JP6377031B2 - Pulse light adjustment circuit - Google Patents

Description

  The present invention relates to a pulsed light adjustment circuit, and more particularly to a pulsed light adjustment circuit that allows an irradiated person to feel energy having waves.

  By irradiating light on the skin of the body, it is now quite prevalent to produce a benign reaction on the skin and achieve the effect of revitalizing the skin, and related medical lighting equipment is constantly being updated. The product is being developed. Among these, the effect of activating the skin by the illumination method is achieved by energy massage that makes the skin feel a wave by the irradiation method that becomes brighter or darker in the frequency band of the lighting equipment.

  However, in order to be able to feel the waves clearly, the most direct way is to increase the illuminance range by increasing the illuminance. However, all general lighting equipment uses light emitting diodes as lighting elements, and furthermore, the constant current that can be accepted by the light emitting diodes is limited. Therefore, in order to increase the illuminance range by increasing the illuminance, if the constant current value for driving the light emitting diode is continuously increased, the light emitting diode cannot withstand the load and is damaged once it exceeds the acceptable range. . In addition, since a plurality of various unused illuminances increase, it is generally necessary to employ a complicated circuit design, and there is a disadvantage that the production cost increases.

  Accordingly, it is possible to significantly increase the illuminance, but it is possible to maintain a constant current value within the acceptance range of the light emitting diode, further simplify the circuit structure, and provide a pulsed light adjustment circuit that reduces the production cost. This is the purpose of this application.

  An object of the present invention is to provide a pulsed light adjustment circuit that greatly increases illuminance.

  Another object of the present invention is to provide a pulsed light adjustment circuit that maintains a constant current value within the acceptance range of a light emitting diode.

  Another object of the present invention is to provide a pulsed light adjusting circuit that simplifies the circuit structure and reduces the production cost.

  The pulsed light adjustment circuit provided in the present invention that generates energy light capable of causing the body to feel a wave mainly includes a control signal having one high level signal and one low level signal in one time period. A control signal generating element that receives the drive power supply and the control signal, outputs the drive power supply when the control signal indicates a high level signal, and outputs the drive power supply when the control signal indicates a low level signal A drive element that stops output of the drive power supply; a set of light emitting diodes connected to the drive element and enabled to emit light by the drive power supply output by the drive element; and the light emission in different time periods By controlling the degree to which the diode is activated by the drive power supply, the energy light of the light emitting diode can be To exhibit one of the illuminance, including wave optical switching module.

  Therefore, the pulsed light adjustment circuit of the present application switches the illuminance by using the wave light switching module. The circuit of the wave light switching module mainly consists of a resistor and a control switch. Switching is quick and the circuit is relatively simplified. As for the increase in illuminance, the illuminance of the light emitting diode can be increased by changing the ratio of the control signal in the time period between the high level signal and the low level signal. At the same time, the light emitting diode is loaded in the time period. The constant current withstanding can be limited and maintained within the acceptable range, thereby achieving a protective effect.

FIG. 1 is a circuit diagram of an embodiment of a pulsed light adjustment circuit of the present application. FIG. 2 is a waveform diagram of a control signal of the pulse light adjustment circuit of FIG. FIG. 3 is a waveform diagram of a pulse width modulation signal of a pulse light adjustment circuit according to another embodiment of the present application. FIG. 4 is a current and illuminance curve diagram of the pulsed light adjustment circuit of FIG. FIG. 5 is a waveform diagram in which a pulse width modulation signal according to another embodiment of the present application is combined with an auxiliary pulse signal.

  The pulse light adjustment circuit provided in one embodiment of the present application generates energy light, which can cause the body to feel a wave having a periodic frequency, and makes the body feel a wave of the frequency to massage the skin. To achieve the effect.

  As shown in FIG. 1, the pulse light adjustment circuit of the present application mainly includes a control signal generation element 1, a drive element 2, a set of light emitting diodes (LEDs) 3, and a wave light switching module 4. The control signal generating element 1 generates a control signal 11 and has one high level signal 111 and one low level signal 112 within one time period 10. In this embodiment, the high level signal 111 and the low level signal 112 have the same ratio in the time period 10 as shown in FIG.

