CN105306798B - Flash lamp lighting module and camera device with short-distance optical ranging function - Google Patents

Abstract

The invention discloses a flash lamp lighting module with a short-distance optical ranging function and a camera device, wherein the flash lamp lighting module with the short-distance optical ranging function comprises a circuit board, one end of the circuit board is provided with a control circuit pin, the other end of the circuit board is electrically connected with a flash lamp lighting device, the flash lamp lighting device comprises a device body, a ranging sensor function module and a plurality of flash lamps, the ranging sensor function module is arranged in the device body, the plurality of flash lamps uniformly surround the ranging sensor function module, a flash lamp light-transmitting surface and a transmitting and receiving window are arranged on the device body, the transmitting and receiving window is positioned above the ranging sensor function module, and the flash lamp light-transmitting surface is positioned above the plurality of flash lamps and is connected with the periphery of the transmitting. The flashlight module has the advantages that the flashlight module has the lighting function, can automatically focus and adjust the lighting mode of shooting according to the intensity of ambient light and the distance of a shot object, and solves the problem that the function of the traditional flashlight module is single.

Description

A flash lighting module and camera device with short-distance light ranging function

technical field

The present invention relates to the field of electronic images, in particular to a flashlight lighting module with short-distance light ranging function; .

Background technique

Along with the rapid development of multimedia technology, camera devices such as digital camera, video camera and mobile phone with camera are more and more subject to consumers in general. When using these camera devices to take pictures, sometimes because the ambient light intensity is not enough, the assistance of light is needed, that is, the commonly known flash lighting module is used. The flash lighting module can emit very strong light in a short time. Photosensitive photography accessories. It is mostly used for instant lighting in places with low light, and it is also used for partial fill light in places with bright light. It is small in size, safe to use, easy to carry, and stable in performance.

The existing flashlight lighting module basically does not have any other functions except for lighting the object to be photographed, and it does not have automatic light metering, distance measurement, and adjustment of exposure index (including the intensity of flashing light, flickering, etc.) time, or parameters such as the color temperature of the flashing light) and other functions. With the high-standard requirements of the consumer market for camera devices, the existing flash modules with simple functions can no longer adapt to the era of rapid development.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects in the prior art, to provide a distance measuring device with short-distance light that has lighting function, and can also automatically focus and adjust the shooting lighting mode according to the intensity of ambient light and the distance of the object to be photographed. Functional flash lighting mod.

Another object of the present invention is to provide an imaging device with a flash lighting module with short-distance light ranging function.

In order to achieve the above object, the technical scheme provided by the invention is as follows:

A flashlight lighting module with short-distance light ranging function, including a circuit board, one end of the circuit board is provided with a control circuit pin, the other end of the circuit board is electrically connected to a flashlight lighting device, and the flashlight The lighting device includes a device body, a distance measuring sensor functional module arranged in the device body, and several flashlights uniformly arranged around the distance measuring sensor function module. The transmitting and receiving window is located above the functional module of the distance measuring sensor, and the light-transmitting surface of the flashlight is located above the plurality of flashlights and connected to the outer periphery of the transmitting and receiving window.

Wherein, the distance measuring sensor functional module is a VL6180X module, which is composed of a proximity sensor and an ambient light sensor.

Preferably, the light-transmitting surface of the flash lamp and the emission-receiving window are integrally formed.

Preferably, the connection between the light-transmitting surface of the flash lamp and the emission-receiving window forms a "<"-shaped profile in section.

In the above technical solution, the material of the transmitting and receiving window is IR PMMA or IRPC with infrared transmission band, the transmission band is 700-1050nm, and the projection rate is over 80%.

Preferably, a CD ring pattern is arranged below the light-transmitting surface of the flash lamp, and the CD ring pattern is arranged in a right-angle zigzag fold line.

Preferably, the circuit board is a rollable flexible circuit board FPC.

In the above technical solution, the flashlights are provided with eight ring-shaped distributions around the distance measuring sensor functional module, and the light-transmitting surface of the flashlights is arranged above the eight flashlights in a ring shape.

Wherein, the light-transmitting surface of the flashlight is a light-distributing lens, which is made of transparent PC or PMMA.

In the above technical solution, the light-transmitting surface of the flashlight includes several light distribution lens units that are correspondingly arranged on the several flashlights, and the light distribution lens unit includes a concave incident surface that can transmit light from the flashlight and a total reflection side surface. and the light exit plane, the concave incident surface is located directly above the flashlight, and the light emitted by the flashlight is transmitted through the concave incident surface into the light distribution lens unit and emitted from the light exit plane through the reflection of the total reflection side.

