TWI426820B - Illumination device capable of adjusting brightness and adjusting method thereof - Google Patents

Description

Illuminating device capable of adjusting luminous brightness and adjusting method

The invention relates to an illumination device and an adjustment method for adjusting the illumination brightness of a light-emitting component.

The existing brightness-adjustable illumination device can sense the brightness of the surrounding environment through the photosensitive component, so that the illumination device adjusts the brightness of the illumination component according to the brightness of the surrounding environment to adapt to the user's use, thereby achieving the effect of protecting the eyes and saving energy.

However, in the existing illumination device with adjustable brightness, in order to avoid the influence of the brightness of the illumination component, the brightness of the surrounding environment is sensed, and the photosensitive component must be disposed in a place where the light of the illumination component is not illuminated, so the existing The position of the photosensitive member of the illumination device that adjusts the brightness is limited.

At the same time, the illuminating component changes the illuminating brightness as the ambient brightness sensed by the photographic component changes, which is easily affected by an emergency event, and the sudden change of the illuminating brightness not only consumes electricity, but also affects the user's use.

In view of the above, it is necessary to provide a method for adjusting the luminance of a light-emitting component according to ambient light brightness and a lighting device using the same, to solve the problem that the existing lighting device cannot accurately sense the brightness of the ambient light and thus cannot accurately adjust the light-emitting brightness of the light-emitting component. Technical issues.

A lighting device for adjusting brightness of a light, comprising a photosensitive component, a control module, a lighting component and a power module, the photosensitive component is configured to sense and calculate a brightness value of the ambient light, the lighting component is used to provide illumination, and the power module is The illuminating device provides the required amount of power, and further includes a control switch for turning on and off the electrical connection of the illuminating component to the power module to illuminate and extinguish the illuminating component. During a period in which the control switch disconnects the light-emitting component from the power module, the control switch triggers the photosensitive component to sense and calculate the brightness value of the ambient light, and the control module adjusts the light-emitting brightness of the light-emitting component according to the brightness value of the ambient light.

Further, the lighting device further includes a calculation module, configured to calculate an average brightness value of the ambient light in the preset time period, and the control module adjusts the light emission brightness of the light emitting component according to the average brightness value of the ambient light.

A method for adjusting the brightness of a light-emitting component includes: electrically connecting an illumination component to a power source to illuminate the illumination component, and calculating a duration of the on-time; and disconnecting the illumination component when the duration of the on-time reaches a first time Electrical connection with the power source, thereby extinguishing the light-emitting component, calculating the duration of the disconnection, sensing and calculating the brightness value of the ambient light; adjusting the brightness of the light-emitting component according to the brightness value of the ambient light; when the duration of the disconnection is reached At the second time, the electrical connection of the lighting assembly to the power source is turned on to illuminate the lighting assembly again, and thus circulates.

Compared with the prior art, the present invention controls the light-emitting component to be connected and disconnected from the power source by setting a control switch, and the photosensitive component senses the brightness of the ambient light during the time when the light-emitting component is turned off, thereby avoiding the influence of the light emitted by the light-emitting component, so that the photosensitive component The sensed brightness value of the ambient light is more accurate, thereby more accurately adjusting the brightness of the illumination component.

Further, the illumination device further comprises a calculation module, which calculates an average brightness value of the ambient light in the preset time period, and adjusts the light emission brightness of the light-emitting component according to the average brightness value of the ambient light. In this way, the illumination device can average the multiple sensed ambient brightness values over a period of time, rather than adjusting the brightness of the illumination components according to the sensed ambient brightness values at a certain time, thereby avoiding unexpected events. influences.

Referring to FIG. 1 , the illumination device 100 includes a photosensitive component 11 , a control module 12 , a light emitting component 13 , and a power module 14 . The illuminating device 100 can be a lighting product such as a desk lamp or a backlight module of an electronic device. The photosensitive member 11 is for sensing the brightness of ambient light and calculating the brightness value of the ambient light, for example, the photosensitive member 11 includes a light sensitive detector for sensing the brightness of the ambient light. The light-emitting component 13 is used to provide illumination, such as a light-emitting diode (LED) or the like. The power module 14 provides the required power to the lighting device 100.

