JP2007153032A - Light control system, vehicle and integrated circuit device - Google Patents

Abstract

A light control system capable of automatically controlling at least one of a light direction, a light amount, and an irradiation angle of a moving body.
The light control system detects an angular velocity of a moving body, outputs an analog voltage value corresponding to the rotational angular velocity, receives an analog voltage value output from the angular velocity sensor, and receives a digital voltage. An analog processing circuit 30 that converts the value into a value and outputs the digital voltage value output from the analog processing circuit, and controls at least one of the light direction, the light amount, and the irradiation angle of the moving body based on the digital voltage value. A light control information generation unit 40 for generating light control information for the purpose.
[Selection] Figure 1

Description

  The present invention relates to a light control system, a vehicle, and an integrated circuit device.

  A gyro is a sensor that measures the speed of rotation (rotational angular velocity) with respect to a rotational motion around a certain rotational axis. The “vibration gyro sensor” that is widely used today detects the angular velocity using the “Coriolis force”.

  For example, in a vibrating gyroscope that operates using the piezoelectric effect, when an AC voltage is applied to a gyro element (vibrating body such as a crystal), a Coriolis force is generated, and a current is generated according to the rotation rate and angular velocity. The current signal is amplified inside the gyro sensor, and a voltage proportional to the angular velocity is output.

  Recently, an ultra-small and low power consumption gyro sensor has been developed, packaged together with an analog front-end circuit and an A / D conversion circuit, mounted on a mobile phone, a digital camera, etc., and used for camera shake correction and the like.

There is also a system that performs navigation by mounting a gyro sensor or the like on a moving body.
JP 2004-279373 A

  Here, many of the lights of the vehicle (moving body) are fixed in a certain direction, and there are cases where the light does not hit a sharp curve.

  The inventor of the present application is convenient and effective for self-prevention if the direction of the light, the amount of light, and the irradiation angle can be automatically adjusted so that the direction of turning when the vehicle passes a tight curve can be clearly seen. Thought.

  The present invention has been made in view of the technical problems as described above, and an object of the present invention is to automatically control at least one of the light direction, the light amount, and the irradiation angle of the moving body. A light control system and an integrated circuit device are provided.

(1) The present invention
A light control system for a moving object,
An angular velocity sensor that detects the rotational angular velocity of the moving body and outputs an analog voltage value corresponding to the rotational angular velocity;
An analog processing circuit that receives an analog voltage value output from the angular velocity sensor, converts it to a digital voltage value, and outputs it;
A light control information generation unit that receives a digital voltage value output from the analog processing circuit and generates light control information for controlling at least one of the light direction, light amount, and irradiation angle of the moving body based on the digital voltage value When,
It is characterized by including.

  The moving body is, for example, a vehicle such as a car or a train, a vehicle moving on land, sea, or sky such as a ship or an airplane. The light of the moving body is a light provided in front of the moving body to illuminate the moving path of the moving body.

  For example, in the case of a car, an auxiliary (fog) lamp may be used.

  The angular velocity sensor measures a rotational speed (rotational angular velocity) with respect to a rotational motion around a certain rotational axis and outputs an analog voltage value corresponding to the rotational angular velocity. For example, the angular velocity sensor may be a gyro sensor. Here, the type of gyro is arbitrary.

  The analog processing circuit is, for example, an analog front-end circuit, and may include a low-pass filter, an operational amplifier, an A / D converter, and the like.

  The control information generation unit may be realized, for example, by causing a CPU or a microcomputer including the CPU to execute a predetermined program, or may be realized as a dedicated circuit.

  By mounting the light control system of this embodiment or a portion corresponding to the angular velocity sensor on a moving body such as a vehicle, the angular velocity sensor outputs a voltage value corresponding to the angular velocity in accordance with a change in the moving direction or direction of the moving body. .

  According to the present invention, when the absolute value of this voltage is large, it is estimated that the moving body is moving in a steep curve, and the direction of the light, the amount of light, and the irradiation angle are suitable for a sharp curve. Since at least one can be automatically adjusted, it is convenient and effective in preventing accidents.

(2) The light control system of the present invention
The light control information generation unit
It is characterized by receiving speed information of the moving body and generating light control information for controlling at least one of the light direction, the light amount, and the irradiation angle of the moving body based on the speed information and the digital voltage value.

