Calculator with a color changing display

• US 20050248552A1
• Filed: 05/10/2004
• Published: 11/10/2005
• Est. Priority Date: 05/10/2004
• Status: Abandoned Application

• Current Assignee: Joyce Yu
• Original Assignee: Joyce Yu
• Inventors: Yu, Joyce
• Application Number:
  US10/841,451
• Publication Number:
  US 20050248552A1
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources

Abstract

A calculator with a color changing display, comprising mainly a keyboard, a CPU which is connected with said keyboard, an oscillator which is connected with said CPU, a LCD, a LED driver and a set of LED; by pressing the different key on the keyboard, the CPU would be driven to operate different calculations, and the CPU would receive the signal transmitted from the oscillator, then said LED would be driven to randomly display light of different colors.

Claims

1. A calculator with a color changing display, comprising mainly:

a keyboard having a plurality of keys,

a numbers displayer for showing the result of calculation, and

a micro control central processing unit;

characterized in that;

said micro control central processing unit further connects to an oscillating circuit and a driving circuit of light emitting diode, such that the calculator would display different colors of light in operation.

2. A calculator with a color changing display as claimed in claim 1, wherein said micro control central processing unit is a storage memory with operation ability.

3. A calculator with a color changing display as claimed in claim 1, wherein said keys comprise a reset key, a power switch, a switch for controlling on/off of light emitting diode and a plurality of keys with specified functions;

said functional keys are divided into a plurality of groups and are led to a bus line, so as to connect with the micro control CPU.

4. A calculator with a color changing display as claimed in claim 1, wherein the numbers displayer is a liquid crystal display.

5. A calculator with a color changing display as claimed in claim 1, wherein said oscillating circuit comprises an oscillator and a plurality of capacitors connected in parallel, the output of oscillating circuit is also connected to micro control CPU.

6. A calculator with a color changing display as claimed in claim 1, wherein the light emitting diode comprises a plurality of light emitting diode bubbles of blue light, green light and red light;

the LED driving circuit is constructed mainly by driving transistors of different light emitting diodes.