KR102478123B1 - lamp for vehicle - Google Patents

Abstract

In the present invention, ineffective light generated as a plurality of light source panels are overlapped with each other is reflected toward the light source panel through a reflective member and then emitted again from the light source panel, so that the ineffective light is emitted as effective light to ensure light efficiency. are introduced

Description

lamp for vehicle {lamp for vehicle}

The present invention relates to a vehicle lamp that secures the light efficiency of an OLED-applied lamp.

The front of the vehicle is equipped with a front lamp (headlamp) to illuminate the road in front of the vehicle at night, and the rear of the vehicle is equipped with a back lamp that turns on when shifting to reverse gear and a brake lamp that turns on when the brake pedal is pressed. are provided Accordingly, it is possible to prevent an accident such as a collision accident in advance by allowing the driver of the following vehicle to recognize the driving situation of the vehicle, such as when the vehicle turns or stops.

Recently, a specific image is being implemented by giving a three-dimensional effect to the lamp, and for this, OLED (Organic Light Emitting Diodes) are applied to implement lamp lighting of various designs.

However, when various designs are implemented using OLEDs, there are cases in which the OLEDs are overlapped. At this time, there is a problem in that light efficiency is lowered as invalid light is generated in an overlapping section between OLEDs.

The matters described as the background art above are only for improving understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

KR 10-2014-0184301 A (2014.12.19)

The present invention has been proposed to solve this problem, and an object of the present invention is to provide a vehicle lamp with improved light efficiency by utilizing ineffective light due to an overlapping section generated when a plurality of OLEDs are applied as effective light.

A vehicle lamp according to the present invention for achieving the above object is configured to emit light on the front part and reflect light when light is incident, and consists of a plurality of light source panels arranged in the forward and backward directions; And installed on the rear side of the light source panel, when some light irradiated from the rear side light source panel is incident on the rear side of the front side light source panel, it is reflected so that it moves back to the rear side light source panel, thereby irradiating from the rear side light source panel to the front side light source panel It includes; a reflection member that causes the light to be reflected back by the rear side light source panel and diverged.

The light source panel is composed of a glass substrate, a light emitting material, and a heat sink, and the light emitting material includes an electrode material so that light is reflected when light is incident on the light source panel.

In a state in which the plurality of light source panels are arranged in parallel in the front-back direction, a portion of the other end of the front-side light source panel overlaps a portion of one end of the rear-side light source panel, and a reflective member is installed on the other end of the front-side light source panel to rear It is characterized in that some of the light irradiated from the side light source panel is reflected.

The reflective member is characterized in that it is formed to extend to one side with an angle from the other end of the front-side light source panel.

The installation angle of the reflective member is characterized in that it is calculated according to the following formula.

The reflective member is characterized in that it is formed to extend to one side with a curvature at the other end of the front-side light source panel.

The reflective member extends while drawing a parabola, and the focal point of the parabola is positioned to be spaced apart from the other end of the front light source panel on the same line or on the other side from the rear light source panel.

The reflective member is characterized in that the focal point of the parabola is spaced apart from the front of the rear light source panel.

The reflective member is characterized in that the focal point of the parabola is spaced apart from the rear side of the rear light source panel.

The reflective member is characterized in that a plurality of protrusions repeatedly protrude from the end of the other end of the front-side light source panel toward one end.

The protrusion constituting the reflective member is characterized in that it is determined according to the following formula.

In the vehicle lamp having the structure as described above, ineffective light generated as a plurality of light source panels are overlapped with each other is reflected toward the light source panel side through the reflective member and then emitted from the light source panel, so that the invalid light is emitted as effective light, thereby increasing light efficiency. this is secured

1 is a view showing a vehicle lamp according to an embodiment of the present invention.
2 and 3 are views for explaining a first embodiment of a reflective member according to the vehicle lamp shown in FIG. 1;
4 and 5 are views for explaining a second embodiment of a reflective member according to the vehicle lamp shown in FIG. 1;
6 to 8 are views for explaining a third embodiment of a reflective member according to the vehicle lamp shown in FIG. 1;
9 is a view for explaining a light source panel of the vehicle lamp shown in FIG. 1;

