KR101269666B1 - Back sheet and luminescence apparatus using the same - Google Patents

Abstract

PURPOSE: A back sheet for a light emitting device and the light emitting device using the same are provided to improve productivity conspicuously. CONSTITUTION: A back sheet for a light emitting device includes a base film(10) and a light guide patterns(L1,L2). The light guide patterns are separately and repetitively formed on the surface of the base film. Each pattern has adhesive property by being formed by printing a light emitting ink mixed with an adhesive agent. Each pattern includes a plurality of pattern elements constituting an edge part and a side part(21b). The edge part of the pattern element is located at each edge of a square pattern contour, and is positioned so that one vertex of a triangle corresponds to the vertex of the edge part. Four side part of the pattern element are comprised in the square pattern contour.

Description

BACK SHEET AND LUMINESCENCE APPARATUS USING THE SAME}

The present invention relates to a light emitting device back sheet and a light emitting device using the same.

More specifically, light guide patterns are formed on the surface of the base film, in particular, the reflective film, and are repeatedly spaced apart. The patterns are formed by printing a light-emitting ink mixed with a pressure-sensitive adhesive. In particular, when attaching to a display panel (signboard, guide plate, etc.) or a light emitting panel constituting a surface lighting device, simply pressurize and attach, thereby greatly improving productivity.

Even when repeatedly detached and detached, the adhesiveness is maintained and the pattern of the backsheet attached to the light transmitting panel is not buried, thereby improving workability and quality.

Furthermore, the light guide performance is maintained even when the back sheet and the back sheet are connected to each other, and the back sheet for the light emitting device capable of producing both a dot type light guide pattern to be matched with the direction of the light source irradiator and a lattice type light guide pattern independent of the direction of the light source irradiator, and It relates to a light emitting device using the same.

In general, the back sheet of the display device is generally laminated with various laminated films or composite films such as a reflective film, a light guide film, a diffusion film, and a prism sheet.

The double light guide film or the light guide panel is a member that provides a path for uniformly scattering and diffusing the light emitted from the light source, and is a surface light source device used for a light receiving type flat panel display device such as a liquid crystal display device or an illumination signboard. Is being applied to.

In the surface light source device, at least one light source is installed on the sidewall of the light guide plate to guide light and diffuse the light, or to form a meandering discharge space in a container having an enclosed space, and at both ends of the discharge space. Each of the electrodes is provided at a position to excite the phosphor layer formed in the discharge space by these discharges.

Such surface light source devices are disclosed in Korean Patent Application Nos. 93-11174, 94-26117, 94-33115, 94-26116, 2000-44725, and the like.

Conventional surface light source device A light guide plate typically includes a light guide plate, a reflecting plate provided below the light guide plate, and a light source provided on a sidewall of the light guide plate.

The light guide plate has a plurality of light guide patterns printed using bead-shaped titanium oxide (TiO 2) and ink including glass or acrylic, in order to scatter and diffuse light incident on one surface of the transparent acrylic resin. . The light guide pattern portion formed by the conventional printing method has been pointed out that the manufacturing and printing process of the ink is very complicated, a high defect rate such as some of the printed portions are dropped or stained, and the yield is low.

However, with the improvement of adhesives and inks, products such as televisions and computer monitors that do not require high-quality and high-quality displays such as billboards and signboards, and other products that focus on characteristics such as brightness such as home or office surface lighting devices In this case, it is possible to fully satisfy productivity, commercial viability and quality satisfaction.

The technology related to the back sheet, especially the light guide sheet, which is related to the use of the signboard or the lighting device,

Utility Model Registration No. 20-0453058 (Registration date March 29, 2011) There is a [reflective sheet with light induction pattern],

The registration proposal proposes a half-shii sheet with a light induction pattern which can reduce the manufacturing cost of the backlight unit and improve luminance and illuminance uniformity by forming a pattern for inducing and inducing a light source in the reflective sheet. have.

Also, Patent Registration No. 10-1144894 (Registration Date May 03, 2012) Attached light guide plate manufacturing system] is presented.

The registered patent proposes a method of manufacturing a light guide plate by manufacturing a reflective sheet having a light induction pattern, and attaching the reflective sheet to a synthetic resin plate including acrylic, and a manufacturing system capable of performing the method.

