JPH1085961A - System for marking manufacturer's serial number - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for marking a manufacturer's serial number, which is different for each kind of products, automatically and accurately without a manual aid. SOLUTION: In the system which is installed in a part of the process for manufacturing a prescribed product, by applying various kinds of film-forming treatment to a transparent substrate 5 through a series of processes, and by marking a manufacturer's serial number (indicated by the marked part 4) on the substrate 5, the following devices are provided: a device 9 for reading product information 8 carried in a part of the transparent substrate 5; a laser generating device 2 for marking the serial number corresponding to the product information, on the prescribed position (marked part 4) of the substrate in accordance with the information read out by the reader device 9; and a control device 1 for controlling the laser generating device 2 so as to mark the serial number in accordance with the product information read out by the reader device 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a serial number stamping device, and more particularly to stamping a serial number according to a type on a glass substrate for a liquid crystal panel constituting the liquid crystal display device during a manufacturing process of the liquid crystal display device. For stamping a serial number.

[0002]

2. Description of the Related Art In recent years, a liquid crystal display device has been used as a so-called panel type display device for displaying various images. In particular, a color liquid crystal display device capable of displaying a full-color image has been widely used.

This color liquid crystal display device has at least two
A liquid crystal is sandwiched between two transparent substrates, a plurality of transparent electrodes that cross each other are formed on each of the two transparent substrates, and a simple matrix type in which pixels are formed at intersections of the transparent electrodes, and a color filter are used. A liquid crystal is sandwiched between one of the formed transparent substrates (color filter substrate: CF substrate) and the other substrate (TFT substrate) on which a number of switching elements such as thin film transistors are formed, and an active element that forms a pixel with the switching elements. -A matrix type liquid crystal display device is known.

[0004] The prior art of the liquid crystal display device is disclosed in, for example, Japanese Patent Publication No. 51-13666 and Japanese Patent Application Laid-Open No. 63-309921.

Since a glass substrate is generally used as the transparent substrate, a transparent substrate will be described below as a glass substrate, but the same applies to a transparent substrate other than a glass substrate.

[0006] In the manufacturing process of this type of liquid crystal display device, by engraving a serial number corresponding to the type of the device to be manufactured on the glass substrate, multi-type production can be efficiently performed on a common manufacturing line.

FIG. 4 is an explanatory view of a schematic manufacturing process on the color filter substrate side for explaining the manufacturing of the liquid crystal display device.

First, a glass substrate for a color filter substrate is carried into a line, and is washed to clean the surface of the glass substrate (step A). A mixed material of a black matrix (BM) film material, which is a light-shielding film of a color filter, and a photosensitive material is applied to the glass substrate, dried (step B), and exposed through an exposure mask having a black matrix pattern. (Step C). At this time, a pattern of the type information is also provided in a part outside the effective area of the exposure mask.

After the mask is exposed, it is developed and dried to form a black matrix (Step D). At this time,
At the time of exposure, type information is simultaneously formed on the black matrix film. The type information includes the type (simple matrix type, TFT type) and size of the liquid crystal panel.

[0010] Thereafter, a production number in accordance with the above-mentioned type information is stamped at a predetermined position outside the effective area of the glass substrate with a laser beam or the like (step E).

The glass substrate on which the manufacturing number is imprinted is passed to a color filter forming process for sequentially forming color filters of each color, and is made of a plurality of colors (generally three colors of red, green and blue) partitioned by a black matrix. A color filter is formed (Step F).

The color filter substrate is bonded to a separately manufactured TFT substrate (step G), and liquid crystal is injected into a gap between the two and sealed to form a liquid crystal panel (step H). A module is obtained by combining the liquid crystal panel with optical members such as a polarizing plate and a prism plate, a drive circuit board, a backlight, and other necessary components (Step I). The module is shipped after the final shipping inspection (process J).

The above-described steps are merely examples, and the contents of each step vary.

FIG. 5 is a schematic diagram for explaining an example of a serial number stamping device used in a serial number stamping step in the manufacturing process of the liquid crystal display device, wherein 1 is a control device, 2 is a laser generator, and 3 is a laser. Light, 4 is a stamped part (serial number), 5 is a color filter substrate, 6 is a substrate support pin, 7
Denotes an XY moving stage, and 10 denotes data input means.

In FIG. 1, a glass substrate 5 on which a black matrix is formed is carried into a serial number marking device, and is placed on substrate support pins 6 of an XY moving stage 7.

The control device 1 controls the laser beam irradiation conditions for forming information such as letters and numbers of the laser generator and controls the movement of the XY moving stage 7 so that the manufacturing number marking position of the glass substrate 5 can be determined. decide.

The control device 1 includes a glass substrate 5 to be carried in.
Information (manufacturing number code: stamp code) and the position of the stamp on the glass substrate are input manually.

The controller 1 moves the XY moving stage 7 in accordance with the input, controls the laser generator, and imprints a predetermined serial number on a predetermined position.

