Lighting circuit and lighting device

Abstract

The invention provides a lighting circuit and a lighting device. The lighting circuit includes: a first light source group; a second light source group; the power supply module is respectively connected with the first light source group and the second light source group and is used for supplying power to the first light source group and the second light source group; the voltage control circuit is connected with the power supply module and used for converting a first voltage output by the power supply module into a second voltage, and the first voltage is different from the second voltage; and the control module is respectively connected with the first light source group, the second light source group, the power supply module and the voltage control circuit, and the control module is used for enabling the power supply module to supply power to the first light source group at the first voltage and / or enabling the power supply module to supply power to the second light source group at the second voltage.

Description

Technical Field

[0001] This application relates primarily to the field of lighting, and more particularly to a lighting circuit and a lighting device. Background Technology

[0002] In the field of multifunctional lighting technology, lighting equipment typically integrates a primary lighting source and an auxiliary lighting source. The power supply voltage requirements of the primary and auxiliary lighting sources differ significantly; for example, primary lighting sources usually require a higher voltage, while auxiliary lighting sources often require a dedicated, lower voltage. This voltage conflict forces existing technologies to configure separate power supply systems for each functional light source. This design approach not only creates system architecture redundancy but also significantly increases overall cost. Summary of the Invention

[0003] This application addresses the aforementioned technical problems by providing a lighting circuit and lighting device that can configure the same power supply system for both the lighting source and auxiliary light source, thereby simplifying the system architecture and reducing costs.

[0004] To address the aforementioned technical problems, this application provides a lighting circuit and a lighting device. The lighting circuit includes: a first light source group; a second light source group; a power supply module connected to the first light source group and the second light source group respectively, for supplying power to the first light source group and the second light source group; a voltage control circuit connected to the power supply module, for converting a first voltage output by the power supply module into a second voltage, wherein the first voltage and the second voltage are different; and a control module connected to the first light source group, the second light source group, the power supply module, and the voltage control circuit respectively, the control module being used to cause the power supply module to supply power to the first light source group with the first voltage, and / or to cause the power supply module to supply power to the second light source group with the second voltage.

[0005] In one embodiment of this application, the voltage control circuit includes: a first switch, a first resistor, a second resistor, and a third resistor. The first resistor and the first switch are connected in series to form a first series branch, the second resistor is connected in parallel with the first series branch to form a first parallel structure, and the third resistor is connected in series with the first parallel structure.

[0006] In one embodiment of this application, the power module includes a bus, and the first light source group, the second light source group, the voltage control circuit, and the control module are respectively connected to the bus; the voltage control circuit includes: a first DC / DC module, which is respectively connected to the bus and the control module, and is used to convert the first voltage or the second voltage into a third voltage, so that the power module supplies power to the control module with the third voltage.

[0007] In one embodiment of this application, the voltage control circuit includes: a second DC / DC module connected to the power supply module and the second light source group respectively, for converting the first voltage into the second voltage; and a third DC / DC module connected to the power supply module and the control module respectively, for converting the first voltage into a third voltage, so that the power supply module supplies power to the control module with the third voltage.

[0008] In one embodiment of this application, the second light source group includes a plurality of second light sources, and the lighting circuit further includes an eye training control module, which is connected to the power module, the plurality of second light sources and the control module respectively, for making the plurality of second light sources work according to a preset mode.

[0009] In one embodiment of this application, the lighting circuit further includes: a plurality of power management chips supporting zero-code communication, wherein the plurality of power management chips are connected to the eye training control module, and the plurality of power management chips are connected to the plurality of second light sources in a one-to-one correspondence.

[0010] In one embodiment of this application, the preset mode includes any one of preset order, preset color, and preset time.

[0011] In one embodiment of this application, the lighting circuit further includes a second switch, a third switch, and a fourth switch, which are respectively connected to the control module. The first light source group includes a first sub-light source group and a second sub-light source group. The first sub-light source group is connected to the second switch, the second sub-light source group is connected to the third switch, and the second light source group is connected to the fourth switch.

[0012] To address the aforementioned technical problems, this application also provides a lighting device, comprising: a lighting circuit as described above; a lamp head, the lamp head including a lamp head cover and a lamp head bracket, a first light source group disposed on the lamp head bracket and / or the lamp head cover, and a second light source group disposed on a first surface of the lamp head cover.

[0013] In one embodiment of this application, the first light source group includes a first sub-light source group and a second sub-light source group, the lamp head cover includes a second surface opposite to the first surface, the first sub-light source group is disposed on the second surface, and the second sub-light source group is disposed on the inner side of the lamp head bracket.

[0014] In one embodiment of this application, the second light source group includes a third sub-light source group, which includes a plurality of third sub-light sources arranged sequentially around the edge of the first surface. When the third sub-light source group is in operation, it is configured to change the color of each third sub-light source sequentially in a clockwise or counterclockwise direction.

[0015] In one embodiment of this application, the second light source group further includes a fourth sub-light source group, which includes a plurality of fourth sub-light sources. The fourth sub-light source group is disposed at the edge of the first surface, and the plurality of fourth sub-light sources are symmetrically arranged with the geometric center of the first surface as the center. When the fourth sub-light source group is working, it is configured to change the color of each fourth sub-light source sequentially in a clockwise or counterclockwise direction.

