TW201325308A - Illumination control system and illumination control method - Google Patents

Abstract

An illumination control method and an illumination control system applying the same which are suitable for an illumination apparatus to illuminate an illumination region are provided. The illumination control system includes a structure light emitting module, an image capturing module, an image analyzing module and a light modulating module. The structure light emitting module is adapted to emit a structure light to the illumination region. The image capturing module is adapted to capture an image formed by the structure light emitted to the illumination region. The image analyzing module is adapted to receive and analyze the image to obtain a luminance variation of the illumination region. The light modulating module is coupled to the illumination apparatus and adapted to adjust illumination conditions of the illumination region according to the luminance variation.

Description

Lighting control system and lighting control method

The present invention relates to a lighting control system and a lighting control method, and more particularly to a lighting control system and a lighting control method that can adjust lighting conditions according to environmental changes.

Due to the high awareness of green energy conservation, high-efficiency and low-pollution energy-saving products continue to evolve, and the energy-saving control system with green technology plays an important role. In addition to replacing high-efficiency light sources, the current energy-saving lighting focuses on how to use the lighting control system to integrate indoor artificial lighting and external ambient light to create a comfortable and energy-saving high-quality lighting environment.

The common lighting control system uses multiple illumination detectors as indoor space light detectors, which are dispersed in the indoor space and used as the basis for analyzing the lighting quality of the control system. This type of design requires multiple illuminance meters to be distributed in the indoor space. The line configuration is complex, and the number of illuminance meters corresponds to the measurement resolution. To obtain more accurate data, more illuminance meters must be installed, and the cost will be greatly increased.

The illumination control system and the illumination control method of the invention do not need to provide multiple detectors at various positions in the illumination area to perform spatial illumination detection and feedback to the illumination control system, thereby achieving more accurate overall area illumination quality analysis and object image recognition. The effect.

In addition, the illumination control system and the illumination control method of the present invention can be applied to indoor illumination to adjust lighting conditions according to environmental changes, such as external illumination changes or object movements, and effectively control the balance between daytime ambient light and indoor illumination.

Based on the above, the illumination control method proposed by the present invention is applicable to a lighting device that illuminates an illumination area. This lighting control method first provides a structured light to the illuminated area. And capturing a first image generated by the structured light being projected onto the illumination area at a first time point, and capturing a second image generated by the structured light being projected onto the illumination area at a second time point. Then, the first image and the second image are compared to obtain a luminance change of the illumination area. Thereafter, the illumination conditions of the illumination area can be adjusted according to the change in luminance of the illumination area.

In another aspect, the lighting control system of the present invention uses the foregoing lighting control method, which mainly includes a structured light emitting module, an image capturing module, an image analyzing module, and a dimming module. The structured light emitting module is configured to emit the structured light to the illumination area. The image capturing module is configured to capture a first image generated by the structured light being projected onto the illumination area at a first time point, and to capture a second image generated by the structured light being projected to the illumination area at a second time point. The image analysis module is configured to receive and compare the first image and the second image to obtain a luminance change of the illumination area. The dimming module is coupled to the illumination device for adjusting the illumination condition of the illumination area according to the change of the brightness of the illumination area.

The change in luminance of the illumination region is, for example, a change in luminance of a partial region or a change in luminance of the entire region. Furthermore, adjusting the illumination conditions of the illumination area is, for example, adjusting the illumination intensity or illumination distribution of the illumination device. The pattern of structured light can be a grid pattern, a grid pattern, a concentric pattern, a random pattern, or any possible design.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a flow chart of a lighting control method in accordance with an embodiment of the present invention. 2 illustrates a lighting control system applying the lighting control method of FIG. 1 in accordance with an embodiment of the present invention.

Referring to FIGS. 1 and 2, the illumination control system 100 of the present embodiment is coupled to the illumination device 200 for controlling a state in which an illumination area is illuminated. The lighting control system 100 includes a structured light emitting module 110, an image capturing module 120, an image analyzing module 130, and a dimming module 140. The structured light emitting module 110 is configured to emit structured light to the illumination area, as shown in step S1. The image capturing module 120 is configured to capture a first image generated by the structured light being projected onto the illumination area at a first time point, as shown in step S2. And, at a second time, a second image generated by the structured light being projected onto the illumination area is captured, as shown in step S3. The image analysis module 130 is configured to receive and compare the first image and the second image to obtain a luminance change of the illumination region, as shown in step S4. In addition, the dimming module 140 is coupled to the illumination device 200 for adjusting the illumination condition of the illumination region according to the luminance change of the illumination region, as shown in step S5.

