CN201651899U - Light emitting diode lamp system with automatic and manual dimming functions - Google Patents

Abstract

A light emitting diode lamp system with automatic and manual dimming functions mainly comprises an infrared remote control device, a light sensing unit, an infrared receiving unit, a dimming controller, a switch driving circuit and a light emitting diode lamp. The light emitting diode lamp system of the utility model integrates the light sensing unit and the infrared receiving unit, and uses the infrared remote control device to automatically or manually remotely dim the light emitting diode lamp to provide the most suitable lighting brightness.

Description

LED lighting system with automatic and manual dimming function

technical field

The utility model relates to a light-emitting diode lamp system, in particular to a light-emitting diode lamp system with automatic and manual dimming functions.

Background technique

Because light emitting diodes (light emitting diodes, LEDs) have the advantages of energy saving, environmental protection, long life, maintenance-free, etc., the status of LEDs has become unshakable no matter in the application fields of lighting, backlight or display panels. In addition, the use of LEDs has gradually shifted from early warnings and advertisements to general lighting. With the practical application of high-brightness LEDs, no matter from the point of view of usage or energy saving, the improvement of low cost, high efficiency, reliability, and high brightness will be the main direction for the future development of LEDs.

Using pulse width modulation technology (pulse width modulation, PWM) as the control method of LED brightness is to use simple digital pulses to repeatedly switch the LED drive circuit. The system only needs to provide digital pulses with different widths and narrows. Turn off the LED to change the conduction time of the forward current to achieve the brightness adjustment effect, which can reduce the brightness and generate thousands of brightness levels, making the color light and dark changes more detailed, and the image quality presentation is more perfect.

Due to the different colors or the number of LEDs used in LED light sources, different voltage values are required to light each light source, and if only one constant voltage power supply is used to light different light sources, the quantity must be added. Unequal series current-limiting resistors are used to limit the excessive output voltage of the power supply to the light source. Although this can light up the LED, it also causes power loss and turns into heat energy that accumulates on the light source. In addition, because the resistance value changes after the light source is turned on or the thermal effect of the environment, the most common situation is that the resistance of the light source itself will decrease when the temperature rises, and the output current of the power supply will greatly exceed the rated current value. , And cause the LED to be over-driven to light up and shorten the life. Therefore, the ideal LED driving method is to use constant current driving, so as to avoid the current change caused by the change of LED forward voltage, so as to ensure that the LED light source maintains the same luminous brightness.

Infrared remote control is currently the most widely used communication and remote control technology. Because the infrared remote control device has the advantages of being less susceptible to interference, low cost, and low power consumption, etc., infrared remote control is also used in televisions, video recorders, projectors, audio equipment, air conditioners and other small electrical devices.

The ambient light sensor (ALS) is a component that senses the intensity of the external ambient light source, converts the sensed light source intensity into an electrical signal, and automatically adjusts the brightness of the light source according to the change of the ambient light source to maintain the optimum brightness at any time. Achieve the most comfortable state for the user's eyes, and reduce the fatigue of the human eye from excessive use under strong light or in a low-light environment.

At present, the most commonly used indoor lighting operations are mostly the basic functions of on (full brightness) and off (full darkness). Therefore, once the lighting is turned on and used, no matter what the current ambient light level is, the brightness emitted by the lighting used All the same. In this way, the user cannot operate under the most appropriate brightness. In addition to eye fatigue caused by improper brightness, it will also cause unnecessary power consumption in demanding environments that do not require too much light brightness to operate.

Therefore, how to design an LED lamp system with automatic and manual dimming functions that can improve the deficiency of the prior art has become a major issue that the inventor of the present invention wants to overcome and solve.

Contents of the invention

The technical problem to be solved by the present invention is to provide an LED lighting system with automatic and manual dimming functions.

To achieve the above purpose, the LED lamp system provided by the present invention includes an infrared remote control device, a light sensing unit, an infrared receiving unit, a dimming controller, a switch driving circuit and an LED lamp.