[0016] In one embodiment of this application, when the third sub-light source group is working, the fourth sub-light source group is programmed to work in coordination with the third sub-light source group, and when the fourth sub-light source group is working, the third sub-light source group is configured to be constantly lit.

[0017] In one embodiment of this application, the lamp head further includes a light-diffusing plate and a lamp head base plate. The lamp head base plate is disposed close to the first surface. The lamp head cover plate includes a main body and an edge bent toward the first surface. The light-diffusing plate is disposed between the lamp head base plate and the edge, so that the projection of the light from the third sub-light source group toward the lamp head base plate falls on the light-diffusing plate.

[0018] This application utilizes a voltage control circuit to convert the first voltage output from the power module into a second voltage, enabling a single power supply system to power light source groups with different voltage requirements. This solves the problem of needing to configure independent power supplies for light sources with different voltage requirements in traditional solutions, simplifying the system architecture and reducing hardware costs. By setting up a control module, it is possible to select to power the first light source group with the first voltage and / or the second light source group with the second voltage, achieving flexible switching of power supply modes. Attached Figure Description

[0019] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of this application. In the drawings: Figure 1 This is a simplified block diagram of a lighting circuit according to an embodiment of this application; Figure 2 This is a circuit diagram of a lighting circuit according to an embodiment of this application; Figure 3 This is a simplified block diagram of a lighting circuit according to another embodiment of this application; Figure 4 yes Figure 2 An enlarged schematic diagram of region A in the illustrated embodiment; Figure 5 yes Figure 2 The timing diagram of the lighting circuit in the embodiment shown is as follows; Figure 6This is a schematic diagram of a lighting device according to an embodiment of this application; Figure 7 It shows Figure 6 An exploded view of the lamp holder structure in the embodiment shown; Figure 8 This is a schematic diagram of the lower light-emitting surface of a lamp holder according to an embodiment of this application; Figure 9 This is a front view of the structure of a lamp holder cover plate according to an embodiment of this application; Figure 10 This is a schematic diagram of the light source distribution of the third sub-light source group according to an embodiment of this application; Figure 11 This is a timing diagram of the light source operation according to an embodiment of this application; Figure 12 This is a flowchart of an eye training method according to an embodiment of this application. Detailed Implementation

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0021] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0026] It should be understood that when a component is referred to as "on another component," "connected to another component," "coupled to another component," or "in contact with another component," it can be directly on, connected to, coupled to, or in contact with that other component, or there may be an intervening component. In contrast, when a component is referred to as "directly on another component," "directly connected to," "directly coupled to," or "directly in contact with" another component, there is no intervening component. Similarly, when a first component is referred to as "electrically contacting" or "electrically coupled to" a second component, there is an electrical path between the first and second components that allows current to flow. This electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even if there is no direct contact between the conductive components.

[0027] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, various steps can be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0028] In recent years, with the increasing prevalence of myopia among students, various eye-protection lamps related to healthy eye use have entered the market. Currently, the design and research of related products are mainly limited to improving the quality of the light source, with a few products also focusing on enhancing eye training. However, existing eye-protection lamp designs have the following problems: 1) There is a significant difference in the power supply voltage requirements between the lighting source and the eye training light source. The lighting source usually requires a higher voltage power supply, while the eye training light source often requires a dedicated low voltage. This voltage conflict forces existing technical solutions to configure two independent power supply systems. This design not only creates redundancy in the system architecture but also significantly increases the overall cost. 2) During eye training, the brightness of different LEDs or light-emitting components in the eye training light source is controlled as a dynamic effect to guide eye training. Such a training process may cause negative emotions in users, especially children.

[0029] To solve the above-mentioned technical problems, this application provides a lighting circuit. Figure 1 A simplified block diagram of a lighting circuit according to an embodiment of this application is shown. Figure 1As shown, the lighting circuit 1 provided in this application includes: a first light source group 11; a second light source group 12; a power supply module 13, which is connected to the first light source group 11 and the second light source group 12 respectively, for supplying power to the first light source group 11 and the second light source group 12; a voltage control circuit 14, which is connected to the power supply module 13, for converting a first voltage output by the power supply module 13 into a second voltage, wherein the first voltage and the second voltage are different; and a control module 15, which is connected to the first light source group 11, the second light source group 12, the power supply module 13 and the voltage control circuit 14 respectively, for causing the power supply module 13 to supply power to the first light source group 11 with the first voltage, and / or causing the power supply module 13 to supply power to the second light source group 12 with the second voltage.

[0030] This application utilizes a voltage control circuit 14 to convert the first voltage output from the power module 13 into a second voltage, enabling a single power supply system to power light source groups with different voltage requirements. This solves the problem of needing to configure independent power supplies for light sources with different voltage requirements in traditional solutions, simplifying the system architecture and reducing hardware costs. By setting up a control module 15, it is possible to select to power the first light source group 11 with the first voltage and / or the second light source group 12 with the second voltage, achieving flexible switching of power supply modes.

[0031] In some embodiments, the first light source group 11 is a light source group for illumination, and the second light source group 12 is an auxiliary light source group for implementing assistive functions. The assistive functions include eye training functions and other assistive functions. In other embodiments, the first light source group 11 is a light source group for eye training, and the second light source group 12 is a light source group for illumination. This specification uses the example of the first light source group 11 being a light source group for illumination and the second light source group 12 being an auxiliary light source group for eye training for illustration.

