Portable electronic apparatus with controlled light sources

• US 7,245,228 B2
• Filed: 05/27/2004
• Issued: 07/17/2007
• Est. Priority Date: 05/27/2004
• Status: Expired due to Fees

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Johansson, Panu, Burger, Victor, Fussinger, Thomas, Kobald, Maik
• Primary Examiner(s): GOINS, DAVETTA WOODS
• Application Number:
  US10/855,848
• Publication Number:
  US 20050275559A1
• Time in Patent Office: 1,146 Days
• Field of Search: 340/815.4, 340/815.45, 340/815.49, 340/815.5, 340/815.55, 340/815.6, 340/815.65, 340/815.69, 340/693.4, 340/815.52, 362/227, 362/231, 362/800, 362/510, 362/543, 315/291, 315/292, 315/297, 315/307, 315/312, 345/210, 345/530
• US Class Current: 340/815.4
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H04M 1/0283 for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
• CPC Class Codes: H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 45/40 Details of LED load circuits
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

A portable electronic apparatus has light sources that can be controlled to produce decorative or informational effects. Each light source is controlled by the combination of an enable signal from a 1-bit port of a controller and a PWM signal from a PWM signal from the controller. Each PWM signal is used to control a plurality of light sources in parallel whereas each 1-bit enabled signal controls, generally, only one. The light sources are preferably arranged to shine through soft structures on the apparatus.

Claims

1. A portable electronic apparatus comprising:

a group of light sources; and

a programmable controller device having,

a plurality of 1-bit outputs each connected for enabling a respective individual light source in the group of light sources, and

a pulse width modulated signal (PWM) output for controlling an intensity of said group of light sources;

wherein each individual light source is controlled by said plurality of 1-bit outputs and said PWM output.

2. An apparatus according to claim 1, wherein each light source is controlled by a respective one of said 1-bit outputs.

3. An apparatus according to claim 1, including a plurality of bipolar transistors, connected to receive signals from respective 1-bit outputs of the controller device at their bases, wherein each light source is controlled by one of said transistors.

4. An apparatus according to claim 3, including an insulated-gate FET, connected to receive a signal from the PWM output of the controller, wherein the emitters of said transistors are connected to the drain of the FET via respective emitter resistors.

5. An apparatus according to claim 1, wherein the light sources are controlled individually by respective first switching means, connected to be controlled from said 1-bit outputs, and collectively by second switching means, connected to the controlled from said PWM signal output, wherein the second switching means is connected in series with all of said first switching means.

6. A personal communications apparatus comprising:

a group of light sources; and

a programmable controller device having,

a plurality of 1-bit outputs each connected to a respective individual light source in the group of light sources for control thereof, and

a pulse width modulated signal (PWM) output for controlling an intensity of said group of light sources;

wherein each individual light source is controlled by said plurality of 1-bit outputs and said PWM output.

7. An apparatus according to claim 6, wherein each light source is controlled by a respective one of said 1-bit outputs.

8. An apparatus according to claim 6, including a plurality of bipolar transistors, connected to receive signals from respective 1-bit outputs of the controller device at their bases, wherein each light source is controlled by one of said transistors.

9. An apparatus according to claim 8, including an insulated-gate FET, connected to receive signals from the PWM output of the controller, wherein the emitters of said transistors are connected to the drain of the FET via respective emitter resistors.

10. An apparatus according to claim 6, wherein the light sources are controlled individually by respective first switching means, connected to be controlled from said 1-bit outputs, and collectively by second switching means, connected to the controlled from said PWM signal output, wherein the second switching means is connected in series with all of said first switching means.

11. A portable electronic apparatus comprising:

a plurality of groups of light sources; and

a programmable controller device having,

a plurality of 1-bit outputs each connected for enabling a respective individual one of the light sources in the groups of light sources, and

a plurality of pulse width modulated signal (PWM) outputs for controlling respective intensities of each of said groups of light sources;

wherein each light source is controlled by one of said 1-bit outputs and one of said PWM outputs.

12. An apparatus according to claim 11, wherein each light source is controlled by a respective one of said 1-bit outputs.

13. An apparatus according to claim 11, including a plurality of bipolar transistors, connected to receive signals from respective 1-bit outputs of the controller device at their bases, wherein each light source is controlled by one of said transistors.

14. An apparatus according to claim 13, including a plurality of insulated-gate FETs, connected to receive signals from one of said PWM outputs of the controller, wherein the emitters of said transistors are connected to the drain of at least one of the FETs via respective emitter resistors according to the groups to which the light sources, controlled by the transistors, belong.

15. An apparatus according to claim 11, wherein the light sources are controlled individually by respective first switching means, connected to be controlled from said 1-bit outputs, and groupwise by second switching means, connected to the controlled from said PWM signal outputs, wherein each second switching means is connected in series with all of said first switching means associated with the same group of light sources.

16. A portable electronic apparatus comprising:

a plurality of groups of light sources, each group having a plurality of individual light sources; and

a programmable controller device having,

a plurality of 1-bit outputs each connected for controlling a respective individual light source in the plurality of groups of light sources, and

a plurality of pulse width modulated signal (PWM) outputs for controlling an output intensity of respective ones of said groups of light sources;

wherein each light source is controlled by one of said 1-bit outputs and one of said PWM outputs.

17. An apparatus according to claim 16, wherein each light source is controlled by a respective one of said 1-bit outputs.

18. An apparatus according to claim 16, including a plurality of bipolar transistors, connected to receive signals from respective 1-bit outputs of the controller device at their bases, wherein each light source is controlled by one of said transistors.

19. An apparatus according to claim 18, including a plurality of insulated-gate FETs, connected to receive signals from one of said PWM outputs of the controller, wherein the emitters of said transistors are connected to the drain of at least one of the FETs via respective emitter resistors according to the groups to which the light sources, controlled by the transistors, belong.

20. An apparatus according to claim 16, wherein the light sources are controlled individually by respective first switching means, connected to be controlled from said 1-bit outputs, and groupwise by second switching means, connected to the controlled from said PWM signal outputs, wherein each second switching means is connected in series with all of said first switching means associated with the same group of light sources.

21. A portable electronic apparatus comprising a body and a soft structure on the body, wherein the soft structure is visible light transmissive and a group of light sources are mounted to the body so as to shine light through said soft structure, the apparatus further including:

a programmable controller device having,

a plurality of 1-bit outputs each connected and configured for controlling a respective individual light source in the group of light sources, and

a pulse width modulated signal (PWM) output configured for controlling an intensity of the group of light sources;

wherein each light source is controlled by the 1-bit outputs and the PWM output.

22. An apparatus according to claim 21, wherein each light source comprises at least one LED.

23. An apparatus according to claim 21, including a plurality of soft structures on the body, wherein each soft structure is visible light transmissive and the group of light sources is mounted to the body to shine light through said structures.

24. An apparatus according to claim 23, including:

a plurality of groups of light sources mounted to the body for shining light through said structures,

wherein the programmable controller device includes a further plurality of 1-bit outputs, each 1-bit output of the controller being connected and configured for controlling a respective individual light source in one of the plurality of groups of light sources, and a plurality of pulse width modulated signal outputs for controlling respective ones of the groups of light sources, and

wherein each light source is controlled by one of the 1-bit outputs and one of the PWM outputs.

25. An apparatus according to claim 21, wherein the apparatus is a personal communication device.

26. An apparatus according to claim 24, wherein the apparatus is a personal communication device.