CN106973450A - Planar light source lighting device - Google Patents

Abstract

The present invention provides a planar light source illumination device, including: the light guide plate is provided with light emitting units at symmetrical positions on two sides, each light emitting unit at least comprises two light emitting components with different color temperatures, and light sources with different color temperatures are generated by controlling the light emitting brightness and the action of the light emitting components; an environment brightness sensing unit is used for sensing the color temperature of natural light of the environment; the controller can drive at least one light-emitting component to emit light according to the color temperature of the natural light detected by the ambient brightness sensing unit and adjust the brightness of the light-emitting component, so that the planar light source lighting device capable of simulating the illumination and illumination modes of the natural light is provided; the invention further comprises a color temperature sensor for sensing the color temperature of the light emitted by the light emitting component through the light guide plate, and further automatically feeding back and correcting the output lighting color.

Description

Flat light source lighting device

technical field

The invention relates to a lighting device, in particular to a planar light source lighting device that can automatically adjust the light color of lighting and simulate the lighting mode of natural light.

Background technique

Due to the advancement of science and technology, the light sources used in lighting devices range from early incandescent lamps (such as tungsten lamps, halogen lamps), discharge lamps (such as fluorescent lamps, mercury lamps, sodium lamps) to solid light sources (such as light-emitting diodes, LEDs) and so on. Light sources with color temperature and characteristics have been successfully developed and marketed. On the other hand, due to the improvement of living standards, the main purpose of using lighting devices is no longer just to provide light sources at night or in dark places. It has become the mainstream to choose lighting devices with suitable light sources according to the places and purposes of use.

Generally speaking, in addition to considering the illuminance provided by the lighting device, the selection principle of the lighting device is mainly the color temperature of the light source. In most cases, the light source generated by the lighting device should be close to the natural light source. Generally speaking, natural light source refers to sunlight. Sunlight is the largest light source in nature and the most important light source for the survival of all living things. The color temperature of sunlight is not constant from sunrise to sunset in a day. The sunlight at noon is stronger, and the color temperature is about It is about 5500K, and the color temperature of orange sunlight in the morning and afternoon is relatively low, about 2700K-4000K. Sunlight with different brightness and color temperature has a great impact on the work and rest of living things and the biological clock. The natural light source during the day has a higher color temperature, while the natural light source at dusk has a lower color temperature. The human brain will be more energetic under high color temperature lighting. Under low color temperature lighting, it is considered that it is time to sleep. Therefore, it is better to adjust the color temperature of the lighting device.

It is known that most lighting devices are designed with fixed light sources. The color temperature of commonly used light sources generally includes: the color temperature of traditional incandescent bulbs is about 2800K, the color temperature of warm fluorescent lamps (warm fluorescent lamps) is about 3500K, and daylight color fluorescent lamps ( Daylight color fluorescent lamp) has a color temperature of about 6500K, and the above purpose of adjusting the color temperature cannot be achieved because the light source cannot be adjusted or changed.

Contents of the invention

The object of the present invention is to propose a planar light source lighting device that can automatically adjust the light color of lighting and simulate the lighting mode of natural light.

To achieve the above purpose, an embodiment of the planar light source lighting device of the present invention includes:

A light guide plate, a light-emitting unit is arranged at a symmetrical position on both sides of the light-guide plate, and any light-emitting unit includes at least two light-emitting components with different color temperatures;

An ambient brightness sensing unit is used to sense the color temperature of natural light in the environment; and

A controller, the controller is electrically connected with the light-emitting component of the light-emitting unit and the ambient brightness sensing unit, the controller can drive the light-emitting component of the light-emitting unit to act (emit light or not emit light) according to the color temperature of natural light detected by the ambient brightness sensor unit, And adjust the brightness of the light-emitting components.

In an embodiment of the planar light source lighting device of the present invention, any light-emitting unit includes light-emitting components with color temperatures of 2700K and 6500K.

In an embodiment of the planar light source lighting device of the present invention, the light-emitting component of any light-emitting unit is a light-emitting diode (LED).

In an embodiment of the planar light source lighting device of the present invention, the controller synchronously controls the actions of the light-emitting components of the light-emitting units located symmetrically on both sides of the light guide plate, and adjusts the brightness of the light-emitting components.

In an embodiment of the planar light source lighting device of the present invention, the controller can respectively control the actions of the light-emitting components of the light-emitting units at symmetrical positions on both sides of the light guide plate, and adjust the brightness of the light-emitting components.

In an embodiment of the planar light source lighting device of the present invention, the ambient brightness sensing unit is electrically connected to the controller through wireless communication, and transmits the color temperature signal of the natural light color temperature detected by the ambient brightness sensing unit to the controller through wireless communication.

