CN110602818B

CN110602818B - Light smooth output system and controller

Info

Publication number: CN110602818B
Application number: CN201910735924.9A
Authority: CN
Inventors: 陈浩铭; 林义雄
Original assignee: Leedarson Lighting Co Ltd
Current assignee: Leedarson Lighting Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2022-01-07
Anticipated expiration: 2039-08-09
Also published as: CN110602818A; EP3772872A1; EP3772872B1

Abstract

The invention provides a light smooth output system, which comprises an LED light source, a light sensor and a controller. The controller is connected or coupled to the LED light source and the light sensor to receive the sensing signal of the light sensor and control the output power of the LED light source. The controller includes at least one input terminal and at least one output terminal. The input terminal is connected or coupled to the optical sensor, and the optical sensor receives the sensing signal. The output terminal is connected or coupled to the LED light source, and the output signal of the output terminal is modulated according to the sensing signal received by the light sensor of the controller as the control variable.

Description

Light smooth output system and controller

Technical Field

The present invention relates to a smooth light output system and a controller, and more particularly, to a smooth light output system and a controller for controlling an LED lamp.

Background

The phenomenon of change in the sensitivity of the human eye to light is called photopic adaptation. When a person suddenly enters a dark place in a bright environment for a long time, the person cannot see anything initially, and after a certain time, the visual sensitivity gradually increases, and the person can gradually see an object in the dark place, which is called dark adaptation (dark adaptation). In contrast, when a person suddenly enters a bright place in a dark place for a long time, the person initially feels a bright light, cannot see an object clearly, and can restore vision only for a while, which is called light adaptation (light adaptation).

Dark adaptation involves two basic processes: changes in pupil size and changes in retinal photosensitizing chemicals. In the process from light to dark, the diameter of the pupil can be enlarged from 2 mm to 8 mm, so that the light entering the eyeball is increased by 10-20 times. The process of adaptation is fast, usually in a few tens of seconds. From dark to bright, under the stimulation of strong light, cone cells in the retina are immediately put into work, the cone cells which work at the beginning are few, and the sensitivity of eyes to the light stimulation is very high, so that the eyes feel dazzled by light, and the surrounding scenery cannot be seen clearly. The intensity of the light emitted by the LED lamp per unit area is particularly bright, the light source can reach the highest brightness instantly when the LED lamp is started, and the light source is easy to suddenly make pupils have no time to react when the light is changed suddenly, so that the retina is permanently damaged by the instant light.

Disclosure of Invention

The present invention provides a light smoothing output system, which includes an LED light source, a light sensor, and a controller. The controller is connected or coupled to the LED light source and the light sensor to receive the sensing signal of the light sensor and control the output power of the LED light source. The controller includes at least one input terminal and at least one output terminal. The input terminal is connected or coupled to the optical sensor, and the optical sensor receives the sensing signal. The output terminal is connected or coupled to the LED light source, and the output signal of the output terminal is modulated according to the sensing signal received by the light sensor of the controller as the control variable.

Another objective of the present invention is to provide a controller, which is used in conjunction with an LED light source to control the output power of the LED light source. The controller includes at least one input terminal and at least one output terminal. The input end is used for receiving a sensing signal. The output terminal is connected or coupled to the LED light source, and the output signal of the output terminal is modulated according to the sensing signal received by the controller as the control variable.

Therefore, the present invention has the following advantages over the prior art:

1. the invention can smooth the output of the LED light source, avoid the damage of the eyes of a user by the high-intensity light source at the moment of turning on the lamp and increase the comfort level of the eyes of the user.

2. The present invention utilizes the ambient light source as a reference and uses the status of the ambient light source as a feedback to adjust the output of the LED light source, thereby increasing the comfort of the eyes of the user.

Drawings

FIG. 1 is a schematic diagram of a light smoothing output system according to the present invention.

Fig. 2 is an exemplary table of the Rounding function.

100 light smoothing output system; 10 LED light sources; 20 a light sensor; 30 a controller; 31 an analog-to-digital converter; 32 an adaptive light adjustment module; an A1 input terminal; an A2 output terminal; 40 electromagnetic relay

Detailed Description

The detailed description and technical contents of the present invention will be described below with reference to the accompanying drawings. Furthermore, for convenience of illustration, the drawings are not necessarily drawn to scale, and they are not intended to limit the scope of the invention.

