Portable terminal equipment and method of controlling backlight display therein

A method of controlling backlight display in portable terminal equipment, in which a backlight is lit by causing light emitting elements to emit light in displaying means for displaying information, said method comprising the steps of:

• determining the width of a pulse for causing said light emitting elements to emit light;
• monitoring the amount of remaining power of a battery for said portable terminal equipment;
• when the result of said monitoring indicates that the amount of remaining electric power of said battery is higher than or equal to a predetermined level, causing said light emitting elements to emit light with a pulse having said determined width;
• and
• when the result of said monitoring indicates that the amount of remaining power of said battery is lower than the predetermined level, causing said light emitting elements to emit light with a pulse having a narrower width than said determined width.

A method of controlling backlight display in portable terminal equipment in which a backlight is lit in a desired color by causing a desired light emitting element of a plurality of light emitting elements to emit light in displaying means for displaying information, said method comprising the steps of,

• monitoring the amount of remaining power of a battery for said portable terminal equipment;
• when the result of said monitoring indicates that the amount of remaining power of said battery is higher than or equal to a predetermined level, causing said desired light emitting element to emit light;
• and
• when the result of said monitoring indicates that the amount of remaining electric power of said battery is lower than a predetermined level, causing a light emitting element operable with lower power consumption of said light emitting elements to emit light.