WO2018220840A1 - Display panel inspection device and display panel inspection method - Google Patents
Display panel inspection device and display panel inspection method Download PDFInfo
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- WO2018220840A1 WO2018220840A1 PCT/JP2017/020674 JP2017020674W WO2018220840A1 WO 2018220840 A1 WO2018220840 A1 WO 2018220840A1 JP 2017020674 W JP2017020674 W JP 2017020674W WO 2018220840 A1 WO2018220840 A1 WO 2018220840A1
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- display panel
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- polarizing plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Definitions
- the present invention relates to a display panel inspection apparatus and a display panel inspection method.
- Defects such as point defects, line defects, group defects, and chromaticity defects in the display panel are visually inspected by the inspector to view the display panel driven on the inspection stage, or the display panel driven on the inspection stage. Is captured by a television camera, and an output signal output from the television camera and indicating an image on the display panel is processed by a computer and detected by automatic inspection.
- Patent Document 1 Japanese Patent Laid-Open No. Hei 8-222014.
- This inspection apparatus for a display panel is arranged below a LCD (liquid crystal display) panel, a line light source movable along the lower surface of the LCD panel, and a line sensor arranged on the LCD panel and having a CCD (charge coupled device) And. Further, the line sensor is positioned so as to overlap the line light source in the vertical direction, and is provided so as to be movable in synchronization with the movement of the line light source.
- LCD liquid crystal display
- CCD charge coupled device
- the inspection device for a display panel having the above-described configuration inspects the LCD panel
- the line light source in the lit state is moved along the lower surface of the LCD panel, and the light from the line light source is sequentially applied to each portion of the lower surface of the LCD panel.
- the line sensor moves in synchronization with the movement of the line light source, and the CCD of the line sensor receives the light emitted from the LCD panel. That is, each part of the upper surface of the LCD panel is sequentially imaged.
- a signal indicating an image of each part on the upper surface of the LCD panel is output from the line sensor to the data processing unit, the data processing unit detects the defective pixel of the LCD panel, and the monitor displays the detection result of the defective pixel.
- a light-shielding member that does not transmit the light from the line light source is disposed on the space around the LCD panel so that light is not emitted from the space to the CCD. A way to do this is conceivable.
- the light-shielding member when a 60-inch LCD panel is to be inspected after a 70-type LCD panel is inspected, the light-shielding member must be replaced with a larger light-shielding member or a light-shielding member must be added. .
- the above method has a problem that when the panel size of the display panel is changed, the light shielding member is exchanged or added, so that the inspection efficiency is lowered.
- an object of the present invention is to provide a display panel inspection apparatus and a display panel inspection method capable of inspecting display panels having various panel sizes and preventing a decrease in inspection efficiency.
- An inspection apparatus for a display panel A display panel inspection apparatus for inspecting a display panel having an image display area, An imaging device disposed in front of the display panel and imaging the image display area; A light control member disposed between the display panel and the imaging device; The light control member is A light transmission region that transmits light emitted forward from the image display region; A light shielding region that blocks light traveling forward through a space adjacent to the peripheral edge of the display panel, The area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held.
- An inspection method for a display panel includes: An inspection method for a display panel for inspecting a display panel having an image display area, A light control member having a light transmission region that transmits light emitted forward from the image display region and a light shielding region that blocks light traveling forward through a space adjacent to a peripheral edge of the display panel; Placing between the panel and the imaging device; After the arrangement of the light control member, a step of imaging the image display area of the display panel with the imaging device in a state where light is emitted toward the display panel from a light source device arranged behind the display panel. And The area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held.
- the display panel inspection apparatus and display panel inspection method of the present invention can inspect display panels of various panel sizes and can prevent a decrease in inspection efficiency.
- FIG. 1 It is a schematic diagram for demonstrating adjustment of the area of the light-shielding area
- the same reference numerals represent the same or corresponding parts.
- the x axis corresponds to the thickness direction of the liquid crystal display panel
- the y axis corresponds to the horizontal direction of the screen of the liquid crystal panel
- the z axis corresponds to the vertical direction of the screen of the liquid crystal panel.
- FIG. 1 is a schematic diagram showing a schematic configuration of a main part of a display panel inspection apparatus according to a first embodiment of the present invention.
- the display panel inspection device is a display panel inspection device for inspecting, for example, 80-type and 70-type liquid crystal display panels 1, 1 ′, and includes a backlight unit 2 and a camera 3 as an example of an imaging device. And a light control panel 4 as an example of a light control member, and a computer 5. That is, the display panel inspection apparatus is configured to sequentially inspect the 80-type and 70-type liquid crystal display panels 1 and 1 '.
- a 70-type liquid crystal display panel 1 ′ and components thereof (image display area 11 ′ and black matrix 12 ′) are shown in FIG. 7.
- the 80-type and 70-type liquid crystal display panels 1 and 1 ′ are examples of display panels.
- the camera 3 is disposed in front of the liquid crystal display panel 1.
- the camera 3 images the image display area 11 of the 80-inch liquid crystal display panel 1 and outputs a signal indicating the imaging result.
- the camera 3 includes an image sensor 31 such as a CCD (Charged-coupled device) or a CMOS (Complementary metal-oxide-semiconductor), and receives light emitted forward from the image display region 11. At this time, a signal corresponding to the light is generated and output to the computer 5.
- CCD Charge-coupled device
- CMOS Complementary metal-oxide-semiconductor
- the backlight unit 2 is arranged behind the liquid crystal display panel 1.
- the backlight unit 2 receives power from a power supply unit (not shown) and emits light on the front surface. That is, the front surface of the backlight unit 2 emits light toward the 80-inch liquid crystal display panel 1. More specifically, the backlight unit 2 can adjust the brightness within a range of, for example, 7000 cd to 2200 cd, and the back surface of the 80-type liquid crystal display panel 1 (surface opposite to the camera 3 side) is uniform. It is possible to illuminate.
- the 80-inch liquid crystal display panel 1 has an image display area 11 on the front surface (surface on the light control panel 4 side). Each of the image display areas 11 is an area for displaying an image corresponding to the video signal.
- the image display area 11 is captured by a black matrix 12 that does not display an image corresponding to the video signal. That is, the black matrix 12 is formed on the peripheral edge of the front surface of the 80-type liquid crystal display panel 1.
- the light control panel 4 is disposed between the 80-inch liquid crystal display panel 1 and the camera 3.
- the light control panel 4 transmits light directed to the camera 3 through a light transmission region 41 that transmits light emitted forward from the image display region 11 and a space adjacent to the peripheral edge of the 80-type liquid crystal display panel 1.
- a light shielding region 42 for shielding.
- the first heater 6A, the second heater 6B, and the third heater 6C each have a spiral nichrome wire (not shown) inside.
- the nichrome wire is connected to a power source in order to pass a current through the nichrome wire.
- Each of the first heater 6A, the second heater 6B, and the third heater 6C is provided with a flat surface that is brought into contact with the light control panel 4.
- the first heater 6A, the second heater 6B, and the third heater 6C each have a nichrome wire as an example of a metal heating element, but other metal heating elements (for example, an iron chrome wire) are included therein. You may have inside.
- first heater 6A, the second heater 6B, and the third heater 6C may have a ceramic heating element therein. Further, the first heater 6A, the second heater 6B, and the third heater 6C are not positioned between the light control panel 4 and the camera 3 when the image display area 11 is imaged.
- the computer 5 includes a monitor 51 that displays images captured by the camera 3, inspection results, and the like, and a control device 52 that includes a CPU (Central Processing Unit), a memory, an input / output circuit, and the like.
- a CPU Central Processing Unit
- the control device 52 sends a control signal to the backlight unit 2 and the 80 type liquid crystal display panel 1 in order to control the backlight unit 2 and the 80 type liquid crystal display panel 1. More specifically, the control device 52 displays a test image on the backlight unit control unit 52a that controls lighting and non-lighting of the backlight unit 2 and the image display area 11 of the 80-inch liquid crystal display panel 1. An image display area control unit 52b and an inspection unit 52c for inspecting the presence or absence of so-called display quality defects such as unevenness, black spots, and white spots in the image display area 11 based on a signal from the camera 3 are provided. The inspection result output by the inspection unit 52c is displayed on the monitor 51.
- the control device 52 is configured to be capable of inspecting whether or not the display quality of the 70-type liquid crystal display panel 1 is poor, like the 80-type liquid crystal display panel 1.
- FIG. 2 is a schematic cross section of an 80-inch liquid crystal display panel 1.
- the liquid crystal display panel 1 includes a display panel main body 100, a front polarizing plate 124 disposed in front of the display panel main body 100, and a rear polarizing plate 114 disposed in the rear of the display panel main body 100.
- the display panel body 100 has the first glass substrate 101 on the rear polarizing plate 114 side, and the second glass substrate 102 on the front polarizing plate 124 side.
- a liquid crystal layer 103 is provided between the first glass substrate 101 and the second glass substrate 102.
- a sealing material 131 for sealing the liquid crystal sealed in the liquid crystal layer 103 is provided between the first glass substrate 101 and the second glass substrate 102 along the peripheral edge of the second glass substrate 102. ing.
- a plurality of TFTs (thin film transistors) 111, 111,... And pixel electrodes 112 of display pixels connected to the respective TFTs 111 are provided. Is formed.
- An alignment film 113 is stacked on the TFT 111 and the pixel electrode 112.
- a rear polarizing plate 114 is attached to the lower surface of the first glass substrate 101.
- a supply circuit board 115 is installed on the peripheral edge of the upper surface of the first glass substrate 101.
- the supply circuit board 115 sequentially supplies operation signals to the TFTs 111 in each row via a plurality of scanning signal wirings (not shown).
- a color filter layer 121 is formed under the lower surface of the second glass substrate 102 (the surface on the first glass substrate 101 side).
- the color filter layer 121 includes a plurality of red color filters 121A, green color filters 121B, and blue color filters 121C.
- Each red color filter 121A, each green color filter 121B, and each blue color filter 121C correspond to a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
- a counter electrode 122 and an alignment film 123 are stacked under the color filter layer 121.
- a front polarizing plate 124 is attached to the upper surface of the second glass substrate 102.
- the rear polarizing plate 114 and the front polarizing plate 124 are formed and arranged so that the absorption axis of the rear polarizing plate 114 and the absorption axis of the front polarizing plate 124 are orthogonal to each other.
- the rear polarizing plate 114 has an absorption axis parallel to the z axis
- the front polarizing plate 124 has an absorption axis parallel to the y axis.
- the pixel electrode 112 and the counter electrode 122 are transparent electrodes made of, for example, ITO (Indium Tin Oxide).
- a supply circuit board for supplying a data signal to the pixel electrode 112 is also installed on the peripheral edge of the upper surface of the first glass substrate 101.
- the internal structure of the 70-type liquid crystal display panel 1 ′ is the same as the internal structure of the 80-type liquid crystal display panel 1.
- FIG. 3 is a schematic perspective view of the light control panel 4 as viewed from the front side.
- the light control panel 4 is formed using a plate member 43 (for example, a glass plate) that transmits light emitted forward from the image display region 11.
- a plate member 43 for example, a glass plate
- the heat-sensitive layer 44 is formed on the front surface of the plate member 43 using, for example, a heat-sensitive agent containing a leuco dye and a developer.
- a portion colored by heating is a light shielding region 42.
- the portion that is not heated is the light transmission region 41.
- the light transmission region 41 and the light shielding region 42 are the lengths of the light transmission region 41 in the y-axis direction and the z-axis direction of the image display region 11 of the liquid crystal display panel 1 whose length in the y-axis direction and the z-axis direction is 80 type. It is formed so as not to be shorter.
- the inspector may perform heating of part of the heat-sensitive agent by the first heater 6A, the second heater 6B, and the third heater 6C, or may be performed by another device.
- the heat-sensitive layer 44 is transparent to light emitted forward from the image display region 11 before heating, and is transparent to light traveling toward the camera 3 through the periphery of the liquid crystal display panel 1. When it is heated, it develops color and becomes opaque to the light traveling through the periphery of the liquid crystal display panel 1 toward the camera 3.
- the color of the heat-sensitive agent after heating is not particularly limited as long as it is an opaque color with respect to the light traveling toward the camera 3 through the periphery of the liquid crystal display panel 1, but is distinguished from the image in the image display region 11. From the viewpoint of facilitating the process, for example, black is preferable.
- the lower part of the liquid crystal display panel 1 is fitted into a groove on the upper surface of a measurement table (not shown), and the liquid crystal display panel 1 is placed on the measurement table. Is installed. Thereby, the rear surface of the liquid crystal display panel 1 faces the front surface of the backlight unit 2.
- a mark for determining the positions of the 80-type and 70-type liquid crystal display panels 1 and 1 'with respect to the measurement table is attached to the measurement table.
- the light control panel 4 is arranged in front of the liquid crystal display panel 1 so that the inner edge of the light shielding region 42 faces the black matrix 12.
- the light control panel 4 is arranged so that the inner edge of the light shielding region 42 overlaps with a line passing through the center of the black matrix 12 in the width direction.
- the inner edge of the light shielding region 42 may overlap with a portion in the vicinity of a line passing through the center of the black matrix 12 in the width direction. Further, the light traveling toward the camera 3 through the area under the liquid crystal display panel 1 is blocked by the measurement table.
- the backlight unit 2 is turned on to display an inspection image in the image display area 11
- the image display area 11 is imaged by the camera 3 through the light transmission area 41. Thereby, the quality of the display quality of the 80-inch liquid crystal display panel 1 is displayed on the monitor 51.
- the 80-inch liquid crystal display panel 1 is lowered from the measurement table, and the 70-type liquid crystal display panel 1 ′ is installed on the measurement table in the same manner as the 80-type liquid crystal display panel 1.
- the temperature of the flat surfaces of the first heater 6 ⁇ / b> A, the second heater 6 ⁇ / b> B, and the third heater 6 ⁇ / b> C is increased to a predetermined temperature, and then the light transmission region 41 is adjacent to the light shielding region 42.
- the flat surfaces of the first heater 6A, the second heater 6B, and the third heater 6C are brought into contact with each other.
- the relationship between the light control panel 4 'and the liquid crystal display panel is as shown in FIG.
- the flat surfaces of the first heater 6A, the second heater 6B, and the third heater 6C are brought into contact with the portion of the light transmission region 41 adjacent to the light shielding region 42, and then the temperature of the flat surfaces is raised to a predetermined temperature. Also good.
- the backlight unit 2 is turned on to display an inspection image in the image display area 11 ′, and then the image display area 11 ′ is captured by the camera 3 through the light transmission area 41 ′. As a result, the quality of the display quality of the 70-inch liquid crystal display panel 1 ′ is displayed on the monitor 51.
