Method and apparatus for automatically controlling illumination based on illuminance contribution

• US 10,485,076 B2
• Filed: 11/13/2018
• Issued: 11/19/2019
• Est. Priority Date: 04/05/2018
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Dae Ho
• Primary Examiner(s): Richardson, Jany
• Application Number:
  US16/188,849
• Publication Number:
  US 20190313507A1
• Time in Patent Office: 371 Days
• Field of Search: None
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources
• CPC Class Codes: H05B 47/18 via data-bus transmission
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

An illumination control method includes calculating illuminances of a plurality of lighting apparatuses for at least one flat target surface on the basis of information regarding the lighting apparatuses stored in a database and flat target surface information received from a user, calculating an illuminance contribution of each of the lighting apparatuses for the at least one flat target surface on the basis of the illuminances of the plurality of lighting apparatuses for the at least one flat target surface, and calculating a luminance value of each of the lighting apparatuses on the basis of a target illuminance received from the user and the illuminance contribution of the lighting apparatus and controlling a luminance of each of the lighting apparatuses for luminance of the plurality of lighting apparatuses.

Claims

1. An illumination control method of an automatic illumination control apparatus including an illuminance calculator, a contribution calculator, and a luminance calculator, the illumination control method comprising:

calculating, by the illuminance calculator, illuminances of a plurality of lighting apparatuses on at least one flat target surface on the basis of information regarding the lighting apparatuses stored in a database and flat target surface information received from a user;

calculating, by the contribution calculator, an illuminance contribution of each of the lighting apparatuses on the at least one flat target surface on the basis of the illuminances of the lighting apparatuses on the at least one flat target surface; and

calculating, by the luminance calculator, a luminance value of each of the lighting apparatuses on the basis of a target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses to thereby control a luminance of each of the lighting apparatuses for luminance of the lighting apparatuses.

2. The illumination control method of claim 1, wherein the calculating of the illuminances of the plurality of lighting apparatuses on the at least one flat target surface includes:

calculating an angle of each of the lighting apparatuses toward the at least one flat target surface with respect to a vertical line to the at least one flat target surface on the basis of the information regarding the lighting apparatuses and the flat target surface information;

calculating a luminous intensity of each of the lighting apparatuses on the basis of the information regarding the lighting apparatuses and the angles with respect to the vertical line; and

calculating the illuminance of each of the lighting apparatuses on the basis of the flat target surface information and the luminous intensity.

3. The illumination control method of claim 2, wherein the calculating of the luminous intensity of each of the lighting apparatuses on the basis of the information regarding the lighting apparatuses and the angles with respect to the vertical line includes:

calculating an effective luminous flux of each of the lighting apparatuses on the basis of the information regarding the lighting apparatuses;

calculating a photometry value of each of the lighting apparatuses on the basis of the information regarding the lighting apparatuses and the angles with respect to the vertical line; and

calculating the luminous intensity of each of the lighting apparatuses on the basis of the effective luminous flux and the photometry value.

4. The illumination control method of claim 1, wherein the calculating of the illuminance contribution of each of the lighting apparatuses on the at least one flat target surface on the basis of the illuminances of the lighting apparatuses on the at least one flat target surface includes:

generating a target-illuminance matrix for the at least one flat target surface and the lighting apparatuses on the basis of the illuminances of the lighting apparatuses on the at least one flat target surface; and

calculating the illuminance contribution of each of the lighting apparatuses using the target-illuminance matrix.

5. The illumination control method of claim 1, wherein the calculating of the luminance value of each of the lighting apparatuses on the basis of the target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses to control the luminance of each of the lighting apparatuses for the luminance of the lighting apparatuses includes:

setting all of the luminance of the lighting apparatuses to maximum values; and

calculating a first luminance value in which the luminance of each of the lighting apparatuses is decreased for the luminance of the lighting apparatuses on the basis of the target illuminance, the luminance of the lighting apparatuses, and the illuminance contribution of each of the lighting apparatuses.