[0032] In some embodiments, the first voltage and the second voltage are set according to actual usage requirements. In some embodiments, the first voltage is 48V to improve the illumination efficiency of the first light source group 24, which serves as the lighting source; the second voltage is 24V to reduce the energy consumption of the second light source group 12 while satisfying the eye training function of the second light source group 12.

[0033] This application does not limit the specific types of the power supply module 13 and the control module 15. In some embodiments, the power supply module 13 includes an isolated constant voltage power supply, and the control module 15 includes an MCU control module.

[0034] Next, we will combine Figure 2 and Figure 3 The present application provides an exemplary design scheme for the voltage control circuit.

[0035] Figure 2A circuit diagram of a lighting circuit according to an embodiment of this application is shown. The voltage control circuit 21, power supply module 22, first light source group 24, and second light source group 25 are outlined with dashed lines. A control module 23 is also shown. Figure 1 This is a specific implementation of the voltage control circuit 14, power supply module 13, first light source group 11, second light source group 12, and control module 15, hence different reference numerals are used. For example... Figure 2 As shown, in some embodiments, the voltage control circuit 21 includes: a first switch Q1, a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 and the first switch Q1 are connected in series to form a first series branch 211, the second resistor R2 is connected in parallel with the first series branch 211 to form a first parallel structure 212, and the third resistor R3 is connected in series with the first parallel structure 212. By setting the first switch Q1, the first resistor R1, the second resistor R2, and the third resistor R3, and by controlling the first switch Q1, the output voltage of the power module is switched.

[0036] Specifically, such as Figure 2As shown, in some embodiments, the power module 22 further includes: a rectification and filtering module 221 for rectifying the input electrical signal to generate a sinusoidal alternating current signal; a power factor correction module 222 for making the sinusoidal alternating current signal follow the voltage signal to improve the power factor; and a power circuit conversion module 223 for converting the DC signal processed by the power factor correction module 222 into electrical energy using a predetermined topology. The power circuit conversion module 223 includes an auxiliary power supply circuit 2231, which includes an auxiliary winding T1-2. The power module 22 also includes a secondary winding T1-1 that cooperates with the auxiliary winding T1-2. The auxiliary winding T1-2 and the secondary winding T1-1 are coupled through a transformer T1. The induced voltage generated by the auxiliary winding T1-2 supplies power to the power management chip U2, and the induced voltage generated by the secondary winding T1-1 is the output voltage of the power module 22, i.e., the voltage on the bus 224 of the power module 22. Since the power module 22 can output voltage in two states—a first voltage and a second voltage—the induced voltage range generated by the auxiliary winding T1-2 is relatively wide. Therefore, a voltage regulator circuit consisting of resistor R4, inductive reactance Z1, and switch Q5 is specifically configured in the auxiliary power supply circuit 2231. The voltage control circuit 21 includes a closed-loop feedback system, which comprises: an optocoupler U3 for transmitting an isolation signal to the power management chip U2; and an adjustable precision regulator U4 for generating a stable internal reference voltage Vref, which, after comparison with the external voltage Vfb, generates a signal that is transmitted to the primary side of the secondary winding T1-1 via the optocoupler U3. Depending on the conduction state of the first switch Q1, the output voltage VO of the power module 22 is sampled by a voltage divider network consisting of the first switch Q1, the first resistor R1, the second resistor R2, and the third resistor R3 to obtain different feedback voltages Vfb. This feedback voltage Vfb is compared with Vref generated by the adjustable precision regulator U4, and then the error signal is transmitted to the power management chip U2 on the primary side via the optocoupler U3. Afterward, the power management chip U2 changes the output voltage VO of the power module 22. Figure 2 In the circuit, when the first switch Q1 is turned on, the output voltage VO of the power module 22 can be calculated as VO = Vref. (1+(R3 (R1+R2)) / (R1 When the first switch Q1 is turned off, the output voltage VO of the power module 22 can be calculated as VO = Vref. (1+R3 / R2). The voltage control circuit 21 also includes resistor R5, capacitor C1 and resistor R6. Resistor R5 provides bias current for U3 and U4 to ensure that the devices operate in the linear region. The compensation network formed by capacitor C1 and resistor R6 is used to adjust the frequency characteristics of the control loop.

[0037] In some embodiments, the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 can be set according to the magnitudes of the first voltage and the second voltage. The first switch Q1 includes a MOSFET. In some embodiments, the conduction state of the first switch Q1 is controlled by the control module 23.

[0038] like Figure 2 As shown, in some embodiments, the power module 22 includes a bus 224, a first light source group 24, a second light source group 25, a voltage control circuit 21, and a control module 23, which are respectively connected to the bus 224. The voltage control circuit 21 includes a first DC / DC module 213, which is connected to the bus 224 and the control module 23, and is used to convert the first voltage or the second voltage into a third voltage so that the power module 22 supplies power to the control module 23 with the third voltage.