- the inspection unit 52c can accurately inspect the liquid crystal display panel 1. Therefore, for example, unevenness correction of the display area can be accurately performed based on the inspection result of the inspection unit 52c.
- the area of the light shielding region 42 can be arbitrarily changed in a state where the position of the light control panel 4 with respect to the 80-inch liquid crystal display panel 1 is maintained. Thereby, even if the position of the light control panel 4 ′ at the time of inspection of the 70-inch liquid crystal display panel 1 ′ is the same as the position of the light control panel 4 at the time of inspection of the 80-inch liquid crystal display panel 1, Light directed to the camera 3 through a space adjacent to the peripheral edge of the panel 1 can be blocked by the light blocking region 42 '. Therefore, the liquid crystal display panel 1 having various panel sizes can be inspected, and a decrease in inspection efficiency can be prevented.
- the heat-sensitive layer 44 of the light control panel 4 when the heat-sensitive layer 44 of the light control panel 4 is heated, the heat-sensitive layer 44 becomes opaque to light traveling toward the camera 3 through a space adjacent to the peripheral edge of the liquid crystal display panel 1. Therefore, the area of the light shielding region 42 can be arbitrarily set by adjusting the area of the region to be heated.
- the display panel inspection apparatus includes the backlight unit 2.
- the backlight unit 2 may be omitted. Good. That is, instead of the backlight unit 2, a light source provided in the liquid crystal display panels 1 and 1 'may be used.
- the 80-type and 70-type liquid crystal display panels 1 and 1 ′ are inspected.
- the liquid crystal display panel having a size different from that of the 80-type and 70-type liquid crystal display panels 1 and 1 ′ is inspected. May be.
- the light control panel 4 ′ is obtained by heating a part of the light control panel 4 at the position at the time of inspection of the 80-inch liquid crystal display panel 1, but at a position different from the position. A part of the light control panel 4 may be heated to obtain the light control panel 4 ′.
- the first heater 6A, the second heater 6B, and the third heater 6C are used to form the light transmission region 41 ′ and the light shielding region 42 ′.
- a heater 60 having a U shape in plan view may be used.
- the heater 60 is only different in shape from the first heater 6A and the like, and can heat the heat-sensitive layer 44 of the light control panel 4 in the same manner as the first heater 6A and the like. Further, the shape of the heater 60 is set so that the area inside the heater 60 corresponds to the 70-type light transmission area 41 ′.
- the heater 60 is provided with a flat surface that contacts the light control panel 4.
- the temperature of the flat surface of the heater 60 is raised to a predetermined temperature, and then the light shielding region of the light transmission region 41 as shown in FIG.
- the flat surface of the heater 60 is brought into contact with a portion adjacent to 42. Thereby, as shown in FIG. 6, the light transmission area
- the temperature of the flat surface may be raised to a predetermined temperature.
- the heater 60 is brought into contact with the light control panel 4, the light transmission region 41 and the light shielding region 42 are obtained. Therefore, the work for obtaining the light transmission region 41 and the light shielding region 42 can be efficiently performed. it can.
- the light transmission regions 41 and 41 'and the light shielding regions 42 and 42' are formed using the heat sensitive layer 44, but may be formed of, for example, a pressure sensitive sheet.
- FIG. 10 is a block diagram of a display panel inspection apparatus according to the second embodiment of the present invention.
- the display panel inspection apparatus includes a bar code reader 207 that detects model information indicating the model of the liquid crystal display panel 1 ′. Thereby, the area of the light shielding region 42 can be automatically changed based on the model information detected by the barcode reader 207.
- the barcode reader 207 is an example of a model information detection unit.
- the display panel inspection apparatus includes a computer 205 to which a signal from the bar code reader 207 is input, and a heater drive unit 208.
- the heater driving unit 208 drives the first heater 6A, the second heater 6B, and the third heater 6C independently in the x-axis direction, the y-axis direction, and the z-axis direction.
- the computer 205 receives a signal from the barcode reader 207.
- the control device 252 of the computer 205 includes a backlight unit control unit 52a, an image display region control unit 52b, an inspection unit 52c, a heater temperature control unit 252d, and a heater drive unit control unit 252e.
- the heater temperature control unit 252d controls the temperatures of the flat surfaces in the first heater 6A, the second heater 6B, and the third heater 6C.
- the temperature of the flat surface can be set to a predetermined temperature.
- the heater drive unit controller 252e controls the driving of the first heater 6A, the second heater 6B, and the third heater 6C based on the model information from the barcode reader 207. For example, the heater drive unit controller 252e moves the first heater 6A, the second heater 6B, and the third heater 6C, as will be described with reference to FIG.
- the model information of the 70-type liquid crystal display panel 1 ′ is used.
- a sticker printed with a bar code indicating is attached in advance to a portion other than the image display area 11 of the 70-inch liquid crystal display panel 1 ′.
- the heat treatment corresponding to the model information is automatically performed on the thermal layer 44 of the light control panel 4. Is called. That is, the light transmission region 41 ′ and the light shielding region 42 ′ shown in FIG. 6 are automatically obtained. Therefore, a light blocking area for blocking light traveling toward the camera 3 through a space adjacent to the peripheral edge of the 70-type liquid crystal display panel 1 can be automatically set.
- FIG. 11 is a schematic diagram showing a schematic configuration of a main part of a display panel inspection apparatus according to a third embodiment of the present invention.
- the display panel inspection apparatus includes a liquid crystal shutter device 304 and a computer 305.
- the liquid crystal shutter device 304 is an example of a light control member and an example of an electro-optical unit.
- the liquid crystal shutter device 304 includes a plurality of liquid crystal shutters.
- Each liquid crystal shutter can transmit light from the image display area 11 to the camera 3.
- each liquid crystal shutter can be made opaque with respect to the light traveling toward the camera 3 through the periphery of the liquid crystal display panel 1 by changing the applied voltage.
- the control device 352 has an applied voltage changing unit 352f that changes the applied voltage of each liquid crystal shutter of the liquid crystal shutter device 304 based on a signal indicating an instruction from the inspector.
- the liquid crystal shutter device 304 changes from a state similar to the state of FIG. 3 to a state similar to the state of FIG. 6 or a state similar to the state of FIG. To a state similar to the state of FIG.
- the display panel inspection apparatus having the above configuration has the same effects as those of the first embodiment, and the applied voltage changing unit 352f changes the applied voltage of each liquid crystal shutter of the liquid crystal shutter device 304, whereby the liquid crystal shutter device.
- the shape and area of the light-shielding area 304 can be arbitrarily set.
- the area of the light-shielding region of the liquid crystal shutter device 304 is not changed without an instruction from the operator, but may be automatically changed without an instruction from the operator. .
- the area of the light shielding region 42 of the liquid crystal shutter device 304 may be automatically changed based on the model information from the barcode reader 207 of the second embodiment. That is, a combination of the descriptions in the second and third embodiments as appropriate may be an embodiment of the present invention.
- FIG. 12 is a schematic diagram showing a schematic configuration of a main part of the display panel inspection apparatus according to the fourth embodiment of the present invention.
- the display panel inspection apparatus includes a camera polarizing plate 410 disposed between the camera 3 and the light control panel 4, and a backlight polarizing plate disposed between the backlight unit 2 and the liquid crystal display panel 1. 420.
- the camera polarizing plate 410 is an example of an imaging device polarizing plate
- the backlight polarizing plate 420 is an example of a light source device polarizing plate.
- the absorption axis of the camera polarizing plate 410 is parallel to the absorption axis of the front polarizing plate 124 as shown in FIG. That is, the absorption axis of the camera polarizing plate 410 is parallel to the y-axis. In FIG. 13, the light control panel 4 is not shown.
- the backlight polarizing plate 420 for example, the front surface (the surface on the rear polarizing plate 114 side) and the rear surface (the surface opposite to the rear polarizing plate 114 side) are the same size as the front surface of the backlight unit 2. The entire front surface of the backlight unit 2 is covered. The rear surface of the backlight polarizing plate 420 is in contact with the front surface of the backlight unit 2. The absorption axis of the backlight polarizing plate 420 is parallel to the absorption axis of the rear polarizing plate 114. That is, the absorption axis of the backlight polarizing plate 420 is parallel to the z-axis.
- the backlight polarizing plate 420 may be larger than the front surface of the backlight unit 2. Further, the backlight polarizing plate 420 may be disposed at a predetermined interval from the front surface of the backlight unit 2.
- the camera polarizing plate 410 is disposed between the camera 3 and the light control panel 4, and the backlight polarizing plate 420 is disposed between the backlight unit 2 and the liquid crystal display panel 1.
- the image display area 11 is imaged. Thereby, only the light that has passed through the backlight polarizing plate 420 out of the light emitted from the backlight unit 2, that is, only the light in the vibration direction orthogonal to the absorption axis of the backlight polarizing plate 420 is displayed on the liquid crystal display. Go to panel 1.
- the polarizing plate 410 can prevent this. Since the light passing through the liquid crystal display panel 1 is twisted by 90 degrees in the vibration direction, the light emitted forward from the image display region 11 through the liquid crystal display panel 1 passes through the camera polarizing plate 410. Then enters the camera 3.
- An inspection apparatus for a display panel A display panel inspection apparatus for inspecting a display panel 1, 1 ′ having an image display area 11, An imaging device 3 that is disposed in front of the display panels 1 and 1 ′ and images the image display area 11; A light control member 4, 304 disposed between the display panel 1, 1 ′ and the imaging device 3;
- the light control members 4 and 304 are Light transmissive regions 41, 41 ′, 341 that transmit light emitted forward from the image display region 11, and Light-shielding regions 42, 42 ', and 342 that block light traveling forward through a space adjacent to the peripheral edge of the display panel 1, 1';
- the areas of the light shielding regions 42, 42 ′, and 342 can be arbitrarily changed in a state where the positions of the light control members 4 and 304 with respect to the display panels 1 and 1 ′ are maintained.
- the front of the display panels 1 and 1 ′ indicates a side where the user is present when the user views the image display area 11.
- the imaging device 3 captures the image display area 11
- the light traveling forward through the space adjacent to the peripheral edge of the display panel 1, 1 ′ is in the light shielding areas 42, 42 ′, 342. Since the light is blocked, it is possible to prevent the adverse effect due to the light from being captured on the image display region 11. Therefore, for example, unevenness correction of the image display area 11 can be performed satisfactorily based on the image display area 11 captured by the imaging device 3. That is, it is possible to avoid the above-described unevenness correction from being defective.
- the area of the light shielding regions 42, 42 'and 342 can be arbitrarily changed in a state where the position of the light control members 4 and 304 with respect to the display panels 1 and 1' is maintained.
- the other display panel 1, 1 ' can be obtained without moving the light control member 4, 304.
- the light that travels forward through the space adjacent to the peripheral edge can be blocked by the light blocking regions 42, 42 ′, and 342. Therefore, it is possible to inspect the display panels 1 and 1 ′ having various panel sizes, and it is possible to prevent a decrease in inspection efficiency.
- the heat-sensitive layer 44 when the heat-sensitive layer 44 is heated, the heat-sensitive layer 44 becomes opaque to the light. Therefore, the areas of the light shielding regions 42 and 42 'can be arbitrarily set by adjusting the area of the region to be heated.
- the light shielding region 342 is formed by an electro-optic unit 304 that becomes opaque to light traveling forward through the periphery of the display panels 1 and 1 ′ by changing the applied voltage.
- the area of the light shielding region 342 can be arbitrarily set by controlling the voltage applied to the electro-optical unit 304.
- a model information detection unit 207 that detects model information indicating the model of the display panel 1 or 1 ′; The areas of the light shielding regions 42, 42 ′ are automatically changed based on the model information detected by the model information detection unit 207.
- the inspection efficiency can be improved.
- An inspection apparatus for a display panel An imaging device polarizing plate 410 disposed between the light control members 4, 304 and the imaging device 3; A light source device 2 disposed behind the display panels 1 and 1 ′ and emitting light toward the display panels 1 and 1 ′; A polarizing plate 420 for a light source device disposed between the light source device 2 and the display panel 1, 1 ′, The display panels 1 and 1 ' A display panel body 100; A front polarizing plate 124 disposed in front of the display panel body 100; A rear polarizing plate 114 disposed behind the display panel body 100 and having an absorption axis orthogonal to the absorption axis of the front polarizing plate 124; The absorption axis of the imaging device polarizing plate 410 is parallel to the absorption axis of the front polarizing plate 124, The absorption axis of the polarizing plate 420 for the light source device is parallel to the absorption axis of the rear polarizing plate 114.
- the absorption axis of the imaging device polarizing plate 410 is parallel to the absorption axis of the front polarizing plate 124, and the absorption axis of the light source device polarizing plate 420 is the absorption of the rear polarizing plate 114. Since it is parallel to the axis, even if the light emitted from the polarizing plate 420 for the light source device passes through the periphery of the display panel 1, 1 ′ and travels toward the imaging device 3, the light enters the imaging device 3. Can be prevented by the polarizing plate 410 for the imaging device.
- An inspection method for a display panel includes: A display panel inspection method for inspecting a display panel 1, 1 ′ having an image display area 11, A light-transmitting region 41, 41 ', 341 that transmits light emitted forward from the image display region 11 and a light shield that blocks light traveling forward through a space adjacent to the peripheral edge of the display panel 1, 1'.
- Imaging the image display area 11 with the imaging device 3 The areas of the light shielding regions 42, 42 ′, and 342 can be arbitrarily changed in a state where the positions of the light control members 4 and 304 with respect to the display panels 1 and 1 ′ are maintained.
- the front of the display panels 1 and 1 ′ indicates a side where the user is present when the user views the image display area 11.
- the imaging device 3 captures the image display area 11
- the light traveling forward through the space adjacent to the peripheral edge of the display panel 1, 1 ′ is in the light shielding areas 42, 42 ′, 342. Since the light is blocked, it is possible to prevent the adverse effect due to the light from being captured on the image display region 11. Therefore, for example, unevenness correction of the image display area 11 can be performed satisfactorily based on the image display area 11 captured by the imaging device 3. That is, it is possible to avoid the above-described unevenness correction from being defective.
- the area of the light shielding regions 42, 42 'and 342 can be arbitrarily changed in a state where the position of the light control members 4 and 304 with respect to the display panels 1 and 1' is maintained.
- the other display panel 1, 1 ' can be obtained without moving the light control member 4, 304.
- the light that travels forward through the space adjacent to the peripheral edge can be blocked by the light blocking regions 42, 42 ′, and 342. Therefore, it is possible to inspect the display panels 1 and 1 ′ having various panel sizes, and it is possible to prevent a decrease in inspection efficiency.