  You may make it receive the speed information of a moving body from a speed display system (meter), for example.

  According to the present invention, the angular velocity information (indicating the tightness of the curve) can be used to automatically adjust at least one of the direction of the light, the amount of light, and the irradiation angle in consideration of the speed of the moving body. Accordingly, the light can be controlled more finely.

(3) The light control system of the present invention
The light control information generation unit
The digital voltage value output from the analog processing circuit is received, the digital voltage value is compared with the reference data, and write control information indicating whether or not to perform the write control is generated based on the comparison result.

(4) The light control system of the present invention includes:
The light control information generation unit
Including an upper reference data holding unit,
The received digital voltage value is compared with the upper limit reference data to determine whether or not the digital voltage value exceeds the upper limit reference data. It is characterized by generating information.

(5) The light control system of the present invention includes:
The light control information generation unit
When the received digital voltage value is smaller than the predetermined reference data, for changing at least one of the light direction, the light amount, and the irradiation angle of the moving body continuously or stepwise according to the value of the digital voltage value Write control information is generated.

(6) The present invention
A vehicle including a light control information generation unit described above and a light capable of changing at least one of a direction, a light amount, and an irradiation angle,
And a light control unit that changes at least one of a light direction, a light amount, and an irradiation angle based on the light control information generated by the light control information generation unit.

(7) The present invention
An integrated circuit device including a CPU and functioning as any one of the write control information generation units described above when the CPU executes a predetermined microprogram.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. Also, not all of the configurations described below are essential constituent requirements of the present invention.

  FIG. 1 is a diagram for explaining the configuration of the light control system of the present embodiment.

  The light control system 10 (in a narrow sense and in a broad sense) of the present embodiment includes an angular velocity sensor (gyro) 20. The angular velocity sensor 20 measures the rotational speed (rotational angular velocity) with respect to a rotational motion around a certain rotational axis, and outputs an analog voltage value 22 corresponding to the rotational angular velocity. The angular velocity sensor 20 may be a gyro sensor, for example. The gyro may be, for example, a vibrating gyroscope that operates using the piezoelectric effect. In this type, when an AC voltage is applied to the gyro element (vibrating body such as a crystal), a Coriolis force is generated, and the current depends on the rotation rate and angular velocity. Occurs. The current signal is amplified inside the gyro sensor, and a voltage proportional to the angular velocity is output. In addition, the kind of gyroscope is arbitrary, For example, the gyro sensor which applied MEMS (micro eiectro mechanical system) technology may be sufficient.

  The light control system 10 (in a narrow sense and in a broad sense) according to the present embodiment includes an analog processing circuit (analog front end circuit) 30. The analog processing circuit (analog front-end circuit) 30 includes a low-pass filter / op-amp 32 and an A / D converter (A / D converter) 34, receives an analog voltage value 22, and outputs a corresponding digital voltage value 36. .

  The light control system 10 (in a narrow sense and in a broad sense) of the present embodiment includes a light control information generation unit 40.

  The light control information generation unit 40 receives a digital voltage value output from the analog processing circuit, and controls light control information for controlling at least one of the light direction, the light amount, and the irradiation angle of the moving body based on the digital voltage value. 43, 45 and 47 are generated.

  For example, if control is performed to change the light direction, light amount, and irradiation angle of the moving body to a predetermined state when the angular velocity of the vehicle (moving body) exceeds a predetermined threshold, the light control information 43, 45 and 47 may be, for example, 1-bit signals indicating on / off whether or not the digital voltage value exceeds a predetermined threshold value.

  For example, if the control is performed to change the direction of the light of the moving body, the amount of light, and the irradiation angle according to the change in the angular velocity of the vehicle (moving body) continuously or stepwise, The write control information 43, 45, 47 may be numerical information corresponding to a digital voltage value, for example.

  The light control information generation unit 40 receives the speed information 12 of the moving body, and based on the speed information 12 and the digital voltage value 36, the light control for controlling at least one of the light direction, the light amount, and the irradiation angle of the moving body. Information may be generated.

  The write control information generation unit 40 receives the digital voltage value 36 output from the analog processing circuit 30, compares the digital voltage value 36 with the reference data, and outputs a control signal for instructing the presence or absence of write control based on the comparison result. You may make it produce | generate.