However, the products based on the two conventional technologies require high skill of the operator because the pattern of the back sheet attached to the transparent panel is buried when the back sheet (particularly the light guide sheet) is repeatedly attached to the transparent panel such as a window. Improvements have been continually called for causing major complaints.

Accordingly, the present invention is formed with light guide patterns that are repeatedly spaced apart on the surface of the base film, especially the reflective film, and these patterns are formed by printing a light-emitting ink mixed with a pressure-sensitive adhesive, and are manufactured with adhesiveness. It is an object of the present invention to provide a back sheet for a light emitting device and a light emitting device using the same, which can be significantly improved in productivity when attached to a light emitting panel (signboard, guide plate, etc.) or a light emitting panel constituting a surface lighting device. .

In addition, the present invention improves the workability and quality because the adhesiveness is maintained even when repeatedly detached by repeatedly improving the light emitting ink mixed with the adhesive for printing the light guide pattern, and the pattern of the back sheet attached to the transparent panel is not buried. It is an object of the present invention to provide a backsheet that can be significantly increased.

Furthermore, the present invention maintains light guiding performance even when the back sheet is connected to the back sheet, and is capable of producing both a dot type light guide pattern and a lattice type light guide pattern irrelevant to the direction of the light source irradiator, depending on the direction of the light source irradiator. An object of the present invention is to provide a back sheet for light and a light emitting device using the same.

In order to achieve the above object, the light emitting device backsheet according to the present invention is

A base film; And

Light guide patterns repeatedly formed on the surface of the base film;

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Each of the patterns is formed by printing a light-emitting ink mixed with a pressure-sensitive adhesive is characterized in that the adhesive.

In the backsheet for a light emitting device according to the present invention

The patterns are characterized in that the density increases away from the light source irradiator,

Each pattern is composed of a plurality of pattern elements concentrated in a rectangular pattern contour, the rectangular pattern contour is arranged in an inclined form with respect to the light source, each pattern element is composed of a corner portion and a side portion do.

Furthermore, the light emitting device according to the present invention

A back sheet comprising a base film and light guide patterns repeatedly spaced apart from the base film surface;

A light transmitting panel attached to a surface of the back sheet;

A light source provided in part or all of side surfaces of the light transmission panel;

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Each pattern of the back sheet is formed by printing a light-emitting ink mixed with a pressure-sensitive adhesive is characterized in that the adhesive.

In the light emitting device backsheet and the light emitting device using the same, light guide patterns formed on the surface of the base film, in particular, the reflective film, are repeatedly spaced apart, and the patterns are formed by printing a light emitting ink mixed with an adhesive. When the backsheet manufactured with adhesiveness is attached to a light emitting device, in particular a display (signage, a guide plate, etc.) or a light emitting panel constituting a surface lighting device, simply pressurizing and attaching the backsheet can significantly improve productivity, and also light guide. Even when repeatedly detached by improving the light emitting ink mixed with the adhesive for printing the pattern, the adhesiveness is maintained and the pattern of the back sheet attached to the transparent panel is not buried, thereby improving workability and quality. Furthermore, even when the backsheet and the backsheet are joined together, the light guide performance is maintained as it is, Both to the grid-shaped light guide pattern independent of the orientation of the dot-like pattern or the light guide light source chwoya check block may produce a service available, dramatically technology.

1 is an exploded perspective view of a light emitting device according to the present invention;
2 is a diagram related to the main pattern of the backsheet according to the present invention;
Figure 3 is an edited picture of a light emitting device and a bonding device using a back sheet according to the present invention.
Figure 4 is a slider and a position adjusting unit coupled to the fixing bracket of the light emitting device according to the present invention.

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

The present invention may be modified in various ways and may have various forms, and thus embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In addition, in the drawings, the components are exaggerated in size (or thickness), in size (or thickness), in size (or thickness), or in a simplified form or simplified in view of convenience of understanding. It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

The terms 'sheet', 'film', 'panel', etc. in relation to the light emitting device backsheet (B) and the light emitting device (A) using the same mean the thickness, size, physical properties (rigidity, flexibility, etc.). The present invention should not be construed as limited by its designation by any reference irrelevant to such.

However, the back sheet or the light guide sheet refers to a base film or a reflective film including a light guide pattern formed on the surface thereof.