The aforementioned illumination area may be an indoor area or an outdoor area. In other words, the lighting control system 100 of the present embodiment can be applied to various environments. FIG. 3 illustrates a system architecture for applying lighting control system 100 to indoor lighting. As shown in FIG. 3, a light source as a structured light emitting module 110 is disposed above the illumination area 160 and scanned within the illumination area 160 to project the structured light 112 to a wall, floor, object or human body within the illumination area 160. The structured light 112, as shown in FIG. 3, can be a grid pattern, a grid pattern, a concentric pattern, a random pattern, or any possible design. Here, the structured light 112 may be visible or invisible, and the wavelength may be between 200 nm (nano) and 2000 nm, such as infrared. An image capturing module 120 is disposed above the illumination area 160, and is, for example, a CCD (Charge Coupled Device) camera for capturing an image generated by the structured light 112 projected onto the illumination area 160 (ie, the first image) And the second image). In this embodiment, the structured light emitting module 110 and the image capturing module 120 are disposed at different corners. However, in other embodiments of the present invention, the structured light emitting module 110 and the image capturing module may also be selected. 120 adjacent settings, or even integrated in the same device.

The image capturing module 120 can capture the image generated by the structured light projected onto the illumination area, wherein the first image captured at the first time point can be used as a comparison basis, and The second image captured at the second time point is compared with the first image by the image analysis module 130. Under the fixed optical conditions of the image capturing module 120, external light (such as sunlight) changes, object movement and the like may cause the image exposure of the image formed by the structured light to be changed, that is, the image capturing module 120 captures There is a change in luminance between the first image and the second image. The image analysis module 130 can feed back the brightness change to the dimming module 140 to adjust the illumination condition of the illumination area as a reference for adjusting the illumination device 200. Adjustments to the lighting conditions herein may include adjusting the illumination intensity of the illumination device 200 or the illumination distribution of the illumination device 200 within the illumination region 160.

Based on the above, the lighting control system 100 of the present embodiment can adjust the indoor lighting conditions according to, for example, external illumination changes, indoor object setting changes, or personnel movements, and can effectively control the balance between external light and indoor lighting to create comfort. And energy-saving high-quality lighting environment.

FIG. 4 further illustrates a specific implementation flow of the present invention by applying the foregoing illumination control method and the illumination control system 100 for image analysis and dimming control. Referring to FIG. 2, FIG. 3 and FIG. 4, first, the initial reference image capture is performed, wherein the structured light emitting module 110 turns on and emits the structured light 112 to the illumination area 160, and the image capturing module 120 is at the first time point. The first image Image(0) of the illumination area 160 is taken as an initial reference image, and then the structured light emitting module 110 is turned off. Thereafter, the structured light projection and the image capturing operation may be repeated at different time points (eg, the second time point), and the captured second image Image(i) and the initial reference image Image(0) are used by the image analyzing module 130. (ie, the first image) performs an analysis comparison to obtain a luminance change Difference{Image(0), Image(i)} between the two.

In the above, the dimming module 140 can select whether to adjust the illumination condition of the illumination area according to the obtained luminance change Difference{Image(0), Image(i)}. In the present embodiment, the following three cases can be roughly classified. In the first case, there is no significant change in the luminance between the second image Image(i) and the initial reference image Image(0), that is, the luminance change is within a threshold, and the illumination condition of the illumination region is not adjusted. In the second case, the luminance of the portion of the illumination region changes as compared with the initial reference image Image(0). As shown in FIG. 5, the partial region 112a of the structured light 112 is deformed. This is usually because the configuration of the object in the illumination area changes or the person enters the illumination area, etc., so that it is possible to adjust the illumination conditions of the partial illumination area, such as increasing or decreasing the illumination intensity of the area. In addition, in the third case, the brightness of the overall illumination area changes as compared with the initial reference image Image(0), as shown in FIG. 6A or 6B. This may be that the object in the illumination area has no movement change, but the external light changes, such as morning and afternoon, or evening sunshine changes, causing the indoor natural light illumination to change, so that the illumination condition of the overall illumination area can be adjusted, for example, image analysis is Darkening of the area increases the illumination intensity of the illumination device, and if the area becomes brighter, the illumination intensity of the illumination device is reduced. The difference between FIG. 6B and FIG. 6A is that there is a stationary object in the illumination area of FIG. 6B, so that the original initial reference image Image(0) has an irregular pattern.

In addition to the aforementioned adjustment of ambient lighting conditions according to external illumination changes, indoor object setting changes, personnel movement and the like to control the balance between external light and indoor lighting, the lighting control method and lighting control system of the present invention can also integrate safety monitoring. The function. Referring to FIG. 1 and FIG. 2 again, the image analysis module 130 can be coupled to a security monitoring system, and can identify the moving object in the illumination space according to the first image and the second image, as shown in step S6. More specifically, for example, when a moving object (such as a person) enters the illumination area, the image analysis module 130 can transmit a notification message, including image information, to the security monitoring system 300, as shown in step S7; and, can be moved When the object enters the illumination area, the dimming module 140 is driven to turn on the illumination device 200, as shown in step S8.

