Display apparatus

Patent metadata

Field	Value
Publication number	US-9776561-B2
Application number	US-201414907586-A
Country	US
Kind code	B2
Filing date	Jul 8, 2014
Priority date	Jul 30, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A display apparatus includes: a substrate having a first surface; a light source that is disposed to the first surface of the substrate; a display plate that is disposed adjacent to the first surface of the substrate; and a light block body that surrounds the light source between the substrate and the display plate. The light source includes a light source body that emits light, a light source base material that has a mount surface, the light source body being mounted to the mount surface, and a mold portion that transmits the light and covers a circumference of the light source body on the mount surface of the light source base material. The mount surface is positioned closer to the display plate than an end face of the light block body, the end face being adjacent to the substrate.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate having a light source surface;
a light source that is disposed to the light source surface of the substrate;
a display plate that is disposed adjacent to the light source surface of the substrate;
a light block body that surrounds the light source between the substrate and the display plate; and
a gap provided between an end face of the light block body on a substrate side and the substrate,
wherein:
the light source includes
a light source body that emits light,
a light source base material that has a mount surface, the light source body being mounted to the mount surface, and a different surface contacting with the light source surface of the substrate when the light source is mounted to the substrate, and
a mold portion that transmits the light and covers a circumference of the light source body on the mount surface of the light source base material; and

the mount surface is positioned closer to the display plate than the end face of the light block body, the end face being adjacent to the substrate.

2. The display apparatus according to claim 1 , wherein:
a thickness of the mold portion satisfies a mold thickness setting condition, which is a condition in which the light emitted from the light source body is not totally reflected at a boundary between the mold portion and air.

3. The display apparatus according to claim 2 , wherein:
the mold thickness setting condition satisfies an expression 1,
H 2>√{square root over (( n 2 −1))}× y max  (Expression 1);

the thickness of the mold portion is expressed by H 2 ,
a refractive index of the mold portion is expressed by n when a refractive index of the air is set to 1; and
a maximum value of a component parallel to the mount surface in a path of light toward the boundary between the mold portion and the air from a point light source is expressed by ymax, when the light source body is set to be a point light source.

4. The display apparatus according to claim 1 , wherein:
the light source body is provided by a light emission diode chip;
the light source is provided by a light emission diode package including the light emission diode chip; and
the light emission diode package has no reflector.

5. The display apparatus according to claim 1 , wherein:
the display apparatus is mounted to a vehicle.

6. A display apparatus comprising:
a substrate having a first surface;
a light source that is disposed to the first surface of the substrate;
a display plate that is disposed adjacent to the first surface of the substrate; and
a light block body that surrounds the light source between the substrate and the display plate,
wherein:
the light source includes
a light source body that emits light,
a light source base material that has a mount surface, the light source body being mounted to the mount surface, and
a mold portion that transmits the light and covers a circumference of the light source body on the mount surface of the light source base material, a thickness of the mold portion satisfies a mold thickness setting condition, which is a condition in which the light emitted from the light source body is not totally reflected at a boundary between the mold portion and air,
the mold thickness setting condition satisfies an expression 1,
H 2>√{square root over (( n 2 −1))}× y max  (Expression 1);

the thickness of the mold portion is expressed by H 2 ,
a refractive index of the mold portion is expressed by n when a refractive index of the air is set to 1, and
a maximum value of a component parallel to the mount surface in a path of light toward the boundary between the mold portion and the air from a point light source is expressed by ymax, when the light source body is set to be a point light source; and

the mount surface is positioned closer to the display plate than an end face of the light block body, the end face being adjacent to the substrate.

7. The display apparatus according to claim 6 , wherein:
the light source body is provided by a light emission diode chip;
the light source is provided by a light emission diode package including the light emission diode chip; and
the light emission diode package has no reflector.

8. The display apparatus according to claim 6 , wherein:
the display apparatus is mounted to a vehicle.

Assignees

• Denso Corp

Inventors

• Ito Hideki
• Kurokawa Kazumasa

Classifications

• B60K35/28

  characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver · CPC title

• B60K35/22

  Display screens · CPC title

• B60K35/29

  Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions · CPC title

• B60K35/215

  characterised by the combination of multiple visual outputs, e.g. combined instruments with analogue meters and additional displays · CPC title

• G01D11/28 Primary

  Structurally-combined illuminating devices · CPC title