The infrared remote control device is used for generating an infrared control signal. The light sensing unit is used for sensing ambient brightness to generate an ambient light signal. The infrared receiving unit is used for generating an infrared light signal. The dimming controller is electrically connected to the light sensing unit and the infrared receiving unit to generate a dimming control signal. The switch driving circuit is electrically connected to the dimming controller to receive the dimming control signal and generate a driving signal. The LED lamp is electrically connected to the switch driving circuit to receive a driving signal, and is driven by a constant current to adjust the brightness of the LED lamp.

In this way, the light sensing unit and the infrared receiving unit are integrated, and the infrared remote control device is used to perform automatic or manual remote dimming control on the LED lamps to adjust the most suitable ambient light brightness.

The above-mentioned light-emitting diode lighting system with automatic and manual dimming functions is characterized in that the infrared remote control device includes:

A button unit, further comprising:

A power switch button is pressed to generate a power switch signal;

a mode switch button, which is pressed to generate a mode switch signal; and

A brightness adjustment button is pressed to generate a brightness adjustment signal;

An encoding circuit electrically connected to the key unit to receive the power switch signal, the mode switching signal or the brightness adjustment signal, and encode the received signal; and

An infrared emitting unit is electrically connected with the coding circuit to generate the infrared control signal, and emits the infrared control signal for the infrared receiving unit to receive.

The above-mentioned light-emitting diode lighting system with automatic and manual dimming functions is characterized in that the infrared receiving unit includes:

a decoding circuit, which receives the infrared control signal and decodes the infrared control signal; and

A digital-to-analog conversion circuit is electrically connected to the decoding circuit to convert the decoded digital infrared control signal into an analog infrared control signal.

The above-mentioned LED lighting system with automatic and manual dimming functions is characterized in that the LED lighting is composed of a plurality of LED lamp strings.

The above-mentioned light-emitting diode lighting system with automatic and manual dimming functions is characterized in that the light sensing unit is an ambient light sensor (ALS).

The above-mentioned light-emitting diode lighting system with automatic and manual dimming function is characterized in that the infrared emitting unit is an infrared light-emitting diode (Infrared LED).

The above-mentioned light-emitting diode lighting system with automatic and manual dimming functions is characterized in that the dimming controller uses pulse width modulation control technology to generate digital pulse signals with different duty cycles to control the conduction of the switch drive circuit with cutoff.

Compared with the prior art, in the LED lamp system of the present invention, users can manually or adjust the brightness of the LED lamp according to actual needs, which can increase the flexibility of using the LED lamp. Or, it can automatically sense the brightness of the ambient light, and achieve the purpose of saving energy and electricity in the environment where a large amount of light is not necessary.

In order to further understand the technology, means and effects that the utility model adopts to achieve the predetermined purpose, please refer to the following detailed description and accompanying drawings of the utility model, and believe that the purpose, features and characteristics of the utility model can be obtained from this For an in-depth and specific understanding, the attached drawings are only for reference and illustration, and are not intended to limit the present invention.

Description of drawings

Fig. 1 is a circuit block diagram of a dimming control integrated module of the present invention;

Fig. 2 is the circuit block diagram of the light-emitting diode lighting system of the present invention; and

Fig. 3 is a circuit block diagram of an infrared remote control device of the present invention.

Wherein, reference sign is:

10 Infrared remote control device 15 20 Dimming control integration module

100 key unit 202 light sensing unit

102 Power switch button 204 Infrared receiving unit

104 Mode switching button 206 Dimming controller

106 Brightness adjustment button 208 Switch drive circuit

108 encoding circuit 20 30 LED light string

110 infrared emitting unit

Sir Infrared control signal Si Infrared light signal

Ba ambient brightness 25 Sc dimming control signal

Sa ambient light signal Sd drive signal

Detailed ways

Relevant technical content and detailed description of the utility model, cooperate accompanying drawing to illustrate as follows:

Please refer to FIG. 1 and FIG. 2 , which are the circuit block diagram of a dimming control integrated module and the circuit block diagram of the LED lamp system of the present invention, respectively. The dimming control integrated module 20 includes a light sensing unit 202 , an infrared receiving unit 204 , a dimming controller 206 and a switch driving circuit 208 . In addition, the LED lamp system further includes an infrared remote control device 10 and an LED lamp 30 . Wherein, the light sensing unit 202 is an ambient light sensor (ambient light sensor, ALS).