In addition, letters, numbers, and various symbols constituting the information unit 51 of the display sheet 50 arranged in the light emitting panel constituting the light emitting device A using the light emitting device backsheet B according to the present invention are country-specific. It means any labeling system for information, information, warnings, etc. that encompasses new or promised terms, as well as those used or used by ages.

Hereinafter, the light emitting device A described in the present invention will mainly be described mainly on a signboard such as an advertisement board or a guide board, but the technology of the present invention can be utilized for home or office surface lighting devices, decorative lighting devices, small uses, and the like. These various applications should be construed as falling within the protection scope of the present invention.

First, as can be seen in the drawing of the light emitting device A of FIG. 1 and the related light guide pattern 20 of the backsheet B of FIG. 2,

The backsheet of the present invention is composed of a base film 10 and light guide patterns 20 repeatedly spaced apart from the base film surface.

In the metering type light emitting device, the base film is particularly preferably a reflective film. The reflective film effectively reflects the light irradiated from the light source to the light guide sheet 10 (reflective performance is determined by the reflectance of the mirror reflection), and also serves as a back protective film of the light emitting device, and furthermore, the light guide sheet 10 A known reflection that reflects the diffused light leaked from the back into the light guiding sheet and changes its direction in the direction perpendicular to the plate in the vertical direction to the light guiding sheet moving in parallel through the light guiding sheet. Film can be employed.

The base film or the reflective film may have a flexible property for workability, and may be made of, for example, polyethylene terephthalate (PET) or polycarbonate (PC).

Each pattern is formed by printing a light-emitting ink mixed with a pressure-sensitive adhesive,

Due to the adhesive, the patterning side of the base film has adhesiveness,

When attaching to the light emitting panel 30 for manufacturing the light emitting device (A) in a state that the back sheet (B) is laminated on the light transmitting panel 30

It is rotated by a motor and can be easily attached by passing through the bonding apparatus P having the crimping drum P1 arranged on the table P2.

The light emitting component of the light emitting ink composition for the light guide pattern may be formed of a conventional light guide sheet, for example, through ceramic particles such as titanium oxide or glass. Related technical documents include Patent Publication No. 10-2012-0049688 (published May 17, 2012) [Light Diffusion Ink Composition and Light Guide Panel Using the Same].

In addition, it may be made of acrylic (acrylic) or silicone (silicone) having the pressure-sensitive adhesive component, and may be applied to any one selected from other urethane-based, poly-synthetic resin, urethane vinyl-based synthetic resin, etc., printed in liquid or paste form gel It has a property that can be cured in the form of (gel), and it is preferable to have adhesiveness repeatedly as in the known 'Post it' ™ (post-it). It is desirable that the stability of the state is ensured.

It is preferable that the back sheet B can be produced and sold separately by attaching a release paper to the light guide pattern formation surface.

In addition, the method of printing a pattern with a light emitting ink on the base film 10, especially a reflective film, is a utility model registration No. 20-0451991 (registration date January 18, 2011) [reflective sheet manufacturing apparatus with a light induction pattern] As shown in FIG. 1, a roll type printing technique may be utilized. More preferably, the screen printing technique may be applied to secure the precision of the pattern.

As illustrated in FIG. 1, the light guide patterns of the manufactured backsheet B may be lattice (L1, L2) or dot (D1, D2, D3).

It is preferable that the patterns increase in density as they move away from the light source irradiator 40s so that the light of the light source exhibits uniform luminance over the entire light emitting device.

Particularly, such a characteristic is more preferable in the case of a dot light guide pattern, and it is preferable that the density increases from the low density part Dl to the high density part Dh.

In the first dot type D1, the number of pattern elements per unit area is gradually increased.

In the second and third dot shapes D2 and D3, a method of gradually increasing the individual size of each pattern element is adopted.

The first and third dot shapes D1 and D3 have a form in which the low density portion Dl is positioned at one end (the light source irradiating portion 40s side) and the high density portion Dh is disposed at the other end.

In the second dot type D2, the low density portion Dl is positioned at both ends (the light source irradiating portion 40s is provided at both ends), and the high density portion Dh is located at the center.

On the other hand, as shown in FIGS. 2 and 1, the lattice light guide patterns L1 and L2 are formed of a plurality of pattern elements each of which is densely arranged in the rectangular pattern outline 20L. In addition, each pattern element of the two lattice light guide patterns L1 and L2 has a triangle or a similar triangle (rounded corners).