[0019]

In the above-mentioned conventional technique, there is a troublesome work that the marking conditions such as a marking position and a marking code must be re-entered every time the type is changed, and an input error is reduced. There has been a problem that this may cause a product defect as it is, and in the worst case, the production line may be stopped.

An object of the present invention is to provide a serial number stamping device which can automatically and accurately engrave a different serial number for each product type without manual operation by solving the above-mentioned problems of the prior art. It is in.

[0021]

In order to achieve the above-mentioned object, according to the present invention, product type information written on a glass substrate is automatically read, and a serial number is automatically set at a predetermined position on the glass substrate according to the read information. It is configured so as to be engraved.

That is, according to the first aspect of the present invention, a transparent substrate is installed in a part of a manufacturing process of performing a variety of film forming processes through a series of processes to manufacture a predetermined product. A serial number stamping device for stamping a serial number on the transparent substrate, a type information reading device for reading type information carried on a part of the transparent substrate, and the transparent substrate according to the type information read by the type information reading device. A laser generator for engraving a serial number according to the type information at a predetermined position, and a control device for controlling the laser generator so as to engrave a serial number according to the type information read by the type information reader. It is characterized by having.

According to this configuration, the serial number is accurately engraved without manual operation, and the engraving of the number is prevented.

According to a second aspect of the present invention, a transparent substrate is installed in a part of a manufacturing process for performing various film forming processes through a series of processes to manufacture a predetermined product. In a serial number marking device for marking a serial number on the transparent substrate, an XY movable in a plane parallel to a plane of the transparent substrate with the transparent substrate partially carrying the type information placed thereon.
A moving stage, a type information reading device that reads type information carried on a part of the transparent substrate placed at a position facing the transparent substrate placed on the XY moving stage, and a predetermined type of the transparent substrate. A laser generator for engraving the serial number at the position of the product, and a data table in which the serial number data according to the type information to be manufactured and the engraved position data are stored in advance, and the laser is driven under the driving conditions suitable for the type information. A control device for controlling the generation device and controlling the movement of the XY movement stage, and a serial number corresponding to the serial number information output from the data table according to the type information read by the type information reading device. Is marked on a predetermined position of the transparent substrate.

According to this configuration, a predetermined serial number is automatically and accurately imprinted on a predetermined position of the transparent substrate, thereby preventing imprinting of the number.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to examples.

FIG. 1 is a schematic diagram for explaining the configuration of an embodiment of a serial number marking device according to the present invention, wherein 1 is a control device, 1a is a data table, 2 is a laser generator,
Is a laser beam, 4 is an engraved portion (serial number position), 5 is a color filter substrate, 6 is a substrate support pin, 7 is an XY movement stage, 8 is type information (type code), 9 is type information (type code). ) A reading device.

In this embodiment, the present invention is applied to a device for marking a serial number on a color filter substrate (glass substrate) of a liquid crystal panel constituting a liquid crystal display device.

In FIG. 1, the control device 1 controls the laser generator 2 and the XY moving stage 7 based on the type information of the glass substrate read by the type information reading device 9.
Control. The type information described in FIG. 4 is formed on the glass substrate 5 simultaneously with the black matrix.
The glass substrate 5 is carried into the XY moving stage 7, and the type information reading device 9 reads the type information in a state where the glass substrate 5 is horizontally held by the substrate support pins 6, and supplies the type information to the control device 1.

The type information reading device 9 is provided with a video camera preferably using a CCD, processes image signals of the image data, recognizes the type information formed on the glass substrate, and gives the recognition data to the control device 1. is there.

The control device 1 determines in advance the type of color filter substrate (for a simple matrix type liquid crystal panel, for an active matrix type liquid crystal panel, type according to size and definition,
Etc.), a data table 1a is described in which the manufacturing number code, the engraving position information of the glass substrate, the irradiation condition of the laser beam, and the like are described.

The laser generator 2 generates a laser beam based on the various control data input from the controller 1, and stamps a serial number on a designated position on the glass substrate 5.

The XY moving stage 7 holds the loaded glass substrate 5 horizontally with the substrate support pins 6 and moves the glass substrate 5 in a plane so that the marking position designated by the control device is irradiated with the laser beam 3. The glass substrate 5 is moved in two directions.

FIG. 2 is a plan view of the glass substrate for explaining the product type position and the serial number marking position on the glass substrate. In this example, a so-called four-sheet glass substrate is shown.

In the figure, the glass substrate 5 has panel regions A, B, C, and D corresponding to four color filter substrates.
The product information 8 is written in one corner of the display. This product code is formed at the same time when the black matrix is formed on the glass substrate. Then, the production number 11 is engraved on each corner of each of the panel areas A, B, C, and D by a laser.

The glass substrate 5 on which the manufacturing number is imprinted is transferred to the subsequent color filter forming process.

According to this embodiment, a predetermined serial number 11 is automatically and accurately stamped at a predetermined position on the glass substrate 5, thereby preventing imprinting of the serial number.

