KR20100115529A - Touch window rework and cleansing method - Google Patents

Touch window rework and cleansing method Download PDF

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Publication number
KR20100115529A
KR20100115529A KR1020090034149A KR20090034149A KR20100115529A KR 20100115529 A KR20100115529 A KR 20100115529A KR 1020090034149 A KR1020090034149 A KR 1020090034149A KR 20090034149 A KR20090034149 A KR 20090034149A KR 20100115529 A KR20100115529 A KR 20100115529A
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KR
South Korea
Prior art keywords
touch sensing
sensing unit
separation
inclined surface
injected
Prior art date
Application number
KR1020090034149A
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Korean (ko)
Inventor
이준규
Original Assignee
주식회사 엔엑스
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Priority to KR1020090034149A priority Critical patent/KR20100115529A/en
Publication of KR20100115529A publication Critical patent/KR20100115529A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In General (AREA)

Abstract

Method for separating and cleaning a touch sensing unit or a touch sensing unit part layer for regeneration of a touch sensing unit or a liquid crystal display unit or a substrate (for example, tempered glass) attached to the unit in a liquid crystal display unit equipped with a touch sensing unit A method comprising: a first step of forming a gap between a separation object and a non- separation object; And a second step of injecting cooling gas into the gap.

Description

Touch Window Rework and Cleansing Method for Touch Sensing Unit Regeneration

The present invention relates to a method for reproducing a touch sensing unit, and more particularly, to at least some layers of the touch sensing unit or the touch sensing unit without possible damage so as to separate and reuse the touch sensing unit mounted on the liquid crystal display unit. A separation and cleaning method for separating and cleaning the same.

In general, the touch sensing unit is installed above an image display device such as a liquid crystal display (CRT), a cathode ray tube (CRT), a plasma display panel (PDP), etc., such as an electronic notebook, a cash machine, a mobile communication terminal, and a game machine. Thus, the user presses the Indium Tin Oxide (ITO) film of the touch sensing unit while watching the image display device, thereby providing convenience so that the user can directly input predetermined information while viewing the predetermined information on the computer.

The touch sensing unit is classified into capacitive overlay, infrared beam, and resistive overlay. A transparent conductive thin film is used on the upper and lower surfaces facing each other. When a certain pressure is applied to a certain point or more, a resistive film type of a method in which the upper and lower conductive films contact each other and the controller grasps the contact position thereof and inputs information is most commonly used.

FIG. 1 schematically illustrates a cross section of a liquid crystal display unit 120 in which a resistive touch sensing unit 130 is commonly used.

As shown in FIG. 1, the touch sensing unit 130 includes an ITO film layer 18 and a light emitting unit 16 and is disposed above the liquid crystal display unit 120. In general, the touch sensing unit 130 has a structure in which a transparent acrylic layer 15, a graphic processing layer 14, an ITO film layer 18, and a protective film 10 are sequentially stacked by an adhesive 17. Detect user's physical contact The light emitting unit 16 is electrically connected to the main circuit board (not shown) to provide light to the transparent acrylic layer 15. In addition, the ITO film layer 18 is positioned below the upper ITO film layer 11, the upper ITO film layer 11, and the lower ITO film layer 13 and the upper ITO film layer, the lower ITO electrode layer is formed It is composed of a dot spacer 12 provided between the 11 and the lower ITO film layer 13 to maintain a constant gap between the two ITO electrode films.

Since the touch sensing unit 130 made in this way requires a relatively small installation space, it can be installed in a small device such as a mobile communication terminal.

By the way, since the touch detection unit 130 or the liquid crystal display unit equipped with the above-described advantages are defective inspection is performed in a state in which the two units are combined, there is a problem that both units should be discarded if a defect occurs in any one unit. have.

Accordingly, recently, the touch sensing unit 130 and the liquid crystal display unit 120 are separated, or some layers of the touch sensing unit 130 are separated, thereby at least one component (for example, the touch sensing unit or the liquid crystal display). A method of regenerating and using the unit or the tempered glass attached to these members is under consideration. Figure 2 illustrates one such method.

