JP2001077763A - Data transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a device for fixing the transmission range of data by infrared ray without regard to the variation of infrared intensity from outside by controlling the light emitting level of the infrared ray so as to vary in accordance with a detected surrounding infrared intensity. SOLUTION: The light emitting level of infrared ray is controlled so as to vary in accordance with a detected surrounding infrared intensity. In this transmitter, an optical sensor part 2 detects the infrared intensity surrounding a data transmitter 1 to output a detection signal to a control part 5. The part 5 stores the detection signal of the part 2 by each fixed time concerning the surrounding infrared intensity to a memory, calculates an average where the stored value is changed, and sends an instruction signal corresponding to the calculated average to a transmission part 6. The part 6 outputs the inputted instruction signal and data to an infrared light emitting LED 11 under the control of the part 5. The LED 11 emits infrared ray corresponding to data inputted from the part 6 at a light emitting level based on the instruction signal inputted from the part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmitting apparatus for transmitting data by emitting infrared rays.

[0002]

2. Description of the Related Art FIG. 3 is a schematic diagram showing an example of use of a conventional data transmission device. The room 12 includes a ceiling 13 and a light 14 above. The room 12 has a window 15 on a side surface. The illumination 14 is a light emission illumination such as a fluorescent lamp, and is turned on / off by a switch (not shown). From window 15
External light such as sunlight enters the room 12. Data transmission device 100
Has an infrared-emitting LED 11 and a setting unit 3 on the surface, and is fixed to a ceiling 13. Also, the data transmission device 100
Includes a storage unit, a control unit, a transmission unit, and a power supply unit (not shown).

[0003] The infrared light emitting LED 11 emits infrared light in response to a data signal from a transmitting unit described later. The setting unit 3 includes a changeover switch, and outputs a setting signal set by an operation from the front to the control unit. Setting unit 3
Outputs to the control unit a setting signal for switching on and off the emission of infrared light by an operation from the surface. The storage unit is R
It consists of a storage medium such as an OM (Read Only Memory), and stores in advance a data signal to be transmitted by emitting infrared light.

[0004] The control unit reads a data signal stored in the storage unit in accordance with a setting signal from the setting unit 3 and controls to output the data signal to the transmission unit. In addition, the control unit controls to turn on / off the emission of the infrared ray by the setting signal for switching on / off of the emission of the infrared ray from the setting unit 3.
The transmission unit outputs the data signal input from the storage unit to the infrared light emitting LED 11. The power supply unit includes a storage battery such as a dry battery or a lithium battery, and supplies power to the storage unit, the control unit, and the transmission unit.

Therefore, the data transmitting apparatus 100 always emits infrared rays according to the data to be transmitted by turning on the setting unit 3.

[0006] The receiving device 9 is held by a receiving device user 10 inside the room 12. The receiving device 9 includes an infrared light receiving unit 901 and a speaker 902 on the surface, and includes a reproducing unit and a power supply unit (not shown) inside. Upon receiving the infrared light emitted from the data transmitting device 100, the infrared light receiving unit 901 converts the data transmitted by the infrared light into a digital signal and sends the digital signal to the reproducing unit. The speaker 902 outputs a signal from a playback unit, which will be described later, to the outside as voice or musical sound. The reproducing unit includes a storage medium such as a ROM in which audio signals or musical sound signals are stored in advance. The playback unit selects a voice signal or a tone signal stored in the storage medium based on the digital signal from the infrared light receiving unit 901 and outputs the selected voice signal or tone signal to the speaker 902.
The receiving device user 10 holding the receiving device 9 can hear the sound or the musical sound output from the speaker.

As described above, the data transmitting apparatus 100 can transmit data to the receiving apparatus 9 by emitting infrared rays.

In the data transmission apparatus 100, when the emission level of the infrared light is constant, if the intensity of the external light entering through the illumination 14 and the window 15 is high, the light becomes noise and the reach of the infrared light is short. Nari, lighting 14 and window 1
When the infrared light intensity of the external light entering from the line 5 is weak, the reach of the infrared light increases.

In the case where a plurality of data transmitting devices are installed in the room 12 and a target receiving device receives data near a place where each data transmitting device is installed, the lighting 1 is used.
Since the range of the infrared ray varies depending on the intensity of light from the outside such as the window 4 and the window 15, the target receiving apparatus cannot receive the data transmitted from the data transmitting apparatus,
There is a risk that a receiving device other than the destination receives data using a plurality of infrared rays, causing interference.

When the viewing time ends in a museum or the like and the use of the data transmission device 100 is stopped, it is necessary to turn off the setting unit 3 and stop the emission of infrared rays. When many data transmission devices are used, such as in a museum, stopping the infrared emission of all the data transmission devices has been a daunting task.