Preferably, the total reflection side is arranged in a quincunx shape.

In the above technical solution, the light-transmitting surface of the flash lamp includes several light distribution lens units correspondingly arranged on the several flash lamps. The surface and the light-emitting plane, the sawtooth-shaped total reflection ring Fresnel surface is set around the concave incident surface and is located directly above the flashlight, and the light emitted by the flashlight passes through the sawtooth total reflection ring Fresnel surface Neel surface reflections emanate from the light exit plane.

Wherein, the concave incident surface is a concave conical surface.

In the above technical solution, the light-transmitting surface of the flashlight includes several light distribution lens units that are correspondingly arranged on the several flashlights, and the light distribution lens unit includes a concave incident surface that can transmit light from the flashlight and a total reflection side surface. , a concave total reflection conical surface and a light-emitting plane, the concave incident surface is located directly above the flashlight, and the light emitted by the flashlight is transmitted through the concave incident surface into the light distribution lens unit through the reflection of the total reflection side from the light exit It is emitted from the plane, or transmitted through the concave incident surface into the light distribution lens unit, reflected by the concave total reflection conical surface to the total reflection side, and then reflected and emitted from the light exit plane.

Wherein, the concave incident surface is a concave spherical surface.

Preferably, a ring-shaped total reflection Fresnel lens is arranged below the transmitting and receiving window, and the ring-shaped total reflection Fresnel lens is correspondingly arranged on the infrared emitting tube and the infrared receiving tube of the functional module of the distance measuring sensor .

Preferably, the material of the annular total reflection Fresnel lens is IR PMMA or IRPC with infrared transmission band, the transmission band is 700-1050nm, and the projection rate is above 80%.

Preferably, an annular refraction Fresnel lens is arranged on the transmitting and receiving window, and the annular refracting Fresnel lens is correspondingly arranged on the infrared emitting tube and the infrared receiving tube of the distance measuring sensor functional module.

Preferably, the material of the annular refracting Fresnel lens is IR PMMA or IRPC with infrared transmission band, the transmission band is 700-1050nm, and the projection rate is above 80%.

In the above technical solution, the light-transmitting surface of the flash lamp is a CD ring, and a prism film is arranged between the CD ring and the flash lamp, and the prism film is composed of several V-shaped microprisms along the radial direction. Arranged in a rotating manner.

In the above technical solution, the light-transmitting surface of the flash lamp is a CD ring pattern, and a microprism film is arranged between the CD ring pattern and the flash lamp, and the microprism film is composed of several micro-corner cube arrays.

In the above technical solution, the shape of the device body is elliptical, and the shapes of the light-transmitting surface of the flashlight and the transmitting and receiving window are respectively elliptical, hexagonal, quincunx or square.

In the above technical solution, the shape of the device body is circular, and the shapes of the light-transmitting surface of the flashlight and the transmitting and receiving window are respectively oval, circular, hexagonal, quincunx or square.

In the above technical solution, the shape of the device body is hexagonal, and the shapes of the light-transmitting surface of the flashlight and the emitting and receiving window are respectively circular, hexagonal or quincunx.

In the above technical solution, the shape of the device body is a quincunx shape, and the shapes of the light-transmitting surface of the flashlight and the emitting and receiving window are respectively circular, hexagonal or quincunx.

In the above technical solution, the shape of the device body is square, and the shapes of the light-transmitting surface of the flashlight and the transmitting and receiving window are respectively oval, circular, hexagonal, quincunx or square.

An imaging device includes the above-mentioned flash lighting module with short-distance light ranging function.

Compared with prior art, the beneficial effect of the present invention is:

The flashlight lighting module with short-distance light ranging function integrates several flashlights and distance measuring sensor functional modules. The distance measuring sensor function module is provided with a transmitting and receiving window, and the several flashlights are provided with flashlight transparent The glossy surface can automatically adjust the exposure index of the flash according to the distance and the strength of the ambient light, and feed back the ranging result to the camera lens module to realize the auto focus function of the lens, so that the use of the short-range The photographing function of the camera device of the flashlight lighting module with the optical ranging function can be more intelligent, the far and near images are clearer, and the picture quality is more beautiful.