In the conventional method of separating the touch sensing unit 130, as shown in FIG. 2, the thin precision wire 200 is positioned between the touch sensing unit 130 and the liquid crystal display unit 120 at one side of the corresponding device. In the state where both ends of the thin precision wire 200 is securely fixed to the moving means, the two units 120 and 130 are separated by moving to the other side of the device.

This method has an advantage that can be easily used because the processing method is very simple, but when the precision wire 200 is incorrectly positioned or the cross-sectional diameter of the precision wire 200 is too large or too small as shown in FIG. 3. The two units cannot be separated smoothly. That is, when the precision wire 200 is too thin, the precision wire 200 may be broken or broken in the separation process, and when the precision wire 200 is too thin, the precision wire 200 may separate the separation objects in the separation process. It can be greatly damaged.

In addition, this conventional method only physically separates the two units, and does not effectively remove the adhesive that binds the two units, there is a need to perform the cleaning of the separated portion is essential.

The present invention is to solve the above problems, the separation of the touch sensing unit for the reproduction of the touch sensing unit does not significantly damage the quality of the product after the separation operation while performing the separation operation of the touch sensing unit and the liquid crystal display unit smoothly. And a cleaning method.

According to one embodiment of the present invention for achieving the above object, in the liquid crystal display unit equipped with a touch sensing unit, as a method of separating the touch sensing unit or a touch sensing unit or a partial layer of the touch sensing unit for the reproduction of the touch sensing unit or the liquid crystal display unit. A first step of forming a gap between the separation object and the non-separation object; And a touch sensing unit separation and cleaning method for regenerating the touch sensing unit including a second step of spraying cooling gas into the gap.

Preferably, in order to remove adhesive or foreign matter remaining on one surface of the separation object or the non-separation object, it is preferable to further perform a third step of spraying and cleaning the fine powder on the one surface.

More preferably, the fine powder is a CO 2 fillet.

More preferably, the cooling gas is CO 2 snow.

More preferably, the method of spraying the cooling gas is made through an injection nozzle having a first injection hole and a first injection hole through which different heterogeneous fluids can be injected, and CO 2 snow is injected into the first injection hole. It is preferable that relatively high temperature N 2 gas is injected into the second injection hole.

In addition, the injection nozzle may include a first member having a straight first flow path for injecting fluid and a first inclined surface having a truncated cone shape; And a second member coupled to an outer side of the first body and having a second inclined surface in inner surface contact with the first inclined surface, wherein the first inclined surface or the second inclined surface has a spiral or curved second shape; It is preferable that the flow path is formed to join the fluid injected from the flow path to form a flow of the fluid injected in the vortex form.

The present invention can quickly and accurately separate the touch sensing unit or some layers of the touch sensing unit from the liquid crystal display unit equipped with the touch sensing unit, thereby improving the regeneration efficiency of the touch sensing unit.

In addition, the present invention by performing the separation operation by spraying the gas powder (specifically CO 2 snow) of the fine powder form to the separation target and the non-separation target, foreign matter such as adhesive on the adhesive surface of the separation target and the non-separation target Since this is generally removed cleanly, it is possible to improve the regeneration quality of the separation object and non-separation object.

In addition, the present invention can simplify the separation operation between the separation object and the non-separation object, it is possible to shorten the working time (or regeneration time), and unlike the prior art, it is possible to significantly lower the defective rate of the separated remanufactured product.

In addition, the present invention does not use a separate cleaning agent (for example, solvent), unlike the prior art by using a gas that can be easily obtained in the air to perform the separation and cleaning (that is, removing contaminants), it is required for the production of remanufactured Costs and emissions of pollutants can be lowered.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, terms that refer to the components of the present invention are named in consideration of the function of each component, it should not be understood as a meaning limiting the technical components of the present invention.

4 is a flowchart illustrating a method of detaching a touch sensing unit for reproducing the touch sensing unit according to an embodiment of the present invention, and FIG. 5 is a touch sensing unit for reproducing the touch sensing unit according to another embodiment of the present invention. Is a flowchart showing the separation method of. For reference, reference numerals of the touch sensing unit 130 and the liquid crystal display unit 120 use the same reference numerals used in the prior art description of FIG. 1.