Hereinafter, a vehicle lamp according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a view showing a vehicle lamp according to an embodiment of the present invention, FIGS. 2 and 3 are views for explaining a first embodiment of a reflective member according to the vehicle lamp shown in FIG. 1, and FIGS. 4 and 5 is a view for explaining a second embodiment of a reflective member according to a vehicle lamp shown in FIG. 1, and FIGS. 6 to 8 are views for explaining a third embodiment of a reflective member according to a vehicle lamp shown in FIG. 9 is a view for explaining a light source panel of a vehicle lamp shown in FIG. 1 .

The vehicle lamp of the present invention may implement a lamp image of the form shown in FIG. 1 by configuring a plurality of light source panels 10 and arranging them to have partially overlapping sections in the forward and backward directions. However, when the lamp image of the form shown in FIG. 1 is implemented, the light irradiated from the rear light source panel 102 is blocked by the front light source panel 101 and invalid light may be generated. In the present invention, it is intended to improve light efficiency by utilizing ineffective light as effective light.

As shown in Figure 2, the vehicle lamp according to the present invention is configured to emit light and reflect light when light is incident on the front part, and is composed of a plurality of light source panels arranged in the forward and backward directions (10); And installed on the rear side of the light source panel 10, when some light irradiated from the rear side light source panel 102 is incident on the rear side of the front side light source panel 101, it is reflected so that it moves to the rear side light source panel 102 again. and a reflective member 20 that allows the light irradiated from the rear light source panel 102 to the front light source panel 101 to be reflected back by the rear light source panel 102 and emitted.

As such, the present invention is composed of a plurality of light source panels 10 and a reflective member 20 installed on the light source panel 10 . Here, the light source panels 10 are arranged in a front-back direction, and may be divided into a front-side light source panel 101 located at the front and a rear-side light source panel 102 located at the rear. That is, among the light source panels 10 adjacent to each other among the plurality of light source panels 10, the light source panel 10 positioned at the front becomes the front light source panel 101, and the light source positioned behind the front light source panel 101. The panel 10 becomes the rear light source panel 102 . This is to separately explain the light source panels 10 adjacent to each other in the plurality of light source panels 10, and the light source panels 10 arranged in the forward and backward directions are front-side light source panels based on the adjacent light source panels 10 ( 101) and the rear light source panel 102, and depending on the number of light source panels 10, a specific type of lamp image can be implemented.

In particular, as can be seen in FIG. 9, the light source panel 10 is composed of a glass substrate 12, a light emitting material 14, and a heat sink 16, and the light emitting material 14 includes an electrode material so that the light source panel ( 10) may be made so that light is reflected upon incident light.

Here, the light emitting material 14 is composed of an organic light emitting layer and an encapsulation layer, and may be configured such that an electrode material is included in the encapsulation layer 16 . That is, the glass substrate 12 may include a first electrode and a second electrode, and an organic light emitting layer of the light emitting material 14 may be interposed between the first electrode and the second electrode. For example, the first electrode is composed of an anode (Andoe), the second electrode is composed of a cathode (Cathode), and the organic light emitting layer may be composed of a light emitting layer, an electromagnetic layer, and the like. The glass substrate 12 and the light emitting material 14 are not limited thereto.

On the other hand, the encapsulation layer constituting the light emitting material is formed to prevent moisture from permeating into the organic light emitting layer, and may be formed of a composite structure of inorganic and organic materials. Such an encapsulation layer may be configured to reflect light by depositing an electrode material made of aluminum. Here, the evaporation material of the encapsulation layer is not limited to aluminum, and other materials capable of reflecting light may be applied in addition to aluminum having good light reflection efficiency. In addition, the light source panel 10 is configured with a heat dissipation plate 16 so that heat generated by light can be dissipated when light is emitted.

