Street lighting system with dual color temperature and street lighting with dual color temperature

Abstract

A street lighting system with dual color temperature, including: several first lights arranged in a warning zone of a road, each equipped internally with a first light source module with a first color temperature; and several second lights, arranged in a normal area of ​​the street and each equipped inside with a second light source module with a second color temperature; wherein the normal area and the warning area are adjacent and arranged in such a way that vehicles, in relation to the direction of travel of vehicles on the road, move from the normal area towards the warning area; where the first color temperature is higher than the second color temperature.

Description

Field of invention

[0001] The present invention relates to a lighting device and in particular to a street lighting system with double color temperature and a street light with double color temperature. State of the art

[0002] Conventional street lighting systems predominantly use light sources with a fixed color temperature (for example, consistently yellowish light sources with a low color temperature) and cannot accommodate the varying lighting requirements of different road areas (such as warning zones and traffic zones). For instance, in areas where drivers need to be warned or alerted to hazards, such as at crosswalks, school entrances, and curves, the sole use of ordinary traffic lighting (e.g., yellowish light) is insufficient to provide adequate warning. At the same time, existing lighting devices and systems lack regionally differentiated design and adaptable mechanisms, preventing individual configuration or optimization of light sources based on the use or risk level of the road areas.

[0003] To solve the above-mentioned problems in the prior art, the present invention proposes a street lighting system with double the color temperature and street lighting with double the color temperature. Object of the invention

[0004] The invention is based on the objective of avoiding the aforementioned disadvantages and providing a street lighting system with dual color temperature and street lighting with dual color temperature, which effectively improves road safety and reduces the accident rate at intersections.

[0005] To solve the above-mentioned problem, the present invention provides a street lighting system with dual color temperature, comprising several first luminaires and several second luminaires, wherein the first luminaires are arranged in a warning zone of a road and are each provided internally with a first light source module having a first color temperature, and the second luminaires are arranged in a normal zone of the road and are each provided internally with a second light source module having a second color temperature, wherein the normal zone and the warning zone are adjacent and arranged such that vehicles, in relation to the direction of travel of vehicles on the road, move from the normal zone towards the warning zone, wherein the first color temperature is higher than the second color temperature.

[0006] In one embodiment of the present invention, the first color temperature is in the range of 4500 K to 6500 K, while the second color temperature is in the range of 2700 K to 3500 K.

[0007] To solve the aforementioned problem, the present invention further provides a street light with dual color temperature, comprising a luminaire body, a first light source module, a second light source module, and a control unit, wherein the first light source module is arranged in the luminaire body and has a first color temperature, the second light source module is arranged in the luminaire body and has a second color temperature, and the second color temperature is higher than the first color temperature, wherein the control unit is electrically connected to the first light source module and the second light source module and switches the light source output status of the first light source module and the second light source module according to a control condition.where, by switching the control condition to activate the first light source module, the street lighting with double the color temperature is used as the first light, and by switching the control condition to activate the second light source module, the street lighting with double the color temperature is used as the second light, and the first and second color temperatures are set.

[0008] In one embodiment of the present invention, the control condition comprises a schedule, environmental sensing data, user-defined commands, remote control signals, or a combination thereof.

[0009] In one embodiment of the present invention, the environmental sensing data are either ambient light sensing data or weather sensing data, wherein the control according to the ambient light sensing data or weather sensing data controls the first light source module and the second light source module of the street lighting with double the color temperature.

[0010] In one embodiment of the present invention, the dual-color-temperature street lighting system further comprises a communication module that is electrically connected to the controller, wherein the controller transmits data via the communication module to an external remote management platform, so that the controller either receives a remote control signal or uploads the information on the status of the dual-color-temperature street lighting, wherein the information on the status of the street lighting includes at least the first color temperature and the second color temperature.

[0011] In one embodiment of the present invention, the controller is a programmable logic controller, a microcontroller, or an edge computing module.