  The write control information generation unit 40 includes an upper limit reference data holding unit, compares the received digital voltage value with the upper limit reference data, determines whether or not the digital voltage value exceeds the upper limit reference data, and rises. In some cases, light control information for instructing to perform predetermined light control may be generated.

  In addition, when the received digital voltage value 36 is smaller than the predetermined reference data, the light control information generation unit 40 determines at least one of the light direction, the light amount, and the irradiation angle of the moving body according to the value of the digital voltage value. You may make it produce | generate the light control information for changing continuously or in steps.

  The light control information generation unit 40 includes an orientation control information generation unit 42, a light amount control information generation unit 44, and an irradiation angle control information generation unit 46.

  The direction control information generation unit 42 receives the digital voltage value output from the analog processing circuit, and generates light control information 43 for controlling the direction of the light of the moving body based on the digital voltage value.

  The light amount control information generation unit 44 receives the digital voltage value output from the analog processing circuit, and generates light control information 46 for controlling the light amount of light of the moving body based on the digital voltage value.

  The irradiation angle control information generation unit 46 receives the digital voltage value output from the analog processing circuit, and generates light control information 47 for controlling the irradiation angle of the moving body based on the digital voltage value.

  Here, the write control information may be, for example, 1-bit on / off information or multi-bit numerical information.

  The light control system 100 (in a broad sense) of the present embodiment includes a light control unit 80. The light control unit 80 physically controls the light direction, light amount, and irradiation angle of the moving body based on the light control signal.

  Here, it is assumed that the light of the moving body is configured such that its direction, light amount, and irradiation angle can be changed.

  The light control unit 80 includes an orientation control unit 82, a light amount control unit 84, and an irradiation angle control unit 86.

  The direction control unit 82 physically controls the light direction of the moving object based on the light control signal 43.

  The light quantity control unit 84 physically controls the light quantity of the moving body based on the light control signal 45.

  The irradiation angle control unit 86 physically controls the light irradiation angle of the moving body based on the light control signal 47.

  The light control system in a narrow sense may be mounted on a moving body such as a vehicle, and the light control signal generated by the light control information generation unit may be output to the light control unit of the vehicle. In this case, the light of the vehicle is configured to be able to change the direction, the light amount, and the irradiation angle, and the light control unit 80 changes the direction, the light amount, and the irradiation angle of the vehicle light based on the received light control signal.

  FIG. 2 is a diagram for explaining the movement of the moving body (vehicle) and the rotational angular acceleration (output as a voltage value) output by a gyro mounted on the vehicle.

  Here, when it is assumed that the moving body 210 travels along the moving path 220 at a constant speed, the gyro is traveling on a virtual circumference having a radius of curvature r1 centered on C1 in the vicinity of A. The voltage corresponding to is output.

  Further, in the vicinity of B, since the vehicle runs on a virtual circle having a radius of curvature r2 centered on C2, the gyro outputs a voltage corresponding to the rotational angular velocity θ2.

  FIG. 3 is a diagram for explaining a digital voltage value received by the write control information generation unit. The light control information generation unit receives a digital voltage value obtained by converting a voltage value output from the angular velocity sensor (gyro) into a digital voltage value.

  The horizontal axis is time t, and the vertical axis is voltage V. When the moving body rotates clockwise about a predetermined axis, the voltage takes a positive value as shown in the section 250, and the moving body rotates counterclockwise about the predetermined axis. If so, the voltage assumes a negative value as shown in section 260.

  When the moving body (vehicle) moves along a movement route as indicated by 220 in FIG. 2, the light control unit receives a voltage value as shown in FIG. Here, it can be determined that the part having a high voltage value such as a has a steep curve in the moving path of the moving body.

  As described above, when the movement path (movement direction) draws a steep curve based on the output value of the gyro, and when the output value exceeds the threshold value, for example, control for adjusting the direction of the light is performed. It may be.

  270 is a right rotation threshold, and 280 is a left rotation threshold.

  The output value of the gyro corresponding to the vicinity of A in FIG. 2 is a, and the output value of the gyro corresponding to the vicinity of B is b. Therefore, for example, the absolute value of the output value of the gyro is compared with the absolute value of the left / right rotation threshold value, and if the absolute value of the output value of the gyro> the absolute value of the left / right rotation threshold value, the light direction is either left or right (the output value of the gyro It may be tilted to the right when is +, and to the left when the output value of the gyro is-.

