High directivity bicolor temperature adjustable high brightness ring light source

Abstract

The application provides a high-directivity bicolor temperature adjustable high-brightness ring light source, comprising a shell, a circuit board, lamp beads, a base and a light source wire for connecting an external power supply and a control component; the shell and the base are detachably fixed to form a ring-shaped accommodating space; the shell comprises a shell body and a diffusion plate, the shell body is detachably fixed to the base, and the diffusion plate is fixedly arranged at one end of the shell body away from the base; the circuit board is fixedly connected to the surface of the base, and the circuit board is located inside the ring-shaped accommodating space; the lamp beads are multiple and arranged on the side of the circuit board facing the diffusion plate; the light source wire passes through the base and is electrically connected to the circuit board. The application solves the problem of insufficient brightness in high-speed flying scene caused by power limitation of traditional plug-in lamp beads, and realizes high-brightness flash lighting effect.

Description

Technical Field

[0001] This application relates to the field of machine vision inspection, specifically to a highly directional, dual-color-temperature adjustable, high-brightness ring light source. Background Technology

[0002] In the field of machine vision inspection, ring light sources are commonly used illumination devices. Their principle is to provide uniform and highly directional light through a ring of arranged LEDs, thereby enhancing the contrast and clarity of image acquisition. Conventional ring light sources typically employ a plug-in LED design, utilizing the high directional characteristics of these LEDs to concentrate the light spot. This type of light source is mainly used in industrial vision inspection, automated measurement, and high-speed aerial photography (i.e., photographing fast-moving objects), where the brightness and color temperature consistency of the light source are crucial to inspection accuracy.

[0003] However, traditional plug-in LEDs are difficult to achieve high power output, resulting in insufficient light source brightness in high-brightness demand scenarios such as high-speed aerial photography. Utility Model Content

[0004] In view of the aforementioned problems, this application is made to provide a highly directional, dual-color-temperature adjustable, high-brightness ring light source that overcomes or at least partially solves the aforementioned problems, comprising: Housing, circuit board, LED chips, base, and light source wire for connecting external power supply and control components; The outer shell and the base are detachably fixed together to form an annular receiving space; The outer casing includes a housing and a diffuser plate. The housing is detachably fixed to the base, and the diffuser plate is fixedly disposed at the end of the housing away from the base. The circuit board is fixedly connected to the surface of the base, and the circuit board is located inside the annular receiving space; The lamp beads are multiple and are respectively disposed on the side of the circuit board facing the diffuser plate; The light source line passes through the base and is electrically connected to the circuit board.

[0005] Preferably, the housing includes a first annular plate and a second annular plate, which are coaxially disposed on the surface of the base; The diffuser plate is disposed on the side of the first annular plate and the second annular plate away from the base.

[0006] Preferably, the inner wall of the diffuser plate is fixedly connected to the side of the second annular plate away from the base; An installation ring is fixedly fitted onto the outer wall of the diffuser plate, and the installation ring is fixedly connected to the side of the first annular plate away from the base.

[0007] Preferably, the base is hollow inside, the outer wall of the base is detachably fixed to the first annular plate, and the inner wall of the base is detachably fixed to the second annular plate.

[0008] Preferably, the LED bead is a dual-color temperature LED bead, including a first color temperature LED and a second color temperature LED, wherein the color temperature of the first color temperature LED is 3000K and the color temperature of the second color temperature LED is 7000K.

[0009] Preferably, the lamp bead is a high-power 30-degree directional LED with a 3535 package.

[0010] Preferably, the LED bead is produced using a chip cover film process.

[0011] Preferably, the circuit board includes a dual-channel driving circuit, which is used to individually adjust the input current of the first color temperature LED and the second color temperature LED.

[0012] Preferably, the light source line supports the transmission of high-brightness strobe control signals.

[0013] Preferably, the high-power 30-degree directional LED in the 3535 package supports high-current driving.

