TWI490446B - Lighting module detecting device and lighting module detecting method - Google Patents

Description

Light-emitting module detecting device and light-emitting module detecting method

The present invention relates to a light-emitting module detecting device and a light-emitting module detecting method, and in particular to a light-emitting module detecting device and a light-emitting module detecting method capable of accurately calculating a deviation between a light-emitting element and a lens center position in a light-emitting module .

Before becoming a lighting product, high-power LED lighting components are generally optically designed to adjust the light source required for LED emission. The primary optical design refers to adjusting the range, distribution of light intensity, luminous flux, light intensity distribution, and color temperature of the LED itself with a primary lens when the LED chip is packaged into an LED photoelectric component. After an optical design of the LED optoelectronic components, the illumination angle is about 120 degrees. Since the LED optoelectronic components are point light sources, the LED optoelectronic components are often arranged in an array to form a light-emitting module, thereby enabling the surface light source to be used for devices such as backlight modules.

Taking the light-emitting module as a backlight as an example, each of the LED optoelectronic components can be disposed on the elongated substrate in a row, and then the similar substrates are arranged side by side to form an LED array. The LED photoelectric component is a point light source with an illumination angle of about 120 degrees. Although the function of the surface light source can be achieved by array arrangement, the problem of uneven light output makes the surface light source not effective. Therefore, the general LED optoelectronic components in the application (whether or not the application of the backlight module) must be subjected to secondary optical design to further adjust the light to the desired source. In the case of the backlight module, a plurality of secondary optical lenses can be further disposed on the elongated substrate, and the LED photoelectric components are respectively located at the center positions of the secondary optical lenses. With each secondary optical lens, the light emitted by each LED optoelectronic component can be used to form a surface light source.

Referring to FIG. 1A and FIG. 1B, FIG. 1A is a schematic diagram of a lighting module 1 of the prior art, and FIG. 1B is a partial side view of the lighting module 1 of FIG. As shown in FIG. 1A, the light-emitting module 1 can have a substrate 10 and a column of light-emitting sheets disposed on the substrate 10. Yuan 12. In addition, as shown in FIG. 1B, each of the light emitting units 12 includes a light emitting element 120 and a lens 122, both of which are disposed on the substrate 10, and the light emitting element 120 is located at a center position of the lens 122. The light emitted by the light-emitting element 120 is subjected to secondary optical processing by the lens 122 to produce optical characteristics desired by the user in space.

In the above secondary optical design, if the LED photoelectric component deviates from the center position of the secondary optical lens due to an artificial or systematic error, the light scattered by the secondary optical lens affects the uniformity of the surface light source. Therefore, the illumination module must be subjected to secondary optical detection. In the case of the backlight module, it is detected whether the LED photoelectric components are at the center position of the corresponding secondary optical lens. In the prior art, the detection system first energizes each of the LED optoelectronic components to emit light. When the light is scattered outside the illumination module through the secondary optical lens, the intensity of the light in the space is collected through the diffusion plate for analysis. And the position of the LED optoelectronic component and the secondary optical lens is reversed, thereby knowing whether the LED optoelectronic component is located at the center of the secondary optical lens.

As described above, in the secondary optical inspection of the prior art, the electrodes must be connected first to illuminate the LED optoelectronic components, and then the light source emitted therefrom is detected. When the LED photoelectric components are disposed on the substrate and become the light-emitting module, usually the electrodes of the LED photoelectric components are connected to a unified electrode switch through the circuit on the substrate, so all the LED photoelectric components are simultaneously illuminated. If the position of one of the LED optoelectronic components is detected by the secondary detection method of the prior art, it may be disturbed by the light source emitted by other LED optoelectronic components, resulting in a serious deviation of the detection result. In addition, even for the same specification of LED optoelectronic components, the emitted light source may have individual differences. If the light source emitted by the LED photoelectric component is detected, it will also be interfered by the deviation of different light sources, and must be corrected separately. Increase the complexity of detection.