- the light-shielding regions 42 and 42 ′ are formed by using the heat-sensitive layer 44 that is heated and becomes opaque to the light traveling forward through the periphery of the display panels 1 and 1 ′.
- the heat-sensitive layer 44 when the heat-sensitive layer 44 is heated, the heat-sensitive layer 44 becomes opaque to light traveling forward through the periphery of the display panels 1 and 1 ′. Therefore, the areas of the light shielding regions 42 and 42 'can be arbitrarily set by adjusting the area of the region to be heated.
- the light shielding region 342 is formed by using the electro-optic part 304 that becomes opaque to the light traveling forward through the periphery of the display panel 1, 1 ′.
- the electro-optical unit 304 when the applied voltage of the electro-optical unit 304 is changed, the electro-optical unit 304 becomes opaque with respect to the light. Therefore, the area of the light shielding region 342 can be arbitrarily set by controlling the applied voltage.
- model information indicating the model of the display panel 1, 1 ′ is detected by the model information detection unit 207, and light shielding is performed based on the model information detected by the model information detection unit 207.
- the areas 42 and 42 ' are automatically changed.
- the inspection efficiency can be improved.
- the display panels 1 and 1 ' A display panel body 100; A front polarizing plate 124 disposed in front of the display panel body 100; A rear polarizing plate 114 disposed behind the display panel body 100 and having an absorption axis orthogonal to the absorption axis of the front polarizing plate 124; An imaging device polarizing plate 410 having an absorption axis parallel to the absorption axis of the front polarizing plate 124 is disposed between the light control members 4 and 304 and the imaging device 3, and the rear polarizing plate 114 absorbs the light.
- the polarizing plate 420 for the light source device having an absorption axis parallel to the axis is disposed between the light source device 2 and the display panels 1 and 1 ′, the image display region 11 is imaged.
- the imaging device polarizing plate 410 is disposed between the light control members 4, 304 and the imaging device 3, and the light source device polarizing plate 420 is connected to the light source device 2 and the display panels 1, 1.
- the image display area 11 is imaged in a state where it is arranged between “and”. Therefore, even if the light emitted from the polarizing plate 420 for the light source device passes through the periphery of the display panel 1, 1 ′ and travels toward the imaging device 3, the light is incident on the imaging device 3 for the imaging device. This can be prevented by the polarizing plate 410.
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Abstract
A display panel inspection device for inspecting a display panel (1) that has an image display region (11), said display panel inspection device comprising: an imaging device (3) that is positioned in front of the display panel (1) and images the image display region (11); and a light control member (4) that is positioned between the display panel (1) and the imaging device (3). The light control member (4) has a light transmitting region (41) that transmits light emitted frontward from the image display region (11), and a light blocking region (42) that blocks light passing through a space and trending frontward, said space being adjacent to a peripheral section of the display panel (1). The area of the light blocking region (42) can be changed arbitrarily while the position of the light control member (4) with regard to the display panel (1) is maintained.
Description
この発明は、表示パネル用検査装置および表示パネル用検査方法に関する。
The present invention relates to a display panel inspection apparatus and a display panel inspection method.
表示パネルにおける点欠陥、線欠陥、班欠陥、色度欠陥等の欠陥は、検査員が検査ステージ上で駆動されている表示パネルを目視する目視検査や、検査ステージ上で駆動されている表示パネルをテレビカメラで撮像し、このテレビカメラから出力されて表示パネルの画像を示す出力信号をコンピュータで処理して自動検査によって検出されることが知られている。
Defects such as point defects, line defects, group defects, and chromaticity defects in the display panel are visually inspected by the inspector to view the display panel driven on the inspection stage, or the display panel driven on the inspection stage. Is captured by a television camera, and an output signal output from the television camera and indicating an image on the display panel is processed by a computer and detected by automatic inspection.
従来、自動検査で使用される表示パネル用検査装置としては、特許文献1(特開平8-220014号公報)に開示されたものがある。この表示パネル用検査装置は、LCD(液晶ディスプレイ)パネル下に配置され、LCDパネルの下面に沿って移動可能なライン光源と、LCDパネル上に配置され、CCD(電荷結合素子)を有するラインセンサとを備えている。また、ラインセンサは、上下方向においてライン光源と重なる位置にあり、ライン光源の移動と同期して移動可能に設けられている。
Conventionally, as an inspection apparatus for a display panel used in automatic inspection, there is one disclosed in Patent Document 1 (Japanese Patent Laid-Open No. Hei 8-222014). This inspection apparatus for a display panel is arranged below a LCD (liquid crystal display) panel, a line light source movable along the lower surface of the LCD panel, and a line sensor arranged on the LCD panel and having a CCD (charge coupled device) And. Further, the line sensor is positioned so as to overlap the line light source in the vertical direction, and is provided so as to be movable in synchronization with the movement of the line light source.
上記構成の表示パネル用検査装置が、LCDパネルを検査する場合、点灯状態のライン光源をLCDパネルの下面に沿って移動させて、ライン光源の光をLCDパネルの下面の各部に順次照射する。このとき、ラインセンサがライン光源の移動と同期して移動し、ラインセンサのCCDがLCDパネルから出る光を受光する。すなわち、LCDパネルの上面の各部を順次撮像する。その結果、LCDパネルの上面の各部の画像を示す信号がラインセンサからデータ処理部に出力されて、データ処理部がLCDパネルの欠陥画素を検出し、モニタが欠陥画素の検出結果を表示する。
When the inspection device for a display panel having the above-described configuration inspects the LCD panel, the line light source in the lit state is moved along the lower surface of the LCD panel, and the light from the line light source is sequentially applied to each portion of the lower surface of the LCD panel. At this time, the line sensor moves in synchronization with the movement of the line light source, and the CCD of the line sensor receives the light emitted from the LCD panel. That is, each part of the upper surface of the LCD panel is sequentially imaged. As a result, a signal indicating an image of each part on the upper surface of the LCD panel is output from the line sensor to the data processing unit, the data processing unit detects the defective pixel of the LCD panel, and the monitor displays the detection result of the defective pixel.
ところで、上記LCDパネルの上面の各部を順次撮像するとき、LCDパネルを経由しないでLCDパネルを取り囲む領域を経由した光がCCDに入射すると、検査結果が不正確になる恐れがある。
By the way, when each part of the upper surface of the LCD panel is sequentially imaged, if the light passing through the area surrounding the LCD panel without passing through the LCD panel enters the CCD, the inspection result may be inaccurate.
そこで、上記検査結果が不正確になるのを防ぐ方法としては、LCDパネルの周囲の空間上に、ライン光源の光を透過しない遮光部材を配置することにより、その空間からCCDに光を出射させないようにする方法が考えられる。
Therefore, as a method for preventing the above inspection result from becoming inaccurate, a light-shielding member that does not transmit the light from the line light source is disposed on the space around the LCD panel so that light is not emitted from the space to the CCD. A way to do this is conceivable.
しかしながら、上記方法では、例えば、70型のLCDパネルの検査後、60型のLCDパネルを検査しようとすると、遮光部材をより大きな遮光部材に交換するか、遮光部材を追加するかしなければならない。
However, in the above method, for example, when a 60-inch LCD panel is to be inspected after a 70-type LCD panel is inspected, the light-shielding member must be replaced with a larger light-shielding member or a light-shielding member must be added. .
したがって、上記方法には、表示パネルのパネルサイズが変更されると、遮光部材の交換または追加が行われるため、検査効率が低下してしまうという問題がある。
Therefore, the above method has a problem that when the panel size of the display panel is changed, the light shielding member is exchanged or added, so that the inspection efficiency is lowered.
そこで、この発明の課題は、様々なパネルサイズの表示パネルを検査することができると共に、検査効率の低下を防ぐことができる表示パネル用検査装置および表示パネル用検査方法を提供することにある。
Therefore, an object of the present invention is to provide a display panel inspection apparatus and a display panel inspection method capable of inspecting display panels having various panel sizes and preventing a decrease in inspection efficiency.
この発明の一態様に係る表示パネル用検査装置は、
画像表示領域を有する表示パネルを検査するための表示パネル用検査装置であって、
上記表示パネルの前方に配置され、上記画像表示領域を撮像する撮像装置と、
上記表示パネルと上記撮像装置との間に配置された光制御部材と
を備え、
上記光制御部材は、
上記画像表示領域から前方に出射された光を透過する光透過領域と、
上記表示パネルの周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域と
を有し、
上記遮光領域の面積は、上記表示パネルに対する上記光制御部材の位置を保持した状態で、任意に変更可能である。 An inspection apparatus for a display panel according to one aspect of the present invention,
A display panel inspection apparatus for inspecting a display panel having an image display area,
An imaging device disposed in front of the display panel and imaging the image display area;
A light control member disposed between the display panel and the imaging device;
The light control member is
A light transmission region that transmits light emitted forward from the image display region;
A light shielding region that blocks light traveling forward through a space adjacent to the peripheral edge of the display panel,
The area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held.
画像表示領域を有する表示パネルを検査するための表示パネル用検査装置であって、
上記表示パネルの前方に配置され、上記画像表示領域を撮像する撮像装置と、
上記表示パネルと上記撮像装置との間に配置された光制御部材と
を備え、
上記光制御部材は、
上記画像表示領域から前方に出射された光を透過する光透過領域と、
上記表示パネルの周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域と
を有し、
上記遮光領域の面積は、上記表示パネルに対する上記光制御部材の位置を保持した状態で、任意に変更可能である。 An inspection apparatus for a display panel according to one aspect of the present invention,
A display panel inspection apparatus for inspecting a display panel having an image display area,
An imaging device disposed in front of the display panel and imaging the image display area;
A light control member disposed between the display panel and the imaging device;
The light control member is
A light transmission region that transmits light emitted forward from the image display region;
A light shielding region that blocks light traveling forward through a space adjacent to the peripheral edge of the display panel,
The area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held.
この発明の一態様に係る表示パネル用検査方法は、
画像表示領域を有する表示パネルを検査するための表示パネル用検査方法であって、
上記画像表示領域から前方に出射された光を透過する光透過領域と、上記表示パネルの周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域とを有する光制御部材を、上記表示パネルと撮像装置との間に配置する工程と、
上記光制御部材の配置後、上記表示パネルの後方に配置された光源装置に上記表示パネルに向かって光を出射させた状態で、上記表示パネルの上記画像表示領域を上記撮像装置で撮像する工程と
を備え、
上記遮光領域の面積は、上記表示パネルに対する上記光制御部材の位置を保持した状態で、任意に変更可能である。 An inspection method for a display panel according to an aspect of the present invention includes:
An inspection method for a display panel for inspecting a display panel having an image display area,
A light control member having a light transmission region that transmits light emitted forward from the image display region and a light shielding region that blocks light traveling forward through a space adjacent to a peripheral edge of the display panel; Placing between the panel and the imaging device;
After the arrangement of the light control member, a step of imaging the image display area of the display panel with the imaging device in a state where light is emitted toward the display panel from a light source device arranged behind the display panel. And
The area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held.
画像表示領域を有する表示パネルを検査するための表示パネル用検査方法であって、
上記画像表示領域から前方に出射された光を透過する光透過領域と、上記表示パネルの周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域とを有する光制御部材を、上記表示パネルと撮像装置との間に配置する工程と、
上記光制御部材の配置後、上記表示パネルの後方に配置された光源装置に上記表示パネルに向かって光を出射させた状態で、上記表示パネルの上記画像表示領域を上記撮像装置で撮像する工程と
を備え、
上記遮光領域の面積は、上記表示パネルに対する上記光制御部材の位置を保持した状態で、任意に変更可能である。 An inspection method for a display panel according to an aspect of the present invention includes:
An inspection method for a display panel for inspecting a display panel having an image display area,
A light control member having a light transmission region that transmits light emitted forward from the image display region and a light shielding region that blocks light traveling forward through a space adjacent to a peripheral edge of the display panel; Placing between the panel and the imaging device;
After the arrangement of the light control member, a step of imaging the image display area of the display panel with the imaging device in a state where light is emitted toward the display panel from a light source device arranged behind the display panel. And
The area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held.
この発明の表示パネル用検査装置および表示パネル用検査方法は、様々なパネルサイズの表示パネルを検査することができると共に、検査効率の低下を防ぐことができる。
The display panel inspection apparatus and display panel inspection method of the present invention can inspect display panels of various panel sizes and can prevent a decrease in inspection efficiency.
以下、この発明の表示パネル用検査装置および表示パネル用検査方法を図示の実施の形態により詳細に説明する。なお、図面において、同一の参照番号は、同一部分または相当部分を表わすものである。また、図面において、x軸は液晶表示パネルの厚さ方向、y軸は液晶パネルの画面の水平方向、z軸は液晶パネルの画面の鉛直方向に対応している。
Hereinafter, the display panel inspection apparatus and the display panel inspection method of the present invention will be described in detail with reference to the illustrated embodiments. In the drawings, the same reference numerals represent the same or corresponding parts. In the drawings, the x axis corresponds to the thickness direction of the liquid crystal display panel, the y axis corresponds to the horizontal direction of the screen of the liquid crystal panel, and the z axis corresponds to the vertical direction of the screen of the liquid crystal panel.
〔第1実施形態〕
図1は、この発明の第1実施形態の表示パネル用検査装置の主要部の概略構成を示す模式図である。 [First Embodiment]
FIG. 1 is a schematic diagram showing a schematic configuration of a main part of a display panel inspection apparatus according to a first embodiment of the present invention.
図1は、この発明の第1実施形態の表示パネル用検査装置の主要部の概略構成を示す模式図である。 [First Embodiment]
FIG. 1 is a schematic diagram showing a schematic configuration of a main part of a display panel inspection apparatus according to a first embodiment of the present invention.
上記表示パネル用検査装置は、例えば80型,70型の液晶表示パネル1,1’を検査するための表示パネル用検査装置であって、バックライトユニット2と、撮像装置の一例としてのカメラ3と、光制御部材の一例としての光制御パネル4と、コンピュータ5とを備える。すなわち、上記表示パネル用検査装置は、80型,70型の液晶表示パネル1,1’を順次検査することが可能に構成されている。なお、70型の液晶表示パネル1’およびこれの構成部(画像表示領域11’およびブラックマトリクス12’)は、図7に示している。また、80型,70型の液晶表示パネル1,1’は表示パネルの一例である。
The display panel inspection device is a display panel inspection device for inspecting, for example, 80-type and 70-type liquid crystal display panels 1, 1 ′, and includes a backlight unit 2 and a camera 3 as an example of an imaging device. And a light control panel 4 as an example of a light control member, and a computer 5. That is, the display panel inspection apparatus is configured to sequentially inspect the 80-type and 70-type liquid crystal display panels 1 and 1 '. A 70-type liquid crystal display panel 1 ′ and components thereof (image display area 11 ′ and black matrix 12 ′) are shown in FIG. 7. The 80-type and 70-type liquid crystal display panels 1 and 1 ′ are examples of display panels.