Another embodiment of the planar light source lighting device of the present invention includes: a color temperature sensor electrically connected to the controller, the color temperature sensor is used to sense the color temperature of the light emitted by the light-emitting component through the light guide plate and then send it to the controller for automatic feedback Corrects the light color of the output lighting light.

In another embodiment of the planar light source lighting device of the present invention, the controller can control the brightness change of the light-emitting component.

In an embodiment of the planar light source lighting device of the present invention, the light-emitting components of any light-emitting unit can be light-emitting diodes (LEDs) of different colors, which can generate different light colors to simulate lighting modes including: clear sky and green leaves.

In another embodiment of the planar light source lighting device of the present invention, the controller can control the action of the light emitting components of the light emitting unit according to a preset time.

Through the above description, it can be understood that the planar light source lighting device of the present invention can automatically adjust the light color of the lighting and simulate the lighting of natural light by controlling the luminance of the light-emitting components and their actions according to the color temperature of natural light detected by the ambient brightness sensing unit. mode, on the other hand, can also automatically feed back and correct the output lighting color.

Regarding the specific implementation manner of the present invention and its technical features and effects, the following will be described with reference to the accompanying drawings.

Description of drawings

Fig. 1 is a functional block diagram of an embodiment of the present invention;

Fig. 2 is a functional block diagram of another embodiment of the present invention;

Fig. 3 is a functional block diagram of another embodiment of the present invention;

Fig. 4 is a functional block diagram of another embodiment of the present invention;

FIG. 5 is a functional block diagram of another embodiment of the present invention.

Symbol Description

10 light guide plate

20 first lighting unit

30 Second lighting unit

40 Ambient brightness sensing unit

41 The first wireless communication unit

50 controllers

51 Second wireless communication unit

52 micro control unit

53 power converter

60 color temperature sensor

L1A, L1B, L2A, L2B lighting components

S power supply terminal

detailed description

First please refer to FIG. 1 , which is a functional block diagram of an embodiment of the planar light source lighting device of the present invention. As shown in Figure 1, the planar light source lighting device of the present invention includes:

A light guide plate 10, a first light emitting unit 20 and a second light emitting unit 30 are respectively arranged on the light incident side of the symmetrical position on both sides of the light guide plate 10, and the first light emitting unit 20 and the second light emitting unit 30 include at least two kinds of light emitting devices with different color temperatures. Light-emitting components L1A, L1B, L2A, and L2B (for the convenience of the following description and understanding, those with the same English letters in the last digits of the symbols of the light-emitting components in the drawings represent light-emitting components with the same color temperature), use the light guide plate 10 to guide the light-emitting components The light generated by L1A, L1B, L2A and L2B is emitted from the front of the light guide plate 10;

An ambient light sensing unit 40 (Ambient Light Sensor, ALS), the ambient light sensing unit 40 is used to sense the natural light color temperature of the environment and convert it into a corresponding first color temperature signal; and

A controller 50, the controller 50 is electrically connected with the light emitting components L1A, L1B, L2A and L2B of the first light emitting unit 20 and the second light emitting unit 30 and the ambient brightness sensing unit 40, the controller 50 can sense the The first color temperature signal detected by the unit 40 drives the light-emitting components L1A, L1B, L2A, and L2B of the first light-emitting unit 20 and the second light-emitting unit to emit light, and modulates the brightness of the light-emitting components L1A, L1B, L2A, and L2B.

In an embodiment of the present invention, an embodiment of the light-emitting components L1A, L1B, L2A and L2B is a light-emitting diode, preferably an LED light bar (LED Bar); in an embodiment of the present invention, the first light-emitting unit 20 And the second light-emitting unit includes a light-emitting component L1A with a color temperature of 2700K and a light-emitting component L1B with a color temperature of 6500K. By controlling the actions of the light-emitting components L1A, L1B, L2A and L2B and their brightness, they can be combined to produce different Color temperature and brightness of illumination light; however, the color temperature of the light-emitting components L1A, L1B, L2A and L2B that can be used in the present invention is not limited to the above-mentioned embodiments, and two or more light-emitting components with different color temperatures can be used as needed.

In one embodiment of the planar light source lighting device of the present invention, the light-emitting components of any light-emitting unit can be light-emitting diodes (LEDs) of different colors or a combination thereof, and the colors of the light-emitting diodes include but are not limited to white light-emitting diodes, red light-emitting diodes, Any one or a combination of diodes, blue light emitting diodes and green light emitting diodes, through the controller 50 to control the action (emission or non-emission) and brightness of the light emitting diodes, can produce different light colors for simulating the inclusion of: clear sky and Green leaf situation lighting mode; in an example of the present invention, the flat light source lighting device of the present invention can be installed on the ceiling or wall of the building, used as a lighting fixture or an atmosphere lamp for decorative purposes, for example, it can simulate the blue and white light color of the clear sky , or imitate the green environment of forest green leaves, and the gradual change effect of light color, for example, gradually change the light color and brightness from one side of the plane light source to the other side, so as to achieve the effect of simulating the change of natural light , which can provide urban buildings with a lighting mode that simulates the natural environment.

