| 摘要 |
PROBLEM TO BE SOLVED: To improve power efficiency between infrared ray communication terminals considerably by conducting 2-way communication with a required minimum light emitting intensity without losing communication quality so as to remarkably reduce the power consumption of the infrared ray communication terminals even when the light emission intensity and the reception sensitivity of respective modules differ from each other largely. SOLUTION: The terminal is provided with a light emitting element 22 that emits an infrared ray IR, a light receiving element 23 that receives the infrared ray IR, a driver circuit 20 that adjusts the light emission intensity of the light emitting element 22, and a CPU 13 that calculates a reception error rate from the infrared ray IR received by the light receiving element 23. The driver circuit 20 adjusts the light emission intensity of the light emitting element 22 based on a signal in response to the reception error rate from a communication opposite party outputted from a switch control circuit 24. |