Accordingly, it is an object of the present invention to provide an illumination module detecting apparatus that accurately calculates a deviation of a position of a light-emitting element from a center of a lens without transmitting a light source emitted from the light-emitting element, to solve the problems of the prior art.

According to a specific embodiment, the illumination module detecting device of the present invention is configured to detect whether a light emitting component including the light emitting module is a center position of the lens, and includes a light source, a first imaging unit, and a second imaging unit. The light source of the illumination module detecting device emits a light source from outside the lens to illuminate the lens and the light emitting component of the light emitting module, and the first camera unit can be from the first side of the lens The first image is captured from the lens and the light-emitting element, and the second image capturing unit can capture the second image from the second side of the lens to the lens and the light-emitting element, wherein the first lateral direction and the second lateral direction have The angle at which the angle is not zero. The deviation between the light-emitting element and the center position of the lens can be calculated according to the angle between the first image and the second image taken by the first image capturing unit and the second image capturing unit and the first lateral direction and the second lateral direction.

Another aspect of the present invention is to provide a method for detecting a light-emitting module that solves the problems of the prior art.

According to another embodiment, the illumination module detection method of the present invention can be used to detect whether the illumination element of the illumination module is located at a central position of the lens. The method for detecting a light module comprises the steps of: illuminating a lens and a light emitting element from outside the lens; capturing a first image from the first side of the lens to the lens and the light emitting element; and, from the second side of the lens to the lens and The illuminating element captures the second image. There is a non-zero angle between the first lateral direction and the second lateral direction. According to the angle between the first image and the second image obtained by the illumination module detecting method and the first lateral direction and the second lateral direction, the deviation between the light-emitting element and the center position of the lens can be calculated.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

1‧‧‧Lighting module

10‧‧‧Substrate

12‧‧‧Lighting unit

120‧‧‧Lighting elements

122‧‧‧ lens

2‧‧‧Lighting module detection device

20‧‧‧Light source

22‧‧‧First camera unit

24‧‧‧Second camera unit

26‧‧‧ Processor

260‧‧‧Image Processing Program

D1‧‧‧ first lateral

D2‧‧‧ second lateral direction

1220‧‧‧ central location

L‧‧‧Absolute deviation distance

L1‧‧‧first projection distance

L2‧‧‧second projection distance

A‧‧‧first deviation distance

B‧‧‧second deviation distance

Θ‧‧‧ angle

S30~S34, S340~S344‧‧‧ Process steps

FIG. 1A is a schematic diagram showing a prior art lighting module.

FIG. 1B is a partial side view showing the light emitting module of FIG.

2 is a schematic diagram of a light module detecting device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram showing the illumination module detecting device of FIG. 2 capturing the light-emitting element and the lens.

FIG. 4 is a flow chart showing the steps of a method for detecting a light-emitting module according to an embodiment of the present invention.

FIG. 5 is a flow chart showing the further steps of the method for detecting the illumination module of FIG.

Referring to FIG. 2 and FIG. 3 , FIG. 2 is a schematic diagram of a light-emitting module detecting device 2 according to an embodiment of the present invention, and FIG. 3 is a second embodiment of the light-emitting module detecting device 2 . A detailed schematic diagram of the light-emitting element 120 and the lens 122 is taken. As shown in FIG. 2, the light-emitting module detecting device 2 can be used to detect the light-emitting module 1. In the specific embodiment, the light-emitting module 1 can be referred to FIG. 1A and FIG. The illuminating module detecting device 2 can be used to detect whether the illuminating element 120 of the illuminating module 1 is located at the center of the corresponding lens 122. The structure and function of each unit of the illuminating module detecting device 2 will be described in detail below.

