LED brightness color temperature linear dimming circuit

Abstract

The utility model discloses an LED brightness color temperature linear dimming circuit which comprises a direct current dimmer and at least one LED light source connected with the direct current dimmer. The LED light source comprises a high-color-temperature light-emitting unit and a low-color-temperature light-emitting unit which are arranged in parallel, the high-color-temperature light-emitting unit comprises a plurality of high-color-temperature LED lamp beads which are connected in series, the low-color-temperature light-emitting unit comprises an adjusting module and a plurality of low-color-temperature LED lamp beads which are connected in series, and the adjusting module is provided with at least one linear resistor element. According to the utility model, linear adjustment of brightness and color temperature can be realized.

Description

Technical Field

[0001] The utility model relates to the field of LED lamps, in particular to an LED brightness and color temperature linear dimming circuit. Background Art

[0002] LED lamps are a common lighting fixture and are widely used in people's daily lives. Most of the existing LED lamps can only adjust the brightness, and the few LED lamps that can adjust the color temperature use multiple color temperature levels for adjustment. That is, the existing LED lamps cannot linearly adjust the brightness and color temperature like incandescent lamps, and are not very comfortable to use, which can easily cause people to have glare or glare problems.

[0003] In view of the above problems, it is necessary to study an LED brightness and color temperature linear dimming circuit, which can achieve linear adjustment of brightness and color temperature. Utility Model Content

[0004] The utility model aims to provide an LED brightness and color temperature linear dimming circuit, which can realize linear adjustment of brightness and color temperature.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] An LED brightness color temperature linear dimming circuit comprises a DC dimmer and at least one LED light source; the LED light source comprises a high color temperature light-emitting unit and a low color temperature light-emitting unit arranged in parallel; the high color temperature light-emitting unit comprises a plurality of high color temperature LED lamp beads connected in series, and the positive and negative poles of the high color temperature light-emitting unit are respectively connected to the positive and negative poles of the DC dimmer; the low color temperature light-emitting unit comprises an adjustment module and a plurality of low color temperature LED lamp beads connected in series, and the positive and negative poles of the low color temperature light-emitting unit are respectively connected to the positive and negative poles of the DC dimmer, the color temperature of the low color temperature LED lamp beads is lower than the color temperature of the high color temperature LED lamp beads, and the adjustment module has at least one linear resistance element; the total rated power of all low color temperature LED lamp beads of the low color temperature light-emitting unit of each LED light source is lower than the total rated power of all high color temperature LED lamp beads of the high color temperature light-emitting unit of the LED light source.

[0007] The number of low color temperature LED lamp beads in the low color temperature light emitting unit of each LED light source is one less than the number of high color temperature LED lamp beads in the high color temperature light emitting unit of the LED light source.

[0008] The regulating module comprises a linear resistance element and a compensation LED lamp bead which are arranged in series, and the color temperature of the compensation LED lamp bead is the same as the color temperature of the low color temperature LED lamp bead.

[0009] The adjustment module includes a linear resistance element and a compensation LED lamp bead arranged in parallel, and the color temperature of the compensation LED lamp bead is the same as the color temperature of the low color temperature LED lamp bead.

[0010] The regulating module includes a linear resistance element connected in series with all the low color temperature LED lamp beads of the low color temperature light emitting unit.

[0011] The rated power of the low color temperature LED lamp bead is lower than the rated power of the high color temperature LED lamp bead.

[0012] After adopting the above scheme, when the output current of the DC dimmer of the utility model is at the maximum, the brightness and color temperature of the LED light source are at the maximum, and the working currents of the high color temperature light-emitting unit and the low color temperature light-emitting unit of the LED light source are the same; when the output current of the DC dimmer is gradually reduced, during this process, the working currents of the high color temperature light-emitting unit and the low color temperature light-emitting unit of the LED light source both decrease, thereby causing the voltage of the linear resistance element of the adjustment module of the low color temperature light-emitting unit to decrease, thereby making the total voltage of all low color temperature LED lamp beads of the low color temperature light-emitting unit lower than the total voltage of all high color temperature LED lamp beads of the high color temperature light-emitting unit, thus causing the working current of the low color temperature light-emitting unit to be greater than the working current of the high color temperature light-emitting unit, thereby making the brightness of the low color temperature light-emitting unit greater than the brightness of the high color temperature light-emitting unit, thereby reducing the overall brightness and color temperature of the LED light source; conversely, when the output current of the DC dimmer is gradually increased, the overall brightness and color temperature of the LED light source increase. Among them, since the voltage of the linear resistance element of the adjustment module of the low color temperature light-emitting unit changes linearly with the current, when the output current of the DC dimmer changes linearly, the overall brightness and color temperature of the LED light source can change linearly, thereby realizing linear adjustment of brightness and color temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the first embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the second embodiment of the present utility model.

