JPH10307668A - Protection film for panel member and method for protecting panel member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the protection film for a panel member which can protect the panel member against dirt, dust, etc., and the method for protecting the panel member. SOLUTION: Protection films 21 and 22 are laminated in a peelable state on one or both the surfaces of the panel member 20 which has an effective area A and also has a member or component built in outside the effective area. The protection films have perforations 100 for cutting at positions corresponding to the outside of the effective area and when the members or components 90 and 91 are built in, the protection films are cut along the perforations to peel the protection film parts outside the effective area. After the members are built in, the remaining protection films are peeled off. This constitution makes the panel member very hard to have a flaw, dirt, dust, etc., and the handling is made easy to shorten the operation time at the time of assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective film for a panel member and a method for protecting a panel member, and more particularly, to a display panel of a display device such as a liquid crystal display or a plasma display, or to a display device. The present invention relates to a protection film for protecting a panel member such as an input panel of a coordinate input device such as a touch panel or a tablet to be arranged, and a protection method for protecting the panel member.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned display device or coordinate input device is, for example, shown in FIG. 1 (schematic external view) and FIG.
As shown in FIG. 1 (a schematic sectional view taken along the line II in FIG. 1), a display unit such as a liquid crystal display or a plasma display and a coordinate input unit constituting a touch panel or a tablet are provided in a main body 10 having a substantially rectangular parallelepiped outer shape. Is installed. When only the display means is used, the display device is simply a display device. When the coordinate input device is installed together, the display device is a so-called integrated input / output display device. For simplicity of description, a schematic configuration in the case of an input / output integrated display device including a display unit and a tablet will be described below.

In the main body 10, coordinate input means and display means are overlapped and provided integrally. On one surface of the main body 10, an input plate 20, which is an input surface of the coordinate input means, is provided. The input plate 20 is fixed to the upper housing 50 forming the main body 10 by screwing, fitting or bonding. On the lower surface of the input plate 20, a display means, for example, a liquid crystal display (LCD) 30 is provided. The LCD 30 is the main body 1
0 is fixed to the lower housing 60 by the same method as described above. The upper housing 50 is provided with an opening for opening an effective display area, which is a display area of the LCD 30, or an effective input area, which is an input enable area of the coordinate input means, which is equal to or larger than the effective area. ing. Although a predetermined gap is provided between the input plate 20 and the LCD 30, a shielding means 80 made of rubber, foam rubber, or the like is provided on the four sides outside the effective area so that dust or the like is not mixed in the gap. Is provided.

The input plate 20 has various configurations according to the type of the coordinate input means. For example, when the coordinate input means is of a so-called resistive type (pressure-sensitive type), a configuration in which two or more glass plates or resin films each having a transparent resistor are laminated. In the case of the so-called capacitive coupling method or electromagnetic induction method, the plate is made of one or more sheets of glass or resin having a line-shaped or loop-coil-shaped transparent electrode pattern in the X and Y directions. . In the case of a so-called ultrasonic system in which the position coordinates of the pen 40 are derived by detecting vibrations propagating in the input plate 20, the input plate 20 is a plate made of glass or resin.

[0005] A printed circuit board 7 provided with various necessary circuit devices or circuit elements is provided below the LCD 30.
0 is placed.

In such a configuration, the operator operates the pen 4
By bringing 0 close to or in contact with the input plate 20,
The position coordinates of the pen 40, that is, the input point, are detected by the coordinate input means, and output to a personal computer (not shown) from the coordinate input means. A predetermined function, for example, execution of a menu command is performed by the personal computer based on the output result of the position coordinates of the input point. In addition, a point corresponding to the position of the pen 40 can be displayed on the LCD 30 by an LCD drive circuit (not shown). When the input by the pen 40 is performed continuously, the trajectory of the operation of the pen 40 can be displayed on the LCD 30 by connecting the input points detected at a predetermined sampling rate with a line. Furthermore, by identifying and determining the trajectory, recognition of a character or a figure, execution of a gesture command, and the like can be performed.

