KR101012614B1 - Method for manufacture patterning sheet layer used display device of right under method - Google Patents

Abstract

The present invention relates to a method of manufacturing a patterning sheet layer for a direct type display device, comprising: stacking a diffusion sheet (2) on top of a line light source (11) mounted on a rear surface of a direct type display device; The line pattern area 13 on which lines 12 having different thicknesses are printed in the same direction as the longitudinal direction of the line light source 11 and the non-pattern area 13 ′ on which lines are not printed alternately form a transparent film ( 8) laminating a line pattern sheet (10) arranged on the top of the diffusion sheet (2); Points 22 having different diameters from one another on the other transparent film to absorb light projected onto the non-patterned region 13 ′ without being absorbed by the line pattern sheet 10 have the length of the line light source 11. Stacking the dot pattern region 23 printed in the same direction as the direction and the dot pattern sheet 20 on which the non-pattern regions 23` where the dots are not printed are alternately arranged on the line pattern sheet 10. ; And laminating the liquid crystal panel 5 on the dot pattern sheet 20.

Direct Method, Film, Display Patterning, Luminance

Description

METHODS FOR MANUFACTURE PATTERNING SHEET LAYER USED DISPLAY DEVICE OF RIGHT UNDER METHOD}

The present invention relates to a method for manufacturing a patterning sheet layer for a direct type display device, and more particularly, to arrange a film printed in a dot or line pattern on the front surface of the light source of the direct type display device to A method for producing a patterning sheet layer for a display device of a direct-type method in which the luminance of the display device can be made uniform by absorbing a part thereof.

Typically, a direct display in which the light source is below the sheet has a very bright portion immediately above the position where the light source is mounted, and a portion between the light source and the light source is relatively dark.

In this way, if the brightness of the sheet-like light is not uniform, as a result, the clarity, brightness, etc. of display devices such as TVs and monitors are not uniform, resulting in a significant drop in commodity value.

In order to solve the above problems, the conventional direct light emitting display device is disposed on the rear of the light source 11, the reflector 6 for reflecting the light emitted to the rear of the light source 11 in the front direction, the light source ( 11) to increase the uniformity of light incident to the light guide plate 7 and the liquid crystal panel 5 to be described later to scatter and equalize the light irradiated directly to the front direction and the light reflected to the reflector 6 and irradiated to the front. To protect the one or two prism sheets 3 and the prism sheet 3 to change the propagation path of the light irradiated from the diffusion sheet 2 and to improve the brightness of the light. Uniformity of luminance has been realized by including a protective sheet 4 for display and a liquid crystal panel 5 which displays various types of information by applying a predetermined voltage to change the arrangement of molecules.

However, a plurality of sheets are used in the above-described direct-emitting display apparatus of the related art for uniforming the luminance, and the plurality of sheets are manufactured by different processes, and the sheets manufactured are laminated and assembled in a predetermined order. Therefore, there is a problem that the assembly process is complicated and takes a lot of time.

In addition, the prism sheet for changing the light propagation path and deriving the brightness of the light used in the conventional direct light emitting display device has a problem in that the price competitiveness is low.

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In order to solve the above problems, the present invention comprises the steps of stacking the diffusion sheet on the line light source mounted on the rear of the direct-type display device; A line pattern sheet in which lines having different thicknesses are printed in the same direction as the longitudinal direction of the line light source and a non-pattern region in which lines are not printed are alternately stacked, and a line pattern sheet arranged on a transparent film is laminated on the diffusion sheet. Making; The dot pattern area and the point pattern having different diameters printed on the other transparent film in the same direction as the longitudinal direction of the line light source in order to absorb light projected to the non-pattern area without being absorbed in the line pattern sheet, Stacking a dot pattern sheet having alternating non-printed non-pattern regions arranged on top of the line pattern sheet; And laminating a liquid crystal panel on the dot pattern sheet.

The method for producing a patterning sheet layer for a direct-type display device according to the present invention is simple and complicated by the printing process of printing a pattern of lines or dots on a transparent film or by printing a pattern of dots and lines together. There is an effect that can reduce the time involved in the assembly process of the various sheets.

