1. Power-Saving Laser Pointer Mouse PATENT: 7888822 US Classification 323/299: under the class323: “Electricity: Power Supply or Regulation Systems” US Classification 307/130: under the class307: “Electrical Transmission or Interconnection Systems” REVIEWED BY: BENJAMIN FEIFKE, OPT310 REVIEWED 10/8/2014 Note: all images in this powerpoint are from the same source: Su, Chen-Nan, Hung-Ming Lin, and Yi-Guang Chen. Power-Saving Laser Pointer Mouse. Primax Electronics Ltc, Taipei (TW), assignee. Patent 7888822. 3 Sept. 2009. Print.

2. Prior Art With increasing technology interfaces with presentation methods, such as powerpoint slides, new handheld presentation device was necessary. Power-saving laser pointer mouse. Reference patents include: ◦the mouse model that is being applied ◦a method for communicating battery voltage to the applied microcontroller, and generating different output signals from it, along with the computer code that generates it. ◦Other similarly relevant technology, such as another model for the circuit structure and microcontroller and... What this patent changes: it describes a novel method for regulating the signal waveform being sent, from microcontroller, to the output led of the laser pointer.

3. A New Waveform: prior art, LED control Different output waveforms for controlling led. High frequency controlled interval exposure Waveform prior art: Good: duration T ‘unperceivable’ to human eyes Problems: ◦Left spent too much power; right caused dimming/blinking.

4. A New Waveform: power-saving led output control Three Claims 1.The method, specifically changing analog input voltage to digital output 2.Circuit for battery-microcontroller-LED system: 3.Waveforms: adjustable LED exposure intervals for different battery levels a.1.5V = new battery, different battery saving ‘modes’ b.Next page 1.5V = new battery 201: Battery 202: Microcontroller 203: LED 2021: switch signal (signal waveform)

5. 1.5V > V0 > 1.2V: exposure time equals T— always on 1.2V > V0 > 1.1V: exposure time equals.67 T 1.1V > V0 > 1.0V: exposure time equals.5 T 1.0V > V0 > 0V: exposure time equals.33 T 3.