Patent Grant
10660181
The subject matter herein generally relates to controllable silicon light regulation apparatus.
Light emitting diodes (LEDs) are widely used in illumination system based on properties such as energy-efficiency, greenness, controllability, and stability. In a normal illumination system, for dimming a color temperature, a driving source is needed, and the driving source converts an alternating current into a direct current to the LEDs. The cost of the driving source is too high, thus there is a room for improvement.
Implementations of the present disclosure will be described, by way of example only, with reference to the figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein.
In general, the word “module,” as used herein, refers to logic embodied in hardware or firmware, or to a collection of software instructions, written in a programming language, for example, Java, C, or assembly. One or more software instructions in the modules may be embedded in firmware, such as an EPROM, magnetic, or optical drives. It will be appreciated that modules may comprise connected logic units, such as gates and flip-flops, and may comprise programmable units, such as programmable gate arrays or processors, such as a CPU. The modules described herein may be implemented as either software and/or hardware modules and may be stored in any type of computer-readable medium or other computer storage systems. The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series, and the like. The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references can mean “at least one.”
The present disclosure describes a controllable silicon light regulation apparatus.
The controllable silicon light regulation apparatus 1 includes a first controllable silicon light regulation circuit 20 and a second controllable silicon light regulation circuit 30. The first controllable silicon light regulation circuit 20 includes a first LED source module 21, and the second controllable silicon light regulation 30 includes a second LED source module 31. The first controllable silicon light regulation circuit 20 regulates a driving current for adjusting a color temperature of the light emitted by the first LED source module 21, and the second controllable silicon light regulation circuit 30 regulates a driving current for adjusting a color temperature of the light emitted by the second LED source module 31. The first LED source module 21 includes at least one LED, and the second LED source module 31 includes at least one LED. A maximum color temperature of the light emitted by the first LED source module 21 is the first color temperature, and a maximum color temperature of the light emitted by the second LED source module 31 is the second color temperature.
The first controllable silicon light regulation circuit 20 further includes a first surge protection module 24, a first rectification filter module 25, a first controllable silicon light regulation module 26, and a first flicker protection module 28.
The first rectification filter module 25 is electrically connected between the fuse F1 and the first controllable silicon light regulation module 26. The first rectification filter module 25 filters the AC from the AC power 10, and converts the AC into direct current. The first rectification filter module 25 includes a first resistor RX1, a second resistor RX2, a third resistor RX3, a bridge diode BD1, and a filter capacitor CBB1. The first resistor RX1 and the second resistor RX2 are electrically connected between the fuse F1 and a first terminal of the bridge diode BD1 in series. A second terminal of the bridge diode BD1 is electrically connected to a first ground terminal, and a third terminal of the bridge diode BD1 is electrically connected to a second terminal N of the AC source 10 through the third resistor RX3. A fourth terminal of the bridge diode BD1 is electrically connected to the first controllable silicon light regulation module 26. A first terminal of the filter capacitor CBB1 is electrically connected to the four terminal of the bridge diode BD1, and a second terminal of the filter capacitor CBB1 is electrically connected to the first ground terminal.
The first controllable silicon light regulation module 26 is electrically connected between the first rectification filter module 25 and the first LED source module 21. The first controllable silicon light regulation module 26 generates the driving current to the first LED source module 21 based on the direct current generated by the first rectification filter module 25. The first controllable silicon light regulation module 26 includes a first chip U1, a first division resistor R4, a second division resistor R5, a second filter capacitor C5, a first transistor Q1, a first electromagnetic compatibility (EMI) protection resistor RG; and a third division resistor R6. The first division resistor R4 and the second division resistor R5 are electrically connected between the fourth terminal of the bridge diode BD1 and the first ground terminal in series. The first chip U1 is electrically connected to the first transistor Q1. The first chip U1 detects a phase angle of the AC and adjusts a duty ratio of a pulse width modulation (PWM) signal provided to a gate electrode of the first transistor Q1. The first chip U1 stores a plurality of specified color temperatures. In one embodiment, the number of the specified color temperatures is 42. A difference between adjacent specified color temperatures is 100K. The first chip U1 selects a specified number of the specified color temperatures as target color temperatures based on a segment value. In one embodiment, the target color temperatures are separated from each other. In other embodiments, the target color temperatures can be adjacent. In one embodiment, the first chip U1 stores a table of the segment value and the target color temperatures. A source electrode of the first transistor Q1 is electrically connected to the first ground terminal through the third division resistor R6, and a drain electrode of the first transistor Q1 is electrically connected to the first flicker protection module 28.
