# US 2009/0260965 A1 · Light-emitting module and keyboard

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- Number: US 2009/0260965 A1
- Document ID: US20090260965A1
- Status: Published application
- Kind: A1
- Application number: 12/424,152
- Filed: 2009-04-15
- Published: 2009-10-22
- Earliest claimed: 2008-04-22
- Assignees: Darfon Electronics Corp.
- Inventors: Chao-Lung CHANG
- Web page: https://patentgrep.com/patent/US20090260965A1

## CPC

- H01H 13/83: characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
- G02B 6/0021: {for housing at least a part of the light source, e.g. by forming holes or recesses}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources}
- H01H 2219/014: LED
- H01H 2219/06: Reflector
- H01H 2219/062: Light conductor
- H01H 2219/064: Optical isolation of switch sites
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A keyboard and a light-emitting module therefore are provided. The light-emitting module includes a first light source, a first light guide element, a first reflecting element and a second light source. The first light guide element has a first cavity, and the first light source is disposed in the first cavity. The first reflecting element having at least one opening is disposed under the first light guide element. The second light source is disposed under the first reflecting element, and the light emitted from the second light source passes through the opening.

## Claims

### Claim 1

A light-emitting module, comprising:
a first light source;
a first light guide element having a first cavity in which the first light source is disposed;
a first reflecting element having at least one opening, wherein the first reflecting element is disposed under the first light guide element; and
a second light source disposed under the first reflecting element, wherein light emitted from the second light source passes through the opening.

### Claim 2 (depends on 1)

The light-emitting module of claim 1, further comprising:
a second light guide element having a second cavity in which the second light source is disposed.

### Claim 3 (depends on 1)

The light-emitting module of claim 1, further comprising:
a second reflecting element under the second light source.

### Claim 4 (depends on 1)

The light-emitting module of claim 1, further comprising:
a light-shielding element above the first light guide element, wherein the light-shielding element has a predetermined pattern for reduction of light scattering.

### Claim 5 (depends on 1)

The light-emitting module of claim 1, wherein the second light source is under the opening of the first reflecting element.

### Claim 6 (depends on 1)

The light-emitting module of claim 1, wherein the first light source and the second light source emit light in different colors.

### Claim 7 (depends on 1)

The light-emitting module of claim 1, wherein the first light source and the second light source are light-emitting diode and emit light in different colors.

### Claim 8 (depends on 1)

The light-emitting module of claim 1, further comprising:
a third light source under the first reflecting element, wherein the first, second and third light sources emit light in different colors.

### Claim 9 (depends on 1)

The light-emitting module of claim 1, wherein the opening of the first reflecting element is rectangular, circular or T-shaped.

### Claim 10

A keyboard, comprising:
a key module; and
a light-emitting module under the key module, comprising:
a first light source;
a first light guide element having a first cavity in which the first light source is disposed;
a first reflecting element having at least one opening, the first reflecting element being disposed under the first light guide element; and
a second light source disposed under the first reflecting element, wherein light emitted from the second light source passes through the opening;
wherein the first light source and the second light source emit light in different colors, resulting in that the key module possesses various regions of different colors.

### Claim 11 (depends on 10)

The keyboard of claim 10, further comprising:
a second light guide element, under the first reflecting element, having a second cavity in which the second light source is disposed.

### Claim 12 (depends on 10)

The keyboard of claim 10, further comprising:
a second reflecting element under the second light source.

### Claim 13 (depends on 10)

The keyboard of claim 10, further comprising:
a light-shielding element above the first light guide element, wherein the light-shielding element has a predetermined pattern for reduction of light scattering.

### Claim 14 (depends on 10)

The keyboard of claim 10, wherein the second light source is under the opening of the first reflecting element.

### Claim 15 (depends on 10)

The keyboard of claim 10, further comprising:
a third light source under the first reflecting element, wherein the first, second and third light sources emit light in different colors.

### Claim 16 (depends on 10)

The keyboard of claim 10, wherein the first light source and the second light source are light-emitting diode.