In addition, the method of manufacturing a patterning sheet layer for a direct-type display device according to the present invention excludes the expensive prism sheet used in the conventional display device, and replaces the patterning sheet that is only printed in a pattern of dots or lines on the film. As a result, it is possible to secure an advantage in price competitiveness.

Hereinafter, with reference to the accompanying drawings, a patterning film for a display device of the direct method is briefly described, and then the printing method will be described in detail.

As shown in FIG. 2 and FIG. 3, the patterning film for a direct display device includes a line pattern sheet 10 and a dot pattern sheet 20.

As shown in FIGS. 2 and 3, the line pattern sheet 10 and the dot pattern sheet 20 may be printed with two patterns of dots and lines, respectively, as shown in FIG. 4. The pattern of dots and lines may be printed together on the film.

The line pattern sheet 10 is alternately arranged with line pattern regions 13 on which lines are printed and non-pattern regions 13 ′ on which lines are not printed.

As shown in FIG. 2, the line pattern area 13 is printed by densely printing a plurality of lines 12 printed with different thicknesses on the transparent film 8 as shown in FIG. 5. (11) is printed in the same direction as the arrangement, and is printed at a 43.2 mm interval close to 45 mm, which is an arrangement interval between the linear light sources 11.

That is, when the line light source 11 is arranged in the horizontal direction, the line pattern area 13 is printed in the horizontal direction, and when the line light source 11 is arranged in the vertical direction, the line pattern area 13 is Printed in portrait orientation.

In this case, the lines 12 printed on the line pattern area 13 are different in thickness from each other, and the intervals between the lines are also printed differently from each other.

Substantially, the center distances between the adjacent lines printed on the line pattern area 13 are the same, and the gaps between the lines differ from each other as the thickness of the line becomes thinner as it spreads to the left and right sides.

In addition, the thickest line is printed in the center of the line pattern area 13, and thinner lines are gradually symmetrically printed in both left and right directions about the thickest line.

The thickest line is printed in the center of the line pattern area 13, and thinner lines are symmetrically printed in both left and right directions about the thickest line. The line pattern area 13 is beneficiated. When placed on the circle 11, the thickest line is located directly above the line light source to absorb the most light, and the thin lines are printed correspondingly because less light is irradiated toward both sides.

In the present invention, the distance between the dot and line pattern sheets 10 and 20 and the line light source 11 is 25 mm to 30 mm, and accordingly, the width of the line pattern region 13 is as mentioned above. 43.2mm.

However, the width of the line pattern region 13 may be changed depending on the brightness of the line light source 11 located at the bottom or the front or the distance between the line pattern sheet 10 and the line light source 11. .

In addition, the widths of the lines in the line pattern region 13 may be performed in various combinations within the range of 20 mm to 0.08 mm depending on the brightness of the line light source 11 or the distance between the line pattern sheet 10 and the line light source 11. can do.

On the other hand, the dot pattern sheet 20 is arranged by alternating dot pattern regions 23 on which dots are printed and non-pattern regions 23` on which dots are not printed at intervals of 40 mm.

As shown in FIG. 3, the dot pattern area 23 is formed by densely printing a plurality of dots 22 printed with different thicknesses on the transparent film 8, and the line light source 11 is disposed in a direction. Are printed in the same direction.

That is, when the line light source 11 is disposed in the horizontal direction, the dot pattern region 23 is printed in the horizontal direction, and when the line light source 11 is disposed in the vertical direction, the dot pattern region 23 is vertical. Is printed in the direction.

At this time, the dots 22 printed on the dot pattern region 23 are different in thickness from each other, and the intervals between the dots are also printed differently from each other.

As described in the line pattern region 13, the center distances between the adjacent dots printed on the dot pattern region 23 are the same, and as the size of the dots becomes smaller as they spread to the left and right sides, the intervals between the dots are mutually different. Widen differently.

In addition, the dot pattern area 23 is printed in the horizontal or vertical direction by arranging the thickest dots in the center, and the thinner dots are gradually thinned in both left and right directions around the printed row. The columns are printed symmetrically.

