A method, apparatus and system for mixing cool and warm color temperatures
By acquiring the warm and cool color temperatures and illuminance of the lamps when they are fully lit, and combining this with the critical color temperature to calculate the illuminance value corresponding to the target color temperature, the light output of the lamps is controlled. This solves the problem of complex and inefficient mixing of warm and cool color temperatures in existing technologies, and achieves rapid target color mixing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGZHOU YAJIANG PHOTOELECTRIC EQUIP CO LTD
- Filing Date
- 2022-12-22
- Publication Date
- 2026-05-26
Smart Images
Figure CN115866835B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of LEDs, and more particularly to a method, apparatus, and system for mixing warm and cool color temperatures. Background Technology
[0002] In warm and cool white LED lighting fixtures, to achieve multi-color temperature output, it is necessary to mix cool and warm color temperatures in different proportions to obtain the desired mixed color temperature. Current methods typically involve first mixing the colors to be mixed (warm and cool) in a certain ratio, then continuously adjusting the mixing ratio using PWM pulse matching to ultimately achieve the desired color temperature. This method is complex and inefficient. Therefore, there is an urgent need for a method that can quickly achieve the mixing of any color temperature, thus improving the efficiency of color temperature mixing. Summary of the Invention
[0003] This invention provides a method, apparatus, and system for mixing warm and cool color temperatures to solve the technical problems of complex and inefficient mixing processes of warm and cool color temperatures in existing technologies.
[0004] To address the aforementioned technical problems, embodiments of the present invention provide a method for mixing warm and cool color temperatures, comprising the following steps:
[0005] Obtain the first color temperature and first illuminance of the lamp when the warm color temperature is fully lit, and the second color temperature and second illuminance when the cool color temperature is fully lit;
[0006] Obtain the critical color temperature when both the warm and cool color temperatures of the luminaire are fully illuminated simultaneously;
[0007] Obtain the target color temperature of the target color of the lamp, and compare the target color temperature with the first color temperature, the second color temperature and the critical color temperature respectively;
[0008] When the target color temperature is greater than the first color temperature and less than the critical color temperature, the first target illuminance is calculated based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance to obtain the warm color temperature corresponding to the target color temperature and the cool color temperature corresponding to the target color temperature when the first illuminance is used; the luminaire is controlled to emit light according to the first illuminance and the first target illuminance to obtain the target color;
[0009] When the target color temperature is greater than the critical color temperature and less than the second color temperature, the second target illuminance is calculated based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance, and the second target illuminance is calculated for the cool color temperature corresponding to the target color temperature and the warm color temperature corresponding to the target color temperature. The luminaire is controlled to emit light according to the second illuminance and the second target illuminance to obtain the target color.
[0010] As a preferred embodiment, the step of calculating the first target illuminance of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance, based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance, includes:
[0011] Calculate the first target illuminance E1 of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance using the following formula:
[0012]
[0013] Wherein, Tw is the first color temperature, Tcw is the critical color temperature, Tx is the target color temperature, and Ec is the second illuminance.
[0014] As a preferred embodiment, the step of calculating the second target illuminance of the warm color temperature corresponding to the target color temperature when the cool color temperature corresponding to the target color temperature is the second illuminance, based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance, includes:
[0015] Calculate the second target illuminance E2 of the warm color temperature corresponding to the target color temperature when the second illuminance is the same for the cool color temperature corresponding to the target color temperature:
[0016]
[0017] Where Tc is the second color temperature and Ew is the first illuminance.
[0018] As a preferred embodiment, the controlled luminaire emits light according to the first illuminance and the first target illuminance to obtain the target color, including:
[0019] The illuminance of the warm color temperature of the lamp is set as the first illuminance, and the illuminance of the cool color temperature is gradually adjusted from zero to the first target illuminance to obtain the target color.
[0020] As a preferred embodiment, the controlled luminaire emits light according to the second illuminance and the second target illuminance to obtain the target color, including:
[0021] The cool color temperature of the lamp is controlled as the second illuminance, and the illuminance of the warm color temperature is gradually adjusted from the first illuminance to the second target illuminance to obtain the target color.
[0022] As a preferred embodiment, after obtaining the target color, the method further includes:
[0023] The actual color temperature of the lamp when it emits light according to the target color temperature is obtained. When there is a deviation between the actual color temperature and the target color temperature, the first target illuminance and the second target illuminance are corrected for the deviation.