The first grid-shaped light guiding pattern L1 has a pattern element having a shape in which the corner portion 21a and the side portion 21b are separated from each other, and the corner portion 21a has a rectangular pattern outline ( It is preferable that each vertex of 20L) is positioned so that one vertex of the triangle corresponds to the vertex of the corner portion 21a.

In addition, the first grid-shaped light guide pattern L1 has two pattern elements gathered together to form one side portion 21b, and the side portion 21b does not touch the bottom sides of each pattern element. It consists of the shape of rhombuses gathered in parallel. A plurality of side portions 21b formed in the shape of the rhombus are provided in the rectangular pattern outline 20L. The side portion 21b may be formed in a square shape according to the length of each side of the pattern element.

Four side portions 21b are provided in the rectangular pattern outline 20L, and each side portion 21b has a 12 o'clock and 6 o'clock (vertical direction) and a 3 o'clock position as a clockwise reference. The side portions 21b in the 9 o'clock direction (horizontal direction) each have the same shape.

That is, the two side portions 21b placed in the horizontal direction have the same shape, and the two side portions 21b placed in the longitudinal direction have the same shape, but the shape in the horizontal direction and the longitudinal direction are formed differently. .

Unlike the first grid-shaped light guide pattern L1, the second grid-shaped light guide pattern L2 partially covers the corner portion 23a in one pattern element, and the other portion has a side portion ( 23b).

Such lattice light guide patterns L1 and L2 are shown in the photograph attached to FIG. Although the density of the elements is uniform throughout without increasing or decreasing, the luminance is uniform and high quality is exhibited throughout the light emitting device A.

Furthermore, it has been found that the backsheet B having the rectangular pattern outline 20L is arranged in an inclined form with respect to the light source 41 and has a higher luminance quality.

That is, the angle θ at which the position of the light source irradiator 40s and the lattice light guide patterns L1 and L2 are arranged is 20 to 80 degrees, preferably 30 to 70 degrees.

Meanwhile, as shown in the photograph attached to FIG. 3B, the light guide performance is maintained even when the backsheet and the backsheet are connected to each other.

As shown in the photograph (FIG. 3B) of the first dot type D1 light guiding pattern (FIG. 3B), not only the light emitting device A employing the backsheet provided therewith,

The same applies to the lattice light guide patterns L1 and L2, but it is preferable that the lattice light guide patterns match and match each other at the junction portion Bb.

Next, the light emitting device A according to the present invention uses the back sheet B, and the base film 10 constituting the back sheet, in particular the reflective film, also serves as a protective film. 10, the transparent acrylic panel suitable for the light-transmitting panel 30, in particular for the sign light emitting device (A) is placed on the upper surface of the light guide pattern 20,

As mentioned above, after bonding the backsheet B and the light-transmitting panel 30 through the bonding apparatus P having the crimping drum P1 (refer to the photograph of FIG. 3C),

As shown in FIG. 1, in order to stack and arrange a display sheet 50 (display unit) such as an optometry table on the light-transmitting panel 30, and to implement a light-emitting irradiation, the side of the light-emitting panel 30 (a rectangular light-transmitting panel) The light source member 40 is introduced into one side or the opposite side of the light source.

Since the light source member 40 can implement a thin signboard due to the LED light source 41, the cross-sectional shape is formed so that the light source mounting member and the side surfaces of the stacked [backsheet-transmission panel-display sheet assembly] can be combined and bound. Hangul consonants can be configured by using a fixed bracket 43 of the '' 'shape.

The display sheet 40 includes an information part 51 printed black to cover light, and a light transmitting part 53 corresponding to a part outside the information part.

Meanwhile, as shown in FIG. 4, a slider 60 capable of sliding engagement and separation with the bracket 43 and a position adjusting unit connected to the slider 60 to adjust the movement of the LED light source 41 ( 70) can be configured.

The slider 60 may be provided with a rod 61 so that the pair of rods may be parallel to the lower end of the slider 60 so that the position adjusting unit 70 can move freely on the rod 61. By using the slider 60, the user can easily replace the LED light source 41 during the use of the light emitting device (S) can increase the ease of use.