The row of thickest dots is printed in the center of the dot pattern region 23, and the rows of thinner dots are symmetrically printed in both left and right directions around the row of the thickest dots. When the pattern region 23 is disposed on the line light source 11, the row of the thickest points is located directly above the line light source 11 to absorb the most light, and there is not much light radiated toward both sides. In other words, a row of small dots is printed accordingly.

In addition, the radius of the dot in the dot pattern region 23 is various combinations within the range of 0.2mm to 0.076mm depending on the brightness of the line light source 11 or the distance between the dot pattern sheet 20 and the line light source 11 Can be carried out.

The operation of the above-described line pattern sheet 10 and dot pattern sheet 20 in the display device will be described in detail with reference to FIG. 5.

The line pattern sheet 10 and the dot pattern sheet 20 described above are stacked on the entire surface of the diffusion sheet 2, and the line pattern sheet 10 and the dot pattern sheet 20 are separated from the line light source 11. It absorbs about 30% of the light emitted from the concentrated area of the emitted light so that the uniformed light can reach the liquid crystal panel 5.

That is, the line pattern sheet 10 formed by printing the lines 12 on the transparent film 8 is positioned in front of the diffusion sheet 2 to absorb light passing through the diffusion sheet 2. .

In this case, as described above, the line pattern sheet 10 includes a line pattern region 13 and a non-pattern region 13 ′, and the line pattern sheet 10 is formed on the entire surface of the diffusion sheet 2. When stacked, the line pattern region 13 is positioned on the same vertical line as the line light source 11 to absorb some of the light emitted from the line light source 11 intensively.

More specifically, among the lines of the line pattern region 13, the thickest line located at the center is positioned on the same vertical line as the line light source 11, so that a part of the light emitted from the line light source 11 is provided. Will absorb.

Therefore, as the line pattern sheet 10 is stacked on the front surface of the diffusion sheet 2 and absorbs a part of the light, the uniformity of the light emitted from the line light source 11 is further increased.

Meanwhile, the dot pattern sheet 20 is stacked on the line pattern sheet 10, and the dot pattern regions 23 of the dot pattern sheet 20 are non-pattern regions of the line pattern sheet 10 described above. (13`).

As the dot pattern sheet 20 is stacked on the line pattern sheet 10, the dot pattern region 23 of the dot pattern sheet 20 is not absorbed in the pattern region on the line pattern sheet 10 and is non-absorbed. By absorbing part of the light projected onto the pattern region 13 ′, the uniformity of the light emitted from the line light source 11 is further improved.

The shape of the dot pattern is not limited to a circle, and as shown in FIG. 10, the dot pattern may be implemented in various shapes such as a triangle, a rectangle, and a ring.

Luminance is a physical quantity indicating the brightness of an object viewed by an observer from which direction, that is, how much light is coming toward the observer from the surface of the object. When the observer observes the surface, the observer achieves uniform luminance as the uniform light is projected from the line light source 11 to the liquid crystal panel 5 due to the dot pattern sheet 20 and the line pattern sheet 10. The screen of the liquid crystal panel 5 to be displayed can be observed.

Although the above is described as an embodiment in which the dot pattern sheet 20 is laminated on the line pattern sheet 10, the line pattern sheet 10 may be laminated on the dot pattern sheet 20 without being limited thereto.

In addition, the line pattern region 13 intensively absorbs light which is positioned on the same vertical line as the line light source 11 and is emitted directly from the line light source 11 or is reflected by the reflector 6 and is vertically projected. The dot pattern region 23 on the non-pattern region 13 ′ disposed between the line pattern regions 13 absorbs the remaining light projected to the side, but the linear light source 11 is described above. 2) the dot pattern region 23 absorbs light emitted directly from the line light source 11 or directly reflected from the reflector 6 and projected vertically, An embodiment in which the line pattern regions 13 stacked on the non-pattern regions 23 ′ between them absorb the remaining light projected in the lateral direction is also possible.

When the dot pattern sheet 20 and the line pattern sheet 10 are laminated, the absorbance of light may be improved by stacking the printed surface on the transparent sheet 8 toward the line light source 11.

If the opposite surface of the transparent sheet 8 on which the printing is made is laminated toward the line light source 11, part of the light emitted from the line light source may not be absorbed and may be reflected.