[0015] Figure 3 This is a schematic diagram of the third embodiment of the present utility model.

[0016] Description of labels:

[0017] DC dimmer A,

[0018] LED light source B,

[0019] High color temperature light emitting unit 1, high color temperature LED lamp beads 11,

[0020] Low color temperature light emitting unit 2, low color temperature LED lamp bead 21, adjustment module 22, linear resistance element 221, compensation LED lamp bead 222. DETAILED DESCRIPTION

[0021] like Figures 1 to 3 As shown, the utility model discloses an LED brightness color temperature linear dimming circuit, which includes a DC dimmer A and at least one LED light source B; the output power of the DC dimmer A can be linearly adjusted, and the structure of the DC dimmer A is prior art and will not be repeated here; the LED light source B includes a high color temperature light-emitting unit 1 and a low color temperature light-emitting unit 2 arranged in parallel; the high color temperature light-emitting unit 1 includes a plurality of high color temperature LED lamp beads 11 connected in series, and the positive and negative poles of the high color temperature light-emitting unit 1 are respectively connected to the positive and negative poles of the DC dimmer A; the low color temperature light-emitting unit 2 includes a plurality of high color temperature LED lamp beads 11 connected in series An adjustment module 22 and multiple low color temperature LED lamp beads 21, the positive and negative poles of the low color temperature light-emitting unit 2 are respectively connected to the positive and negative poles of the DC dimmer A, the color temperature of the low color temperature LED lamp beads 21 is lower than the color temperature of the high color temperature LED lamp beads 11, the adjustment module 22 has at least one linear resistance element 221; the total rated power of all low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is lower than the total rated power of all high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B, so as to ensure that the adjustment module 22 can consume the excess power.

[0022] In the present invention, when the output current of the DC dimmer A is maximum, the brightness and color temperature of the LED light source B are maximum, and the working currents of the high color temperature light-emitting unit 1 and the low color temperature light-emitting unit 2 of the LED light source B are the same; when the output current of the DC dimmer A is gradually reduced, during this process, the working currents of the high color temperature light-emitting unit 1 and the low color temperature light-emitting unit 2 of the LED light source B are both reduced, thereby causing the voltage of the linear resistor element 221 of the adjustment module 22 of the low color temperature light-emitting unit 2 to decrease, thereby making the total voltage of all low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 lower than the total voltage of all high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 (that is, the total voltage of the high color temperature light-emitting unit 1), thus causing the working current of the low color temperature light-emitting unit 2 to be greater than the working current of the high color temperature light-emitting unit 1, thereby making the brightness of the low color temperature light-emitting unit 2 greater than the brightness of the high color temperature light-emitting unit 1, thereby causing the overall brightness and color temperature of the LED light source B to decrease; conversely, when the output current of the DC dimmer A is gradually increased, the overall brightness and color temperature of the LED light source B to increase. Among them, since the voltage of the linear resistor element 221 of the adjustment module 22 of the low color temperature light-emitting unit 2 changes linearly with the current, when the output current of the DC dimmer A changes linearly, the overall brightness and color temperature of the LED light source B can change linearly, thereby realizing linear adjustment of the brightness and color temperature.

[0023] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0024] Embodiment 1:

[0025] Cooperate Figure 1 As shown, in Embodiment 1 of the present utility model, the number of low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is one less than the number of high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B, and the number of low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 is one less than the number of high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1; the rated power of the low color temperature LED lamp beads 21 is lower than the rated power of the high color temperature LED lamp beads 11, so that the total rated power of all low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is lower than the total rated power of all high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B.

[0026] Cooperate Figure 1 As shown, in the first embodiment of the present utility model, the regulating module 22 includes a linear resistance element 221 connected in series with all the low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2, and the voltage of the linear resistance element 221 can change linearly with the working current of the low color temperature light-emitting unit 2.

[0027] Embodiment 2:

[0028] Cooperate Figure 2 As shown, in Embodiment 2 of the present utility model, the number of low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is one less than the number of high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B, and the number of low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 is one less than the number of high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1; the rated power of the low color temperature LED lamp beads 21 is lower than the rated power of the high color temperature LED lamp beads 11, so that the total rated power of all low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is lower than the total rated power of all high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B.

