KR102085256B1 - Light unit and Automobile lamp unit using the same - Google Patents

Abstract

The present invention relates to a lighting unit, and in particular, to mount the LED to emit light of different colors in the light source module penetrating the center of the light guide module to implement two lights integrated in one light source lamp. It is done.

Description

Lighting unit and surface light source for vehicle including the same {Light unit and Automobile lamp unit using the same}

The present invention relates to a surface light source applied to the lighting unit and vehicle lighting using the same.

Lighting unit using various light sources used in electronic devices is implemented in a way to increase the light efficiency by using a suitable light source according to the characteristics of each electronic device.

Recently, the lighting unit used in such an electronic device is a backlight unit applied to a flat panel display, an indoor light used in an indoor environment, or a head light, a fog light, a retracted light, a vehicle width light, a number light, a tail light, a braking light, a direction installed in an exterior of a vehicle It can be variously applied to indicator lights, emergency flashing lights, and interior lightings installed inside a vehicle.

However, most of such lighting is a method of approaching in terms of the brightness of the surface light source by applying a member such as a light guide plate to streamline the transmission of light for providing light.

For example, FIG. 1 briefly illustrates a structure of a lighting apparatus used in a conventional vehicle.

As shown in FIG. 1, the conventional vehicle light guide includes a light source 10 emitting light with a predetermined light emission angle and a total reflection part 20 totally reflecting light emitted from the light source 10. The total reflection part 20 is generally configured such that two parallel first total reflection surfaces 21 and second total reflection surfaces 22 are formed in a case shape having an inner space. A scattering point 30 is formed inside the total reflection part 20 to disperse the light as shown in FIG. 1, and light passing through the total reflection part 20 is dispersed through the scattering point 30 and is outside. It is configured to emit light. That is, the light incident from the light source 10 to the total reflection part 20 travels along the total reflection part 20 through a process of being reflected through the first and second total reflection surfaces 21 and 22 of the total reflection part 20. And is distributed through the dispersion point 30 and emits light at a right angle in the traveling direction. However, the conventional vehicle light guide has a problem that the buyer can select a vehicle through a design in a state where the aesthetics are deteriorated because the shape of the conventional vehicle light guide is mounted on the rear lamp of the vehicle body.

In order to overcome this limitation, as shown in (b) of FIG. 1, a bezel 1 having a housing shape and a light source 2 inserted into the bezel 1 and emitting light to the rear lamp of the vehicle, and the light source (2) to guide the light emitted from, but on one side of the vehicle lighting consisting of the light guide panel 3 is inserted into the printing pattern (3-1) is provided with a printing pattern therein to increase the design effect Although the structure is proposed, this reduces the light extraction efficiency by using a printing pattern, and causes a problem in the reliability of the printing ink, and the light source is inserted only on one side, and thus there is a limit in satisfying the luminous intensity and light distribution.

Korea Patent Publication No. 10-1181012

The present invention has been made to solve the above-described problem, an object of the present invention is to mount a LED that emits light of different colors to the light source module passing through the center of the optical guide module 2 integrated in one light source lamp By providing lighting devices that can realize two lights, the bezel-less surface light source can be realized by eliminating the bezel necessary for lighting. To provide a lighting unit that can increase the.

As a means for solving the above problems, the present invention provides a light guide module including a plurality of mounting groove; A light source module including a plurality of LED light sources inserted into the mounting grooves; The plurality of LED light sources provide a lighting unit having at least two LEDs having different light output directions. This allows two lights to be realized in one integrated light, increasing design freedom and increasing process costs by integrating lighting for tail & stop and turn signals. Make sure

According to the present invention, it is possible to implement two lights integrated in one light source lamp by mounting an LED emitting light of different colors to a light source module passing through the center of the light guide module.

In addition, it is possible to implement a surface light source for a vehicle having a bezel-less structure by removing the bezel essential for vehicle lighting, thereby reducing mechanical constraints, thereby improving design freedom and diversifying, thereby increasing commerciality.