Referring now to FIG. 1, a preferred embodiment of the present invention is illustrated, in which:

the light smoothing output system 100 of the present invention mainly includes an LED light source 10, a light sensor 20, and a controller 30 connected to the LED light source 10 and the light sensor 20.

The LED light source 10 may be an array of one or more LED units, and the output power of the LED light source 10 is switched according to the instruction of the controller. In a practical embodiment, the LED light source 10 may be an indoor lighting lamp such as an LED ceiling lamp, an LED down lamp, an LED bulb, an LED ceiling lamp, an LED tube, an LED panel lamp, or the like, or may be an outdoor lighting lamp such as an LED projection lamp, an LED street lamp, or the like, and the application embodiments are not intended to limit the scope of the present invention.

The light sensor 20 is used for detecting the ambient light source, and converting the brightness of the ambient light source into a sensing signal to be transmitted to the controller 30. The light sensor 20 may be, for example, an image sensor (CMOS), a bolometer, a photo-coupled device (CCD), a photodiode, a photo-resistor, a photo-transistor, etc., and is not limited in the present invention.

The controller 30 is connected or coupled to the LED light source 10 and the light sensor 20 to receive the sensing signal of the light sensor 20 and control the output power of the LED light source 10 according to the sensing signal. The controller 30 may be, for example, a general-purpose or special-purpose Microprocessor (Microprocessor) programmable by a central processing unit (cpu), a Digital Signal Processor (DSP), a programmable controller, an Application Specific Integrated Circuit (ASIC), a single chip RF system (RF-SoC), or other similar devices or combinations thereof, which are not limited in the present invention. The controller 30 may be configured with a storage unit, which may be utilized to store, for example, parameters, Look-up tables (Look-up tables), or fault records. The storage unit may be, for example, an Electrically-Erasable Programmable Read-Only Memory (EEPROM), which is not limited in the present invention.

In one embodiment, the controller 30 mainly includes an analog-to-digital converter 31 and an adaptive optical adjusting module 32. The analog-to-digital converter 31 is connected to at least one input terminal a1, the input terminal a1 is connected or coupled to the light sensor 20, and the analog-to-digital converter 31 receives the sensing signal from the light sensor 20 and converts the sensing signal from an analog form to a digital form. The adaptive light adjusting module 32 is connected to at least one output terminal A2, the output terminal A2 is connected or coupled to the LED light source 10, and the output signal of the output terminal A2 is adjusted accordingly according to the sensing signal received by the controller 30 from the light sensor 20 as a control variable. In one embodiment, one or more electromagnetic relays 40 are disposed between the controller 30 and the LED light source 10, and the controller 30 determines the operating power input to the LED light source 10 by controlling the electromagnetic relays 40.

The following description is directed to a specific calculation method of the adaptive optical adjusting module 32 according to the present invention, and a preferred embodiment is shown: after the controller 30 receives the start signal from any input port (or communicator), the adaptive light adjusting module 32 of the controller 30 modulates the output time-varying signal according to the following formula:

Y[n]＝f{X[n]×α+(1-α)×Y[n-1]}；

wherein X [ n ] is the sensing signal at the nth stage, Y [ n ] is the time-varying signal outputted at the nth stage, Y [ n-1] is the time-varying signal outputted at the nth-1 stage, α is the smoothing parameter between [0,1], and f { } is the Rounding function.

The received sensing signal can be rounded to a specified length or significance using a Rounding function, such as a Floor function, a Ceil function, a Round function, an Int function, or an Int + sign function, to provide a value of significant output. Referring also to FIG. 2, an exemplary table of the routing function is shown:

wherein the functions are defined as follows:

floor function: the function value (f (x)) is returned to a parameter value not greater than the variable value (x) to the specified number of bits.

The Ceil function: the function value (f (x)) is returned to a parameter value of not less than the variable value (x) to a specified number of bits.

Round function: the function value (f (x)) is the value of the variable (x) rounded to the specified number of digits.