  For example, in FIG. 3, since the portion A exceeds the right rotation threshold value, the light direction is controlled to be tilted to the right.

  4A and 4B are diagrams for explaining the control of the light direction of the moving body (vehicle).

  Here, in order to simplify the description, a description will be given by taking one light of the moving body (a virtual light assumed to be provided near the center of the front surface of the moving body) as an example.

  FIG. 4A is a diagram illustrating the state of the light when the moving body (vehicle) 210 is moving on the moving path 220 with a tight curve without controlling the direction of the light. 310 is a vector representing the direction of the light, and 320 is the light irradiation range.

  In particular, when the direction of the light is not controlled, the direction 310 of the light is the direction of the moving object at that time. However, when turning to the right while drawing a steep curve as shown at 220, the direction of the turn (from the traveling direction) It is preferable to irradiate light (from the right).

  Therefore, in this embodiment, as shown in FIG. 4B, when the rotational angular velocity detected by the gyro exceeds a predetermined threshold, the direction of the light is inclined to the right with respect to the normal direction 310. Control. For example, when the light is configured to be rotatable with respect to a predetermined axis (for example, the vertical axis of the vehicle), the direction of the light is controlled to rotate in the right direction.

  In addition, when approaching a steep curve, not only the direction of the light but also the light quantity of the light may be changed. That is, when the rotational angular velocity detected by the gyro exceeds a predetermined threshold value, the light amount of the light may be controlled to be increased.

  If a sharp curve is reached, the light irradiation angle may be changed.

  5A and 5B are diagrams for explaining the control of the light irradiation angle.

  FIG. 5A shows the light irradiation range 410 when the light irradiation angle α1 is normal, and FIG. 5B shows the case where the light irradiation angle α2 is larger than normal (α2> α2). A light irradiation range 410 ′ is shown.

  For example, when the rotational angular velocity detected by the gyro exceeds a predetermined threshold value, the light irradiation angle may be controlled to be increased as shown in FIG.

  By widening the light irradiation angle in this way, even when the mobile body makes a sharp curve and bends, the light can be emitted in the direction of bending (from the right in the traveling direction).

  FIG. 6 is a diagram illustrating an example of an algorithm for controlling the rotational angular velocity, the light direction, and the light amount, which is the output of the gyroscope in the present embodiment.

  When the rotational angular velocity that is the output of the gyro is large, control for tilting the direction of the light according to the direction of rotation and control for increasing the amount of light and the irradiation angle are performed (S1, S2).

  When the rotational angular velocity that is the output of the gyro is small, control that does not move the direction of the light and control that keeps the light quantity and irradiation angle of the light as usual are performed (S1, S3).

  The direction of the light, the amount of light, and the irradiation angle can be changed by setting a threshold value that defines an upper limit for the rotational angular velocity detected by the gyro, for example, when the rotational angular velocity detected by the gyro exceeds a predetermined threshold value. May change the direction of light, the amount of light, and the irradiation angle.

  Further, the direction of light, the amount of light, and the irradiation angle may be changed continuously or stepwise according to the change in the output value of the gyro. For example, the output value of the gyro, the light direction, the light amount, and the irradiation angle may be defined by a predetermined function, and the light direction, the light amount, and the irradiation angle may be changed continuously or stepwise according to the predetermined function.

  The light control unit receives the speed information of the moving body together with the rotational angular velocity that is the output value of the gyro, and calculates the traveling direction of the moving body based on the speed information and the digital voltage value (calculates the traveling direction of the moving body), You may make it control at least 1 of a light quantity and an irradiation angle.

  By defining the relationship between the rotational angular velocity and the direction of the light, the amount of light, the size of the irradiation angle, or the light control information for controlling these by a function, etc., and executing the function using the rotational angular velocity as a variable You may make it produce | generate the light control information according to an algorithm.

  Also, prepare table data that defines the rotation angular velocity, the direction of the light, the amount of light, the size of the irradiation angle, or the light control information for controlling these, and refer to the table data and follow the above algorithm. Write control information may be generated.

  FIG. 7 is a graph showing a rotation angular velocity detected by the gyro, a moving body velocity, and a light brightness control region.

