JP2015201452A - Led illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED illumination system capable of promoting power saving while properly lighting when needed such as when a viewer blouses.SOLUTION: An LED illumination system (XC) includes: LED units (XA1, XA2) including light sources (203A, 203B); a state recognition section (271) capable of recognizing a state of an object; a control section (272) for controlling a state of a light-source light emitted from the light sources (203A, 203B) on the basis of a state of an object recognized by the state recognition section (271); and a first wireless communication section (281) for wirelessly communicating concerning the state of the light-source light.

Description

  Of the various technical features disclosed in the present specification, the first technical feature relates to a lighting device having a light control function and a color control function, for example.

  Of the various technical features disclosed in the present specification, the second technical feature relates to an LED lighting system that illuminates a reading desk in a library, for example.

<First Background Technology>
In recent years, lighting devices (task lights, kitchen lighting, etc.) using LEDs (Light Emitting Diodes) as light sources have been put into practical use.

  As an example of the related art related to the above, Patent Document 1 can be cited.

<Second Background Technology>
FIG. 63 shows an example of a conventional illumination system (see, for example, Patent Document 2). The illumination system XX shown in the figure includes a plurality of illumination devices 291 and a camera unit 292. The plurality of lighting devices 291 are attached to a wall surface of a library, for example, and illuminate a place where the viewer Vw walks. The camera unit 292 is attached to the ceiling W and photographs the viewer Vw who walks from above. The image of the camera unit 292 is subjected to image processing by image processing control means (not shown). As a result, when it is determined that the viewer Vw is included in the image, the lighting device 291 in the vicinity thereof is turned on. When it is determined that the viewer Vw is not included in the image, the lighting device 291 is turned off. Thereby, the step of the viewer Vw who walks in the library can be appropriately illuminated.

Japanese Patent No. 3060478 JP 2010-140754 A

<Problems in the first background art>
For example, task lights that use LEDs can be made extremely thin compared to when incandescent or fluorescent lamps are used. However, due to their thinness, the operation unit (power switch) And a light control knob etc.).

  In addition, for example, kitchen lighting used around water often has to be operated with wet or dirty hands, which has problems in terms of safety and hygiene.

  Among various technical features disclosed in the present specification, the first technical feature is a lighting device capable of touchless operation in view of the above-described problems found by the applicants of the present application. The purpose is to provide.

<Problems in the second background technology>
For example, in a library, a plurality of reading desks are arranged for each viewer Vw to browse books. The browsing desk needs to be illuminated with brightness suitable for the reader Vw when browsing the book. In addition, illuminating a viewing desk on which the viewer Vw is not seated consumes power wastefully. In the lighting system XX, it is difficult to appropriately illuminate each reading desk according to the state of the browsing person Vw.

  Of the various technical features disclosed in the present specification, the second technical feature has been conceived under the circumstances described above, and is necessary when the viewer browses. It is an object of the present invention to provide an LED lighting system capable of promoting power saving while being properly lit.

<First technical features>
Among various technical features disclosed in the present specification, a lighting device according to a first technical feature includes a light source, a touchless sensor for detecting proximity and movement of an object in a non-contact manner, And a control unit that performs drive control of the light source based on the output of the touchless sensor (first-first configuration).

  In the illumination device having the above-described configuration 1-1, the control unit controls the turning on / off of the light source when the object is stationary for a predetermined time in a state of being close to the touchless sensor. The configuration to be performed (1-2 configuration) is preferable.

  Further, in the lighting device having the above-described configuration 1-1 or 1-2, the control unit is configured to move a direction when the object is moved in a predetermined direction in a state in which the object is in proximity to the touchless sensor. It is preferable to employ a configuration (first-3 configuration) for performing dimming control or toning control of the light source according to the above.

  Further, in the illumination device having the above-described configuration 1-3, the control unit increases the light amount of the light source when the object is moved in the first direction, and the object is moved in the second direction. When the object is moved in the third direction, the color temperature of the light source is increased, and when the object is moved in the fourth direction, the light source of the light source is reduced. A configuration (first to fourth configuration) for decreasing the color temperature is preferable.

  In the lighting device having the above configuration 1-4, the first direction and the second direction are opposite to each other, and the third direction and the fourth direction are opposite to each other. The first direction and the second direction, and the third direction and the fourth direction may be configured to be orthogonal to each other (first to fifth configurations).

  Further, an illumination device having any one of the first to first to first-5 configurations includes a casing including the light source and the touchless sensor, and an arm attached to the casing (first). 1-6).

  In the illumination device having the above-described configuration 1-6, the touchless sensor may be configured in the vicinity of an arm attachment portion to which the arm is attached (configuration 1-7).

  Further, in the illumination device having any one of the first to first to first-5 configurations, the light source is attached to a ceiling, and the touchless sensor is attached to a wall surface (first to eighth). (Configuration).

  Further, in the lighting device having any one of the first to first to eighth configurations, the light source may have a configuration (first to ninth configuration) having at least one LED.

  Further, in the lighting device having the above-described configuration 1-9, the LED includes a plurality of LED elements having different emission colors, and the control unit individually drives and controls the LED elements for each color ( (1-10th configuration)

  Further, in the illumination device having any one of the first to first to tenth configurations, the touchless sensor is provided at different positions and sequentially emits light; and the plurality of light emitting units. A light receiving unit that detects each reflected light that is sequentially emitted from and reflected by the object and generates a plurality of pieces of reflected light intensity information indicating the intensity of each reflected light detected by the light receiving unit. A configuration in which the control unit receives the plurality of pieces of reflected light intensity information generated by the reflected light intensity information generation unit and determines the proximity and movement of the object ( It is preferable to use the 1-11th configuration.

  Further, in the illumination device having the above-described configuration 1-11, the control unit calculates a phase difference between intensity changes occurring between the reflected lights, and moves the object based on the calculation result. It is good to make it the structure (1-12 structure) to determine.

  Further, in the illumination device having the above configuration 1-12, the plurality of reflected light intensity information includes a first reflection indicating an intensity of the first reflected light from the first light emitting unit through the object to the light receiving unit. Light intensity information, second reflected light intensity information indicating the intensity of the second reflected light from the second light emitting unit through the object to the light receiving unit, and a second reflected light intensity information from the third light emitting unit through the object to the light receiving unit. Third reflected light intensity information indicating the intensity of the three reflected light is included, and the control unit includes a phase difference of an intensity change occurring between the first reflected light and the second reflected light, Of the phase difference of the intensity change generated between the first reflected light and the third reflected light, and the phase difference of the intensity change generated between the second reflected light and the third reflected light , Obtain absolute values of each of at least two phase differences, and based on the magnitude relationship, Configured to determine the moving shaft may be in (a 1-13 Configuration).

  Further, in the lighting device having the above-described configuration 1-13, the control unit determines whether the phase difference of the phase difference determined to have a larger absolute value out of the two phase differences of which the absolute values are compared is positive or negative. The moving direction of the object on the moving axis may be determined based on (1-14 configuration).

  Further, in the illumination device having any one of the first to eleventh to eleventh to fourteenth configurations, the plurality of light emitting sections are all infrared LEDs that emit infrared light (first to fifteenth configurations). ).

  Further, in the illumination device having any one of the first to eleventh to eleventh first to fifteenth configurations, the plurality of light emitting units are provided at respective vertex positions of a regular polygon. It is preferable to adopt a configuration (first to sixteenth configurations) provided at the center of gravity of the square.

  In the illumination device having the above 1-16th configuration, the regular polygon may be a regular triangle (1-17th configuration).

<Second technical feature>
In addition, among various technical features disclosed in the present specification, an LED illumination system according to a second technical feature includes an LED illumination device including a plurality of LED chips, and imaging for capturing a specific imaging area. And a face recognition function for recognizing whether the image of the photographing means includes a face in a specific state, and when the image is included from a state in which the face in the specific state is not included in the image It has a dimming function to increase the light amount of the LED lighting device and reduce the light amount of the LED lighting device when the image is not included from the state including the face in the specific state. It is set as the structure (2-1 structure) provided with a face recognition control means.

  In the LED lighting system having the above-described configuration 2-1, the specific state may be a configuration (a configuration 2-2) in which the face is directly facing the imaging unit.

  In the LED illumination system having the above-described configuration 2-2, the LED illumination device may be configured to illuminate a table top (configuration 2-3).

  In the LED illumination system having the above-described configuration 2-3, the photographing unit may be configured to be provided at the back of the top plate (configuration 2-4).

  In the LED illumination system having the above configuration 2-4, the specific imaging region may be configured to be a region (second configuration 5-5) that faces obliquely upward from the imaging means toward the top of the top plate.

  Further, in the LED lighting system having any one of the configurations of the 2-1 to 2-5, the LED lighting device includes one or more LED units each including a plurality of LED modules each having the LED chip. It is recommended to use (2-6 configuration).

  In the LED lighting system having the above configuration 2-6, the LED unit extends in the first direction, and extends in the first direction, with the substrate on which the plurality of LED modules are mounted. It is good to set it as the structure (2-7 structure) provided with the supporting member to which the said board | substrate was attached to the outer surface of the bottom part in the shape of a U in cross section.

  The LED lighting system having the second to seventh configurations further includes a power supply unit that supplies power to the plurality of LED modules, and the power supply unit is accommodated in the support member (first configuration). 2-8).

  Further, the LED illumination system having any one of the above-mentioned configurations 2-6 to 2-8 includes a plurality of the LED units, and any of the plurality of LED units illuminates the top plate of the desk. And the configuration in which the amount of light is controlled by the face recognition control means (2-9 configuration).

  In the LED lighting system having the above configuration 2-9, any one of the plurality of LED units illuminates the ceiling, and the amount of light is not controlled by the face recognition control means (2-10). (Configuration).

  The LED lighting system having the above configuration 2-10 extends in the first direction, and further includes a support cover that supports the plurality of LED units (configuration 2-11). Good.

<Other technical features>
For example, by combining the first technical feature and the second technical feature described above, a light source, a touchless sensor for detecting proximity and movement of an object in a non-contact manner, and a specific photographing region are photographed. It is also possible to realize an illuminating device including an imaging unit, and a control unit that performs drive control of the light source based on the results of both motion detection using the touchless sensor and face detection using the imaging unit. It is done.

  Other configurations and advantages related to the first and second technical features and other technical features will become more apparent from the detailed description given below with reference to the accompanying drawings.

  Of the various technical features disclosed in the present specification, according to the first technical feature, it is possible to provide a lighting device capable of touchless operation.

  Among various technical features disclosed in the present specification, according to a second technical feature, when the user of the LED lighting system shows the face in the specific state in the specific imaging region. Therefore, it is determined that the brightness is required, and the LED lighting device can be appropriately turned on. On the other hand, when the face in the specific state of the user does not appear in the specific photographing area, it is determined that the brightness is not required, and the user can turn off appropriately. For this reason, power saving can be promoted while realizing appropriate lighting and extinguishing.

Block diagram showing the configuration of a semiconductor device The figure which shows the communication system between MCU shown in FIG. 1 and a data register The figure which shows the structure of the data register shown in FIG. FIG. 5 is a diagram showing the configuration of the register ALS_CONTROL shown in FIG. FIG. 5 is a diagram showing the configuration of the register PS_CONTROL shown in FIG. The figure which shows the structure of register | resistor I_LED shown in FIG. The figure which shows the structure of register | resistor I_LED33 shown in FIG. FIG. 5 is a diagram showing the configuration of the register ALS_PS_MEAS shown in FIG. FIG. 5 is a diagram showing the configuration of the register PS_MEAS_RATE shown in FIG. FIG. 5 is a diagram showing the configuration of the register ALS_PS_STATUS shown in FIG. The figure which shows the structure of register | resistor PS_DATE_LED shown in FIG. The figure which shows the structure of register INTERRUPT shown in FIG. The figure which shows the structure of register | resistor PS_TH_LED shown in FIG. The figure which illustrates the data stored in register | resistor PS_DATE_LED31 shown in FIG. 1 is a time chart for explaining a PS measurement method for the semiconductor device shown in FIG. 1 is a time chart for explaining the ALS measurement method of the semiconductor device shown in FIG. Time chart for explaining the interrupt function of the semiconductor device shown in FIG. FIG. 1 is an external view of the semiconductor device illustrated in FIG. 1 is a diagram illustrating a method of using the semiconductor device illustrated in FIG. The figure which shows arrangement | positioning of the semiconductor device and infrared LED which were shown in FIG. FIG. 19 is a circuit block diagram showing the main part of the mobile phone shown in FIG. Time chart for explaining the hand gesture detection function of the mobile phone shown in FIG. Time chart for explaining threshold value determination operation of PS measurement value Flowchart for explaining monitoring operation of PS measurement value FIG. 24A is a flowchart showing a modification. Table for explaining the contents of data averaging process Time chart to explain the effect of data averaging process The flowchart which showed the detail of the motion determination process in step S107 Schematic diagram showing an example of display processing according to left and right motion Schematic diagram showing an example of display processing according to vertical motion Time chart for explaining the shift to zoom processing The flowchart which showed the detail of the zoom process in step S111 The figure which shows an example of the conversion table referred by step S303. Table for explaining another method of step S303 Schematic diagram showing an example of display processing according to perspective motion The figure which shows the modification regarding arrangement | positioning of a semiconductor device and infrared LED. The flowchart which showed the motion determination process of step S107 at the time of arrangement | positioning of FIG. The figure for demonstrating the cursor operation | movement realizable at the time of arrangement | positioning of FIG. Schematic diagram showing how the cursor moves on the display screen FIG. 32 is a schematic diagram showing an application example of a motion detection device adopting the arrangement of FIG. 32. Outline drawing of lighting equipment Lighting equipment block diagram Schematic diagram illustrating an example of touchless lighting control Schematic diagram showing an example of touchless dimming control Schematic diagram showing an example of touchless toning control Schematic diagram showing an example of application to office lighting Schematic diagram showing a variation of the sensor layout Schematic diagram showing an example of application to ceiling lighting Front view showing an example of an LED lighting system Side view showing an example of LED lighting system The principal part perspective view which shows an example of the LED lighting apparatus used for the LED lighting system shown in FIG. Sectional drawing which follows the IV-IV line of FIG. Sectional drawing which shows an example of the LED unit used for the LED lighting apparatus of FIG. The top view which shows the board | substrate and LED module of the LED unit shown in FIG. Sectional drawing which follows the VII-VII line of FIG. The top view which shows the power supply board and electronic component of the LED unit shown in FIG. The system block diagram which shows the LED lighting system of FIG. In the LED lighting system of FIG. 1, a side view showing a state in which a viewer walks and its image In the LED lighting system of FIG. 1, a side view showing a state in which a viewer is standing toward a viewing desk and an image thereof. In the LED lighting system of FIG. 1, a side view showing a state in which a viewer stands with his back to the viewing desk and an image thereof. In the LED lighting system of FIG. 1, a side view showing a state in which a viewer is sitting toward a reading desk and an image thereof. In the LED lighting system of FIG. 1, the side view and the image which show the state in which the viewer is sitting away from the reading desk In the LED lighting system of FIG. 1, a side view showing a state in which a viewer is sitting with his back to a reading desk and an image thereof The side view and the image which show a state where there is no viewer around the LED lighting system of FIG. In the LED lighting system of FIG. 1, the side view and the image which show the state by which the load was put on the top plate of the reading desk Schematic diagram showing a combination example of motion detection and face detection Side view showing an example of a conventional LED lighting system