[0012] As described above, the dual-color-temperature street lighting system and the dual-color-temperature street lighting of the present invention are designed according to theories of human vision. In a warning zone of a road (for example, at intersections), luminaires with a high color temperature (white light) are arranged, while in a normal zone of the road (for example, road sections outside the warning zones), luminaires with a low color temperature (yellowish light) are installed. The present invention therefore uses luminaires with different color temperatures to create a visual color contrast in the driver's field of vision and thereby increase driving concentration when approaching the warning zone, so that pedestrians at intersections can be perceived more easily, and the flexibility of the street lighting can be improved, taking human factors into account.Therefore, the invention is suitable for various street lighting installations in smart cities. Brief description of the drawings Fig. Figure 1 shows a schematic view of the street lighting system with dual color temperature according to a first embodiment of the present invention; Fig. Figure 2 shows a schematic view of the street lighting system with dual color temperature according to a second embodiment of the present invention; Fig. Figure 3 shows a block diagram of the street lighting with double color temperature according to the present invention. Detailed description of the exemplary implementations

[0013] The exemplary embodiments of the present invention are described in detail and in full below with reference to the drawings. In the drawings and the description, the same reference numerals denote identical or similar elements. Shapes and thicknesses may be exaggerated in the drawings for the sake of simplicity and ease of notation. It is understood that elements not specifically shown in the drawings or described in the description are known to a person skilled in the art. A person skilled in the art may make various changes and modifications based on the content of the present invention.

[0014] In the present invention, the term "warning zone" generally refers to road sections with higher traffic flow or a high risk of dangerous situations, i.e., hazard zones. These include, for example, intersections, pedestrian crossings, approach areas to driveways, curve entry areas, road sections in front of schools, or other areas where increased warning is required. In the exemplary embodiments of the present invention, the term "normal zone" generally refers to those road sections outside the warning zones that are primarily intended for stable traffic flow and can also be described as general road sections. The normal zone can be further subdivided, as needed, into lane areas for straight-ahead travel, turning areas, and the like.Unless explicitly stated otherwise, the term "road area" used in this description includes both the "warning area" and the "normal area".

[0015] It will be on Fig. 1 Reference is made to the invention. A road area comprises a warning area A and a normal area B. The street lighting system according to the invention with dual color temperature 1 comprises several first luminaires 11 and several second luminaires 12, wherein the first luminaires 11 are arranged in the warning area A of a road and are each provided internally with a first light source module 111 with a first color temperature, and the second luminaires 12 are arranged in the normal area B of the road and are each provided internally with a second light source module 121 with a second color temperature, wherein the normal area B and the warning area A are adjacent and are arranged such that vehicles, in relation to the direction of travel of vehicles on the road, travel from the normal area B towards the warning area A, wherein the first color temperature is higher than the second color temperature.

[0016] In the present embodiment of the invention, the first color temperature is preferably in the range of 4500 K to 6500 K, so that the first luminaires 11 can emit white light. The second color temperature is preferably in the range of 2700 K to 3500 K, so that the second luminaires 12 can emit yellowish light.

[0017] For example, traffic accident statistics show that up to 60% of accidents currently occur at intersections. To improve this situation, conventional measures typically focus on optimizing traffic signs, road markings, traffic lights, and road layouts. However, the influence of the lighting environment provided by streetlights on driving safety is completely ignored. The dual-color-temperature street lighting system 1 provided by the present invention can effectively improve lighting quality and warning effect. By changing the light color and color contrast between the roadway section and the intersection area, drivers' concentration is increased when approaching warning zone A, thereby effectively reducing the accident rate in warning zone A and simultaneously ensuring pedestrian safety when crossing.Pedestrians are more easily detected in warning zone A. Combined with the optimization of road layouts, traffic lights, road markings, and traffic signs, this offers pedestrians an even higher level of safety.

[0018] The present invention relates to a dual-color-temperature street lighting system 1, which takes into account both comfort and warning effect and is based on the visual properties of human vision and the spectral properties of the light sources, and in particular a system in which the user configures light sources with corresponding color temperatures in different areas to optimize nighttime visibility and the psychological state of drivers, thereby improving overall road safety for drivers and pedestrians. The influence of the color temperature selection for the light sources in warning area A on human factors is explained below:

[0019] (1) Regarding the structure of the human eye, the retina has light-sensitive cells consisting of cones and rods. The cones function mainly under bright daylight conditions, at an ambient brightness of usually more than 3 cd / m². 2 This is known as photopic vision. They are particularly sensitive to wavelengths around 555 nm (yellow-green light). Rods, on the other hand, function in low-light conditions at night, with an ambient brightness of typically less than 1 -3 cd / m 2 , which is known as scotopic vision. They are most sensitive to wavelengths in the range of approximately 507 nm (blue-green light).