[0024] Based on the above embodiments, another embodiment of the present invention provides a device for mixing warm and cool color temperatures, including: a color temperature and illuminance acquisition module, a critical color temperature acquisition module, a target color temperature comparison module, and a target color generation module;
[0025] The color temperature and illuminance acquisition module is used to acquire the first color temperature and first illuminance when the warm color temperature of the lamp is fully lit, and the second color temperature and second illuminance when the cool color temperature is fully lit, and transmit the acquired first color temperature, first illuminance, second color temperature and second illuminance to the target color temperature comparison module.
[0026] The critical color temperature acquisition module is used to acquire the critical color temperature when the warm color temperature and cool color temperature of the lamp are simultaneously fully lit, and transmit the acquired critical color temperature to the target color temperature comparison module.
[0027] The target color temperature comparison module is used to obtain the target color temperature of the target color of the lamp, compare the target color temperature with the first color temperature, the second color temperature and the critical color temperature respectively, and transmit the comparison result to the target color generation module.
[0028] The target color generation module is used to calculate, based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance, a first target illuminance for the warm color temperature corresponding to the target color temperature when the target color temperature is greater than a first color temperature and less than a critical color temperature, and a first target illuminance for the cool color temperature corresponding to the target color temperature when the target color temperature is the first illuminance; and to control the luminaire to emit light based on the first illuminance and the first target illuminance to obtain the target color. When the target color temperature is greater than a critical color temperature and less than a second color temperature, the module calculates, based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance, a second target illuminance for the warm color temperature corresponding to the target color temperature when the target color temperature is the second illuminance; and to control the luminaire to emit light based on the second illuminance and the second target illuminance to obtain the target color.
[0029] Based on the above embodiments, another embodiment of the present invention provides a system for mixing warm and cool color temperatures, including: a lamp, an external detection device for the lamp, and the mixing device for warm and cool color temperatures described in the above embodiments;
[0030] The lamp is used to emit light according to the target color temperature;
[0031] The external detection device for the lamp is used to collect the first color temperature and first illuminance when the warm color temperature of the lamp is fully lit, the second color temperature and second illuminance when the cool color temperature of the lamp is fully lit, the critical color temperature when both the warm and cool color temperatures are fully lit, and the actual color temperature when emitting light according to the target color temperature. The device then transmits the first color temperature, first illuminance, second color temperature, second illuminance, critical color temperature, and actual color temperature to the mixing device for the warm and cool color temperatures.
[0032] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:
[0033] In existing technologies, the desired target color temperature is achieved by mixing warm and cool color temperatures in a specific ratio and continuously adjusting this ratio. This invention, however, compares the target color temperature with the first color temperature when the warm color is fully illuminated, the second color temperature when the cool color is fully illuminated, and the critical color temperature when both warm and cool colors are simultaneously fully illuminated. Based on the target color temperature range, it controls the illuminance value of the other color temperature while ensuring that one of the warm or cool color temperatures is fully illuminated, thus obtaining the desired target color. Compared to existing technologies, this invention controls one of the warm or cool color temperatures to be fully illuminated, requiring only the adjustment of the illuminance value of the other color temperature. This single color temperature adjustment is sufficient to achieve the desired target color, providing a simple and rapid method for mixing target color temperatures and improving the efficiency of color temperature mixing. Attached Figure Description
[0034] Figure 1 This is a schematic flowchart of a method for mixing warm and cool color temperatures according to an embodiment of the present invention;
[0035] Figure 2 This is a schematic diagram of the structure of a mixing device for warm and cool color temperatures provided in an embodiment of the present invention;
[0036] Figure 3 This is a schematic diagram of the structure of a mixed warm and cool color temperature system provided in an embodiment of the present invention; Detailed Implementation
[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0038] Example 1
[0039] Please refer to Figure 1 The above is a flowchart illustrating a method for mixing warm and cool color temperatures according to an embodiment of the present invention. The method includes the following specific steps:
[0040] S1. Obtain the first color temperature and first illuminance of the lamp when the warm color temperature is fully lit, and the second color temperature and second illuminance when the cool color temperature is fully lit.
[0041] Obtain the first illuminance Ew and first color temperature Tw when the warm color temperature W of the lamp is fully lit, and the second illuminance Ec and second color temperature Tc when the cool color temperature C is fully lit.
[0042] S2. Obtain the critical color temperature when both the warm and cool color temperatures of the lamp are fully lit simultaneously;
[0043] Obtain the critical color temperature Tcw when both the warm color temperature W and the cool color temperature C of the lamp are fully illuminated.