The lighting device 100 further includes a memory 15, a timing module 16, and a control switch 17. The control switch 17 is used to turn on and off the electrical connection of the light-emitting assembly 13 to the power module 14, thereby illuminating and extinguishing the light-emitting assembly 13. During a period in which the control switch 17 disconnects the light-emitting component 13 from the power module 14 , the control switch 17 triggers the photosensitive component 11 to sense the brightness of the ambient light, and calculates the brightness value of the ambient light, and the control module 12 according to the ambient light. The luminance value adjusts the luminance of the light-emitting component 13. The photosensitive component 11 senses the brightness of the ambient light during the period in which the light-emitting component 13 is extinguished, and prevents the light-emitting component 13 from emitting light, so that the brightness value of the ambient light sensed by the photosensitive component 11 is more accurate, thereby more accurately adjusting the light emission. The luminance of the illumination of the component 13.

Since the persistence time of the human eye is generally 0.1-0.4 s, the time period for disconnecting the light-emitting component 13 from the power module 14 is set to be less than 0.1 s so that the human eye does not perceive the extinguishing action of the light-emitting component 13 . Therefore, it will not affect the normal use of the user.

In the present embodiment, the memory 15 stores the first time and the second time in advance. The first time is set to a duration in which the light-emitting component 13 is lit, for example, set to 5 s, that is, a time interval during which the photosensitive component 11 senses the brightness of the ambient light, and the photosensitive component is affected by an unexpected event with a short duration The adjacent values of the brightness values of the sensed ambient light are greatly different, and the accuracy of adjusting the brightness of the light-emitting unit 13 is affected. Therefore, the time interval for setting the brightness of the ambient light by the photosensitive member 11 should not be too long. The second time is set to a duration in which the light-emitting component 13 is turned off, for example, set to 15 ms, that is, the second time is less than the human eye visual persistence time, so that the human eye does not perceive the extinguishing action of the light-emitting component 13 and does not affect the normality of the user. use.

The timing module 16 is used to calculate the time at which the control switch 17 is turned "on" and "off". When the control switch 17 turns on the electrical connection between the light-emitting component 13 and the power module 14 to illuminate the light-emitting component 13, the control switch 17 triggers the timing module 16 to start timing, and when the timing reaches the first time, the timing module 16 triggers control. The switch 17 disconnects the electrical connection of the light-emitting assembly 13 from the power module 14, thereby extinguishing the light-emitting assembly 13.

When the control switch 17 disconnects the electrical connection between the light-emitting component 13 and the power module 14, the control switch 17 triggers the timing module 16 to start timing. When the timing reaches the second time, the timing module 16 triggers the control switch 17 to turn on the light-emitting component. 13 is electrically connected to the power module 14 to illuminate the light-emitting assembly 13. Before timing is started, the timing module 16 is first set to zero, then starts timing, and thus loops.

In order to avoid the adjustment error caused by the sudden change of the ambient light, the illumination device 100 further includes a calculation module 18 for calculating an average brightness value of the ambient light in the preset time period, and the control module 12 is based on the average of the ambient light. The luminance value adjusts the luminance of the light-emitting component 13.

Referring to FIG. 2, a method for adjusting the brightness of the light-emitting component 13 by the illumination device 100 includes the following steps:

In step S20, the electrical connection of the light-emitting component 13 to the power source is turned on to illuminate the light-emitting component 13, and the duration of the turn-on is calculated.

Step S21, when the duration of the on-time reaches the first time, disconnect the electrical connection of the light-emitting component 13 with the power source, thereby extinguishing the light-emitting component 13, calculating the duration of the disconnection, sensing the brightness of the ambient light, and calculating the ambient light. Brightness value.

The first time is set to a duration in which the light-emitting component 13 is lit, for example, set to 5 s, that is, a time interval in which the photosensitive component 11 senses the brightness of the ambient light, which is affected by an emergency with a short duration. The adjacent values of the brightness values of the ambient light sensed by the photosensitive member 11 are greatly different, thereby affecting the accuracy of adjusting the brightness of the light-emitting unit 13 . Therefore, it is not appropriate to set the time interval at which the photosensitive member 11 senses the brightness of the ambient light. Too long.