As such, the light source panel 10 is composed of Organic Light Emitting Diodes (OLEDs), and in particular, in the encapsulation process, the encapsulation layer constituting the light emitting material 14 is deposited with an electrode material made of aluminum, thereby enabling light reflection. Due to this, the light source panel 10 can reflect incident light as well as emit light.

A reflective member 20 is installed on the rear side of the aforementioned light source panel 10 . Here, the reflective member 20 may be applied as a mirror as it is configured to reflect light, and may be configured to increase reflectance through surface treatment such as plating. As the reflective member 20 is installed on the rear side of the light source panel 10, it reflects light emitted from the rear side of the light source panel 10.

That is, when some of the light emitted from the rear-side light source panel 102 moves to the front-side light source panel 101, the light moved to the front-side light source panel 101 becomes invalid light. The reflecting member 20 installed at the rear part reflects the invalid light back to the rear side light source panel 102 side. In this way, the invalid light reflected by the reflective member 20 may be reflected back from the rear side light source panel 102 and emitted forward, thereby becoming effective light.

As such, in the present invention, the light efficiency is improved by using the ineffective light as the effective light.

In detail, the plurality of light source panels 10 are arranged in parallel in the front-back direction, and a portion of the other end of the front-side light source panel 101 overlaps a portion of one end of the rear-side light source panel 102. The reflective member 20 may be installed at the other end of the front light source panel 101 to reflect some of the light emitted from the rear light source panel 102 .

As such, the plurality of light source panels 10 may implement a lamp image of the form shown in FIG. 1 by arranging portions of end portions overlapping each other. Accordingly, as can be seen in FIG. 2 , light radiated from the rear light source panel 102 in a state in which a part of the other end of the front light source panel 101 and a part of one end of the rear light source panel 102 are overlapped. Some of the invalid light moving toward the front side light source panel 101 is reflected by the reflective member 20 and moves back to the rear side light source panel 102 side, and the invalid light reflected back from the rear side light source panel 102 is It is converted into effective light and emitted forward.

Hereinafter, various embodiments of the reflective member 20 will be described.

As a first embodiment, as shown in FIGS. 2 and 3 , the reflective member 201 may be formed to extend to one side at an angle from the other end of the front light source panel 101 .

This reflective member 201 may be formed in a plane, and extends at an angle from the other end of the front light source panel 101 to reflect some of the light irradiated from the rear light source panel 102 back to the rear light source. It can be moved to the panel 102.

In addition, as can be seen in FIG. 3 , the reflective member 201 may have an installation end 201a extended so as to be bonded to the front light source panel 101, and forms a lamp housing together with the light source panel 10. It can be installed on the base plate (B). In this way, when the light source panel 10 and the reflective member 201 are installed in the lamp housing, they can be detachably installed on the base plate (B) with a snap fit, or can be integrally configured.

In detail, as can be seen in Figure 2, the installation angle of the reflection member 201 can be calculated according to the formula below.

θ: Installation angle of the reflective member

α: Light reflection angle by the rear side light source panel

d: Distance between the front light panel and the rear light panel (mm)

I: Overlapping length of the front light panel and the rear light panel (mm)

According to the above formula, the installation angle at which the reflective member 201 extends from the other end of the front-side light source panel 101 is calculated, and the reflection is reflected by the reflective member 201 by installing the reflective member 201 at the corresponding angle. The emitted light can be reflected back by the rear light source panel 102 and emitted forward without interfering with the front light source panel 101 when diverging.

If, by setting the distance (d) between the front light source panel 101 and the rear light source panel 102 or the overlapping length (I) between the front light source panel 101 and the rear light panel 102, the α value is set. When this increases, the light reflected from the rear light source panel 102 interferes with the front light source panel 101 again, and thus invalid light may be generated. Conversely, when the value of α is reduced, the light reflected from the rear light source panel 102 does not interfere with the front light source panel 101 again, but the light emitting area becomes different as the light movement path is excessively bent. can

Therefore, by regulating the installation angle of the reflective member 201 according to the above formula, the light irradiated from the rear light source panel 102 is reflected by the reflective member 201 and then returned to the rear light source panel 102. When radiating forward, the light is emitted as effective light without interfering with the front-side light source panel 101.