[0039] Figure 3 A simplified block diagram of a lighting circuit according to another embodiment of this application is shown. Figure 3 The power module 32, control module 33, first light source group 36, and second light source group 37 shown are respectively Figure 1 This is one specific implementation of the power supply module 13, control module 15, first light source group 11, and second light source group 12, hence different reference numerals are used. For example... Figure 3 As shown, in some embodiments, the voltage control circuit 31 includes a second DC / DC module 311 and a third DC / DC module 312. The second DC / DC module 311 is connected to the power supply module 32 and the second light source group 37 respectively, and is used to convert the first voltage into a second voltage. The third DC / DC module 312 is connected to the power supply module 32 and the control module 33 respectively, and is used to convert the first voltage into a third voltage, so that the power supply module 32 supplies power to the control module 33 with the third voltage.

[0040] In the above Figure 2 and Figure 3 In the embodiment shown, Figure 2 and Figure 3 The embodiments shown all implement the use of a second voltage to power the second light source group, and all use a DC / DC module to convert the output voltage of the power supply module into a third voltage to power the control module. In some embodiments, the third voltage is lower than the first voltage and the second voltage, and the second voltage is lower than the first voltage. By enabling the power supply module to power the control module with the third voltage and the second light source group with the second voltage, the circuit loss of the power supply module is reduced and the power supply efficiency is improved while meeting the operating requirements of the second light source group and the control module. Figure 2 and Figure 3 The difference is that, Figure 3 The illustrated embodiment converts the first voltage into a second voltage by using a second DC / DC module 311. Figure 2The illustrated embodiment converts the first voltage into a second voltage by setting a first switch Q1, a first resistor R3, a second resistor R4, and a third resistor R2. Compared to... Figure 3 The embodiment shown, Figure 2 The illustrated embodiment eliminates the need for a second DC / DC module 311, thereby reducing the cost of the voltage control circuitry. In some embodiments, the value of the third voltage can be set according to actual needs.

[0041] Figure 4 It shows Figure 2 An enlarged schematic diagram of region A in the illustrated embodiment. (See diagram below.) Figure 2 and Figure 4 As shown, in some embodiments, the second light source group 25 includes multiple second light sources 251, and the lighting circuit 2 further includes an eye training control module 26, which is connected to the bus 224 of the power module 22, the multiple second light sources 251, and the control module 23, respectively, for enabling the multiple second light sources 251 to operate according to a preset mode. In some embodiments, the lighting circuit 2 further includes multiple power management chips 27 supporting zero-code communication, which are connected to the eye training control module 26, and are connected one-to-one with the multiple second light sources 251. In some embodiments, the preset mode includes any one of a preset order, a preset color, and a preset time, wherein the preset order includes the lighting order of the multiple second light sources 251 and the color switching order of the multiple second light sources 251. By setting up the eye training control module 26, multiple power management chips 27 that support zero-code communication are connected one-to-one with multiple second light sources 251 in the second light source group 25. The eye training control module 26 sends encoded instructions to each power management chip 27 so that the multiple second light sources 251 can be lit in a preset order, preset color and preset time, thereby achieving the purpose of eye training.

[0042] like Figure 2 and Figure 4 As shown, in some embodiments, the second light source group 25 includes N RGB light sources, and the multiple second light sources 251 are respectively RGB light source 1, RGB light source 2...RGB light source N-1 and RGB light source N. N power management chips 27 are connected to their respective second light sources 251 through their ports. The eye training control module 26 sends coded commands to the power management chips 27 via a DATA line to control the second light source 251 corresponding to that power management chip 27. In some embodiments, each RGB light source can be a single LED or a combination of multiple LEDs, allowing for various color changes, such as 256 colors. In some embodiments, the second light source 251 may also include combinations of LEDs with more spectral types, such as RGBW, or fewer spectral types, such as RG or GB.

[0043] In some embodiments, the power management chip 27 may include a power management chip that supports return-to-zero code communication, such as the M16803. Since different power management chips are used in actual applications, the encoding rules may also differ. The DATA data can be written according to the chip rules corresponding to the receiving code of the model, so that the current of each RGB LED in the second light source 251 is controlled by the code, thereby enabling each second light source 251 to emit light of a preset color and color temperature.

[0044] In some embodiments, the eye control module 26 can also control the second light source group 25 via communication protocols such as I2C communication and SPI communication. In some embodiments, the second light source group 25 can also be directly controlled by the control module 23.

[0045] exist Figure 2 In the illustrated embodiment, a power management chip 27 with return-to-zero code reception capability is used. Due to cost considerations, commercially available power management chips 27 generally employ a 40V process and have a voltage rating of less than 48V, making them unsuitable for direct use with the same voltage as the first light source group 24. Therefore, in Figure 2 In the embodiment shown, 24V is used to power the second light source group 25 and the power management chip 27.

[0046] like Figure 2 As shown, in some embodiments, the lighting circuit 2 further includes a second switch Q2, a third switch Q3, and a fourth switch Q4, which are respectively connected to the control module 23. The first light source group 24 includes a first sub-light source group 241 and a second sub-light source group 242. The first sub-light source group 241 is connected to the second switch Q2. The second sub-light source group 241 is connected to the third switch Q3. The second light source group 242 is connected to the fourth switch Q4. The lighting circuit 2 controls the operating state of different light source groups by setting the second switch Q2, the third switch Q3, and the fourth switch Q4 connected to the control module 23. For example, Figure 2 As shown, in some embodiments, the first sub-light source group 241 and the second sub-light source group 242 each include a plurality of light-emitting diodes.