(Embodiment 1)

The method of detaching the touch sensing unit according to the exemplary embodiment of the present invention includes two steps, as shown in FIGS. 4A to 4C.

The first step is to fix the device in which the touch sensing unit 130 and the liquid crystal display unit 120 are integrated in a dedicated jig, and then between the touch sensing unit 130 and the liquid crystal display unit 120 or the touch sensing unit 130. Place a wedge-shaped tool or other type of tool at the bottom of the layer to be separated, and a portion of the touch sensing unit 130 (preferably a corner portion) so that a gap is formed between these units 120 and 130. ) Is upwardly lifted (see FIGS. 4A and 4B). For reference, a conventional precision wire may be used as a tool for performing this step.

In the second step, a cooling gas (preferably CO 2 snow) is sprayed through the nozzle 40 in the gap created in the first step, and the object to be separated (ie, the touch sensing unit 130 or the touch). Some layers of the sensing unit 130) are blown off (see FIG. 4C).

Here, since the cooling gas freezes and destroys the adhesive existing between the touch sensing unit 130 and the liquid crystal display unit 120, the coupling force between the touch sensing unit 130 and the liquid crystal display unit 120 can be significantly lowered. have.

Therefore, when the cooling gas is sprayed at high speed and high pressure through the nozzle 40, the touch sensing unit 130 or a part of the layer is easily separated from the liquid crystal display unit 120 and separated.

In addition, the present invention, unlike the conventional method of using a precision wire having a higher physical strength than the separation object, because the use of a cooling gas having a very low physical strength than the separation object, does not damage the surface of the separation object, the separation operation is a physical strength And there is no fear of diffusion and expansion of properties to other units or layers.

On the other hand, the cooling gas may be a CO 2 snow or a CO 2 fillet having crystal grains of sub-micron units, the CO 2 snow is a pressure of about 80 PSI CO 2 gas under the pressure conditions (800 PSI) of the gas phase and liquid phase It can be obtained by lowering, and the CO 2 fillet can be obtained by compressing the CO 2 snow obtained in advance and collecting them in the form of a certain shape.

When using such a CO 2 snow and CO 2 fillet, the crystal particles contained in the gas does not damage the surface of the separation unit (120, 130), but adheres to the surface of the separation unit (120, 130) Since the adhesive is also removed, a better separation object can be obtained.

(Second Embodiment)

The second embodiment according to the present invention has a difference in that in the method according to the first embodiment, the third step is further performed to obtain a better quality separation object (for reference, FIGS. 5 to 5 ( Steps a) to (c) are the same as in the first embodiment, and detailed description thereof will be omitted).

That is, in the separation method according to the second exemplary embodiment, after the touch sensing unit 130 is removed from the liquid crystal display unit 120 as shown in FIG. 5, the liquid crystal display unit 120 or the touch sensing unit 130 is removed. The step of removing the adhesive residue or other foreign matter remaining on the surface by spraying the same cooling gas or other cleaning liquid as the second step through a nozzle (may be a nozzle different from the second step).

Since the present embodiment is further performed to clean the surface of the separation object, the touch sensing unit 130 or the liquid crystal display unit 120 having substantially the same quality as a new product can be obtained.

However, according to the present invention, since the touch sensing unit 130 or the liquid crystal display unit 120 that can be reproduced can be obtained only by the processing method described in the first embodiment, the steps shown in FIG. You don't have to.

(Nozzle Structure of Cooling Gas)

FIG. 6 illustrates one form of the nozzle used in the cooling gas spraying process of FIGS. 4 and 5, and FIG. 7 illustrates another form of the nozzle used in the cooling gas spraying process of FIGS. 4 and 5.

On the other hand, while the nozzle 40 has been described as spraying a single type of gas (CO 2 snow), even if a different type of gas or a single type of gas having a different characteristic of the nozzle 40 shown in Figures 6 and 7 By spraying through), it is possible to maximize the effect of the present invention.