Int function: if the variable value (x) is greater than or less than 0, the function value (f (x)) is unconditionally dropped to a specified number of parameter values; if the variable value (x) is equal to 0, the function value (f (x)) is equal to 0.

Int + sign function: if the variable value (x) is greater than or less than 0, the function value (f (x)) is unconditionally carried to the parameter value of the designated digit; if the variable value (x) is equal to 0, the function value (f (x)) is equal to 0.

As shown in the table, when the number of the specified bits is an integer, the function value obtained by the Floor function is { -4, -3, -2,1,2,3} when the parameter values of the sensing signal are { -3.5, -2.9, -1.1, 2.9, 3.5} respectively; the function values obtained via the Ceil function are { -3, -2, -1,2,3,4 }; the function value obtained via the Round function is { -4, -3, -1,1,3,4 }; the function value obtained via the Int function is { -3, -2, -1,1,2,3 }; the function values obtained via the Int + sign function are { -4, -3, -2,2,3,4 }. In the embodiment, the number of the designated bits is an integer, but may be adjusted to other designated numbers according to the requirement of the actual or hardware, and is not limited in the present invention.

Therefore, the adaptive light adjusting module 32 can adjust and correct the output signal of the output end through the detected ambient light source, so as to adjust the ambient light source to the corresponding output brightness in a gradual change manner under the condition that human eyes cannot feel the step-like change in the adaptability of the ambient light source.

In conclusion, the invention can smooth the output of the LED light source, avoid the damage of the eyes of the user by the high-intensity light source at the moment of turning on the lamp and increase the comfort level of the eyes of the user. In addition, the present invention uses the ambient light source as a reference to match the status of the ambient light source as a feedback to adjust the output of the LED light source, thereby increasing the comfort of the eyes of the user.

Although the present invention has been described in detail, it should be understood that the above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, i.e., the appended claims are intended to cover all such modifications and changes as fall within the true spirit and scope of the invention.

Claims

1. A light smoothing output system, comprising:

an LED light source;

a light sensor; and

a controller connected to the LED light source and the light sensor for receiving the sensing signal of the light sensor and controlling the output power of the LED light source, the controller comprising:

at least one input end connected to the optical sensor for receiving the sensing signal; and

at least one output end connected to the LED light source, the output signal of the output end being modulated with the sensing signal received by the light sensor as a control variable according to the controller;

wherein the output terminal of the controller outputs the time-varying signal from the received sensing signal according to the following equation:

Y[n]＝f{X[n]×α+(1-α)×Y[n-1]}；

wherein X [ n ] is the sensing signal at the nth stage, Y [ n ] is the time varying signal output at the nth stage, Y [ n-1] is the time varying signal output at the nth-1 stage, α is a smoothing parameter between [0,1], and f { } is a Rounding function that rounds the received sensing signal to a specified length or significance, providing a value that is effectively output.

2. The system of claim 1, wherein the Rounding function is a ceil function, floor function, int + sign function, or round function; the int + sign function is defined as follows: if the variable value (x) is greater than or less than 0, the function value f (x) is unconditionally carried to the parameter value of the designated digit; if the variable value (x) is equal to 0, the function value f (x) is equal to 0.

3. The system of claim 1, wherein the controller comprises an analog-to-digital converter connected to the input for converting the analog signal of the light sensor into a digital signal.

4. The system of claim 1, wherein one or more electromagnetic relays are disposed between the controller and the LED light source.

5. A controller for controlling the output power of an LED light source in cooperation with the LED light source, the controller comprising:

at least one input end for receiving a sensing signal; and

at least one output terminal connected to the LED light source, the output signal of the output terminal being modulated according to the sensing signal received by the controller as a control variable;

Y[n]＝f{X[n]×α+(1-α)×Y[n-1]}；

6. The controller of claim 5, wherein the Rounding function is a ceil function, floor function, int + sign function, or round function; the int + sign function is defined as follows: if the variable value (x) is greater than or less than 0, the function value f (x) is unconditionally carried to the parameter value of the designated digit; if the variable value (x) is equal to 0, the function value f (x) is equal to 0.

7. The controller of claim 5, wherein the controller includes an analog-to-digital converter coupled to the input for converting an analog signal to a digital signal.