The above is a schematic configuration and operation of an input / output integrated display device comprising a display means and a tablet. However, if a CPU or the like is provided in the main body 10 instead of the personal computer, a so-called pen input computer is used. Becomes Also, instead of a tablet, the resistive film method (pressure-sensitive method)
Alternatively, in the case of an optical type touch panel, the pen 4
The input as described above can be made by a finger instead of 0. In the case where only a display device is used, the monitor serves as a so-called personal computer monitor.

[0008]

In the above-mentioned display device, a protective film is applied to a desired surface at the time of parts processing in order to prevent scratches, dirt, dust and the like during manufacturing (assembly). This protective film is provided on a panel surface of a panel member such as a display panel such as an LCD as a display means, which is a main component of the apparatus, or an input panel such as an input plate of a coordinate input means. However, this protective film is peeled off at a predetermined step of the assembly process, for example, a step where the protective film is unnecessary or obstructive, a step where the film cannot be peeled off from the next step, a step at the time of shipping check or unpacking, etc. It is. Therefore, when there is an assembling process thereafter, careful handling is required to prevent scratches, dirt, dust adhesion, and the like, and the working time becomes longer.

These operations are usually performed on a clean bench, but may be performed in a clean room in some cases. In the case where dirt, dust and the like are attached, a removal operation is required. Furthermore, in the event of damage, the only option is to disassemble or recycle the disposable part.
After the assembly is completed, for example, the input plate 20 and the LCD 30
If dirt, dust, or the like is attached to the gap between them, the product becomes a defective product. As described above, there is a major problem that the cost of the apparatus is increased.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve such problems, and a protective film for a panel member capable of protecting the panel member from dirt, dust and the like, and a method of protecting the panel member. The task is to provide

[0011]

According to the present invention, a protective film for a panel member, which is releasably laminated on a panel surface of a panel member having an effective area, comprises a sewing machine for cutting at a portion located outside the effective area. An eye is formed and configured to be cut along the perforations and peelable from the panel member.

Further, in the method of the present invention for protecting a panel member having an effective area and incorporating a member or a part outside the effective area, a cutting perforation is formed at a position corresponding to the outside of the effective area. The protective film was laminated on one side of the panel member in a releasable manner, the protective film was cut along the perforations to peel off the protective film portion outside the effective area, and the member or component was incorporated into the exposed panel portion, and then In addition, a configuration in which the remaining protective film is peeled off is adopted.

Further, in the present invention, the protective film is laminated on both sides of the panel member so as to be peelable, and the protective film on one side is cut along the perforation to peel off the protective film portion outside the effective area and expose the protective film. Incorporate the member or component on the surface of the panel part, peel off the protective film remaining on one side of the panel member, cut the protective film on the other side along the perforation and peel off the protective film part outside the effective area, A configuration is also adopted in which a member or component is assembled on the exposed surface of the panel portion, and then the protective film remaining on the other surface of the panel member is peeled off.

In such a configuration, before the members or components are incorporated into the outer peripheral portion of the effective area of the panel member at the time of assembling and the protection becomes unnecessary, or when the protective film disturbs the assembling, the perforation is performed. Along with this, only a part of the protective film can be easily separated from the panel member. In addition, since the protective film in the effective area does not disturb parts during assembly, it does not become a hindrance at the time of assembling. The protective film of the part can be peeled off. This makes it extremely difficult for the panel member to be scratched, stained, dusted, etc., facilitates handling, and shortens the working time during assembly. Therefore, work on a clean bench is possible, furthermore, there is no need to remove dirt, dust, etc., furthermore, the amount of disposal due to scratches or disassembly of reusable parts is drastically reduced. realizable.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

[First Embodiment] In this embodiment, application of the present invention to an information device, for example, a pen input computer will be described. The configuration of the pen input computer is the same as the configuration of the information device shown in FIGS. 1 and 2, and a duplicate description will be omitted.

