CN100414571C - Remote control method of LED decorative lighting fixtures - Google Patents

Abstract

The invention relates to a control method when light-emitting diodes are used as decorative lighting fixtures. Infrared technology is used to remotely control LED decorative lighting fixtures. The transmitting part uses MCU or special integrated circuit chips to generate coded or random control signals, and is equipped with external analog electric quantity signal input. The interface and the preset remote control coding signal data memory adopt multiple control methods to generate infrared remote control signals through function selection and processing; the receiving part uses embedded microprocessors for calculation and processing, and generates pulse width control signals in digital form, proportional to the on-off time of the switch The signals respectively control the on-off and magnitude of the working current of the RGB three primary color electrodes of each light-emitting diode to realize the digital control of the lighting, so as to maximize the advantages and strengths of the semiconductor lighting source and create a colorful and personalized dynamic The lighting atmosphere can achieve lighting effects that cannot be achieved by traditional lighting methods.

Description

Remote control method of LED decorative lighting fixtures

technical field

The present invention relates to a control method when light-emitting diodes (LEDs) are used as decorative lighting fixtures, in particular to a remote control method for LED decorative lighting lamps, especially for arbitrary shapes and various The invention discloses a remote control method for a style of LED decorative lighting fixture, which belongs to the technical field of semiconductor lighting and single-chip microcomputer application.

Background technique

Since Edison invented the electric light, human beings have entered a new era of artificial lighting sources, which have gone through three stages: incandescent lamps, neon lamps and gas discharge lamps. However, with the development of the social economy and the continuous improvement of the quality of life, people's requirements for lighting are getting higher and higher. Hope to work and live in a comfortable, flexible, personalized and artistic lighting environment. Lighting is also a master at creating an atmosphere. Whether it is the romance of a two-person world or the excitement of a group party, the soft, warm, relaxed, and gorgeous feelings can be fully displayed through different lights. However, it is a pity that the lighting system using traditional lamps is not capable of such a difficult task, and it is difficult to obtain high-level, high-quality, and high-efficiency lighting effects.

Since the beginning of the new century, with the continuous improvement of the high-power semiconductor light-emitting diode (LED) chip technology level, the continuous maturity of packaging and application technology, the luminous efficiency of LED has been greatly improved. At present, the luminous efficiency of 1W white LED products exceeds 60lm/W. LED has actually entered the field of decorative lighting, and related lamps continue to appear. The application of semiconductor lighting technology has given people a new visual enjoyment. It has obvious advantages over traditional neon lights, incandescent lamps, tungsten halogen lamps, and fluorescent lamps in terms of color performance, lighting control capabilities, environmental protection and energy saving. , the user can adjust its color, brightness, color temperature and other parameters at will, adjust their combined light, and arrange LEDs of different colors together to obtain the most suitable lighting state. Moreover, a remarkable feature of LED as a light source is that it can still maintain its lumen efficiency and light color parameters in a large range of driving current, and there is no delay and inertia, which is very suitable for digital control. This is the traditional light source, such as Incandescent lamps, fluorescent lamps and energy-saving lamps, unparalleled.

Contents of the invention

Based on the above technical background, the present invention provides a remote control method for LED decorative lighting fixtures, which aims to give full play to the advantages of LED decorative lighting fixtures, and organically combine digital technology with the control method of LED decorative lighting fixtures—especially the remote control method stand up.

The purpose of the present invention is achieved through the following technical solutions:

The remote control method for LED decorative lighting fixtures includes a signal transmission process and a signal reception process. The signal transmission process is input by a keyboard matrix to control signals, and a microprocessor or an integrated circuit chip is used to generate a coded signal or a random signal. The data memory is combined, multiple control methods are used to generate infrared remote control signals, and then the remote control signals are emitted by the infrared diode transmitter; the signal receiving process is that the infrared diode receiver receives the above remote control signals, and the signals are converted and amplified by the optical/electrical conversion amplifier , and then send it to the microprocessor for calculation and processing, set the output expansion module according to the number of LED decorative lighting fixtures, generate control signals in digital form, and control the average working current of the red, green and blue primary color electrodes of each LED .

Further, in the remote control method of the above-mentioned LED decorative lighting fixtures, the transmitting system used in the signal transmitting process is provided with an external analog electric quantity signal input interface, and the external analog electric quantity signal is input from this interface and is also processed into an infrared remote control signal after function selection. launch out.

Further, in the remote control method of the above-mentioned LED decorative lighting fixture, the microprocessor used in the signal receiving process is an embedded microprocessor, which is installed inside the lamp; the control signal generated in digital form during the signal receiving process can be pulse width control Signal, control pulse frequency ≥ 50 Hz, digital control range of lighting is 256 levels of brightness.

In addition, in the above-mentioned remote control method for LED decorative lighting fixtures, the LED decorative lighting fixtures are decorative lighting fixtures or lighting fixtures of any shape and style that use high-power, high-brightness, tri-primary-color light-emitting diodes above 1W as lighting sources.