In an embodiment of the present invention, the environment brightness sensing unit 40 is preferably installed at a position capable of sensing natural light sources, so as to sense the color temperature of natural light in the environment and convert it into a corresponding first color temperature signal, and then convert the second color temperature signal to A color temperature signal is sent to the controller 50 . In the first embodiment of the present invention, as shown in Figure 1 and Figure 3, the ambient brightness sensing unit 40 is electrically connected to the controller 50 through wires, in another embodiment, as shown in Figure 2 and Figure 4, the environment The brightness sensing unit 40 is electrically connected to the controller 50 through wireless communication. In one embodiment, the ambient brightness sensing unit 40 is provided with a first wireless communication unit 41, and the controller 50 is provided with a second wireless communication unit. 51 can carry out signal transmission with the first wireless communication unit 41, wherein the first wireless communication unit 41 and the second wireless communication unit 51 can be Bluetooth communicators, preferably low power consumption Bluetooth modulators (Bluetooth Low Energy Module ,BLE Module).

In an embodiment of the present invention, the controller 50 is a digital controller, one of which includes: a micro control unit 52 (Micro Controller Unit, MCU) and a power converter 53 (Converter), the power converter The input side of the power converter 53 is electrically connected to a power supply terminal S (such as a constant voltage power supply), and the output side of the power converter 53 is connected to the light-emitting components L1A, L1B, and L2A of the first light-emitting unit 20 and the second light-emitting unit 30. It is electrically connected with L2B. In an embodiment of the present invention, the power converter 53 can be a DC-DC converter (DD Converter); the micro control unit 52 is electrically connected with the ambient brightness sensing unit 40, and the micro control unit 52 can be Generate a pulse width modulation (Pulse Width Modulation, PWM) signal according to the natural light color temperature detected by the ambient brightness sensing unit 40, and control the output mode of the power converter 53 (such as constant current or constant voltage) through the PWM signal, and then pass the power The converter 53 drives the light-emitting components L1A, L1B, L2A and L2B to act (emit light or not) and modulates the brightness of the light-emitting components L1A, L1B, L2A and L2B.

In an embodiment of the present invention, the controller 50 can synchronously control the first type of light-emitting components L1A and L2A with the same color temperature in the first light-emitting unit 20 and the second light-emitting unit 30 , and the second type of light-emitting components L1B and L2A with the same color temperature. The action of L2B and the adjustment of its brightness, one implementation is to connect the light-emitting components (L1A and L2A) and (L1B and L2B) with the same color temperature in the first light-emitting unit 20 and the second light-emitting unit 30 in series or in parallel is electrically connected to the controller 50 in a manner that is shown in FIG. 1 as a series connection (but not limited thereto), and the controller 50 can simultaneously drive the first light-emitting unit 20 and the second light-emitting unit 30 to have the same color temperature. The components (L1A and L2A) and (L1B and L2B) act, for example, simultaneously drive the light-emitting components (L1A and L2A) with a color temperature of 2700K in the first light-emitting unit 20 and the second light-emitting unit 30 to light up, and after the color temperature of natural light increases , under the condition of maintaining the light-emitting components (L1A and L2A) at 2700K to light up, simultaneously drive the light-emitting components (L1B and L2B) with a color temperature of 6500K in the first light-emitting unit 20 and the second light-emitting unit 30 to light up, and pass The brightness of the light-emitting components L1A, L1B, L2A and L2B is adjusted to achieve the purpose of automatically adjusting the light color of the lighting and simulating natural light.

Please refer to FIG. 3 , which is a functional block diagram of another embodiment of the planar light source lighting device of the present invention. The functional architecture of the light guide plate 10, the first light emitting unit 20, the second light emitting unit 30, the ambient brightness sensing unit 40 and the controller 50 is the same as that of the embodiment in FIG. The action of any light-emitting assembly L1A, L1B, L2A, and L2B in the first light-emitting unit 20 and the second light-emitting unit 30 and the adjustment of its brightness, therefore, by controlling the light-emitting unit on one side of the light guide plate 10 (the first light-emitting unit 20 and any one of the second light-emitting unit 30) in any one of the light-emitting components L1A, L1B, L2A or L2B and adjust its brightness, for example, half of the light guide plate 10 emits light (bright) while the other half does not emit light ( Dim), and then can realize the natural lighting mode that simulates the sun's slanting sunlight in the morning and dusk.