[0047] In some embodiments, the second switch Q2, the third switch Q3, and the fourth switch Q4 all include MOSFETs.

[0048] Figure 5 It shows Figure 2 The timing diagram of the lighting circuit 2 in the illustrated embodiment is shown. Figure 5 As shown, Figure 5The horizontal axis represents time, and the vertical axis represents voltage level. Waveform 51 shows the timing of the power module 22 switching voltage by controlling the first switch Q1; a high level represents an output voltage of 48V, and a low level represents an output voltage of 24V. Waveform 52 shows the timing of controlling the first sub-light source group 241 or the second sub-light source group 242; a high level represents the light source group being lit, and a low level represents the light source group being turned off. Waveform 53 shows the timing of the second light source group 25; a high level represents the eye training module 26 being running, and a low level represents the eye training module 26 being turned off. Figure 5 As shown, the control module 22 controls the operation of different light source groups by controlling the on / off states of the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4. When the first light source group 24 is working, i.e., the lighting circuit 2 is operating in lighting mode, the second switch Q2 and / or the second switch Q3 are on, the fourth switch Q4 is off to turn off the eye training module 26, and the first switch Q1 is on, allowing the power module 22 to supply power to the first light source group 24 at 48V. When in eye training mode, i.e., when the second light source group 25 is working, the fourth switch Q4 is on, enabling the eye training module 26 to operate, and the second light source group 25 to operate according to a preset mode. Simultaneously, the second switches Q2 and Q3 are off, and the first switch Q1 is off, allowing the power module 22 to supply power to the second light source group 25 at the second voltage. By setting the first switch Q1, the second switch Q2, the second switch Q3, and the fourth switch Q4, the lighting circuit 2 alternates between lighting mode and eye training mode.

[0049] In some embodiments, the control module 23 and the eye training control module 26 can interact. On one hand, the control module 23 can control and obtain the working state of the eye training control module 26; on the other hand, the eye training control module 26 can obtain instructions from the control module 23 to change the working state of the second light source group 25, for example, to change the working state to a preset mode.

[0050] like Figure 2 As shown, in some embodiments, the lighting circuit 2 further includes an auxiliary control module 28, which includes a voice module, a radar sensing module, an infrared remote control module, etc. The user can send commands to the control module 23 through the auxiliary control module 28, thereby controlling the operation of the first light source group 24 and the second light source group 25. Figure 2 As shown, the first DC / DC module 213 is also used to enable the power supply module 22 to supply power to the auxiliary control module 28 at a third voltage.

[0051] and Figure 2 same, Figure 3The illustrated embodiment also includes a power module 32, a control module 33, an eye training control module 34, an auxiliary control module 35, a first light source group 36, and a second light source group 37. The functions of each module and light source group are as follows: Figure 2 The same applies, and will not be described further here.

[0052] like Figure 3 As shown, in some embodiments, the lighting circuit 3 further includes a dimming control module 38 for adjusting the brightness or operating status of the first light source group 36.

[0053] To address the aforementioned issues, this application also provides a lighting device. Figure 6 A schematic diagram of a lighting device according to an embodiment of this application is shown. Figure 7 It shows Figure 6 An exploded view of the lamp holder structure in the embodiment shown.

[0054] like Figure 6 and Figure 7 As shown, the lighting device 6 includes: the lighting circuit as described above; and a lamp holder 61, wherein the lamp holder 61 includes a lamp holder cover 611 and a lamp holder bracket 612. A first light source group 62 is disposed on the lamp holder bracket 612 and / or the lamp holder cover 611. A second light source group (not shown) is disposed on the first surface 611a of the lamp holder cover 611. Figure 6 and Figure 7 As shown, in some embodiments, the first light source group 62 includes a first sub-light source group (not shown) and a second sub-light source group 621, and the lamp head cover plate 611 includes a second surface 611b opposite to the first surface 611a. The first sub-light source group is disposed on the second surface 611b, and the second sub-light source group 621 is disposed on the inner side of the lamp head bracket 612.

[0055] Figure 8 A schematic diagram of the lower light-emitting surface of a lamp holder according to an embodiment of this application is shown. Figure 6 and Figure 8 As shown, the lamp head 61 includes a lower light-emitting surface 61a and an upper light-emitting surface 61b. By placing the first sub-light source group on the second surface 611b, the upper light-emitting surface 61b can be used for illumination. The second sub-light source group 621 is disposed inside the lamp head bracket 612, so that the light-emitting surface 621a of the second sub-light source group 621 on the lower light-emitting surface 61a can be used for illumination. The light-emitting surfaces 63 and 64 of the second light source group can be used to realize other auxiliary functions, such as eye training. In some embodiments, by adjusting the position of the second light source group, the upper light-emitting surface 61 can also be used as the light-emitting surface of the eye training light source. This can be achieved by rotating the lamp head or reflecting off a wall, making it easier for the user to see the upper light-emitting surface 61.

[0056] In some embodiments, the second light source group includes a third sub-light source group (not shown), which includes a plurality of third sub-light sources arranged sequentially around the edge of the first surface 611a. When the third sub-light source group is in operation, it is configured to change the color of each third sub-light source sequentially in a clockwise or counterclockwise direction.

