Blind spot detection module

• US 10,252,674 B2
• Filed: 12/17/2013
• Issued: 04/09/2019
• Est. Priority Date: 12/17/2012
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Park, Moo Ryong, Kim, Jin Hee, Lee, Byoung Eon, Yang, Hyun Duck, Park, Kwang Ho
• Primary Examiner(s): McNally, Kerri L
• Assistant Examiner(s): Tran, Thang D
• Application Number:
  US14/653,141
• Publication Number:
  US 20150329047A1
• Time in Patent Office: 1,939 Days
• Field of Search: 340435, 340 101- 106, 3405721-5729
• CPC Class Codes: B60Q 9/008 for anti-collision purposes
• CPC Class Codes: B60R 1/12 Mirror assemblies combined with other articles, e.g. clocks
• CPC Class Codes: B60R 2001/1215 with information displays
• CPC Class Codes: B60R 2300/802 for monitoring and displaying vehicle exterior blind spot views
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0041 provided in the bulk of the light guide

Abstract

Provided is a blind spot detection module, including: 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.

Claims

1. A blind spot detection module, comprising:

a light source module configured to emit light based on a sensor signal indicating detection of an object; and

a reflector module provided on the light source module and including a warning optical pattern to transmit light emitted from the light source module,

wherein the light source module includes;

a light emitting element provided on a printed circuit board and including a light emitting diode of a side view type;

a light guide member that covers a top surface and side surfaces of the light emitting element;

a reflection member provided between the printed circuit board and the light guide member and reflecting the light emitted from the light emitting element toward the reflector module;

a light guide layer provided between the light guide member and the reflection member; and

an optical pattern layer including first optical patterns provided between a first optical sheet and a second optical sheet, wherein the first optical patterns are configured to partially cover the light emitting element to shield light, and the first optical sheet is directly provided on the light guide member,

wherein the light guide layer has a first surface that contacts the light guide member and a second surface opposite to the first surface, the reflection member having a first surface that faces toward the light guide layer and a second surface opposite to the first surface of the reflection member,

the light guide layer includes a plurality of optical patterns that protrude from the second surface of the light guide layer toward the reflection member, and the light emitting element passes through the light guide layer by extending through the first surface and the second surface of the light guide layer,

wherein an adhesive pattern is provided between the first surface of the reflection member and the second surface of the light guide layer at areas between separate ones of the plurality of optical patterns, the adhesive pattern being in a shape that corresponds to areas between separate ones of the plurality of optical patterns to adhere the light guide layer to the reflection member,

wherein a plurality of air gaps are formed between the second surface of the light guide layer and the first surface of the reflection member due to the plurality of optical patterns and no air gap is formed at a portion at which the adhesive pattern is provided, and

wherein the reflector module includes;

a reflector provided at a position that corresponds to a light emitting surface of the light guide member; and

a diffusion member provided on a bottom surface of the reflector, the diffusion member being spaced apart from the optical pattern layer to form a space.

2. The blind spot detection module of claim 1, wherein each of the first optical patterns is formed in an overlapping structure of a diffusion pattern and a light shielding pattern, the diffusion pattern being formed using a light shielding ink containing at least one material selected from among TiO₂, CaCO₃, BaSO₄, Al₂O₃, and Silicon, and the light shielding pattern being formed using a light shielding ink containing Al, or a mixture material of Al and TiO₂.

3. The blind spot detection module of claim 1,

wherein the light guide member is made of a resin material to completely cover the light emitting element,

wherein the resin material is composed of an ultraviolet curable resin containing at least one of urethane acrylate, epoxy acrylate, polyester acrylate, polyether acrylate, polybutadiene acrylate, and silicon acrylate.

4. The blind spot detection module of claim 3, wherein the resin material further contains a diffusion material intended for diffusing light and composed of any one selected from among silicon, silica, glass bubble, polymethyl methacrylate (PMMA), urethane, Zn, Zr, Al2O3, and acryl.

5. The blind spot detection module of claim 1, wherein the reflection member includes a reflection pattern made of any one material of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon, and PS (Polystyrene) provided on a surface of the reflection member that faces the plurality of optical patterns of the light guide layer.

6. The blind spot detection module of claim 5, wherein the reflection member is any one of a transparent PET (polyethylene terephthalate) sheet, a white PET (polyethylene terephthalate) sheet, and an Ag sheet.

7. The blind spot detection module of claim 1, further comprising a reflective shielding module having an opening area in a light emitting surface direction and adopted to receive the light source module.

8. The blind spot detection module of claim 7, wherein the reflective shielding module is made of a material containing any one of Al, PC, PP, ABS, and PBT.

9. The blind spot detection module of claim 7, wherein the reflector module is provided to cover the opening area of the reflective shielding module.

10. The blind spot detection module of claim 8, further comprising:

a sensor part adopted to sense an object in an area behind a vehicle; and

a control part adopted to receive a signal of the sensor part and to control light emission of the light source module.

11. The blind spot detection module of claim 1, wherein the reflection member and the light shielding pattern have the same color.

12. A warning system for a vehicle including a blind spot detection module, wherein the blind spot detection module includes:

a sensor part adopted to sense an object in vehicle prescribed region;

a control part adopted to receive a signal of the sensor part and to control a light emitting signal;

a light source module implemented with a light emitting element that emits light according to a control signal of the control part, and a resin material that guides light; and

a reflector module spaced apart from the light source module and including a warning optical pattern through which emitted light passes,

wherein the light source module includes;

a light emitting element provided on a printed circuit board and including a light emitting diode of a side view type;

a light guide member that covers a top surface and side surfaces of the light emitting element;

a reflection member provided between the printed circuit board and the light guide member and reflecting the light emitted from the light emitting element toward the reflector module;

a light guide layer provided between the light guide member and the reflection member; and

an optical pattern layer including first optical patterns provided between a first optical sheet and a second optical sheet, wherein the first optical patterns are configured to at least partially cover the light emitting element to shield a light, and the first optical sheet is directly provided on the light guide member,

wherein the light guide layer has a first surface that contacts the light guide member and a second surface opposite to the first surface, the reflection member having a first surface that faces toward the light guide layer and a second surface opposite to the first surface of the reflection member,

the light guide layer includes a plurality of optical patterns that protrude from the second surface of the light guide layer toward the reflection member, and the light emitting element passes through the light guide layer by extending through the first surface and the second surface of the light guide layer,

wherein an adhesive pattern is provided between the first surface of the reflection member and the second surface of the light guide layer at areas between separate ones of the plurality of optical patterns, the adhesive pattern being in a shape that corresponds to areas between separate ones of the plurality of optical patterns to adhere the light guide layer to the reflection member,

wherein a plurality of air gaps are formed between the second surface of the light guide layer and the first surface of the reflection member due to the plurality of optical patterns and no air gap is formed at a portion at which the adhesive pattern is provided,

wherein the reflector module includes;

a reflector provided at a position that corresponds to a light emitting surface of the light guide member; and

a diffusion member provided on a bottom surface of the reflector, the diffusion member being spaced apart from the optical pattern layer to form a space.