The infrared remote control device 10 is used for generating an infrared control signal Sir. The light sensing unit 202 is used for sensing an ambient brightness Ba to generate an ambient light signal Sa. The infrared receiving unit 204 is used for generating an infrared light signal Si. The dimming controller 206 is electrically connected to the light sensing unit 202 and the infrared receiving unit 204 respectively, and generates digital pulse signals with different duty cycles by pulse width modulation control technology to generate a dimming The control signal Sc is used to control the switch driving circuit 208 to be turned on and off. The switch driving circuit 208 is electrically connected to the dimming controller 206 for receiving the dimming control signal Sc and generating a driving signal Sd. The LED lamp 30 is composed of a plurality of LED strings (not shown). Moreover, the LED lamp 30 is electrically connected to the switch driving circuit 208 for receiving the driving signal Sd, and using the feedback voltage to control the current driving the LED lamp 30 to achieve the purpose of driving the LED lamp 30 with a constant current. In this way, during the dimming process, the magnitude of the current flowing through the LED lamp 30 is not changed, but only the switch conduction period of the switch driving circuit 208 is changed, so that the LED lamp 30 maintains the same pulse width in each pulse width period. average current size.

Please refer to FIG. 3 , which is a circuit block diagram of an infrared remote control device of the present invention. The infrared remote control device 10 includes a button unit 100 , an encoding circuit 108 and an infrared emitting unit 110 . The key unit 100 includes a power switch key 102 , a mode switch key 104 and a brightness adjustment key 106 . The power switch button 102 is pressed to generate a power switch signal (not shown), the mode switch button 104 is pressed to generate a mode switch signal (not shown), and the brightness adjustment button 106 is pressed to generate a Brightness adjustment signal (not shown). The infrared emitting unit 110 is an infrared light emitting diode (Infrared LED).

The encoding circuit 108 is electrically connected to the key unit 100 for receiving the power switch signal, the mode switching signal or the brightness adjustment signal, and encoding the received signal. The infrared emitting unit 110 is electrically connected to the encoding circuit 108 to generate the infrared control signal Sir, and transmit the infrared control signal Sir for the infrared receiving unit 204 to receive.

In addition, the infrared receiving unit 204 includes a decoding circuit (not shown) and a digital-to-analog conversion circuit (not shown). The decoding circuit receives the infrared control signal Sir, and decodes the infrared control signal Sir. The digital-to-analog conversion circuit is electrically connected to the decoding circuit for converting the decoded digital infrared control signal into an analog infrared control signal, which is the infrared light signal Si.

It is worth mentioning that since light-emitting diodes are driven by a DC power source, which is different from ordinary lamps driven by an AC power source, the embodiment of the utility model also includes an AC-to-DC conversion device for converting the input AC mains power The power is converted into a DC power that can drive the LED lamp 30 . Since the AC-to-DC conversion technology can use a well-known AC-to-DC conversion device, it will not be repeated here.

In the LED lamp system with automatic and manual dimming functions described in the present invention, the dimming controller 206 can control any brightness within the brightness range of the LED lamp 30 . Assuming that the user can operate the infrared remote control device 10 to meet the control requirements of general indoor lamps and lanterns, and the light-emitting diode lamp 30 can be arbitrarily adjusted within the range of 0% (full dark) to 100% (full brightness) according to different usage needs. Brightness adjustment. The procedure for the user to operate and control the LED lamp 30 can be described as follows: first, the user turns on the switch of the LED lamp (for example, a push switch mounted on the wall can be turned on) or presses the button of the infrared remote control device 10 The power switch button 102 . Then, the light sensing unit 202 of the LED lamp 30 can automatically sense the current ambient brightness Ba, so that the LED lamp 30 can automatically adjust to emit a corresponding brightness. That is, the automatic sensing action of the light sensing unit 202 can be defined as a preset action for the LED lamp 30 to start operating. In addition, during use, if the user feels that there is a need to adjust the light, he can operate and press the mode switch button 104 of the infrared remote control device 10, so that the automatic function originally provided by the light sensing unit 202 can be turned on and off. Sensing operation, switching to the manual control mode of the infrared remote control device 10 . In this mode, the user can increase or decrease the brightness of the LED lamp 30 by pressing the brightness adjustment button 106 of the infrared remote control device 10 . In addition, when the user feels that there is no need to adjust the light, he can press the mode switching button 104 again to switch to the automatic dimming mode of the light sensing unit 202, so that the ambient light can be sensed by the light sensing unit 202 The brightness of the light emitting diode lamp 30 is automatically adjusted. Finally, when the user finishes using the LED lamp 30 , he can choose to turn off the push switch installed on the wall or press the power switch button 102 to turn off the LED lamp 30 .

