electrically rewritable nonvolatile memory or a backup RAM (random access memory). The control device 11 controls turning on / off of all the light emitting diodes 5 including the light emitting diodes 52.

  The camera 12 is, for example, a camera with 5 million pixels, and is configured by a plurality of cameras as necessary. The camera 12 captures all the display units 4 including the examination display unit 4a, and displays each image information on the display unit 4. get. Specifically, the camera 12 shoots the inspection display unit 4a in a state where the light emitting diode 51 which is the inspection light source of the inspection display unit 4a is turned on, acquires the lighting image information A, and turns off the light emitting diode 51. The inspection display unit 41a is photographed while the light emitting diode 52 is turned on and the extinction image information B is acquired.

  The memory 11a captures and stores the dot image information A and the erased image information B. The control device 11 reads the blinking image information A and the extinguished image information B from the memory 11a, and inspects light leakage to the mark unit 41a described later. Here, the light from the light-emitting diode 52 turned on transmits and illuminates the mark portion 41b corresponding to the light-emitting diode, and generates halation indicated by an arrow PH. The light leakage inspection apparatus 10 suppresses the influence of halation indicated by the arrow PH, and enables inspection of light leakage to the mark portion 41a using the camera 12, thereby enabling automation of the light leakage inspection.

  Next, the light leakage inspection by the control device 11 using the dot image information A and the extinction image information B will be described with reference to FIG.

  The mark portion 41a is specified as the region 41aa in the dot image information A, and the mark portion 41a is specified as the region 41ab in the extinction image information B by aligning and overlapping the dot image information A and the extinction image information B. . Specifically, in the extinction image information B, the brightness information of the area 42ab corresponding to the background portion 42 is set to zero, and the brightness information of the area 41ab is left as it is.

  The lightness I (%) at the position of the arrow X in the extinction image information B before specification is indicated by a broken line graph G1, and the lightness I (%) at the position of the arrow X in the extinction image information B after specification. Is shown by a solid line graph G2. As can be understood from the graphs G1 and G2, it is difficult to specify the mark portion 41a (corresponding to the region 41ab) in the erased image information B before specification due to the influence of halation, whereas the erased image after specification is difficult. In the information B, the mark portion 41a can be easily specified.

  Here, in the extinguished image information B, “the brightness information of the area 42ab corresponding to the background part 42 is set to zero” is a process of multiplying the brightness I of the area 42ab by zero to set the brightness I to 0%. The “leave the brightness information I of the area 41ab corresponding to the mark portion 41a as it is” is a process of multiplying the brightness I of the area 41ab by “1” and leaving the brightness I as it is.

  Similarly, in the arrow Y direction, the brightness information of the area 41ab specified in the extinguished image information B is taken in, and the quality of light leakage is determined based on the brightness information. That is, since the light emitting diode 51 is turned on in the dot image information A, the mark portion 41a can be reliably specified as the region 41aa in the dot image information A. In addition, the mark image 41A is specified as the region 41ab in the erased image information B by aligning and overlaying the dot image information A and the erased image information B. Therefore, the mark portion 41a can be reliably specified as the region 41ab in the extinction image information B regardless of the influence of halation caused by turning on the light emitting diode 52 of the display portion 4b adjacent to the inspection display portion 4a.

  Further, the brightness information of the mark portion 41a (corresponding to the region 41ab) specified in the extinguished image information B is taken in, and the quality of light leakage is determined based on the brightness information. Thereby, the light leakage from the adjacent light emitting diode 52 to the mark portion 41a can be reliably inspected by the lightness information of the mark portion 41a that is reliably specified in the extinction image information B. In other words, the influence of halation can be suppressed, and the inspection of light leakage to the mark portion 41a using the camera 12 can be performed, whereby the light leakage inspection from the adjacent light emitting diode 52 to the mark portion 41a can be automated.

  Next, a method for acquiring the dot image information A and the extinction image information B will be described with reference to FIG.

