KR102068560B1 - Backlight Unit for Testing System of Display Panel - Google Patents

Abstract

The present invention provides a backlight unit for a display panel inspection device capable of inspecting various sizes of a display panel with one device by forming and installing a backlight with a size corresponding to a large standard, and adjusting an area to emit light according to the standard of the display panel. The backlight unit for a display panel inspection device of the present invention comprises: a frame; a backlight installed in the frame, configured with a plurality of light sources arranged at regular intervals, and formed in a size corresponding to the size of the display panel of a large screen; a light diffusion plate installed in an upper surface of the backlight; a polarizing plate installed in an upper surface of the light diffusion plate; and a control part for controlling a pixel so as to be turned on for each area corresponding to the size of the display panel for the backlight to be inspected.

Description

Backlight Unit for Testing System of Display Panel

The present invention relates to a backlight unit for a display panel inspection apparatus, and more particularly, to a backlight unit for a display panel inspection apparatus capable of irradiating light corresponding to a display panel of various standards.

In general, display panels are essentially used as display devices in electronic devices such as smart phones, digital televisions, computers, laptops, personal digital assistants, navigation devices, and the Internet of Things.

As the display panel, a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), and the like are used as the flat panel display.

Problems occur in some pixels due to various causes such as deposition of foreign matters or scratches in the manufacturing process of the display panel, and it is necessary to check for defects by inspecting them before assembling the final product.

For example, the display panel is manufactured by using a backlight to irradiate light to visually check for defects or stains, or to photograph the camera and analyze the image to check for defects.

Republic of Korea Patent Publication Nos. 10-1400757, 10-1192757, 10-1146721, 10-0955486, 10-0834730, 10-0818543, 10-0743427, Japanese Patent Publication 6104016, 6000356, 3297950, 2955856, and the like disclose various techniques for an inspection apparatus and an inspection method of a display panel.

While the inspection apparatus and inspection method of the conventional display panel are mostly applicable to display panels of a specific standard (size), the size of the display panel used in various electronic devices ranges from small to less than 5 inches to more than 100 inches. Since it is very diverse up to large size, preparing a test apparatus for a display panel that meets each standard requires a lot of costs, and increases the manufacturing cost.

In addition, when manufacturing a display panel of various standards in one manufacturing line takes a lot of time due to the replacement of the inspection device productivity is reduced.

The present invention has been made in view of the above points, and by forming a backlight in a size corresponding to a large standard, and adjusts the area to emit light according to the size of the display panel, it is possible to inspect the display panel of various sizes with one device It is an object of the present invention to provide a backlight unit for a display panel inspection device that can be used.

The backlight unit for the display panel inspection apparatus according to an embodiment of the present invention comprises a frame, a backlight installed in the frame and a plurality of light sources are arranged at regular intervals and formed of a size corresponding to the size of the display panel of the large screen, It includes a light diffusion plate provided on the upper surface of the backlight, a polarizing plate provided on the upper surface of the light diffusion plate, and a control unit for controlling the pixels to be turned on for each area corresponding to the size of the display panel to be inspected the backlight. .

In the frame, a plurality of panel sensing sensors for sensing the size of the display panel mounted on the upper surface are arranged and installed at the corners, and the control unit lights up the area of the backlight corresponding to the size of the display panel detected by the panel sensing sensor. It is also possible to configure to control.

A light blocking member may be provided between the display panel seated on the upper surface of the frame and the polarizer to cover the upper surface of the polarizer of the outer portion where the display panel is not located.

The light blocking member includes a frame member formed in a shape corresponding to an edge of the backlight, an up and down light shielding film for shielding while moving up and down through the upper edge of the frame member, and through the edge of the side surface of the frame member to the left and right. It includes a left and right light shielding film to shield while moving.

The light blocking member is installed at the end of the up and down light shielding film and both ends are inserted into a groove or a hole formed in the left and right corners of the frame member and moved, and one end is provided with a shanghai dongdae, and a shandong dongdae Shanghai-dong motor is installed at one end of the frame member on the side of the pulley is installed and the drive pulley is connected to, and grooves are installed at the ends of the left and right light shielding film and both ends are formed in the upper and lower corners of the frame member. Or left and right movable rods inserted into the hole and moved at one end, the driven pulley is installed, and the left and right movable rods are installed at one end of the corner of the frame member on the side of the driven pulley, the driving pulley is connected At the opposite end of the corner where the motor, the shanghai motor and the left and right movement motor of the frame member are installed, Belts installed to be fixed to each of the fixed pulleys, the drive pulleys of the shanghai motor, the drive pulleys of the left and right movement motors, and the fixed pulleys, respectively, and to be fitted to the driven pulleys of the Shanghai Dongdae or the driven pulleys of the Shanghai Dongdae, respectively. It further comprises.