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a data transmitting apparatus which keeps a transmission range of data by infrared rays irrespective of a change in the intensity of infrared rays from the outside.

It is another object of the present invention to provide a data transmission device that stops emitting infrared rays when a viewing time ends in a museum or the like.

[0013]

According to a first aspect of the present invention, there is provided a data transmitting apparatus for transmitting data by emitting infrared rays, wherein an external light detecting means for detecting an infrared intensity around the data transmitting apparatus. Means, storage means for storing data to be transmitted, infrared transmission means for transmitting the data stored in the storage means by infrared light, and an infrared light emission level corresponding to the ambient infrared intensity detected by the external light detection means. And control means for controlling the change.

According to a second aspect of the present invention, there is provided a data transmitting apparatus for transmitting data by emitting infrared rays, comprising: an external light detecting means for detecting the intensity of infrared rays around the data transmitting apparatus; Storage means for storing the data, the infrared transmission means for transmitting the data stored in the storage means by infrared, and when the infrared intensity of the surroundings detected by the external light detection means is less than or equal to a predetermined value. Control means for controlling to stop.

According to a third aspect of the present invention, in the data transmission apparatus according to the first or second aspect, the control means controls the light emission level of the infrared light emitted by the infrared light transmission means to the external light detection means. Is controlled in accordance with the average value of the ambient infrared intensity detected for each predetermined time.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. Note that the same components as those shown in the related art are denoted by the same reference numerals and description thereof is omitted.

FIG. 1 is a block diagram showing a data transmitting apparatus according to one embodiment of the present invention. The data transmission device 1
It includes an optical sensor unit 2, a setting unit 3, a storage unit 4, a control unit 5, a transmission unit 6, a power supply unit 7, and an infrared light emitting LED 11.

The optical sensor unit 2 detects the intensity of infrared rays around the data transmission device 1 and outputs a detection signal to the control unit 5. The setting unit 3 includes a changeover switch, and outputs a setting signal for switching on / off of infrared rays by an external operation to the control unit 5 described later. In addition, the setting unit 3 sets in advance the value of the surrounding infrared intensity at which emission of infrared light is stopped by an external operation, and outputs the set value to the control unit 5. The storage unit 4 is formed of a storage medium such as a ROM, and data to be transmitted is stored in advance.

The control unit 5 controls the data stored in the storage unit 4 to be output to the transmission unit 6. Further, the control unit 5 stores, in a memory, the value of the infrared intensity every predetermined time, for example, every three minutes, from the detection signal of the optical sensor unit 2 for the surrounding infrared intensity, and moves the stored infrared intensity value. The average value is calculated by the arithmetic processing system, and an instruction signal corresponding to the calculated average value is sent to the transmitting unit 6.

The transmitting section 6 outputs the input instruction signal and data to the infrared LED 11 under the control of the control section 5. The infrared light emitting LED 11 emits infrared light at a light emission level based on the instruction signal input from the transmission unit 6 according to the data input from the transmission unit 6.

The power supply unit 7 includes a dry battery or a lithium battery, and supplies power to the optical sensor unit 2, the storage unit 4, the control unit 5, and the transmission unit 6.

FIG. 2 is a connection diagram showing a circuit that emits infrared light by the infrared light emitting LED 11 of the data transmission device 1 of the present embodiment. In FIG. 2, R1 to R6 indicate resistors, and Tr1 to Tr3 indicate transistors. S1 to S3
Denotes a terminal for inputting a current according to an instruction signal from the control unit 5. Tr1 to Tr3 are turned on and off by the current input to S1 to S3.

Referring to FIG. 1, a case in which the average value of the ambient infrared intensity measured at regular intervals is high will be described. The optical sensor unit 2 outputs a detection signal obtained by detecting the infrared intensity to the control unit 5. The control unit 5 determines from the detection signal from the optical sensor unit 2 that the average value of the ambient infrared intensity measured at regular intervals is high, and outputs a current to S1, S2, and S3 shown in FIG. Tr1, Tr2 and Tr3 are turned on by the current input to S1, S2 and S3. At this time, the resistance values of R1 to R6 decrease, and a large amount of current flows through the infrared light emitting LED 11. Therefore, the infrared light emitting LED 11 emits a strong level of infrared light.

Referring to FIG. 1, a description will be given of a case where the average value of the ambient infrared intensity measured at regular intervals is low. The optical sensor unit 2 outputs a detection signal obtained by detecting the infrared intensity to the control unit 5. The control unit 5 determines from the detection signal from the optical sensor unit 2 that the average value of the ambient infrared intensity measured at regular intervals is low, and outputs a current only to S1 among S1 to S3 shown in FIG. , S1 turns on Tr1, and Tr2 and Tr3 turn off. At this time, R1
The resistance value of R6 increases, and a small current flows through the infrared light emitting LED 11. Therefore, the infrared light emitting LED 1
1 emits a weak level of infrared light.