Meanwhile, as described above, the dot pattern sheet 20 and the line pattern sheet 10 in which dots and lines are separately printed on each film may be implemented by separately printing dots and lines on the film. As shown in FIG. 1, the dot-line mixing sheet 30 may be implemented by mixing lines and points.

In other words, the line pattern region 13 and the dot pattern region 23 are alternately printed on one transparent film 8.

Hereinafter, a method of manufacturing the patterning sheet layer for a direct display device described above with reference to FIGS. 6 to 9 will be described in detail.

First, according to the size of the display device, the brightness and arrangement of the line light source 11, the step of designing a point or line pattern that can control the bright line is performed (S10).

That is, the size, number and shape of dots or lines to be printed are determined according to the size of the display device, the brightness and the arrangement state of the line light source 11.

Step (S20) is performed to produce a negative film 48 according to the pattern of the point or line designed in the step (S10), the negative film 48 of the point or line designed on a silk cloth made of 420 mesh (mesh) It is produced by marking the pattern and feeding it with grass or varnish on the silk cloth except for the pattern of dots or lines indicated and drying it in the dryer.

That is, the negative film 48 is a portion printed on the transparent film 8 and does not feed grass or varnish on the silk fabric where the pattern of dots or lines is displayed, and on the silk fabric where the pattern of dots or lines is not displayed. Made by filling holes with grass or varnish.

Performing a step of producing a printing screen according to the size of the negative film 48 produced in the step (S20) (S30).

 When the printing screen is manufactured, the transparent film 8 is mounted on the transparent film feeder 41 of the printer (S40), and is supplied from the transparent film feeder 41 to the printing screen 42 by the adsorber 43. A negative film 48 having a dot or line pattern is mounted on the transparent film 8 to be formed (S50).

When the step (S50) is completed and ink is supplied on the negative film 48 from the ink supply of the printer, the line pattern sheet 10, the dot pattern sheet 20 and the dot and line by pressing the pressing jig 47 The step of producing the mixed dot-line mixed pattern sheet 30 is performed (S60).

The production of the line pattern sheet 10, the dot pattern sheet 20 or the dot-line mixed pattern sheet 30 in the step (S60) will be described in detail.

The negative film 48 of the line pattern is mounted on the transparent film 8 supplied to the printing screen, and the negative film of the line or dot pattern is mounted on the screen 42 for printing in a ink supplier which is mixed and stored at a predetermined ratio. Injecting the ink onto the 48 is performed (S61).

When the ink is input in the step S61, the negative film 48 of the line or dot pattern mounted on the printing screen is pressed with the pressing jig 47, and the paste or varnish of the negative film 48 is fed. A step of allowing the ink to be printed on the transparent film 8 under the negative film 48 through the unsupported portion is performed (S62).

When pressing with the pressing jig 47, the drum 46 positioned below the transparent film 8 supports the force applied by the pressing jig 47, and the drum 46 is the transparent film 8. It can be easily printed on the image.

Then, once printing is made on the transparent film 8 by the printer, the ink of the portion where the dots or lines are formed is drawn onto the transparent film 8, and printing is faint at the next printing.

The first squeegee 44 and the second squeegee 45 are moved to the left and the right, respectively, so that the negative film 48 can be printed on the transparent film 8 at the same density at all times even if the printing is repeated. Spread evenly on the ink.

When the negative film 48 on the transparent film 8 is the negative film 48 of the line pattern in the step (S62), the negative film 48 is compressed by pressing the negative film 48 with the crimping jig 47. The ink passes through a portion of the paste or varnish that is not fed, and the line pattern region 13 is printed on the transparent film 8, and the portion of the negative film 48 passes through the portion where the paste or varnish is fed. Ink is not allowed to pass through to form a non-patterned region 13 ′ on the transparent film 8.

On the other hand, when the negative film 48 on the transparent film (8) in the step (S62) is a negative film 48 of the dot pattern, the negative film 48 by pressing the jig 47, the negative film ( The ink passes through a portion of the paste 48 or the varnish that is not fed, and the dot pattern region 23 is printed on the transparent film 8, and the paste or varnish of the negative film 48 is fed. Non-patterned regions 23 'are formed on the transparent film 8 by preventing the ink from passing therethrough.