The shanghai motor and the left and right movement motors operate according to a control command of the controller so that the upper and lower light blocking films and the left and right light blocking films shield the upper surface of the polarizing plate.

In addition, the backlight unit for the display panel inspection apparatus according to the embodiment of the present invention further comprises a panel tray formed such that a plurality of display panels having a small size are arranged in a horizontal or vertical arrangement so as to have a size closest to the size of the backlight. It is also possible to include.

When the display panel is installed on the upper surface of the polarizer using the panel tray, the panel sensor senses the size of the panel tray and transmits the size of the panel tray to the controller, and the controller controls the area of the backlight corresponding to the size of the panel tray. It is also possible to light up by setting.

In the case where the panel tray is used, the control unit may control the shanghai motor and the left and right movement motors so that the light blocking member shields an outer portion of the panel tray.

According to the backlight unit for the display panel inspection apparatus according to an embodiment of the present invention, it is possible to inspect the display panel of various sizes using a single backlight, thereby minimizing the time required for replacing the inspection apparatus and improving productivity. .

In addition, according to the backlight unit for the display panel inspection apparatus according to the embodiment of the present invention, since it is possible to easily apply to a display panel of various sizes, the cost for providing the inspection apparatus is greatly reduced.

1 is a cross-sectional view conceptually illustrating a backlight unit for a display panel inspecting apparatus according to an exemplary embodiment of the present invention.
2 is a perspective view conceptually illustrating a configuration of a light blocking member in a backlight unit for a display panel inspecting apparatus according to an exemplary embodiment of the present invention.
3 is a perspective view conceptually illustrating an operation of a light blocking member in a backlight unit for a display panel inspecting apparatus according to an exemplary embodiment of the present invention.
4 is a block diagram conceptually illustrating an operation of a controller in a backlight unit for a display panel inspecting apparatus according to an exemplary embodiment of the present invention.
5 is a perspective view conceptually illustrating a panel tray in a backlight unit for a display panel inspecting apparatus according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, process, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present disclosure does not exclude the possibility of the presence or the addition of numbers, processes, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

The term MODULE described herein refers to one unit for processing a specific function or operation, which may mean hardware or software or a combination of hardware and software.

The terms or words used in this specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. Based on the principle of the present invention, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. In addition, if there is no other definition in the technical terms and scientific terms used, it has a meaning commonly understood by those of ordinary skill in the art to which the invention belongs, and the gist of the invention in the following description and the accompanying drawings. Descriptions of well-known functions and configurations that may be unnecessarily blurred are omitted. The drawings introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Also, like reference numerals denote like elements throughout the specification. It should be noted that like elements in the figures are represented by the same numerals wherever possible.

Next, a preferred embodiment of a backlight unit for a display panel inspecting apparatus according to the present invention will be described in detail with reference to the drawings.

As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Hereinafter, in order to clearly describe the present invention, a detailed description of parts not closely related to the present invention will be omitted. Like reference numerals refer to like or similar elements throughout the description of the present invention, and repeated descriptions will be omitted. .

First, as shown in FIGS. 1 to 4, a backlight unit for a display panel inspecting apparatus according to an exemplary embodiment of the present invention includes a frame 10, a backlight 20, a light diffusion plate 30, and a polarizing plate. 40 and the control unit 80.

The backlight 20 is installed in the frame 10.

The backlight 20 includes a plurality of light sources arranged at regular intervals.

For example, the backlight 20 may be configured by arranging a plurality of light emitting diodes (LEDs) at regular intervals.

The backlight 20 is formed to have a size corresponding to the size of the display panel 2 of the large screen.

For example, the backlight 20 may be formed in a size corresponding to the size of the display panel 2 having a large or extra large size such as 60 inches, 80 inches, 100 inches, or the like.

The light diffusion plate 30 is installed on an upper surface of the backlight 20.

The light diffusion plate 30 performs a function of diffusing light so that light emitted from each light source of the backlight 20 maintains uniform brightness over the entire surface.

The polarizing plate 40 is installed on the upper surface of the light diffusion plate 30.