[0057] like Figure 8 As shown, by sequentially arranging multiple third sub-light sources around the edge of the first surface 611a, the luminous surface 63 of the third sub-light source group surrounds the edge of the lower luminous surface 61a. When the color of each third sub-light source is changed sequentially in a clockwise or counterclockwise direction, the user can follow the direction of the color change of the luminous surface 63 to complete eye movement.

[0058] In some embodiments, the second light source group further includes a fourth sub-light source group (not shown), which comprises multiple fourth sub-light sources. The fourth sub-light source group is positioned at the edge of the first surface 611a, and the multiple fourth sub-light sources are symmetrically arranged about the geometric center of the first surface 611a. When operating, the fourth sub-light source group is configured to sequentially change the color of each fourth sub-light source in a clockwise or counterclockwise direction. By positioning the fourth sub-light source group at the edge of the first surface 611a and symmetrically arranging the multiple fourth sub-light sources about the geometric center of the first surface 611a, the distance between the multiple fourth sub-light sources is maximized, resulting in varying distances between the user's eye and the multiple fourth sub-light sources. When the color of each fourth sub-light source is sequentially changed in a clockwise or counterclockwise direction, the user follows the direction of the color change to train their ability to see near and far objects.

[0059] like Figure 8 As shown, in some embodiments, the lower light-emitting surface 61a is rectangular in shape, and the light-emitting surfaces 64 of the fourth sub-light source group are distributed at the four corners of the lower light-emitting surface 61a. In some embodiments, this application does not impose specific limitations on the shape of the lower light-emitting surface 61a.

[0060] like Figure 7As shown, in some embodiments, the lamp head further includes a light-diffusing plate 613 and a lamp head base plate 614. The lamp head base plate 614 is disposed near the first surface 611a. The lamp head cover plate 611 includes a main body 6111 and an edge 6112 bent towards the first surface 611a. The light-diffusing plate 613 is disposed between the lamp head base plate 614 and the edge 6112, so that the projection of the light from the third sub-light source group toward the lamp head base plate 614 falls on the light-diffusing plate 613. In some embodiments, the light-diffusing plate 613 includes a training light source prism plate, used to make the light from the second light source group more evenly distributed on the lower light-emitting surface 61a during eye training, preventing user dizziness. In the above embodiment, after the lamp head cover plate 611 is bent, a certain gap is generated between the edge 6112 and the lamp head base plate 614 on the surface where the lamp head base plate 614 is located. This gap can be used to embed the light-diffusing plate 613. After embedding, the light-diffusing plate 613 can be fixed between the lamp head base plate 614 and the lamp head cover plate 611 by adhesive.

[0061] like Figure 7 As shown, in some embodiments, the lamp head 61 further includes a light-diffusing plate 615 to make the light from the second sub-light source group more evenly distributed on the emitting surface 621a. The lamp head 61 also includes a rotating platform 601, a crossbar cover plate 616, and a lamp head crossbar 617. The crossbar cover plate 616 is fixed to the lamp head crossbar 617 by screw holes. A space is reserved between the crossbar cover plate 616 and the lamp head crossbar 617 to facilitate the placement of wire ends after wiring by the user, making it convenient for the user to assemble. Both the lamp head crossbar 617 and the rotating platform 601 are used to mount the lamp head 61, so that the lamp head 61 can be adjusted horizontally or vertically, allowing users to experience eye training from multiple angles. The lamp head 61 also includes a buffer pad 618, reflective paper 619, a light guide plate 602, and a diffuser plate 603 installed in the lamp head bracket 612. The second sub-light source group 621 is installed on the inner side wall of the lamp head bracket 612, and the light reaches the lower emitting surface 61a through the light guide plate 601.

[0062] Figure 9 A front view of the structure of a lamp holder cover 611 according to an embodiment of this application is shown. Figure 12 As shown, in some embodiments, positioning grooves 91 for the fourth sub-light source group are respectively provided at the four corners of the lamp head cover plate 611 to facilitate the installation of the fourth sub-light source group. Positioning grooves 92 for the third sub-light source group are arranged around the inside of the lamp head cover plate 611 to facilitate the installation of the third sub-light source group. An installation groove 93 is provided inside the lamp head cover plate for installing the first sub-light source group, and a rotating platform mounting hole 94 is used to install the rotating platform 615. A lamp head cover mounting hole 95 is used to connect the lamp head cover plate 611 and the lamp head bracket 612.

[0063] like Figure 6 As shown, in some embodiments, the lighting device 6 includes a floor lamp. Compared to traditional desktop lamps, floor lamps are larger and have taller lamp posts, making them more suitable for eye exercises.

[0064] According to relevant research, in addition to eye movement, viewing different colors can also train eye muscles and influence different emotions. For example, viewing green light can relax the ciliary muscle, viewing red light can regulate the ciliary muscle, and viewing yellow light can create a comfortable visual environment and stabilize emotions. This application achieves a dynamic effect by sequentially changing the color of each light source to guide eye training, which not only improves the effectiveness of eye training but also provides users with a better emotional experience.

