1. Field of the Invention
The present invention relates to an LED driver capable of controlling color/color temperature with a power carrier, in particularly to an LED array that generates stable color temperature or color, which allows a dimmer to constantly maintain the color temperature or color.
2. Description of the Related Art
A color temperature is conventionally stated in the unit of absolute temperature, symbolized by 0° K. Namely, a black material that does not reflect contains −273° C. When the black material is heated to 2000° K, a reddish light is emitted; when the black material is heated to 3000° K, the reddish light becomes orange to yellowish; when the black material is heated to 5000° K, a white light is emitted; when the black material is heated to 8000° K, a bluish light is emitted. Obviously, a higher temperature results in a bluer light; oppositely, a lower temperature results in a redder light. The concept of color temperature is commonly applied to light building interiors for presenting four seasons. For example, in summer, a higher color temperature (over 6000° K) may be adopted for allowing a bluish color to present a fresher atmosphere; in winter, a lower color temperature (below 3300° K) may be adopted for allowing a reddish color to present a warmer atmosphere; as to spring and fall, a middle color temperature (about 3000° K to 6000° K) may be adopted for allowing a blue color to present a cooler atmosphere. There are also some researches indicating that the colored light and proper color temperature benefit growing certain plants or animals, which will be emphasized and developed in the future.
The applicant of the present invention disclosed an R.O.C. patent No. M416294 of a “CONTROLLER FOR ALTERING A COLOR TEMPERATURE OF AN LED”. Wherein, a power switch or an extra controlling switch is able to trigger a color temperature adjuster to emit signals, thereby changing a color temperature of the LED. Accordingly, the color temperature, the color, and illumination of the LED are controlled.
I. Problems to be solved:
1. In the disclosure, the color temperature is controlled by pressing the power switch (a wired switch) with different pressing times. Namely, different pressing times present different means for outputting color temperature or color in an LED array. Herein, a dimmer can not be utilized to control the illumination of the LED since the color temperature adjuster is driven by the power switch containing direct current to output a power signal in accordance with a predetermined color temperature value. Thereby, the LED illuminates accordingly. If the dimmer is utilized to adjust the current and control the illumination of the LED, signals from the dimmer adversely interfere with driving signals of a color temperature switcher. Unfavorably, the LED provides flickering light.
2. In order to decrease influences of adjusting current phase angle of the dimmer on the color temperature switcher, an in order to prevents the LED from providing flickering light, a controlling switch is further installed on the color temperature switcher for individually altering the outputting controlling signal of the color temperature value. II. Means for solving the problems:
1. A synchronous and dimmer action detection differentiates an action of a dimmer and an action of an ON/OFF count via the dimmer and the LED color or color temperature output controller. The LED color or color temperature output controller outputs a signal presenting a color temperature value in accordance with an action selected by the ON/OFF count, thereby allowing an LED array to emit an accordant color temperature or color suited to the atmosphere. When the illumination is to be adjusted, the dimmer adjusts an outputting phase angle, so that a dimmable LED driver circuit transforms an alternating current signal to a direct current signal. Thereby, an output current is able to control the illumination of the color temperature or color of the LED array. Preferably, the signals from the LED color or color temperature output controller are not influenced by the dimmer altering the current, so that even if the light is being emitted, the illumination can be adjusted stably. Therefore, the light does not flicker, and the color or color temperature do not deviate.
2. A reset function is set in every circulation of pressing the ON/OFF count. Each pressing has a correspondent signal set in the color temperature value of the LED color or color temperature output controller, and controls an output of a correspondent power for driving the LED array to send a desired color temperature or color. An LED condition memory memorizes the pressing, so that after the power supply is turned off and the power supply is turned on in a next time, the LED array provides the same color temperature or color and illumination again in accordance with the prior memorized signal.
3. The LED array adopts a four-season lamp cooperating with an output color temperature of said LED color or color temperature output controller. Two strings of the LED array are arranged, one string of which is in a high color temperature arrangement and the other string of which is in a low color temperature arrangement. The ON/OFF count is applied for selecting a determined color temperature signal in accordance with the outputting light, thereby offering colored light that fits with an alternation of four seasons.
