# US 2010/0165331 A1 · Method for obtaining incident angle

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- Number: US 2010/0165331 A1
- Document ID: US20100165331A1
- Status: Published application
- Kind: A1
- Application number: 12/568,173
- Filed: 2009-09-28
- Published: 2010-07-01
- Earliest claimed: 2008-12-30
- Assignees: Arcadyan Technology Corporation
- Inventors: Sheng Chung Chen; Chin Yi Wu
- Web page: https://patentgrep.com/patent/US20100165331A1

## CPC

- H04M 1/22: Illumination; Arrangements for improving the visibility of characters on dials
- G09F 13/04: Signs, boards or panels, illuminated from behind the insignia
- H04M 1/72469: for operating the device by selecting functions from two or more displayed items, e.g. menus or icons
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS

## Abstract

A method for obtaining an incident angle θi is provided. The method is used in a panel having at least one icon, wherein the at least one icon has a plurality of protrusions, and a light-emitting source is disposed under the at least one icon. The method includes steps of obtaining a distance W between two centers of two bottoms of two trenches formed at two sides of one of the plurality of protrusions; obtaining a half of the distance W; obtaining a vertical distance H between the light-emitting source and a center of the distance W; and performing an inverse trigonometric function operation for the half of the distance W over the vertical distance H so as to obtain the incident angle θi.

## Claims

### Claim 1

A method for obtaining an incident angle % used in a panel having at least one icon, wherein the at least one icon has a plurality of protrusions, and a light-emitting source is disposed under the at least one icon, comprising steps of:
obtaining a distance W between two centers of two bottoms of two trenches formed at two sides of one of the plurality of protrusions;
obtaining a half of the distance W;
obtaining a vertical distance H between the light-emitting source and a center of the distance W; and
performing an inverse trigonometric function operation for the half of the distance W over the vertical distance H so as to obtain the incident angle θi.

### Claim 2 (depends on 1)

A method as claimed in claim 1, wherein the at least one icon is one selected from a group consisting of a numeral, a character, a symbol and a combination thereof.

### Claim 3 (depends on 1)

A method as claimed in claim 1, wherein the light-emitting source is a light-emitting diode.

### Claim 4 (depends on 1)

A method as claimed in claim 1, wherein the distance W is a horizontal distance.

### Claim 5 (depends on 4)

A method as claimed in claim 4, wherein the distance W is ranged from 6 mm to 12 mm.

### Claim 6 (depends on 1)

A method as claimed in claim 1, wherein the vertical distance H is ranged from 5 mm to 10 mm.

### Claim 7 (depends on 1)

A method as claimed in claim 1, wherein when an arctangent function is used in the inverse trigonometric function operation, θi=Tan−1(W/2)/H.

### Claim 8 (depends on 1)

A method as claimed in claim 1, wherein the step of performing the inverse trigonometric function operation is performed by using an electronic operational device.

### Claim 9 (depends on 1)

A method as claimed in claim 1, wherein the incident angle θi is ranged from 30 degrees to 45 degrees.

### Claim 10

A method for obtaining an incident angle θi used in a panel having at least one icon, wherein the at least one icon has a plurality of protrusions, and a light-emitting source is disposed under the at least one icon, comprising steps of:
obtaining a distance W between two centers of two bottoms of two trenches formed at two sides of one of the plurality of protrusions;
obtaining a half of the distance W;
obtaining a vertical distance H between the light-emitting source and a center of the distance W; and
calculating the incident angle θi based on the half of the distance W and the vertical distance H.

### Claim 11 (depends on 10)

A method as claimed in claim 10, wherein the at least one icon is one selected from a group consisting of a numeral, a character, a symbol and a combination thereof.

### Claim 12 (depends on 10)

A method as claimed in claim 10, wherein the light-emitting source is a light-emitting diode.

### Claim 13 (depends on 10)

A method as claimed in claim 10, wherein the distance W is ranged from 6 mm to 12 mm.

### Claim 14 (depends on 10)

A method as claimed in claim 10, wherein the vertical distance H is ranged from 5 mm to 10 mm.

### Claim 15 (depends on 10)

A method as claimed in claim 10, wherein the step of calculating the incident angle θi is performed by using an electronic operational device.

### Claim 16 (depends on 1)

A method as claimed in claim 1, wherein the incident angle θi is ranged from 30 degrees to 45 degrees.