<Configuration and operation of semiconductor device>
FIG. 1 is a block diagram illustrating a configuration of a semiconductor device. As shown in FIG. 1, the semiconductor device 1 of this configuration example includes a proximity sensor 2, an illuminance sensor 10, a data register 20, an oscillator (OSC) 21, a timing controller 22, a signal output circuit 23, a signal input / output circuit 24, a drive Terminals T1 to T3, a signal output terminal T4, a clock input terminal T5, a serial data input / output terminal T6, a power supply terminal T7, ground terminals T8 and T9, and a test terminal T10.

  The cathodes of infrared LEDs (Light Emitting Diodes) 31 to 33 are connected to the drive terminals T1 to T3, respectively. Both the anodes of the infrared LEDs 31 to 33 receive the power supply voltage VDD1. The proximity sensor 2 includes a control circuit 3, a pulse generator 4, a driver 5, an infrared light sensor 6, an amplifier 7, an A / D converter 8, and a linear / logarithmic converter 9. The control circuit 3 controls the proximity sensor 2 as a whole in accordance with the control signal stored in the data register 20.

  The pulse generator 4 generates a pulse signal for driving the infrared LEDs 31 to 33. The driver 5 maintains each of the drive terminals T1 to T3 in a high impedance state, and grounds one of the drive terminals T1 to T3 in response to the pulse signal generated by the pulse generator 4. . Which one, two, or three infrared LEDs among the infrared LEDs 31 to 33 are to be used can be selected by a signal stored in the data register 20. Further, the value of the current that flows through each selected infrared LED and the cycle for causing each selected infrared LED to emit light can be set by a signal stored in the data register 20 (FIGS. 3, 6, and 5). 7, see FIG.

  When any one of the drive terminals T1 to T3 is grounded by the driver 5, a current flows through the infrared LED corresponding to the drive terminal, and infrared light is emitted from the infrared LED. The infrared light α emitted from the infrared LED is reflected by the reflector 34 and enters the infrared light sensor 6. Infrared light from the sun also enters the infrared light sensor 6. The infrared light sensor 6 is constituted by, for example, a photodiode having a peak wavelength of 850 nm. The infrared light sensor 6 generates a photocurrent having a level corresponding to the light intensity of the incident infrared light α. This photocurrent includes a pulse component based on the infrared light α from the infrared LEDs 31 to 33 and a direct current component based on the infrared light from the sun.

  The amplifier 7 amplifies only the pulse component of the photocurrent generated by the infrared light sensor 6 and outputs an analog voltage of a level corresponding to the light intensity of the infrared light α incident on the infrared light sensor 6. The A / D converter 8 converts the analog voltage output from the amplifier 7 into a digital signal. The level of the analog voltage and the numerical value of the digital signal are in a linear relationship. The linear / logarithmic converter 9 obtains the logarithm of the numerical value of the digital signal generated by the A / D converter 8, and stores the 8-bit digital signal indicating the obtained logarithm in the data register 20 (see FIGS. 3 and 11). ).

  The illuminance sensor 10 includes a visible light sensor 11, an amplifier 12, a capacitor 13, an A / D converter 14, and a control circuit 15. Visible light β generated by the visible light source 35 around the semiconductor device 1 enters the visible light sensor 11. The visible light source 35 is a fluorescent lamp, an incandescent bulb, the sun, or the like. The visible light sensor 11 is configured by a photodiode having a peak wavelength of 550 nm, for example. The visible light sensor 11 generates a photocurrent having a level corresponding to the light intensity of the incident visible light β.

  The amplifier 12 and the capacitor 13 convert the photocurrent into an analog voltage. The A / D converter 14 converts the analog voltage into a 16-bit digital signal and supplies it to the control circuit 15. The control circuit 15 controls the entire illuminance sensor 10 according to the control signal stored in the data register 20, and stores the digital signal generated by the A / D converter 14 in the data register 20 (see FIGS. 3 and 4). ).

  The oscillator 21 generates a clock signal according to the control signal stored in the data register 20. The timing controller 22 controls the operation timing of each of the proximity sensor 2 and the illuminance sensor 10 in synchronization with the clock signal from the oscillator 21.

  The signal output terminal T4 is connected to an MCU (Micro Control Unit) 36 via a signal line, and is connected to a line of the power supply voltage VDD2 via a resistance element 37. The output circuit 23 applies the interrupt signal INT to the MCU 36 by setting the signal output terminal T4 to the ground state or the floating state in accordance with the interrupt signal INT stored in the data register 20. The interrupt signal INT is generated when the light intensity of the infrared light α incident on the infrared light sensor 6 exceeds a predetermined threshold or when the light intensity of the visible light β incident on the visible light sensor 11 falls within a predetermined range. It is activated when it exceeds. The case where the interrupt signal INT is activated can be set by a signal stored in the data register 20 (see FIGS. 3, 10, 12, and 13).

  The clock input terminal T5 is connected to the MCU 36 through a signal line, and is connected to a line of the power supply voltage VDD2 through a resistance element 39. The serial data input / output terminal T6 is connected to the MCU 36 via a signal line, and is connected to a line of the power supply voltage VDD2 via a resistance element 38. The MCU 36 applies the clock signal SCL to the data register 20 via the signal input / output circuit 24 by setting the clock input terminal T5 to the ground state or the floating state. Further, the MCU 36 applies the serial data signal SDA to the data register 20 via the signal input / output circuit 24 by setting the serial data input / output terminal T6 to the ground state or the floating state.

  The data register 20 operates in synchronization with the clock signal SCL supplied from the MCU 36, and stores the serial data signal SDA supplied from the MCU 36 at a selected address. The data register 20 operates in synchronization with the clock signal SCL supplied from the MCU 36, reads stored data from the selected address, and uses the read data as the serial data signal SDA and the signal input / output circuit 24 and the serial data input / output. The signal is supplied to the MCU 36 through the terminal T6.

The output circuit 23 transmits the interrupt signal INT output from the data register 20 to the MCU 36 via the signal output terminal T4. The output circuit 23 sets the signal output terminal T4 to a high impedance state when the interrupt signal INT output from the data register 20 is at “H” level, and the interrupt signal INT output from the data register 20 is at “L” level. In this case, the signal output terminal T4 is set to the “L” level.

  The signal input / output circuit 24 transmits the clock signal SCL given from the MCU 36 via the clock input terminal T5 to the data register 20 and also receives the serial data signal SDA given from the MCU 36 via the serial data input / output terminal T6. This is transmitted to the data register 20.

  The signal input / output circuit 24 transmits the serial data signal output from the data register 20 to the MCU 36 via the serial data input / output terminal T6. The signal input / output circuit 24 sets the serial data input / output terminal T6 to a high impedance state when the data signal output from the data register 20 is at “H” level, and the data signal output from the data register 20 is at “L” level. In this case, the serial data input / output terminal T6 is set to the “L” level. The power-on-reset (POR) circuit 25 resets the data in the data register 20 in response to the supply voltage VDD3 being turned on.

  A power supply voltage VDD3 for driving the semiconductor device 1 is applied to the power supply terminal T7. In addition, one electrode of a capacitor 40 for stabilizing the power supply voltage VDD3 is connected to the power supply terminal T7. The other electrode of the capacitor 40 is grounded. The ground terminal T8 is a terminal for allowing the currents of the LEDs 31 to 33 to flow out, and is grounded. The ground terminal T9 is a terminal for applying the ground voltage GND to the internal circuits 2 to 15 and 20 to 25 of the semiconductor device 1. The test terminal T10 is set to the “H” level in the test mode, and is grounded as shown in FIG. 1 during the normal operation.

  2A to 2D are diagrams illustrating a communication method between the MCU 36 and the data register 20. In this communication system, data can be read and written from a master to a plurality of slaves. Here, the MCU 36 is a master and the data register 20 is a slave. The slave is selected by a 7-bit slave address (0111000 in the figure). Usually, a read / write flag is added to the 7-bit slave address. The serial clock signal SCL is output from the master. The slave inputs / outputs the serial data signal SDA in synchronization with the serial clock signal SCL from the master. That is, the slave takes in the serial data signal SDA in synchronization with the serial clock signal SCL, and conversely outputs the serial data signal SDA in synchronization with the serial clock signal SCL.

  The communication of information starts with a start condition ST from the master side and ends with a stop condition SP. The start condition ST is set when the serial data signal SDA changes from the “H” level to the “L” level when the serial clock signal SCL is at the “H” level. The stop condition SP is set when the serial data signal SDA changes from the “L” level to the “H” level when the serial clock signal SCL is at the “H” level.

  The data bit is determined while the serial clock signal SCL is at “H” level. The level of the serial data signal SDA is kept constant during the period when the serial clock signal SCL is at “H” level, and is changed during the period when the serial clock signal SCL is at “L” level. The unit of data is 1 byte (8 bits), and the data is transferred in order from the upper bit. For each byte, the receiving side returns a signal ACK (0 of 1 bit) to the transmitting side. It is also possible to return a signal NACK (1 of 1 bit) after receiving 1 byte. The signal NACK is used when the master informs the slave of the end of data transfer in the data transfer from the slave to the master.

  A series of communications is always started in a start condition ST from the master. One byte immediately after the start condition ST is a 7-bit slave address and a 1-bit read / write flag. The read / write flag is set to 0 when transferring from the master to the slave, and set to 1 when transferring from the slave to the master. When the slave that has received the slave address returns a signal ACK to the master, communication between the master and the slave is established.

  When designating the address of the data register 20 as a slave, as shown in FIG. 2A, the MCU 36 as a master sets a start condition ST, transmits a 7-bit slave address, and reads / writes. After the flag is set to 0, a 1-byte register address (100XXXX in the figure) is transmitted in response to the signal ACK from the slave, and a stop condition SP is transmitted in response to the signal ACK from the slave. Note that X in the figure is 0 or 1.

  When writing data by designating the address of the slave data register 20, as shown in FIG. 2 (b), the master MCU 36 sets a start condition ST and transmits a 7-bit slave address. After setting the read / write flag to 0, 1 byte register address (100XXXX in the figure) is transmitted in response to the signal ACK from the slave, and 1 byte in response to the signal ACK from the slave. Send data in units. Each time the slave receives 1 byte of data, it returns a signal ACK. When the data transmission is finished, the master sets a stop condition ST, and the communication is finished.

  When data is read by designating the address of the data register 20 that is a slave, the master MCU 36 sets a start condition ST and transmits a 7-bit slave address as shown in FIG. Then, after setting the read / write flag to 0, a 1-byte register address (100XXXX in the figure) is transmitted in response to the signal ACK from the slave.

  Further, the master sets the start condition ST again in response to the signal ACK from the slave, transmits the 7-bit slave address, and sets the read / write flag to 1. After returning the signal ACK, the slave transmits data to the master in units of 1 byte. Each time the master receives 1 byte of data, it returns a signal ACK. When receiving the last data, the master sets the stop condition ST after returning the signal NACK and ends the communication.

  When data is read without specifying the address of the slave data register 20, as shown in FIG. 2D, the master MCU 36 sets a start condition ST and transmits a 7-bit slave address. The read / write flag is set to 1. After returning the signal ACK, the slave transmits data to the master in units of 1 byte. Each time the master receives 1 byte of data, it returns a signal ACK. When receiving the last data, the master sets the stop condition ST after returning the signal NACK and ends the communication.

  FIG. 3 is a diagram showing the configuration of the data register 20. In FIG. 3, addresses 80h to 86h and 92h to 99h of the data register 20 are used for reading and writing (RW) of information, and addresses 8Ah to 91h are used for reading (R) of information. Each of the addresses 80h to 86h, 92h to 99h, and 8Ah to 91h constitutes a register. The address is indicated in hexadecimal (h).

  The register ALS_CONTROL at address 80h stores information related to ALS (Ambient Light Sensor) operation mode control and SW (software) reset. Information relating to PS (Proximity Sensor) operation mode control is stored in the register PS_CONTROL at the address 81h. The register I_LED at the address 82h stores information related to the selection of the LED to be activated and the current settings of the LEDs 31 and 32. Information relating to the current setting of the LED 33 is stored in the register I_LED 33 at the address 83h.