The first flicker protection module 28 is electrically connected between the first controllable silicon light regulation module 25 and the first LED source module 21. The first flicker protection module 28 prevents the first LED source module 21 from flickering. The first flicker protection module 28 includes a second transistor Q3, a first diode ZD1, a second diode ZD2, a first protection resistor R10, a second protection resistor R11, a first protection capacitor C1, a second protection capacitor C6, and a third protection resistor R1. A gate electrode of the second transistor Q3 is electrically connected to the first LED source module 21 through the first diode ZD1 and the second diode ZD2, a drain electrode of the second transistor Q3 is electrically connected to the drain electrode of the first transistor Q1, and a source electrode of the second transistor Q3 is electrically connected to the first LED source module 21. An anode of the first diode ZD1 is electrically connected to the source electrode of the second transistor Q3, and a cathode of the first diode ZD1 is electrically connected to an anode of the second diode ZD2. A cathode of the second diode ZD2 is electrically connected to the gate electrode of the second transistor Q3. The third protection resistor R1 and the first protection capacitor C1 are electrically connected in parallel between the first LED source module 21 and the drain electrode of the second transistor Q3. The first protection resistor R10 and the second protection resistor R11 are electrically connected between the source electrode and the drain electrode of the second transistor Q3 in series. A first terminal of the second protection capacitor C6 is electrically connected to the cathode of the second diode ZD2, and a second terminal of the second protection capacitor C6 is electrically connected to the drain electrode of the second transistor Q3.
The second controllable silicon light regulation circuit 30 includes a second surge protection module 34, a second rectification filter module 35, a second controllable silicon light regulation module 36, and a second flicker protection module 38. The second surge protection module 34 is electrically connected between a third terminal L2 of the AC power 10 and the second rectification filter module 35. The structure of the second surge protection module 34 is similar to the structure of the first surge protection module 24. The structure of the second rectification filter module 35 is similar to the structure of the first second rectification filter module 25. The structure of the second controllable silicon light regulation module 36 is similar to the structure of the first controllable silicon light regulation module 26. The structure of the second flicker protection module 38 is similar to the structure of the first flicker protection module 28.
In the segment dimming mode, a switch (not shown) is provided for controlling the AC source 10, and the AC source outputs the AC when the switch is turned on. The controllable silicon light regulation apparatus 1 counts a number of times the switch is turned on (or a number of turn-on times) in a specified time duration, and regulates the driving current to the first LED source module 21 and the second LED source module 31 based on the counted number of turn-on times, thus the color temperature of the light emitted by the controllable silicon light regulation apparatus 1 is gradually regulated in a loop between the target color temperatures. In one embodiment, the higher the number of turn-on times is, the warmer is the color temperature. In other embodiments, the higher the number of turn-on times, the cooler is the color temperature. The light emitted by the controllable silicon light regulation apparatus 1 is mixed by the first LED source module 21 and the second LED source module 31. When the segment value is N, there are N target color temperatures. In one embodiment, the specified time duration is 1 second.
When the segment value is 3, the light emitted by the controllable silicon light regulation apparatus 1 is capable of switching between three target color temperatures based on the counted number of turn-on times in the specified time duration. When the number of turn-on times is counted to be 1, the light emitted by the controllable silicon light regulation apparatus 1 is in a first target color temperature. In one embodiment, the first target color temperature is 2700K. Under the first target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 87% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 13% of the second color temperature. When the number of counted turn-on times is counted to be 2, the light emitted by the controllable silicon light regulation apparatus 1 is in a second target color temperature, which is warmer than the first target color temperature. In one embodiment, the second target color temperature is 3000K. Under the second target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 83% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 17% of the second color temperature. When the counted number of turn-on times is counted to be 3, the light emitted by the controllable silicon light regulation apparatus 1 is in a third target color temperature, which is warmer than the second specified color temperature. In one embodiment, the third target color temperature is 5000K. Under the third target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 33% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 67% of the second color temperature.