The nozzle 40 according to one aspect for further maximizing the separation method of the present invention comprises at least two members 42 and 44 to form two flow paths 424 and 46 as shown in FIG. 6.

That is, the nozzle 40 according to one embodiment injects a cooling gas (preferably CO 2 snow) through the first flow passage 424, and a relatively hot gas (preferably through the second flow passage 46). May inject N 2 ) or other characteristic gas or material (eg, a gas that can maximize the effect of separation of the units 120, 130 or removal of the adhesive).

The nozzle 40 according to another embodiment includes a first member 42 and a second member 44 as shown in FIG. 7. The first member 42 generally consists of a truncated cone-shaped front portion and a cylindrical rear portion, and has a first inclined surface 422, a first flow passage 424, and a second flow passage 46. The first inclined surface 422 is formed in the front portion of the truncated cone shape, the first passage 424 is formed long along the longitudinal direction of the first member 42 in the center of the first member (42). The second passage 46 is formed in a curved shape on the first inclined surface 422 as shown in FIG. 5. On the other hand, in the present embodiment, the maximum diameter of the front portion of the first member 42 so that fluid or gas flowing along the circumference of the rear portion of the first member 42 can flow into the second flow passage 46. D1) is formed larger than the diameter D2 of the rear portion of the first member 42.

The second member 44 has a space for accommodating the first member 42 therein, and is formed to surround a portion other than the front and rear surfaces of the first member 42. The second member 44 has a second inclined surface 442 in contact with the first inclined surface 422 of the first member 42 inside the front portion. The second inclined surface 442 has the same inclination angle as the first inclined surface 422 of the first member 42 and is completely in contact with the first inclined surface 422 so that the outside of the second flow passage 46 can be sealed. .

On the other hand, the first member 42 and the second member 44 is coupled by a method well known in the art to which the present invention belongs, such as interference fit method, screwing. Therefore, a detailed description of the coupling method and the configuration between these members is omitted.

Next, the spraying effect of the cooling gas by the nozzle 40 made as described above will be described.

As shown in FIG. 4B, when heterogeneous gas (preferably, CO 2 snow and relatively high temperature N 2 ) is supplied to the nozzle 40, each gas is formed in the first flow path 424 and the first gas. It is injected through two passages 46. For example, CO 2 snow (hereinafter referred to as the first gas) is injected through the first flow passage 424 and hot N 2 (hereinafter referred to as the second gas) is injected through the second flow passage 46. (Or vice versa). Here, the first gas injected through the straight first flow passage 424 is injected as it is, but in a curved form (particularly, a curve connecting the minimum diameter D3 to the maximum diameter D1 of the first member 42). The second gas injected through the second flow passage 46 of the shape) is injected in the vortex form by the inertia moving the curved flow passage. That is, the second gas injected through the second flow passage 46 forms an independent vortex centering on the first gas injected through the first flow passage 424 or forms a vortex with the first gas to inject it. (For reference, whether or not the flow may vary depending on the inclined surface 422, and the degree of vortex formation of the second gas centered on the first gas is determined by the number of second flow passages 46 formed on the first inclined surface 422.) By changing).

The cooling gas injection nozzle 40 is sprayed in such a way that the second gas surrounds the first gas, and thus the first gas is not scattered to the surroundings during the injection, and does not bounce large when the injected gas is sprayed on the surface of the object. In addition, since the injection nozzle 40 is a mixture of high temperature N 2 and CO 2 snow is injected appropriately, it is possible to significantly reduce the wear and condensation of the object due to the grains of the CO 2 snow.

On the other hand, while the touch sensing unit and the liquid crystal display unit is separated and washed to explain any one of these members to reproduce, but in some cases the present invention to regenerate the tempered glass attached to the touch sensing unit or the liquid crystal display unit It is apparent to those skilled in the art that the method may be used.

The present invention is not limited only to the embodiments described above, and those of ordinary skill in the art to which the present invention pertains can be made without departing from the spirit of the technical idea of the present invention described in the claims below. Various changes can be made.

