Method for driving backlight parts in a mobile phone

• US 6,667,731 B2
• Filed: 04/10/2001
• Issued: 12/23/2003
• Est. Priority Date: 08/19/2000
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Jae-Sun
• Primary Examiner(s): Mengistu, Amare
• Application Number:
  US09/829,635
• Publication Number:
  US 20020021276A1
• Time in Patent Office: 987 Days
• Field of Search: 345/102, 345/211, 455/566, 455/575, 455/572, 455/575.3, 455/343.5, 455/158.4, 455/159.1, 455/550
• US Class Current: 345/102
• CPC Class Codes: H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials
• 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

There is provided a control method for driving backlight parts to provide backlight to a display and a keypad in a mobile terminal. The display backlight part and the keypad backlight part are controlled to be selectively driven, according to the state of the cover and the presence or absence of key input data. Therefore, power dissipation caused by unnecessary operation of the backlights can be prevented.

Claims

1. A control method for driving backlight parts in a mobile phone, the method comprising:

providing a mobile phone having a display backlight part for providing backlight to a display, a keypad backlight part for providing backlight to a keypad, and a cover monitor for monitoring the state of a cover;

determining whether the cover is opened or closed;

determining whether key input data has been received from the keypad; and

selectively controlling the state of the display backlight part and the state of the keypad backlight part that are selectively and independently driven, according to whether the state of the cover is determined to be opened or closed and the presence or absence of key input data, by;

turning ON both the display backlight part and the keypad backlight part when the cover is open; and

turning ON only the display backlight part when key input data is received from the keypad while the cover is closed.

2. The control method of claim 1, wherein selectively controlling the display backlight part and the keypad backlight part, further comprises turning OFF a backlight part that was turned ON if a predetermined time elapses.

3. The control method of claim 1 wherein the cover is a folder cover.

4. The control method of claim 1 wherein the cover is a flip-type cover.

5. A control method for driving backlight parts in a dual folder-type mobile phone, the method comprising:

providing a mobile phone having a first display back light part for providing backlight to a first display installed on the outer surface of a folder cover, a second display back light part for providing backlight to a second display installed to be covered when the folder cover is closed, a keypad backlight part for providing backlight to a keypad, and a cover monitor for monitoring the state of the folder cover;

determining whether the cover is opened or closed;

determining whether key input data has been received from the keypad;

selectively controlling the state of the first and second display backlight parts and the keypad backlight part, according to whether the state of the cover is determined to be opened or closed and the presence or absence of key input data, by;

turning ON both the second display backlight part and the keypad backlight part when the cover is open; and

turning ON only the first display backlight part when key input data is received from the keypad while the cover is closed; and

independently driving the first and second display backlight parts and the keypad backlight part.

6. The control method of claim 5, wherein selectively controlling the first and second display backlight parts and the keypad backlight part, further comprises turning OFF a backlight part that was turned ON if a predetermined time elapses.