As a second embodiment, as shown in FIGS. 4 and 5 , the reflective member 202 may be formed to have a curvature and extend to one side from the other end of the front light source panel 101 .

This reflective member 202 may be formed to have a curved cross section, and extends with a curvature from the other end of the front light source panel 101 so that the light emitted from the rear light source panel 102 returns to the rear side. It can be incident on the light source panel 102 .

Here, the installation end 202a of the reflective member 202 may be formed to extend so as to be bonded to the front side light source panel 101, and is installed on the base plate B constituting the lamp housing together with the light source panel 10. It can be. In this way, when the light source panel 10 and the reflective member 202 are installed in the lamp housing, they can be detachably installed on the base plate B with a snap fit, or can be integrally configured.

In detail, as can be seen in FIG. 4 , the reflection member 202 extends while drawing a parabola, and the focal point P of the parabola is from the rear side light source panel 102 to the other end of the front side light source panel 101 and It may be located on the same line or spaced apart from the other side.

That is, the reflective member 202 has a focal point and extends while drawing a parabola, and the focal point of the parabola is positioned on the same line as the other end of the front light source panel 101 in the rear light source panel 102, or other By positioning them further apart from each other, light reflected by the reflection member 202 and then reflected back from the rear light source panel 102 can be emitted forward. If the focal point P of the parabola constituting the reflective member 202 is spaced apart from the other end of the front-side light source panel 101 to one side, the light reflected from the rear-side light source panel 102 returns to the front side. Since invalid light is generated by interference with the light source panel 101, the position of the parabolic focal point is regulated.

Here, as the position of the parabolic focal point P is located in front or rear of the rear side light source panel 102, light diffusion may be differently set. That is, when the focal point P of the parabola is positioned to be spaced apart from the front of the rear-side light source panel, the reflection member 202 distributes the light reflected by the reflection member 202 widely to the rear-side light source panel 102. Light spread can be increased.

Conversely, when the focal point (P) of the parabolic line is positioned to be spaced apart from the rear side light source panel 102, the light reflected by the reflection member 202 is relatively narrowly distributed to the rear side light source panel 102. As the light is concentrated, the spread of the light may be reduced.

As the focal point P of this parabola is spaced apart from the rear side light source panel 102 to the front or rear, or to the other side, it may be positioned as the virtual focal point shown in FIG. The position of the focus (P) of may be determined.

In this way, while the reflective member 202 is formed to have a curvature while drawing a parabola, it is possible to differently set the diffusion of light according to the position of the parabolic focal point P, thereby implementing an optimized lamp image according to the lamp specifications.

As a third embodiment, as shown in FIGS. 6 to 8 , the reflective member 203 may repeatedly protrude from the other end of the front light source panel 101 toward one end.

The reflective member 203 is composed of a plurality of projections, and the plurality of projections may be formed in a triangular shape so that light can be reflected in a specific direction, and extends as long as adjacent light source panels 10 overlap in the forward and backward directions. It can be. As such, the reflection member 203 is formed in the form of a plurality of optical projections in the light source panel 10, so that some invalid light irradiated from the rear light source panel 102 is reflected by the projections of the reflection member 203 and then returns to the rear side. By moving to the side light source panel 102, the ineffective light can be converted into effective light as it is reflected back from the rear light source panel 102 and emitted forward. When the reflective member 203 having such a protruding structure is applied, the distance between the light source panels 10 can be reduced.

In detail, as can be seen in FIGS. 6 and 7 , the projection constituting the reflective member 203 may be determined according to the following equation.

θ: inclination angle of protrusion

α: cutting angle of protrusion

d: Distance between the front light panel and the rear light panel (mm)

I: Overlapping length of the front light panel and the rear light panel (mm)

When the inclination angle of the protrusions constituting the reflective member 203 is calculated according to the above formula, when the inclination angle of the protrusion is formed, the light reflected by the reflective member 203 moves to the rear light source panel 102 and moves to the rear side light source panel 102. It can be reflected back from the light source panel 102 and emitted, and in particular, interference with the front side light source panel 101 can be avoided.