The controller 80 controls the pixel to be turned on for each region corresponding to the size of the display panel 2 to be inspected by the backlight 20.

The frame 10 is installed by arranging a plurality of panel detection sensors 72 on the corners to detect the size of the display panel 2 seated on the upper surface.

The panel sensor 72 is installed at the horizontal edge and the vertical edge, respectively, to detect the horizontal length and the vertical length of the display panel 2.

The panel sensor 72 may be configured using various position detection sensors such as infrared sensors and piezoelectric sensors.

A panel seating unit 70 for mounting the display panel 2 is installed at an upper end of the frame 10, and the panel detecting sensor 72 may be installed on the panel seating unit 70.

The controller 80 is configured to control an area in which the backlight 20 is turned on in response to the size of the display panel 2 detected by the panel sensor 72.

For example, in response to the size of the display panel 2 seated on the panel seat 70 based on the lower left vertex of the backlight 20, the horizontal and vertical widths of the light source to be turned on by the controller 80 are determined. Configure to determine the range.

Alternatively, the controller 80 presets a region in which the backlight 20 is turned on in accordance with a standard of the display panel 2 used in various electronic products in advance, so that the controller 80 detects the size of the backlight panel 72. Correspondingly, the predetermined area may be configured to be turned on.

2 and 3, the polarizer 40 of the outer portion where the display panel 2 is not positioned between the display panel 2 and the polarizer 40 mounted on the upper surface of the frame 10. It is also possible to provide a light shielding member 50 covering the upper surface.

The light blocking member 50 includes a frame member 51 formed in a shape corresponding to an edge of the backlight 20, and an up and down light shielding film for shielding while moving up and down through an upper edge of the frame member 51. 54) and left and right light shielding films 52 for shielding while moving left and right through the side edges of the frame member 51.

In addition, the light blocking member 50 further includes a shanghai dongdae 55, a shanghai dong motor 58, a fixed pulley 57, and a belt 59 for moving the up and down light shielding film 54 up and down. do.

The shangdong dongdae 55 is installed at the end of the light-shielding film 54, both ends are inserted into the groove or hole formed in the left and right corners of the frame member 51 to move.

The shandong copper motor 58 is installed at one end of the corner of the frame member 51 on the side where the groove or hole through which the shandong copper 55 moves.

The drive pulley is connected to the shanghai copper 58.

The fixing pulley 57 is installed at the opposite end of the corner on which the shanghai motor 58 of the frame member 51 is installed.

The belt 59 is installed across the driving pulley and the fixed pulley 57 of the shanghai motor 58.

In addition, one end of the shandong band 55 is fixedly connected to the belt 59.

When configured as described above, as the belt (58) is rotated as the motor (58) is operated in the forward or reverse rotation, the shangdongdae (55), one end of which is fixed to the belt (59), the belt (59). The upper and lower portions of the upper and lower light blocking layers 54 block the upper surface of the backlight 20 by increasing and decreasing according to the rotation of the upper and lower light blocking films 54.

The light blocking member 50 further includes a left and right movable table 53, a left and right moving motor 56, a fixed pulley 57, and a belt 59 for moving the left and right light blocking films 52 from side to side. Include.

The left and right moving table 53 is installed at the ends of the left and right light shielding film 52 and both ends are inserted into the grooves or holes formed in the upper and lower corners of the frame member 10 to move.

The left and right movement motor 56 is installed at one end of the corner of the frame member 10 on the side where the groove or hole through which the left and right movement table 53 moves is formed.

A drive pulley is connected to the left and right movement motor 56.

The fixing pulley 57 is installed at the opposite end of the corner where the motor 56 for moving left and right of the frame member 10 is installed.

The belt 59 is installed across the drive pulley and the fixed pulley 57 of the motor for moving left and right.

In addition, one end of the left and right moving table 53 is fixedly connected to the belt 59.

When configured as described above, as the left and right movement motor 56 operates in the forward or reverse rotation, the belt 59 rotates and the left and right slide 52 with one end fixed to the belt 59 is the belt 59. ) Is moved left and right according to the rotation, and the left and right area where the left and right light shielding film 52 blocks the upper surface of the backlight 20 is increased or decreased.

The shanghai motor 58 and the left and right movement motor 56 operate according to a control command of the controller 80 so that the upper and lower light shielding film 54 and the left and right light shielding film 52 shield the upper surface of the polarizing plate 40. To increase or decrease the area.