カメラ3は、液晶表示パネル1の前方に配置されている。このカメラ3は、80型の液晶表示パネル1の画像表示領域11を撮像して、この撮像結果を示す信号を出力する。より詳しくは、カメラ3は、例えばCCD(Charged-coupled devices)、CMOS(Complementary metal-oxide-semiconductor)などの撮像素子31を有し、画像表示領域11から前方に出射された光を受光する。このとき、上記光に応じた信号が生成されてコンピュータ5に出力される。
The camera 3 is disposed in front of the liquid crystal display panel 1. The camera 3 images the image display area 11 of the 80-inch liquid crystal display panel 1 and outputs a signal indicating the imaging result. More specifically, the camera 3 includes an image sensor 31 such as a CCD (Charged-coupled device) or a CMOS (Complementary metal-oxide-semiconductor), and receives light emitted forward from the image display region 11. At this time, a signal corresponding to the light is generated and output to the computer 5.
バックライトユニット2は、液晶表示パネル1の後方に配置されている。このバックライトユニット2は、電源ユニット(図示せず)から電源の供給を受けて、前面が発光する。すなわち、バックライトユニット2の前面は、80型の液晶表示パネル1に向かって光を出射するようになっている。より詳しくは、バックライトユニット2は、例えば7000cd~2200cdの範囲内で明るさ調整が可能であると共に、80型の液晶表示パネル1の後面(カメラ3側とは反対側の面)をムラ無く照らすことが可能である。
The backlight unit 2 is arranged behind the liquid crystal display panel 1. The backlight unit 2 receives power from a power supply unit (not shown) and emits light on the front surface. That is, the front surface of the backlight unit 2 emits light toward the 80-inch liquid crystal display panel 1. More specifically, the backlight unit 2 can adjust the brightness within a range of, for example, 7000 cd to 2200 cd, and the back surface of the 80-type liquid crystal display panel 1 (surface opposite to the camera 3 side) is uniform. It is possible to illuminate.
80型の液晶表示パネル1は画像表示領域11を前面(光制御パネル4側の表面)に有する。この画像表示領域11は、それぞれ、映像信号に対応する画像を表示させるための領域である。また、画像表示領域11は、映像信号に対応する画像を表示しないブラックマトリクス12で取り込まれている。すなわち、80型の液晶表示パネル1の前面の周縁部にブラックマトリクス12が形成されている。
The 80-inch liquid crystal display panel 1 has an image display area 11 on the front surface (surface on the light control panel 4 side). Each of the image display areas 11 is an area for displaying an image corresponding to the video signal. The image display area 11 is captured by a black matrix 12 that does not display an image corresponding to the video signal. That is, the black matrix 12 is formed on the peripheral edge of the front surface of the 80-type liquid crystal display panel 1.
光制御パネル4は、80型の液晶表示パネル1とカメラ3との間に配置される。この光制御パネル4は、画像表示領域11から前方に出射された光を透過する光透過領域41と、80型の液晶表示パネル1の周縁部に隣接する空間を通ってカメラ3に向かう光を遮る遮光領域42とを有する。この遮光領域42の面積を調整するとき、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cが使用される。
The light control panel 4 is disposed between the 80-inch liquid crystal display panel 1 and the camera 3. The light control panel 4 transmits light directed to the camera 3 through a light transmission region 41 that transmits light emitted forward from the image display region 11 and a space adjacent to the peripheral edge of the 80-type liquid crystal display panel 1. And a light shielding region 42 for shielding. When adjusting the area of the light shielding region 42, the first heater 6A, the second heater 6B, and the third heater 6C are used.
第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cは、それぞれ、螺旋状のニクロム線(図示せず)を内部に有している。このニクロム線に電流を流すため、ニクロム線は電源に接続されている。また、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cのそれぞれには、光制御パネル4に接触させる平坦面が設けられている。なお、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cは、それぞれ、金属発熱体の一例としてのニクロム線を内部に有していたが、他の金属発熱体(例えば鉄クロム線)を内部に有してもよい。また、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cのうちの少なくとも1つが、セラミック発熱体を内部に有するようにしてもよい。また、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cは、画像表示領域11の撮像時、光制御パネル4とカメラ3との間に位置させない。
The first heater 6A, the second heater 6B, and the third heater 6C each have a spiral nichrome wire (not shown) inside. The nichrome wire is connected to a power source in order to pass a current through the nichrome wire. Each of the first heater 6A, the second heater 6B, and the third heater 6C is provided with a flat surface that is brought into contact with the light control panel 4. The first heater 6A, the second heater 6B, and the third heater 6C each have a nichrome wire as an example of a metal heating element, but other metal heating elements (for example, an iron chrome wire) are included therein. You may have inside. Further, at least one of the first heater 6A, the second heater 6B, and the third heater 6C may have a ceramic heating element therein. Further, the first heater 6A, the second heater 6B, and the third heater 6C are not positioned between the light control panel 4 and the camera 3 when the image display area 11 is imaged.
コンピュータ5は、カメラ3の撮像画像、検査結果などを表示するモニタ51と、CPU(中央処理装置)、メモリ、入出力回路などから構成された制御装置52とを備えている。
The computer 5 includes a monitor 51 that displays images captured by the camera 3, inspection results, and the like, and a control device 52 that includes a CPU (Central Processing Unit), a memory, an input / output circuit, and the like.
制御装置52は、バックライトユニット2および80型の液晶表示パネル1を制御するため、バックライトユニット2および80型の液晶表示パネル1に制御信号を送出する。より詳しくは、制御装置52は、バックライトユニット2の点灯および非点灯を制御するバックライトユニット制御部52aと、80型の液晶表示パネル1の画像表示領域11に検査用画像を表示させるための画像表示領域制御部52bと、カメラ3からの信号に基づいて、画像表示領域11内におけるムラ、黒点、白点などのいわゆる表示品位不良の有無を検査する検査部52cとを有している。この検査部52cが出す検査結果はモニタ51に表示されるようになっている。なお、制御装置52は、80型の液晶表示パネル1と同様に、70型の液晶表示パネル1の表示品位不良の有無を検査可能に構成されている。
The control device 52 sends a control signal to the backlight unit 2 and the 80 type liquid crystal display panel 1 in order to control the backlight unit 2 and the 80 type liquid crystal display panel 1. More specifically, the control device 52 displays a test image on the backlight unit control unit 52a that controls lighting and non-lighting of the backlight unit 2 and the image display area 11 of the 80-inch liquid crystal display panel 1. An image display area control unit 52b and an inspection unit 52c for inspecting the presence or absence of so-called display quality defects such as unevenness, black spots, and white spots in the image display area 11 based on a signal from the camera 3 are provided. The inspection result output by the inspection unit 52c is displayed on the monitor 51. The control device 52 is configured to be capable of inspecting whether or not the display quality of the 70-type liquid crystal display panel 1 is poor, like the 80-type liquid crystal display panel 1.
図2は、80型の液晶表示パネル1の模式断面である。
FIG. 2 is a schematic cross section of an 80-inch liquid crystal display panel 1.
液晶表示パネル1は、表示パネル本体100と、表示パネル本体100の前方に配置された前側偏光板124と、表示パネル本体100の後方に配置された後側偏光板114とを備えている。
The liquid crystal display panel 1 includes a display panel main body 100, a front polarizing plate 124 disposed in front of the display panel main body 100, and a rear polarizing plate 114 disposed in the rear of the display panel main body 100.
より詳しくは、表示パネル本体100は、後側偏光板114側に第1ガラス基板101を有する一方、前側偏光板124側に第2ガラス基板102を有する。この第1ガラス基板101と第2ガラス基板102の間には液晶層103が設けられている。また、第1ガラス基板101と第2ガラス基板102の間には、液晶層103に封入される液晶を封止するためのシール材131が、第2ガラス基板102の周縁部に沿って設けられている。
More specifically, the display panel body 100 has the first glass substrate 101 on the rear polarizing plate 114 side, and the second glass substrate 102 on the front polarizing plate 124 side. A liquid crystal layer 103 is provided between the first glass substrate 101 and the second glass substrate 102. A sealing material 131 for sealing the liquid crystal sealed in the liquid crystal layer 103 is provided between the first glass substrate 101 and the second glass substrate 102 along the peripheral edge of the second glass substrate 102. ing.
第1ガラス基板101の上面(第2ガラス基板102側の表面)上には、複数のTFT(薄膜トランジスタ)111,111,・・・と、各TFT111に接続される表示画素の画素電極112とが形成されている。このTFT111および画素電極112上には、配向膜113が積層されている。一方、第1ガラス基板101の下面には、後側偏光板114が貼り付けられている。また、第1ガラス基板101の上面の周縁部上には、供給回路基板115が設置されている。
On the upper surface of the first glass substrate 101 (the surface on the second glass substrate 102 side), a plurality of TFTs (thin film transistors) 111, 111,... And pixel electrodes 112 of display pixels connected to the respective TFTs 111 are provided. Is formed. An alignment film 113 is stacked on the TFT 111 and the pixel electrode 112. On the other hand, a rear polarizing plate 114 is attached to the lower surface of the first glass substrate 101. A supply circuit board 115 is installed on the peripheral edge of the upper surface of the first glass substrate 101.
供給回路基板115は、複数の走査信号配線(図示せず)を介して、各行のTFT111に順次操作信号を供給する。
The supply circuit board 115 sequentially supplies operation signals to the TFTs 111 in each row via a plurality of scanning signal wirings (not shown).
第2ガラス基板102の下面(第1ガラス基板101側の表面)下には、カラーフィルタ層121が形成されている。このカラーフィルタ層121は、赤色カラーフィルタ121A、緑色カラーフィルタ121Bおよび青色カラーフィルタ121Cをそれぞれ複数有する。各赤色カラーフィルタ121A、各緑色カラーフィルタ121Bおよび各青色カラーフィルタ121Cは、赤色サブ画素、緑色サブ画素および青色サブ画素に対応する。また、カラーフィルタ層121下には、対向電極122および配向膜123が積層されている。一方、第2ガラス基板102の上面には、前側偏光板124が貼り付けられている。
A color filter layer 121 is formed under the lower surface of the second glass substrate 102 (the surface on the first glass substrate 101 side). The color filter layer 121 includes a plurality of red color filters 121A, green color filters 121B, and blue color filters 121C. Each red color filter 121A, each green color filter 121B, and each blue color filter 121C correspond to a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Further, a counter electrode 122 and an alignment film 123 are stacked under the color filter layer 121. On the other hand, a front polarizing plate 124 is attached to the upper surface of the second glass substrate 102.
後側偏光板114および前側偏光板124は、後側偏光板114の吸収軸と前側偏光板124の吸収軸とは互いに直交するように、形成および配置されている。別の言い方をすれば、後側偏光板114はz軸と平行な吸収軸を有する一方、前側偏光板124はy軸に平行な吸収軸を有する。
The rear polarizing plate 114 and the front polarizing plate 124 are formed and arranged so that the absorption axis of the rear polarizing plate 114 and the absorption axis of the front polarizing plate 124 are orthogonal to each other. In other words, the rear polarizing plate 114 has an absorption axis parallel to the z axis, while the front polarizing plate 124 has an absorption axis parallel to the y axis.
画素電極112および対向電極122は、それぞれ、例えばITO(Indium Tin Oxide)からなる透明電極である。
The pixel electrode 112 and the counter electrode 122 are transparent electrodes made of, for example, ITO (Indium Tin Oxide).
図示しないが、第1ガラス基板101の上面の周縁部上には、画素電極112にデータ信号を供給するための供給回路基板も設置されている。また、70型の液晶表示パネル1’の内部構造は、80型の液晶表示パネル1の内部構造と同じである。
Although not shown, a supply circuit board for supplying a data signal to the pixel electrode 112 is also installed on the peripheral edge of the upper surface of the first glass substrate 101. The internal structure of the 70-type liquid crystal display panel 1 ′ is the same as the internal structure of the 80-type liquid crystal display panel 1.
図3は、光制御パネル4を前側から見た模式斜視図である。
FIG. 3 is a schematic perspective view of the light control panel 4 as viewed from the front side.
光制御パネル4は、画像表示領域11から前方に出射された光を透過する板部材43(例えばガラス板)を用いて形成されている。
The light control panel 4 is formed using a plate member 43 (for example, a glass plate) that transmits light emitted forward from the image display region 11.
より詳しくは、例えばロイコ染料および顕色材を含んだ感熱剤を用いて、感熱層44が板部材43の前面上に形成されている。この感熱層44において、加熱されて発色した部分が遮光領域42である。また、感熱層44において、加熱されかった部分が光透過領域41である。また、光透過領域41および遮光領域42は、光透過領域41のy軸方向,z軸方向の長さが80型の液晶表示パネル1の画像表示領域11のy軸方向,z軸方向の長さよりも短くならならないように形成される。なお、上記感熱剤の一部の加熱は、例えば、検査員が第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cで行ってもよいし、他の装置で行ってもよい。
More specifically, the heat-sensitive layer 44 is formed on the front surface of the plate member 43 using, for example, a heat-sensitive agent containing a leuco dye and a developer. In the heat-sensitive layer 44, a portion colored by heating is a light shielding region 42. Further, in the heat-sensitive layer 44, the portion that is not heated is the light transmission region 41. The light transmission region 41 and the light shielding region 42 are the lengths of the light transmission region 41 in the y-axis direction and the z-axis direction of the image display region 11 of the liquid crystal display panel 1 whose length in the y-axis direction and the z-axis direction is 80 type. It is formed so as not to be shorter. In addition, for example, the inspector may perform heating of part of the heat-sensitive agent by the first heater 6A, the second heater 6B, and the third heater 6C, or may be performed by another device.
上記感熱層44は、加熱前、画像表示領域11から前方に出射された光と対して透明であり、かつ、液晶表示パネル1の周囲を通ってカメラ3に向かう光に対して透明であるが、加熱されると発色し、液晶表示パネル1の周囲を通ってカメラ3に向かう光に対して不透明になる。なお、上記感熱剤の加熱後の色は、液晶表示パネル1の周囲を通ってカメラ3に向かう光に対して不透明な色であれば、特に限定されないが、画像表示領域11の画像との区別を容易にする観点上、例えば黒が好ましい。
The heat-sensitive layer 44 is transparent to light emitted forward from the image display region 11 before heating, and is transparent to light traveling toward the camera 3 through the periphery of the liquid crystal display panel 1. When it is heated, it develops color and becomes opaque to the light traveling through the periphery of the liquid crystal display panel 1 toward the camera 3. The color of the heat-sensitive agent after heating is not particularly limited as long as it is an opaque color with respect to the light traveling toward the camera 3 through the periphery of the liquid crystal display panel 1, but is distinguished from the image in the image display region 11. From the viewpoint of facilitating the process, for example, black is preferable.