In the specific embodiment, the illumination module detecting device 2 includes a light source 20, a first imaging unit 22, and a second imaging unit 24. The light source 20 can provide light to the light emitting unit 12 of the light emitting module 1 to illuminate the light emitting element 120 and the lens 122 of the light emitting unit 12. The first imaging unit 22 and the second imaging unit 24 may be respectively disposed at different positions on the side of the lens 122, and may image the light-emitting element 120 and the lens 122 from the first side D1 and the second side D2, respectively. Please note that in practice, the position of the light source 20 and the direction of the light provided are not limited to the specific embodiment, and the light provided by the light source can be reflected by the light-emitting element 12, and the reflected light can be first. The imaging unit 22 and the second imaging unit 24 receive and form an image as a principle. In other words, the light source 20 projects light to the light emitting unit 12, and the light emitting element 120 and the lens 122 of the light emitting unit 12 can reflect the light, and the first image capturing unit 22 and the second image capturing unit 24 can receive the reflected light, thereby extracting light. The first image and the second image of the component 120 and the lens 122 in different lateral directions.

As shown in FIG. 2, the first imaging unit 22 and the second imaging unit 24 of the illumination module detecting device 2 are respectively located at different positions, and the light-emitting unit 12 is imaged from the first side D1 and the second side D2. , wherein the first lateral direction D1 and the second lateral direction D2 have an angle of not zero. In this embodiment, the first imaging unit 22 and the second imaging unit 24 face the light-emitting unit 12 from the first side D1 and the second side D2, respectively, in other words, reflected by the light-emitting element 120 and the lens 122. The light can be regarded as entering the first camera unit 22 and the second camera unit 24 vertically. Therefore, the first image captured by the first imaging unit 22 and the included angle can be used to know the first deviation distance between the center position of the light-emitting element 120 and the lens 122 on the second lateral direction D2, and relatively, by the second imaging. The second image captured by the unit 22 and the included angle can be used to know the second deviation distance between the center position of the light-emitting element 120 and the lens 122 on the first lateral direction D1.

As shown in FIG. 3, from the outside of the light-emitting unit 12 toward the light-emitting unit 12, the position of the light-emitting element 120 on the substrate 10 is offset from the center position 1220 of the lens 122 with an absolute deviation distance L therebetween. The deviation between the light-emitting element 120 and the central position 1220 can project a second projection distance L2 in the second image, which extends in the vertical direction of the second lateral direction D2, and according to the second projection distance L2, the angle θ And the formula of a = L2 / cos (90 - θ) can calculate the first deviation distance a along the first lateral direction D1. Similarly, a first projection distance L1 can be projected in the first image, which extends in the vertical direction of the first lateral direction D1, and according to the first projection distance L1, the included angle θ, and b=L1/cos (90-θ) The formula can calculate the second deviation distance b along the second lateral direction D2. After obtaining the first deviation distance L1 and the second deviation distance L2, the angle θ and L ² = a ² + b ² -2ab can be further increased. The formula of cos(180-θ) calculates the absolute deviation distance L. Therefore, the actual deviation and the absolute deviation distance between the central position 1220 of the light-emitting element 120 and the lens 122 can be calculated from the first image, the second image, and the angle θ between the two sides.

The step of obtaining the actual deviation and the absolute deviation distance between the light-emitting element 120 and the center position 1220 of the lens 122 through the first image, the second image, and the angle θ can be uniformly processed by a processor. Referring to FIG. 2, the illuminating module detecting device 2 may further include a processor 26 connected to the first camera unit 22 and the second camera unit 24 for receiving the first image and the second image captured by the two. The image can also be used to control the first camera unit 22 and the second camera unit 24. In addition, the processor 26 can further connect the light source 20 to control the light source 20 to project light to the light emitting unit 12. In practice, the processor 26 can be, but is not limited to, a host computer for controlling the units of the lighting module detecting device 2. The processor 26 includes an image processing program 260 that can analyze the first image and the second image to calculate an actual deviation between the central position 1220 of the light-emitting element 120 and the lens 122.