[0014] This application has the following advantages: In the embodiments of this application, in response to the deficiency of insufficient light source brightness in high-speed aerial photography scenarios in the prior art, this application provides a high-directivity, dual-color-temperature adjustable, high-brightness ring light source, including a housing, a circuit board, LED beads, a base, and a light source line for connecting an external power supply and control components; the housing and the base are detachably fixed to form a ring-shaped receiving space; the housing includes a shell and a diffuser plate, the shell and the base are detachably fixed, and the diffuser plate is fixedly disposed at the end of the shell away from the base; the circuit board is fixedly connected to the surface of the base, and the circuit board is located inside the ring-shaped receiving space; there are multiple LED beads, each disposed on the side of the circuit board facing the diffuser plate; the light source line passes through the base and is electrically connected to the circuit board. By combining high-power 30-degree dual-color-temperature LED beads in a 3535 package with a dual-channel drive circuit that supports high-current instantaneous input, the problem of insufficient brightness in high-speed shooting scenarios caused by the power limitation of traditional plug-in LED beads is solved, achieving a high-brightness flickering lighting effect. At the same time, by utilizing its 3000K and 7000K dual-color-temperature LED design, chip cover film process, and independent dual-channel dimming function, the output color temperature is precisely adjustable, thereby ensuring the consistency of lighting throughout the entire visual system. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a highly directional, dual-color-temperature adjustable, high-brightness ring light source provided in an embodiment of this application; Figure 2 Figure 1 This is an exploded view of a highly directional, dual-color-temperature adjustable, high-brightness ring light source provided in an embodiment of this application; The reference numerals in the accompanying drawings are as follows: 100. Outer shell; 110. Housing; 111. First annular plate; 112. Second annular plate; 120. Diffuser plate; 130. Mounting ring; 200. Circuit board; 300. LED bead; 400. Base; 500. Light source wire. Detailed Implementation

[0017] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] The inventors discovered through analysis of existing technologies that traditional ring light sources are insufficient in brightness during high-speed aerial photography, and that the color temperature is inconsistent when used in combination with other types of light sources.

[0019] Reference Figure 1-2 This application illustrates a highly directional, dual-color-temperature adjustable, high-brightness ring light source according to an embodiment of the present application, including a housing 100, a circuit board 200, an LED bead 300, a base 400, and a light source line 500 for connecting an external power supply and control components. The outer shell 100 and the base 400 are detachably fixed to form an annular receiving space; The outer casing 100 includes a casing 110 and a diffuser plate 120. The casing 110 is detachably fixed to the base 400, and the diffuser plate 120 is fixedly disposed at the end of the casing 110 away from the base 400. The circuit board 200 is fixedly connected to the surface of the base 400, and the circuit board 200 is located inside the annular receiving space; There are multiple LED beads 300, which are respectively disposed on the side of the circuit board 200 facing the diffuser plate 120; The light source line 500 passes through the base 400 and is electrically connected to the circuit board 200.

[0020] In the embodiments of this application, in response to the deficiency of insufficient light source brightness in high-speed aerial photography scenarios in the prior art, this application provides a high-directivity, dual-color-temperature adjustable, high-brightness ring light source, including a housing 100, a circuit board 200, LED beads 300, a base 400, and a light source line 500 for connecting an external power supply and control components; the housing 100 and the base 400 are detachably fixed to form a ring-shaped receiving space; the housing 100 includes a shell 110 and a diffuser plate 120, the shell 110 is detachably fixed to the base 400, and the diffuser plate 120 is fixedly disposed at the end of the shell 110 away from the base 400; the circuit board 200 is fixedly connected to the surface of the base 400, and the circuit board 200 is located inside the ring-shaped receiving space; there are multiple LED beads 300, which are respectively disposed on the side of the circuit board 200 facing the diffuser plate 120; the light source line 500 passes through the base 400 and is electrically connected to the circuit board 200. By using high-power LED beads 300, the problem of insufficient brightness in high-speed shooting scenes caused by the power limitation of traditional plug-in LED beads 300 is solved, and a high-brightness flickering lighting effect is achieved.

[0021] The following will further describe a highly directional, dual-color-temperature adjustable, high-brightness ring light source in this exemplary embodiment.

[0022] In one embodiment of this application, the housing 110 includes a first annular plate 111 and a second annular plate 112, which are coaxially disposed on the surface of the base 400. The diffuser plate 120 is disposed on the side of the first annular plate 111 and the second annular plate 112 away from the base 400.

[0023] It should be noted that the first annular plate 111 and the second annular plate 112 together constitute the lateral support structure of the light source. This coaxial double annular plate structure not only enhances the overall mechanical strength of the housing 100, but more importantly, it defines a regular annular optical path channel between the two annular plates, so that the light emitted from the lamp beads 300 on the circuit board 200 can be effectively guided and constrained, thereby enhancing the high directivity characteristics of the light source.

[0024] In one specific implementation, the first annular plate 111 forms the outer ring outline of the annular light source, and the second annular plate 112 forms the inner ring outline. The annular area between the two is directly opposite the layout area of ​​the lamp beads 300 on the circuit board 200, forming a vertically upward light-emitting window.

[0025] In one embodiment of this application, the inner wall of the diffuser plate 120 is fixedly connected to the side of the second annular plate 112 away from the base 400; An installation ring 130 is fixedly sleeved on the outer wall of the diffuser plate 120, and the installation ring 130 is fixedly connected to the side of the first annular plate 111 away from the base 400.

[0026] It should be noted that the mounting ring 130 fixes the diffuser plate 120 to the top of the frame formed by the first annular plate 111 and the second annular plate 112, while ensuring that there is a relatively fixed distance between the diffuser plate 120 and the lamp beads 300 below, which is crucial for obtaining a stable and uniform diffusion effect.