上記構成の表示パネル用検査装置を用いて、80型,70型の液晶表示パネル1,1’を順次検査する場合、次のようにする。
When the 80-type and 70-type liquid crystal display panels 1 and 1 'are sequentially inspected using the display panel inspection apparatus having the above configuration, the following is performed.
まず、80型の液晶表示パネル1の位置および姿勢を固定するため、測定台(図示せず)の上面の溝に液晶表示パネル1の下部を嵌合させて、測定台上に液晶表示パネル1を設置する。これにより、液晶表示パネル1の後面がバックライトユニット2の前面に対向する。なお、上記測定台に対する80型,70型の液晶表示パネル1,1’の位置を決めるための目印が、上記測定台に付けられている。
First, in order to fix the position and orientation of the 80-inch liquid crystal display panel 1, the lower part of the liquid crystal display panel 1 is fitted into a groove on the upper surface of a measurement table (not shown), and the liquid crystal display panel 1 is placed on the measurement table. Is installed. Thereby, the rear surface of the liquid crystal display panel 1 faces the front surface of the backlight unit 2. A mark for determining the positions of the 80-type and 70-type liquid crystal display panels 1 and 1 'with respect to the measurement table is attached to the measurement table.
次に、図4に示すように、遮光領域42の内縁がブラックマトリクス12に対向するように、液晶表示パネル1の前方に光制御パネル4を配置する。例えば、遮光領域42の内縁が、ブラックマトリクス12の幅方向の中心を通る線と重なるように、光制御パネル4を配置する。なお、遮光領域42の内縁は、ブラックマトリクス12の幅方向の中心を通る線の近傍の部分と重なってもよい。また、液晶表示パネル1下の領域を通ってカメラ3に向かう光は測定台で遮光される。
Next, as shown in FIG. 4, the light control panel 4 is arranged in front of the liquid crystal display panel 1 so that the inner edge of the light shielding region 42 faces the black matrix 12. For example, the light control panel 4 is arranged so that the inner edge of the light shielding region 42 overlaps with a line passing through the center of the black matrix 12 in the width direction. The inner edge of the light shielding region 42 may overlap with a portion in the vicinity of a line passing through the center of the black matrix 12 in the width direction. Further, the light traveling toward the camera 3 through the area under the liquid crystal display panel 1 is blocked by the measurement table.
次に、バックライトユニット2を点灯させて、画像表示領域11に検査用画像を表示させた後、画像表示領域11を光透過領域41を介してカメラ3で撮像する。これにより、80型の液晶表示パネル1の表示品位の良否がモニタ51に表示される。
Next, after the backlight unit 2 is turned on to display an inspection image in the image display area 11, the image display area 11 is imaged by the camera 3 through the light transmission area 41. Thereby, the quality of the display quality of the 80-inch liquid crystal display panel 1 is displayed on the monitor 51.
次に、上記測定台から80型の液晶表示パネル1を降ろして、80型の液晶表示パネル1のときと同様に、上記測定台上に70型の液晶表示パネル1’を設置する。
Next, the 80-inch liquid crystal display panel 1 is lowered from the measurement table, and the 70-type liquid crystal display panel 1 ′ is installed on the measurement table in the same manner as the 80-type liquid crystal display panel 1.
次に、図5に示すように、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cの平坦面の温度を所定温度まで上げた後、光透過領域41の遮光領域42と隣り合う部分に、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cの平坦面をそれぞれ接触させる。このような作業を複数回行うことにより、図6に示すように、70型の液晶表示パネルを検査するための遮光領域42’および光透過領域41’を有する光制御パネル4’が得られる。このとき、光制御パネル4’と液晶表示パネルとの関係は、図7に示すようになる。なお、光透過領域41の遮光領域42と隣り合う部分に、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cの平坦面を接触させた後、その平坦面の温度を所定温度まで上げてもよい。
Next, as shown in FIG. 5, the temperature of the flat surfaces of the first heater 6 </ b> A, the second heater 6 </ b> B, and the third heater 6 </ b> C is increased to a predetermined temperature, and then the light transmission region 41 is adjacent to the light shielding region 42. The flat surfaces of the first heater 6A, the second heater 6B, and the third heater 6C are brought into contact with each other. By performing such an operation a plurality of times, as shown in FIG. 6, a light control panel 4 'having a light shielding region 42' and a light transmission region 41 'for inspecting a 70-type liquid crystal display panel is obtained. At this time, the relationship between the light control panel 4 'and the liquid crystal display panel is as shown in FIG. The flat surfaces of the first heater 6A, the second heater 6B, and the third heater 6C are brought into contact with the portion of the light transmission region 41 adjacent to the light shielding region 42, and then the temperature of the flat surfaces is raised to a predetermined temperature. Also good.
最後に、バックライトユニット2を点灯させて、画像表示領域11’に検査用画像を表示させた後、画像表示領域11’を光透過領域41’を介してカメラ3で撮像する。これにより、70型の液晶表示パネル1’の表示品位の良否がモニタ51に表示される。
Finally, the backlight unit 2 is turned on to display an inspection image in the image display area 11 ′, and then the image display area 11 ′ is captured by the camera 3 through the light transmission area 41 ′. As a result, the quality of the display quality of the 70-inch liquid crystal display panel 1 ′ is displayed on the monitor 51.
このように、遮光領域42,42’の内縁がブラックマトリクス12,12’に対向するので、液晶表示パネル1,1’の周縁部に隣接する空間を通ってカメラ3に向かう光が遮光領域42,42’で遮ることができる。これにより、上記光による悪影響が画像表示領域11の撮像に及ぶのを防ぐことができる。その結果、検査部52cは液晶表示パネル1を正確に検査することができる。したがって、検査部52cの検査結果に基づいて、表示領域の例えばムラ補正を的確に行うことができる。
Thus, since the inner edges of the light shielding regions 42, 42 'face the black matrices 12, 12', the light traveling toward the camera 3 through the space adjacent to the peripheral edge of the liquid crystal display panel 1, 1 'is blocked by the light shielding region 42. , 42 '. Thereby, it is possible to prevent the adverse effect due to the light from being captured on the image display area 11. As a result, the inspection unit 52c can accurately inspect the liquid crystal display panel 1. Therefore, for example, unevenness correction of the display area can be accurately performed based on the inspection result of the inspection unit 52c.
また、80型の液晶表示パネル1に対する光制御パネル4の位置を保持した状態で、遮光領域42の面積は任意に変更可能である。これにより、70型の液晶表示パネル1’の検査時における光制御パネル4’の位置が、80型の液晶表示パネル1の検査時における光制御パネル4の位置と同じでも、70型の液晶表示パネル1の周縁部に隣接する空間を通ってカメラ3に向かう光を遮光領域42’で遮ることができる。したがって、様々なパネルサイズの液晶表示パネル1を検査することができると共に、検査効率の低下を防ぐことができる。
Further, the area of the light shielding region 42 can be arbitrarily changed in a state where the position of the light control panel 4 with respect to the 80-inch liquid crystal display panel 1 is maintained. Thereby, even if the position of the light control panel 4 ′ at the time of inspection of the 70-inch liquid crystal display panel 1 ′ is the same as the position of the light control panel 4 at the time of inspection of the 80-inch liquid crystal display panel 1, Light directed to the camera 3 through a space adjacent to the peripheral edge of the panel 1 can be blocked by the light blocking region 42 '. Therefore, the liquid crystal display panel 1 having various panel sizes can be inspected, and a decrease in inspection efficiency can be prevented.
また、光制御パネル4の感熱層44は、加熱されたとき、液晶表示パネル1の周縁部に隣接する空間を通ってカメラ3に向かう光に対して不透明となる。したがって、上記加熱の対象となる領域の面積を調整することにより、遮光領域42の面積を任意に設定することができる。
Further, when the heat-sensitive layer 44 of the light control panel 4 is heated, the heat-sensitive layer 44 becomes opaque to light traveling toward the camera 3 through a space adjacent to the peripheral edge of the liquid crystal display panel 1. Therefore, the area of the light shielding region 42 can be arbitrarily set by adjusting the area of the region to be heated.
上記第1実施形態では、表示パネル用検査装置はバックライトユニット2を備えていたが、液晶表示パネル1,1’が光源を有しているのであれば、バックライトユニット2を備えなくてもよい。すなわち、バックライトユニット2の換わりに、液晶表示パネル1,1’に設けられた光源を用いてもよい。
In the first embodiment, the display panel inspection apparatus includes the backlight unit 2. However, if the liquid crystal display panels 1 and 1 ′ have a light source, the backlight unit 2 may be omitted. Good. That is, instead of the backlight unit 2, a light source provided in the liquid crystal display panels 1 and 1 'may be used.
上記第1実施形態では、80型,70型の液晶表示パネル1,1’を検査していたが、80型,70型の液晶表示パネル1,1’とは異なるサイズの液晶表示パネルを検査してもよい。
In the first embodiment, the 80-type and 70-type liquid crystal display panels 1 and 1 ′ are inspected. However, the liquid crystal display panel having a size different from that of the 80-type and 70-type liquid crystal display panels 1 and 1 ′ is inspected. May be.
上記第1実施形態では、80型の液晶表示パネル1の検査時の位置で光制御パネル4の一部を加熱して、光制御パネル4’を得ていたが、その位置とは異なる位置で光制御パネル4の一部を加熱して、光制御パネル4’を得てもよい。
In the first embodiment, the light control panel 4 ′ is obtained by heating a part of the light control panel 4 at the position at the time of inspection of the 80-inch liquid crystal display panel 1, but at a position different from the position. A part of the light control panel 4 may be heated to obtain the light control panel 4 ′.
上記第1実施形態では、光透過領域41’および遮光領域42’の形成に、それぞれの形状が長板形状である第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cを用いていたが、図8に示すように、平面視形状がコの字形状であるヒータ60を用いてもよい。
In the first embodiment, the first heater 6A, the second heater 6B, and the third heater 6C, each of which has a long plate shape, are used to form the light transmission region 41 ′ and the light shielding region 42 ′. As shown in FIG. 8, a heater 60 having a U shape in plan view may be used.
ヒータ60は、第1ヒータ6Aなどとは形状が異なるだけであって、第1ヒータ6Aなどと同様に、光制御パネル4の感熱層44を加熱することが可能である。また、ヒータ60の内側の領域が70型の光透過領域41’に対応するように、ヒータ60の形状が設定されている。また、ヒータ60には、光制御パネル4に接触する平坦面が設けられている。
The heater 60 is only different in shape from the first heater 6A and the like, and can heat the heat-sensitive layer 44 of the light control panel 4 in the same manner as the first heater 6A and the like. Further, the shape of the heater 60 is set so that the area inside the heater 60 corresponds to the 70-type light transmission area 41 ′. The heater 60 is provided with a flat surface that contacts the light control panel 4.
ヒータ60を用いて、光透過領域41’および遮光領域42’を形成するとき、ヒータ60の平坦面の温度を所定温度まで上げた後、図9に示すように、光透過領域41の遮光領域42と隣り合う部分に、ヒータ60の平坦面を接触させる。これにより、図6に示すように、光透過領域41’および遮光領域42’が得られる。なお、光透過領域41の遮光領域42と隣り合う部分に、ヒータ60の平坦面を接触させた後、その平坦面の温度を所定温度まで上げてもよい。
When the light transmission region 41 ′ and the light shielding region 42 ′ are formed using the heater 60, the temperature of the flat surface of the heater 60 is raised to a predetermined temperature, and then the light shielding region of the light transmission region 41 as shown in FIG. The flat surface of the heater 60 is brought into contact with a portion adjacent to 42. Thereby, as shown in FIG. 6, the light transmission area | region 41 'and the light-shielding area | region 42' are obtained. In addition, after making the flat surface of the heater 60 contact the part adjacent to the light-shielding region 42 of the light transmission region 41, the temperature of the flat surface may be raised to a predetermined temperature.
このように、光制御パネル4にヒータ60を一度接触させれば、光透過領域41および遮光領域42が得られるので、光透過領域41および遮光領域42を得るための作業を効率良く行うことができる。
As described above, once the heater 60 is brought into contact with the light control panel 4, the light transmission region 41 and the light shielding region 42 are obtained. Therefore, the work for obtaining the light transmission region 41 and the light shielding region 42 can be efficiently performed. it can.
上記第1実施形態では、光透過領域41,41’および遮光領域42,42’は、感熱層44を用いて形成されていたが、例えば感圧シートで形成されるようにしてもよい。
In the first embodiment, the light transmission regions 41 and 41 'and the light shielding regions 42 and 42' are formed using the heat sensitive layer 44, but may be formed of, for example, a pressure sensitive sheet.
〔第2実施形態〕
図10は、この発明の第2実施形態の表示パネル用検査装置のブロック図である。 [Second Embodiment]
FIG. 10 is a block diagram of a display panel inspection apparatus according to the second embodiment of the present invention.
図10は、この発明の第2実施形態の表示パネル用検査装置のブロック図である。 [Second Embodiment]
FIG. 10 is a block diagram of a display panel inspection apparatus according to the second embodiment of the present invention.
上記表示パネル用検査装置は、液晶表示パネル1’の機種を示す機種情報を検出するバーコードリーダ207を備える。これにより、遮光領域42の面積は、バーコードリーダ207によって検出された機種情報に基づいて、自動的に変更可能になっている。なお、バーコードリーダ207は機種情報検出部の一例である。
The display panel inspection apparatus includes a bar code reader 207 that detects model information indicating the model of the liquid crystal display panel 1 ′. Thereby, the area of the light shielding region 42 can be automatically changed based on the model information detected by the barcode reader 207. The barcode reader 207 is an example of a model information detection unit.
より詳しくは、上記表示パネル用検査装置は、このバーコードリーダ207からの信号が入力されるコンピュータ205と、ヒータ駆動ユニット208を備える。
More specifically, the display panel inspection apparatus includes a computer 205 to which a signal from the bar code reader 207 is input, and a heater drive unit 208.
ヒータ駆動ユニット208は、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cのそれぞれを独立してx軸方向,y軸方向,z軸方向に駆動させる。
The heater driving unit 208 drives the first heater 6A, the second heater 6B, and the third heater 6C independently in the x-axis direction, the y-axis direction, and the z-axis direction.