  Information related to the forced mode trigger is stored in the register ALS_PS_MEAS at the address 84h. Information relating to the PS measurement rate in the stand alone mode is stored in the register PS_MEAS_RATE at the address 85h. Information relating to the ALS measurement rate in the independent mode is stored in the register ALS_MEAS_RATE at the address 86h. In the register PART_ID at the address 8Ah, the part number and revision ID (Identification data: identification information), specifically, the ID of the proximity sensor 2 is stored. The ID of the manufacturer of the semiconductor device 1 is stored in the register MANUFAC_ID at the address 8Bh.

  The low-order byte of the measurement result of the illuminance sensor 10 is stored in the register ALS_DATA_0 at the address 8Ch. In the register ALS_DATA_1 at the address 8Dh, the upper byte of the measurement result of the illuminance sensor 10 is stored. In the register ALS_PS_STATUS at the address 8Eh, information on the measurement data and the interrupt state is stored.

  Proximity data from the LED 31 (infrared light measurement data from the LED 31) is stored in the register PS_DATA_LED 31 at address 8Fh. The register PS_DATA_LED 32 at the address 90h stores proximity data from the LED 32 (infrared light measurement data from the LED 32). The register PS_DATA_LED 33 at address 91h stores proximity data from the LED 33 (infrared light measurement data from the LED 33).

  Information relating to interrupt settings is stored in the register INTERRUPT at the address 92h. The PS interrupt threshold for the LED 31 is stored in the register PS_TH_LED 31 at the address 93h. The PS interrupt threshold for the LED 32 is stored in the register PS_TH_LED 32 at the address 94h. The PS interrupt threshold for the LED 33 is stored in the register PS_TH_LED 33 at the address 95h.

  The register ALS_TH_UP_0 at the address 96h stores the lower byte of the ALS upper threshold value. The register ALS_TH_UP_1 at the address 97h stores the upper byte of the ALS upper threshold value. The register ALS_TH_LOW_0 at the address 98h stores the lower byte of the ALS lower threshold value. In the register ALS_TH_LOW_1 at the address 99h, the upper byte of the ALS lower threshold value is stored.

  Next, main registers among the plurality of registers illustrated in FIG. 3 will be described in more detail. As shown in FIGS. 4A and 4B, the upper 5-bit addresses ADD7 to ADD3 of the register ALS_CONTROL of the address 80h are used as a reserve (RES) field, and the next 1-bit address ADD2 is used as an SW reset field. The lower two bits ADD1 and ADD0 are used as the ALS mode field. 0 is written in each of the addresses ADD7 to ADD3. In the address ADD2, 0 is written when the initial reset is not started, and 1 is written when the initial reset is started. In the addresses ADD1 and ADD0, 00 or 01 is written when the standby mode is set, 10 is written when the forced mode is set, and 11 is written when the independent mode is set.

  As shown in FIGS. 5A and 5B, the upper 6-bit addresses ADD7 to ADD2 of the register PS_CONTROL of the address 81h are used as the NA field, and the lower 2 bits ADD1 and ADD0 are used as the PS mode field. The Each of the addresses ADD7 to ADD2 is ignored. In the addresses ADD1 and ADD0, 00 or 01 is written when the standby mode is set, 10 is written when the forced mode is set, and 11 is written when the independent mode is set.

  As shown in FIGS. 6A and 6B, the upper two bits of the address ADD7 and ADD6 of the register I_LED of the address 82h are used as the PS activation field, and the next three bits ADD5 to ADD3 are the current field of the LED 32. The lower 3 bits ADD2 to ADD0 are used as the current field of the LED 31. When the LED 31 is activated and the LEDs 32 and 33 are deactivated, 00 is written in the higher addresses ADD7 and ADD6. When the LEDs 31 and 32 are activated and the LED 33 is deactivated, 01 is written in the higher addresses ADD7 and ADD6. When the LEDs 31 and 33 are activated and the LED 32 is deactivated, 10 is written in the higher addresses ADD7 and ADD6. When all the LEDs 31 to 33 are activated, 11 is written in the higher addresses ADD7 and ADD6.

  Any of 000 to 111 is written in the intermediate addresses ADD5 to ADD3. When the current value of the LED 32 is set to 5, 10, 20, 50, 100, or 150 mA, 000 to 101 are written respectively. When the current value of the LED 32 is set to 200 mA, one of 110 and 111 is written. Therefore, in the semiconductor device 1, the current value of the LED 32 can be set to a desired value among 5, 10, 20, 50, 100, 150, and 200 mA.

  Any of 000 to 111 is written in the lower addresses ADD2 to ADD0. When the current value of the LED 31 is set to 5, 10, 20, 50, 100, or 150 mA, 000 to 101 are written respectively. When the current value of the LED 31 is set to 200 mA, one of 110 and 111 is written. Therefore, in the semiconductor device 1, the current value of the LED 31 can be set to a desired value among 5, 10, 20, 50, 100, 150, and 200 mA.

  Further, as shown in FIGS. 7A and 7B, the upper 5-bit addresses ADD7 to ADD3 of the register I_LED33 of the address 83h are used as an NA (No Assign) field, and the lower 3-bit addresses ADD2 to ADD0 are LED33. Used as a current field. Each of the addresses ADD7 to ADD3 is ignored. Any of 000 to 111 is written in the addresses ADD2 to ADD0. When the current value of the LED 33 is set to 5, 10, 20, 50, 100, or 150 mA, 000 to 101 are written respectively. When the current value of the LED 33 is set to 200 mA, one of 110 and 111 is written. Therefore, in this semiconductor device 1, the current value of the LED 33 can be set to a desired value among 5, 10, 20, 50, 100, 150, and 200 mA.

  As shown in FIGS. 8A and 8B, the upper 6-bit addresses ADD7 to ADD2 of the register ALS_PS_MEAS at the address 84h are used as the NA field, and the next 1-bit address ADD1 is used as the ALS trigger field. The lower 1 bit ADD0 is used as the PS trigger field. Addresses ADD7 to ADD2 are ignored. In the address ADD1, 0 is written when a new ALS measurement is not started, and 1 is written when a new ALS measurement is started. In the address ADD0, 0 is written when a new PS measurement is not started, and 1 is written when a new PS measurement is started.

  Also, as shown in FIGS. 9A and 9B, the upper 4 bits of the address ADD7 to ADD4 of the register PS_MEAS_RATE at the address 85h are used as the NA field, and the lower 4 bits ADD3 to ADD0 are used as the PS measurement rate field. Is done. Each of the addresses ADD7 to ADD4 is ignored. Any one of 0000 to 1111 is written in the lower addresses ADD3 to ADD0. When the PS measurement rate is set to 10, 20, 30, 50, 70, 100, 200, 500, 1000, or 2000 msec, 0000 to 1001 are written. Even if any of 1010 to 1111 is written, it can be set to 2000 msec. Therefore, in this semiconductor device 1, it is possible to set the PS measurement rate to a desired value of 10 to 2000 msec.

  As shown in FIGS. 10A and 10B, the addresses ADD7 to ADD0 of the register ALS_PS_STATUS of the address 8Eh are respectively an ALS INT status field, an ALS data status field, an LED 33 INT status field, and an LED 33 data status field. , LED 32 INT status field, LED 32 data status field, LED 31 INT status field, and LED 31 data status field.

  In the ALS measurement, 0 is written in the address ADD7 when the signal INT is deactivated, and 1 is written when the signal INT is activated. In the address ADD6, 0 is written when the data is old data that has already been read in the ALS measurement, and 1 is written when the data is new data that has not yet been read.

  In the address measurement ADD5, 0 is written when the signal INT is deactivated in the PS measurement of the LED 33, and 1 is written when the signal INT is activated. In the address ADD4, 0 is written if the data is old data that has already been read in the PS measurement of the LED 33, and 1 is written if the data is new data that has not yet been read.

  In the PS measurement of the LED 32, 0 is written in the address ADD3 when the signal INT is deactivated, and 1 is written when the signal INT is activated. In the address ADD2, 0 is written in the PS measurement of the LED 32 if the data is old data that has already been read, and 1 is written if the data is new data that has not yet been read.

  In the PS measurement of the LED 31, 0 is written in the address ADD 1 when the signal INT is deactivated, and 1 is written when the signal INT is activated. In the address ADD0, 0 is written if the data is old data that has already been read in the PS measurement of the LED 31, and 1 is written if the data is new data that has not yet been read.

  Further, as shown in FIGS. 11A and 11B, the addresses ADD7 to ADD0 of the register PS_DATA_LED31 of the address 8Fh are used as the data field of the LED31. The PS measurement data of the LED 31 is stored in the addresses ADD7 to ADD0.

  The addresses ADD7 to ADD0 of the register PS_DATA_LED32 having the address 90h are used as data fields of the LED32. The PS measurement data of the LED 32 is stored in the addresses ADD7 to ADD0.

  The addresses ADD7 to ADD0 of the register PS_DATA_LED33 having the address 91h are used as data fields of the LED33. The PS measurement data of the LED 33 is stored at addresses ADD7 to ADD0.

  Further, as shown in FIGS. 12A and 12B, the addresses ADD7 and ADD4 of the register INTERRUPT of the address 92h are both used as the NA field, and the addresses ADD6 and ADD5 are used as the interrupt source field. The address ADD3 is used as an output mode field, the address ADD2 is used as an INT polarity field, and the addresses ADD1 and ADD0 are used as interrupt mode fields. Addresses ADD7 and ADD4 are ignored.

  Addresses ADD6 and ADD5 are written with 00 when an interrupt is triggered by ALS, written with 01 when an interrupt is triggered by LED31, and written with 10 when an interrupt is triggered by LED32. Is triggered by LED 33, 11 is written.

  Until the register INTERRUPT is read, 0 is written in the address ADD3 when the level of the INT pin (signal output terminal T4) is latched, and 0 is written when the level of the INT pin is updated after each measurement. In address ADD2, 0 is written when the INT pin is set to logic 0 ("L" level) when the signal INT is activated, and the INT pin is set to logic 1 ("H" level) when the signal INT is activated. Writes 1

  Addresses ADD1 and ADD0 are written with 00 when the INT pin is inactivated (high impedance state), written with 01 when PS measurement can be triggered, and written with 10 when ALS measurement can be triggered, Write 11 if PS and ALS measurements can be triggered.

  Further, as shown in FIGS. 13A and 13B, the addresses ADD7 to ADD0 of the register PS_TH_LED31 of the address 93h are used as the threshold field of the LED31. In the addresses ADD7 to ADD0, threshold values for the LEDs 31 are stored.

  The addresses ADD7 to ADD0 of the register PS_TH_LED32 of the address 94h are used as the threshold field of the LED32. In the addresses ADD7 to ADD0, threshold values for the LEDs 32 are stored.

  The addresses ADD7 to ADD0 of the register PS_TF_LED33 having the address 95h are used as threshold fields of the LED33. A threshold value for the LED 33 is stored in the addresses ADD7 to ADD0.

  As shown in FIG. 14, the addresses ADD7 to ADD0 of the register PS_DATA_LED31 having the address 8Fh are used as the PS data field of the LED31. The PS data of the LED 31 is stored in the addresses ADD7 to ADD0. For example, when 10000101 is written in the addresses ADD7 to ADD0, the light intensity is represented by 10A. However, A = (27 + 22 + 20) × 0.097 = 133 × 0.097. Therefore, the light intensity is 10A≈417 (μW / cm 2).

  FIG. 15 is a time chart showing a measurement sequence of the proximity sensor 2. FIG. 15 shows a case where all the infrared LEDs 31 to 33 are activated. The infrared LEDs 31 to 33 emit light sequentially by a predetermined time within one measurement period. twILED indicates the duration of the LED current pulse (one emission time of each infrared LED), for example, 300 μsec. twILED2 indicates the duration of the cumulative LED current pulse (the time from the start of light emission of the infrared LED 31 to the stop of light emission of the infrared LED 33), for example, 1 msec. tMPS indicates the proximity sensor measurement time, and is, for example, 10 msec. The measurement result is generated within this period tMPS. The PS measurement rate (measurement cycle) is used only in the independent mode, and is determined by the register PS_MEAS_RATE (85h) shown in FIG.

  When a measurement command is written by the master in the register PS_CONTROL (81h) shown in FIG. 5, the first PS measurement is triggered. The combination of the infrared LEDs 31 to 33 is set by the register I_LED (82h) shown in FIG. 6 and the register I_LED33 (83h) shown in FIG. When only the infrared LED 32 is deactivated, there is no idle time between the pulse of the LED 31 and the pulse of the LED 33.

  In the forced mode, the PS measurement is performed only once. The PS trigger bit (ADD0 of 84h) is overwritten from 1 to 0 after the completion of PS measurement. When 1 is written to the PS trigger bit by the master, PS measurement is started again. In the independent mode, the PS measurement is continued until the master indicates another mode. The measurement interval is determined by the register PS_MEAS_RATE (85h) shown in FIG.

  FIG. 16 is a time chart showing a measurement sequence of the illuminance sensor 10. In FIG. 16, tMALS indicates the illuminance sensor measurement time, and is 100 msec, for example. Measurement results are generated during this period. The ALS measurement rate (measurement period) is used only in the independent mode, and is determined by the register ALS_MEAS_RATE (86h) shown in FIG. When a measurement command is written by the master in the register ALS_CONTROL (80h) shown in FIG. 4, the first ALS measurement is triggered.

  In forced mode, the ALS measurement is performed only once. The ALS trigger bit (80h ADD1) is overwritten from 1 to 0 after the ALS measurement is completed. When 1 is written to the ALS trigger bit by the master, the ALS measurement is started again. In the independent mode, the ALS measurement is continued until the master indicates another mode. The measurement interval is determined by the register ALS_MEAS_RATE (86h) shown in FIG.

  FIGS. 17A to 17C are time charts showing the interrupt function. 17A shows the interrupt signal INT in the latch mode, FIG. 17B shows the interrupt signal INT in the non-latch mode, and FIG. 17C shows the PS measurement value (PS measurement data). Show. As the interrupt source, as shown in FIGS. 12A and 12B, it is possible to select an ALS measurement and any one of the three LEDs 31 to 33 as the interrupt source. Here, for example, it is assumed that the LED 31 is selected as the interrupt source.