As shown in FIG. 1, the pen input computer has a substantially rectangular input plate 20 on one surface, and a substantially rectangular parallelepiped is formed by an upper housing 50 and a lower housing 60 having the input surface of the input plate 20 as an opening. A main body 10 having an external shape is formed.
In the main body 10, an LCD 30 and a printed circuit board 70 arranged under the LCD 30 are provided.

As shown in FIG. 3, on the printed circuit board 70, a digitizer control circuit 8, a main body CPU 5, various memories 6, an LCD driver 7, a drive circuit 71 for driving the input pen 40, and signals from the sensor 90 are detected. Detection circuit 7
2. In addition, various circuits and circuit elements such as an inverter, a DC-DC converter, and various connectors are mounted. The printed circuit board 70 is composed of a plurality of sheets as necessary.

The coordinate input means in the pen input computer according to the present embodiment is of a so-called ultrasonic utilizing type as disclosed in Japanese Patent Application No. 61-149742, and the input plate 20 is a transparent vibration transmission plate made of glass. . Vibrating pen 40
Is transmitted through the vibration transmitting plate and is detected by sensors 90 provided at the four corners of the vibration transmitting plate, and the propagation time of the vibration is obtained. The distance between the sensors 90 is calculated, and the position coordinates of the pen 40 are derived from the three-square theorem.

In the above configuration, the pen 4 is
The point or trajectory input by 0 is detected by the coordinate input means and displayed on the LCD 30 in real time by the main body CPU 5, LCD driver 7, and the like. Thus, a pen input computer capable of inputting / outputting various kinds of information with one pen 40 without using a keyboard can be realized.

In the above configuration, the main feature of the present invention is:
An input plate 20, a protective film 21 for protecting a panel member such as an input panel such as an LCD 30 or a display panel;
22 will be described.

In this embodiment, the protective film 2
As shown in FIG. 4A, the reference numerals 1 and 22 are laminated on both sides of the input plate 20 of the coordinate input means with an adhesive property enough to be peeled off manually by an operator. These protective films 21 and 22
On both sides, as shown in FIG. 5, a perforation 100 is formed in a frame shape outside the effective input area A of the coordinate input means by a predetermined distance.
Is formed, so that the operator can peel off only the protective films 21 and 22 in the portion outside the effective area along the perforations 100.

In the assembling process, first, the sensor 90 is bonded to the input plate 20 and the input plate 20 is fixed to the input plate holder 91 having an opening larger than the effective area by screwing or bonding with a double-sided tape. The input plate holder 91 is provided with an electrode member for extracting an electric signal from the sensor 90, an amplifier circuit for amplifying the electric signal, a signal processing circuit for processing the signal, and the like.

In this step, the sensor 90 of the input plate 20
The protective film 22 on the lower surface of FIG. 4B, which is the surface to be bonded and the surface that comes into contact with the input plate holder 91, becomes unnecessary or obstructive. Therefore, when assembling the sensor and assembling it into the holder, only the protective film 22 outside the effective area on the lower surface of the input plate 20 is peeled off along the perforations 100. Needless to say, there is no adhesion of scratches, dirt, dust and the like on the surface from which the protective film 22 has been peeled off. In this step, a unit of the coordinate input means is completed. In this state, the portion where the harvesting film 22 is peeled off and exposed to the outside is narrow, and the input plate holder 91 protrudes from this portion. Adhesion of scratches, dust, etc. can be prevented.

Next, as shown in FIG.
The unit of the display means having the backlight and the like installed in the LCD holder 92 and the unit of the coordinate input means are integrated by screws or the like. In this step,
Since the protection film 22 cannot be peeled off thereafter, the protection film 22 remaining inside the effective area on the lower surface of the input plate 20 is peeled. This step completes the input / output unit.