[0020] (2) The ratio of the luminous flux produced by a light source under scotopic and photopic conditions is called the S / P ratio (scotopic / photopic ratio) and serves as an indicator of the suitability of a light source for use in low-illumination environments. The higher the S / P ratio, the more the pupil of the human eye constricts, thereby reducing the amount of interfering light entering the eye and significantly improving visual resolution and depth of field. This enhances the perception of the road at night. Conversely, a lower S / P ratio leads to pupil dilation, allowing more interfering light to enter and causing visual impairments such as scattering and blurring.Therefore, it is advisable to use the first luminaires 11 in warning zone A with a color temperature between 4500 K and 6500 K in order to match the visual characteristics of the human eye in scotopic vision mode. This can effectively increase visual clarity and improve the safety of drivers and pedestrians.

[0021] Furthermore, the following explains the human factors in relation to the color temperature configuration in normal range B of a street:

[0022] (1) The color temperature characteristics of a light source not only affect the visual perception of the human eye, but also have a significant impact on the driver's mental and physical state. While a higher signal-to-performance ratio (S / P) is present in a white light environment with a high color temperature, which can improve visual orientation and performance, prolonged exposure to high brightness and a stimulating lighting environment can easily lead to visual fatigue and mental stress in the driver, thereby impairing driving stability.

[0023] (2) In the normal area B, according to the present invention, several second luminaires 12 with a color temperature in the range of 2700 K to 3500 K are arranged. For the driver, the yellowish light environment not only provides a softer and more stable lighting effect, but also meets the human eye's need for long-lasting visual comfort. This reduces the driver's fatigue and increases stability and safety during night driving. Furthermore, due to its wavelength, yellowish light has better diffraction properties, so that a higher quality of road detection can be achieved under rain, fog, or smog conditions, thereby effectively improving the driver's ability to perceive the road conditions in reduced visibility.

[0024] In summary, the present invention provides a street lighting system with dual color temperature 1. In a warning zone A (for example, intersections, pedestrian crossings / zebra crossings, hazard zones, or other areas where nighttime visibility needs to be enhanced), first luminaires 11 with a first color temperature are arranged to produce white light, thereby significantly increasing the visual safety of vehicles and pedestrians at night and effectively reducing the risk of traffic accidents. In a normal zone B (for example, main roads or long-distance stretches), second luminaires 12 with a second color temperature are arranged to produce yellowish light, providing the driver with a comfortable and stable visual environment and alleviating visual fatigue and psychological stress. As described in Fig. As shown in Figure 1, the color difference between the lights in warning zone A and those in the adjacent normal zone B creates a brightness difference that is perceived by the human eye. From a traffic engineering perspective, this not only enables active control but also compensates for the shortcomings of conventional traffic lights and actively increases the level of road safety. At the same time, the accident rate is reduced in both warning zone A and normal zone B, thus better protecting pedestrians and implementing the concept of people-oriented mobility. By configuring the street lighting system with dual color temperature (Figure 1), a visual color contrast is created in the driver's field of vision, allowing for clearer perception of pedestrians at crosswalks when approaching an intersection, thereby providing pedestrians with greater protection.In this way, the accident rate at intersections is effectively reduced, and at the same time the four key performance indicators of street lighting are met, namely safety (strengthening order), comfort (reducing visual fatigue), attention (strengthening psychological alertness) and early warning (enhanced indication of danger areas), in order to achieve a holistic and human-centered street lighting design.

[0025] It will be on Fig. 2. Reference is made to the first embodiment. The difference between the present embodiment and the first embodiment is that the road area comprises warning zones A1 and A2. Other components identical to those described above are not explained again below. In the present embodiment, several first luminaires 11 are arranged in warning zone A1 and warning zone A2, while several second luminaires 12 are arranged in normal zone B. Warning zone A1 is an intersection area and includes the pedestrian crossing / zebra crossing, while warning zone A2 is an area where a "lateral connecting path" joins the main road. Normal zone B comprises all areas located outside warning zones A1 and A2. The illustration in Fig. 2 is for illustrative purposes only and should not be understood as restrictive.