Description of drawings

A flash lighting module and camera device with short-distance light ranging function according to the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is one of the structural representations of a flashlight lighting module with short-distance light ranging function according to the present invention;

Fig. 2 is the second structural schematic diagram of a flash lighting module with short-distance light ranging function according to the present invention;

Fig. 3 is a structural schematic diagram of a flash lighting device of a flash lighting module with short-distance light ranging function according to the present invention;

Fig. 4 is a structural schematic diagram of a light distribution lens of a flashlight lighting module with short-distance light ranging function according to the present invention;

Fig. 5 is the sectional view of T-T direction in Fig. 3;

Fig. 6 is the sectional view of X-X direction in Fig. 3;

Fig. 7 is one of the working principle diagrams of a flash lighting module with short-distance light ranging function described in Embodiment 1 of the present invention;

Fig. 8 is the second working principle diagram of a flash lighting module with short-distance light ranging function according to the first embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a flash lighting module with short-distance light ranging function according to Embodiment 2 of the present invention;

Fig. 10 is one of the working principle diagrams of a flashlight lighting module with short-distance light ranging function described in Embodiment 2 of the present invention;

Fig. 11 is the second working principle diagram of a flash lighting module with short-distance light ranging function according to the second embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a flashlight lighting module with short-distance light ranging function according to Embodiment 3 of the present invention;

Fig. 13 is one of the working principle diagrams of a flash lighting module with short-distance light ranging function described in Embodiment 3 of the present invention;

Fig. 14 is the second working principle diagram of a flash lighting module with short-distance light ranging function according to the third embodiment of the present invention;

Fig. 15 is a schematic structural diagram of a flashlight lighting module with short-distance light ranging function described in Embodiment 4 of the present invention;

Fig. 16 is a schematic structural diagram of a flashlight lighting module with short-distance light ranging function according to Embodiment 5 of the present invention;

Fig. 17 is a schematic structural diagram of a flash lighting module with short-distance light ranging function described in Embodiment 6 of the present invention;

Fig. 18 is a schematic structural view of a prism film of a flash lighting module with short-distance light ranging function described in Embodiment 6 of the present invention;

Fig. 19 is a schematic structural diagram of a flashlight lighting module with short-distance light ranging function according to Embodiment 7 of the present invention;

Fig. 20 is a schematic structural view of a microprism film of a flashlight lighting module with short-distance light ranging function according to Embodiment 7 of the present invention.

Detailed ways

The following is the best example of a flashlight lighting module and camera device with short-distance light ranging function in the present invention, which does not limit the protection scope of the present invention.

Embodiment one

Please refer to FIG. 1 to FIG. 3, which shows a flashlight lighting module with short-distance light ranging function, including a circuit board 1, and one end of the circuit board 1 is provided with a control circuit pin 2, so The other end of the circuit board 1 is electrically connected to a flash lighting device 3, and the flash lighting device 3 includes a device body 31, a distance measuring sensor function module 32 arranged in the device body 31, and a distance measuring sensor function module 32 evenly surrounded by the distance measurement sensor function module 32. Several flashlights 33 around, the device body 31 is equipped with a flashlight light-transmitting surface 34 and a transmitting and receiving window 35, the transmitting and receiving window 35 is located above the distance measuring sensor functional module 32, and the flashlight light-transmitting surface 34 is located above the plurality of flash lamps 33 and connected to the outer periphery of the transmitting and receiving window 35 .

Preferably, the above-mentioned several flashlights 33 surrounding the distance measuring sensor functional module 32 are LED (Light Emitting Diode) flashlights, which have the function of illuminating the object to be photographed.

In this embodiment, the distance measuring sensor functional module 32 adopts FlightSenseTM technology, or Time-of-Flight technology (Time-of-Flight technology), which provides accurate measurement of the time it takes for the light to be reflected back by the target object. distance data. In this embodiment, the distance measuring sensor functional module 32 is preferably a VL6180X module provided by STMicroelectronics, as shown in the figure, which integrates a FlightSenseTM proximity sensor (proximity sensor) and an ambient light sensor (ALS, ambient-light sensor) , provides basic gesture recognition functions, simplifies user interface design, and improves product performance at the same time. And it supports many innovative applications in the market, including smartphones, tablet PCs, game controllers, and can also improve the performance of consumer electronics and industrial products.

The VL6180X module adopts an exquisite optical package of 4.8mm x 2.8mm x 1.0mm LGA12, which can accurately measure the target object of 100mm or more according to the working environment. The module is equipped with an I2C interface as well as two programmable GPIO pins. The main controller controls the optical module through the I2C interface to read the data of distance measurement or ambient light intensity; and the GPIO pins can be configured to implement threshold (threshold) applications.

The VL6180X module mentioned above and its explorer evaluation kit allow designers to easily realize the full potential of this proximity sensor module, not only allowing customers to quickly learn to use FlightSenseTM technology, but also supporting application development on actual devices. The kit includes a pluggable USB interface, an STM32Nucleo development board and a VL6180X sensor expansion board. The VL6180X sensor expansion board integrates the sensor, LED 4-digit display, distance measurement and ambient light sensing function control switch. The display can show target distance or ambient light intensity.