6. The illumination control method of claim 5, wherein the calculating of the first luminance value in which the luminance of each of the lighting apparatuses is decreased for the luminance of the lighting apparatuses includes:

a first step of calculating an illuminance of the at least one flat target surface according to the luminance of the lighting apparatuses;

a second step of selecting the lighting apparatus, of which a sum of the illuminance contributions for the at least one flat target surface is the lowest, among the lighting apparatuses;

a third step of selecting a flat target surface, at which the illuminance contribution of the selected lighting apparatus is the highest, among the at least one flat target surface;

a fourth step of calculating the first luminance value of the selected lighting apparatus on the basis of an illuminance of the selected flat target surface and the target illuminance; and

a fifth step of repeatedly performing the first step to the fourth step until all of the first luminance values of the lighting apparatuses are calculated.

7. The illumination control method of claim 5, wherein the calculating of the luminance value of each of the lighting apparatuses on the basis of the target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses to control the luminance of each of the lighting apparatuses for the luminance of the lighting apparatuses further includes:

calculating a second luminance value in which the luminance of each of the lighting apparatuses is increased for the luminance of the lighting apparatuses on the basis of the target illuminance, the luminance of the lighting apparatuses, and the illuminance contribution of each of the lighting apparatuses.

8. The illumination control method of claim 7, wherein the calculating of the second luminance value in which the luminance of each of the lighting apparatuses is increased for the luminance of the lighting apparatuses includes:

a sixth step of calculating a illuminance of h at least one flat target surface according to the luminance of the lighting apparatuses;

a seventh step of selecting the lighting apparatus, of which a sum of the illuminance contributions for the at least one flat target surface is the highest, among the lighting apparatuses;

an eighth step of selecting a flat target surface, at which the illuminance contribution of the selected lighting apparatus is the highest, among the at least one flat target surface;

a ninth step of calculating the second luminance value of the selected lighting apparatus on the basis of the illuminance of the selected flat target surface and the target illuminance; and

a tenth step of repeatedly performing the sixth step to the ninth step until all of the second luminance values of the lighting apparatuses are calculated.

9. The illumination control method of claim 7, wherein the calculating of the luminance value of each of the lighting apparatuses on the basis of the target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses to control the luminance of each of the lighting apparatuses for the luminance of the lighting apparatuses further includes;

calculating a third luminance value in which the luminance of at least one of the lighting apparatuses is increased for each of the lighting apparatuses on the basis of the target illuminance, the luminance of the lighting apparatuses, and the illuminance contribution of each of the lighting apparatuses.

10. The illumination control method of claim 9, wherein the calculating of the third luminance value in which the luminance of the at least one of the lighting apparatuses is increased for each of the lighting apparatuses includes:

an eleventh step of calculating an illuminance of the at least one flat target surface according to the luminance of the lighting apparatuses;

a twelfth step of selecting a flat target surface, in which an illuminance is lower than the target illuminance and a difference between the illuminance and the target illuminance is the highest, among the at least one flat target surface;

a thirteenth step of selecting the lighting apparatus, of which the illuminance contribution for the selected flat target surface is the highest, among the lighting apparatuses;

a fourteenth step of calculating the third luminance value of the selected lighting apparatus on the basis of the illuminance of the selected flat target surface and the target illuminance; and

a fifteenth step of repeatedly performing the eleventh step to the fourteenth step until there is no flat target surface, of which an illuminance is less than the target illuminance, among the at least one flat target surface.

11. An illumination control method of any one of automatic illumination control apparatuses each including a lighting apparatus, an illuminance calculator, an illumination information transceiver, a contribution calculator, a luminance calculator, and a luminance controller, the illumination control method comprising:

calculating, by the illuminance calculator, an illuminance of the lighting apparatus on at least one flat target surface on the basis of information regarding the lighting apparatus stored in a database and flat target surface information received from a user;

transmitting, by the illumination information transceiver, information regarding the calculated illuminance of the lighting apparatus to at least another one of the illumination control apparatuses, and receiving, by the illumination information transceiver, information regarding an illuminance of the at least other lighting apparatus from the at least other illumination control apparatus;

calculating, by the contribution calculator, an illuminance contribution of each of the lighting apparatuses on the at least one flat target surface on the basis of information regarding the illuminance of the lighting apparatus and the illuminance of the at least other lighting apparatus for on the at least one flat target surface; and

calculating, by the luminance calculator, a luminance value of the lighting apparatus on the basis of a target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses, and controlling, by the luminance controller, a luminance of the lighting apparatus.