  The vertical axis represents the rotational angular velocity detected by the gyro, the horizontal axis represents the speed of the moving object, and 510 represents the light brightness (light quantity) control region. The light brightness (light quantity) control area 510 is an area to which some positive control is applied as compared to the normal state when the rotational angular velocity detected by the gyro and the speed of the moving body are within the region. . The content of the control may be, for example, control of whether or not the light amount of the light is changed so that the light amount is changed to the maximum within the area 510, or the light amount of the light is changed according to the rotational angular velocity or the moving body speed. Control is also possible.

  The relationship between the rotational angular velocity, the speed of the moving object, and the light brightness control area shown in the graph of FIG. 7 is tabulated, and the light control signal generator generates the received digital voltage (rotational angular velocity detected by the gyro), horizontal The shaft may generate a light control signal for controlling the amount of light by referring to the table based on the speed of the moving body.

  Further, the relationship between the rotational angular velocity, the speed of the moving object, and the light brightness control area shown in the graph of FIG. 7 is expressed as a function, and the light control signal generation unit receives the received digital voltage (the rotational angular velocity detected by the gyro). The horizontal axis may generate a light control signal for controlling the amount of light by executing a function based on the speed of the moving body.

  In addition, the relationship between the rotational angular velocity, the speed of the moving object, and the light brightness control area shown in the graph of FIG. 7 is incorporated in the program, and the light control signal generation unit receives the received digital voltage (the rotational angular velocity detected by the gyroscope). ), The horizontal axis may generate a light control signal for controlling the light quantity of the light by executing a function of the receiving program with the speed of the moving body as a variable.

  FIG. 8 is a graph showing a rotation angular velocity detected by the gyro, a speed of the moving body, and a control region of the light direction.

  The vertical axis represents the rotational angular velocity detected by the gyro, the horizontal axis represents the speed of the moving object, and 520 represents the control area for the light direction. The light direction control region 520 is a region to which some positive control is applied as compared with the normal state when the rotational angular velocity detected by the gyro and the speed of the moving body are within the region. The content of the control may be, for example, control of whether or not the direction of the light is changed so that the amount of light is changed to the maximum within the area 520, or the direction of the light is changed according to the rotational angular velocity or the moving body speed. Control is also possible.

  The relationship between the rotational angular velocity, the speed of the moving object, and the light brightness control area shown in the graph of FIG. 8 is tabulated, and the light control signal generator generates the received digital voltage (rotational angular velocity detected by the gyro), horizontal The shaft may generate a light control signal for controlling the direction of the light by referring to the table based on the speed of the moving body.

  Further, the relationship between the rotational angular velocity, the speed of the moving object, and the light brightness control area shown in the graph of FIG. 8 is expressed as a function, and the light control signal generation unit receives the received digital voltage (the rotational angular velocity detected by the gyro). The horizontal axis may generate a light control signal for controlling the direction of the light by executing a function based on the speed of the moving body.

  Further, the relationship between the rotational angular velocity, the moving body velocity, and the light brightness control area shown in the graph of FIG. 8 is incorporated in the program, and the light control signal generation unit receives the received digital voltage (the rotational angular velocity detected by the gyroscope). ), The horizontal axis may generate a light control signal for controlling the direction of the light by executing a function of the receiving program with the speed of the moving body as a variable.

  The light control unit receives the speed information of the moving body together with the rotational angular velocity that is the output value of the gyro, and calculates the traveling direction of the moving body based on the speed information and the digital voltage value (calculates the traveling direction of the moving body), You may make it control at least 1 of a light quantity and an irradiation angle.

  FIG. 9 is a diagram illustrating an example of an algorithm for controlling the rotational angular velocity, the speed of the moving body, the light direction, and the light amount, which are the outputs of the gyroscope in the present embodiment.

  When the rotational angular velocity that is the output of the gyro is large, control for tilting the direction of the light according to the direction of rotation regardless of the speed of the moving body and control for increasing the amount of light and the irradiation angle are performed (S11, S12).

  When the rotational angular velocity, which is the output of the gyro, is low and the moving body is high, control for tilting the direction of the light is not performed and control for increasing the light amount and the irradiation angle is performed (S11, S13, S14).