In this step, if dust or the like is mixed between the input plate 20 and the LCD 30, it becomes a defective product. Therefore, it is desirable to perform the operation on a clean bench. Since the four sides of the unit are formed without gaps by the input plate holder 91 and the LCD holder 92, the input plate 20 and the LC
The possibility that dust or the like is mixed with the D30 is extremely low. In this step, the LCD 3 provided as needed
It goes without saying that the protective film (not shown) on the 0 surface is peeled off.

Next, as shown in FIG. 4D, the input / output unit is fixed to the lower housing 60 by screws or the like, and the upper housing 50 is fixed to the lower housing 60 by screws or the like. Complete. In this step, the protective film 21 outside the effective area on the upper surface of the input plate 20 disposed below the upper housing 50 is peeled off along the perforations 100.
In the same manner as described above, the surface where the protective film 21 has been peeled off has scratches,
Needless to say, there is no adhesion of dirt and dust.

Next, in the inspection process of the device, the input plate 2
0 Protective film 21 remaining inside effective area on upper surface
Is peeled off. After this step, only packing and shipping are performed, and by taking some care in handling, the possibility that scratches, dust, and the like adhere to the inside of the effective area on the upper surface of the input plate 20 can be extremely reduced. If the inspection can be performed without removing the protective film 21, the package may be packed and shipped without removing the protective film 21, and the user may peel off the protective film 21.

As can be understood from the present embodiment, by applying the present invention, it is possible to assemble the apparatus with the minimum necessary precautions and equipment, and it is possible to produce the apparatus at a much lower cost than before. Becomes possible.

[Other Embodiments of Harvesting Film] In the above embodiment, the protective films 21 and 22 having the frame-shaped perforations 100 have been described, but the present invention is not limited to the above. The configuration of another perforation will be described.

As shown in FIG. 6, two perforations 101 may be provided outside the pair of effective areas facing each other on the protective film 22 on the lower surface of the input plate 20. In this case, the sensor 90 is arranged at a portion outside the effective area peeled along the perforation 101, and the input plate 20 is attached to the input plate holder 91 at this portion and installed. In this configuration, when the protective film 22 in the form of a roll is laminated on the input plate 20 while being extended, the direction of the perforation 101 is set to the extending direction of the protective film 22 so that the input plate 20 and the protective film 22 are positioned in the extending direction. Only in the direction perpendicular to the axis (the axial direction of the pressure roller of the laminate), lamination is facilitated. In addition, the perforation 101 can be formed on the protective film 22 by simply feeding out the roll-shaped protective film 22 and cutting the perforation 101, so that an inexpensive apparatus can be realized.

Further, as shown in FIG. 7, perforations 102 may be formed at a predetermined pitch so as to connect the two perforations 101 perpendicularly to the two perforations 101. In this configuration, as in the first embodiment, only the harvesting films 22 on the four sides outside the effective area can be peeled off. Also in this configuration, the positioning at the time of lamination may be performed in only one direction, and the perforation 102 can be easily cut only by adding the roller-shaped cutter as described above,
An inexpensive device becomes possible.

The present invention can be applied to any perforated shape, such as a dotted line, a dashed line, or a half-blanked shape.

[Other Embodiments] The fixing of the input plate is not limited to the above-described embodiment, and may be any of an upper housing, a lower housing, a display means unit, and the like. Needless to say, the protective film outside the effective area can be appropriately peeled off.

It goes without saying that the protective film may be laminated on the input plate on one side.

Further, the present invention is also suitable when the input plate is made of a transparent resin such as acrylic instead of glass. In this case, the protective film has a great effect on a resin that is more easily damaged than glass.

The input plate may have been subjected to various treatments such as a non-glare treatment (frost treatment) for improving optical characteristics and a low-reflection coating on the glass.