[0044] S3. Obtain the target color temperature of the target color of the lamp, and compare the target color temperature with the first color temperature, the second color temperature and the critical color temperature respectively;
[0045] Using the critical color temperature Tcw as the dividing line, two color temperature intervals are defined: the first interval is from the first color temperature Tw to the critical color temperature Tcw, and the second interval is from the critical color temperature Tcw to the second color temperature Tc. The target color temperature Tx of the lamp's target color is obtained, and then compared with the first color temperature Tw, the second color temperature Tc, and the critical color temperature Tcw to determine the corresponding color temperature interval.
[0046] S4. When the target color temperature is greater than the first color temperature and less than the critical color temperature, calculate the first target illuminance of the warm color temperature corresponding to the target color temperature when the target color temperature is the first illuminance, based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance; control the lamp to emit light according to the first illuminance and the first target illuminance to obtain the target color.
[0047] Specifically, the step of calculating the first target illuminance of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance, based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance, includes: calculating the first target illuminance E1 of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance, according to the following formula:
[0048]
[0049] Wherein, Tw is the first color temperature, Tcw is the critical color temperature, Tx is the target color temperature, and Ec is the second illuminance.
[0050] Specifically, the control of the luminaire to emit light according to the first illuminance and the first target illuminance to obtain the target color includes: controlling the warm color temperature of the luminaire as the first illuminance, and gradually adjusting the illuminance of the cool color temperature from zero to the first target illuminance to obtain the target color.
[0051] When the target color temperature Tx is in the first color temperature range, i.e., Tw < Tx < Tcw, the warm color temperature W of the luminaire is kept fully lit, i.e., the warm color temperature W is controlled as the first illuminance. The illuminance of the cool color temperature C is gradually increased, allowing any target color temperature Tx within this range to be freely adjusted. Within this color temperature range, the relationship between the change in illuminance of the cool color temperature C and the target color temperature Tx tends to be linear. Based on the relationship between the illuminance of the cool color temperature C and the target color temperature Tx in both off and full-on states, the calculated value of the first target illuminance E1 required for mixing the cool color temperature C at any target color temperature Tx can be obtained:
[0052]
[0053] Based on the target color temperature Tx and the above formula, the first target illuminance of the cool color temperature corresponding to the target color temperature Tx can be obtained when the warm color temperature color W is fully bright.
[0054] When the target color temperature is greater than the critical color temperature and less than the second color temperature, the second target illuminance is calculated based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance, and the second target illuminance is calculated for the cool color temperature corresponding to the target color temperature and the warm color temperature corresponding to the target color temperature. The luminaire is controlled to emit light according to the second illuminance and the second target illuminance to obtain the target color.
[0055] Specifically, the step of calculating the second target illuminance of the warm color temperature corresponding to the target color temperature when the cool color temperature corresponding to the target color temperature is the second illuminance, based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance, includes: calculating the second target illuminance E2 of the warm color temperature corresponding to the target color temperature when the cool color temperature corresponding to the target color temperature is the second illuminance, according to the following formula:
[0056]
[0057] Where Tc is the second color temperature and Ew is the first illuminance.
[0058] Specifically, the controlled luminaire emits light according to the second illuminance and the second target illuminance to obtain the target color, including:
[0059] The cool color temperature of the lamp is controlled as the second illuminance, and the illuminance of the warm color temperature is gradually adjusted from the first illuminance to the second target illuminance to obtain the target color.
[0060] When the target color temperature Tx is in the second color temperature range, i.e., Tc > Tx > Tcw, the cool color temperature C of the luminaire is kept at full brightness, i.e., the cool color temperature C is controlled to be the second illuminance, and the illuminance of the warm color temperature W of the luminaire is gradually reduced. This allows any target color temperature Tx within this color temperature range to be freely adjusted. Within this color temperature range, the relationship between the change in the second target illuminance E2 of the warm color temperature W and the target color temperature Tx satisfies:
[0061]
[0062] Based on the target color temperature Tx and the above formula, the second target illuminance of the warm color temperature corresponding to the target color temperature Tx can be obtained when the cool color temperature C is fully bright.
[0063] Specifically, after obtaining the target color, the method further includes: obtaining the actual color temperature of the lamp when it emits light according to the target color temperature, and when there is a deviation between the actual color temperature and the target color temperature, correcting the deviation between the first target illuminance and the second target illuminance.