In step S62, the transparent film 8, which has been printed in the step, is put into a dryer and dried to produce points or line pattern sheets 10 and 20 (S63).

The dot or line pattern printed on the transparent film 8 should be dried in a dryer. At this time, there are ultraviolet (UV: ULTRAVIOLET) drying methods and far infrared (FIR: FAR INFRARED RAY) drying methods depending on the drying method.

In the ultraviolet light method, the ink on the transparent film is dried at two wavelengths at the left, right, and middle portions, that is, 804 nm 581 nm at the left side, 880 nm 660 nm at the middle, and 778 nm 564 nm ultraviolet rays are printed on the transparent film. Dry the dot or line pattern.

The ultraviolet type dryer moves the transparent film at a speed of 11.6 mm / min so as to move properly.

For reference, the ultraviolet rays irradiated to dry the ink in the ultraviolet ray method should be at least 480nm.

The far-infrared drying method is dried through a three-stage drying chamber, at a temperature of 270 ° C. ± 3 ° C. in the first drying chamber, at a temperature of 270 ° C. ± 3 ° C. in the second drying chamber, and at 185 ° C. ± 3 in the third drying chamber. It is dried at a temperature of ℃.

On the other hand, the pattern of dots and lines are printed on the transparent film by the ink of the fluidity and viscosity of the ink according to the ultraviolet light method and far infrared light method and the particles are different.

By using the ink suitable for the above-described drying method, ink particles are evenly printed in a pattern of dots and lines on the transparent film.

On the other hand, when the dot-line mixed pattern sheet 30 is manufactured, if the negative film of the line pattern is first compressed in the step (S62) to print on the transparent film, the line pattern negative film is replaced with the dot pattern negative film. And pressing to cause the dot pattern region 23 to be printed on the non-pattern region 23 'on the transparent film on which the line pattern region 13 is printed (S62').

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawing.

1 is a diagram illustrating a laminated structure of a conventional display device.

2 is a view showing a line pattern sheet printed by the printing method of the patterning film for a direct-type display device according to the present invention.

 3 is a view showing a dot pattern sheet printed by the printing method of the patterning film for a direct-type display device according to the present invention.

4 is a view showing a dot-line mixed pattern sheet printed by a printing method of a patterning film for display device of direct type according to the present invention.

FIG. 5 is a view showing a display device in which a dot and line pattern sheet printed by a printing method of a patterning film for a direct display device according to the present invention is interposed.

6 to 8 are flowcharts for explaining a printing method of a patterning film for a direct display type display device according to the present invention.

9 is a view showing a printing machine for printing a patterning film for a direct-type display device according to the present invention.

10 is a view illustrating various embodiments of a patterning film for a direct display device according to the present invention.

Claims (7)