コンピュータ205にはバーコードリーダ207からの信号が入力される。このコンピュータ205の制御装置252は、バックライトユニット制御部52a、画像表示領域制御部52b、検査部52c、ヒータ温度制御部252dおよびヒータ駆動ユニット制御部252eを有する。
The computer 205 receives a signal from the barcode reader 207. The control device 252 of the computer 205 includes a backlight unit control unit 52a, an image display region control unit 52b, an inspection unit 52c, a heater temperature control unit 252d, and a heater drive unit control unit 252e.
ヒータ温度制御部252dは、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6C内の平坦面の温度を制御する。これにより、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cの平坦面が光制御パネル4の感熱層44に接触しているとき、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cの平坦面の温度を所定温度とすることが可能になっている。
The heater temperature control unit 252d controls the temperatures of the flat surfaces in the first heater 6A, the second heater 6B, and the third heater 6C. Thus, when the flat surfaces of the first heater 6A, the second heater 6B, and the third heater 6C are in contact with the heat-sensitive layer 44 of the light control panel 4, the first heater 6A, the second heater 6B, and the third heater 6C. The temperature of the flat surface can be set to a predetermined temperature.
ヒータ駆動ユニット制御部252eは、バーコードリーダ207からの機種情報に基づいて、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cの駆動を制御する。例えば、ヒータ駆動ユニット制御部252eは、図5を使って説明しように、第1ヒータ6A、第2ヒータ6Bおよび第3ヒータ6Cを動かす。
The heater drive unit controller 252e controls the driving of the first heater 6A, the second heater 6B, and the third heater 6C based on the model information from the barcode reader 207. For example, the heater drive unit controller 252e moves the first heater 6A, the second heater 6B, and the third heater 6C, as will be described with reference to FIG.
上記構成の表示パネル用検査装置を用いて、例えば、80型の液晶表示パネル1を検査した後、70型の液晶表示パネル1’を検査する場合、70型の液晶表示パネル1’の機種情報を示すバーコードが印刷されたシールを、70型の液晶表示パネル1’の画像表示領域11以外の部分に予め貼り付ける。これにより、検査員は、画像表示領域11の撮像前、上記シールのバーコードをバーコードリーダ207でスキャンすると、機種情報に対応する加熱処理が光制御パネル4の感熱層44に自動的に行われる。すなわち、図6に示す光透過領域41’および遮光領域42’が自動的に得られる。したがって、70型の液晶表示パネル1の周縁部に隣接する空間を通ってカメラ3に向かう光を遮るための遮光面積を自動的に設定することができる。
For example, when the 70-inch liquid crystal display panel 1 ′ is inspected after the 80-inch liquid crystal display panel 1 is inspected using the display panel inspection apparatus having the above configuration, the model information of the 70-type liquid crystal display panel 1 ′ is used. A sticker printed with a bar code indicating is attached in advance to a portion other than the image display area 11 of the 70-inch liquid crystal display panel 1 ′. As a result, when the inspector scans the barcode on the sticker with the barcode reader 207 before imaging the image display area 11, the heat treatment corresponding to the model information is automatically performed on the thermal layer 44 of the light control panel 4. Is called. That is, the light transmission region 41 ′ and the light shielding region 42 ′ shown in FIG. 6 are automatically obtained. Therefore, a light blocking area for blocking light traveling toward the camera 3 through a space adjacent to the peripheral edge of the 70-type liquid crystal display panel 1 can be automatically set.
〔第3実施形態〕
図11は、この発明の第3実施形態の表示パネル用検査装置の主要部の概略構成を示す模式図である。 [Third Embodiment]
FIG. 11 is a schematic diagram showing a schematic configuration of a main part of a display panel inspection apparatus according to a third embodiment of the present invention.
図11は、この発明の第3実施形態の表示パネル用検査装置の主要部の概略構成を示す模式図である。 [Third Embodiment]
FIG. 11 is a schematic diagram showing a schematic configuration of a main part of a display panel inspection apparatus according to a third embodiment of the present invention.
上記表示パネル用検査装置は、液晶シャッタ装置304およびコンピュータ305を備えている。なお、液晶シャッタ装置304は、光制御部材の一例であると共に、電気光学部の一例である。
The display panel inspection apparatus includes a liquid crystal shutter device 304 and a computer 305. The liquid crystal shutter device 304 is an example of a light control member and an example of an electro-optical unit.
より詳しくは、液晶シャッタ装置304は、複数の液晶シャッタで構成されている。この各液晶シャッタは、画像表示領域11からカメラ3への光を透過することが可能である。また、各液晶シャッタは、印加電圧を変更することにより、液晶表示パネル1の周囲を通ってカメラ3に向かう光に対して不透明になることも可能である。
More specifically, the liquid crystal shutter device 304 includes a plurality of liquid crystal shutters. Each liquid crystal shutter can transmit light from the image display area 11 to the camera 3. In addition, each liquid crystal shutter can be made opaque with respect to the light traveling toward the camera 3 through the periphery of the liquid crystal display panel 1 by changing the applied voltage.
制御装置352は、検査員の指示を示す信号に基づいて、液晶シャッタ装置304の各液晶シャッタの印加電圧を変更する印加電圧変更部352fを有している。この各液晶シャッタの印加電圧が変更されると、液晶シャッタ装置304は、図3の状態と同様の状態から、図6の状態と同様の状態に変化したり、図6の状態と同様の状態から、図3の状態と同様の状態に変化したりする。
The control device 352 has an applied voltage changing unit 352f that changes the applied voltage of each liquid crystal shutter of the liquid crystal shutter device 304 based on a signal indicating an instruction from the inspector. When the voltage applied to each liquid crystal shutter is changed, the liquid crystal shutter device 304 changes from a state similar to the state of FIG. 3 to a state similar to the state of FIG. 6 or a state similar to the state of FIG. To a state similar to the state of FIG.
上記構成の表示パネル用検査装置は、上記第1実施形態と同様の作用効果を奏すると共に、印加電圧変更部352fが液晶シャッタ装置304の各液晶シャッタの印加電圧を変更することにより、液晶シャッタ装置304の遮光領域の形状および面積を任意に設定することができる。
The display panel inspection apparatus having the above configuration has the same effects as those of the first embodiment, and the applied voltage changing unit 352f changes the applied voltage of each liquid crystal shutter of the liquid crystal shutter device 304, whereby the liquid crystal shutter device. The shape and area of the light-shielding area 304 can be arbitrarily set.
上記第3実施形態では、液晶シャッタ装置304の遮光領域の面積は、作業者の指示がなければ、変更されないが、作業者の指示がなくても、自動的に変更されるようにしてもよい。例えば、上記第2実施形態のバーコードリーダ207からの機種情報に基づいて、液晶シャッタ装置304の遮光領域42の面積が自動的に変更されるようにしてもよい。すなわち、上記第2,第3実施形態の記載内容を適宜組み合わせたものを、この発明の一実施形態としてもよい。
In the third embodiment, the area of the light-shielding region of the liquid crystal shutter device 304 is not changed without an instruction from the operator, but may be automatically changed without an instruction from the operator. . For example, the area of the light shielding region 42 of the liquid crystal shutter device 304 may be automatically changed based on the model information from the barcode reader 207 of the second embodiment. That is, a combination of the descriptions in the second and third embodiments as appropriate may be an embodiment of the present invention.
〔第4実施形態〕
図12は、この発明の第4実施形態の表示パネル用検査装置の主要部の概略構成を示す模式図である。 [Fourth Embodiment]
FIG. 12 is a schematic diagram showing a schematic configuration of a main part of the display panel inspection apparatus according to the fourth embodiment of the present invention.
図12は、この発明の第4実施形態の表示パネル用検査装置の主要部の概略構成を示す模式図である。 [Fourth Embodiment]
FIG. 12 is a schematic diagram showing a schematic configuration of a main part of the display panel inspection apparatus according to the fourth embodiment of the present invention.
上記表示パネル用検査装置は、カメラ3と光制御パネル4との間に配置されたカメラ用偏光板410と、バックライトユニット2と液晶表示パネル1との間に配置されたバックライト用偏光板420とを備えている。なお、カメラ用偏光板410は撮像装置用偏光板の一例であり、バックライト用偏光板420は光源装置用偏光板の一例である。
The display panel inspection apparatus includes a camera polarizing plate 410 disposed between the camera 3 and the light control panel 4, and a backlight polarizing plate disposed between the backlight unit 2 and the liquid crystal display panel 1. 420. The camera polarizing plate 410 is an example of an imaging device polarizing plate, and the backlight polarizing plate 420 is an example of a light source device polarizing plate.
カメラ用偏光板410の吸収軸は、図13に示すように前側偏光板124の吸収軸と平行である。すなわち、カメラ用偏光板410の吸収軸はy軸と平行である。なお、図13では、光制御パネル4の図示を省略している。
The absorption axis of the camera polarizing plate 410 is parallel to the absorption axis of the front polarizing plate 124 as shown in FIG. That is, the absorption axis of the camera polarizing plate 410 is parallel to the y-axis. In FIG. 13, the light control panel 4 is not shown.
バックライト用偏光板420は、例えば、前面(後側偏光板114側の面)および後面(後側偏光板114側とは反対側の面)がバックライトユニット2の前面と同サイズであり、バックライトユニット2の前面全域を覆っている。このバックライト用偏光板420の後面はバックライトユニット2の前面に接触している。また、バックライト用偏光板420の吸収軸は、後側偏光板114の吸収軸と平行である。すなわち、バックライト用偏光板420の吸収軸はz軸と平行である。なお、バックライト用偏光板420は、バックライトユニット2の前面よりも大きくしてもよい。また、バックライト用偏光板420は、バックライトユニット2の前面から所定間隔を隔てて配置されてもよい。
For the backlight polarizing plate 420, for example, the front surface (the surface on the rear polarizing plate 114 side) and the rear surface (the surface opposite to the rear polarizing plate 114 side) are the same size as the front surface of the backlight unit 2. The entire front surface of the backlight unit 2 is covered. The rear surface of the backlight polarizing plate 420 is in contact with the front surface of the backlight unit 2. The absorption axis of the backlight polarizing plate 420 is parallel to the absorption axis of the rear polarizing plate 114. That is, the absorption axis of the backlight polarizing plate 420 is parallel to the z-axis. The backlight polarizing plate 420 may be larger than the front surface of the backlight unit 2. Further, the backlight polarizing plate 420 may be disposed at a predetermined interval from the front surface of the backlight unit 2.
上記構成の表示パネル用検査装置では、カメラ3と光制御パネル4との間にカメラ用偏光板410を配置し、バックライトユニット2と液晶表示パネル1との間にバックライト用偏光板420を配置した状態で、画像表示領域11の撮像を行う。これにより、バックライトユニット2から出射された光のうち、バックライト用偏光板420を通過した光のみ、すなわち、バックライト用偏光板420の吸収軸と直交する振動方向の光のみが、液晶表示パネル1に向かう。したがって、仮に、液晶表示パネル1の周囲を通った光がカメラ3に向かったとしても、上記光はバックライト用偏光板420からの光となるので、上記光がカメラ3に入射するのをカメラ用偏光板410で防ぐことができる。なお、液晶表示パネル1内を通過する光は、振動方向が90度ねじれるため、液晶表示パネル1内を通って画像表示領域11から前方に出射された光は、カメラ用偏光板410を通過してカメラ3に入射する。
In the display panel inspection apparatus having the above configuration, the camera polarizing plate 410 is disposed between the camera 3 and the light control panel 4, and the backlight polarizing plate 420 is disposed between the backlight unit 2 and the liquid crystal display panel 1. In the arranged state, the image display area 11 is imaged. Thereby, only the light that has passed through the backlight polarizing plate 420 out of the light emitted from the backlight unit 2, that is, only the light in the vibration direction orthogonal to the absorption axis of the backlight polarizing plate 420 is displayed on the liquid crystal display. Go to panel 1. Therefore, even if the light passing through the periphery of the liquid crystal display panel 1 is directed to the camera 3, the light becomes light from the backlight polarizing plate 420, so that the light is incident on the camera 3. The polarizing plate 410 can prevent this. Since the light passing through the liquid crystal display panel 1 is twisted by 90 degrees in the vibration direction, the light emitted forward from the image display region 11 through the liquid crystal display panel 1 passes through the camera polarizing plate 410. Then enters the camera 3.
この発明の具体的な実施形態について説明したが、この発明は上記実施形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。例えば、上記第1~第4実施形態で記載した内容を適宜組み合わせたものを、この発明の一実施形態としてもよい。
Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, a suitable combination of the contents described in the first to fourth embodiments may be used as one embodiment of the present invention.
すなわち、上記開示を纏めると、次のようになる。
That is, the above disclosure can be summarized as follows.
この発明の一態様に係る表示パネル用検査装置は、
画像表示領域11を有する表示パネル1,1’を検査するための表示パネル用検査装置であって、
上記表示パネル1,1’の前方に配置され、上記画像表示領域11を撮像する撮像装置3と、
上記表示パネル1,1’と上記撮像装置3との間に配置された光制御部材4,304と
を備え、
上記光制御部材4,304は、
上記画像表示領域11から前方に出射された光を透過する光透過領域41,41’,341と、
上記表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域42,42’,342と
を有し、
上記遮光領域42,42’,342の面積は、上記表示パネル1,1’に対する上記光制御部材4,304の位置を保持した状態で、任意に変更可能である。 An inspection apparatus for a display panel according to one aspect of the present invention,
A display panel inspection apparatus for inspecting a display panel 1, 1 ′ having an image display area 11,
Animaging device 3 that is disposed in front of the display panels 1 and 1 ′ and images the image display area 11;
A light control member 4, 304 disposed between the display panel 1, 1 ′ and the imaging device 3;
The light control members 4 and 304 are
Light transmissive regions 41, 41 ′, 341 that transmit light emitted forward from the image display region 11, and
Light-shielding regions 42, 42 ', and 342 that block light traveling forward through a space adjacent to the peripheral edge of the display panel 1, 1';
The areas of the light shielding regions 42, 42 ′, and 342 can be arbitrarily changed in a state where the positions of the light control members 4 and 304 with respect to the display panels 1 and 1 ′ are maintained.
画像表示領域11を有する表示パネル1,1’を検査するための表示パネル用検査装置であって、
上記表示パネル1,1’の前方に配置され、上記画像表示領域11を撮像する撮像装置3と、
上記表示パネル1,1’と上記撮像装置3との間に配置された光制御部材4,304と
を備え、
上記光制御部材4,304は、
上記画像表示領域11から前方に出射された光を透過する光透過領域41,41’,341と、
上記表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域42,42’,342と
を有し、
上記遮光領域42,42’,342の面積は、上記表示パネル1,1’に対する上記光制御部材4,304の位置を保持した状態で、任意に変更可能である。 An inspection apparatus for a display panel according to one aspect of the present invention,
A display panel inspection apparatus for inspecting a
An
A
The
Light-shielding
The areas of the
ここで、上記表示パネル1,1’の前方とは、ユーザが画像表示領域11を見るとき、そのユーザが存在する側を指す。
Here, the front of the display panels 1 and 1 ′ indicates a side where the user is present when the user views the image display area 11.