In this way, the light sensing unit 202 and the infrared receiving unit 204 are integrated, and the infrared remote control device 10 is used to perform automatic or manual remote dimming control of the LED lamp 30 to adjust the most suitable ambient light brightness.

In summary, the main advantages of the utility model are as follows:

According to actual needs, the user can manually control the infrared receiving unit 204 to adjust the brightness of the LED lamp 30 , which increases the flexibility of using the LED lamp 30 . Alternatively, the light sensing unit 202 can be used to automatically sense the brightness of ambient light, so as to achieve the purpose of saving energy and electricity in an environment where a large amount of light is unnecessary.

Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Those skilled in the art can make various modifications according to the utility model without departing from the spirit and essence of the present invention. There are various corresponding changes and modifications, but these corresponding changes and modifications should fall within the protection scope of the appended claims of the present invention.

Claims (7)

1. A light-emitting diode lighting system with automatic and manual dimming functions, characterized in that it comprises: An infrared remote control device for generating an infrared control signal; a light sensing unit, used for sensing ambient brightness to generate an ambient light signal; an infrared receiving unit for generating an infrared light signal; a dimming controller electrically connected to the light sensing unit and the infrared receiving unit to generate a dimming control signal; a switch driving circuit electrically connected to the dimming controller to receive the dimming control signal and generate a driving signal; and A light-emitting diode lamp, electrically connected to the switch driving circuit, to receive the driving signal, and be driven by a constant current to adjust the luminance of the light-emitting diode lamp; In this way, the light sensing unit and the infrared receiving unit are integrated, and the infrared remote control device is used to perform automatic or manual remote dimming control of the light-emitting diode lamp, so as to adjust the most suitable ambient light brightness. 2. The LED lighting system with automatic and manual dimming functions as claimed in claim 1, wherein the infrared remote control device comprises: A button unit, further comprising: A power switch button is pressed to generate a power switch signal; a mode switch button, which is pressed to generate a mode switch signal; and A brightness adjustment button is pressed to generate a brightness adjustment signal; An encoding circuit electrically connected to the key unit to receive the power switch signal, the mode switching signal or the brightness adjustment signal, and encode the received signal; and An infrared emitting unit is electrically connected with the coding circuit to generate the infrared control signal, and emits the infrared control signal for the infrared receiving unit to receive. 3. The LED lighting system with automatic and manual dimming functions as claimed in claim 1, wherein the infrared receiving unit comprises: a decoding circuit, which receives the infrared control signal and decodes the infrared control signal; and A digital-to-analog conversion circuit is electrically connected to the decoding circuit to convert the decoded digital infrared control signal into an analog infrared control signal. 4. The LED lamp system with automatic and manual dimming functions as claimed in claim 1, wherein the LED lamp is composed of a plurality of LED lamp strings. 5. The LED lighting system with automatic and manual dimming functions as claimed in claim 1, wherein the light sensing unit is an ambient light sensor (ALS). 6. The light-emitting diode lighting system with automatic and manual dimming functions as claimed in claim 2, wherein the infrared emitting unit is an infrared light-emitting diode (Infrared LED). 7. The light-emitting diode lighting system with automatic and manual dimming functions as claimed in claim 1, wherein the dimming controller uses pulse width modulation control technology to generate digital pulse signals with different duty periods to Control the on and off of the switch driving circuit.

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