  The drive element 2 receives the drive power supply Vcc and the control signal 11, outputs the drive power supply Vcc when the control signal 11 indicates the high level signal 111, and drives when the control signal 11 indicates the low level signal 112. The output of the power supply Vcc is stopped. In the present embodiment, a plurality of light emitting diodes 3 are connected to the driving element 2 as a set, and light emission is enabled by a driving power source (constant current) output from the driving element 2. Depending on the extent to which the drive power source is activated, the emitted energy light can exhibit a plurality of different illuminances.

  The wave light switching module 4 controls the degree to which the light emitting diode 3 is activated by the drive power supply Vcc in different time periods 10. Here, the wave light switching module 4 includes a first resistor 41, a second resistor 42, and a control switch 43. The first resistor 41 is connected to the light emitting diode 3, the second resistor 42 is connected to the first resistor 41 and the ground terminal 40, and the control switch 43 has a first terminal 431 and a second terminal 432. And a third terminal 433. Among these, the first terminal 431 is connected between the first resistor 41 and the second resistor 42, the second terminal 432 is connected to the ground terminal 40, and the third terminal 433 is a switching signal. 44 is received.

Here, when the control switch 43 is controlled to open by the switching signal 44, the first resistor 41 and the second resistor 42 are connected in series, and the control switch 43 is controlled to be short-circuited by the switching signal 44. Then, the first resistor 41 and the control switch 43 are connected in series. In order to make the explanation easy to understand, the resistance values of the first resistor 41, the second resistor 42, and the control switch 43 are defined as R _fb1 , R _fb2 , and R _ds , respectively. The change of the control switch 43 and the change of the constant current that drives the light emitting diode 3 are as follows.

Here, V _ref is a fixed output voltage, and when the voltage is fixed and the resistance value changes, the constant current flowing through the light emitting diode 3 similarly changes. In this embodiment, the resistance value of the first resistor 41 and the second resistor 42 connected in series is larger than the resistance value of the first resistor 41 and the control switch 43 connected in series. By light switching, the light emitting diode 3 can obtain different constant currents, and generates energy light having a plurality of different illuminances.

However, the greater the difference in illuminance, the higher the body feels the vibrations, thereby improving the massage effect. Therefore, in another preferred embodiment, as shown in FIGS. 1 and 3, the control signal 11 generated by the control signal generating element 1 is exemplified as a pulse width modulation signal in order to make the difference in illuminance stand out. In the time period, the distribution of the ratio between the high level signal 111 and the low level signal 112 can be adjusted, and the power supply amount provided by the drive power supply can also be adjusted. The light emitting diode 3 has an acceptable range with respect to an acceptable power supply in each time period. Therefore, when the power supply amount of the drive power supply is increased in order to increase the degree of difference in illuminance, for example, the current for driving the light emitting diode 3 is increased from the original I ₁ = 350 nA to 4 times I ₂ = 1.4 A. When raised, the high level signal 111 also needs to be adjusted to a quarter period. Thereby, the electric power supply amount which a drive power supply provides can be maintained in the tolerance | permissible_range of the light emitting diode 3 in each time period.

  A curve of energy light and current change is shown in FIG. In FIG. 4, when the current increases N times, the light energy value A output from the light emitting diode (LED) 3 exhibits a curve and increases to the light energy value B. Therefore, the degree of difference in the light energy value of the light emitting diode (LED) 3 is greatly changed, and at the same time, the light emitting diode 3 can be protected and a normal operation state can be maintained.

  In order to make the periodic frequency wave more prominent, another preferred embodiment of the present application is that the control signal further includes an auxiliary pulse signal 20 as shown in FIGS. Is illustrated. Therefore, only when the pulse width modulation signal indicates the high level signal 111 and the pulse signal 200 also appears in the high level signal 111, the drive power supply provided by the drive element 2 can be output. Limit. Taking the four pulse signals 200 of this embodiment as an example, the original output current is controlled by the pulse signal 200 and is reduced to 1 / X of the original. Therefore, the required illuminance can be easily adjusted by this modulation method. By the above method, it is possible to control the waves of a plurality of different periodic frequencies, and increase the sense of massaging the skin.

