Brightness control method of illumination device, brightness control device and brightness control system

A brightness control device of an illumination device, the bright control device comprising:

• a memory configured to store computer program codes including computer program instructions;
• and
• one or more processors coupled to the memory, wherein at least one processor is configured to when executing the computer program instructions, perform:
• obtaining a brightness of ambient light;
• if the brightness of the ambient light is less than a target brightness, determining an amount of supplementary light according to the brightness of the ambient light and the target brightness;
• and
• generating a first pulse signal according to the amount of supplementary light to control the illumination device to emit light;
• wherein
• the at least one processor is further configured to perform:
• obtaining a driving signal according to the amount of supplementary light;
• obtaining a duty cycle of the first pulse signal according to the driving signal and a correspondence between the driving signal and the duty cycle of the first pulse signal;
• and
• generating the first pulse signal according to the duty cycle of the first pulse signal;
• wherein the at least one processor is further configured to perform:
• obtaining, according to a following formula, a power converted into light in an output power of the illumination device when the illumination device is driven to emit light with the amount of supplementary light:
• P
• ⁢
• O
• ⁢
• Y
• n
• =
• (
• P
• ⁢
• O
• ⁢
• Y
• 2
• -
• P
• ⁢
• O
• ⁢
• Y
• 1
• )
• (
• W
• 2
• -
• W
• 1
• )
• ·
• W
• n
• ;
• wherein POY2 is a power, converted into light with a maximum brightness, in an output power of the illumination device when the illumination device is driven to emit the light with the maximum brightness;
• POY1 is a power, converted into light with a minimum brightness in another output power of the illumination device when the illumination device is driven to emit the light with the minimum brightness;
• POYn a power, converted into light with the amount of supplementary light, in yet another output power of the illumination device when the illumination device is driven to emit the light with the amount of supplementary light;
• n represents the driving signal corresponding to the amount of supplementary light;
• W2 is the maximum brightness of the illumination device;
• W1 is the minimum brightness of the illumination device;
• and Wn is the amount of supplementary light;
• and
• obtaining the driving signal according to the power converted into the light with the amount of supplementary light, and a correspondence between the driving signal and the power converted into the light with the amount of supplementary light.

A brightness control system of an illumination device, the brightness control system comprising:

• an ambient light detection device configured to detect a brightness of ambient light;
• a control device coupled to the ambient light detection device and configured to:
• obtain the brightness of the ambient light from the ambient light detection device;
• if the brightness of the ambient light is less than a target brightness, determine an amount of supplementary light according to the brightness of the ambient light and the target brightness;
• and
• generate a first pulse signal according to the amount of supplementary light to control the illumination device to emit light;
• wherein
• the control device is configured to:
• obtain a driving signal according to the amount of supplementary light;
• obtain a duty cycle of the first pulse signal according to the driving signal and a correspondence between the driving signal and the duty cycle of the first pulse signal;
• and
• generates the first pulse signal according to the duty cycle of the first pulse signal;
• wherein the control device is further configured to:
• obtain, according to a following formula, a power converted into light in an output power of the illumination device when the illumination device is driven to emit light with the amount of supplementary light:
• P
• ⁢
• O
• ⁢
• Y
• n
• =
• (
• P
• ⁢
• O
• ⁢
• Y
• 2
• -
• P
• ⁢
• O
• ⁢
• Y
• 1
• )
• (
• W
• 2
• -
• W
• 1
• )
• ·
• W
• n
• ;
• wherein POY2 is a power, converted into light with a maximum brightness, in an output power of the illumination device when the illumination device is driven to emit the light with the maximum brightness;
• POY1 is a power, converted into light with a minimum brightness in another output power of the illumination device when the illumination device is driven to emit the light with the minimum brightness;
• POYn a power, converted into light with the amount of supplementary light, in yet another output power of the illumination device when the illumination device is driven to emit the light with the amount of supplementary light;
• n represents the driving signal corresponding to the amount of supplementary light;
• W2 is the maximum brightness of the illumination device;
• W1 is the minimum brightness of the illumination device;
• and Wn is the amount of supplementary light;
• and
• obtain the driving signal according to the power converted into the light with the amount of supplementary light, and a correspondence between the driving signal and the power converted into the light with the amount of supplementary light.