INPUT DEVICE WITH LUMINOUS PATTERNS

• US 20120307521A1
• Filed: 09/23/2011
• Published: 12/06/2012
• Est. Priority Date: 06/03/2011
• Status: Active Grant

• Current Assignee: Primax Electronics Limited
• Original Assignee: Primax Electronics Limited
• Inventors: Chen, Chung-Yuan
• Granted Patent: US 8,827,529 B2
• Time in Patent Office: Days
• US Class Current: 362/606
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components

Abstract

The present invention discloses an input device with luminous patterns including an input interface and a backlight module. The backlight module includes a light source and a light guide plate. The input interface has a predetermined light shading rate and at least one pattern formed on the light guide plate. When the light source is turned off, the light passing through the light guide plate is too weak to show the pattern. When the light source is turned on, the luminous pattern is shown. One base plate of the input interface is made from a mixture of transparent plastic particles and light shading particles, and the at least one pattern is formed of the micro light guide structures. The present invention provides the advantages of increasing the light source utilization rate, reducing costs, simplifying the manufacture process, improving the shading uniformity, reducing the thickness of input device and decreasing abrasion.

Claims

1. An input device with luminous patterns, comprising:

an input interface, having a predetermined light shading rate; and

a backlight module, disposed under the input interface, wherein the backlight module comprises;

a light source; and

a light guide plate, having at least a pattern, and the at least a pattern disposed on an upper surface or a lower surface of the light guide plate, wherein when the light source is turned off, the at least a pattern is unable to be shown due to a brightness of the light guide plate is lower than the predetermined light shading rate.

2. The input device with luminous patterns as claimed in claim 1, wherein the input interface comprises at least a substrate, and the at least a substrate is doped with a plurality of light shading particles, and thus the input interface has the predetermined light shading rate, and the predetermined light shading rate is ranged between 75% and 80%.

3. The input device with luminous patterns as claimed in claim 2, wherein the at least a substrate is a glass plate or a plastic plate.

4. The input device with luminous patterns as claimed in claim 3, wherein the input interface is a light transmissive resistive touch sensor.

5. The input device with luminous patterns as claimed in claim 2, wherein the input interface further comprises a protective layer disposed over the at least a substrate, and the protective layer is doped with a plurality of light shading particles, and thus the input interface has the predetermined light shading rate, and the predetermined light shading rate is ranged between 75% and 80%.

6. The input device with luminous patterns as claimed in claim 5, wherein the protective layer is a glass plate or a plastic plate.

7. The input device with luminous patterns as claimed in claim 6, wherein the input interface is a light transmissive surface capacitive touch sensor, a light transmissive inner capacitive touch sensor or a light transmissive projected capacitive touch sensor.

8. The input device with luminous patterns as claimed in claim 1, wherein the at least a pattern is formed from a plurality of micro structures of light guide arranged densely, and the plurality of micro structures of light guide are a plurality of mesh points or a plurality of micro structures arranged densely.

9. The input device with luminous patterns as claimed in claim 1, further comprising a black base plate for absorbing a light beam, wherein the black base plate is used as a black background when the backlight module is turned off, and thus the at least a pattern is unable to be shown, and the at least a pattern of the light guide plate is a button pattern, a keyboard pattern or a pattern of an interactive component.

10. An input device with luminous patterns, comprising:

an input interface;

a backlight module, comprising;

a light source; and

a light guide plate, having at least a pattern, and the at least a pattern disposed on an upper surface or a lower surface of the light guide plate; and

a protective layer, disposed over the backlight module, and the protective layer having a predetermined light shading rate, wherein when the light source is turned off, the at least a pattern is unable to be shown due to a brightness of the light guide plate is lower than the predetermined light shading rate.

11. The input device with luminous patterns as claimed in claim 10, wherein the protective layer is doped with a plurality of light shading particles, and thus the input interface has the predetermined light shading rate, and the predetermined light shading rate is ranged between 75% and 80%.

12. The input device with luminous patterns as claimed in claim 11, wherein the protective layer is a glass plate or a plastic plate.

13. The input device with luminous patterns as claimed in claim 10, wherein the input interface is disposed under the backlight module, and the input interface is an opaque printed circuit board capacitive touch sensor.

14. The input device with luminous patterns as claimed in claim 10, further comprising a black printing ink layer disposed on an upper surface of the input interface for absorbing a light beam, wherein the black printing ink layer is used as a black background when the backlight module is turned off, and thus the at least a pattern is unable to be shown, and the at least a pattern is a button pattern, a keyboard pattern or a pattern of an interactive component.