[0027] As an example, the mounting ring 130 and the diffuser plate 120 can be fixedly connected by means of interference fit, bonding or ultrasonic welding. The mounting ring 130 and the first annular plate 111 can be detachably fixed by means of screws, clips or screwing, which facilitates subsequent maintenance of the internal LED beads 300 or circuit board 200.

[0028] In one specific implementation, the inner edge of the diffuser plate 120 can be designed with a downwardly extending retaining edge, which is fixed to the inner wall of the upper end of the second annular plate 112 by snapping or bonding, thereby achieving the positioning of the center of the diffuser plate 120. The outer ring is pressed and fixed to the first annular plate 111 by the mounting ring 130, forming a stable double fixing structure.

[0029] In one embodiment of this application, the base 400 is hollow inside, the outer wall of the base 400 is detachably fixed to the first annular plate 111, and the inner wall of the base 400 is detachably fixed to the second annular plate 112.

[0030] It should be noted that the hollow structure inside the base 400 serves two purposes: firstly, to reduce overall weight and save materials; and secondly, to facilitate the installation of the ring light source in the machine vision system, allowing camera lenses or other detection components to pass through its hollow portion. The base 400 is simultaneously connected to the first ring plate 111 and the second ring plate 112, forming a robust "base 400-double ring plate" main support frame, ensuring the stability of the overall structure.

[0031] As an example, the outer wall of the base 400 may be provided with external threads or slots to cooperate with the internal threads or snap-fit ​​structure at the bottom of the first annular plate 111; the inner wall of the base 400 may be provided with internal threads or positioning pins to cooperate with the external threads or positioning holes at the bottom of the second annular plate 112.

[0032] In one embodiment of this application, the lamp bead 300 is a dual-color temperature LED lamp bead 300, including a first color temperature LED and a second color temperature LED, wherein the color temperature of the first color temperature LED is 3000K and the color temperature of the second color temperature LED is 7000K.

[0033] It should be noted that the use of LEDs with significantly different color temperatures of 3000K and 7000K provides a wide reference range for color temperature mixing and adjustment. By independently controlling the brightness (current) of these two LEDs, continuous and linear color temperature adjustment can be performed between 3000K and 7000K. This allows for precise matching of the color temperature of other auxiliary light sources in the system, solving the core problem of inconsistent color temperatures when multiple light sources are used in combination.

[0034] As an example, the first color temperature LEDs and the second color temperature LEDs can be arranged alternately, grouped, or concentrated in different areas of the circuit board 200 in a specific proportion.

[0035] In one specific implementation, multiple 3000K and 7000K LED chips are packaged in pairs within LED beads 300 and uniformly soldered onto a ring-shaped circuit board 200. An external controller can independently adjust the current of the two LEDs by sending commands to the drive circuit on the circuit board 200 through the light source line 500.

[0036] In one embodiment of this application, the lamp bead 300 is a high-power 30-degree directional LED with a 3535 package.

[0037] It should be noted that the 3535 package refers to the LED chip package having an external size of 3.5mm x 3.5mm. This package size is beneficial for heat dissipation and carrying a larger drive current, thereby achieving high power output. The 30-degree directivity refers to the LED controlling its emission angle within a conical range of approximately 30 degrees through a built-in primary optical lens. This narrow beam angle characteristic is the key to achieving "high directivity" in this application, making the light more concentrated and the light intensity higher, which is very suitable for machine vision scenarios that require highlighting surface features of objects or long-distance illumination. Such LEDs are typically packaged on ceramic substrates, which have good thermal conductivity.

[0038] In one specific implementation, a 30-degree LED with a power of 1W or higher in a 3535 package is used, whose central luminous intensity far exceeds that of traditional plug-in LEDs. Multiple such LEDs are densely arranged on a ring circuit board 200, and when working together, they can form a ring-shaped illumination spot with extremely high brightness and clear boundaries on the surface of the object being inspected.

[0039] In one embodiment of this application, the LED bead 300 is manufactured using a chip cover film process.

[0040] It should be noted that the chip capping process involves covering the surface of the phosphor with a high-transmittance protective film during LED chip packaging. The phosphor is used to achieve a specific color temperature. This process effectively isolates the phosphor from external environmental factors (such as oxygen, moisture, and contaminants), significantly mitigating phosphor decay and color drift. This is crucial for ensuring the stability and consistency of the output color temperature of a dual-color-temperature LED throughout its entire lifespan, and is the foundation for achieving precise and stable color temperature adjustment. As an example, the protective film material can be silicone, glass, or a special polymer material.