If, by setting the distance (d) between the front light source panel 101 and the rear light source panel 102 or the overlapping length (I) between the front light source panel 101 and the rear light panel 102, the α value is set. When this increases, the light reflected from the rear light source panel 102 interferes with the front light source panel 101 again, and thus invalid light may be generated. Conversely, when the value of α is reduced, the light reflected from the rear light source panel 102 does not interfere with the front light source panel 101 again, but the light emitting area becomes different as the light movement path is excessively bent. can

Therefore, by regulating the inclination angle of the protrusion constituting the reflective member 203 according to the above formula, after the light irradiated from the rear light source panel 102 is reflected by the reflective member 203, the rear light source panel ( When radiating forward by 102), effective light can be radiated without interference from the front light source panel 101.

The vehicle lamp having the structure as described above reflects invalid light generated as a plurality of light source panels 10 are overlapped with each other toward the light source panel 10 through the reflective member 20, and then the light source panel 10 By being emitted from the ineffective light is emitted as effective light to secure the light efficiency.

Although the present invention has been shown and described in relation to specific embodiments, it is known in the art that the present invention can be variously improved and changed without departing from the technical spirit of the present invention provided by the claims below. It will be self-evident to those skilled in the art.

10: light source panel 101: front side light source panel
102: rear side light source panel 12: glass substrate
14: light emitting material 16: heat sink
20: reflective member

Claims (11)

a light source panel having a front portion emitting light and reflecting light when light is incident, and being composed of a plurality of light source panels arranged in the forward and backward directions; and
It is installed on the rear side of the light source panel, and when some of the light irradiated from the rear side light source panel is incident on the rear side of the front side light source panel, it is reflected so that it is moved to the rear side light source panel. A vehicle lamp including a reflective member that is reflected back by the rear side light source panel to diverge. The method of claim 1,
The light source panel is composed of a glass substrate, a light emitting material, and a heat sink, and the light emitting material includes an electrode material so that light is reflected when light is incident on the light source panel. The method of claim 1,
The plurality of light source panels are disposed in a state in which a plurality of light source panels are arranged in parallel in the front-back direction, and a part of the other end of the front-side light source panel overlaps a part of one end of the rear-side light source panel,
The reflective member is installed on the other end of the front light source panel to reflect some of the light emitted from the rear light source panel. The method of claim 3,
The reflective member is a vehicle lamp, characterized in that formed to extend to one side with an angle from the other end of the front light source panel. The method of claim 3,
The vehicle lamp, characterized in that the installation angle of the reflection member is calculated according to the following formula.

θ: Installation angle of the reflective member
α: Light reflection angle by the rear side light source panel

d: Distance between the front light panel and the rear light panel (mm)
I: Overlapping length of the front light panel and the rear light panel (mm) The method of claim 3,
The reflective member is a vehicle lamp, characterized in that formed to extend to one side with a curvature at the other end of the front light source panel. The method of claim 6,
The reflective member extends while drawing a parabola, and the focal point of the parabola is positioned to be spaced apart from the rear light source panel to the other end of the front light source panel on the same line or to the other side. The method of claim 7,
The reflective member is a vehicle lamp, characterized in that the focal point of the parabola is positioned to be spaced apart from the front of the rear light source panel. The method of claim 7,
The reflective member is a vehicle lamp, characterized in that the focal point of the parabola is positioned to be spaced apart from the rear of the rear light source panel. The method of claim 3,
The reflective member is a vehicle lamp, characterized in that a plurality of protrusions repeatedly protrude from the other end of the front light source panel toward one end. The method of claim 10,
The projection constituting the reflective member is a vehicle lamp, characterized in that determined according to the following formula.

θ: inclination angle of protrusion
α: cutting angle of protrusion

d: Distance between the front light panel and the rear light panel (mm)
I: Overlapping length of the front light panel and the rear light panel (mm)

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