When the segment value is 5, the light emitted by the controllable silicon light regulation apparatus 1 is capable of switching between five target color temperatures based on the counted number of turn-on times in the specified time duration. When the counted number is 1, the light emitted by the controllable silicon light regulation apparatus 1 is in a first target color temperature. In one embodiment, the first target color temperature is the first color temperature. Under the first target color temperature, the color temperature of the light emitted by the first LED source module 21 is the first color temperature, and the second LED source module 31 stops emitting light. When the counted number is 2, the light emitted by the controllable silicon light regulation apparatus 1 is in a second target color temperature, which is warmer than the first target color temperature. In one embodiment, the second target color temperature is 2700K. Under the second target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 87% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 13% of the second color temperature. When the counted number is 3, the light emitted by the controllable silicon light regulation apparatus 1 is in a third target color temperature, which is warmer than the second target color temperature. In one embodiment, the third target color temperature is 3000K. Under the third target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 83% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 17% of the second color temperature. When the counted number is 4, the light emitted by the controllable silicon light regulation apparatus 1 is in a fourth specified color temperature, which is warmer than the third target color temperature. In one embodiment, the fourth target color temperature is 5000K. Under the fourth target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 33% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 67% of the second color temperature. When the counted number is 5, the light emitted by the controllable silicon light regulation apparatus 1 is in a fifth target color temperature, which is warmer than the fourth target color temperature. In one embodiment, the fifth target color temperature is 6500K. Under the fifth target color temperature, the first LED source module 21 stops emitting light, and the second LED source module 31 emits light. The color temperature of the light emitted by the second LED source module 31 is the second color temperature.
When the segment value is 6, the light emitted by the controllable silicon light regulation apparatus 1 is capable of switching between six target color temperatures based on the counted number of turn-on times in the specified time duration. When the counted number is 1, the light emitted by the controllable silicon light regulation apparatus 1 is in a first target color temperature. In one embodiment, the first target color temperature is the first color temperature. Under the first target color temperature, the color temperature of the light emitted by the first LED source module 21 is the first color temperature, and the second LED source module 31 stops emitting light. When the counted number is 2, the light emitted by the controllable silicon light regulation apparatus 1 is in a second target color temperature, which is warmer than the first target color temperature. In one embodiment, the second target color temperature is 2700K. Under the second target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 87% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 13% of the second color temperature. When the counted number is 3, the light emitted by the controllable silicon light regulation apparatus 1 is in a third specified color temperature, which is warmer than the second target color temperature. In one embodiment, the third target color temperature is 3000K. Under the third target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 83% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 17% of the second color temperature. When the counted number is 4, the light emitted by the controllable silicon light regulation apparatus 1 is in a fourth target color temperature, which is warmer than the third target color temperature. In one embodiment, the fourth target color temperature is 4000K. Under the fourth target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 60% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 40% of the second color temperature. When the counted number is 5, the light emitted by the controllable silicon light regulation apparatus 1 is in a fifth target color temperature, which is warmer than the fourth target color temperature. In one embodiment, the fifth target color temperature is 5000K. Under the fifth target color temperature, the first LED source module 21 and the second LED source module 31 emit light. The color temperature of the light emitted by the first LED source module 21 is 33% of the first color temperature, and the color temperature of the light emitted by the second LED source module 31 is 67% of the second color temperature. When the counted number is 6, the light emitted by the controllable silicon light regulation apparatus 1 is in a sixth target color temperature, which is warmer than the fifth target color temperature. In one embodiment, the sixth target color temperature is the second color temperature. Under the fifth target color temperature, the first LED source module 21 stops emitting light, and the second LED source module 31 emits light. The color temperature of the light emitted by the second LED source module 31 is the second color temperature.
In linear dimming mode, the first controllable silicon light regulation circuit 20 detects the phase angle of the first terminal L1, and regulates the duty ratio of the PWM provided to the first LED source module 21, thus the color temperature of the light emitted by the first LED source module 21 is linearly changed. The second controllable silicon light regulation circuit 30 detects the phase angle of the third terminal L2, and regulates the duty ratio of the PWM provided to the second LED source module 31, thus the color temperature of the light emitted by the second LED source module 31 is linearly changed.
Based on the structure of the controllable silicon light regulation apparatus 1, the controllable silicon light regulation apparatus 1 switches between the segment dimming mode and the linear segment dimming mode. The controllable silicon light regulation apparatus 1 is driven by the AC source without a driving power element. Thus, the cost of the controllable silicon light regulation apparatus 1 is reduced.
While various and preferred embodiments have been described the disclosure is not limited thereto. On the contrary, various modifications and similar arrangements (as would be apparent to those skilled in the art) are also intended to be covered. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2019 1 0713374 | Aug 2019 | CN | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 20180242422 | Choi | Aug 2018 | A1 |