The invention uses infrared technology to implement remote control of LED decorative lighting fixtures. Since infrared remote control is a widely used means of communication and remote control, it is a very mature technology. The combination of infrared remote control and LED decorative lighting fixtures can be described as a perfect match and complement each other. It can realize digital control of decorative lighting and maximize Give full play to the advantages and strengths of semiconductor lighting sources. Its main advantages are as follows:

(1) Since infrared remote control is a very mature technology, the remote control device made by applying the technical solution of the present invention has the characteristics of small size, low power consumption, strong function, low cost, etc., and is easy to install, easy to operate, and reliable in function , Safe to use;

(2) Digital operation is possible. Through digital control, it is very convenient to control the current size and on-off of LED lamps, whether the LED light source emits light, the color of light, and the intensity of light, etc., can all be controlled by the microprocessor at the receiving end of the infrared remote control;

(3) Personalized lighting can be realized. The transmitting part of the infrared remote control uses an application-specific integrated circuit chip or a microprocessor to code and modulate the control signal, and the receiving part uses an embedded microprocessor system. Through output expansion, the red (R) and green (G) of each light-emitting diode can be controlled separately. ) Blue (B) three primary color electrodes work, so that the light-emitting characteristics of the LED can be fully utilized for mixed light processing, so that the LEDs of the same or different light colors can be regularly changed in leaps and bounds, thereby creating a colorful and dynamic lighting atmosphere. Create a personalized lighting environment and a unique style and atmosphere;

(4) It can be controlled externally. The infrared remote control transmitting part is provided with an external signal input interface, and various external parameter analog electric signals can be used as remote control signals. In addition, the infrared remote control transmitter is also equipped with random selection buttons, and the remote control signal generated by random numbers is processed by the receiving part to form any grotesque color, which can give people a huge visual impact;

(5) Lighting fixtures can be effectively integrated with architectural decoration. The circuit board with infrared remote control function is combined with the semiconductor lighting source, and the control system is embedded in it. The lamps can be ultra-thin and ultra-light, and can be integrated with architectural decoration. The lamps are hidden, but the lights generated by infrared remote control can change endlessly. .

Description of drawings

The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings. in,

Fig. 1 is a schematic diagram of the infrared remote control emission system of the present invention;

Fig. 2 is an appearance mode of the infrared remote control transmitter;

Fig. 3 is a principle diagram of the infrared remote control receiving system of the present invention.

Detailed ways

The remote control method of the LED decorative lighting fixture of the present invention includes two major processes of signal transmission and signal reception. The transmission part uses a microprocessor (MCU) or an application-specific integrated circuit chip to generate a code or a random control signal, and is provided with an external analog electric quantity signal input interface. And the preset remote control coding signal data memory, using multiple control methods to generate infrared remote control signals through function selection processing; the receiving part uses an embedded microprocessor (MCU) for calculation and processing, and generates pulse width control signals in digital form. Switch on and off The time-proportional signal controls the on-off and magnitude of the working current of the red (R), green (G) and blue (B) three primary color electrodes of each light-emitting diode, so as to realize the digital control of lighting. In this way, the advantages and strengths of semiconductor lighting sources can be maximized, a colorful and personalized dynamic lighting atmosphere can be created, and lighting effects that cannot be achieved by traditional lighting methods can be achieved.

The principle of the signal transmission part of the present invention is shown in Figure 1, and the main components involved include: keyboard matrix 1, microprocessor 2 (MCU), infrared diode transmitter 3, LCD display screen 6 and transmission power supply 4. The keyboard matrix 1 is used to input remote control signals, the microprocessor 2 generates codes and modulates them, and the infrared diode transmitter 3 emits infrared coded signals. Due to the small power consumption of the transmitting part, the transmitting power supply 4 uses dry batteries; the keyboard matrix can adopt the specifications of 4×4～8×8, and the specific number is determined according to the needs of the control function; the LCD display 6 is used to display the operation content of the control function. The microprocessor 2 is also connected with a data memory 7 for storing predetermined remote control coded signals.

The remote control signal is mainly generated by the keyboard matrix 1, and an external signal input interface 5 can also be set in the infrared remote control transmitting part, which is used to input various external parameters such as language, music and other analog electric power signals, which are A/D converted by the microprocessor 2 After that, it also becomes a remote control signal to be emitted. In this way, the color and brightness of the LED decorative lighting can be controlled externally, and special sound effect lighting can be produced.

According to the user's preferences, the infrared remote control transmitter is also equipped with a random signal selection button. The remote control signal generated by the random number will form an unpredictable grotesque color after being processed by the receiving part, which can give people a huge visual impact.

Accompanying drawing 2 is a kind of appearance pattern of transmitter of infrared remote control system. In the figure, 3 is an infrared diode transmitter, 5 is an external signal input interface, and 6 is an LCD display screen. Common function keys include: power on/off/zero reset key 20, working mode switching key 21, RGB color increase/decrease key 22 /23/24, preset/timing execution key 25, time setting key 26, cycle cycle increase/decrease key 27, random signal/input signal switching key 28, etc.