Furthermore, by implementing the two lights in one integrated lighting, it is possible to reduce the cost through the integration of lighting for tail & stop and turn signal.

In particular, in order to satisfy the light distribution characteristics, the optical pattern is arranged on the surface of the optical guide module to increase the light efficiency, and by adjusting the shape of the mounting groove into which the light source is inserted, it is possible to solve the problem of poor ejection when the optical guide module is ejected.

When the LED is used as a light source, a light shielding pattern is provided to prevent deterioration of the light guide module generated from the LED, thereby improving reliability.

1 is a conceptual diagram showing the structure of a conventional vehicle lighting apparatus.
2 is a conceptual view showing a perspective view of a lighting unit according to the present invention, Figure 3 is a cross-sectional conceptual view showing a cross-sectional view 'A' of FIG.
4 is a conceptual diagram illustrating an embodiment of the arrangement of the light source module according to the present invention.
5 is a conceptual diagram illustrating a structure of an optical guide module according to the present invention in FIG. 3.
6 to 9 illustrate various embodiments of the mounting groove in the present invention.
FIG. 10 is a conceptual diagram illustrating a configuration of a diffusion member disposed on an optical guide module in the structure of the lighting unit of FIG. 3 according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. In the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and duplicate description thereof will be omitted. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

2 is a conceptual view showing a perspective view of a lighting unit according to the present invention, Figure 3 is a cross-sectional conceptual view showing a cross-sectional view 'A' of FIG.

2 and 3, the lighting unit 100 according to the present invention includes a light guide module 110 including a plurality of mounting grooves 111, and a plurality of LED light sources inserted into the mounting grooves 111. The light source module 120 including the 122, and the plurality of LED light source 122 provides an illumination unit, characterized in that at least two or more LEDs having different light exit directions are provided. That is, the lighting unit 100 according to the present invention is coupled to a structure in which a light source is inserted into the light guide module 110, but the light source 122 mounted on the light source module 120 has a different light output direction. Characterized in that arranged to face.

To this end, the light source module 120 may be disposed between the outermost parts B and C and the central portion D of the optical guide module 110. That is, as shown in FIG. 2, the position where the light source module is disposed may be disposed at a position slightly away from the central portion D or the central portion of the optical guide module 110. In this case, the light source module 120 may include a printed circuit board 121 on which the light source 122 is mounted. In particular, the LEDs having different light output directions may be mounted on the printed circuit board 121. have.

In particular, as shown in FIG. 3, which shows a cross section in the AA ′ direction in FIG. 2, the cross-mounted LEDs 122 include a plurality of first LED groups 122a and 122c that emit in a first direction, and The second LED groups 122b and 122d emitted in a second direction opposite to the first direction may be arranged to emit light of different colors. For example, the first LED group may be disposed in red, and the second LED group may be disposed in yellow. For example, as shown in FIG. 3, red and yellow LEDs are alternately disposed, red LEDs emit light in a first direction, and yellow LEDs may be arranged to emit light in a second direction. .

This arrangement of the cross structure, as shown in Figure 4, in addition to (a) the LED is alternately arranged in the emission direction, one by one, (b) two or more LEDs emit light in the first direction or the second direction It is also possible to arrange to.

That is, in the present invention, the LEDs emitting light of different colors may be mounted on the light source module penetrating the center of the optical guide module to implement two lights integrated in one light source lamp. When such a structure is applied to vehicle lighting, the bezel-less surface light source can be realized by removing the bezel necessary for vehicle lighting, thereby reducing mechanical constraints, improving design freedom, and diversifying the product. In addition, by implementing the two lights in one integrated lighting, it is possible to reduce the cost through the integration of tail & stop light and turn signal. For example, when the first LED group is red and the second LED group is yellow, the red flashing light and the yellow flashing light are implemented in one lighting unit, and the tail light, the brake light and the turn signal of the vehicle are implemented. The signal of can be implemented in one lighting unit.