As shown in FIG. 5, the backlight unit for the display panel inspecting apparatus according to the exemplary embodiment includes a plurality of display panels 2 having a small size to achieve a size closest to the size of the backlight 20. It is also possible to further include a panel tray 90 which is formed to be arranged in a horizontal or vertical arrangement.

When the display panel 2 is installed on the upper surface of the polarizing plate 40 by using the panel tray 90, the panel sensor 90 detects the size of the panel tray 90 to control the controller 80. It is also possible to configure to transmit to.

The controller 80 may also turn on the area of the backlight 20 in response to the size of the panel tray 90.

In the case of using the panel tray 90, the shank east motor 58 and the left and right movement motor 56 in the control unit 80 so that the light shielding member 50 shields the outer portion of the panel tray 90. It is also possible to control.

By using the panel tray 90 configured as described above, when the size of the display panel 2 is small, it is possible to perform inspection on several display panels 2 at a time, thereby greatly improving productivity.

In the above, a preferred embodiment of a backlight unit for a display panel inspecting apparatus according to the present invention has been described. However, the present invention is not limited thereto, and the present invention is not limited thereto. It is possible and this also belongs to the scope of the present invention.

2-display panel, 10-frame, 20-backlight, 30-light diffuser
40-polarizing plate, 50-shading member, 51-frame member, 52-right and left shading film
53-left and right movable stage, 54-up and down curtain, 55-Shanghai Dongdae, 56-left and right movement motor
57-fixed pulley, 58-shanghai motor, 59-belt, 70-panel seat
72-panel sensor, 80-control unit

Claims (6)

A frame, a backlight disposed on the frame and configured to have a plurality of light sources arranged at regular intervals, the backlight having a size corresponding to the size of a large display panel, a light diffusion plate disposed on an upper surface of the backlight, and the light diffusion A polarizer installed on an upper surface of the plate, and a controller configured to control the pixels to be turned on for each region corresponding to the size of the display panel to be inspected with the backlight,
The frame is installed by arranging a plurality of panel sensor in the corner for detecting the size of the display panel seated on the upper surface,
The control unit is configured to control an area in which the backlight is turned on in response to the size of the display panel detected by the panel sensor.
Between the display panel seated on the upper surface of the frame and the polarizing plate is provided a light blocking member covering the upper surface of the polarizing plate of the outer portion where the display panel is not located,
The light blocking member includes a frame member formed in a shape corresponding to an edge of the backlight, an up and down light shielding film for shielding while moving up and down through the upper edge of the frame member, and through the edge of the side surface of the frame member to the left and right. A left and right light shielding film that shields while moving, and is installed at the ends of the up and down light shielding film, both ends of which are inserted into a groove or a hole formed in the left and right corners of the frame member, and a movable pulley is installed at one end thereof; Shanghai motor, which is installed at one end of the corner member of the frame member on which the shanghai dongdae pulley is installed, and the driving pulley is connected, and is installed at the end of the left and right light shielding films, and both ends are upper and lower sides of the frame member. The seat is inserted into the groove or hole formed at the corner and moves, and the left side where the driven pulley is installed A right and left movement motor, which is installed at one end of the corner of the frame member on which the driven pulley is installed, and the left and right movement motor to which the driving pulley is connected, and the Shanghai movement motor and the left and right movement motor of the frame member are installed. Fixed pulleys respectively installed at opposite ends of the corners, the driving pulleys of the Shanghai-dong motor, the driving pulleys of the left-right moving motor and the fixed pulleys, respectively, which are installed across the driven pulleys of the Shanghai-dong belt or the driven members of the left-and-side movement band, respectively. A backlight unit for a display panel inspection device including a belt installed so as to span the pulley. delete delete The method according to claim 1,
The shanghai motor and the left and right movement motors are operated according to a control command of the control unit so that the upper and lower light blocking films and the left and right light blocking films shield the upper surface of the polarizing plate. The method according to claim 1,
And a panel tray formed such that a plurality of display panels having a small size are arranged horizontally or vertically so as to have a size closest to the size of the backlight. The method according to claim 5,
When the display panel is installed on the upper surface of the polarizer using the panel tray, the panel sensor senses the size of the panel tray and transmits the size of the panel tray to the controller, and the controller controls the area of the backlight corresponding to the size of the panel tray. A backlight unit for a display panel inspection device that turns on by setting the lamp.

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