[0064] The storage device in the lamp stores the channel values corresponding to the warm and cool color temperatures in the target color temperature Tx. The lamp emits light according to the target color temperature Tx, and then collects the actual color temperature value under this emitted light. When there is a deviation between the actual color temperature and the target color temperature, the first target illuminance and the second target illuminance are corrected for the deviation. Finally, the correct color temperature channel value of the target color temperature is stored in the lamp for light emission, and the correct target color is obtained.
[0065] As can be seen from the above, the present invention provides a method for mixing warm and cool color temperatures. This method compares the target color temperature of the target color with the first color temperature when the warm color temperature is fully lit, the second color temperature when the cool color temperature is fully lit, and the critical color temperature when both the warm and cool color temperatures are fully lit. Based on the color temperature range of the target color temperature, the illuminance value of the other color temperature is adjusted while one of the warm and cool color temperatures is fully lit, thus obtaining the desired target color. This method can achieve the mixing of target color temperatures simply and quickly, improving the efficiency of color temperature mixing.
[0066] Example 2
[0067] Please refer to Figure 2 This is a schematic diagram of a device for mixing warm and cool color temperatures according to an embodiment of the present invention. The device includes: a color temperature and illuminance acquisition module, a critical color temperature acquisition module, a target color temperature comparison module, and a target color generation module.
[0068] The color temperature and illuminance acquisition module is used to acquire the first color temperature and first illuminance when the warm color temperature of the lamp is fully lit, and the second color temperature and second illuminance when the cool color temperature is fully lit, and transmit the acquired first color temperature, first illuminance, second color temperature and second illuminance to the target color temperature comparison module.
[0069] The critical color temperature acquisition module is used to acquire the critical color temperature when the warm color temperature and cool color temperature of the lamp are simultaneously fully lit, and transmit the acquired critical color temperature to the target color temperature comparison module.
[0070] The target color temperature comparison module is used to obtain the target color temperature of the target color of the lamp, compare the target color temperature with the first color temperature, the second color temperature and the critical color temperature respectively, and transmit the comparison result to the target color generation module.
[0071] The target color generation module is used to calculate, based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance, a first target illuminance for the warm color temperature corresponding to the target color temperature when the target color temperature is greater than a first color temperature and less than a critical color temperature, and a first target illuminance for the cool color temperature corresponding to the target color temperature when the target color temperature is the first illuminance; and to control the luminaire to emit light based on the first illuminance and the first target illuminance to obtain the target color. When the target color temperature is greater than a critical color temperature and less than a second color temperature, the module calculates, based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance, a second target illuminance for the warm color temperature corresponding to the target color temperature when the target color temperature is the second illuminance; and to control the luminaire to emit light based on the second illuminance and the second target illuminance to obtain the target color.
[0072] Example 3
[0073] Please refer to Figure 3 This is a schematic diagram of a warm and cool color temperature mixing system provided in an embodiment of the present invention. The system includes: a lamp, an external detection device for the lamp, and the warm and cool color temperature mixing device described in the above embodiment.
[0074] The lamp is used to emit light according to the target color temperature;
[0075] The external detection device for the lamp is used to collect the first color temperature and first illuminance when the warm color temperature of the lamp is fully lit, the second color temperature and second illuminance when the cool color temperature of the lamp is fully lit, the critical color temperature when both the warm and cool color temperatures are fully lit, and the actual color temperature when emitting light according to the target color temperature. The device then transmits the first color temperature, first illuminance, second color temperature, second illuminance, critical color temperature, and actual color temperature to the mixing device for the warm and cool color temperatures.
[0076] In summary, the present invention provides a device and system for mixing warm and cool color temperatures, which solves the technical problems of complex and inefficient mixing processes of warm and cool color temperatures in the prior art. It can achieve the mixing of target color temperatures simply and quickly, thereby improving the efficiency of color temperature mixing.
[0077] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.