In FIG. 1, when the average value of the ambient infrared intensity measured at regular intervals falls below the value predetermined by the setting unit 3, the control unit 5 does not output a current to S1 shown in FIG. Tr1 is turned off. When Tr1 is turned off, no current flows to the infrared light emitting LED 11, and the infrared light emitting LED 11 stops emitting infrared light.

As described above, the data transmitting apparatus 1 detects the intensity of the infrared light in the surroundings by the optical sensor unit 2 and
By calculating the average value of the infrared light intensity for each fixed time, and outputting the average value of the infrared light intensity to the transmitting unit 6 as an instruction signal for instructing the infrared light emission level, the infrared light emission level according to the infrared light intensity around the data transmission device 1 is calculated. Adjust.

When it is detected that the infrared intensity around the data transmission device 1 has become equal to or less than a predetermined value, the control unit 5 instructs the infrared light emitting LED 11 to stop emitting infrared light.

According to the present embodiment, the light emission level of the infrared light emitted by the data transmission device 1 is changed according to the intensity of the infrared light around the data transmission device 1 measured at regular intervals. It is possible to prevent a change in the reach of infrared rays due to a change in the intensity of ambient infrared rays.

Further, according to the present embodiment, when the intensity of infrared rays around the data transmission device 1 becomes equal to or less than a predetermined value, emission of infrared rays can be stopped. Therefore, a threshold value for stopping the infrared emission of the data transmitting apparatus 1 is determined in advance based on the amount of external light entering from the window at night and the amount of illumination light. Is stored by the control unit 5 with the input from the
At night when the data transmission device 1 is not used, the illumination 14
By turning off the light, it is possible to automatically stop the infrared emission of the data transmission device 1. This is effective to prevent the user from forgetting to stop emitting the infrared light of the data transmission device 1 at night when the data transmission device is not used or when the lighting is turned off after the viewing time ends in a museum or the like.

The data transmission apparatus 1 of the present embodiment has a configuration in which the intensity of the infrared light emitted by the infrared light emitting LED 11 changes in three stages. Tr1 to Tr3, R3 shown in FIG.
By increasing the number of 1 to R6 and S1 to S3,
The intensity of the infrared light emitted by the infrared light emitting LED 11 can be changed in more stages.

The data transmitting apparatus of this embodiment changes the intensity of the emitted infrared light according to the average value of the intensity of the surrounding infrared light measured at regular intervals, but in an environment where the intensity of the surrounding infrared light does not change suddenly. When used, the amount of infrared light that is emitted may be changed based on the intensity of ambient infrared light that is currently being measured, without using the average value for each fixed time.

[0032]

According to the present invention, it is possible to provide a data transmitting apparatus that makes the transmission range of infrared data constant irrespective of a change in the intensity of infrared light from the outside.

Further, the present invention can provide a data transmission device that stops emitting infrared rays when the viewing time in a museum or the like ends.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a data transmitting apparatus according to an embodiment of the present invention.

FIG. 2 is an infrared light emission LE of the data transmission device 1 according to the embodiment.
FIG. 4 is a connection diagram illustrating a circuit that emits infrared light by D11.

FIG. 3 is a schematic diagram showing an example of use of a conventional data transmission device.

[Explanation of symbols]

1 data communication device, 2 optical sensor unit, 3 setting unit,
Reference Signs List 4 storage unit, 5 control unit, 6 transmitting unit, 7 power supply unit, 9 receiving device 901 infrared receiving unit, 902 speaker, 10 receiving device user, 11 infrared emitting LED, 12 indoor, 13 ceiling, 1
4 lighting, 15 windows 100 data communication device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04B 10/22

Claims (3)

[Claims] 1. A data transmitting apparatus for transmitting data by emitting infrared rays, comprising: an external light detecting means for detecting the intensity of infrared rays around the data transmitting apparatus; a storing means for storing data to be transmitted; Infrared transmission means for transmitting the data stored in the storage means by infrared,
Control means for controlling the emission level of infrared rays to be changed in accordance with the intensity of surrounding infrared rays detected by the external light detection means. 2. A data transmitting apparatus for transmitting data by emitting infrared rays, comprising: an external light detecting means for detecting an intensity of infrared rays around the data transmitting apparatus; a storing means for storing data to be transmitted; Infrared transmission means for transmitting the data stored in the storage means by infrared,
A data transmission device, comprising: a control unit that controls to stop when an ambient infrared intensity detected by the external light detection unit as detecting infrared light emission becomes equal to or less than a predetermined value. 3. The data transmitting apparatus according to claim 1, wherein said control means controls the light emission level of the infrared light emitted by said infrared light transmitting means at a predetermined time interval detected by said external light detecting means. A data transmission device for controlling the data transmission according to the average value of the infrared intensity of the data.