  As shown in FIG. 15, the PS measurement value is updated every measurement period tMPS. The threshold value VTH for the LEDs 31 to 33 is stored in the register PS_TH_LED (93h, 94h, 95h) shown in FIG. When the PS measurement value for the LED 31 exceeds the threshold value VTH, the interrupt signal INT transitions from the non-activation level (“L” level in the figure) to the activation level (“H” level in the figure).

  As shown in FIGS. 12A and 12B, the output mode of the interrupt signal INT includes a latch mode and a non-latch mode. In the latch mode, as shown in FIG. 17A, the level of the interrupt signal INT is latched until the master reads the register INTERRUPT. In the non-latch mode, as shown in FIG. 17B, the level of the interrupt signal INT is updated after each PS measurement. The same applies when the LED 32 or 33 is selected as the interrupt source.

  When ALS measurement is selected as the interrupt source, the ALS measurement value is updated every measurement period tMALS as shown in FIG. The upper threshold value VTHU for ALS measurement is stored in the register ALS_TH_UP (96h, 97h) shown in FIG. The lower threshold value VTHL for ALS measurement is stored in the register ALS_TH_LOW (98h, 99h) shown in FIG. When the ALS measurement value is between lower threshold value VTHL and upper threshold value VTHU, interrupt signal INT is set to an inactive level (eg, “L” level). When the ALS measurement value is lower than the lower threshold value VTHL and when the ALS measurement value is higher than the upper threshold value VTHU, the interrupt signal INT is set to the activation level (for example, “H” level).

  18A to 18D are views showing the external appearance of the semiconductor device 1. 18A is a top view of the semiconductor device 1, FIG. 18B is a front view thereof, FIG. 18C is a bottom view thereof, and FIG. It is an arrangement plan of terminals T1-T10 seen from above. 18A to 18D, the semiconductor device 1 includes a printed wiring board 1a. The printed wiring board 1a is formed in, for example, a square having a side length of 2.8 mm.

  The circuits 2 to 15 and 20 to 25 shown in FIG. 1 are mounted on the surface of the printed wiring board 1a. The surface of the printed wiring board 1a is sealed with a transparent resin 1b. The height of the semiconductor device 1 is, for example, 0.9 mm. Terminals T1 to T10 are provided on the back surface of the printed wiring board 1a. The terminals T1 to T10 are arranged in a predetermined order along the four sides of the printed wiring board 1a.

<Application to mobile phones>
FIG. 19 is a diagram illustrating a method of using the semiconductor device 1. In FIG. 19, the semiconductor device 1 is mounted on a mobile phone 50 together with three infrared LEDs 31 to 33. The mobile phone 50 is formed in a vertically long rectangular shape. A touch panel (display device with a touch panel function) 51 is provided at the center of the mobile phone 50, and a speaker 52 and a microphone 53 are provided above and below the touch panel 51, respectively. The infrared LED 31 is arranged at the upper right corner of the surface of the mobile phone 50, the infrared LED 32 is arranged at a predetermined distance from the infrared LED 31 in the X direction (left direction) in the figure, and the infrared LED 33 is red. It is arranged at a position away from the outer LED 31 by a predetermined distance in the Y direction (downward direction) in the figure. The semiconductor device 1 is disposed adjacent to the infrared LED 31 in the X direction.

  FIG. 20 is a diagram showing the semiconductor device 1 and the infrared LED 31 mounted on the mobile phone 50. In FIG. 20, the semiconductor device 1 and the infrared LED 31 are disposed adjacent to the surface of the printed wiring board 54. A proximity sensor 2 and an illuminance sensor 10 are mounted on a printed wiring board 1a of the semiconductor device 1, and the surface of the printed wiring board 1a is sealed with a transparent resin 1b. A transparent plate 56 is disposed on the printed wiring board 54 via a light-shielding spacer 55, and the semiconductor device 1 and the infrared LED 31 are protected by the transparent plate 56.

  The infrared light α emitted from the infrared LED 31 is reflected by the reflector 34 and enters the proximity sensor 2. The proximity sensor 2 stores PS measurement data at a level corresponding to the light intensity of the incident infrared light α in the data register 20. The reflector 34 is, for example, a user's ear or hand of the mobile phone 50. Further, the visible light β emitted from the visible light source 35 enters the illuminance sensor 10. The illuminance sensor 10 stores ALS measurement data indicating the illuminance of the incident visible light β in the data register 20.

  In the mobile phone 50, as shown in FIG. 21, an MCU 36, a backlight 57, and a driver IC 58 are provided. The backlight 57 gives transmitted light to the touch panel 51. The driver IC 58 drives the backlight 57 according to the control signal from the MCU 36. The MCU 36 controls the entire mobile phone 50 according to a signal from the touch panel 51. Further, the MCU 36 controls the driver IC 58 and the touch panel 51 according to the data signal from the semiconductor device 1.

  That is, the MCU 36 detects the illuminance of the place where the mobile phone 50 is used by the data signal (ALS measurement data) from the semiconductor device 1 and controls the brightness of the backlight 57 according to the detected illuminance. Thereby, the image displayed on the touch panel 51 can be displayed clearly. In addition, power consumption can be reduced.

  Further, when the MCU 36 detects that the touch panel 51 of the mobile phone 50 is close to the ear of the user of the mobile phone 50 by the data signal (PS measurement data) from the semiconductor device 1, the MCU 36 stops the function of the touch panel 51. . Thereby, malfunction when the user's ear of the mobile phone 50 contacts the touch panel 51 can be prevented.

  Further, the MCU 36 detects the hand gesture of the user of the mobile phone 50 based on the PS measurement value indicating the reflected light intensity of the infrared LEDs 31 to 33, and performs the scroll operation of the image displayed on the touch panel 51 according to the detection result. . That is, when the user of the mobile phone 50 moves his / her hand in the X direction in FIG. 19 on the surface of the mobile phone 50, first, the infrared LEDs 31 and 33 are covered with hands, and then the infrared LED 32 is moved by hand. Covered with. In this case, as shown in FIG. 22A, the reflected light intensity of the infrared LEDs 31 and 33 is first increased, and then the reflected light intensity of the infrared LED 32 is increased. When the reflected light intensity of the infrared LEDs 31 to 33 changes in a manner as shown in FIG. 22A, the MCU 36 determines that the user's hand has moved in the lateral direction, and for example, displays the image on the touch panel 51. Scroll horizontally.

  When the user of the mobile phone 50 moves his / her hand in the Y direction in FIG. 19 on the surface of the mobile phone 50, the infrared LEDs 31 and 32 are first covered with the hand, and then the infrared LED 33 is the hand. Covered. In this case, as shown in FIG. 22B, the reflected light intensity of the infrared LEDs 31 and 32 is first increased, and then the reflected light intensity of the infrared LED 33 is increased. When the reflected light intensity of the infrared LEDs 31 to 33 changes in a manner as shown in FIG. 22B, the MCU 36 determines that the user's hand has moved in the vertical direction. Scroll vertically.

  As described above, according to this embodiment, since the mobile phone 50 can be operated in accordance with the movement of the reflecting object detected in a touchless manner, the apparatus can be compared with a conventional configuration using an acceleration sensor or the like. Can be reduced in size, reduced in price, and simplified in configuration. Further, since there is no need to move the mobile phone 50 as in the case of a mobile phone equipped with an acceleration sensor or the like, the mobile phone 50 is not damaged by hitting something when the mobile phone 50 is moved.

<Details of motion detection algorithm>
Next, the motion detection algorithm of the reflector 34 in the MCU 36 will be described in more detail.

  FIG. 23 is a time chart for explaining the threshold value determining operation of the PS measurement value in the MCU 36. From the top, the first PS measurement value PS_DATA_LED 31 (from the infrared LED 31 to the infrared sensor 6 through the reflector 34 is shown in order from the top. First reflected light intensity information indicating the intensity of the first reflected light), second PS measurement value PS_DATA_LED 32 (second reflected light intensity indicating the intensity of the second reflected light from the infrared LED 32 through the reflector 34 to the infrared sensor 6) Information) and the third PS measurement value PS_DATA_LED 33 (first reflected light intensity information indicating the intensity of the third reflected light from the infrared LED 33 through the reflector 34 to the infrared sensor 6) are depicted. Yes.

  The MCU 36 compares the first PS measurement value PS_DATA_LED 31 with the first threshold value PS_TH_LED 31 when detecting the movement of the reflector 34 in a non-contact manner, the first detection start time Tr31, the first detection end time Tf31, and the first detection maintenance time. t31 is acquired. The MCU 36 also compares the second PS measurement value PS_DATA_LED32 with the second threshold value PS_TH_LED32, and also compares the third PS measurement value PS_DATA_LED33 with the third threshold value PS_TH_LED33. The second detection start time Tr32 and the second detection end time Tf32 , And a second detection maintenance time t32, a third detection start time Tr33, a third detection end time Tf33, and a third detection maintenance time t33, respectively.

  The first PS measurement value PS_DATA_LED 31, the second PS measurement value PS_DATA_LED 32, and the third PS measurement value PS_DATA_LED 33 are all input from the semiconductor device 1 to the MCU 36. The first threshold PS_TH_LED 31, the second threshold PS_TH_LED 32, and the third threshold PS_TH_LED 33 are all set by the MCU 36.

  FIG. 24A is a flowchart for explaining the monitoring operation of the PS measurement value by the MCU 36. When data acquisition of PS measurement values is started, the idling state in step S101 is passed, and in step S102, any PS measurement value PS_DATA_LEDx (where x is 31 to 33, and the same applies below) corresponds to the threshold value. A determination is made whether PS_TH_LEDx is exceeded. If the determination is yes, the flow proceeds to step S103. On the other hand, if a negative determination is made, the flow returns to step S101, and thereafter, step S101 and step S102 are looped.

  In step S103, counting of the detection maintaining time tx is started, and the flow proceeds to step S104.

  In step S104, it is determined whether or not the detection maintenance time tx exceeds a predetermined threshold time tTH1. Here, when a no determination is made, it is determined that there is a possibility that the reflector 34 has crossed over the infrared LEDs 31 to 33 or the semiconductor device 1 (a possibility that a touchless motion operation has been performed). Thus, the flow proceeds to step S105. On the other hand, when a yes determination is made, the reflector 34 may be stationary above the infrared LEDs 31 to 33 or the semiconductor device 1 (a click operation or a zoom-in / zoom-out operation may have been performed). The flow is advanced to step S111 (click process or zoom-in / zoom-out process). The specific processing in step S107 will be described in detail later.

  In step S105, it is determined whether or not the first PS measurement value PS_DATA_LED 31 is included as the PS measurement value determined to exceed the threshold value in step S102. If the determination is yes, the flow proceeds to step S106. On the other hand, if a negative determination is made, the flow is returned to step S101 to enter an idling state.

  In step S106, it is further determined whether or not at least one of the second PS measurement value PS_DATA_LED32 and the third PS measurement value PS_DATA_LED33 is included as the PS measurement value determined to exceed the threshold value in step S102. If the determination is yes, the flow proceeds to step S107. On the other hand, if a negative determination is made, the flow is returned to step S101 to enter an idling state.

  In step S107, in view of the layout of FIG. 19, it is assumed that at the time of touchless motion operation, at least one of the second reflected light and the third reflected light is detected together with the first reflected light. The phase difference of the intensity change generated between the first reflected light and the second reflected light, or the phase difference of the intensity change generated between the first reflected light and the third reflected light is calculated, and the calculation is performed. Based on the result, a motion determination process of the reflector 34 is performed. This is the reason why Steps S105 and S106 are provided as preconditions for proceeding to Step S107. However, as for the above steps S105 and S106, the process proceeds to step S107 only when all PS measurement values PS_DATA_LEDx are included as PS measurement values determined to exceed the threshold value in step S102. The conditions may be strict.

  The specific processing in step S107 will be described in detail here in order to be described later in detail. For example, in the arrangement layout of FIG. 19, when the reflector 34 moves in the left-right direction, the detection timing (first detection start time) of the first reflected light incident on the infrared sensor 6 from the infrared LED 31 through the reflector 34. There is a time difference between Tr31) and the detection timing (second detection start time Tr32) of the second reflected light incident on the infrared sensor 6 from the infrared LED 32 via the reflector 34. Therefore, by determining the absolute value and the positive / negative of this difference value, it is possible to detect whether the reflector 34 has moved from right to left or from left to right. The determination method in the vertical direction is basically the same as described above.

  When the movement determination process of the reflecting object 34 in step S107 is completed, in step S108, the moving speed v of the reflecting object 34 is calculated based on the detection maintaining time tx.

  In subsequent step S109, image processing (scroll processing or page switching processing described later) based on the return value return acquired in step S107 and the moving speed v calculated in step S108 is performed, and the result is output to the touch panel 51. Is done.

  In step S110, the series of processing results is initialized, and the flow returns to step S101 again.

  Note that the PS measurement value PS_DATA_LEDx output from the semiconductor device 1 may be affected by various noise light sources (infrared remote control, incandescent lamp, strong sunlight, etc.) and noise may be superimposed (FIG. 24D). (See top). When such noise is superimposed, the MCU 36 cannot distinguish whether the intensity change occurring in the PS measurement value PS_DATA_LEDx is due to touchless motion operation or noise, and may cause erroneous detection or malfunction. there were.

  Therefore, in order to solve the above problem, prior to step S101 in FIG. 24A, the MCU 36 performs a data averaging process on the PS measurement value PS_DATA_LEDx (see step S100 surrounded by a thick frame in FIG. 24B). It is desirable to generate the averaged PS measurement value PS_AVR_LEDx and use this to perform the subsequent arithmetic processing (particularly, refer to Step S102, Step S105, and Step S106 surrounded by a thick frame in FIG. 24B). With such a configuration, it is possible to reduce the influence of noise and prevent erroneous detection and malfunction of touchless motion operation (see the middle and lower stages of FIG. 24D). As the data averaging process in step S100, as shown in FIG. 24C, a moving average process for the latest L samples may be performed.