The position adjusting unit 70 is composed of a light source support plate 71, a rod holder 72, a tightening bolt (73). The light source support plate 71 is coupled to the rod holder 72, and the tightening bolt 73 is coupled to the lower end of the light source support plate 71 so that when the tightening bolt 73 is turned, the rod 61 contacts the rod 61. The position adjusting unit 70 may be fixed or separated from the rod 61 to move the fixed position adjusting unit 70.

The rod 61 is preferably a groove (not shown) is formed at regular intervals to be coupled to the tightening bolt (73).

The light source support plate 71 may be configured as a square plate to be coupled to the LED light source 41 to move stably. The four corner portions of the light source support plate 71 are preferably provided with four fastening bolts 73 so as to be more securely and firmly fixed. In addition, the tightening bolt 73 may be tightened by hand, and the head is preferably formed with (+) or (-) so as to be tightened with a crosshead (+) or a minus (-) screwdriver.

The rod holder 72 has a hole shape open to prevent movement of the rod 61 and is configured to surround the rod 61 so that the light source support plate 71 does not shake or is separated from the slider 60. do.

The use of the position adjusting unit 70 can prevent the unnecessary use of the LDE light source 41, the user can adjust the number of uses of the LDE light source 41, unnecessary waste and efficient arrangement of the LDE light source 41 It can represent the optimal brightness with.

In the above description, conventionally known technologies related to the light guide film, the back sheet, the light emitting ink, the pressure-sensitive adhesive, the light source (LED), and the like are omitted, but those skilled in the art can easily infer, infer, and reproduce them.

In addition, in the above description of the present invention, the backsheet (B) and the light emitting device (A) having a specific configuration, shape, and structure have been described with reference to the accompanying drawings. It is possible that such modifications, changes and substitutions should be interpreted as falling within the protection scope of the present invention.

A: Light emitting device B: Backsheet
L1, L2: Light guide pattern Dh: High density part
Dℓ: low density part 10: base film
20: Light guide pattern 20L: Pattern outline
23a: corner portion 23b: edge portion
30: light transmission panel 40: light source member
40s: light source irradiator 41: LED light source
43: fixing bracket 50: display unit (display sheet)
51: information part 53: glossy light transmitting part
60: slider 61: loading
70: position adjusting portion 71: light source support plate
72: road holder 73: tightening bolt

Claims (4)

A base film; And
Light guide patterns repeatedly formed on the surface of the base film;
Including but not limited to,

Each of the patterns is formed by printing a light-emitting ink mixed with a pressure-sensitive adhesive, has adhesiveness,

Each of the patterns L1 and L2 includes a plurality of dense pattern elements forming the corner portion 21a and the edge portion 21b .

The corner portion 21a of the pattern element is located at each corner of the square pattern contour, and any one vertex of the triangle corresponds to the vertex of the corner portion 21a,

Four sides 21b of the pattern element are provided in the rectangular pattern outline 20L, and each side portion 21b has the same shape as the 12 o'clock and 6 o'clock directions and the 3 o'clock and 9 o'clock directions, respectively, on a clockwise basis. Backsheet for light emitting device, characterized in that. The method of claim 1,
The edge portion 21b of the pattern element is configured in the shape of a rhombus gathered in parallel so as not to touch the bottom side of each pattern element,
The back sheet for a light emitting device, characterized in that the shape of the transverse direction and the longitudinal direction are formed differently . The method of claim 1,
The side portion (21b) of the pattern element is a back sheet for a light emitting device , characterized in that the shape of the square according to the side length of each pattern element . A back sheet composed of a base film and light guide patterns repeatedly spaced apart from the surface of the base film;
A light transmitting panel attached to a surface of the back sheet;
A light source member provided on some or all of side surfaces of the light transmission panel;
Including but not limited to,

Each pattern of the back sheet is formed by printing a light-emitting ink mixed with an adhesive is adhesive,
Each of the patterns L1 and L2 includes a plurality of dense pattern elements forming the corner portion 21a and the edge portion 21b .

The corner portion 21a of the pattern element is located at each corner of the square pattern contour, and any one vertex of the triangle corresponds to the vertex of the corner portion 21a,

Four sides 21b of the pattern element are provided in the rectangular pattern outline 20L, and each side portion 21b has the same shape as the 12 o'clock and 6 o'clock directions and the 3 o'clock and 9 o'clock directions, respectively, on a clockwise basis. Light emitting device, characterized in that.

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