[0026] Because the "side access road" connects to the main road, this area is typically considered a high-risk zone in traffic design. When drivers are traveling at high speed on the main road, blind spots easily develop at side junctions (e.g., alleys, side streets). If vehicles or pedestrians suddenly enter the driver's field of vision from the side, obstructions to visibility or delayed reaction times can cause accidents. Typically, areas where side access roads meet main roads lack adequate lighting or reflective devices, making traffic flow more difficult to discern at night. Drivers' attention at night is generally focused on the main road, while vigilance towards merging traffic or activity on side streets is reduced.Reaction times to lateral movements (such as vehicles or pedestrians coming from side streets) are increased, which raises the risk.

[0027] In the present embodiment, based on the previously described visual properties of the human eye and the spectral properties of the light source, several first luminaires 11 are arranged in warning zone A1 and warning zone A2. These emit white light with the first color temperature, effectively increasing the attention and alertness of drivers and pedestrians to achieve a stronger warning effect in the road area. In contrast, the several second luminaires 12 located in normal zone B emit yellowish light with the second color temperature, reducing visual fatigue during longer journeys and providing visual and psychological comfort comparable to that of the human eye. The first color temperature is in the range of 4500 K to 6500 K, while the second color temperature is in the range of 2700 K to 3500 K.Consequently, the street lighting system according to the invention with double color temperature 1 takes into account the safety, functionality and human-related causes of accidents in street lighting and can be used in areas such as dynamic light management and intelligent lighting.

[0028] It will be on Fig.3. Reference is made to the street lighting with dual color temperature 10. The street lighting with dual color temperature 10 comprises a luminaire body 10', a first light source module 111, a second light source module 121, a controller 40, a light sensing module 50, a weather sensing module 60, and a communication module 70, wherein the first light source module 111 is arranged in the luminaire body 10' and has a first color temperature, the second light source module 121 is arranged in the luminaire body 10' and has a second color temperature, and the second color temperature is higher than the first color temperature, wherein the controller 40 is electrically connected to the first light source module 111 and the second light source module 121 and switches the light source output status of the first light source module 111 and the second light source module 121 according to a control condition.where, by switching the control condition to activate the first light source module 111, the street light with double color temperature 10 is used as the first light, and by switching the control condition to activate the second light source module 121, the street light with double color temperature is used as the second light, and the first and second color temperatures are set. The controller 40 is a programmable logic controller (PLC), a microcontroller, or an edge computing module. The control condition can include a schedule, environmental sensing data, user-defined commands, remote control signals, or a combination thereof. The environmental sensing data is either ambient light sensing data or weather sensing data.wherein the controller 40 controls the first light source module 111 and the second light source module 121 of the street lighting with double color temperature 10 according to the ambient light detection data or weather detection data.

[0029] In other embodiments, the street lighting with dual color temperature 10 can be connected to an external light sensing module and a weather sensing module. The light sensing module detects ambient brightness in the predefined area of ​​the street lighting with dual color temperature 10 and generates corresponding ambient light sensing data. The weather sensing module detects changes in thick fog, precipitation, or humidity in the predefined area of ​​the street lighting with dual color temperature 10 and generates corresponding weather sensing data. This allows the street lighting with dual color temperature 10 to provide environmental data via an external light sensing module or an external weather sensing module, enabling the controller 40 to assess the environmental conditions and control the first light source module 111 and the second light source module 121 accordingly.The communication module 70 is electrically connected to the controller 40, which transmits data via the communication module 70 to an external remote management platform. The controller 40 either receives a remote control signal or uploads information on the status of the dual-color-temperature street light 10, including at least the first and second color temperatures. Bidirectional communication exists between the dual-color-temperature street light 10 and the remote management platform. The dual-color-temperature street light 10 can actively report its current status back to the remote management platform, while the remote management platform can remotely monitor and control the dual-color-temperature street light 10.Furthermore, the streetlights with dual color temperature can send back 10 fault signals, allowing the remote management platform to actively detect streetlight failures and immediately issue maintenance orders. Compared to conventional streetlights that rely on manual inspections or reports from citizens, this can significantly reduce repair time and increase efficiency.