Step S22, adjusting the light-emitting brightness of the light-emitting component 13 according to the brightness value of the ambient light.

In step S23, when the duration of the disconnection reaches the second time, the electrical connection of the light-emitting component 13 to the power source is turned on to illuminate the light-emitting component 13 again, thus looping. The second time is set to a duration in which the light-emitting component 13 is turned off, for example, set to 15 ms, that is, the second time is less than the human eye visual persistence time, so that the human eye does not perceive the extinguishing action of the light-emitting component 13 and does not affect the user. Normal use.

In order to avoid the adjustment error caused by the sudden change of the ambient light, the method further includes the steps of: calculating an average brightness value of the ambient light in the preset time period, and adjusting the light-emitting brightness of the light-emitting component 13 according to the average brightness value of the ambient light.

In other embodiments, the user may change the values of the preset time period, the first time, and the second time to suit different situations.

It is to be understood that those skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are intended to be included in the scope of the invention.

100‧‧‧Lighting device

11‧‧‧Photosensitive components

12‧‧‧Control Module

13‧‧‧Lighting components

14‧‧‧Power Module

15‧‧‧ memory

16‧‧‧Time Module

17‧‧‧Control switch

18‧‧‧Computation Module

1 is a functional block diagram of an illumination device capable of adjusting the brightness of a light-emitting component of the present invention.

2 is a flow chart of a method for adjusting the brightness of a light-emitting component of the lighting device shown in FIG. 1.

Claims (9)

A lighting device capable of adjusting brightness of light, comprising a photosensitive component, a control module, a light emitting component and a power module, wherein the photosensitive component is used for sensing brightness of ambient light and calculating brightness value of ambient light, and the light emitting component is used for providing illumination, The power module supplies power to the lighting device, and the improvement is:
The lighting device further includes a control switch for turning on and off an electrical connection between the light emitting component and the power module;
The control switch triggers the photosensitive component to sense the brightness of the ambient light and calculate the brightness value of the ambient light during a period in which the control switch disconnects the light assembly from the power module;
The control module adjusts the brightness of the light emitting component according to the brightness value of the ambient light. The illuminating device of claim 1, wherein the illuminating device further comprises:
Memory, storing the first time and the second time in advance;
a timing module that calculates the duration of the control switch being turned on and off;
When the timing of the timing module reaches the first time, the control switch disconnects the electrical connection between the lighting component and the power module; when the timing of the timing module reaches the second time, the control switch turns on the lighting component and the power module Electrical connection. The lighting device of claim 2, wherein the first time is set to 5s and the second time is set to 15ms. The lighting device of claim 2, wherein the timing module is first set to zero before starting timing, and then timing is started. The lighting device of claim 1, wherein the lighting device further comprises a computing module, configured to calculate an average brightness value of the ambient light in the preset time period, and the control module is based on the average of the ambient light. The brightness value adjusts the brightness of the illumination component. A method of adjusting brightness of a light-emitting component, the method comprising:
Turning on the electrical connection between the lighting component and the power source, and calculating the duration of the connection;
When the duration of the on time reaches the first time, the electrical connection between the light emitting component and the power source is disconnected, the duration of the disconnection is calculated, the brightness of the ambient light is sensed, and the brightness value of the ambient light is calculated;
Adjusting a brightness of the light emitting component according to the brightness value of the ambient light;
When the duration of the disconnection reaches the second time, the electrical connection of the lighting assembly to the power source is turned on. The method of claim 6, wherein the first time is a duration in which the lighting component is illuminated, and the second time is a duration in which the lighting component is extinguished. The method of claim 6, wherein the first time is set to 5s and the second time is set to 15ms. The method of claim 6, wherein the method further comprises the steps of: calculating an average brightness value of the ambient light in the preset time period, and adjusting the light-emitting brightness of the light-emitting component according to the average brightness value of the ambient light.