In addition, as shown in FIG. 3, the present invention further includes a reflective member 130 disposed between the surface of the optical guide module 110 on which the mounting groove 111 is formed and the printed circuit board 121. Can be configured. The reflective member 130 is formed of a material having a high reflection efficiency to reduce light loss by reflecting the light emitted from the light source module 120 to the upper portion where the diffusion member 290 is located. The reflective member 130 may be formed in the form of a film, and may include a synthetic resin containing dispersion of white pigment in order to implement the characteristics of promoting light reflection and light dispersion. For example, titanium oxide, aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calcium carbonate may be used as the white pigment, and polyethylene terephthalate, polyethylene naphthalate, acrylic resin, colicarbonate, polystyrene, polyolefin may be used as the synthetic resin. , Cellulose source acetate, weather resistant vinyl chloride, etc. may be used, but is not limited thereto. A reflective pattern may be formed on the surface of the reflective member 130, and the reflective pattern serves to uniformly transmit light to the diffusion member 140 by scattering and dispersing incident light. The reflection pattern may be formed by printing on the surface of the reflective member 130 using a reflective ink including any one of TiO ₂ , CaCo ₃ , BaSo 4, Al ₂ O _{3 ,} Silicon, and PS, but is not limited thereto.

5 is a conceptual diagram illustrating a structure of an optical guide module 110 according to the present invention in FIG. 3. 3 and 5, the optical guide module 110 according to the present invention includes a plurality of mounting grooves 111, and an LED light source 122 is inserted into the mounting groove 111. In the present invention, it is preferable that the LED light source 122 uses a side view type. In particular, the optical guide module 110 may form first optical patterns 112 and 113 formed on the surface of the optical guide module, and the first optical pattern is directly formed on the surface of the optical guide module. It can be implemented by the intaglio irregularities pattern. The shape of the cross-section of the uneven pattern can be variously adjusted, such as triangular, hemispherical, pyramid, horseshoe, etc., thereby improving light distribution characteristics.

In addition, in the case of the mounting groove 111, as shown in Figure 5, may be implemented in a three-dimensional structure of the cuboid, or hemispherical structure, as shown in Figure 6, the mounting groove, The upper surface of the hole formed in the inner direction of the optical guide module and the lower surface and the inner surface of the open structure, the width of the upper surface and the lower surface is the same, or the width of the lower surface is wider than the upper surface Can be formed. In addition, at least one curvature having a curvature may be formed at an edge portion where the upper surface and the inner surface of the mounting groove meet. The curvature may have a radius of curvature R of less than 1/2 of the length of the short side of the upper surface of the receiving groove. Of course, not limited to this, it is possible to maximize the light extraction efficiency through the mounting grooves of various shapes.

That is, when the lighting unit is used in a vehicle lamp and applied to a flat surface light source as shown in FIG. 7, the shape of the receiving groove is rectangular in cross section as shown in FIGS. 7A and 7B. Although it is sufficient to implement, if the location where the lamp of the vehicle is arranged has a curved or deformed bending arrangement design, such as shown in Figs. It is desirable to be able to maximize. In this case, the height (Y) of the receiving groove is preferably to have 1.3 to 1.4 times the height (y) of the LED, and if the value is larger than this, the thickness of the optical guide module will inevitably increase. There is a growing problem.

Furthermore, the width X of the receiving groove preferably has a width of 1.1 to 1.2 times the width x of the LED. When the width X is larger than this, the loss of the light emitted from the light source increases and the efficiency decreases.

In the case of Figure 8, the structure of the receiving groove of Figure 7 can be implemented to give a slope to have an inclination on the side, in this case, the inclination (θ) leading the end of the lower width in the upper edge portion of the receiving groove is 5 It is preferable to form in the range which satisfy | fills ° -10 degree. Outside this range, the loss of light becomes large.