上記構成によれば、上記撮像装置3が画像表示領域11を撮像するとき、表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光が遮光領域42,42’,342で遮られるので、上記光による悪影響が画像表示領域11の撮像に及ぶのを防ぐことができる。したがって、上記撮像装置3が撮像した画像表示領域11に基づいて、画像表示領域11の例えばムラ補正を良好に行うことができる。すなわち、上記ムラ補正が不良となるのを回避することができる。
According to the above configuration, when the imaging device 3 captures the image display area 11, the light traveling forward through the space adjacent to the peripheral edge of the display panel 1, 1 ′ is in the light shielding areas 42, 42 ′, 342. Since the light is blocked, it is possible to prevent the adverse effect due to the light from being captured on the image display region 11. Therefore, for example, unevenness correction of the image display area 11 can be performed satisfactorily based on the image display area 11 captured by the imaging device 3. That is, it is possible to avoid the above-described unevenness correction from being defective.
また、上記表示パネル1,1’に対する光制御部材4,304の位置を保持した状態で、遮光領域42,42’,342の面積は任意に変更可能である。これにより、上記表示パネル1,1’とはパネルサイズが異なる他の表示パネル1,1’を検査するとき、光制御部材4,304を動かさなくても、上記他の表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光を遮光領域42,42’,342で遮ることができる。したがって、様々なパネルサイズの表示パネル1,1’を検査することができると共に、検査効率の低下を防ぐことができる。
Further, the area of the light shielding regions 42, 42 'and 342 can be arbitrarily changed in a state where the position of the light control members 4 and 304 with respect to the display panels 1 and 1' is maintained. As a result, when inspecting another display panel 1, 1 'having a panel size different from that of the display panel 1, 1', the other display panel 1, 1 'can be obtained without moving the light control member 4, 304. The light that travels forward through the space adjacent to the peripheral edge can be blocked by the light blocking regions 42, 42 ′, and 342. Therefore, it is possible to inspect the display panels 1 and 1 ′ having various panel sizes, and it is possible to prevent a decrease in inspection efficiency.
一実施形態の表示パネル用検査装置では、
上記遮光領域42,42’は、加熱されることによって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる感熱層44で形成される。 In the display panel inspection apparatus of one embodiment,
Thelight shielding regions 42 and 42 'are formed of a heat sensitive layer 44 that becomes opaque to light traveling forward through the periphery of the display panel 1 and 1' when heated.
上記遮光領域42,42’は、加熱されることによって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる感熱層44で形成される。 In the display panel inspection apparatus of one embodiment,
The
上記実施形態によれば、上記感熱層44を加熱すると、感熱層44は上記光に対して不透明になる。したがって、上記加熱の対象となる領域の面積を調整することにより、遮光領域42,42’の面積を任意に設定することができる。
According to the embodiment, when the heat-sensitive layer 44 is heated, the heat-sensitive layer 44 becomes opaque to the light. Therefore, the areas of the light shielding regions 42 and 42 'can be arbitrarily set by adjusting the area of the region to be heated.
一実施形態の表示パネル用検査装置では、
上記遮光領域342は、印加電圧を変更することよって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる電気光学部304で形成される。 In the display panel inspection apparatus of one embodiment,
Thelight shielding region 342 is formed by an electro-optic unit 304 that becomes opaque to light traveling forward through the periphery of the display panels 1 and 1 ′ by changing the applied voltage.
上記遮光領域342は、印加電圧を変更することよって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる電気光学部304で形成される。 In the display panel inspection apparatus of one embodiment,
The
上記実施形態によれば、上記電気光学部304の印加電圧を制御することにより、遮光領域342の面積を任意に設定することができる。
According to the above embodiment, the area of the light shielding region 342 can be arbitrarily set by controlling the voltage applied to the electro-optical unit 304.
一実施形態の表示パネル用検査装置では、
上記表示パネル1,1’の機種を示す機種情報を検出する機種情報検出部207を備え、
上記遮光領域42,42’の面積は、上記機種情報検出部207によって検出された上記機種情報に基づいて自動的に変更される。 In the display panel inspection apparatus of one embodiment,
A modelinformation detection unit 207 that detects model information indicating the model of the display panel 1 or 1 ′;
The areas of the light shielding regions 42, 42 ′ are automatically changed based on the model information detected by the model information detection unit 207.
上記表示パネル1,1’の機種を示す機種情報を検出する機種情報検出部207を備え、
上記遮光領域42,42’の面積は、上記機種情報検出部207によって検出された上記機種情報に基づいて自動的に変更される。 In the display panel inspection apparatus of one embodiment,
A model
The areas of the
上記実施形態によれば、上記機種情報検出部207によって検出された機種情報に基づいて、遮光領域42,42’の面積を自動的に変更させるので、検査効率を向上させることができる。
According to the above embodiment, since the areas of the light shielding regions 42 and 42 'are automatically changed based on the model information detected by the model information detection unit 207, the inspection efficiency can be improved.
一実施形態の表示パネル用検査装置は、
上記光制御部材4,304と上記撮像装置3との間に配置された撮像装置用偏光板410と、
上記表示パネル1,1’の後方に配置され、上記表示パネル1,1’に向かって光を出射する光源装置2と、
上記光源装置2と上記表示パネル1,1’との間に配置された光源装置用偏光板420と
を備え、
上記表示パネル1,1’は、
表示パネル本体100と、
上記表示パネル本体100の前方に配置された前側偏光板124と、
上記表示パネル本体100の後方に配置されていると共に、上記前側偏光板124の吸収軸と直交する吸収軸を有する後側偏光板114と
を有し、
上記撮像装置用偏光板410の吸収軸は、上記前側偏光板124の吸収軸と平行であり、
上記光源装置用偏光板420の吸収軸は、上記後側偏光板114の吸収軸と平行である。 An inspection apparatus for a display panel according to one embodiment
An imagingdevice polarizing plate 410 disposed between the light control members 4, 304 and the imaging device 3;
Alight source device 2 disposed behind the display panels 1 and 1 ′ and emitting light toward the display panels 1 and 1 ′;
Apolarizing plate 420 for a light source device disposed between the light source device 2 and the display panel 1, 1 ′,
Thedisplay panels 1 and 1 '
Adisplay panel body 100;
A frontpolarizing plate 124 disposed in front of the display panel body 100;
A rearpolarizing plate 114 disposed behind the display panel body 100 and having an absorption axis orthogonal to the absorption axis of the front polarizing plate 124;
The absorption axis of the imagingdevice polarizing plate 410 is parallel to the absorption axis of the front polarizing plate 124,
The absorption axis of thepolarizing plate 420 for the light source device is parallel to the absorption axis of the rear polarizing plate 114.
上記光制御部材4,304と上記撮像装置3との間に配置された撮像装置用偏光板410と、
上記表示パネル1,1’の後方に配置され、上記表示パネル1,1’に向かって光を出射する光源装置2と、
上記光源装置2と上記表示パネル1,1’との間に配置された光源装置用偏光板420と
を備え、
上記表示パネル1,1’は、
表示パネル本体100と、
上記表示パネル本体100の前方に配置された前側偏光板124と、
上記表示パネル本体100の後方に配置されていると共に、上記前側偏光板124の吸収軸と直交する吸収軸を有する後側偏光板114と
を有し、
上記撮像装置用偏光板410の吸収軸は、上記前側偏光板124の吸収軸と平行であり、
上記光源装置用偏光板420の吸収軸は、上記後側偏光板114の吸収軸と平行である。 An inspection apparatus for a display panel according to one embodiment
An imaging
A
A
The
A
A front
A rear
The absorption axis of the imaging
The absorption axis of the
上記実施形態によれば、上記撮像装置用偏光板410の吸収軸を、前側偏光板124の吸収軸と平行とすると共に、光源装置用偏光板420の吸収軸を、後側偏光板114の吸収軸と平行とするので、仮に、光源装置用偏光板420から出射された光が表示パネル1,1’の周囲を通って撮像装置3に向かったとしても、その光が撮像装置3に入射するのを撮像装置用偏光板410で防ぐことができる。
According to the embodiment, the absorption axis of the imaging device polarizing plate 410 is parallel to the absorption axis of the front polarizing plate 124, and the absorption axis of the light source device polarizing plate 420 is the absorption of the rear polarizing plate 114. Since it is parallel to the axis, even if the light emitted from the polarizing plate 420 for the light source device passes through the periphery of the display panel 1, 1 ′ and travels toward the imaging device 3, the light enters the imaging device 3. Can be prevented by the polarizing plate 410 for the imaging device.
この発明の一態様に係る表示パネル用検査方法は、
画像表示領域11を有する表示パネル1,1’を検査するための表示パネル用検査方法であって、
上記画像表示領域11から前方に出射された光を透過する光透過領域41,41’,341と、上記表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域42,42’,342とを有する光制御部材4,304を、上記表示パネル1,1’と撮像装置3との間に配置する工程と、
上記光制御部材の配置後、上記表示パネル1,1’の後方に配置された光源装置2に上記表示パネル1,1’に向かって光を出射させた状態で、上記表示パネル1,1’の上記画像表示領域11を上記撮像装置3で撮像する工程と
を備え、
上記遮光領域42,42’,342の面積は、上記表示パネル1,1’に対する上記光制御部材4,304の位置を保持した状態で、任意に変更可能である。 An inspection method for a display panel according to an aspect of the present invention includes:
A display panel inspection method for inspecting a display panel 1, 1 ′ having an image display area 11,
A light-transmitting region 41, 41 ', 341 that transmits light emitted forward from the image display region 11 and a light shield that blocks light traveling forward through a space adjacent to the peripheral edge of the display panel 1, 1'. Arranging a light control member 4, 304 having regions 42, 42 ′, 342 between the display panel 1, 1 ′ and the imaging device 3;
After the light control member is arranged, thelight source device 2 arranged behind the display panel 1, 1 ′ emits light toward the display panel 1, 1 ′, and the display panel 1, 1 ′. Imaging the image display area 11 with the imaging device 3,
The areas of the light shielding regions 42, 42 ′, and 342 can be arbitrarily changed in a state where the positions of the light control members 4 and 304 with respect to the display panels 1 and 1 ′ are maintained.
画像表示領域11を有する表示パネル1,1’を検査するための表示パネル用検査方法であって、
上記画像表示領域11から前方に出射された光を透過する光透過領域41,41’,341と、上記表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域42,42’,342とを有する光制御部材4,304を、上記表示パネル1,1’と撮像装置3との間に配置する工程と、
上記光制御部材の配置後、上記表示パネル1,1’の後方に配置された光源装置2に上記表示パネル1,1’に向かって光を出射させた状態で、上記表示パネル1,1’の上記画像表示領域11を上記撮像装置3で撮像する工程と
を備え、
上記遮光領域42,42’,342の面積は、上記表示パネル1,1’に対する上記光制御部材4,304の位置を保持した状態で、任意に変更可能である。 An inspection method for a display panel according to an aspect of the present invention includes:
A display panel inspection method for inspecting a
A light-transmitting
After the light control member is arranged, the
The areas of the
ここで、上記表示パネル1,1’の前方とは、ユーザが画像表示領域11を見るとき、そのユーザが存在する側を指す。
Here, the front of the display panels 1 and 1 ′ indicates a side where the user is present when the user views the image display area 11.
上記構成によれば、上記撮像装置3が画像表示領域11を撮像するとき、表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光が遮光領域42,42’,342で遮られるので、上記光による悪影響が画像表示領域11の撮像に及ぶのを防ぐことができる。したがって、上記撮像装置3が撮像した画像表示領域11に基づいて、画像表示領域11の例えばムラ補正を良好に行うことができる。すなわち、上記ムラ補正が不良となるのを回避することができる。
According to the above configuration, when the imaging device 3 captures the image display area 11, the light traveling forward through the space adjacent to the peripheral edge of the display panel 1, 1 ′ is in the light shielding areas 42, 42 ′, 342. Since the light is blocked, it is possible to prevent the adverse effect due to the light from being captured on the image display region 11. Therefore, for example, unevenness correction of the image display area 11 can be performed satisfactorily based on the image display area 11 captured by the imaging device 3. That is, it is possible to avoid the above-described unevenness correction from being defective.
また、上記表示パネル1,1’に対する光制御部材4,304の位置を保持した状態で、遮光領域42,42’,342の面積は任意に変更可能である。これにより、上記表示パネル1,1’とはパネルサイズが異なる他の表示パネル1,1’を検査するとき、光制御部材4,304を動かさなくても、上記他の表示パネル1,1’の周縁部に隣接する空間を通って前方に向かう光を遮光領域42,42’,342で遮ることができる。したがって、様々なパネルサイズの表示パネル1,1’を検査することができると共に、検査効率の低下を防ぐことができる。
Further, the area of the light shielding regions 42, 42 'and 342 can be arbitrarily changed in a state where the position of the light control members 4 and 304 with respect to the display panels 1 and 1' is maintained. As a result, when inspecting another display panel 1, 1 'having a panel size different from that of the display panel 1, 1', the other display panel 1, 1 'can be obtained without moving the light control member 4, 304. The light that travels forward through the space adjacent to the peripheral edge can be blocked by the light blocking regions 42, 42 ′, and 342. Therefore, it is possible to inspect the display panels 1 and 1 ′ having various panel sizes, and it is possible to prevent a decrease in inspection efficiency.
一実施形態の表示パネル用検査方法では、
加熱されることによって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる感熱層44を用いて、上記遮光領域42,42’を形成する。 In the display panel inspection method of one embodiment,
The light-shielding regions 42 and 42 ′ are formed by using the heat-sensitive layer 44 that is heated and becomes opaque to the light traveling forward through the periphery of the display panels 1 and 1 ′.
加熱されることによって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる感熱層44を用いて、上記遮光領域42,42’を形成する。 In the display panel inspection method of one embodiment,
The light-shielding
上記実施形態によれば、上記感熱層44を加熱すると、感熱層44は表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる。したがって、上記加熱の対象となる領域の面積を調整することにより、遮光領域42,42’の面積を任意に設定することができる。
According to the above-described embodiment, when the heat-sensitive layer 44 is heated, the heat-sensitive layer 44 becomes opaque to light traveling forward through the periphery of the display panels 1 and 1 ′. Therefore, the areas of the light shielding regions 42 and 42 'can be arbitrarily set by adjusting the area of the region to be heated.