  The camera 12 captures all of the display units 4 at the same time with all the light-emitting diodes 5 turned on to obtain the lighting image information A of each display unit 4, and turns on and off the light-emitting diodes 5 alternately. The display unit 4 (the display unit 4 surrounded by the broken four corners in FIG. 6) in which the light-emitting diode 5 is extinguished in a state of being turned is simultaneously photographed, and the display unit surrounded by the four broken corners. Each piece of extinction image information B of 4 is acquired. Thereafter, all of the display units 4 (the display units 4 not surrounded by the broken four corners in FIG. 6) in which the light-emitting diodes 5 are turned off while the light-emitting diodes 5 are switched on / off are simultaneously displayed. Photographing is performed, and each extinction image information B of the display unit 4 that is not surrounded by the broken four corners is acquired.

  Thereby, each dot image information A and each extinction image information B of many display parts 4 can be acquired efficiently, and a light leakage test can be performed efficiently.

  Next, the operation flow of the light leakage inspection apparatus 10 will be described based on the flowchart of FIG.

  An inspection program is started by turning on a switch (not shown), and all the light emitting diodes (LEDs) 5 are turned on in step S1. In step S2, the camera 12 captures all of the display units 4 in the state of step S1 at the same time to acquire the dot image information A of each display unit 4, and the memory 11a captures and stores the dot image information A. To do.

  In step S3, the light emitting diode 51 is turned off and the light emitting diode 52 is turned on. That is, the light emitting diodes 5 are alternately turned on and off. In step S4, the camera 12 captures all the extinguished image information B by simultaneously photographing all the display units 4 in which the light emitting diodes 5 are extinguished in the state of step S3, and the memory 11a stores the extinguished image information. Capture and store B. In step S3, the light emitting diode 5 is turned on / off, and in step S4, the camera 12 captures all of the display unit 4 that has been extinguished in this state, and displays each extinction image information B. The memory 11a acquires and stores the extinguished image information B. In steps S1 to S4, the dot image information A and the erased image information B of all the display units are stored in the memory 11a.

  In step S5, the dot image information A and the erased image information B are aligned and superimposed on each display unit 4, and in step S6, the mark portion 41a (corresponding to the region 41ab) is displayed in the erased image information B. Identify. In step S7, each display unit 4 determines the quality of light leakage based on the brightness information of the mark unit 41a, and ends the inspection program. Thereby, the light leakage inspection from the adjacent light emitting diode 52 to the mark part 41a can be automated.

(Modification)
In the above-described example, the brightness information of the mark portion 41a (corresponding to the region 41ab) specified in the extinguished image information B is taken in, and the light leakage quality is determined based on the brightness information. On the other hand, in this modification, the influence of halation is removed from this brightness information, and the quality of light leakage is determined.

  Hereinafter, this modification will be described with reference to FIG.

  The background portion 42a is specified as the region 42aa in the dot image information A, and the background portion 42a is specified as the region 42ab in the extinction image information B by aligning and overlapping the dot image information A and the extinction image information B. . The background brightness information of the background part 42a (corresponding to the area 42ab) specified in the extinguished image information B is taken in, the background brightness information is removed from the brightness information, and the process brightness information is taken out.

  The lightness information is indicated by a broken line graph G2, the process lightness information is indicated by a solid line graph G3, and the background lightness information is indicated by ΔI. ΔI is obtained as an average value of the brightness I indicated by the graph G1 (FIG. 5) in the specified background portion 42a (corresponding to the region 42ab), and the processed brightness information indicated by the solid line graph G3 is the brightness indicated by the broken line graph G2. It is obtained by removing background lightness information indicated by ΔI from the information. Whether the light leakage is good or bad is determined based on the processing lightness information.

  That is, since the light emitting diode 51 is turned on in the dot image information A, the background portion 42a can be reliably specified as the region 42aa in the dot image information A. Further, in order to identify the background portion 42a as the region 42ab in the extinguished image information B by aligning and overlaying the extinguished image information A and the extinguished image information B, the halation caused by turning on the light emitting diode 52 Regardless of the influence of, the background portion 42a can be reliably specified as the region 42ab in the extinguished image information B.