In addition, in the case of Figure 9, the basic structure of the receiving groove of Figure 7 implemented as a structure having a curvature rounded on the side, the radius of the imaginary circle formed by the curvature formed by the outer edge of the side (R) is formed in the range of 1.1x ~ 1.4y times based on the width (x) and height (y) of the LED light source can maximize the light efficiency.

FIG. 10 illustrates a configuration of the diffusion member 140 disposed above the light guide module 110 in the structure of the lighting unit of FIG. 3 according to the present invention.

That is, the diffusion member 140 may be further included above the light guide module 110 of the lighting unit according to the present invention. In this case, a spacer 142 may be formed between the optical guide module 110 and the diffusion member 140. A light blocking or reflective second optical pattern 141 is formed on the surface of the diffusion member or the surface of the optical guide module.

The diffusion member 140 serves to uniformly spread the light emitted through the light guide module 110 over the entire surface. The diffusion member 140 may be generally formed of an acrylic resin, but is not limited thereto. In addition, polystyrene (PS), polymethyl methacrylate (PMMA), cyclic olefin copoly (COC), and polyethylene terephthalate (PET) may be used. It can be made of any material capable of performing a diffusion function, such as a high permeability plastic such as resin.

The second optical pattern 141 basically serves to prevent the light emitted from the light source module 120 from being concentrated. The second optical pattern 141 may be formed as a light shielding pattern so that a part of the light shielding effect may be implemented in order to prevent a phenomenon in which light is excessively strong and optical characteristics deteriorate or yellowish light is emitted. The light shielding pattern may be formed by printing on the top surface of the light guide module 110 using the light shielding ink, or by performing a printing process on the top or bottom surface of the diffusion member.

The second optical pattern 141 may be implemented not to completely block light, but to adjust light shielding or diffusivity of light with one optical pattern to perform a function of partially blocking and diffusing light. Furthermore, more specifically, the optical pattern 141 according to the present invention may be implemented as a superimposed printed structure of a complex pattern. The superimposition printing structure refers to a structure that forms one pattern and prints another pattern shape on the upper portion thereof. For example, in implementing the optical pattern 141, a light shielding ink including any one or more materials selected from TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , and Silicon is formed on a lower surface of the polymer film in the light emitting direction. It can be implemented as a superimposition structure of the light shielding pattern formed using a diffusion pattern formed by using, and a light shielding ink containing Al or a mixture of Al and TiO ₂ .

That is, after forming the diffusion pattern on the surface of the polymer film by white printing, it is also possible to form a light shielding pattern thereon, or to have a double structure in the reverse order. Of course, it will be apparent that the patterned design of the pattern may be variously modified in consideration of light efficiency, intensity, and light blocking rate. Alternatively, the light-shielding pattern, which is a metal pattern, may be formed on the middle layer in the sequential stacked structure, and a triple structure may be formed on the upper and lower portions thereof, respectively. In such a triple structure, it is possible to select and implement the above-described materials. As a preferred example, one of the diffusion patterns is implemented using TiO ₂ having excellent refractive index, and CaCO ₃ having excellent light stability and color sense is used together with TiO _2. It is possible to secure the efficiency and uniformity of light through the triple structure of the structure that implements other diffusion patterns and implements the light shielding pattern using Al having excellent concealment. In particular, CaCO ₃ enables the final white light through the function of subtracting the exposure of yellow light, thereby realizing more stable light. In addition to CaCO ₃ , particles such as BaSO ₄ , Al ₂ O ₃ , and silicon beads Larger, similarly structured inorganic materials may be used. In addition, the optical pattern 141 is preferably formed by adjusting the pattern density so that the pattern density becomes lower as the LED light source moves away from the emission direction.

In addition, the spacer 142 formed between the diffusion member 140 and the optical guide module 110 may increase the uniformity of the light supplied to the diffusion member 140 through the optical guide module 110. As a result, it is possible to implement the effect of improving the uniformity (uniformity) of the light diffused and emitted through the diffusion member 140. At this time, in order to minimize the deviation of the light transmitted through the resin layer 150, the thickness of the spacer 142 may be formed in the range of more than 0 to 20mm. It may be configured to further include an external lens disposed on the diffusion member.