  When the rotational angular velocity, which is the output of the gyro, is low and the speed of the moving body is low, control for inclining the direction of the light is not performed, and control for increasing the light quantity and irradiation angle of the light is not performed (S11, S13). , S15).

  Note that the direction of the light, the amount of light, and the irradiation angle can be changed by, for example, setting a threshold value that defines an upper limit for the rotational angular velocity detected by the gyroscope and the moving body speed, and the rotational angular velocity detected by the gyroscope or the moving body. If the speed of the light exceeds a predetermined threshold, the direction of the light, the amount of light, and the irradiation angle may be changed.

  Further, the direction of the light, the amount of light, and the irradiation angle may be changed continuously or stepwise according to changes in the output value of the gyro and the speed of the moving body. For example, the output value of the gyroscope, the speed of the moving object, the direction of the light, the amount of light and the irradiation angle are defined by a predetermined function, and the direction of the light, the amount of light and the irradiation angle are changed continuously or stepwise according to the predetermined function. May be.

  The relationship between the rotational angular velocity and the speed of the moving body and the direction of the light, the amount of light, the size of the irradiation angle, or the light control information for controlling these is defined by a function, etc. By executing it, the write control information according to the above algorithm may be generated.

  In addition, table data defining light control information for controlling the rotational angular velocity, the speed of the moving body, the direction of the light, the size of the light amount, the size of the irradiation angle, or the control of these, and referring to the table data, Write control information according to the above algorithm may be generated.

  FIG. 10 is a diagram illustrating an example of a configuration of a control signal generation unit included in the write information generation unit.

  The control signal generation unit 50 receives the digital voltage value 36 output from the A / D converter 34, compares the digital voltage value 36 with the reference data, and generates a rotation angular velocity adjustment control signal 72 based on the comparison result. For example, it can be realized by a CPU or a microcomputer including a CPU.

  The control signal generation unit 50 includes a captured data holding unit 54, a reference data holding unit 52, and a comparison unit 56.

  The captured data holding unit 54 holds the input digital voltage value.

  The reference data holding unit 52 holds a reference voltage value serving as a comparison target and a threshold value.

  The comparison unit 56 receives the digital voltage value held in the captured data holding unit 54 and the reference voltage value held in the reference data holding unit 52, and generates a control signal 58 based on the comparison result between the two. The comparison unit 56 generates a control signal when, for example, digital voltage value> reference voltage value (for example, the control signal may be set to a first level (eg, H level), or voltage value <reference voltage value). In this case, a control signal may be generated (for example, the control signal is set to a first level (for example, H level)).

  Note that the control signal generation unit 50 may be configured to include a plurality of reference data holding units and a plurality of comparison circuits. Then, the values of each reference data holding unit and the values of the fetched data holding unit are compared by each comparison circuit to generate a plurality of control signals (control signals corresponding to each reference data based on the comparison results for each reference data). You may do it.

  Further, for example, the reference data holding unit 52 is configured as an upper limit reference data holding unit for holding a voltage value defining the upper limit reference data, and the digital voltage value received by the comparison unit 56 (value of the captured data holding 52 unit) Is compared with the upper limit reference data (the value of the reference data holding unit 52), and a control signal is generated when the digital voltage value exceeds the upper limit reference data (for example, the control signal is set to the first level (for example, H level)). You may do it.

  Further, the reference data holding unit 50 may be configured by a rewritable memory such as a flash memory or an EEPROM so that the reference data can be set in the rewritable memory based on an external input.

  FIG. 11 is a flowchart for explaining the flow of processing of the present embodiment.

  First, the rotational angular velocity is detected by the gyro sensor (step S21). The gyro sensor outputs an analog voltage value corresponding to the rotational angular velocity.

  Next, the analog processing circuit receives the analog voltage value output from the gyro sensor and converts it into a digital voltage value (step S22).

  The CPU inputs the digital voltage value and compares it with reference data (step S23).

  When the digital voltage value> the reference data (when the digital voltage value exceeds the reference data), control is performed so that the value of the control signal becomes the first level (for example, H level) (steps S24 and S25). .

  If the digital voltage value is not greater than the reference data, control is performed so that the value of the control signal becomes the second level (for example, L level) (steps S24 and S26).

  FIG. 12 is a flowchart illustrating an example of processing in which the light control unit controls the direction of the light based on the light control signal.