The flashlight lighting module with short-distance light ranging function integrates a flashlight 33 and a distance measuring sensor function module 32. The intensity of the light can automatically adjust the exposure index of the flash; and the distance measurement result is fed back to the lens module to realize the auto-focus function of the lens, making the shooting more intelligent, clearer near and far images, and more beautiful quality.

In this embodiment, the light-transmitting surface 34 of the flash lamp is a light-distributing lens, which is made of transparent PC or PMMA, and can also be made of other transparent resins.

In the production process, the light distribution lens and the emitting and receiving window 35 can be integrally formed with two materials or combined with parts of two materials.

Preferably, as shown in FIG. 6 , the junction of the light distribution lens and the emission-receiving window 35 forms a profile 4 with a cross-section of "<" shape to do one-piece double-molding, and the "<" profile 4 can make two kinds of The material is more stable after molding, and it is not easy to be separated when it is pushed by downward or upward external force. The "<"-shaped profile 4 can also increase the bonding strength of its structure.

In this embodiment, the concave incident surface 3411 is a concave conical surface.

The material of the transmitting and receiving window 35 is IR PMMA or IR PC (acrylic with infrared light transmission and visible light cut-off, or polycarbonate resin with infrared light transmission and visible light cut-off), and its transmission waveband is 700-1050nm , The projection rate is above 80%.

The circuit board 1 can be a flexible circuit board (FPC) or a printed circuit board (PCB), it can also be a rollable flexible circuit board (FPC), or a hard printed circuit board PCB, in this embodiment , the circuit board 1 is preferably a rollable flexible circuit board FPC.

Preferably, as shown in FIG. 3 , the flashlight 33 is provided with eight ring-shaped distributions around the distance measuring sensor functional module 32, each flashlight 33 is at least 40lm, and the light distribution lens is in the shape of a ring. Correspondingly arranged above the eight flash lamps 33 . Certainly, the number of the flash lamps 33 is not limited, and is preferably more than two.

Wherein, as shown in FIG. 4 to FIG. 8 , the light distribution lens includes several light distribution lens units 341 correspondingly arranged on the several flash lamps 33 , and the light distribution lens unit 341 includes light that can transmit light from the flash lamps 33 . The concave incident surface 3411, the total reflection side surface 3412 and the light emitting plane 3413, the concave incident surface 3411 is located directly above the flashlight 33, and the light is emitted from the center O of the light emitting surface of the flashlight 33, and the emitted light is consistent with the optical axis A part of the light with a relatively large angle of OZ (the light with an angle of about 40° to 65° with the optical axis OZ) is incident on the total reflection side 3412 after being incident on the concave incident surface 3411, and then incident on the total reflection The edge light at the bottom of the side 3412 is reflected and output from the upper light exit plane 3413, and the angle between the output light and the optical axis OZ is the maximum light distribution angle, which is 40 degrees; it is incident on the top edge of the total reflection side 3412 The light is output from the upper light exit plane 3413 after reflection, and the output light is parallel to the optical axis OZ, that is, the angle between it and the optical axis OZ is the minimum light distribution angle, which is 0 degrees. Therefore, all the light rays reflected by the total reflection side surfaces 3412 on the left and right sides of the optical axis OZ and output from the upper light emitting plane 3413 are distributed within the range of ±40 degrees with the optical axis, that is, the full beam angle is 80 degrees. range; and a part of the light with a relatively small angle with the optical axis OZ (the light with an angle between about 0 and 40° with the optical axis OZ), after passing through the concave incident surface 3411, directly from the upper light exit plane 3413 The output, which is not intercepted by the total reflection side 3412, after this part of the light is output from the upper light exit plane 3413, the maximum angle between it and the optical axis OZ is also 40 degrees. Therefore, all the light rays reflected by the total reflection side surfaces 3412 on the left and right sides of the optical axis OZ and output from the upper light emitting plane 3413 are distributed within the range of ±40 degrees with the optical axis OZ, that is, the full beam angle is 80 degrees. The two parts of the distributed light are superimposed on each other to form a relatively uniform light distribution with a light speed angle of 80 degrees, and the uniformity of the four corners of the lens is more than 30%. The so-called optical axis OZ is an axis passing through the center O of the light emitting surface of the flash lamp 33 and perpendicular to the light emitting surface of the flash lamp 33 .

Preferably, the total reflection side surface 3412 is set in a quincunx shape, and its function is to mix the outgoing light beam in the direction of the circumference, so that the color temperature of the output light beam is more uniform.