After receiving the first image and the second image, the image processing program 260 can perform image processing on the first image and the second image respectively to distinguish the light-emitting component 120 and the lens 122 in the image, and measure the same. The amount of shift of the light-emitting element 120 from the center position of the lens 122 in each image. In addition, the image processing program 260 can also perform the above calculation of each deviation distance to obtain an actual deviation and an absolute deviation distance between the light-emitting element 120 and the lens 122 in space.

In this embodiment, the first camera unit 22 and the second camera unit 24 can be fixed at the position shown in FIG. 2, and when one of the light-emitting units 12 is detected, the substrate 10 can be moved, so that the next light-emitting unit 12 is caused. Enter the detection location. In this embodiment, the illumination module detecting device 2 can further include a transmission mechanism, which can be used for placing or connecting the illumination module 1 to enable The light module 1 can be transferred to the positioning so that the light-emitting units 12 are sequentially moved to the detection position for the first imaging unit 22 and the second imaging unit 24 to capture the first image and the second image.

As described above, the illumination module detecting device 2 can capture the image of the light-emitting component and the lens through the external light source and the image capturing unit at different positions on the side of the lens to determine whether the light-emitting component is located at the center of the lens, and the light-emitting component is not located at the center of the lens. The position can also calculate the amount of deviation of the illuminating element from the center position for correction. Therefore, the illumination module detecting device of the present invention does not need to illuminate the light-emitting elements during detection, and can avoid detection errors caused by individual differences or interference of other light-emitting elements. Please note that the light-emitting elements of the above specific embodiments may be light-emitting diodes, but not limited thereto in practice, but various light-emitting elements suitable for secondary optical design can be detected by the light-emitting module of the present invention. The device performs the test.

Referring to FIG. 4, FIG. 4 is a flow chart showing the steps of a method for detecting a light-emitting module according to an embodiment of the present invention. The illumination module detection method of FIG. 4 can detect the illumination module 1 through the illumination module detection device 2 of FIG. 2. Therefore, the detection method will be described below by the illumination module detection device 2. As shown in FIG. 4, the method for detecting a light-emitting module includes the following steps: in step S30, the lens 122 and the light-emitting element 120 are irradiated with light from outside the lens 122; and in step S32, respectively, from the first side of the lens 122 to the D1 and the second In the lateral direction D2, the first image and the second image are captured by the lens 122 and the light-emitting element 120, wherein the first lateral direction D1 and the second lateral direction D2 have an angle θ that is not zero. The above step S30 can be performed by the light source 20 of the light-emitting module detecting device 2 of FIG. 2, that is, the light source 20 irradiates the lens 122 and the light-emitting element 120 with light. Similarly, step S32 can also be performed by the first imaging unit 22 and the second imaging unit 24, that is, the first imaging unit 22 and the second imaging unit 24 respectively acquire the first image and the second image.

In the embodiment, the illuminating module detecting method may further include the steps of receiving and processing the captured first image and the second image, as shown in step S34, and step S34 is also permeable to the illuminating module detecting device. The processor 26 of 2 performs. After the processing in step S34, it is known whether or not the light-emitting element 120 is located at the center position 1220 of the lens 122 or the amount of deviation from the center position 1220. Please refer to FIG. 5 , which is a flow chart showing further steps of the method for detecting the illumination module of FIG. 4 . As shown in FIG. 5, the illumination module detection method further includes steps S340, S342, and S344, which are the disassembly steps of step S34 of FIG.