The present invention can also be applied to a multi-layer structure in which a film is laminated on a glass plate to prevent scattering of glass fragments when the glass is broken or to improve optical characteristics. Films are generally more fragile than glass, and the protective film on the film has a great effect.

The method of the coordinate input means is not limited to the method of the above embodiment, and the present invention can be applied to any method such as an electromagnetic induction method, an electrostatic coupling method, a resistance method, and an optical method. Needless to say, the type of the display means is not limited to the liquid crystal type of the above embodiment.

In the above-described embodiment, the configuration of the pen input computer incorporating the CPU and the like has been described. However, the configuration is not limited to the configuration connected to the personal computer or the like. If so, the present invention is applied. Naturally, the present invention is also applied to a protective film on the panel surface of the display means in the case of only the display means, or a protective film disposed on the front of the display means or a filter member.

Of course, the present invention is not limited to the size of the effective area, and can be applied to devices of various sizes from a small portable size for individuals that can be carried in a bag or the like to a large so-called electronic blackboard size. Needless to say.

[0042]

As described above, according to the present invention, only a part of the protective film can be easily peeled off from the panel member along the perforation, so that the protection by the protective film at the time of manufacture becomes unnecessary. Since the protective film can be appropriately peeled off at the stage when the protective film becomes obstructed or obstructs the panel member, scratches, dirt, dust, etc. are extremely unlikely to be attached to the panel member, and handling becomes easy. An excellent effect that the working time can be reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of an information device to which the present invention is applied.

FIG. 2 is a cross-sectional view taken along line II of FIG.

FIG. 3 is a block diagram showing a circuit mounted on a circuit board.

FIG. 4 is a process diagram showing a process of protecting the panel member.

FIG. 5 is an explanatory view showing a first embodiment of perforations formed on a protective film.

FIG. 6 is an explanatory view showing another embodiment of a perforation formed on the protective film.

FIG. 7 is an explanatory view showing still another embodiment of a perforation formed on a protective film.

[Explanation of symbols]

 Reference Signs 20 input board 21, 22 protective film 30 LCD 40 input pen 100, 101, 102 perforation

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hajime Sato 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Atsushi Tanaka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inside the corporation

Claims (6)

[Claims] 1. A protective film for a panel member which is releasably laminated on a panel surface of a panel member having an effective area, wherein a perforation for cutting is formed in a part of the protective film located outside the effective area, and the protective film is formed. A protective film for a panel member, which is cut along a perforation so as to be peelable from the panel member. 2. The method according to claim 1, wherein the protective film is provided on an upper surface of the panel member and / or
Or a laminate on the lower surface.
3. The protective film for panel members according to item 1. 3. The protective film according to claim 1, wherein the panel member is a display panel of a display device or an input panel of a coordinate input device. 4. A method of protecting a panel member having an effective area and incorporating a member or a part in an outer portion of the effective area, comprising: forming a protective film having a perforation for cutting at a position corresponding to the outside of the effective area. Laminate removably on one side of the panel member, cut the protective film along the perforation, peel off the protective film part outside the effective area, install the member or component on the exposed panel part, and then leave the remaining protection A method for protecting a panel member, comprising peeling a film. 5. A method for protecting a panel member having an effective area, wherein a member or a component is incorporated in an outer portion of the effective area, wherein a protective film having a cutting perforation formed at a position corresponding to the outside of the effective area is provided. Laminate on both sides of the panel member so that it can be peeled off, cut one side of the protective film along the perforation, peel off the protective film part outside the effective area, incorporate the member or component on the exposed panel part surface, Peel off the protective film remaining on one side of the member, cut the other side of the protective film along the perforations, peel off the protective film part outside the effective area, and incorporate the member or component on the exposed panel part surface After that, a method of protecting the panel member, wherein the protective film remaining on the other surface of the panel member is peeled off. 6. The method according to claim 5, wherein the panel member is a display panel of a display device or an input panel of a coordinate input device.