Lighting device according to the present invention is applicable to various lamp devices, such as vehicle lamps, home lighting devices, industrial lighting devices that require lighting. For example, when applied to a vehicle lamp, it is possible to apply to headlights, vehicle interior lighting, doorscar, rear lights and the like. In addition, the lighting device of the present invention can be applied to the field of the backlight unit applied to the liquid crystal display device, and in addition, it can be said that it can be applied to all the lighting related fields that are currently developed and commercialized or can be implemented according to future technology development.

In the detailed description of the invention as described above, specific embodiments have been described. However, many modifications are possible without departing from the scope of the invention. The technical spirit of the present invention should not be limited to the described embodiments of the present invention, but should be determined not only by the claims, but also by those equivalent to the claims.

110: optical guide module
111: mounting groove
112, 113: first optical pattern
120: light source module
121: printed circuit board
122: LED
130: reflective member
140: diffusion member
141: second optical pattern
142: spacer
150: external lens
200: housing

Claims (21)

An optical guide module including a plurality of mounting grooves; And
It includes a light source module disposed in the mounting groove,
The light source module includes a printed circuit board and a plurality of LEDs arranged in a line in a third direction on the printed circuit board,
The plurality of LEDs may include a first LED group emitting light in a first direction perpendicular to the third direction and a second LED group emitting light in a second direction perpendicular to the third direction and opposite to the first direction. Are placed crossing each other,
The color of the light emitted by the first LED group and the color of the light emitted by the second LED group are different from each other,
A diffusion member disposed above the optical guide module, a spaced portion between the optical guide module and the diffusion member, and a second optical pattern for reflection disposed between the optical guide module and the diffusion member,
The separation unit and the reflective second optical pattern is disposed in a direction parallel to the upper surface of the optical guide module.
The method according to claim 1,
The light source module is disposed in the center of the optical guide module, or disposed between the outermost part and the center of the optical guide module,
The height of the mounting groove has a 1.3 to 1.4 times the height of the LED,
The pole of the mounting groove is a lighting unit having a 1.1 to 1.2 times the width of the LED.
delete delete The method according to claim 1,
The first LED group is red (RED), the second LED group is yellow (AMBER) lighting unit.
The method according to claim 1,
The optical guide module further includes a reflective member disposed between the surface of the optical guide module and the printed circuit board, and a first optical pattern disposed on the reflective member surface and embedded in the optical guide module.
The first optical pattern is,
Intaglio irregularities are formed directly on the surface of the optical guide module,
The first optical pattern is a lighting unit formed of a reflective ink containing any one of TiO ₂ , CaCO ₃ , BaSO ₄ , Al ₂ O ₃ , Silicon, PS.
delete delete delete delete The method according to claim 1,
The mounting groove is composed of an upper surface of the hole formed in the inner direction of the optical guide module and a lower surface and the inner surface of the open structure,
The width of the upper surface and the lower surface is the same, or the width of the lower surface is wider than the upper surface,
At least one curvature having a curvature is formed at an edge portion where the upper surface and the inner surface of the mounting groove meet and the curvature portion has a curvature radius of 1/2 or less of the length of the short side of the upper surface of the mounting groove ( Lighting unit having R).
delete delete delete delete delete The method according to claim 11,
The second optical pattern uses a light shielding ink including a diffusion pattern formed by using a light shielding ink including at least one material selected from TiO ₂ , CaCO ₃ , BaSO ₄ , and silicon, or a mixture of Al and Al and TiO ₂ . And a light shielding pattern, wherein the diffusion pattern and the light shielding pattern are arranged in an overlapping structure.
The method according to claim 17,
The diffusion pattern is a lighting unit formed in a structure printed on at least one of the upper surface or the lower surface of the light shielding pattern.
The method according to claim 1,
Lighting unit further comprises an external lens disposed on the diffusion member.
delete delete

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