  FIG. 25 is a flowchart showing details of the motion determination process in step S107. When the flow starts, in step S201, the first detection start time Tr31, the second detection start time Tr32, and the third detection start time Tr33 are acquired, and in the subsequent step S202, the first reflected light and the second reflected light are acquired. Phase difference Δ12 (= Tr31−Tr32) of intensity change occurring between the light and phase difference Δ13 (= Tr31−Tr33) of intensity change occurring between the first reflected light and the third reflected light. ) Is calculated.

  Here, the configuration for calculating the phase differences Δ12 and Δ13 based on the first detection start time Tr31, the second detection start time Tr32, and the third detection start time Tr33 is given as an example. The phase difference Δ12 ′ (= Tf31−Tf32) and the phase difference Δ13 based on the first detection end time Tf31, the second detection end time Tf32, and the third detection end time Tf33. It is good also as a structure which calculates' (= Tf31-Tf33).

  After the calculation of the phase differences Δ12 and Δ13, it is determined in step S203 whether or not the absolute value | Δ12 | of the phase difference Δ12 is larger than the absolute value | Δ13 | of the phase difference Δ13. Here, when a yes determination is made, the moving axis X in which the reflector 34 extends in the first moving axis (the direction connecting the infrared LED 31 and the infrared LED 32 (the horizontal direction in the arrangement layout of FIG. 19)). ) And the flow proceeds to step S204. On the other hand, if a negative determination is made, the flow proceeds to step S209.

  In step S204, it is determined whether or not the phase difference Δ12 is smaller than 0, that is, whether or not the phase difference Δ12 is a negative value. Here, when a positive determination is made, it is determined that the reflector 34 has moved in the first direction (the direction from the infrared LED 31 to the infrared LED 32 (leftward in the arrangement layout of FIG. 19)), and the flow is The process proceeds to step S205. On the other hand, if a negative determination is made, the flow proceeds to step S206.

  In step S205, a value “1” indicating that the reflector 34 has moved in the first direction is output as the return value return, and the series of flows ends.

  In step S206, it is determined whether or not the phase difference Δ12 is greater than 0, that is, whether or not the phase difference Δ12 is a positive value. Here, when a yes determination is made, it is determined that the reflector 34 has moved in the second direction (the direction from the infrared LED 32 to the infrared LED 31 (rightward in the arrangement layout of FIG. 19)), and the flow is The process proceeds to step S207. On the other hand, if a negative determination is made, the flow proceeds to step S208.

  In step S207, a value “2” indicating that the reflector 34 has moved in the second direction is output as the return value return, and the series of flows ends.

  In step S208, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  In step S209, it is determined whether or not the absolute value | Δ12 | of the phase difference Δ12 is smaller than the absolute value | Δ13 | of the phase difference Δ13. Here, when a yes determination is made, the moving axis Y in which the reflector 34 extends in the second moving axis (the direction connecting the infrared LED 31 and the infrared LED 33 (vertical direction in the arrangement layout of FIG. 19)). ) And the flow proceeds to Step S210. On the other hand, if a negative determination is made, the flow proceeds to step S215.

  In step S210, it is determined whether or not the phase difference Δ13 is smaller than 0, that is, whether or not the phase difference Δ13 is a negative value. Here, if a yes determination is made, it is determined that the reflector 34 has moved in the third direction (the direction from the infrared LED 31 to the infrared LED 33 (downward in the arrangement layout of FIG. 19)), and the flow is The process proceeds to step S211. On the other hand, if a negative determination is made, the flow proceeds to step S212.

  In step S211, a value “3” indicating that the reflector 34 has moved in the third direction is output as the return value return, and the series of flows ends.

  In step S212, it is determined whether or not the phase difference Δ13 is greater than 0, that is, whether or not the phase difference Δ13 is a positive value. Here, if a yes determination is made, it is determined that the reflector 34 has moved in the fourth direction (the direction from the infrared LED 33 to the infrared LED 31 (upward in the arrangement layout of FIG. 19)), and the flow is The process proceeds to step S213. On the other hand, if a negative determination is made, the flow proceeds to step S214.

  In step S213, a value “4” indicating that the reflector 34 has moved in the fourth direction is output as the return value return, and the series of flows ends.

  In step S214, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  In step S215, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  FIG. 26 is a schematic diagram illustrating an example of display processing corresponding to the left-right motion, and FIG. 27 is a schematic diagram illustrating an example of display processing corresponding to the vertical motion. As described above, the touchless motion function enables a scroll operation such as a map image and a page switching operation such as a photographic image to be realized without contact.

  FIG. 28 is a time chart for explaining the shift operation to the zoom process. As described above, when detecting the movement of the reflector 34 by non-contact, if the detection maintenance time tx of the PS measurement value PS_DATA_LEDx exceeds the predetermined threshold time tTH1, the process proceeds to the click process or the zoom-in / zoom-out process. (See steps S104 and S111 in FIG. 24A or FIG. 24B). Here, if the click process is executed, some action operation (selection of a command button displayed on the screen, etc.) may be performed when the detection maintaining time tx reaches the threshold time tTH1. On the other hand, if the zoom-in / zoom-out process is executed, the PS measurement value PS_DATA_LEDx that changes according to the movement of the reflector 34 after the detection maintaining time tx reaches the threshold time tTH1 and a predetermined conversion table are sequentially referred to. On the other hand, the zoom factor Z of the display screen may be determined and image processing may be performed to reflect this.

  FIG. 29 is a flowchart showing details of the zoom process in step S111 of FIG. 24A or FIG. 24B. When the flow starts, the PS measurement value PS_DATA_LEDx is acquired in step S301.

  In subsequent step S302, it is determined whether or not the state where the PS measurement value PS_DATA_LEDx exceeds the threshold value PS_TH_LEDx is maintained. Here, if it is determined that the state where the PS measurement value PS_DATA_LEDx exceeds the threshold value PS_TH_LEDx is maintained, the flow proceeds to step S303. On the other hand, if it is determined that the state where the PS measurement value PS_DATA_LEDx exceeds the threshold value PS_TH_LEDx is not maintained, the flow proceeds to step S305. In step S305, it is determined whether or not the state where the PS measurement value PS_DATA_LEDx does not exceed the threshold value PS_TH_LEDx is continued for a predetermined time tTH2. If the determination is no, the flow returns to step S301. On the other hand, when a positive determination is made, the above series of flows is terminated in order to finish accepting the zoom ratio operation.

  If the plurality of PS measurement values PS_DATA_LEDx exceed the corresponding threshold value PS_TH_LEDx, the total value or average value of the PS measurement values may be compared with the total value or average value of the threshold values in step S302. . That is, it should be noted that if it is desired to realize only zoom-in / zoom-out processing, it is not always necessary to provide a plurality of infrared LEDs.

  In step S303, the zoom ratio Z is determined by comparing and referring to the PS measurement value PS_DATA_LEDx and a predetermined conversion table. In subsequent step S304, image processing based on the zoom factor Z is performed, and then the flow returns to step S301.

  FIG. 30A is a diagram showing an example of the conversion table referred to in step S303. This conversion table is based on the assumption that the PS measurement value PS_DATA_LEDx can take a value from “0d” to “255d”, whereas the threshold PS_TH_LEDx is set to “127d”, and the zoom rate Z is The content can be variably set in 8 levels (50%, 75%, 100%, 150%, 200%, 300%, 400%, 800%).

  For example, when the PS measurement value PS_DATA_LEDx is “128d” to “143d”, the zoom factor Z is set to “50%”, and when the PS measurement value PS_DATA_LEDx is “160d” to “175d”, the zoom factor Z is Set to “100%”. Further, when the PS measurement value PS_DATA_LEDx is “240d” to “255d”, the zoom ratio Z is set to “800%”.

Further, without using the above conversion table, for example, the zoom rate Z may be sequentially calculated by the following arithmetic expression.
Z = (default magnification) + {(PS_DATA_LEDx) − (zoom reference value)} × k

  FIG. 30B is a table for explaining another method of step S303. Here, it is assumed that the zoom ratio Z is calculated using the above arithmetic expression, and it is assumed that the default magnification is set to 100%, the zoom reference value is set to 90, and the coefficient k is set to 3 as preconditions for the calculation process. To do. Further, it is assumed that the PS measurement value PS_DATA_LEDx is updated every 10 ms, for example, with reference to the time point (elapsed time 0) when shifting to the zoom ratio operation.

  In the example of FIG. 30B, the PS measurement value PS_DATA_LEDx at the time of shifting to the zoom ratio operation (elapsed time 0) is 80. Therefore, the zoom factor Z is calculated as 70% (= 100 + (80−90) × 3). The PS measurement value PS_DATA_LEDx obtained after 10 ms elapses is 82. Therefore, the zoom factor Z is calculated as 76% (= 100 + (82−90) × 3). Thereafter, the zoom ratio Z is sequentially calculated by the same calculation process.

  FIG. 31 is a schematic diagram illustrating an example of display processing according to perspective motion. As described above, the touchless motion function enables a zoom-in / zoom-out operation such as a map image or a photographic image to be performed in a non-contact manner.

  The arrangement layout of FIG. 19 is a combination of the infrared LED 31 and the semiconductor device 1 to realize a proximity sensor, and the infrared LED 32 and the infrared LED 33 are optionally arranged, whereby the touchless motion described above is achieved. Although a function is added, in order to determine the movement of the reflector 34 in more detail, it is necessary to devise an arrangement of the semiconductor device 1 and the infrared LEDs 31 to 33.

  FIG. 32 is a schematic diagram illustrating a modification regarding the arrangement of the semiconductor device 1 and the infrared LEDs 31 to 33. In the arrangement layout of this modification, the infrared LEDs 31 to 33 are provided at each vertex position of the equilateral triangle τ, and the semiconductor device 1 including the infrared sensor 6 is provided at the center of gravity of the equilateral triangle τ. By adopting such an arrangement layout, the movement of the reflector 34 can be determined in more detail by a motion detection algorithm described later.

  In FIG. 32, the configuration using three infrared LEDs 31 to 33 is given as an example. However, the configuration is not limited to this, and light is emitted to each vertex of a regular polygon having four or more vertices. It is good also as a structure provided with the part.

  FIG. 33 is a flowchart showing the motion determination process in step S107 when the layout of FIG. 32 is adopted. When the flow starts, in step S401, the first detection start time Tr31, the second detection start time Tr32, and the third detection start time Tr33 are acquired, and in the subsequent step S402, the first reflected light and the second reflected light are acquired. Intensity change phase difference Δ12 (= Tr31−Tr32) generated between the first reflected light and the third reflected light Δ13 (= Tr31−Tr33), And the phase difference Δ23 (= Tr32−Tr33) of the intensity change occurring between the second reflected light and the third reflected light is calculated.

  Note that, here, the configuration in which the phase differences Δ12, Δ13, and Δ23 are calculated based on the first detection start time Tr31, the second detection start time Tr32, and the third detection start time Tr33 is taken as an example. The configuration is not limited to this, and based on the first detection end time Tf31, the second detection end time Tf32, and the third detection end time Tf33, the phase difference Δ12 ′ (= Tf31−Tf32), the position The phase difference Δ13 ′ (= Tf31−Tf33) and the phase difference Δ23 ′ (= Tf32−Tf33) may be calculated.

  After the calculation of the phase differences Δ12, Δ13, and Δ23, in step S403, the absolute value | Δ12 | of the phase difference Δ12 is larger than the absolute value | Δ13 | of the phase difference Δ13 and the absolute value of the phase difference Δ12. It is determined whether the value | Δ12 | is larger than the absolute value | Δ23 | of the phase difference Δ23. Here, when a yes determination is made, the reflector 34 has a first movement axis (a movement axis extending in the direction connecting the infrared LED 31 and the infrared LED 32 (left and right in the arrangement layout of FIG. 32)). It is judged that it moved along, and a flow is advanced to step S404. On the other hand, if a negative determination is made, the flow proceeds to step S409.

  In step S404, it is determined whether or not the phase difference Δ12 is smaller than zero. Here, when a yes determination is made, it is determined that the reflector 34 has moved in the first direction (the direction from the infrared LED 31 to the infrared LED 32 (leftward in the arrangement layout of FIG. 32)), and the flow is The process proceeds to step S405. On the other hand, if a negative determination is made, the flow proceeds to step S406.

  In step S405, a value “1” indicating that the reflector 34 has moved in the first direction is output as the return value return, and the series of flows ends.

  In step S406, it is determined whether or not the phase difference Δ12 is greater than zero. Here, when a positive determination is made, it is determined that the reflector 34 has moved in the second direction (the direction from the infrared LED 32 to the infrared LED 31 (rightward in the arrangement layout of FIG. 32)), and the flow is The process proceeds to step S407. On the other hand, if a negative determination is made, the flow proceeds to step S408.

  In step S407, a value “2” indicating that the reflector 34 has moved in the second direction is output as the return value return, and the series of flows ends.

  In step S408, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  In step S409, the absolute value | Δ13 | of the phase difference Δ13 is larger than the absolute value | Δ12 | of the phase difference Δ12, and the absolute value | Δ23 | of the phase difference Δ23 is larger than the absolute value | Δ12 | A determination is made as to whether it is greater. If the determination is yes, the reflector 34 is connected to the second movement axis (the direction connecting the midpoint of the line segment connecting the infrared LED 31 and the infrared LED 32 and the infrared LED 33 (the layout shown in FIG. 32). Is determined to have moved along the movement axis extending in the vertical direction), and the flow proceeds to step S410. On the other hand, if a negative determination is made, the flow proceeds to step S415.

  In step S410, it is determined whether or not the phase difference Δ13 is smaller than 0 and the phase difference Δ23 is smaller than 0. Here, when a yes determination is made, the reflector 34 is in the third direction (the direction from the midpoint of the line segment connecting the infrared LED 31 and the infrared LED 32 to the infrared LED 33 (downward in the arrangement layout of FIG. 32). )), The flow proceeds to step S411. On the other hand, if a negative determination is made, the flow proceeds to step S412.

