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EP-4094989-B1 - OPTICAL ASSEMBLY AND REARVIEW MIRROR ASSEMBLY COMPRISING SAME

EP4094989B1EP 4094989 B1EP4094989 B1EP 4094989B1EP-4094989-B1

Inventors

  • LEE, DONG HYUN

Dates

Publication Date
20260513
Application Date
20210119

Claims (13)

  1. An optical assembly (10) comprising: a housing (300) having an inclined bottom surface (310), a plurality of inner surfaces (320) around an outer periphery of the bottom surface, and a receiving space (305) in which an upper portion is opened; a lighting module (400) disposed on the inclined bottom surface; an optical member (500) disposed on the lighting module; and a cover member (600), wherein the lighting module (400) includes: a substrate (401) inclinedly disposed on the inclined bottom surface (310); at least one light emitting device (100) disposed on the substrate (401); and a resin layer (420) sealing the light emitting device (100) and the substrate (401), wherein an upper surface of the resin layer (420) emits light by diffusing light emitted from the light emitting device (100), wherein the plurality of inner surfaces (320) includes a first inner surface (IS1) adjacent to the light emitting device (100), a second inner surface (IS2) facing the first inner surface, and third and fourth inner surfaces (IS3, IS4) facing each other and disposed between the first and second inner surfaces, wherein the optical member (500) is disposed in the receiving space (305), characterized in that the cover member (600) disposed in the receiving space (305) on the optical member (500), wherein a height between the bottom surface of the housing (300) and an upper surface of the housing (300) increases from the first inner surface (IS1) toward the second inner surface (IS2), and decreases from the third inner surface (IS3) toward the fourth inner surface (IS4), wherein an upper surface of the optical member (500) is inclined at a first inclination angle (a1) with respect to the upper surface of the housing (300) based on the direction from the first inner surface (IS1) toward the second inner surface (IS2), and the upper surface of the optical member (500) is inclined at a second inclination angle (a2) with respect to the upper surface of the housing (300) based on the direction from the third inner surface (IS3) toward the fourth inner surface (IS4), and wherein the lower surface of the cover member (600) is inclined at the first inclination angle (a1) with respect to the upper surface of the lighting module (400) based on the direction from the first inner surface (IS1) toward the second inner surface (IS2), and the lower surface of the cover member (600) is inclined at the second inclination angle (a2) with respect to the upper surface of the cover member (600) based on the direction from the third inner surface (IS3) toward the fourth inner surface (IS4).
  2. The optical assembly of claim 1, wherein the inclined bottom surface (310) has the first inclination angle (a1) with respect to the upper surface of the housing (300), wherein the first inclination angle is 15 to 40 degrees.
  3. The optical assembly of claim 2, wherein the lighting module (400) has a constant thickness, and is disposed on the bottom surface at the first inclination angle (a1) with respect to the upper surface of the housing.
  4. The optical assembly of claim 3, wherein an optical axis of the light emitting device is inclined at the first inclination angle with respect to the upper surface of the housing.
  5. The optical assembly of claim 1, wherein the lighting module (400) includes a reflective member (410) disposed between the substrate and the resin layer, wherein the reflective member (410) includes an opening in which a lower portion of the light emitting device is disposed, wherein the reflective member (410) includes a plurality of dots (411) protruding from an upper surface of the reflective member.
  6. The optical assembly of any one of claims 1 to 5, wherein the inner surfaces of the housing include a fifth inner surface (IS5) disposed between the second inner surface and the third inner surface, and a sixth inner surface (IS6) disposed between the second inner surface and the fourth inner surface, wherein a height between the bottom surface of the housing (300) and the upper surface of the housing is the highest in a region adjacent to the fifth inner surface, wherein a height between the bottom surface of the housing (300) and the upper surface of the housing is the lowest at a first intersection point between the first inner surface and the fourth inner surface, wherein a planar shape of the lighting module is a same as a shape of the bottom surface of the housing.
  7. The optical assembly of any one of claims 1 to 5, wherein an upper surface of the cover member (600) is disposed on a same plane as the upper surface of the housing, wherein a thickness between the upper surface and a lower surface of the cover member (600) becomes thinner toward the fourth inner surface from the third inner surface, wherein the second inclination angle (a2) is 15 to 40 degrees.
  8. The optical assembly of any one of claims 1 to 5, wherein a material of the housing or a surface of the receiving space comprises a black color.
  9. A rear-view mirror assembly comprising: an optical assembly according to any one of claims 1 to 8; a blocking member (700) disposed on the optical assembly (10) and including an opening region (710); and a mirror member (820) disposed on the blocking member.
  10. The rear-view mirror assembly of claim 9, wherein a partial region of the mirror member (820) transmits the light emitted from the optical assembly (10)..
  11. The rear-view mirror assembly of claim 9 or 10, wherein a lower surface of the optical member (500) has a shape corresponding to an upper surface of the lighting module (400).
  12. The rear-view mirror assembly of claim 11, further comprising: an indicator portion (850) formed in at least one of the opening region of the blocking member (700) and one region of the mirror member overlapping the opening region (710), and wherein the indicator portion (850) is a rear-view mirror assembly disposed in a region overlapping the plurality of dots.
  13. The rear-view mirror assembly of claim 11, wherein the lighting module (410) includes a light blocking portion (425) disposed on the resin layer, wherein the light blocking portion (425) is disposed in a region that does not overlap the opening region, wherein a thickness between the upper surface and the lower surface of the cover member (600) becomes thinner toward the fourth inner surface from the third inner surface, wherein the inner surfaces of the housing (300) include a fifth inner surface (is5) disposed between the second inner surface and the third inner surface, and a sixth inner surface (IS6) disposed between the second inner surface and the fourth inner surface, wherein a height between the bottom surface of the housing (300) and the upper surface of the housing is the highest in a region adjacent to the fifth inner surface, and wherein a height between the bottom surface of the housing (300) and the upper surface of the housing is the lowest at a first intersection point between the first inner surface and the fourth inner surface.