[0065] It is worth noting that in the above embodiments, this application achieves dynamic effects to guide eye training by switching the color of each light source. During the training process, there is no on / off process for each light source. Specifically, the process of eye training through color switching or on / off switching can be combined with... Figure 10 understand. Figure 10 A schematic diagram of the light source distribution of the third sub-light source group according to an embodiment of this application is shown. Figure 10 As shown, the third sub-light source group includes light sources 1001 to 1014. When eye training is performed by switching between on and off states, only some of light sources 1001 to 1014 are illuminated, and the user's gaze follows the illuminated light sources to perform eye exercises. The on / off switching process is as follows: at time t1, light sources 1001 to 1003 are illuminated; at time t2, light sources 1001 to 1003 are off, and light sources 1004 to 1006 are illuminated; at time t3, light sources 1004 to 1006 are off, and light sources 1007 to 1010 are illuminated; at time t4, light sources 1007 to 1010 are off, and light sources 1011 to 1014 are illuminated. When eye training is performed by switching colors, all light sources 1001 to 1014 are always illuminated. Within one training cycle, the user's gaze follows the light sources that are switching colors to perform eye exercises. The color switching process is as follows: at time t1, light sources 1001 through 1003 are all yellow; at time t2, light sources 1001 through 1003 turn green, while the other light sources remain yellow; at time t3, light sources 1001 through 1006 turn green, while the other light sources remain yellow; at time t4, light sources 1001 through 1010 turn green, while the other light sources remain yellow; at time t5, light sources 1001 through 1014 all turn green. At the next time step, light sources 1001 through 1003 can be switched to a color other than green to continue eye training.

[0066] Compared to guiding eye training by turning each light source on and off or switching it on and off, this application significantly improves the user experience by using color switching for eye training. This is because in the dark, if the training light source flickers due to on / off switching, it may cause negative emotions for users, especially children.

[0067] In some embodiments, when the third sub-light source group is working, the fourth sub-light source group is incorporated into the third sub-light source group and works collaboratively with it. When the fourth sub-light source group is working, the third sub-light source group is configured to be constantly lit, serving as the background color for the fourth sub-light source group. This enhances the overall brightness and contrast of the light source during eye training, improving the user experience. It should be understood that although in the above embodiments, the fourth sub-light source group is incorporated into the third sub-light source group and works collaboratively with it, in some embodiments, the third and fourth sub-light sources can also work independently. When the third sub-light source group is working, the fourth sub-light source group can still be configured to be constantly lit, serving as the background color for the third sub-light source group.

[0068] Figure 11 A timing diagram of the light source operation according to an embodiment of this application is shown, as follows: Figure 10 As shown, Figure 11 The horizontal axis represents time, and the vertical axis represents level. (Combined) Figure 3 and Figure 10 Waveform 1101 represents the working timing of the second sub-light source group 362, with a high level indicating its working state; waveform 1102 represents the working timing of the third sub-light source group 371, with a high level indicating its working state; waveform 1103 represents the working timing of the fourth sub-light source group 372, with a high level indicating its working state. In eye training mode, time t1 to t2 is for eye rotation training, and time t3 to t6 is for near and far vision training. From time t0 to t6, the second sub-light source group 362 is in the off state. From time t0 to t1, the third sub-light source group 371 rotates one full cycle using yellow light, that is, it sequentially switches the light source to yellow light clockwise. From time t1 to t2, the third sub-light source group 371 rotates one full cycle clockwise using green light. From time t3 to t6, the third sub-light source group 371 uses a static green light constant-on setting to provide background lighting for the fourth sub-light source group 372. From time t0 to time t2, the fourth sub-light source group 372, as part of the third sub-light source group 371, rotates clockwise together with the third sub-light source group 371. From time t3 to time t6, the light source in the upper left corner of the lamp head cover 611 in the fourth sub-light source group 372 switches to red, and the light source in the lower right corner of the lamp head cover 611 switches to red. Then, the red light in the upper right corner lights up in sequence, followed by the red light in the lower left corner, thus completing the process of seeing far and near.

[0069] This application also provides a method for eye training. Figure 12 A flowchart illustrating an eye training method according to an embodiment of this application is shown. Figure 12As shown, the eye training process includes: Step S121: Preset time, i.e., the preset time for eye training. Then proceed to Step S122: Warning light illuminates. Used to remind you that the eye training time has arrived. At this time, you can choose to proceed to Step S123 or Step S125. Step S123: Select to continue learning. Turn off the warning light and proceed to Step S124, continuing the previous lighting mode. Step S125: Select eye training mode. Select a specific training mode and proceed to Step S126. Step S126: Enter the preset eye training mode. Then, steps S127 to S129 can be executed sequentially. The execution order between steps S128 and S129 can also be interchanged. Step S127: Play prompt sound and eye exercise music. Step S128: Make the third sub-light source group change clockwise or counterclockwise along the lamp head according to the preset order and preset color. That is, control the light source in the third sub-light source group according to the preset order and preset color. Step S129: The fourth sub-light source group is rotated clockwise or counterclockwise along the lamp head according to a preset order and preset color. That is, the light sources in the fourth sub-light source group are controlled according to the preset order and preset color. After either step S128 or S129 is completed, the user can choose to return to step S124. Alternatively, the user can return to step S124 after both steps S128 and S129 are completed.