Of course, the application of the illumination control method and the illumination control system of the present invention is not limited to the indoor area, but can also be applied to outdoor areas such as public places, road lighting, and the like. FIG. 7 illustrates a system architecture for applying the aforementioned lighting control system 100 to outdoor lighting. Figure 7 shows the use of street lights to illuminate roads. A street light 720 as a lighting device is disposed beside the road 710. The street light 720 itself can integrate the lighting control system 100, and the structured light emitting module 110 and the image capturing module 120 (such as a CCD camera) are disposed outside the street light 720, and the image analysis is performed. The module 130 and the dimming module 140 are disposed inside the street lamp 720. The structured light emitting module 110 can project the structured light 112 to the surface of the road 710 as described in various embodiments above. The image capturing module 120 captures the image generated by the structured light 112 projected to the illumination area 160 and performs an analysis comparison. When the external environment changes, the image captured by the image capturing module 120 changes, and the image analyzing module 130 can adjust the lighting device 200 via the dimming module 140. For example, as the daylight changes, the light intensity of the street light 720 is increased or decreased, or when a person or vehicle passes the road 720, the street light 720 can be turned on, and the street light 720 is turned off when the person or the vehicle leaves the road 720 to effectively utilize the light source, thereby reducing Energy loss.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Lighting control system

110. . . Structured light emitting module

112. . . Structured light

112a. . . Part of the structured light

120. . . Image capture module

130. . . Image analysis module

140. . . Dimming module

160. . . Lighting area

200. . . Lighting device

300. . . Security monitoring system

710. . . the way

720. . . Street light

S1~S8. . . step

1 is a flow chart of a lighting control method in accordance with an embodiment of the present invention.

2 illustrates a lighting control system applying the lighting control method of FIG. 1 in accordance with an embodiment of the present invention.

3 illustrates a system architecture for applying the lighting control system of FIG. 2 to indoor lighting.

FIG. 4 illustrates a specific implementation flow of image analysis and dimming control according to the present invention.

Figure 5 is a diagram showing an image comparison of changes in the local illumination area.

6A and 6B show image comparison diagrams of changes in two overall illumination areas.

7 illustrates a system architecture for applying the lighting control system of FIG. 2 to outdoor lighting.

S1~S8. . . step

Claims (16)

A lighting control system is suitable for illuminating an illumination area, the illumination control system comprising: a structured light emitting module for emitting a structured light to the illumination area; and an image capture module for Taking a first image generated by the structured light projected onto the illumination area at a first time point, and capturing a second image generated by the structured light being projected onto the illumination area at a second time point; The image analysis module is configured to receive and compare the first image and the second image to obtain a brightness change of the illumination area; and a dimming module coupled to the illumination device for determining the illumination area The brightness changes to adjust the lighting conditions of the illuminated area. The lighting control system of claim 1, wherein the brightness change of the illumination area comprises a change in luminance of a partial area or a change in luminance of the entire area. The illumination control system of claim 1, wherein adjusting the illumination condition of the illumination area comprises adjusting an illumination intensity or a light distribution of the illumination device. The illumination control system of claim 1, wherein the pattern of structured light comprises a grid pattern, a grid pattern, a concentric pattern or a random pattern. The lighting control system of claim 1, wherein the illumination area is an indoor area. The illumination control system of claim 1, wherein the image analysis module further identifies a moving object in the illumination space according to the first image and the second image. The lighting control system of claim 6, wherein the image analysis module is coupled to a security monitoring system for transmitting a notification message to the security monitoring system when the moving object enters the lighting area. The illumination control system of claim 6, wherein the image analysis module turns on the illumination device when the moving object enters the illumination area. A lighting control method is applicable to an illumination device for illuminating an illumination area, the illumination control method comprising: providing a structured light to the illumination area; and capturing the structured light to the illumination area at a first time point Generating a first image; capturing a second image generated by the structured light projected to the illumination area at a second time point; comparing the first image with the second image to obtain a brightness change of the illumination area And adjusting the illumination condition of the illumination area according to the change in luminance of the illumination area. The illumination control method of claim 9, wherein the luminance change of the illumination region comprises a luminance change of a partial region or a luminance variation of the entire region. The illumination control method of claim 9, wherein adjusting the illumination condition of the illumination area comprises adjusting an illumination intensity or a light distribution of the illumination device. The illumination control method of claim 9, wherein the pattern of the structured light comprises a grid pattern, a grid pattern, a concentric pattern or a random pattern. The lighting control method of claim 9, wherein the illumination area is an indoor area. The lighting control method of claim 9, further comprising identifying a moving object in the illumination space according to the first image and the second image. The lighting control method of claim 14, further comprising transmitting a notification message to a security monitoring system when the moving object enters the lighting area. The lighting control method of claim 14, further comprising turning on the lighting device when the moving object enters the lighting area.