Please refer to FIG. 5 , which is a functional block diagram of another embodiment of the planar light source lighting device of the present invention. Wherein the functional architecture of the light guide plate 10, the first light emitting unit 20, the second light emitting unit 30, the ambient brightness sensing unit 40 and the controller 50 is the same as that of the embodiment of FIG. The micro control unit 52 of the device 50 is electrically connected, and the color temperature sensor 60 is used to sense the color temperature of the light emitted by the light emitting components L1A, L1B, L2A and L2B through the light guide plate 10 and convert it into a corresponding second color temperature signal, and then send it to The micro control unit 52 adjusts the pulse width modulation (Pulse Width Modulation, PWM) signal according to the second color temperature signal detected by the color temperature sensor 60, adjusts the output mode of the power converter 53 through the PWM signal, and then automatically feeds back Corrects the light color of the output lighting light.

In another embodiment of the planar light source lighting device of the present invention, the controller 50 can control the actions of the light-emitting components L1A, L1B, L2A, and L2B in the first light-emitting unit 20 and the second light-emitting unit 30 according to a preset time and adjust their Brightness; in another embodiment of the present invention, the controller 50 can control the actions of the light-emitting components L1A, L1B, L2A and L2B in the first light-emitting unit 20 and the second light-emitting unit 30 according to the preset time, and control the light-emitting component L1A , L1B, L2A, and L2B brightness changes, for example, controlling the brightness of the light-emitting components L1A, L1B, L2A, and L2B to gradually increase their brightness from dim to realize a wake-up mode function.

Although the present invention has been disclosed above through the above-mentioned embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of patent protection for an invention shall be determined by the content of the claimed invention.

Claims (12)

1. A planar light source lighting device, characterized in that, comprising: A light guide plate, each of which is provided with a light-emitting unit at symmetrical positions on both sides of the light guide plate, and each light-emitting unit includes at least two light-emitting components with different color temperatures; An ambient brightness sensing unit, used for sensing the color temperature of natural light in the environment and converting it into a corresponding first color temperature signal; and a controller, the controller is electrically connected with the light-emitting component of the light-emitting unit and the ambient brightness sensing unit, the controller can obtain the first color temperature signal detected by the ambient brightness sensing unit, and the controller is based on The first color temperature signal drives the light-emitting component of the light-emitting unit to operate, and modulates the brightness of the light-emitting component. 2. The planar light source lighting device according to claim 1, wherein each light-emitting unit comprises a first type of light-emitting component with a color temperature of 2700K and a second type of light-emitting component with a color temperature of 6500K, and the light-emitting component is a light-emitting diode . 3. The planar light source lighting device according to claim 1, wherein the light-emitting components of each light-emitting unit are light-emitting diodes of different colors or a combination thereof. 4. The planar light source lighting device according to claim 3, wherein the color of the light-emitting diodes of each light-emitting unit includes any one of white light-emitting diodes, red light-emitting diodes, blue light-emitting diodes and green light-emitting diodes or a combination thereof. 5. The planar light source lighting device according to claim 1, wherein the controller comprises: a micro control unit and a power converter, the input side of the power converter is electrically connected to a power supply end, the The output side of the power converter is electrically connected to the light-emitting component of the light-emitting unit, the micro-control unit is electrically connected to the ambient brightness sensing unit, and the micro-control unit can pass a pulse width modulation signal according to the first color temperature signal The output mode of the power converter is controlled, and the power converter is used to drive the light-emitting component to act and adjust the brightness of the light-emitting component. 6. The planar light source lighting device according to claim 1, wherein the controller synchronously controls the actions of the light-emitting components with the same color temperature in the light-emitting units at symmetrical positions on both sides of the light guide plate, and adjusts the The brightness of the light component. 7. The planar light source lighting device according to claim 1, wherein the controller can respectively control the action of the light-emitting components of the light-emitting unit at symmetrical positions on both sides of the light guide plate, and adjust the brightness of the light-emitting components . 8. The planar light source lighting device according to claim 1, wherein the ambient brightness sensing unit is electrically connected to the controller through wireless communication, and transmits the first color temperature signal to the controller through wireless communication. 9. The planar light source lighting device according to claim 1, wherein the ambient brightness sensing unit is provided with a first wireless communication unit, and the controller is provided with a second wireless communication unit that can communicate with the first wireless communication unit The transmission of the first color temperature signal is performed. 10. The planar light source lighting device according to claim 1, characterized in that it comprises: a color temperature sensor electrically connected to the controller, the color temperature sensor is used to sense the color temperature of the light emitted by the light-emitting component through the light guide plate , and converted into a corresponding second color temperature signal and then sent to the controller, and the controller automatically feeds back and corrects the light color of the output lighting light according to the second color temperature signal. 11 . The planar light source lighting device according to claim 1 , wherein the controller can control the action of the light emitting component of the light emitting unit according to a preset time. 12. The planar light source lighting device according to claim 1, wherein the controller can control the action of the light-emitting component of the light-emitting unit according to a preset time, and control the brightness change of the light-emitting component.