12. The illumination control method of claim 11, wherein the calculating of the illuminance of the lighting apparatus on the at least one flat target surface includes:

calculating an angle of the lighting apparatus toward the at least one flat target surface with respect to a vertical line to the at least one flat target surface on the basis of the information regarding the lighting apparatus and the flat target surface information;

calculating a luminous intensity of the lighting apparatus on the basis of the information regarding the lighting apparatus and the angle with respect to the vertical line; and

calculating the illuminance of the lighting apparatus on the basis of the flat target surface information and the luminous intensity.

13. The illumination control method of claim 11, wherein the calculating of the illuminance contribution of each of the lighting apparatuses on the at least one flat target surface includes:

generating a target-illuminance matrix for the at least one flat target surface, the lighting apparatus, and the at least other lighting apparatus on the basis of information regarding the illuminance of the lighting apparatus and the illuminance of the at least other lighting apparatus on the at least one flat target surface; and

calculating the illuminance contribution of each of the lighting apparatuses using the target-illuminance matrix.

14. The illumination control method of claim 11, wherein the calculating of the luminance value of the lighting apparatus on the basis of the target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses and the controlling of the luminance of the lighting apparatus includes:

setting all of the luminance of the lighting apparatus and the at least other lighting apparatus to maximum values;

calculating a first luminance value in which the luminance of each of the lighting apparatuses is decreased for the luminance of the lighting apparatus and the at least other lighting apparatus on the basis of the target illuminance, the luminance of the lighting apparatus, the luminance of the at least other lighting apparatus, and the illuminance contribution of each of the lighting apparatuses;

calculating a second luminance value in which the luminance of each of the lighting apparatuses is increased for the luminance of the lighting apparatus and the at least other lighting apparatus on the basis of the target illuminance, the luminance of the lighting apparatus, the luminance of the at least other lighting apparatus, and the illuminance contribution of each of the lighting apparatuses; and

calculating a third luminance value in which the luminance of each of the lighting apparatuses is increased for the luminance of at least one lighting apparatus of the lighting apparatus and the at least other lighting apparatus on the basis of the target illuminance, the luminance of the lighting apparatus, the luminance of the at least other lighting apparatus, and the illuminance contribution of each of the lighting apparatuses.

15. An automatic illumination control apparatus comprising:

a processor, and

a memory configured to store units comprising commands executed by the processor,

wherein the units comprise;

an illuminance calculator which calculates illuminances of a plurality of lighting apparatuses on at least one flat target surface on the basis of information regarding the lighting apparatuses stored in a database and flat target surface information received from a user;

a contribution calculator which calculates an illuminance contribution of each of the lighting apparatuses on the at least one flat target surface on the basis of the illuminances of the lighting apparatuses on the at least one flat target surface; and

a luminance calculator which calculates a luminance value of each of the lighting apparatuses on the basis of a target illuminance received from the user and the illuminance contribution of each of the lighting apparatuses to control a luminance of each of the lighting apparatuses for luminance of the lighting apparatuses.

16. The illumination control apparatus of claim 15, wherein the illuminance calculator:

calculates angles of the lighting apparatuses toward the at least one flat target surface with respect to a vertical line to the at least one flat target surface on the basis of the information regarding the lighting apparatuses and the flat target surface information;

calculates a luminous intensity of each of the lighting apparatuses on the basis of the information regarding the lighting apparatuses and the angles with respect to the vertical line; and

calculates the illuminance of each of the lighting apparatuses on the basis of the flat target surface information and the luminous intensity.

17. The illumination control apparatus of claim 15, wherein the luminance calculator:

sets all of the luminance of the lighting apparatuses to maximum values;

calculates a first luminance value in which the luminance of each of the lighting apparatuses is decreased for the luminance of the lighting apparatuses on the basis of the target illuminance, the luminance of the lighting apparatuses, and the illuminance contribution of each of the lighting apparatuses;

calculates a second luminance value in which the luminance of each of the lighting apparatuses is increased for the luminance of the lighting apparatuses on the basis of the target illuminance, the luminance of the lighting apparatuses, and the illuminance contribution of each of the lighting apparatuses; and

calculates a third luminance value in which the luminance of at least one of the lighting apparatuses is increased for the each of the lighting apparatuses on the basis of the target illuminance, the luminance of the lighting apparatuses, and the illuminance contribution of each of the lighting apparatuses.