一実施形態の表示パネル用検査方法では、
印加電圧を変更することよって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる電気光学部304を用いて、上記遮光領域342を形成する。 In the display panel inspection method of one embodiment,
By changing the applied voltage, thelight shielding region 342 is formed by using the electro-optic part 304 that becomes opaque to the light traveling forward through the periphery of the display panel 1, 1 ′.
印加電圧を変更することよって、上記表示パネル1,1’の周囲を通って前方に向かう光に対して不透明になる電気光学部304を用いて、上記遮光領域342を形成する。 In the display panel inspection method of one embodiment,
By changing the applied voltage, the
上記実施形態によれば、上記電気光学部304の印加電圧を変更すると、電気光学部304は上記光に対して不透明になる。したがって、上記印加電圧を制御することにより、遮光領域342の面積を任意に設定することができる。
According to the embodiment, when the applied voltage of the electro-optical unit 304 is changed, the electro-optical unit 304 becomes opaque with respect to the light. Therefore, the area of the light shielding region 342 can be arbitrarily set by controlling the applied voltage.
一実施形態の表示パネル用検査方法では、
上記画像表示領域11の撮像前、上記表示パネル1,1’の機種を示す機種情報を機種情報検出部207で検出して、上記機種情報検出部207によって検出された機種情報に基づいて、遮光領域42,42’の面積を自動的に変更させる。 In the display panel inspection method of one embodiment,
Before capturing theimage display area 11, model information indicating the model of the display panel 1, 1 ′ is detected by the model information detection unit 207, and light shielding is performed based on the model information detected by the model information detection unit 207. The areas 42 and 42 'are automatically changed.
上記画像表示領域11の撮像前、上記表示パネル1,1’の機種を示す機種情報を機種情報検出部207で検出して、上記機種情報検出部207によって検出された機種情報に基づいて、遮光領域42,42’の面積を自動的に変更させる。 In the display panel inspection method of one embodiment,
Before capturing the
上記実施形態によれば、上記画像表示領域11の撮像前、遮光領域42,42’の面積が自動的に変更するので、検査効率を向上させることができる。
According to the above embodiment, since the areas of the light shielding regions 42 and 42 'are automatically changed before the image display region 11 is imaged, the inspection efficiency can be improved.
一実施形態の表示パネル用検査方法では、
上記表示パネル1,1’は、
表示パネル本体100と、
上記表示パネル本体100の前方に配置された前側偏光板124と、
上記表示パネル本体100の後方に配置されていると共に、上記前側偏光板124の吸収軸と直交する吸収軸を有する後側偏光板114と
を有し、
上記前側偏光板124の吸収軸と平行な吸収軸を有する撮像装置用偏光板410を上記光制御部材4,304と上記撮像装置3との間に配置すると共に、上記後側偏光板114の吸収軸と平行な吸収軸を有する光源装置用偏光板420を上記光源装置2と上記表示パネル1,1’との間に配置した後、上記画像表示領域11の撮像を行う。 In the display panel inspection method of one embodiment,
Thedisplay panels 1 and 1 '
Adisplay panel body 100;
A frontpolarizing plate 124 disposed in front of the display panel body 100;
A rearpolarizing plate 114 disposed behind the display panel body 100 and having an absorption axis orthogonal to the absorption axis of the front polarizing plate 124;
An imagingdevice polarizing plate 410 having an absorption axis parallel to the absorption axis of the front polarizing plate 124 is disposed between the light control members 4 and 304 and the imaging device 3, and the rear polarizing plate 114 absorbs the light. After the polarizing plate 420 for the light source device having an absorption axis parallel to the axis is disposed between the light source device 2 and the display panels 1 and 1 ′, the image display region 11 is imaged.
上記表示パネル1,1’は、
表示パネル本体100と、
上記表示パネル本体100の前方に配置された前側偏光板124と、
上記表示パネル本体100の後方に配置されていると共に、上記前側偏光板124の吸収軸と直交する吸収軸を有する後側偏光板114と
を有し、
上記前側偏光板124の吸収軸と平行な吸収軸を有する撮像装置用偏光板410を上記光制御部材4,304と上記撮像装置3との間に配置すると共に、上記後側偏光板114の吸収軸と平行な吸収軸を有する光源装置用偏光板420を上記光源装置2と上記表示パネル1,1’との間に配置した後、上記画像表示領域11の撮像を行う。 In the display panel inspection method of one embodiment,
The
A
A front
A rear
An imaging
上記実施形態によれば、上記撮像装置用偏光板410が光制御部材4,304と撮像装置3との間に配置されると共に、光源装置用偏光板420が光源装置2と表示パネル1,1’との間に配置された状態で、画像表示領域11の撮像が行われる。したがって、仮に、光源装置用偏光板420から出射された光が表示パネル1,1’の周囲を通って撮像装置3に向かったとしても、その光が撮像装置3に入射するのを撮像装置用偏光板410で防ぐことができる。
According to the above embodiment, the imaging device polarizing plate 410 is disposed between the light control members 4, 304 and the imaging device 3, and the light source device polarizing plate 420 is connected to the light source device 2 and the display panels 1, 1. The image display area 11 is imaged in a state where it is arranged between “and”. Therefore, even if the light emitted from the polarizing plate 420 for the light source device passes through the periphery of the display panel 1, 1 ′ and travels toward the imaging device 3, the light is incident on the imaging device 3 for the imaging device. This can be prevented by the polarizing plate 410.
1 80型の液晶表示パネル
1’ 70型の液晶表示パネル
2 バックライトユニット
3 カメラ
4 光制御パネル
11 画像表示領域
41,41’,341 光透過領域
42,42’,342 遮光領域
44 感熱層
100 表示パネル本体
304 液晶シャッタ装置
410 撮像装置用偏光板
420 バックライト用偏光板 DESCRIPTION OFSYMBOLS 1 80 type liquid crystal display panel 1 '70 type liquid crystal display panel 2 Backlight unit 3 Camera 4 Light control panel 11 Image display area 41, 41', 341 Light transmission area 42, 42 ', 342 Light shielding area 44 Heat sensitive layer 100 Display panel body 304 Liquid crystal shutter device 410 Polarizing plate for imaging device 420 Polarizing plate for backlight
1’ 70型の液晶表示パネル
2 バックライトユニット
3 カメラ
4 光制御パネル
11 画像表示領域
41,41’,341 光透過領域
42,42’,342 遮光領域
44 感熱層
100 表示パネル本体
304 液晶シャッタ装置
410 撮像装置用偏光板
420 バックライト用偏光板 DESCRIPTION OF
Claims (10)
- 画像表示領域を有する表示パネルを検査するための表示パネル用検査装置であって、
上記表示パネルの前方に配置され、上記画像表示領域を撮像する撮像装置と、
上記表示パネルと上記撮像装置との間に配置された光制御部材と
を備え、
上記光制御部材は、
上記画像表示領域から前方に出射された光を透過する光透過領域と、
上記表示パネルの周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域と
を有し、
上記遮光領域の面積は、上記表示パネルに対する上記光制御部材の位置を保持した状態で、任意に変更可能であることを特徴とする表示パネル用検査装置。 A display panel inspection apparatus for inspecting a display panel having an image display area,
An imaging device disposed in front of the display panel and imaging the image display area;
A light control member disposed between the display panel and the imaging device;
The light control member is
A light transmission region that transmits light emitted forward from the image display region;
A light shielding region that blocks light traveling forward through a space adjacent to the peripheral edge of the display panel,
The display panel inspection apparatus, wherein the area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held. - 請求項1に記載の表示パネル用検査装置において、
上記遮光領域は、加熱されることによって、上記表示パネルの周囲を通って前方に向かう光に対して不透明になる感熱層で形成されることを特徴とする表示パネル用検査装置。 The inspection apparatus for a display panel according to claim 1,
The display panel inspection apparatus, wherein the light-shielding region is formed of a heat-sensitive layer that becomes opaque to light traveling forward through the periphery of the display panel when heated. - 請求項1に記載の表示パネル用検査装置において、
上記遮光領域は、印加電圧を変更することよって、上記表示パネルの周囲を通って前方に向かう光に対して不透明になる電気光学部で形成されることを特徴とする表示パネル用検査装置。 The inspection apparatus for a display panel according to claim 1,
The display panel inspection apparatus, wherein the light shielding region is formed by an electro-optical portion that becomes opaque to light traveling forward through the periphery of the display panel by changing an applied voltage. - 請求項1から3までのいずれか一項に記載の表示パネル用検査装置において、
上記表示パネルの機種を示す機種情報を検出する機種情報検出部を備え、
上記遮光領域の面積は、上記機種情報検出部によって検出された上記機種情報に基づいて自動的に変更されることを特徴とする表示パネル用検査装置。 In the inspection apparatus for display panels as described in any one of Claim 1 to 3,
A model information detection unit that detects model information indicating the model of the display panel is provided.
The display panel inspection apparatus, wherein the area of the light shielding area is automatically changed based on the model information detected by the model information detection unit. - 請求項1から4までのいずれか一項に記載の表示パネル用検査装置において、
上記光制御部材と上記撮像装置との間に配置された撮像装置用偏光板と、
上記表示パネルの後方に配置され、上記表示パネルに向かって光を出射する光源装置と、
上記光源装置と上記表示パネルとの間に配置された光源装置用偏光板と
を備え、
上記表示パネルは、
表示パネル本体と、
上記表示パネル本体の前方に配置された前側偏光板と、
上記表示パネル本体の後方に配置されていると共に、上記前側偏光板の吸収軸と直交する吸収軸を有する後側偏光板と、
を有し、
上記撮像装置用偏光板の吸収軸は、上記前側偏光板の吸収軸と平行であり、
上記光源装置用偏光板の吸収軸は、上記後側偏光板の吸収軸と平行であることを特徴とする表示パネル用検査装置。 In the inspection apparatus for display panels as described in any one of Claim 1 to 4,
An imaging device polarizing plate disposed between the light control member and the imaging device;
A light source device disposed behind the display panel and emitting light toward the display panel;
A polarizing plate for a light source device disposed between the light source device and the display panel,
The display panel
The display panel body,
A front polarizing plate disposed in front of the display panel body;
A rear polarizing plate disposed behind the display panel body and having an absorption axis orthogonal to the absorption axis of the front polarizing plate;
Have
The absorption axis of the polarizing plate for the imaging device is parallel to the absorption axis of the front polarizing plate,
An inspection apparatus for a display panel, wherein an absorption axis of the polarizing plate for a light source device is parallel to an absorption axis of the rear polarizing plate. - 画像表示領域を有する表示パネルを検査するための表示パネル用検査方法であって、
上記画像表示領域から前方に出射された光を透過する光透過領域と、上記表示パネルの周縁部に隣接する空間を通って前方に向かう光を遮る遮光領域とを有する光制御部材を、上記表示パネルと撮像装置との間に配置する工程と、
上記光制御部材の配置後、上記表示パネルの後方に配置された光源装置に上記表示パネルに向かって光を出射させた状態で、上記表示パネルの上記画像表示領域を上記撮像装置で撮像する工程と
を備え、
上記遮光領域の面積は、上記表示パネルに対する上記光制御部材の位置を保持した状態で、任意に変更可能であることを特徴とする表示パネル用検査方法。 An inspection method for a display panel for inspecting a display panel having an image display area,
A light control member having a light transmission region that transmits light emitted forward from the image display region and a light shielding region that blocks light traveling forward through a space adjacent to a peripheral edge of the display panel; Placing between the panel and the imaging device;
After the arrangement of the light control member, a step of imaging the image display area of the display panel with the imaging device in a state where light is emitted toward the display panel from a light source device arranged behind the display panel. And
The display panel inspection method, wherein the area of the light shielding region can be arbitrarily changed in a state where the position of the light control member with respect to the display panel is held. - 請求項6に記載の表示パネル用検査方法において、
加熱されることによって、上記表示パネルの周囲を通って前方に向かう光に対して不透明になる感熱層を用いて、上記遮光領域を形成することを特徴とする表示パネル用検査方法。 The display panel inspection method according to claim 6,
An inspection method for a display panel, characterized in that the light shielding region is formed by using a heat sensitive layer that becomes opaque to light traveling forward through the periphery of the display panel when heated. - 請求項6に記載の表示パネル用検査方法において、
印加電圧を変更することよって、上記表示パネルの周囲を通って前方に向かう光に対して不透明になる電気光学部を用いて、上記遮光領域を形成することを特徴とする表示パネル用検査方法。 The display panel inspection method according to claim 6,
An inspection method for a display panel, characterized in that the light shielding region is formed by using an electro-optical portion that becomes opaque to light traveling forward through the periphery of the display panel by changing an applied voltage. - 請求項6から8までのいずれか一項に記載の表示パネル用検査方法において、
上記画像表示領域の撮像前、上記表示パネルの機種を示す機種情報を機種情報検出部で検出して、上記機種情報検出部によって検出された機種情報に基づいて、遮光領域の面積を自動的に変更させることを特徴とする表示パネル用検査方法。 In the display panel inspection method according to any one of claims 6 to 8,
Before capturing the image display area, the model information indicating the model of the display panel is detected by the model information detection unit, and the area of the light shielding area is automatically determined based on the model information detected by the model information detection unit. An inspection method for a display panel, characterized by being changed. - 請求項6から9までのいずれか一項に記載の表示パネル用検査方法において、
上記表示パネルは、
表示パネル本体と、
上記表示パネル本体の前方に配置された前側偏光板と、
上記表示パネル本体の後方に配置されていると共に、上記前側偏光板の吸収軸と直交する吸収軸を有する後側偏光板と
を有し、
上記前側偏光板の吸収軸と平行な吸収軸を有する撮像装置用偏光板を上記光制御部材と上記撮像装置との間に配置すると共に、上記後側偏光板の吸収軸と平行な吸収軸を有する光源装置用偏光板を上記光源装置と上記表示パネルとの間に配置した後、上記画像表示領域の撮像を行うことを特徴とする表示パネル用検査方法。 In the display panel inspection method according to any one of claims 6 to 9,
The display panel
The display panel body,
A front polarizing plate disposed in front of the display panel body;
The rear polarizing plate is disposed behind the display panel body and has an absorption axis orthogonal to the absorption axis of the front polarizing plate,
An polarizing plate for an imaging device having an absorption axis parallel to the absorption axis of the front polarizing plate is disposed between the light control member and the imaging device, and an absorption axis parallel to the absorption axis of the rear polarizing plate is provided. An inspection method for a display panel, comprising: arranging a polarizing plate for a light source device between the light source device and the display panel, and then imaging the image display region.
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