JP2002169134A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform product identification display using a very simple operation, and to briefly perform the operation when the contents of the product identification display is to be corrected. SOLUTION: A light-absorbing resin film is applied to a part of a casing, and information for identifying product is written on the surface of the resin film through laser beam irradiation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to an improvement in a product identification display attached thereto.

[0002]

2. Description of the Related Art A liquid crystal display device has, for example, a product identification display on a housing of the liquid crystal display device in which information such as a product name, a product lot, a manufacturing date, and a revision is written. As the product identification display, a product label in which the above-described information is written is directly attached to a housing of the liquid crystal display device, or a product label directly printed on the housing of the liquid crystal display device, that is, displayed by so-called dot printing. It has been known.

[0003]

However, the method of attaching a product label requires paper, and the work of attaching the paper is complicated. Further, when the content of the product label has to be corrected, it is necessary to peel off the attached paper, and the operation has been complicated. In addition, since the method using dot printing permanently prints on a housing or the like, when the contents have to be corrected, it has been troublesome to delete unnecessary information. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a liquid crystal display device capable of performing product identification and display with a very simple operation. Another object of the present invention is to provide a liquid crystal display device capable of extremely easily performing the operation for correcting the content of the product identification display.

[0004]

In order to achieve the above object, a liquid crystal display device according to the present invention has a light absorbing resin film applied to a part of its housing, and the resin film has a surface. , The information by the scanning of the laser beam is written on the image, and the product identification display is performed. In the liquid crystal display device configured as described above, in creating the product identification display, writing can be instantaneously performed by scanning with a laser beam after the application of the light absorbing resin film, thereby simplifying the operation. To correct the contents of the product identification display, a light-absorbing resin film is formed again on the light-absorbing resin film previously formed (so-called overcoating), and the information of the correct content is scanned by laser scanning. And the correction work can be simplified.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the liquid crystal display device according to the present invention will be described below with reference to the drawings. First, FIG. 2 is a perspective view showing an appearance of a liquid crystal display device according to the present invention. The liquid crystal display device shown in this figure shows what is called a liquid crystal display module 1 before being incorporated in a so-called decorative case.

The liquid crystal display module 1 includes a liquid crystal display panel 1A, a driving circuit (not shown) disposed around the liquid crystal display panel 1A, and a backlight 1B disposed on the back of the liquid crystal display panel 1A. And a frame 2 for accommodating them.

The frame 2 is made of, for example, stainless steel and includes an upper frame 2A disposed on the observer side and a lower frame 2B disposed on the opposite side, and the upper frame 2A and the lower frame 2B are mutually connected. By being swaged, the liquid crystal display panel 1A and the backlight 1
B is arranged at a fixed position without displacement.

In the upper frame 1A, a window (hole) 3 is formed at a position facing the display section of the liquid crystal display panel 1A, so that a so-called window is formed between the outer contour of the upper frame 2A and the window 3. It has a part called a picture frame.

Then, a product identification mark 4 is displayed on a part of the frame portion. The product identification mark 4 has details such as a product name, a product lot, a production date, a revision, etc. as shown in FIG. Information composed of characters (character information) and information (barcode information) 4A obtained by converting these characters into barcodes are described.

As shown in FIG. 1, which is a cross-section taken along the line II of FIG. 2, a light-absorbing resin film 5 is applied to the upper surface of the upper frame 2A. A low light absorbing portion 5a such as a groove formed to expose the upper surface of the upper frame or a groove formed without exposing the upper surface of the upper frame is engraved on the surface. The character information and barcode information as shown in FIG. 3 are described by the portion 5a. In this case, the low-light-absorbing portion 5a formed on the surface of the light-absorbing resin film is formed by scanning with a laser beam.

The product identification 4 formed in this way is
When it is visually observed, the light reflectance of the low-light-absorbing portion 5a on the surface of the resin film 5 is different from the reflectance of light of the other portions, and the low-light-absorbing portion 5a can be clearly recognized. Character information drawn by the low light absorption portion 5a can be confirmed.

Further, as described above, the product identification display 4 includes not only the character information but also the bar code information 4A. As shown in FIG. 4, the product identification display 4 of a large number of liquid crystal display devices sequentially conveyed by a belt conveyor or the like.
Are sequentially read efficiently, for example, via a bar code reader 6 fixed to the ground surface. This is because the work is streamlined.