  It is determined whether or not the received control signal is at a first level (for example, H level). If the received control signal is at the first level (for example, H level), control is performed so that the direction of the light is tilted to the right or left. (Steps S31 and S32).

  Here, whether the light is tilted to the right or to the left is determined by whether the digital voltage value is positive or negative. Therefore, a control signal regarding whether the digital voltage value is positive or negative may be received.

  The light control information generation unit may output a signed value as control information, and the light control unit may determine whether to tilt the light to the right or to the left based on the sign of the control information. .

  In addition, this invention is not limited to this embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention.

The figure for demonstrating the structure of the light control system of this Embodiment. The figure for demonstrating the movement of a mobile body (vehicle), and the rotation angular acceleration (it outputs with a voltage value) which the gyro mounted in the vehicle outputs. The figure for demonstrating the digital voltage value which a write control information generation part receives. FIGS. 4A and 4B are diagrams for explaining the control of the light direction of the moving body (vehicle). FIGS. 5A and 5B are diagrams for explaining the control of the light irradiation angle. The figure which shows an example of the algorithm of control of the rotation angular velocity which is the output of the gyro in this Embodiment, the direction of a light, and light quantity. The graph which shows the control area of the rotational angular velocity which a gyro detects, the speed of a moving body, and the brightness of a light. The graph which shows the control area | region of the rotational angular velocity which a gyro detects, the speed of a moving body, and the direction of a light. The figure which shows an example of the algorithm of control of the rotation angular velocity which is the output of the gyroscope in this Embodiment, the speed of a moving body, the direction of light, and light quantity. The figure which shows an example of a structure of the control signal generation part contained in a write information generation part. The flowchart figure for demonstrating the flow of a process of this Embodiment. The flowchart figure which shows an example of the process which a light control part controls the direction of light based on a light control signal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light control system, 20 Angular velocity sensor, 22 Analog voltage value, 30 Analog signal processing circuit, 32 Analog front end circuit, 34 A / D converter, 36 Digital voltage value, 40 Light control information generation part, 42 Direction control information generation part , 43 Light direction control information, 44 Light amount control information generation unit, 45 Light amount control information, 46 Irradiation angle control information generation unit, 47 Light irradiation angle control information, 50 Control signal generation unit, 52 Reference data Holding unit, 54 Captured data holding unit, 56 Comparison unit, 80 Light control unit, 82 Direction control unit, 84 Light quantity control unit, 86 Irradiation angle control unit

Claims (7)

A light control system for a moving object,
An angular velocity sensor that detects the rotational angular velocity of the moving body and outputs an analog voltage value corresponding to the rotational angular velocity;
An analog processing circuit that receives an analog voltage value output from the angular velocity sensor, converts it to a digital voltage value, and outputs it;
A light control information generation unit that receives a digital voltage value output from the analog processing circuit and generates light control information for controlling at least one of the light direction, light amount, and irradiation angle of the moving body based on the digital voltage value When,
A light control system characterized by including. In claim 1,
The light control information generation unit
Light control characterized by receiving speed information of a moving body and generating light control information for controlling at least one of a light direction, a light amount, and an irradiation angle of the moving body based on the speed information and a digital voltage value system. In any one of Claims 1-2.
The light control information generation unit
A light control system that receives a digital voltage value output from an analog processing circuit, compares the digital voltage value with reference data, and generates write control information that indicates the presence or absence of light control based on the comparison result . In claim 3,
The light control information generation unit
Including an upper reference data holding unit,
The received digital voltage value is compared with the upper limit reference data to determine whether or not the digital voltage value exceeds the upper limit reference data. A light control system characterized by generating information. In any one of Claims 1 thru | or 4,
The light control information generation unit
When the received digital voltage value is smaller than the predetermined reference data, for changing at least one of the light direction, the light amount, and the irradiation angle of the moving body continuously or stepwise according to the value of the digital voltage value A light control system for generating light control information. A vehicle including a light control information generation unit according to any one of claims 1 to 5 and a light capable of changing at least one of direction, light amount, and irradiation angle,
A vehicle including a light control unit that changes at least one of a light direction, a light amount, and an irradiation angle based on light control information generated by a light control information generation unit.   6. An integrated circuit device comprising a CPU and functioning as a write control information generation unit according to claim 1 when the CPU executes a predetermined microprogram.

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