[0041] In one embodiment of this application, the circuit board 200 includes a dual-channel driving circuit, which is used to individually adjust the input current of the first color temperature LED and the second color temperature LED.

[0042] It should be noted that the dual-channel drive circuit is the core control unit for the color temperature adjustable function. Physically, it is an area on circuit board 200 containing two independent constant current drive units. One channel is dedicated to powering and regulating the current of all 3000K LEDs, and the other channel is dedicated to powering and regulating the current of all 7000K LEDs. By changing the output current of either channel through an external control signal transmitted from the light source line 500, the luminous intensity of the two color temperature LEDs can be independently and precisely controlled, thereby achieving stepless adjustment of the final emitted light color temperature.

[0043] In one specific implementation, the user sends commands via host computer software, and the control signals are transmitted to the driver IC on the circuit board 200 through the light source line 500. After parsing the commands, the driver IC adjusts the PWM (Pulse Width Modulation) duty cycle or reference voltage of the two channels respectively, thereby linearly changing the current values ​​flowing through the 3000K LED string and the 7000K LED string.

[0044] In one embodiment of this application, the light source line supports the transmission of high-brightness strobe control signals.

[0045] It should be noted that the light source line is not a simple power transmission line, but a composite cable integrating power lines and control signal lines. It possesses sufficient bandwidth and anti-interference capabilities, enabling it to transmit high-frequency strobe control pulse signals from the external controller to the drive circuit on the circuit board. The high-brightness strobe refers to the light source being triggered to its maximum brightness within an extremely short time (typically microseconds or milliseconds) and then quickly extinguished after shooting. This working mode is crucial for "high-speed aerial photography" applications, as it effectively "freezes" images of fast-moving objects and reduces motion blur.

[0046] In one specific implementation, when the camera of the vision system sends an exposure trigger signal, the external controller sends a high-level strobe signal synchronized with the ring light source through the signal line in the light source line. After receiving this signal, the drive circuit immediately increases the LED drive current to the maximum value to achieve instantaneous high-brightness illumination.

[0047] In one embodiment of this application, the high-power 30-degree directional LED in the 3535 package supports high-current driving.

[0048] It should be noted that, compared with traditional low-power plug-in LEDs, the 3535 packaged LED selected in this application has lower thermal resistance and better current handling capability, allowing the driving circuit to apply a pulse current far exceeding its rated average current for a short period of time, thereby generating an instantaneous luminous flux several times that of the normal operating state, meeting the requirements for instantaneous extremely high illuminance during high-speed aerial photography.

[0049] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0050] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0051] The above provides a detailed description of a highly directional, dual-color-temperature adjustable, high-brightness ring light source provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A highly directional, dual-color-temperature adjustable, high-brightness ring light source, characterized in that: Includes housing, circuit board, LED beads, base, and light source wire for connecting external power supply and control components; The outer shell and the base are detachably fixed together to form an annular receiving space; The outer casing includes a housing and a diffuser plate. The housing is detachably fixed to the base, and the diffuser plate is fixedly disposed at the end of the housing away from the base. The circuit board is fixedly connected to the surface of the base, and the circuit board is located inside the annular receiving space; There are multiple LED beads, each disposed on the side of the circuit board facing the diffuser plate; The light source line passes through the base and is electrically connected to the circuit board.

2. The high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 1, characterized in that: The housing includes a first annular plate and a second annular plate, which are coaxially disposed on the surface of the base. The diffuser plate is disposed on the side of the first annular plate and the second annular plate away from the base.

3. The highly directional, dual-color-temperature adjustable, high-brightness ring light source according to claim 2, characterized in that: The inner wall of the diffuser plate is fixedly connected to the side of the second annular plate away from the base; An installation ring is fixedly fitted onto the outer wall of the diffuser plate, and the installation ring is fixedly connected to the side of the first annular plate away from the base.

4. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 2, characterized in that: The base is hollow inside, the outer wall of the base is detachably fixed to the first annular plate, and the inner wall of the base is detachably fixed to the second annular plate.

5. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 1, characterized in that: The LED bead is a dual-color temperature LED bead, including a first color temperature LED and a second color temperature LED. The color temperature of the first color temperature LED is 3000K, and the color temperature of the second color temperature LED is 7000K.

6. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 1, characterized in that: The LEDs are high-power 30-degree directional LEDs in a 3535 package.

7. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 1, characterized in that: The LED beads are produced using a chip cover film process.

8. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 5, characterized in that: The circuit board includes a dual-channel driving circuit, which is used to individually adjust the input current of the first color temperature LED and the second color temperature LED.

9. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 1, characterized in that: The light source line supports the transmission of high-brightness strobe control signals.

10. A high-directivity, dual-color-temperature adjustable, high-brightness ring light source according to claim 6, characterized in that: The high-power 30-degree directional LED in the 3535 package supports high-current driving.

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