4. The two strings of the LED array are arranged by alternating a high-color-temperature arrangement with a low-color-temperature arrangement. The two strings of the LED array provide different numbers of LED lamps to adjust an output of altered color temperature, which drives the LED color or color temperature output controller to output a correspondent value for users to set an output performance as desired.
5. The LED array includes a string of red LED, a string of blue LED, and a string of white LED, which is adapted to a set value of the LED color or color temperature output controller for the LED array to emit a correspondent colored light requisite for planting and cultivating and concurrently so as to enhance growing speeds of plants and animals.
6. The LED array includes a string of red LED, a string of blue LED, a string of green LED, and a string of white LED. The LED color or color temperature output controller is controlled by the ON/OFF count and the dimmer so as to provide a set value for the LED array to emit a correspondent colored light that is especially suited to a business environment or a home atmosphere.
a dimmer (1) connected to a dimmable LED driver circuit (2) and an input end of an ON/OFF count (5);
a dimmable LED driver circuit (2) having an input end connected to an output end of the dimmer (1) and the input end of the ON/OFF count (5), an output end of the dimmable LED driver circuit (2) being connected to an LED array (3) and an input end of a power supply (4);
the input end of the power supply (4) being connected to the output end of the dimmable LED driver circuit (2) and an input end of the LED array (3), respectively; an output end of the power supply (4) being respectively connected to the ON/OFF count (5), a synchronous and dimmer action detection (6), an LED color or color temperature output controller (7), an LED condition memory (8), and an input end of an LED output buffer (9);
the input end of the LED array (3) being respectively connected to the output end of the dimmable LED driver circuit (2) and the input end of the power supply (4); an output end of the LED array (3) being connected to one input end of the LED output buffer (9);
the input end of the ON/OFF count (5) being respectively connected to the output end of the dimmer (1) and the input end of the dimmable LED driver circuit (2); one output end of the ON/OFF count (5) being respectively connected to the LED color or color temperature output controller (7) and an input end of the synchronous and dimmer action detection (6);
the input end of the synchronous and dimmer action detection (6) being connected to the output end of the ON/OFF count (5); the input end of the synchronous and dimmer action detection (6) being connected to an input end of the LED color or color temperature output controller (7);
the input end of the LED color or color temperature output controller (7) being respectively connected to the other output end of the ON/OFF count (5) and an output end of the synchronous and dimmer action detection (6); a data gate of the LED color or color temperature output controller (7) being connected to the LED condition memory (8) and the other input end of the LED output buffer (9); whereby, the LED color or color temperature output controller (7) is able to read/write data in the LED condition memory (8);
the input end of the LED output buffer (9) being respectively connected to the LED array (3) and an output end of the LED color or color temperature output controller (7), thereby receiving an output signal from the LED color or color temperature output controller (7) and controlling a color temperature or a color of the LED array (3) to be properly output.
Wherein, when the dimmer (1) (as shown in
Referring to
Referring to
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Referring to
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A control signal is adopted as aforesaid. The dimmer (1) allows the circuit to output a signal so as to adjust illumination of the LED array (3) via a power carrier. Alternatively, the ON/OFF count (5) allows the LED color or color temperature output controller (7) to output a signal so as to adjust the color temperature or color of the LED array (3). Preferably, two power circuits are enough for adjusting illumination, color temperature, and color, which further prevents flickering light and deviating color or color temperature.
Number | Date | Country | Kind |
---|---|---|---|
101206482 A | Apr 2012 | TW | national |
Number | Name | Date | Kind |
---|---|---|---|
7902771 | Shteynberg et al. | Mar 2011 | B2 |
8022634 | Greenfeld | Sep 2011 | B2 |
8264169 | Shteynberg et al. | Sep 2012 | B2 |
8441210 | Shteynberg et al. | May 2013 | B2 |
8476844 | Hancock et al. | Jul 2013 | B2 |
20110187276 | Shteynberg et al. | Aug 2011 | A1 |
20120153851 | Sauerlaender | Jun 2012 | A1 |
20120306389 | Shteynberg et al. | Dec 2012 | A1 |
20130009551 | Knapp | Jan 2013 | A1 |
Number | Date | Country | |
---|---|---|---|
20130264956 A1 | Oct 2013 | US |