  Therefore, the pulsed light adjustment circuit of the present application switches the illuminance by using the wave light switching module. The circuit of the wave light switching module mainly consists of two resistors and a control switch. By passing through the control switch, the resistance value of the series connection is changed, the constant current for driving the light emitting diode is changed, switching is quick, and the circuit is relatively simplified. The illuminance increase of this application is performed by the signal modulation method of the pulse width modulation signal, and even if the power supply amount increases, the constant current applied to the light emitting diode can be limited and maintained within the acceptable range within the time period. In each time period, the light emitting diode can be protected and a normal operation state can be maintained. The illuminance can be switched by the pass modulation method, and no other circuit needs to be designed. A simple circuit that is already installed can easily generate a plurality of different illuminances, thereby achieving the purpose of saving the circuit.

DESCRIPTION OF SYMBOLS 1 Control signal production | generation element 2 Drive element 3 Light emitting diode 4 Wave light switching module 10 Time period 11 Control signal 111 High level signal 112 Low level signal Vcc Drive power supply 41 1st resistor 42 2nd resistor 43 Control switch 431 1st 1 terminal 432 second terminal 433 third terminal 40 ground terminal 20 auxiliary pulse signal 200 pulse signal

Claims (8)

A pulsed light adjustment circuit that generates energy light that can cause the body to feel a wave;
A control signal generating element for generating a control signal having one high level signal and one low level signal in one time period;
Receiving the drive power supply and the control signal, outputting the drive power supply when the control signal indicates a high level signal, and stopping the output of the drive power supply when the control signal indicates a low level signal; A drive element;
A set of light emitting diodes connected to the drive element and enabled to emit light by the drive power source output by the drive element;
In each said time period, the light emitting diode to control the extent that is enabled by the driving power source, the energy beam of the light emitting diodes in each said time period, to indicate one of a plurality of illumination A wave light switching module;
Consisting of
The wave light switching module is:
A first resistor connected to the light emitting diode;
A second resistor connected to the first resistor and a ground terminal; and
A first terminal; a second terminal; and a third terminal, wherein the first terminal is connected between the first resistor and the second resistor, and the second terminal is the ground. A control switch connected to a terminal, wherein the third terminal receives a switching signal and opens or short-circuits based on the switching signal
including,
A pulsed light adjustment circuit characterized by that. When the control switch is controlled to open by the switching signal, the first resistor and the second resistor are connected in series,
2. The pulse light adjustment circuit according to claim 1 , wherein when the control switch is controlled to be short-circuited by the switching signal, the first resistor and the control switch are connected in series. The resistance value in series connection between the first resistor and the second resistor is larger than the resistance value in series connection between the first resistor and the control switch, and the illuminance of the light emitting diode is The pulse light adjustment circuit according to claim 2 , which changes based on a difference in resistance value.   The said control signal is a pulse width modulation signal, The ratio of the said high level signal and the ratio of the said low level signal can be adjusted in the said time period, The said illumination intensity which the said light emitting diode shows is switched. Pulse light adjustment circuit. The power supply amount of the drive power supply is adjustable, the power supply amount received by the light emitting diode within the time period has an allowable range, and the power supply amount of the drive power supply is a total amount in each time period. The pulse light adjustment circuit according to claim 4 , wherein an average value is within the allowable range. Before adjusting the ratio of Kidaka level signal and the low level signal, the power supply amount of the driving power supply, it is maintained within the allowable range at each said time period, the pulse light adjusting circuit according to claim 5. The control signal further includes an auxiliary pulse signal , and the auxiliary pulse signal is formed within the range of the high level signal,
The pulse light adjustment circuit according to claim 4 , wherein the auxiliary pulse signal has at least one pulse signal. The pulse width modulation signal indicates the high level signal,
The pulse light adjustment circuit according to claim 7 , wherein when the auxiliary pulse signal indicates the pulse signal, the drive element outputs the drive power supply.

Images