[0030] Therefore, the dual color temperature street lighting system 1 and the dual color temperature street lighting 10 of the present invention can dynamically adjust the lighting modes according to the environmental status or usage situation by arranging light sources with corresponding color temperatures and by intelligent control mechanisms. This not only increases driving safety and public safety, but also enables integration into urban smart lighting systems for remote monitoring and energy-saving management.

[0031] In summary, the dual-color-temperature street lighting system and the dual-color-temperature street lighting system according to the invention employ luminaires with appropriate color temperatures for different road areas based on factors such as the visual properties of the human eye, the lighting characteristics of the light sources, and traffic behavior, thus taking into account both warning effect and visual comfort. In a high-risk warning area A, white luminaires with a high color temperature are used, which effectively increase the visual warning effect and enhance the attention of drivers and pedestrians. In a normal area B with stable traffic flow, yellowish luminaires with a low color temperature are used, which provide comfort and do not create any additional hazards.Furthermore, the street lighting system according to the invention, with its dual color temperature, can improve lighting efficiency and the timeliness of management by adjusting the lighting conditions according to ambient brightness and weather changes. Overall, the present invention not only enables an effective reduction in the road accident rate, an increase in pedestrian visibility and driver reaction time, but also supports energy-saving management and the intelligent development of street lighting, thus realizing the concept of human-centered and intelligent traffic design.

[0032] The foregoing description presents only preferred embodiments of the invention and is not intended to limit the scope of the claims. All equivalent changes and modifications that can be made by a person skilled in the art in this field according to the description and drawings of the invention are within the scope of protection of the present invention. Reference symbol list 1 street lighting system with dual color temperature A, A1, A2 Warning area B Normal range 10 streetlights with double color temperature 10' Lamp body 11 first light 111 first light source module 12 second light 121 second light source module 40 Control 70 Communication module

Claims

[1] A street lighting system with dual color temperature, comprising: several first lights arranged in a warning zone of a road, each equipped internally with a first light source module with a first color temperature; and several second lights, arranged in a normal area of ​​the street and each equipped inside with a second light source module with a second color temperature; wherein the normal area and the warning area are adjacent and arranged in such a way that vehicles, in relation to the direction of travel of vehicles on the road, move from the normal area towards the warning area; where the first color temperature is higher than the second color temperature. [2] Street lighting system with double color temperature according to claim 1, wherein the first color temperature is in the range of 4500 K to 6500 K. [3] Street lighting system with dual color temperature according to claim 1, wherein the second color temperature is in the range of 2700 K to 3500 K. [4] Street lighting with double color temperature, comprising: a light fixture; a first light source module that is arranged in the luminaire body and has a first color temperature; a second light source module arranged in the luminaire body and having a second color temperature, the second color temperature being higher than the first color temperature; and a controller that is electrically connected to the first light source module and the second light source module and switches the light source output status of the first light source module and the second light source module according to a control condition, thereby causing a switch between the first color temperature and the second color temperature; where, by switching the control condition to activate the first light source module, the street lighting with double the color temperature is used as the first light, and by switching the control condition to activate the second light source module, the street lighting with double the color temperature is used as the second light. [5] Street lighting with dual color temperature according to claim 4, wherein the control condition comprises a schedule, environmental sensing data, user-defined commands, remote control signals or a combination thereof. [6] Street lighting with dual color temperature according to claim 5, wherein the ambient sensing data are either ambient light sensing data or weather sensing data, wherein the control according to the ambient light sensing data or weather sensing data controls the first light source module and the second light source module of the street lighting with dual color temperature. [7] Dual color temperature street lighting according to claim 4, wherein the dual color temperature street lighting system further comprises a communication module electrically connected to the controller, the controller transmitting data via the communication module to an external remote management platform, so that the controller either receives a remote control signal or uploads the street lighting status information of the dual color temperature street lighting, the street lighting status information comprising at least the first color temperature and the second color temperature. [8] Street lighting with double color temperature according to claim 4, wherein the control is a programmable logic controller, a microcontroller or an edge computing module.

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