  Also, the background lightness information (ΔI) of the background part 42a (corresponding to the region 42ab) specified in the extinguished image information B is taken in, and the background lightness information is removed from the lightness information (graph G2). G3) is taken out, and the quality of light leakage is determined based on the processing lightness information. Here, the lightness information has both light leakage and halation, whereas the background lightness information has only halation. For this reason, the processed lightness information obtained by removing the background lightness information from the lightness information has only light leakage in principle. Therefore, it is possible to improve the accuracy of the light leakage quality determination by performing the light leakage quality determination based on the process lightness information.

  The light leakage inspection apparatus 10 according to the present embodiment described above includes two or more display units 4 adjacent to each other, and the light emitting diode 5 that is a light source that transmits and illuminates the mark unit 41 that is a light transmission unit of each display unit 4. In the combination meter 1, which is a display device, a light leakage inspection device for inspecting light leakage from the light emitting diode 52 of the display unit 4b adjacent to the inspection display unit 4a to be inspected in the display unit 4 to the light transmitting unit 41a of the inspection display unit 4a 10 and the inspection display unit 4a in a state where the control device 11 which is a control means for controlling turning on / off of the light emitting diode 5 and the light emitting diode 51 which is the inspection light source of the inspection display unit 4a are turned on. Is taken to obtain the lighting image information A, and the light emitting diode 51 is turned off and the light emitting diode 52 of the display portion 4b adjacent to the inspection display portion 4a is turned on. In the state, the camera 12, which is an imaging means for capturing the inspection display unit 4a to acquire the extinguished image information B, and the inspection image transmitting unit of the inspection display unit 4a by taking in the dot image information A and the extinguishing image information B A specifying means for specifying a mark portion 41a in the turned-off image information A by specifying the mark portion 41a in the turned-out image information A, and aligning and overlaying the turned-out image information A and the turned-off image information B. There is provided a certain control device 11 and a control device 11 that is a determination unit that takes in the lightness information of the mark portion 41a in the extinguished image information B and determines the quality of light leakage based on the lightness information.

  Thereby, the light leakage inspection from the adjacent light emitting diode 52 to the mark part 41a can be automated.

  In the above-described example, the display unit 4 is an indicator or a warning adjacent to each other. However, the display unit 4 is not limited to this. For example, the display unit 4 may be a bar graph in which a plurality of light transmission units are arranged adjacent to each other. In this case, each display unit corresponds to each bar unit of the bar graph, and the bar units are arranged adjacent to each other to form one bar graph.

  Moreover, it is not restricted to the display part of the display apparatus for vehicles.

  Note that the present invention is not limited to the above-described example, and combinations thereof and other various modifications are conceivable.

FIG. 1 is a front view of a combination meter 1 that is a display device to which a light leakage inspection apparatus 10 according to an embodiment of the present invention is applied. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is an enlarged view of a portion III in FIG. FIG. 4 is a block diagram showing the configuration of the light leakage inspection apparatus 10 according to one embodiment of the present invention. FIG. 5 is a first explanatory diagram of the light leakage inspection by the light leakage inspection apparatus 10 shown in FIG. FIG. 6 is a second explanatory diagram of the light leakage inspection by the light leakage inspection apparatus 10. FIG. 7 is a flowchart showing an operation flow of the light leakage inspection apparatus 10. FIG. 8 is an explanatory diagram showing a modification of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combination meter (display device), 2 Dial, 20 Translucent resin substrate 3 Pointer, 4 Display part, 4a Inspection display part, 4b Display part, 41 Mark part (light transmission part)
41a Mark part (inspection transmission part), 41b Mark part (light transmission part), 42 Background part
5 Light emitting diode (light source, LED), 51 Light emitting diode (inspection light source, LED)
52 Light-emitting diode (light source, LED), 6 cases, 7 Printed circuit board 10 Light leakage inspection device, 11 Control device (control means, identification means, determination means)
11a memory, 12 cameras (imaging means)