  In step S411, a value “3” indicating that the reflector 34 has moved in the third direction is output as the return value return, and the series of flows ends.

  In step S412, it is determined whether or not the phase difference Δ13 is greater than 0 and the phase difference Δ23 is greater than 0. Here, when a positive determination is made, the reflector 34 is in the fourth direction (the direction from the infrared LED 33 to the midpoint of the line segment connecting the infrared LED 31 and the infrared LED 32 (upward in the arrangement layout of FIG. 32). )), The flow proceeds to step S413. On the other hand, if a negative determination is made, the flow proceeds to step S414.

  In step S413, a value “4” indicating that the reflector 34 has moved in the fourth direction is output as the return value return, and the series of flows ends.

  In step S414, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  In step S415, the absolute value | Δ12 | of the phase difference Δ12 is larger than the absolute value | Δ13 | of the phase difference Δ13, and the absolute value | Δ23 | of the phase difference Δ23 is larger than the absolute value | Δ13 | of the phase difference Δ13. A determination is made as to whether it is greater. If a yes determination is made here, the reflector 34 has a third movement axis (the direction connecting the midpoint of the line segment connecting the infrared LED 31 and the infrared LED 33 and the infrared LED 32 (the layout shown in FIG. 32). Then, it is determined that the movement has occurred along the movement axis) extending in the diagonally downward direction (upward to the left), and the flow proceeds to step S416. On the other hand, if a negative determination is made, the flow proceeds to step S421.

  In step S416, it is determined whether or not the phase difference Δ12 is smaller than 0 and the phase difference Δ23 is smaller than 0. Here, when a yes determination is made, the reflector 34 is in the fifth direction (the direction from the midpoint of the line segment connecting the infrared LED 31 and the infrared LED 33 to the infrared LED 32 (left in the layout shown in FIG. 32). It is determined that the movement has been made upward)), and the flow proceeds to step S417. On the other hand, if a negative determination is made, the flow proceeds to step S418.

  In step S417, a value “5” indicating that the reflector 34 has moved in the fifth direction is output as the return value return, and the series of flows ends.

  In step S418, it is determined whether or not the phase difference Δ12 is greater than 0 and the phase difference Δ23 is greater than 0. Here, when a yes determination is made, the reflector 34 is in the sixth direction (the direction from the infrared LED 32 to the midpoint of the line segment connecting the infrared LED 31 and the infrared LED 33 (right in the arrangement layout of FIG. 32). It is determined that the movement has been made downward)), and the flow proceeds to step S419. On the other hand, if a negative determination is made, the flow proceeds to step S420.

  In step S419, a value “6” indicating that the reflector 34 has moved in the sixth direction is output as the return value return, and the series of flows ends.

  In step S420, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  In step S421, the absolute value | Δ12 | of the phase difference Δ12 is larger than the absolute value | Δ23 | of the phase difference Δ23, and the absolute value | Δ13 | of the phase difference Δ13 is larger than the absolute value | Δ23 | A determination is made as to whether it is greater. When a positive determination is made here, the reflector 34 is connected to the fourth movement axis (the direction connecting the midpoint of the line segment connecting the infrared LED 32 and the infrared LED 33 and the infrared LED 31 (the layout shown in FIG. 32). Then, it is determined that the movement has occurred along the movement axis) extending in the diagonal direction (upward to the right (downward to the left)), and the flow proceeds to step S422. On the other hand, if a negative determination is made, the flow proceeds to step S427.

  In step S422, it is determined whether or not the phase difference Δ12 is smaller than 0 and the phase difference Δ13 is smaller than 0. Here, when a yes determination is made, the reflector 34 is in the seventh direction (the direction from the infrared LED 31 to the midpoint of the line segment connecting the infrared LED 32 and the infrared LED 33 (left in the arrangement layout of FIG. 32). It is determined that the movement has been made downward)), and the flow proceeds to step S423. On the other hand, if a negative determination is made, the flow proceeds to step S424.

  In step S423, a value “7” indicating that the reflector 34 has moved in the seventh direction is output as the return value return, and the series of flows ends.

  In step S424, it is determined whether or not the phase difference Δ12 is greater than 0 and the phase difference Δ13 is greater than 0. Here, when a yes determination is made, the reflector 34 is in the eighth direction (the direction from the midpoint of the line segment connecting the infrared LED 32 and the infrared LED 33 to the infrared LED 31 (right in the arrangement layout of FIG. 32). It is determined that it has moved upward)), and the flow is advanced to step S425. On the other hand, if a negative determination is made, the flow proceeds to step S426.

  In step S425, a value “8” indicating that the reflector 34 has moved in the eighth direction is output as the return value return, and the series of flows ends.

  In step S426, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  In step S427, a value “0” indicating that the motion determination process has not been performed correctly is output as the return value return, and the series of flows ends.

  Further, if the arrangement layout of FIG. 32 is adopted, in addition to the algorithm described above, the ratio of the first PS measurement value PS_DATA_LED31 and the second PS measurement value PS_DATA_LED32 (= PS_DATA_LED32 / PS_DATA_LED31) and the first PS measurement value PS_DATA_LED31 By calculating the ratio (= PS_DATA_LED33 / PS_DATA_LED31) with the third PS measurement value PS_DATA_LED33, the cursor can be operated (see FIGS. 34 and 35).

  FIG. 36 is a schematic diagram showing an application example of the motion detection device adopting the arrangement layout of FIG. As described above, the motion detection apparatus can be used as a non-contact type user interface for various electronic devices including a personal computer.

  As described above, the MCU 36 sequentially emits from the infrared LEDs 31 to 33 provided at different positions, and passes through the reflector 34 to the one infrared sensor 6 to indicate the intensity of each reflected light. Receiving the value PS_DATA_LED31, the second PS measurement value PS_DATA_LED32, and the third PS measurement value PS_DATA_LED33, respectively calculating the phase differences (Δ12, Δ13, and Δ23) of the intensity changes occurring between the reflected lights, The movement of the reflector 34 is determined based on the calculation result (see, for example, FIGS. 25 and 33).

  In particular, the MCU 36 has a phase difference Δ12 of intensity change generated between the first reflected light and the second reflected light, and a phase difference Δ13 of intensity change generated between the first reflected light and the third reflected light. The absolute values of at least two phase differences among the phase differences Δ23 of the intensity change generated between the second reflected light and the third reflected light are obtained, and the reflecting object is based on the magnitude relationship thereof. 34 is determined (see, for example, steps S203 and S209 in FIG. 25 and steps S403, S409, S415, and S421 in FIG. 33).

  Further, the MCU 36 determines the moving direction of the reflector 34 on the moving axis based on the positive / negative of the phase difference of which the absolute value is determined to be larger among the two phase differences of which the absolute values are compared. (See, for example, steps S204, S206, S210, and S212 in FIG. 25 and steps S404, S406, S410, S412, S416, S418, S422, and S424 in FIG. 33.) .

  In the case of the MCU 36 having such a configuration, and a motion detection device and an electronic apparatus using the MCU 36, not only the proximity of the reflector but also the reflector can be achieved only by a simple system change in which a plurality of infrared LEDs are arranged. It is possible to determine in which direction the has passed.

  Therefore, for example, by performing image processing based on the above motion determination result, it is possible to realize a non-contact image operation function (touchless motion function). This technology can be a new UI (user interface) suitable for mounting on mobile phones, digital cameras, etc. In addition to scenes that dislike contact operations, such as operating a hospital examination reception machine, cooking, etc. This can be very effective in situations such as when switching the page of an electronic book when your hands are dirty. In public facilities and the like, devices (vending machines, etc.) with which an unspecified number of people come into contact can be operated without contact, which is considered to be useful for preventing infectious diseases.

  Note that the arithmetic algorithm for realizing the motion detection process may be realized using dedicated hardware, or may be realized in software by loading a predetermined program into a general-purpose microcomputer and executing it. May be.

<Application to task light>
FIG. 37 is an external view showing a structural example of a lighting device. As shown in FIG. 37, the illumination device 100 of this configuration example is a task light including a housing 110, an arm 120, and a pedestal 130.

  The casing 110 has a light source holding part 111, an operation part 112, and an arm attachment part 113 when viewed structurally, and one end thereof is supported by the arm 120. The light source holding unit 111 holds a plurality of light sources 114 in a row on the lower surface side. Note that an LED can be preferably used as the light source 114. The operation unit 112 holds a touchless sensor 115 on the lower surface side. The touchless sensor 115 is a component for detecting the proximity and movement of an object (such as a user's hand or finger) without contact. As the touchless sensor 115, the above-described semiconductor device 1 (including the externally attached infrared sensors 31 to 33) can be suitably used, and therefore, redundant description regarding the configuration and operation thereof is omitted. As described above, when the LED is used as the light source 114 and the touchless sensor 115 is used as a user operation detection unit, the casing 110 can be formed extremely thin (to a thickness of about 10 to 15 mm). It becomes possible. The arm attachment portion 113 is provided at an end portion of the housing 110, and one end of the arm 120 is attached thereto.

  The arm 120 is a support member that connects the housing 110 and the pedestal 130, and is configured to be arbitrarily bent. The pedestal 130 is placed on a desk or table and supports the casing 110 and the arm 120.

  In the illumination device 100 having the above structure, the touchless sensor 115 is preferably installed in the vicinity of the arm attachment portion 113 to which the arm 120 is attached. With such a configuration, even if a hand or a finger touches the touchless sensor 115 during operation, it is difficult to apply excessive force to the housing 110, so that the housing 110 is not damaged or deformed in advance. It becomes possible to prevent.

  FIG. 38 is a block diagram illustrating a configuration example of the lighting device 100 (particularly, the peripheral configuration of the touchless sensor 115). As shown in FIG. 38, the illumination device 100 of this configuration example includes a light source 114, a touchless sensor 115 for detecting the proximity and movement of an object in a non-contact manner, and a light source based on the output of the touchless sensor 115. And a control unit 116 (corresponding to the above-described MCU 36) that performs driving control of 114.

  Each of the plurality of light sources 114 includes a plurality of LED elements having different emission colors (in FIG. 38, three types of red LED 114R, green LED 114G, and blue LED 114B), and the control unit 116 controls each color. The LED elements are individually driven and controlled. With such a configuration, the control unit 116 can perform not only the lighting on / off control and light control (light amount control) of the light source 114 but also the color control (color temperature control) of the light source 114. .

  FIG. 39 is a schematic diagram illustrating an example of touchless lighting control. As shown in FIG. 39, the control unit 116 controls the turning on / off of the light source 14 when the user's hand or finger is in a state of being close to the operation unit 112 (touchless sensor 115) and stopped for a predetermined time. I do. For example, when the light source 114 is turned off and the user's hand or finger is in close proximity to the operation unit 112 (touchless sensor 115) and is stationary for a predetermined time, the light source 114 is turned on. When the light source 114 is turned on and the user's hand or finger is in proximity to the operation unit 112 (touchless sensor 115) and is stationary for a predetermined time, the light source 114 is turned off.

  FIG. 40 is a schematic diagram illustrating an example of touchless light control. As shown in FIG. 40, when the user's hand or finger is moved close to the operation unit 112 (touchless sensor 115), the control unit 116 is moved in a predetermined direction (left-right direction in FIG. 40). In addition, dimming control of the light source 114 according to the direction is performed. For example, when the user's hand or finger is moved close to the operation unit 112 (touchless sensor 115) and moved in the first direction (from right to left in FIG. 40), the light amount of the light source 114 is increased, Conversely, when the light source 114 is moved in the second direction (from left to right in FIG. 40), the light amount of the light source 114 is decreased.

  It is desirable that the first direction for instructing the light intensity increase and the second direction for instructing the light intensity decrease are set in opposite directions. By making such settings, the user can intuitively understand the direction in which his / her hand or finger should be moved when the light amount is increased / decreased.

  In addition, the above dimming control may be configured such that the amount of light of the light source 114 is changed one step each time a hand or finger movement is detected, or that the movement of the hand or finger is detected. As a trigger, the light amount of the light source 114 is continuously increased or decreased. After the hand or finger is once released from the operation unit 112 (touchless sensor 115), the light source 114 approaches the operation unit 112 (touchless sensor 115) again. It is good also as a structure which stops the light quantity change of the light source 114 by making this a trigger. When the latter configuration is adopted, it is only necessary to determine whether the light amount of the light source 114 is continuously increased or decreased according to which direction the hand or finger is moved.

  FIG. 41 is a schematic diagram showing an example of touchless toning control. As shown in FIG. 41, when the user's hand or finger is moved close to the operation unit 112 (touchless sensor 115), the control unit 116 is moved in a predetermined direction (the front-rear direction in FIG. 41). In addition, the toning control of the light source 114 according to the direction is performed. For example, when the user's hand or finger is moved close to the operation unit 112 (touchless sensor 115) and moved in the third direction (from the back to the front in FIG. 41), the color temperature of the light source 114 is increased. On the contrary, when it is moved in the fourth direction (in FIG. 41, from the front to the back), the color temperature of the light source 114 is lowered.

  It is desirable that the third direction for instructing the color temperature increase and the fourth direction for instructing the color temperature decrease are set in opposite directions. By performing such settings, the user can intuitively understand the direction in which his / her hand or finger should be moved when the color temperature is increased / decreased.

  Further, the first direction and the second direction for instructing dimming control (light amount up / down) and the third direction and the fourth direction for instructing toning control (color temperature up / down) are: It is desirable to set them in an orthogonal relationship. By performing such settings, the user can clearly distinguish between the light control and the color control.