FIG. 3 is an exploded perspective view for explaining an example of the configuration of a liquid crystal display module assembled using a liquid crystal panel manufactured by engraving a serial number according to the present invention.
Is an upper frame, 20a is a display window, 21 is a color liquid crystal panel, 22a, 22b and 22c are printed circuit boards, 23
a and 23b are spacers, 24 is a light shielding sheet, 25 is a light guide, 26 is a backlight lamp, 27 is a lamp cover,
28 is an intermediate mold, 29 is a lower frame, 30 is a cut-and-raised piece, and 31 is a cutout hole.

On the periphery of the color liquid crystal panel 21, printed circuit boards 22a, 22b, 2
2c is attached.

Then, a light guide 25 is laminated on the back surface,
A backlight lamp 26 is installed on one side thereof, and the backlight cover 2 and the light shielding sheet 24 are used to form the backlight lamp 2.
6 is prevented from leaking to the color liquid crystal panel 21 side.

Spacers 23a and 23b are interposed between the color liquid crystal panel 21 and the upper frame 20, and the light guide 25
And backlight lamp 26 and color liquid crystal panel 21
Is attached to the intermediate frame 28, and the cut-and-raised pieces 30 formed in the upper frame 20 are inserted and fixed in the cutout holes 31 formed in the lower frame 29 to assemble the integrated color liquid crystal display module.

The liquid crystal display module assembled in this way is used as an image display device for personal computers, word processors, and other electronic devices.

In the above-described embodiment, the object on which the serial number is stamped is the image forming apparatus substrate constituting the color filter substrate of the liquid crystal panel. However, the present invention is not limited to this. In addition, the present invention can be applied to not only a liquid crystal display device, but also a stamping of a serial number of various types of electronic devices manufactured on a common manufacturing line. .

[0044]

As described above, according to the present invention,
By using a data table that stores information for engraving the type and serial number in advance on the transparent substrate carrying the type, it is possible to automatically engrave a predetermined serial number consisting of characters and symbols at a predetermined position. It is possible to prevent the number engraving error by manually inputting the engraving information for each product type, thereby enabling efficient production in multi-product production.

Further, since the confirmation of the type is also automated, labor saving can be achieved, and a serial number marking device which greatly contributes to the improvement of the yield can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of an embodiment of a production number marking device according to the present invention.

FIG. 2 is a plan view of the glass substrate for explaining a product type position and a serial number engraving position on the glass substrate.

FIG. 3 is an exploded perspective view illustrating a configuration example of a liquid crystal display module assembled using a liquid crystal panel manufactured by engraving a serial number according to the present invention.

FIG. 4 is an explanatory diagram of a schematic manufacturing process on the color filter substrate side for explaining the manufacturing of the liquid crystal display device.

FIG. 5 is a schematic diagram illustrating an example of a serial number stamping device used in a serial number stamping step in a liquid crystal display device manufacturing process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Controller 1a Data table 2 Laser generator 3 Laser beam 4 Marking part (serial number) 5 Color filter substrate 6 Substrate support pin 7 XY movement stage 8 Type information (type symbol) 9 Type information (type symbol) reading device .

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor O ▲ Daka ▼ Takashi 3681 Hayano, Mobara City, Chiba Prefecture Within Hitachi Device Engineering Co., Ltd. (72) Inventor Yuichi Nishimura 3300 Hayano, Mobara City, Chiba Prefecture Hitachi, Ltd. Within the business division

Claims (2)

[Claims] 1. A serial number which is installed in a part of a manufacturing process of manufacturing a predetermined product by applying various film forming processes to a transparent substrate through a series of processes, and engraving a serial number on the transparent substrate. In a marking device, a type information reading device for reading type information carried on a part of the transparent substrate, and a manufacturing device according to the type information at a predetermined position on the transparent substrate according to the type information read by the type information reading device. A production number marking device, comprising: a laser generation device for marking a number; and a control device for controlling the laser generation device so as to mark a production number corresponding to the type information read by the type information reading device. . 2. A serial number which is installed in a part of a manufacturing process of manufacturing a predetermined product by applying various film forming processes to a transparent substrate through a series of processes, and engraving a serial number on the transparent substrate. An engraving device, comprising: an XY moving stage capable of mounting the transparent substrate partially carrying the type information and moving in a plane parallel to a plane of the transparent substrate; and mounting the transparent substrate on the XY moving stage. A kind information reading device that reads kind information carried on a part of the transparent substrate provided at a position facing the transparent substrate,
A laser generator for engraving a serial number at a predetermined position on the transparent substrate, and a data table pre-stored with serial number data according to the type information to be manufactured and its engraving position data and adapted to the type information. A control device for controlling the laser generator under driving conditions and controlling the movement of the XY moving stage, wherein the serial number information output from the data table according to the type information read by the type information reading device. A serial number corresponding to the serial number is imprinted on a predetermined position of the transparent substrate.