Steps S340 to S344 of FIG. 5 are detailed as follows: In step S340, according to the second The image and the angle θ determine the first deviation distance a of the central position 1220 of the light-emitting element 120 and the lens 122 in the first lateral direction D1. In step S342, the light-emitting element 120 and the central position 1220 of the lens 122 are determined according to the first image and the angle θ. a second deviation distance b on the second lateral direction D2; and, in step S344, an absolute deviation between the light-emitting element 120 and the central position 1220 of the lens 122 is calculated according to the first deviation distance a, the second deviation distance b, and the included angle θ Distance L. Therefore, the illumination module detection method of the specific embodiment can calculate the actual deviation of the central position 1220 of the light-emitting element 120 from the lens 122 for subsequent correction. The above steps S340 to S344 can also be performed by the image processing program 260 of the processor 26 of the illumination module detecting device 2 shown in FIG.

In summary, the illumination module detecting device and the illumination module detecting method of the present invention use an external light source to illuminate the light emitting element and the lens, and receive the reflected light from the first side and the second side of the lens. Taking the first image and the second image of the light-emitting element and the lens. Then, based on the angle between the first image, the second image, and the first lateral direction and the second lateral direction, the actual deviation between the light-emitting element and the center position of the lens is calculated. Compared with the prior art, the device and method of the present invention can eliminate the need to illuminate the light-emitting elements during detection, and avoid detection errors caused by individual differences or interference of other light-emitting elements.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. Therefore, the scope of the patented scope of the invention should be construed as broadly construed in the

1‧‧‧Lighting module

10‧‧‧Substrate

12‧‧‧Lighting unit

2‧‧‧Lighting module detection device

20‧‧‧Light source

22‧‧‧First camera unit

24‧‧‧Second camera unit

26‧‧‧ Processor

260‧‧‧Image Processing Program

D1‧‧‧ first lateral

D2‧‧‧ second lateral direction

Claims (4)

An illumination module detecting device is configured to detect a light-emitting module including a substrate, a light-emitting component and a lens, wherein the light-emitting component and the lens are disposed on the substrate, and the light-emitting module detects the device for detecting the Whether the light-emitting element is located at a central position of the lens, the light-emitting element is not illuminated during the detecting process, and the light-emitting module detecting device comprises: a light source for emitting light from the outside of the lens to illuminate the lens and the light-emitting element; a first image capturing unit for extracting a first image from the first side of the lens to the lens and the light emitting element; and a second image capturing unit for aligning the second side of the lens The lens and the illuminating element capture a second image, the first lateral direction and the second lateral direction have an angle that is not zero; and a processor electrically connected to the first imaging unit and the first The second camera unit receives the first image and the second image, and the processor includes an image processing program for determining, according to the second image and the angle, the light emitting element and the center position on the first side a first deviation distance, determining, according to the first image and the angle, a second deviation distance between the light-emitting element and the center position on the second side, and according to the first deviation distance, the second deviation distance, and the angle An absolute deviation distance between the illuminating element and the center position is calculated. The light-emitting module detecting device according to claim 1, wherein the light-emitting element is a light-emitting diode. The illuminating module detecting device of claim 1, further comprising: a transmitting mechanism for arranging the illuminating module and transmitting the illuminating module to the positioning for the first camera unit and the first The second camera unit captures the first image and the second image. A light-emitting module detecting method for detecting a light-emitting module including a substrate, a light-emitting component and a lens, wherein the light-emitting component and the lens are disposed on the substrate, and the light-emitting module detecting method is used for detecting the light-emitting module Whether the illuminating element is located at a central position of the lens, and the illuminating element is not illuminating during the detecting process, and the illuminating module detecting method comprises the following steps: Illuminating the lens and the illuminating element from the outside of the lens; extracting a first image from the first side of the lens to the lens and the illuminating element; and from the second side of the lens to the lens and The illuminating element captures a second image, and the first lateral direction and the second lateral direction have an angle that is not zero; and the illuminating element and the center position are determined according to the second image and the included angle a first deviation distance from one side upward; determining a second deviation distance of the light emitting element from the center position on the second side direction according to the first image and the angle; and according to the first deviation distance, the second The deviation distance and the angle calculate an absolute deviation distance between the light-emitting element and the center position.