[0029] Cooperate Figure 2As shown, in the second embodiment of the present utility model, the adjustment module 22 includes a linear resistor element 221 and a compensation LED lamp bead 222 arranged in series, and the color temperature of the compensation LED lamp bead 222 is the same as the color temperature of the low color temperature LED lamp bead 21. The voltage of the linear resistor element 221 can change linearly with the working current of the low color temperature light emitting unit 2; at the same time, the arrangement of the compensation LED lamp bead 222 can make the number of lamp beads of the low color temperature light emitting unit 2 the same as the number of lamp beads of the high color temperature light emitting unit 1, so as to facilitate the matrix arrangement of the lamp beads of the LED light source B.

[0030] Embodiment three:

[0031] Cooperate Figure 3 As shown, in Example 3 of the present utility model, the number of low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is one less than the number of high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B, and the number of low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 is one less than the number of high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1; the rated power of the low color temperature LED lamp beads 21 is lower than the rated power of the high color temperature LED lamp beads 11, so that the total rated power of all low color temperature LED lamp beads 21 of the low color temperature light-emitting unit 2 of each LED light source B is lower than the total rated power of all high color temperature LED lamp beads 11 of the high color temperature light-emitting unit 1 of the LED light source B.

[0032] Cooperate Figure 3 As shown, in the third embodiment of the present utility model, the adjustment module 22 includes a linear resistor element 221 and a compensation LED lamp bead 222 arranged in parallel, and the color temperature of the compensation LED lamp bead 222 is the same as the color temperature of the low color temperature LED lamp bead 21. The voltage of the linear resistor element 221 can change linearly with the working current of the low color temperature light emitting unit 2; at the same time, the arrangement of the compensation LED lamp bead 222 can make the number of lamp beads of the low color temperature light emitting unit 2 the same as the number of lamp beads of the high color temperature light emitting unit 1, so as to facilitate the matrix arrangement of the lamp beads of the LED light source B.

[0033] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. An LED brightness and color temperature linear dimming circuit, characterized in that: comprising a DC dimmer and at least one LED light source; The LED light source comprises a high color temperature light emitting unit and a low color temperature light emitting unit arranged in parallel; The high color temperature light emitting unit comprises a plurality of high color temperature LED lamp beads connected in series, and the positive and negative electrodes of the high color temperature light emitting unit are respectively connected to the positive and negative electrodes of the DC dimmer; The low color temperature light emitting unit comprises a regulating module and a plurality of low color temperature LED lamp beads connected in series, the positive and negative electrodes of the low color temperature light emitting unit are respectively connected to the positive and negative electrodes of the DC dimmer, the color temperature of the low color temperature LED lamp beads is lower than the color temperature of the high color temperature LED lamp beads, and the regulating module has at least one linear resistance element; The total rated power of all low color temperature LED lamp beads of the low color temperature light-emitting unit of each LED light source is lower than the total rated power of all high color temperature LED lamp beads of the high color temperature light-emitting unit of the LED light source.

2. The LED brightness and color temperature linear dimming circuit according to claim 1, characterized in that: The number of low color temperature LED lamp beads in the low color temperature light emitting unit of each LED light source is one less than the number of high color temperature LED lamp beads in the high color temperature light emitting unit of the LED light source.

3. The LED brightness and color temperature linear dimming circuit according to claim 2, characterized in that: The regulating module comprises a linear resistance element and a compensation LED lamp bead which are arranged in series, and the color temperature of the compensation LED lamp bead is the same as the color temperature of the low color temperature LED lamp bead.

4. The LED brightness and color temperature linear dimming circuit as claimed in claim 2, characterized in that: The regulating module includes a linear resistor element and a compensation LED lamp bead arranged in parallel, and the color temperature of the compensation LED lamp bead is the same as the color temperature of the low color temperature LED lamp bead.

5. The LED brightness and color temperature linear dimming circuit according to claim 1 or 2, characterized in that: The regulating module includes a linear resistance element connected in series with all the low color temperature LED lamp beads of the low color temperature light emitting unit.

6. The LED brightness and color temperature linear dimming circuit according to claim 1 or 2, characterized in that: The rated power of the low color temperature LED lamp bead is lower than the rated power of the high color temperature LED lamp bead.

Images