Description

[Technical Field] The invention relates to an optical assembly having a lighting module, the lighting module having a light emitting device and providing a surface light source. The invention relate to a rear-view mirror assembly including an optical assembly. [Background Art] Typical lighting applications include vehicle lights as well as backlights for displays and signage. Light emitting devices, for example, light emitting diodes (LEDs) have advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness compared to conventional light sources such as fluorescent lamps and incandescent lamps. Such the light emitting diode is applied to various optical assemblies such as various display devices, indoor lights, or outdoor lights. Recently, as a light source for a vehicle, a lamp employing a light emitting diode has been proposed. For example, light emitting diodes are being applied to vehicle headlights, tail lights, turn signals, and the like. Since the light emitting diode has a small size, it is possible to increase the design freedom of the lamp. In addition, compared to incandescent lamps, light emitting diodes are advantageous in that they consume less power and have a semi-permanent lifespan. However, since the directivity angle of light emitted from the light emitting diode is small, when the light emitting diode is used as a vehicle lamp, there is a demand for increasing the light emitting area of the lamp using the light emitting diode. For example, the light emitting diode may be applied to a blind spot detection (BSD) system. The blind spot detection system is a system that detects other vehicles located behind and to the side of the driver with a sensor device of the vehicle, and provides information about it to the driver through visual, auditory, tactile, and the like. In such the blind spot detection system, a light emitting diode may be disposed in a side mirror, a rear-view mirror, or an A-pillar region of a vehicle to visually provide rear sight information to the driver. However, as light is emitted in various directions from the light emitting diodes, there is a problem in that visual information is not effectively provided to the driver. In addition, there is a problem in that the light emitted from the light emitting diode may be emitted in the direction of the driver of another vehicle, thereby obstructing the view and causing an accident. The document EP2933550A1 provides a blind spot detection module. The blind spot detection module includes: a light source module linked with a sensor signal for detection of an object in an area behind a vehicle to emit light; and a reflector module including a warning optical pattern for transmitting light emitted from the light source module, wherein the light source module comprises a light guide member adopted to receive a light emitting element and to guide light to the reflector module. The document US2019/039508A1 provides a warning lamp used in lane change at blind zone of a vehicle. The warning lamp includes a light source and a light guide including a light entrance surface, a first reflective surface, a second reflective surface, and a light exit surface. The light entrance surface is located above the light source so that the light emitted from the light source is converted to parallel light through the light entrance surface. The first reflective surface is arranged aslope above the light entrance surface. Sides of the first reflective surface are provided with the second reflective surface and the light exit surface, respectively. The first and second reflective surface are provided with total reflection stripes configured so that said parallel light is totally reflected to the second reflective surface through the first reflective surface and then totally reflected by the second reflective surface to said light exit surface to form uniform warning light. Accordingly, there is a need for a new optical assembly and a blind spot warning device that may solve the above problems. [Disclosure] [Technical Problem] The invention is to provide an optical assembly capable of improving the luminous intensity of a surface light source and a blind spot warning device. In addition, an embodiment is to provide an optical assembly capable of improving the uniformity of a surface light source and a blind spot warning device. In addition, an embodiment is to provide an optical assembly capable of controlling a light exit direction and a blind spot warning device. In addition, an embodiment is to provide an optical assembly capable of controlling a luminance value of light emitted toward a driver and a luminance value of light emitted toward a vehicle positioned on the side direction and rear direction of the driver, and an optical assembly and blind spot warning device. [Technical Solution] An optical assembly according to the invention is defined in claim 1. An optical assembly according