In this case, the information of each liquid crystal display device read through the bar code reading device 6 is temporarily stored in a computer device, and the information is monitored at that time or when necessary. Can be printed on paper or printed on paper.
Information can be effectively used. Next, a description will be given of an embodiment of a method of forming the product identification display having the above-described configuration.

First, as shown in FIG. 5A, a roll 7 in which a light absorbing resin is applied to a part of an upper frame 2A of a liquid crystal display device sequentially conveyed by a belt conveyor or the like is rotated in contact. As a result, a belt-shaped resin film 5 is formed on the portion. The movement of the roll 7 with respect to the liquid crystal display device (indicated by a dotted line in the figure) is performed automatically.

The liquid crystal display device on which the resin film 5 is formed as described above is transported to a portion where the laser beam irradiation device 8 is disposed, as shown in FIG. A low light absorption portion 5a is formed on the surface of the film 5 by scanning with a laser beam.

The irradiation port of the laser light 8a of the laser light irradiation device 8 is connected to a computer 9 which stores information such as a product name, a product lot, a production date, and a revision input from a terminal in advance, based on the information. The resin film 5 is scanned.
The character information and barcode information composed of the low light absorption portion 5a are engraved on the surface of the. Further, in the case where the product identification display once formed in this way needs to be modified, the above-described steps are repeated as shown in FIG.

That is, a light-absorbing resin is applied again to the place where the product identification mark 4 is formed (the resin film 5 before correction remains and this resin film is denoted by 5B). New information is written by scanning the surface of a simple resin film (this resin film is described as 5A) with a laser beam. In this case, it is not necessary to remove the resin film 5B of the product identification mark 4 before the correction, so that the operation can be simplified.
This is because, even if the resin film 5B of the product identification 4 before modification is left as it is, if a new resin film 5A is formed on the surface thereof, the information written on the resin film 5B cannot be read.

FIG. 7 is a flowchart showing a procedure for forming a resin film, exposing information to the resin film, and forming a resin film when correction is necessary.

In the above-described embodiment, the product identification display is formed on the upper frame of a so-called liquid crystal display module. However, it is needless to say that the lower frame is not limited to this part. Further, the present invention is not limited to the liquid crystal display module, but may be formed on the surface of a case such as a decorative board for accommodating the liquid crystal display module. In this case, it goes without saying that the above-described invention can be applied as it is even if the case is made of a resin material.

[0020]

As is apparent from the above description,
According to the liquid crystal display device of the present invention, the product identification display can be performed by a very simple operation. Further, even when the content of the product identification display is corrected, the operation can be performed extremely easily.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a manufacturing identification display formed on a liquid crystal display device according to the present invention.

FIG. 2 is an external view showing an embodiment of a liquid crystal display device according to the present invention.

FIG. 3 is a plan view showing one embodiment of a manufacturing identification display formed on the liquid crystal display device according to the present invention.

FIG. 4 is a process chart showing one embodiment of a method of forming a resin film to be a base of a manufacturing identification display of a liquid crystal display device according to the present invention.

FIG. 5 is a process diagram showing an embodiment of a method for writing information on a surface of a resin film which is a base of a manufacturing identification display of a liquid crystal display device according to the present invention.

FIG. 6 is a process diagram showing an embodiment of a method for restoring a manufacturing identification display of a liquid crystal display device according to the present invention.

FIG. 7 is a flowchart showing one embodiment of forming and repairing a manufacturing identification display of the liquid crystal display device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device (liquid crystal display module), 1A ... Liquid crystal display panel, 1B ... Backlight, 2A ... Upper frame,
2B: Lower frame, 3: Window (hole), 5: Light absorbing resin film, 5a: Low light absorbing portion.

Claims (5)

[Claims] 1. A liquid crystal display device, wherein a light absorbing resin film is applied to a part of a housing, and the resin film has information on product identification by laser light irradiation on its surface. . 2. A liquid crystal, comprising: a light-absorbing resin film formed on a part of a housing; and product identification information by laser light irradiation written on a surface of the resin film. Display device. 3. The product identification information is characterized by a light-absorbing resin film formed on a part of the housing and a region formed on the surface of the resin film and having a different light absorption rate. Liquid crystal display device. 4. The product identification information according to claim 1, wherein the product identification information includes character information and bar code information obtained by converting the character information into a bar code. Liquid crystal display. 5. A step of forming a light-absorbing resin film by applying a product identification mark formed on a part of the housing to the part, and irradiating the surface of the resin film with a laser beam to obtain a light absorptivity. Forming a low portion and writing information by the portion having a low light absorptance.