Claims (3)

And two or more adjacent display unit with each other, in a display device and a light source for transmitted illumination light transmitting portion of each of the display unit, the inspection display unit of the inspection target one of the plurality of display , a light leakage inspection apparatus for inspecting the leakage of light to the light transmitting portion of the test display unit from the light source of the display unit adjacent to the inspection display unit,
Control means for controlling turning on and off of the light source;
The inspection display unit is photographed while the inspection light source which is the light source of the inspection display unit is turned on, and the inspection light source is turned off and the light source of the display unit adjacent to the inspection display unit is turned on. and Kagesu Ru imaging means Taking the inspection display unit in to that state,
The dot image information photographed by the imaging means in a state where the inspection light source is turned on, and the state where the inspection light source is turned off and the light source of the display unit adjacent to the inspection display unit is turned on. Storage means for storing erased image information photographed by the imaging means;
For the dot image information and the extinguished image information stored in the storage means , first , an inspection transmission part that is a light transmission part of the inspection display unit is specified in the dot image information, and then the dot image is displayed. by superimposing and aligning the information and digested lantern image information, an area of the digestion lamp image information corresponding to the test transmission part identified by said point lamp image information, Keru Contact the digestion lamp image information A specifying means for specifying the inspection transmission part;
Capture the brightness information of your Keru the inspection transmitting unit to the vanishing lamp image information specified by the specifying means, it characterized in that it comprises a determining means for performing a quality determination of the light leakage in the inspection display unit by該明degree information Light leakage inspection device. In a display device including two or more display units adjacent to each other and a light source that transmits and illuminates the light transmission unit of each display unit, one of the plurality of display units is an inspection display unit to be inspected, A light leakage inspection apparatus for inspecting light leakage from a light source of a display unit adjacent to the inspection display unit to a light transmission unit of the inspection display unit,
Control means for controlling turning on and off of the light source;
The inspection display unit is photographed while the inspection light source which is the light source of the inspection display unit is turned on, and the inspection light source is turned off and the light source of the display unit adjacent to the inspection display unit is turned on. Imaging means for photographing the examination display unit in a state where
The dot image information photographed by the imaging means in a state where the inspection light source is turned on, and the state where the inspection light source is turned off and the light source of the display unit adjacent to the inspection display unit is turned on. Storage means for storing erased image information photographed by the imaging means;
Regarding the dotted image information and the extinguished image information stored in the storage means, first, in the dotted image information, an inspection transmission part which is a light transmission part of the inspection display part, and a background part of the inspection transmission part , after both identify, by overlaying and aligning the anti lamp image information and the point lamp image information, area of the extinguishing lamp image information corresponding to the test transmission part identified by said point lamp image information the thereby identified as the inspection transmitting portion of the digested lamp image information, said point lamp image corresponding to the background portion specified by the information digested lantern image information area digested lamp image information to your Keru the background Identifying means for identifying as a part ,
Captures both the brightness information and background brightness information of the background portion of your Keru the inspection transmitting unit to the vanishing lamp image information specified by the specifying means, the processing brightness information from said brightness information by removing the background brightness information extraction, and, to that light leakage inspection apparatus, comprising a determining means by the processing brightness information performs quality determination of the light leakage in the inspection display unit. The imaging unit is configured to simultaneously shoot all of the display unit with all the light sources turned on , and the light source is turned off with the light sources alternately turned on / off. Shoot all of the
The storage means turns off the light source when the light source is turned on and turned off, and the lighting image information obtained by photographing all the display units by the imaging means and the light sources are turned on and off alternately. 3. The leakage inspection apparatus according to claim 1 , wherein the extinction image information obtained by simultaneously photographing all the display units performed by the imaging unit is stored .

Images