Remote controller

A technology of remote control and carrier pulse, applied in the field of remote control, can solve the problems of reduced remote control signal and poor operability of remote control, and achieve the effect of reducing power consumption

Inactive Publication Date: 2004-12-15
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] As a result, the distance that the remote control signal can cover is reduced, so that the operability of such remote control is significantly worse

Method used

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Embodiment Construction

[0028] A remote controller according to an embodiment of the present invention will be described below with reference to FIGS. 5-7. In FIG. 5, the same elements and components as those in FIG. 2 are denoted by the same reference numerals.

[0029] In the embodiment shown in Fig. 5, the keying signal that produces when the suitable key on the keyboard of user operation keying device 1 such as power key, number key and volume control key is provided to be made up of single-chip microcomputer The switching signal generating circuit 10. The switching signal generating circuit 10 generates a switching signal by modulating a carrier pulse having a frequency of, for example, 40 kHz in response to a remote control key signal in a predetermined manner.

[0030] In the illustrated embodiment, the key control device 1 includes a power consumption mode switching key for switching between the normal power consumption mode and the low power consumption mode, although not shown in the figur...

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Abstract

A remote commander in which a switching element connected in series to an infrared light-emitting diode is turned on and off in response to carrier pulses to energize the infrared light-emitting diode to generate an infrared remote control signal includes varying means for varying duty ratios of carrier pulses.

Description

[0001] This application is a divisional application of the Chinese patent application No. 01137828.X with the filing date of November 8, 2001, and the title of the invention being "remote control". Technical field: [0002] The present invention relates to remote controls for controlling audio-visual devices such as television receivers and video tape recorders from a distance by using infrared light emitting diodes. technical background: [0003] Previously, remote controllers for controlling audio-video devices such as television receivers (TV) and video cassette recorders (VCR) from a distance by using infrared light emitting diodes have been proposed. Figure 1 shows the appearance of this remote control. [0004] FIG. 2 is a schematic diagram showing the circuit configuration of this related art remote controller. As shown in FIG. 1 , a key control device 1 is provided, which includes a keyboard on which various keys are provided, such as a power key, number keys and vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H03J1/00H03J9/06H03K17/78H04B10/40H04B10/50H04B10/524H04B10/54H04B10/60H04Q9/00
CPCH03J9/06H03J1/0025H04N21/47
Inventor 会田雅纪木原雅之
Owner SONY CORP
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