User interface with guide lights

• US 6,310,609 B1
• Filed: 04/17/1997
• Issued: 10/30/2001
• Est. Priority Date: 04/17/1997
• Status: Expired due to Fees

• Current Assignee: Nokia Mobile Phones UK Limited (Nokia Corporation)
• Original Assignee: Nokia Mobile Phones UK Limited (Nokia Corporation)
• Inventors: Morgenthaler, Angela
• Primary Examiner(s): Shalwala, Bipin
• Assistant Examiner(s): Kovalick, Vincent E.
• Application Number:
  US08/843,953
• Time in Patent Office: 1,657 Days
• Field of Search: 345/169, 345/170, 379/368, 379/433, 341/22
• US Class Current: 345/170
• CPC Class Codes: H01H 2219/039 Selective or different modes of illumination
• CPC Class Codes: H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/72466 with selection means, e.g. keys, having functions defined by the mode or the status of the device
• CPC Class Codes: H04M 1/72469 for operating the device by selecting functions from two or more displayed items, e.g. menus or icons
• CPC Class Codes: H04M 2250/56 including a user help function
• CPC Class Codes: H04W 52/027 by controlling a display operation or backlight unit
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A user interface with guide lights for a communications device, such as a mobile telephone, is provided to assist a user in the correct and efficient operation of the device having a display, and a keypad which contains a numerical 10-key and other control keys. The user interface includes a means for identifying the appropriate keys on the keypad which correspond to the step or steps required to activate a desired operation to be performed within the device. In the preferred embodiment, identification of the appropriate keys is achieved using a light source which is mounted beneath each translucent key so that when the light source is illuminated, the key associated with that light source will be identified to the user. The intensity of the light sources is variable and may be controlled to provide sufficient contrast to read all keys in low ambient light while highlighting the keys to be pressed for operation of the desired function. In high ambient light, the intensity of the guide lights may be increased for enhanced contrast and visibility. Alternatively, different color light sources may be used, with one color to light all keys for visibility in low ambient light, if needed, and the other color to provide the guide lights.

Claims

1. A user interface for assisting a user in the operation of a telephone, said telephone having a display and a keypad having a plurality of keys, each said key corresponding to a particular operation of said telephone, said user interface comprising:

a plurality of illumination sources, wherein at least one illumination source of said plurality of illumination sources corresponds to each key of said plurality of keys to uniquely identify said key by selectively illuminating the corresponding illumination source;

a means for independently controlling activation of said plurality of illumination sources to identify one or more of said plurality of keys in order to guide said user in the proper operation of the telephone;

means for identifying when the user presses a non-illuminated key to alert the user of an error due to pressing the non-illuminated key; and

a timer, said timer being electrically connected to said data processor for providing a timing signal of a predetermined duration signaling said data processor to deactivate said illumination sources.

2. The user interface of claim 1, wherein each key is at least partially light transmissive and at least one illumination source is disposed beneath its corresponding said each key thereby illuminating said each key when said at least one illumination source is activated.

3. The user interface of claim 1, wherein said at least one illumination source is disposed adjacent each said key, thereby identifying one said key when its respective said illumination source is activated.

4. The user interface of claim 1, wherein said at least one illumination sources is disposed within said each key, thereby identifying one said key when its respective illumination source is activated.

5. The user interface of claim 1, wherein said each key has two illumination sources corresponding thereto, each of said two illumination sources emitting light of a different color.

6. The user interface of claim 1, wherein said means for controlling said illumination sources comprises a data processor.

7. The user interface of claim 1, wherein each of said plurality of illumination sources having an illumination contrast level and further comprising a light sensor for monitoring an ambient light and for providing a signal to said controlling means wherein said controlling means varies said illumination contrast level of said plurality of illumination sources responsive to the ambient light.

8. The user interface of claim 1, wherein said means for controlling said plurality of illumination sources includes a disabling means temporarily disabling said plurality of illumination sources.

9. A user interface for assisting a user in the operation of a telephone, said telephone having a display and a keypad having a plurality of keys, each key corresponding to a particular operation of said telephone, said user interface comprising:

a plurality of identifiers, wherein at least one identifier of said plurality of identifiers is associated with each key of said plurality of keys to uniquely identify said one key and wherein any one of said plurality of identifiers may be selectively activated;

a means for controlling said plurality of identifiers to identify one or more of said plurality of keys to said user to provide a guide for said user;

a means for identifying an error of pressing a non-illuminated key by the user; and

a means for alerting the user of the error.

10. The user interface of claim 9, wherein said plurality of identifiers comprises a plurality of light sources for backlighting said plurality of keys.

11. The user interface of claim 10, wherein each light source of said plurality of light sources comprises a light emitting diode.

12. The user interface of claim 10, wherein said controlling means includes means for enhancing a contrast of each light source in response to an ambient light level.

13. The user interface of claim 12, wherein said enhancing means comprises means for varying an intensity of each light source.

14. The user interface of claim 12, wherein each key has two light sources of said plurality of light sources corresponding thereto, said two light sources emitting a different color light and said means for enhancing contrast comprised means for selecting one of said two light sources.

15. A method for guiding a user in the operation of a telephone, said telephone having a display, a keypad having a plurality of keys, each key having a unique function and having a selectively activatable illumination source, said method for guiding comprising the steps of:

storing a plurality of functions in a function menu, each function of the plurality of functions having at least one keystroke on said plurality of keys associated therewith;

detecting selection of a desired function from said function menu;

selectively illuminating at least one of said illumination sources of said keys within said keypad to indicate said at least one keystroke for activating the desired function;

identifying an error of pressing a non-illuminated key by said user; and

alerting said user of the error.

16. The method of claim 15, wherein the step of selectively illuminating includes varying an illumination contrast based upon an ambient light level.

17. The method of claim 16, wherein the step of varying an illumination contrast comprises varying an intensity of light emitted by said illumination sources.

18. The method of claim 16, wherein each illumination source includes first color light source and second color light source, and the step of varying an illumination contrast comprises selecting one of said first and second color light source.

19. The method of claim 17, wherein the step of varying an illumination level includes detecting the ambient light level.

20. The method for guiding a user of claim 15, wherein the step of alerting said user comprises generating an audible signal.