Stacking the diffusion sheet 2 on the line light source 11 mounted on the rear surface of the direct-type display device; The line pattern area 13 on which lines 12 having different thicknesses are printed in the same direction as the longitudinal direction of the line light source 11 and the non-pattern area 13 ′ on which lines are not printed alternately form a transparent film ( 8) laminating a line pattern sheet (10) arranged on the top of the diffusion sheet (2); Points 22 having different diameters from one another on the other transparent film to absorb light projected onto the non-patterned region 13 ′ without being absorbed by the line pattern sheet 10 have the length of the line light source 11. Stacking the dot pattern region 23 printed in the same direction as the direction and the dot pattern sheet 20 on which the non-pattern regions 23` where the dots are not printed are alternately arranged on the line pattern sheet 10. ; And And laminating a liquid crystal panel (5) on the dot pattern sheet (20). The method of claim 1, The line pattern sheet 10, (a) The thickest line is printed at the center so as to control the size of the display device and the part of the bright line emitted from the line light source, and the thin lines are gradually symmetrically thinned in both left and right directions with respect to the thickest line. Printing to design a lateral line pattern; (b) preparing each negative film 48 for a line by filling grass and varnish with a portion of the line except for the pattern of the line designed in step (a) on the silk cloth to fill and dry the holes; (c) manufacturing a printing screen in accordance with the size of the negative film 48; And (d) mounting a negative pattern 48 of the line pattern on the transparent film supplied to the printing screen; (e) injecting ink onto the negative film 48 of the line pattern mounted on the printing screen in an ink supply formulated and stored at a predetermined ratio; (f) After the addition of the ink is completed, it is compressed with a pressing jig so that the ink passes through the hole on the silk cloth which is not fed with grass or varnish, so that the line pattern area 13 becomes the transparent film 8. Forming a non-pattern area (13 ') on the transparent film (8) where lines are not printed as the ink does not pass through the portion fed with grass or varnish; And (g) a method of manufacturing a patterning sheet layer for a direct type display device, characterized in that it comprises the step of drying the transparent film (8) printed in the line pattern in a dryer. The method of claim 1, The dot pattern sheet 20, (a) The thickest point is printed at the center to control the size of the display device and the absorption of the bright lines radiated from the line light source, and the thinner points are gradually symmetrically printed in both the left and right directions with respect to the thickest point. Designing a dot pattern in a transverse direction; (b) preparing each negative film 48 for a line by filling grass and varnish with the remaining portions except for the pattern of dots designed in step (a) on a silk cloth to fill and dry the holes; (c) manufacturing a printing screen in accordance with the size of the negative film 48; And (d) mounting a negative pattern 48 of a dot pattern on the transparent film supplied to the printing screen; (e) injecting ink onto the negative film 48 of the line pattern mounted on the printing screen in an ink supply formulated and stored at a predetermined ratio; (f) After the ink has been added, it is compressed with a pressing jig to allow the ink to pass through the hole on the silk cloth where grass or varnish is not fed. Forming a non-pattern area (23 ') on the transparent film (8) where lines are not printed as the ink does not pass through the portion fed with grass or varnish; And (g) a method of manufacturing a patterning sheet layer for a direct-type display device, characterized in that it comprises the step of drying the transparent film (8) printed in the dot pattern in a dryer. Stacking the diffusion sheet 2 on the line light source 11 mounted on the rear surface of the direct-type display device; The line pattern area 13 in which lines 12 having different thicknesses are printed in the same direction as the longitudinal direction of the line light source 11 and the points 22 having different diameters in the longitudinal direction of the line light source 11 Stacking the dot-line mixed pattern sheet 20 arranged on one transparent film 8 alternately with the dot pattern regions 23 printed in the same direction as the upper part of the diffusion sheet 2; And And laminating the liquid crystal panel (5) on the dot pattern sheet (20). The method of claim 4, wherein The dot-line mixed pattern sheet 20 is (a) The thickest dots are printed in a row in the center to control the absorption of the bright lines emitted from the line light source and the size of the display device. To design a pattern of dots in which rows of smaller dots are symmetrically printed or a pattern in which thickest lines are printed in the center and thinner lines are symmetrically printed in both left and right directions about the thickest lines, respectively. step; (b) preparing each negative film 48 for dots or lines by filling a hole with a paste of grass or varnish except for the pattern of dots or lines designed in step (a) on the silk cloth and drying the holes; (c) manufacturing a printing screen in accordance with the size of the negative film 48; (d) mounting a transparent film on a transparent film feeder of a printing press, and mounting a negative film 48 having a dot pattern on the transparent film 8 supplied from the transparent film feeder 41 to the printing screen; (e) injecting ink onto a negative film 48 of a dot pattern mounted on the printing screen 42 in an ink supply blended and stored at a predetermined ratio; (f) After the ink has been added, it is compressed with a pressing jig to allow the ink to pass through the hole on the silk cloth where grass or varnish is not fed. Forming a non-pattern area (23`) on the transparent film (8) where dots are not printed as the ink does not pass through the grass or varnish fed portion; (g) replacing the negative film 48 of the dot pattern with the negative film 48 of the line pattern, and repeating the step (f) to perform the non-patterned area 23` where the dots are not printed in the step (f). A line pattern region 13 is printed on the sheet; And (h) a method of manufacturing a patterning sheet layer for a direct type display device, characterized in that it comprises the step of drying the transparent film (8) printed by mixing the dot pattern and the line pattern in a dryer. delete delete

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