[0070] The lighting circuit and lighting device of this application use RGB light sources as the eye training light source (second light source group). The resulting dynamic effects not only allow users to train their eye movements but also influence eye muscles through different spectra of visible light, achieving the purpose of relaxing the eyes and mind. The eye training light source used in this application achieves dynamic effects through color changes, which provides a better user experience and is less likely to generate negative emotions compared to dynamic effects achieved by switching between on and off. The eye training in this application can also be combined with auxiliary functions such as learning timers and eye exercise music, making it easier for users to accept and quickly adapt to new functions. The lighting circuit of this application improves work efficiency and reduces product costs.

[0071] It should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0072] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in this application are approximate values, which may be changed according to the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit preservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this application are approximate values, in specific embodiments, such numerical values ​​are set as precisely as feasible.

Claims

1. An illumination circuit, characterized by The lighting circuit comprises: a first light source group; a second light source group; a power module connected with the first light source group and the second light source group respectively, for supplying power to the first light source group and the second light source group; a voltage control circuit connected with the power module, for converting a first voltage output by the power module into a second voltage, wherein the first voltage and the second voltage are different; and a control module connected with the first light source group, the second light source group, the power module and the voltage control circuit respectively, the control module being configured to cause the power module to supply power to the first light source group at the first voltage and / or to supply power to the second light source group at the second voltage.

2. The lighting circuit of claim 1, wherein, The voltage control circuit comprises a first switch, a first resistor, a second resistor and a third resistor, the first resistor and the first switch being connected in series to form a first series branch, the second resistor being connected in parallel with the first series branch to form a first parallel structure, and the third resistor being connected in series with the first parallel structure.

3. The lighting circuit of claim 1, wherein, The power module comprises a bus, and the first light source group, the second light source group, the voltage control circuit and the control module are connected with the bus respectively. The voltage control circuit comprises a first DC / DC module connected with the bus and the control module respectively, for converting the first voltage or the second voltage into a third voltage, so that the power module supplies power to the control module at the third voltage.

4. The lighting circuit of claim 1, wherein, The voltage control circuit comprises: a second DC / DC module connected with the power module and the second light source group respectively, for converting the first voltage into the second voltage; and a third DC / DC module connected with the power module and the control module respectively, for converting the first voltage into a third voltage, so that the power module supplies power to the control module at the third voltage.

5. The lighting circuit of claim 1, wherein, The second light source group comprises a plurality of second light sources, and the lighting circuit further comprises an eyeball training control module connected with the power module, the plurality of second light sources and the control module respectively, for causing the plurality of second light sources to work in a preset mode.

6. The lighting circuit of claim 5, wherein, The lighting circuit further comprises a plurality of power management chips supporting zero-return code communication, the plurality of power management chips being connected with the eyeball training control module, and the plurality of power management chips and the plurality of second light sources being connected in a one-to-one correspondence.

7. The lighting circuit of claim 5, wherein, The preset mode comprises any of a preset sequence, a preset color and a preset time.

8. The lighting circuit of claim 1, wherein, The lighting circuit further comprises a second switch, a third switch and a fourth switch, the second switch, the third switch and the fourth switch being connected with the control module respectively, the first light source group comprising a first sub-light source group and a second sub-light source group, the first sub-light source group being connected with the second switch, the second sub-light source group being connected with the third switch, and the second light source group being connected with the fourth switch.

9. An illumination device, characterized by The lighting circuit comprises: any one of claims 1-8. The lamp head comprises a lamp head cover plate and a lamp head support, the first light source group is arranged on the lamp head support and / or the lamp head cover plate, and the second light source group is arranged on the first surface of the lamp head cover plate.

10. The illumination device of claim 9, wherein, The first light source group comprises a first sub light source group and a second sub light source group, the lamp head cover plate comprises a second surface opposite to the first surface, the first sub light source group is arranged on the second surface, and the second sub light source group is arranged on the inner side of the lamp head support.

11. The illumination device of claim 9, wherein, The second light source group comprises a third sub light source group, the third sub light source group comprises a plurality of third sub light sources, the plurality of third sub light sources are arranged in sequence around the edge of the first surface, and the third sub light source group is configured to change the color of each third sub light source in sequence in a clockwise direction or an anticlockwise direction when working.

12. The illumination device of claim 11, wherein, The second light source group further comprises a fourth sub light source group, the fourth sub light source group comprises a plurality of fourth sub light sources, the fourth sub light source group is arranged on the edge of the first surface, and the plurality of fourth sub light sources are arranged in a central symmetry with the geometric center of the first surface as the center; the fourth sub light source group is configured to change the color of each fourth sub light source in sequence in a clockwise direction or an anticlockwise direction when working.

13. The illumination device of claim 12, wherein, When the third sub light source group works, the fourth sub light source group is integrated into the third sub light source group and the third sub light source group works cooperatively, and when the fourth sub light source group works, the third sub light source group is configured to be always on.

14. The illumination device of claim 11, wherein, The lamp head further comprises a light homogenizing plate and a lamp head bottom plate, the lamp head bottom plate is arranged close to the first surface, the lamp head cover plate comprises a main body and an edge bent towards the first surface, and the light homogenizing plate is arranged between the lamp head bottom plate and the edge to make the projection of the light rays of the third sub light source group towards the direction of the lamp head bottom plate fall on the light homogenizing plate.

Images