Claims
1. A method of mixing warm and cool color temperatures, characterized in that, Includes the following steps: Obtain the first color temperature and first illuminance of the lamp when the warm color temperature is fully lit, and the second color temperature and second illuminance when the cool color temperature is fully lit; Obtain the critical color temperature when both the warm and cool color temperatures of the luminaire are fully illuminated simultaneously; Obtain the target color temperature of the target color of the lamp, and compare the target color temperature with the first color temperature, the second color temperature and the critical color temperature respectively; When the target color temperature is greater than the first color temperature and less than the critical color temperature, the first target illuminance of the warm color temperature corresponding to the target color temperature is calculated based on the first color temperature, the critical color temperature, the target color temperature, and the second illuminance. The warm color temperature of the lamp is controlled to be the first illuminance, and the illuminance of the cool color temperature is gradually adjusted from zero to the first target illuminance to obtain the target color. When the target color temperature is greater than the critical color temperature and less than the second color temperature, the second target illuminance of the cool color temperature corresponding to the target color temperature is calculated based on the second color temperature, the critical color temperature, the target color temperature, and the first illuminance. The cool color temperature of the lamp is controlled to be the second illuminance, and the illuminance of the warm color temperature is gradually adjusted from the first illuminance to the second target illuminance to obtain the target color. Calculate the first target illuminance E1 of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance using the following formula: E1= ； wherein Tw is the first color temperature, Tcw is the critical color temperature, Tx is the target color temperature, is the second illuminance; Calculate the second target illuminance E2 of the warm color temperature corresponding to the target color temperature when the second illuminance is the same for the cool color temperature corresponding to the target color temperature: wherein Tc is the second color temperature, is the first illuminance.
2. The method of mixing warm and cool color temperatures of claim 1, wherein, After obtaining the target color, the process also includes: The actual color temperature of the lamp when it emits light according to the target color temperature is obtained. When there is a deviation between the actual color temperature and the target color temperature, the first target illuminance and the second target illuminance are corrected for the deviation.
3. A device for mixing warm and cool color temperatures, characterized in that include: The module includes a color temperature and illuminance acquisition module, a critical color temperature acquisition module, a target color temperature comparison module, and a target color generation module. The color temperature and illuminance acquisition module is used to acquire the first color temperature and first illuminance when the warm color temperature of the lamp is fully lit, and the second color temperature and second illuminance when the cool color temperature is fully lit, and transmit the acquired first color temperature, first illuminance, second color temperature and second illuminance to the target color temperature comparison module. The critical color temperature acquisition module is used to acquire the critical color temperature when the warm color temperature and cool color temperature of the lamp are simultaneously fully lit, and transmit the acquired critical color temperature to the target color temperature comparison module. The target color temperature comparison module is used to obtain the target color temperature of the target color of the lamp, compare the target color temperature with the first color temperature, the second color temperature and the critical color temperature respectively, and transmit the comparison result to the target color generation module. The target color generation module is used to: when the target color temperature is greater than a first color temperature and less than a critical color temperature, calculate the first target illuminance of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance, based on the first color temperature, critical color temperature, target color temperature, and second illuminance; control the warm color temperature of the lamp to be the first illuminance, and gradually adjust the illuminance of the cool color temperature from zero to the first target illuminance to obtain the target color; when the target color temperature is greater than a critical color temperature and less than a second color temperature, calculate the second target illuminance of the warm color temperature corresponding to the target color temperature when the cool color temperature corresponding to the target color temperature is the second illuminance, based on the second color temperature, critical color temperature, target color temperature, and first illuminance; control the cool color temperature of the lamp to be the second illuminance, and gradually adjust the illuminance of the warm color temperature from the first illuminance to the second target illuminance to obtain the target color; Calculate the first target illuminance E1 of the cool color temperature corresponding to the target color temperature when the warm color temperature corresponding to the target color temperature is the first illuminance using the following formula: E1= wherein Tw is the first color temperature, Tcw is the critical color temperature, Tx is the target color temperature, is the second illuminance; Calculate the second target illuminance E2 of the warm color temperature corresponding to the target color temperature when the second illuminance is the same for the cool color temperature corresponding to the target color temperature: wherein Tc is the second color temperature, is the first illuminance.
4. A system for mixing warm and cool color temperatures, characterized in that include: The lamp, the lamp external detection device, and the mixing device for warm and cool color temperatures as described in claim 3; The lamp is used to emit light according to the target color temperature; The external detection device for the lamp is used to collect the first color temperature and first illuminance when the warm color temperature of the lamp is fully lit, the second color temperature and second illuminance when the cool color temperature of the lamp is fully lit, the critical color temperature when both the warm and cool color temperatures are fully lit, and the actual color temperature when emitting light according to the target color temperature. The device then transmits the first color temperature, first illuminance, second color temperature, second illuminance, critical color temperature, and actual color temperature to the mixing device for the warm and cool color temperatures.