  In addition, the above-described toning control may be configured such that the color temperature of the light source 114 is changed by one step each time a hand or finger movement is detected, as in the above-described toning control. Triggered by the detection of finger movement, the color temperature of the light source 114 is continuously increased or decreased. After the hand or finger is once released from the operation unit 112 (touchless sensor 115), the operation is performed again. The color temperature change of the light source 114 may be stopped using the proximity of the unit 112 (touchless sensor 115) as a trigger. When the latter configuration is adopted, it may be determined whether the color temperature of the light source 114 is continuously increased or decreased according to which direction the hand or finger is moved.

<Application to office lighting>
FIG. 42 is a schematic diagram showing an application example to office lighting. As shown in FIG. 42, when the linear lighting device 100 is provided on the desks A to D arranged in a line, the housing of the lighting device 100 is formed in a form corresponding to the desks A to D. 110 is divided into four sections 110A to 110D, and touchless sensors 115A to 115D are provided for the respective sections so that lighting / lighting control, dimming control, and toning control can be individually performed for each section. It is desirable to build a system. By setting it as such a structure, it becomes possible to perform drive control of the illuminating device 100 arbitrarily according to the seating condition for every desk AD and a user's preference.

  Unlike the task light with an arm shown in FIG. 37, the touchless sensor 115 is installed in the vicinity of the arm mounting portion 113 in the case of the lighting device 100 in which the housing 110 is installed on the lower surface of the ceiling or hanging cabinet. Therefore, for example, as shown in FIG. 43, a plurality of light sources 114 arranged in a row can be divided into two blocks, and a touchless sensor 115 can be provided at an intermediate position.

<Application to ceiling lighting>
FIG. 44 is a schematic diagram showing an application example to ceiling lighting. As shown in FIG. 44, when the lighting device 100 is used as ceiling lighting, it is desirable to separate the touchless sensor 115 from the housing 110 and attach it to a range (such as a wall surface) that can be reached by the user. With such a configuration, as described above, it is possible to perform drive control without touching the illumination device 100 installed on the ceiling. As a signal transmission path from the touchless sensor 115 provided on the wall surface to the control unit 116 (not shown in FIG. 44) provided in the housing 110, either wired or wireless may be used.

<Touchless sensing method>
In the above description, the touchless sensor 115 has been described by taking as an example a configuration using the semiconductor device 1 described above (including the externally attached infrared sensors 31 to 33). However, the present invention is not necessarily limited to this. For example, a configuration in which an image recognition process is performed using an image sensor may be employed.

<LED lighting system>
45, 46, and 53 show an example of an LED lighting system. The LED illumination system XC of this embodiment includes a plurality of LED illumination devices XB, a camera unit 270, and face recognition control means 207. 45 and 46, the face recognition control means 207 is omitted for convenience of understanding. For example, as shown in FIGS. 45 and 46, the LED lighting system XC is suitable for a reader Vw to browse a book at the reading desk XD in a library in which a plurality of archives Ac and reading desks XD are arranged. Provide brightness. In the present embodiment, the LED illumination system XC has a function of illuminating the top plate XDa of the browsing desk XD and a function of illuminating the ceiling W directly above the browsing desk XD. As shown in FIG. 45, the LED illumination system XC includes three LED illumination devices XB and three camera units 270. Each LED illumination device XB and each camera unit 270 are paired with each other.

  As shown in FIG. 47, the LED illumination device XB includes a plurality of LED units XA1, XA2 and a support cover 201. For example, as shown in FIGS. 45 and 46, the LED illumination device XB is arranged on the upper part of the browsing table XD, and is configured to illuminate the ceiling W and the top surface XDa of the browsing table XD.

  The support cover 201 has an elongated cylindrical shape as a whole, and is attached to the upper part of the browsing desk XD in a posture in which the x direction is the longitudinal direction, as shown in FIGS. 45 and 46. 47 and 48, the support cover 201 includes a pair of arc portions 211 and a pair of middle plate portions 212. The pair of arc portions 211 correspond to a part of the same circle and are separated from each other in the y direction. The arc portion 211 is expected to prevent the light from the LED unit XA1 from leaking in an unintended direction and to make the appearance of the LED lighting device XB have a smart impression. Each middle plate portion 212 extends in the y direction from each arc portion 211 toward the center of the same circle. The middle plate portion 212 is a portion that supports the LED units XA1 and XA2.

  The LED units XA1 and XA2 have the same configuration. As shown in FIG. 49, the substrate 202, a plurality of LED modules 203, a support member 204, a cover 205, and first and second power supply units 206A and 206B. It has. Furthermore, one of the plurality of LED units XA1 and XA2 provided in the LED lighting device XB includes a wireless slave unit 281 (see FIG. 53). The LED units XA1 and XA2 are elongated and extend in the x direction, and are units that perform the light emitting function of the LED lighting device XB. In the present embodiment, the LED units XA1 and XA2 have an x-direction dimension of 1227 mm, a y-direction dimension of 33 mm, and a z-direction dimension of 30 mm. In the LED illumination device XB, as shown in FIGS. 47 and 48, a plurality of LED units XA2 are arranged in two rows parallel to each other in the z direction, and a plurality of LED units XA1 are arranged in the lower side in the z direction. Is arranged. The upper two rows of LED units XA2 illuminate the ceiling W in FIGS. 45 and 46, and the lower one row of LED units XA1 illuminates the top surface XDa of the viewing desk XD.

  As shown in FIGS. 49 and 50, the substrate 202 has a belt-like shape in which the x direction is the longitudinal direction and the y direction is the width direction, and is made of, for example, glass epoxy resin. In the present embodiment, the substrate 202 has an x-direction dimension of 204 mm and a y-direction dimension of 30 mm, and six LED boards 202 are provided in one LED unit XA1, XA2. On one substrate 202, 288 LED modules 203 are mounted. In order to supply power to these LED modules 203 to be described later, the substrate 202 is a laminated substrate. As shown in FIG. 50, the adjacent substrates 202 are arranged close to each other so that the end surfaces in the x direction hardly cause a gap. Wiring patterns (not shown) formed on adjacent substrates 202 are connected to each other by wiring 221.

  The plurality of LED modules 203 are modules serving as light sources of the LED units XA1 and XA2, and are arranged in two rows on the substrate 202 as shown in FIG. In the present embodiment, the plurality of LED modules 203 is constituted by an LED module 203A and an LED module 203B. The LED modules 203A and 203B have different wavelengths of emitted light. For example, the LED module 203A emits a so-called day-white color having a color temperature of about 5,000K, and the LED module 203B has a so-called light bulb having a color temperature of about 3,000K. Emits color. As shown in the partial enlarged view on the left side of FIG. 50, the LED modules 203A and the LED modules 203B are alternately arranged in the x direction. Further, for example, in the part shown in the partial enlarged view on the right side of FIG. 50, the LED module 203B is mounted on the right end of the left substrate 202 in the figure, and the LED module 203B is mounted on the left end of the right substrate 202 in the figure. A module 203A is mounted. Thereby, LED module 203A, 203B is alternately arrange | positioned in the x direction in LED unit XA1 whole. In the LED unit XA1, 432 LED modules 203A and LED modules 203B are mounted, and a total of 864 LED modules 203 are used. The LED modules 203A and 203B have a plan view dimension of about 4.0 mm × 2.0 mm. Note that, unlike such a configuration, a configuration including only the LED module 203 that emits light of a single wavelength may be employed.

  As shown in FIG. 51, the LED modules 203A and 203B include a pair of leads 231, an LED chip 232, a sealing resin 233, and a reflector 234. The pair of leads 231 is made of, for example, a Cu alloy, and the LED chip 232 is mounted on one of them. A surface of the lead 231 opposite to the surface on which the LED chip 232 is mounted is a mounting terminal 231a used for surface mounting the LED module 203. The LED chip 232 is a light source of the LED module 203 and can emit blue light, for example. The sealing resin 233 is for protecting the LED chip 232. The sealing resin 233 is formed using a light-transmitting resin including a fluorescent material that emits yellow light when excited by light from the LED chip 232. The configuration of the sealing resin 233 is different between the LED module 203A and the LED module 203B. Due to this difference, a daylight white color is emitted from the LED module 203A, and a light bulb color is emitted from the LED module 203B. As said fluorescent substance, it may replace with what emits yellow light, and may mix and use what emits red light, and what emits green light. The reflector 234 is made of, for example, white resin, and reflects light emitted from the LED chip 232 to the side.

  As shown in FIG. 49, the support member 204 is made of aluminum, for example, and has a U-shaped cross section having a bottom 241, two side plate portions 242, and two pressing plates 246. A substrate 202 is attached to the outside of the bottom portion 241. In the present embodiment, the bottom portion 241 and the substrate 202 have substantially the same y-direction dimension. Locking grooves 243 and 244 are formed in the two side plate portions 242. The locking grooves 243 and 244 extend in the x direction and are recessed inward in the y direction. The two pressing plates 246 are attached to the lower end of the side plate portion 242.

  As shown in FIG. 47, the cover 205 has a strip shape with an arc cross section extending in the x direction, and is made of, for example, milky white resin that diffuses and transmits light from the LED module 203. As shown in FIG. 49, locking pieces 251 and 252 are formed at both ends of the cover 205. The locking pieces 251 and 252 both extend in the x direction and protrude inward in the y direction. The locking piece 251 is engaged with the locking groove 243, and the locking piece 252 is engaged with the locking groove 244.

  The power supply units 206A and 206B include a case 261, a power supply board 262, and a plurality of electronic components 263, and are accommodated in the support member 204. The case 261 has a U-shaped cross section, and is made of metal, for example. A power supply board 262 is attached to the case 261. As shown in FIG. 52, the power supply board 262 has a long rectangular shape, and a plurality of electronic components 263 are mounted thereon. The plurality of electronic components 263 are, for example, a capacitor 263a, a diode 263b, a circuit protection element 263c, a driver IC 263d, a coil 263e, a resistor 263f, for example, a transistor 263g made of a power MOSFET. A connector (not shown) extends from the power supply units 206A and 206B. As shown in FIG. 49, the power supply units 206 </ b> A and 206 </ b> B are fixed to the support member 204 by the respective cases 261 being pressed by the pressing plate 246. The holding plate 246 and the case 261 are coupled by, for example, a bolt (not shown).

  In the present embodiment, two power supply units 206A and 206B are provided in each LED unit XA1 and XA2. Each power supply unit 206A supplies power to 216 LED modules 203A, and each power supply unit 206B supplies power to 216 LED modules 203B. Each LED module 203 is supplied with DC power having a maximum voltage of about 3 V and a current of about 20 mA, for example.

  The wireless slave unit 281 is a wireless communication device having a physical layer according to, for example, the IEEE 802.15.4 standard. In the present embodiment, the wireless slave unit 281 has a configuration in which components (not shown) such as electronic components and a board are built in a rectangular parallelepiped case. For example, the support member 204 of the LED units XA1 and XA2 and It is arranged at a position adjacent to the cover 205 in the x direction.

  As shown in FIG. 53, the LED lighting system XC further includes a wireless master device unit 282. The wireless master unit 282 is a wireless communication device having a physical layer according to, for example, IEEE 802.15.4 standard, and is configured to be able to perform wireless communication with the wireless slave unit 281. The wireless master unit 282 can be connected to a personal computer PC as data input means. From the personal computer PC, for example, the brightness and hue of the LED lighting device XB for one year are input separately for each date and time. Wireless base unit 282 stores the data in a built-in memory (not shown).

  From the wireless master device 282, a light emission amount instruction wireless signal is transmitted to each LED lighting device XB based on the brightness and hue of each date. When the wireless slave unit 281 of each LED lighting device XB receives the light emission amount instruction wireless signal, it transmits the light emission amount instruction signal to the power supply units 206A and 206B. The light emission amount instruction signal is, for example, a pulse waveform signal having a voltage of 5 V, and instructs the light emission time rates of the LED modules 203A and 203B that emit light by the power supply units 206A and 206B. Thus, so-called PWM control is performed on the LED modules 203A and 203B in accordance with the light emission amount instruction radio signal.

  For example, when a certain LED illumination device XB is desired to emit white light, a light emission amount instruction signal for setting the light emission time rate of the LED module 203A to 100% is transmitted to the power supply unit 206A, and the light emission time rate of the LED module 203B is set to 0%. Is transmitted to the power supply unit 206B. On the other hand, when it is desired to cause a certain LED lighting device XB to emit light bulb color, a light emission amount instruction signal for setting the light emission time rate of the LED module 203A to 0% is transmitted to the power supply unit 206A, and the light emission time rate of the LED module 203B is set to 100%. Is transmitted to the power supply unit 206B. By such PWM control, the hue of the light emitted by the LED illumination device xB (LED units XA1, XA2) can be freely adjusted between the neutral white color and the light bulb color. In the present embodiment, the illuminance adjustment and the lighting / extinguishing control by the light emission amount instruction radio signal are performed only for the LED unit XA2. As will be described later, priority is given to the control by the face recognition control means 207 in the on / off control for the LED unit XA1.

  In this embodiment, one wireless slave unit 281 is provided in one LED lighting device XB. This means that the plurality of LED units XA1 and XA2 provided in one LED lighting device XB emit light with the same color and the same illuminance. In contrast, by providing a plurality of wireless slave units 281 in one LED lighting device XB, the color tone of the LED unit XA1 and the LED unit XA2 can be made different from each other. Further, instead of the wireless communication by the wireless slave unit 281 and the wireless master unit 282, the color tone of the LED lighting device XB may be adjusted by wired communication. Furthermore, it is good also as a structure which does not have the function to adjust a color tone.

  As shown in FIGS. 45 and 46, the camera unit 270 is attached to the browsing table XD and images a specific imaging area Sa. In the present embodiment, the camera unit 270 is installed behind the top XDa in the y direction so that the face Fc of the viewer Vw with the specific imaging area Sa sitting on the browsing desk XD can be properly captured. Even the posture that faces diagonally upward. As shown in FIG. 53, the camera unit 270 is connected to the face recognition control means 207, and image data obtained by photographing is sent to the face recognition control means 207.