1 is a cross-sectional view showing a cross section of a general liquid crystal display unit equipped with a touch sensing unit,

Figure 2 is a schematic diagram showing a conventional touch sensing unit separation method,

3 is a diagram illustrating a problem according to the conventional separation method shown in FIG.

4 is a flowchart illustrating a method of detaching a touch sensing unit for reproducing the touch sensing unit according to an embodiment of the present invention.

5 is a flowchart illustrating a method of separating and cleaning the touch sensing unit for reproducing the touch sensing unit according to another embodiment of the present invention.

FIG. 6 illustrates one type of nozzle used in the cooling gas injection process of FIGS. 4 and 5.

FIG. 7 illustrates another embodiment of a nozzle used in the cooling gas injection process of FIGS. 4 and 5.

Description of the Related Art

120: liquid crystal display unit 130: touch detection unit

200: wire 40: nozzle

Claims (6)

In the liquid crystal display unit equipped with a touch sensing unit, a method of separating a touch sensing unit or a part of a touch sensing unit for reproducing the touch sensing unit or the liquid crystal display unit, Forming a gap between the separation object and the non-separation object; And And a touch sensing unit for regenerating the touch sensing unit including a second step of spraying cooling gas into the gap. The method according to claim 1, In order to remove the adhesive or foreign matter remaining on one surface of the separation object or the non-separation object, a third step of spraying fine powder on the one surface for cleaning is further performed. How to remove and clean the touch sensing unit. The method according to claim 2, The fine powder is a touch sensing unit for cleaning and removing the touch sensing unit, characterized in that the CO 2 fillet. The method according to any one of claims 1 to 3, And the cooling gas is CO 2 snow. The method of separating and cleaning a touch sensing unit for regeneration of a touch sensing unit. The method according to claim 4, The injection method of the cooling gas is made through an injection nozzle having a first injection hole and a first injection hole that can be injected different types of fluid, CO 2 snow is injected into the first injection hole, a relatively high temperature N 2 gas is injected into the second injection hole, the touch sensing unit separation and cleaning method for regeneration of the touch sensing unit. The method according to claim 5, The injection nozzle comprises: a first member having a first straight path for injecting fluid and a first inclined surface in the form of a truncated cone; And a second member coupled to the outside of the first body and having a second inclined surface in surface contact with the first inclined surface. Touch sensing unit, characterized in that the first inclined surface or the second inclined surface is formed with a spiral or curved second flow path is formed to join the fluid injected from the flow path to form a flow of fluid injected in the vortex form Method of separating and cleaning the touch sensing unit for the regeneration of.
KR1020090034149A 2009-04-20 2009-04-20 Touch window rework and cleansing method KR20100115529A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101459638B1 (en) * 2013-01-14 2014-11-20 김선기 Method for regenerating a panel of touch screen
CN104299516A (en) * 2013-07-19 2015-01-21 三星显示有限公司 Reworking apparatus for display module and reworking method for display module using the same
KR20190084190A (en) * 2018-01-05 2019-07-16 삼성디스플레이 주식회사 Apparatus for separating window and method for separating window using the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101459638B1 (en) * 2013-01-14 2014-11-20 김선기 Method for regenerating a panel of touch screen
CN104299516A (en) * 2013-07-19 2015-01-21 三星显示有限公司 Reworking apparatus for display module and reworking method for display module using the same
KR20150010486A (en) * 2013-07-19 2015-01-28 삼성디스플레이 주식회사 Reworking apparatus for display module and the reworking method using the same
US9316850B2 (en) 2013-07-19 2016-04-19 Samsung Display Co., Ltd. Reworking apparatus for display module and reworking method for display module using the same
KR20190084190A (en) * 2018-01-05 2019-07-16 삼성디스플레이 주식회사 Apparatus for separating window and method for separating window using the same
US11458721B2 (en) 2018-01-05 2022-10-04 Samsung Display Co., Ltd. Apparatus for separating a window and method for separating a window using the same

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