The MCU code can adopt a number of binary code serial codes modulated by pulse width, and the first part of the information is the user identification code (boot code), which can distinguish different electrical equipment and prevent crosstalk between different types of remote control codes; the middle part It is the operation code (function code); the latter part is usually designed as the inverse code of the operation code, which is used to verify the correctness of the operation code. The binary code of the remote control signal generally undergoes secondary modulation with a carrier frequency of 38kHz to increase the anti-interference ability and improve the transmission efficiency to achieve the purpose of reducing power consumption. After the secondary modulation, infrared rays are emitted to space through infrared emitting diodes.

Fig. 3 is a schematic diagram of an infrared remote control receiving system, which consists of an infrared receiving diode 11, an optical/electrical conversion amplifier 12, and an embedded microprocessor system. The microprocessor is composed according to the minimum system, which includes a microprocessor 10 , an electronically erasable memory 13 (EEPROM), an output expansion module 14 and a timing module 15 . The lighting program is stored in the electronically erasable memory 13 (EEPROM), and the data is injected by the infrared transmitter of the remote control system. Timing module 15 provides time reference and time reservation for the infrared remote control system. The present invention relates to any shape and various styles of LED lamps used as decoration or illumination light source. The number of high-power tri-color light-emitting diodes is relatively large, so it is necessary to set an output expansion module 14, and its control port is connected with several pulse width generating modules. 16, respectively connected with red (R) green (G) blue (B) three primary color electrodes of all light-emitting diodes 18/1, 18/2, ..., 18/n of interior decoration lighting fixtures, AC/DC conversion circuit 17 makes Mains power is converted into low-voltage direct current 19 to supply all light-emitting diodes of the microprocessor system and interior lighting lamps.

A notable feature of light-emitting diodes used as lighting sources is that they can still maintain their lumen efficiency and light color parameters within a relatively large driving current range. The present invention uses a pulse width control method to control whether the light-emitting diode light source emits light and its luminous intensity. When the current is turned on, the LED emits light, and the intensity of the light is controlled by the pulse width. In a working cycle, the pulse width determines the conduction time of the LED current. The larger the proportion of the conduction time, the greater the average current passing through the LED in the working cycle, and the stronger the luminous intensity of the LED. For the commonly used 8-bit microprocessor (MCU), the control range is 2 ⁸ , and the digital control range of lighting reaches 256 levels of luminance, that is, 0-255, which is equivalent to the binary number 00000000-11111111, and the full limit is 256. That is to say, in the working cycle, when the binary control data is 00000000, the ratio of the conduction time is 0/256, the generated pulse width is 0, and the LED does not emit light; when the binary control data is 11111111, the conduction time is 0/256. The ratio is 255/256, the generated pulse width is 255/256 of the period, the average current is close to the maximum value, and the LED emits almost the maximum luminous intensity. In this way, it is very convenient to control the on-off and magnitude of the RGB three-pole current of each high-power tri-color light-emitting diode in digital form. (MCU) for control. Due to the persistence of vision of people, in order to obtain stable lighting, the repetition frequency of the control pulse output by the microprocessor usually cannot be lower than 50 Hz.

The technical solution of the present invention is applicable to LED decorative lighting fixtures of any shape and various styles, and is especially valuable for popularization and use in occasions where a three-primary-color light-emitting diode with a power of more than 1W and high brightness is used as a lighting source.

Claims (7)

1. The remote control method of LED decorative lighting fixtures, including the signal transmission process and the signal reception process, is characterized in that: the signal transmission process is input by the keyboard matrix to control signals, and the microprocessor or integrated circuit chip in the transmission system is used to generate coded signals or The random signal is combined with the data memory of the preset remote control code signal, and the infrared remote control signal is generated by multiple control methods, and then the remote control signal is transmitted by the infrared diode transmitter; the signal receiving process is received by the infrared diode receiver. The optical/electrical conversion amplifier converts and amplifies the signal, and then sends it to the microprocessor in the receiving system for calculation and processing. The output expansion module is set according to the number of LED decorative lighting fixtures, and the control signal is generated in digital form. For each LED The average working current of the red, green and blue primary color electrodes is controlled. 2. The remote control method for LED decorative lighting fixtures according to claim 1, characterized in that: the transmission system used in the signal transmission process is provided with an external analog electric quantity signal input interface, and the external analog electric quantity signal is input through the interface after function selection It is also processed into an infrared remote control signal and emitted. 3. The remote control method for LED decorative lighting fixtures according to claim 1, characterized in that: the microprocessor used in the signal receiving process is an embedded microprocessor installed inside the lamp. 4. The remote control method for LED decorative lighting fixtures according to claim 1, characterized in that: the control signal generated in digital form during the signal receiving process is a pulse width control signal. 5. The remote control method for LED decorative lighting fixtures according to claim 4, characterized in that: the frequency of the control pulse is ≥50 Hz. 6. The remote control method for LED decorative lighting fixtures according to claim 4, characterized in that: the digital control range of lighting is 256 levels of brightness. 7. The remote control method for LED decorative lighting fixtures according to claim 1, characterized in that: said LED decorative lighting fixtures are of any shape and any style using light-emitting diodes with a power of more than 1W, high brightness, and three primary colors as the lighting source Decorative light fixture or lighting fixture.

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