  The face recognition control unit 207 includes an image processing unit 271 and a control unit 272. The image processing unit 271 performs face recognition processing on the image data sent from the camera unit 270. As an example of the outline of face recognition processing, binarization processing is performed on image data having color or monochrome gradation. Next, contour extraction processing is performed on the binarized data. Then, the eyes included in the face Fc are extracted by collating with the stored shape database. Whether the face Fc is included in the image or whether the face Fc faces the camera unit 270 is determined based on the obtained eye shape, size, and arrangement of the two eyes. However, the face recognition process described above is merely an example, and various forms of face recognition processes can be employed.

  The control unit 272 functions to control the lighting state of the LED unit XA1 of the LED lighting device XB based on the processing result of the image processing unit 271, and includes, for example, a CPU, a memory, and an interface. FIG. 53 shows a configuration in which one LED unit XA1 is controlled by one camera unit 270 and face recognition control means 207 for convenience of explanation. The configuration shown in FIGS. 45 and 46 includes three LED units XA1, and each LED unit XA1 has an individual face based on the image of the individual camera unit 270 in the same manner as the configuration shown in FIG. Lighting control is performed by the recognition control means 207. An example of the lighting state control of the LED unit XA1 by the control unit 272 will be described below with reference to FIGS. The control unit 272 controls the lighting state of the LED unit XA1 depending on whether or not the face Fc of the viewer Vw is directly facing the image Img. Specifically, the LED unit XA1 is turned on when the face Vc of the viewer Vw is directly facing, and the LED unit XA1 is turned off when the face Fc of the viewer Vw is not facing.

  FIG. 54 shows a state in which the viewer Vw is walking between the library Ac and the browsing desk XD. In this case, the image Img of the camera unit 270 shows the viewer Vw viewed from the side. When this image Img is image-processed by the image processing unit 271, it is not determined that the face Fc of the viewer Vw is directly facing the camera unit 270. Therefore, the LED unit XA1 is turned off.

  FIG. 55 shows a state in which the viewer Vw stands facing the browsing desk XD. In this case, the upper body of the viewer Vw is shown in the image Img. When this image Img is image-processed by the image processing unit 271, it is determined that the face Fc of the viewer Vw is directly facing. Therefore, the LED unit XA1 is turned on.

  FIG. 56 shows a state where the viewer Vw stands facing the library Ac. In this case, the image Img of the camera unit 270 shows the viewer Vw viewed from behind. When this image Img is image-processed by the image processing unit 271, it is not determined that the face Fc of the viewer Vw is directly facing the camera unit 270. Therefore, the LED unit XA1 is turned off. For example, when the state shown in FIG. 55 is changed to the state shown in FIG. 56, the LED unit XA1 is changed from the on state to the off state. The control unit 272 may be provided with a turn-off timer function that allows a certain period of time to elapse after the image processing unit 271 determines that the face Fc is not directly facing until the LED unit XA1 is turned off.

  FIG. 57 shows a state where the viewer Vw is sitting on the browsing desk XD and browsing a book. In this case, the face Fc of the viewer Vw appears relatively large in the image Img. When this image Img is image-processed by the image processing unit 271, it is determined that the face Fc of the viewer Vw is directly facing. Therefore, the LED unit XA1 is turned on.

  FIG. 58 shows a state where the viewer Vw is seated at a position slightly away from the browsing desk XD. For example, the case where the viewer Vw browses a book with a relatively relaxed posture corresponds to this state. In this case, the face Fc of the viewer Vw appears relatively small in the image Img. When this image Img is image-processed by the image processing unit 271, it is determined that the face Fc of the viewer Vw is directly facing. Therefore, the LED unit XA1 is turned on.

  FIG. 59 shows a state where the viewer Vw is sitting facing the library Ac. In this case, the back of the viewer Vw appears in the image Img of the camera unit 270. When this image Img is image-processed by the image processing unit 271, it is not determined that the face of the viewer Vw is facing the camera unit 270. Therefore, the LED unit XA1 is turned off. As described above, a certain period of time may elapse until the controller 272 performs the extinguishing timer function.

  FIG. 60 shows a state where the viewer Vw does not exist. In this case, the viewer Vw is not shown at all in the image Img of the camera unit 270. Even if this image Img is image-processed by the image processing unit 271, it is not determined that the face Fc of the viewer Vw is facing the camera unit 270. Therefore, the LED unit XA1 is turned off.

  FIG. 61 shows a state in which the luggage Lg is placed on the top plate XDa of the reading desk XD. In this case, only the luggage Lg appears in the image Img of the camera unit 270, and the viewer Vw does not appear. Even if this image Img is image-processed by the image processing unit 271, it is not determined that the face Fc of the viewer Vw is facing the camera unit 70. Therefore, the LED unit XA1 is turned off.

  Next, the operation of the LED lighting system XC will be described.

  According to the present embodiment, the LED unit XA1 that illuminates the top plate XDa of the browsing desk XD can be appropriately lit when the viewer Vw needs brightness, and the viewer Vw can increase the brightness. It can be turned off when not needed. For this reason, it is possible to promote power saving by providing an environment in which the viewer Vw can browse comfortably and not consuming unnecessary power. In particular, when a plurality of reading desks XD are arranged, it is appropriately avoided that the LED unit XA1 for illuminating the reading desk XD adjacent to the reading desk XD facing the viewer Vw is illuminating inappropriately. Is possible.

  For example, as a comparative example, a pyroelectric sensor that detects body temperature, a reflective infrared sensor, a cut-off infrared sensor, and an LED illumination system that includes a lighting and extinguishing control function using an ultrasonic distance sensor. When these sensors are used, the LED unit XA1 is unduly lit even when the viewer Vw is not facing the viewing desk XD as shown in FIGS. In addition, there is a possibility that the top plate XDa of the browsing desk XD that is not facing the viewer Vw, such as the browsing desk XD next to the browsing desk XD that is facing the browsing person Vw, is wasted. Furthermore, in the case of a configuration having a turning-on / off control function using a reflection-type infrared sensor, a blocking-type infrared sensor, and an ultrasonic distance sensor, a simple object such as a luggage Lg is present in the specific imaging area Sa as shown in FIG. Even if it does, there is a problem that the LED unit XA1 is turned on. According to the LED lighting system XC of the present embodiment, it is possible to eliminate problems that may occur in these configurations.

  By controlling the LED modules 203A and 203B based on the light emission time rate, it is possible to arbitrarily set the hue of light emitted from the LED units XA1 and XA2 between a neutral white color and a light bulb color. Similarly, the luminance of the LED unit XA2 can be arbitrarily set between 0 and the maximum light amount. As a result, the ceiling W can be illuminated with light having a hue and brightness required depending on the installation location and date and time.

  Since the daytime white LED module 203A and the light bulb color LED module 203B are alternately arranged in the x direction, it is possible to promote the color mixture of the light emitted from the LED modules 203A and 203B. As a result, it is possible to prevent the person who sees the LED units XA1, XA2 (LED lighting device XB) from recognizing the light part in the light bulb color shade and the light part in the day white shade separately. An appearance that emits light uniformly through 205 can be realized.

  By attaching the substrate 202 to the support member 204 made of aluminum having a relatively high thermal conductivity, heat from the LED modules 203A and 203B can be satisfactorily transmitted to the support member 204 via the substrate 202. It is. Since the support member 204 has a U-shaped cross section, its surface area is relatively large. This is advantageous for increasing the heat radiation efficiency. By improving the heat dissipation efficiency, it is possible to suppress the deterioration of the LED modules 203A and 203B.

  Although the LED units XA1 and XA2 have a simple and slender shape as a whole, they include LED modules 203A and 203B that are light sources, power supply units 206A and 206B that are power supply means, and the like. Therefore, the LED units XA1 and XA2 can be mounted on the support cover 201 with relatively various postures such as upward, downward, two rows, and one row. Thereby, the LED illumination device XB can illuminate the ceiling W and the top surface XDa of the office desk XD, and does not have a complicated shape as a whole, and has a clean appearance.

  According to the configuration including the wireless slave unit 281 and the wireless master unit 282, for example, there is no wiring trouble, and there are less restrictions on the installation location of the LED lighting device XB, as compared with a wired illumination system. There are advantages.

  However, the LED illumination system is not limited to the above-described embodiment. The specific configuration of each part of the LED lighting system can be changed in various ways.

<Combination of motion detection and face detection>
FIG. 62 is a schematic diagram showing an example of a combination of motion detection and face detection. Further, based on an office lighting system (see FIG. 42) provided with a touchless sensor 115 for realizing a motion detection function, a face is further shown. In this configuration, a camera unit 117 for realizing the detection function is added. In FIG. 62, a configuration in which the touchless sensor 115 and the camera unit 117 are provided at different positions is depicted, but the positions of both may be the same.

  As shown in FIG. 62, when the linear lighting device 100 is provided on the desks A to D arranged in a line, the housing of the lighting device 100 is formed in a form corresponding to the desks A to D. 110 is divided into four sections 110A to 110D, and touchless sensors 115A to 115D and camera units 117A to 117D are provided for the sections, respectively, and lighting / lighting control, dimming control, and toning control are performed for each section. It is desirable to build an office lighting system that can be performed individually. By setting it as such a structure, it becomes possible to perform drive control of the illuminating device 100 arbitrarily according to the seating condition for every desk AD and a user's preference.

  For example, on / off control for each of the sections 110A to 110D is performed according to face detection using the camera units 117A to 117D (whether or not the user is facing directly), while dimming control is performed for each of the sections 110A to 110D. For the toning control, a usage form in which the control is executed according to motion detection using the touchless sensors 115A to 115D (whether or not the user has performed a predetermined operation) can be considered.

  Even when the user is facing the desks A to D, there may be a case where the user's face cannot be photographed by the camera units 117A to 117D due to a luggage being placed on the desks A to D. In that case, it is also possible to perform on / off control for each of the sections 110A to 110D in accordance with motion detection using the touchless sensors 115A to 115D.

<Other variations>
The configuration of the present invention can be variously modified in addition to the above-described embodiment without departing from the spirit of the invention. That is, the above-described embodiment is an example in all respects and should not be considered as limiting, and the technical scope of the present invention is not the description of the above-described embodiment, but the claims. It should be understood that all modifications that come within the meaning and range of equivalents of the claims are included.

  Among various technical features disclosed in the present specification, the first technical feature is a mobile phone, a digital camera, a portable game machine, a digital audio player, a digital video camera, a car navigation system, a PDA [Personal Digital / Data Assistance], LCDs, medical devices (eg, hospital guidance devices that require prevention of indirect infections such as viruses), electronic devices (such as vending machines) that contact an unspecified number of people, and non-contact types such as lighting devices It can be suitably used as a technique for realizing a user interface.

DESCRIPTION OF SYMBOLS 1 Semiconductor device 1a, 54 Printed wiring board 1b Transparent resin 2 Proximity sensor 3,15 Control circuit 4 Pulse generator 5 Driver 6 Infrared light sensor 7,12 Amplifier 8,14 A / D converter 9 Linear / logarithmic converter 10 Illuminance Sensor 11 Visible light sensor 13, 40 Capacitor 20 Data register 21 Oscillator 22 Timing controller 23 Signal output circuit 24 Signal input / output circuit 25 Power-on reset circuit 34 Reflector 35 Visible light source 37-39 Resistive element 50 Mobile phone 51 Touch panel 52 Speaker 53 Microphone 55 Spacer 56 Transparent plate 57 Backlight T1 to T3 Drive terminal T4 Signal output terminal T5 Clock input terminal T6 Serial data input / output terminal T7 Power supply terminal T8, T9 Ground terminal T10 Test terminal α Infrared light β Visible light 1 00 Illuminating device 110 Housing 111 Light source holding unit 112 Operation unit 113 Arm mounting unit 114 Light source (LED)
115 Touchless sensor 116 Control unit (MCU)
117 Camera unit 120 Arm 130 Pedestal XA1, XA2 LED unit XB LED illumination device XC LED illumination system XD Desk XDa Top plate Ac Library W Ceiling Sa Specific imaging area Vw Viewer Fc Face x (first) direction y (third) ) Direction z (second) direction 201 support cover 211 arc portion 212 middle plate portion 213 shielding bracket 215 support plate 202 substrate 203 LED module 203A (first) LED module 203B (second) LED module 231 lead 231a mounting Terminal 232 LED chip 233 Sealing resin 234 Reflector 204 Support member 241 Bottom 242 Side plate 243, 244 Locking groove 245 Holder 246 Presser plate 205 Cover 251 252 Locking piece 206A (first) power supply 2 6B (second) power supply unit 261 casing 262 power supply board 263 electronic component 263a capacitor 263b diode 263c safety element 263d driver IC
263e Coil 263f Resistor 263g Transistor 207 Face recognition control means 271 Image processing part 272 Control part 270 Camera unit (photographing means)
281 Wireless handset unit 282 Wireless handset unit

Claims (5)

An LED unit with a light source;
A state recognition unit capable of recognizing the state of the object;
A control unit for controlling the state of the light source light emitted from the light source based on the state of the object recognized by the state recognition unit;
A first wireless communication unit that performs wireless communication with respect to the state of the light source light;
An LED illumination system comprising: A plurality of the LED unit and the first wireless communication unit;
The LED lighting system according to claim 1, wherein the plurality of first wireless communication units are provided in each of the plurality of LED units. A controller for recognizing lightness per unit time and transmitting a light emission amount instruction wireless signal for adjusting the light source light based on the lightness from the second wireless communication unit to the first wireless communication unit;
The LED illumination system according to claim 1, wherein the state of the light source light is adjusted based on the light emission amount instruction radio signal. The LED unit is
An LED module emitting the light source light;
A power supply unit that PWM-controls the state of the light source light emitted by the LED module based on the control of the control unit;
The LED illumination system according to claim 3, comprising:   5. The LED illumination system according to claim 4, wherein the power supply unit performs PWM control of the state of the light source light based on the light emission amount instruction radio signal.