In order to prevent the structure of the internal flash lamp 33 and the components of the circuit board 1 from being observed from the light emitting plane 3413 of the light distribution lens unit 341 to the inside of the module and affect the overall aesthetics of the module, the light distribution lens is placed below the light distribution lens There is a totally reflective 90-degree right-angle CD ring pattern 5 (similar to the decorative pattern with metallic reflective luster on an optical disc), and the CD ring pattern 5 is set concentrically with the circular ring of the light emitting area of the module. The light incident from the outside of the light distribution lens to the inside of the lens, after being totally reflected by the CD ring pattern 5, returns to the outside of the light distribution lens along the original path, so when viewing from the outside of the light distribution lens, the light distribution lens cannot be seen The components arranged below, but only the reflection on the 5 sides of the CD ring pattern.

As shown in Figure 6, the 90-degree right-angle zigzag fold line below the light distribution lens in the figure is the CD ring pattern 5, and the light incident from the outside of the light distribution lens into the light distribution lens passes through the right-angle hypotenuse below the light distribution lens. Two total reflections are performed, and the light after total reflection will return to the outside of the light distribution lens along the original path, so the electronic components on the circuit board 1 under the light distribution lens cannot be seen from the outside of the light distribution lens, but can be seen A mirror-like reflection from the outside of the light distribution lens.

In the flashlight lighting module with short-distance light ranging function described in this embodiment, in order to improve the overall aesthetics, the device body 31, the light-transmitting surface 34 of the flashlight and the transmitting and receiving window 35 can be designed as Various shapes, such as: the shape of the device body 31 is oval, and the shape of the light-transmitting surface 34 of the flash lamp and the emitting and receiving window 35 is oval, hexagonal, quincunx or square; if the device body 31 is circular in shape, and the shape of the light-transmitting surface 34 of the flashlight and the emission-receiving window 35 can be oval, circular, hexagonal, quincunx or square; if the shape of the device body 31 is hexagonal Shape, the shape of the light-transmitting surface 34 of the flashlight and the emission-receiving window 35 can be circular, hexagonal or quincunx; The shape of the window 35 can be circular, hexagonal or plum-shaped; Hexagonal, quincunx or square. It can also be any other shape collocation, which is not limited.

Embodiment two

This embodiment provides a flash lighting module with short-distance light ranging function. The second embodiment is similar to the first embodiment above, except that the structure of the light distribution lens is modified.

Please refer to FIG. 9, the light distribution lens of this embodiment includes several light distribution lens units 341 correspondingly arranged on the several flash lamps 33, and the light distribution lens unit 341 includes a concave incident surface 3411, a zigzag total reflection Annular Fresnel surface 3414 and light-emitting plane 3413. In this embodiment, the light incident surface of the quincunx-shaped total reflection side 3412 in Embodiment 1 is divided into many small rings along the radial direction, and divided into sawtooth as shown in the figure. Type total reflection annular Fresnel surface 3414, the zigzag type total reflection annular Fresnel surface 3414 is arranged around the concave incident surface 3411 and is located directly above the flashlight 33, the concave incident surface 3411 is relative to the embodiment One of the concave incident surfaces 3411 is reduced to become a concave incident surface 3411 that occupies less than 1/3 of the size of the light incident surface.

As shown in Figures 10 to 11, the light is emitted from the center O of the light-emitting surface of the flash lamp 33, and a part of the light with a relatively large angle with the optical axis OZ (the angle with the optical axis OZ is between about 40° and 65°) light), incident on the zigzag total reflection annular Fresnel surface 3414, incident on the edge light of the outermost ring, after reflection, output from the upper light exit plane 3413, the angle between the output light and the optical axis OZ is the minimum light distribution angle, which is 0 degrees, that is, it is emitted parallel to the optical axis OZ; it is incident on the innermost ring of the zigzag total reflection ring Fresnel surface 3414 (that is, the first ring near the concave incident surface 3411 ) is output from the upper light exit plane 3413 after reflection, and the angle between the output light and the optical axis OZ is the largest light distribution angle, which is 40°, that is, the full angle is 80°. Therefore, all the light rays reflected by the zigzag total reflection annular Fresnel surfaces 3414 on the left and right sides of the optical axis OZ and output from the upper light emitting plane 3413 are distributed within the range of ±40 degrees with the optical axis. That is, the full angle of the beam angle is in the range of 80 degrees; and a part of the light with a relatively small angle with the optical axis OZ (the light with an angle between about 0 and 40° with the optical axis OZ) is incident on the concave incident surface 3411 , directly output from the upper light exit plane 3413, and the maximum included angle between this part of the output light and the optical axis OZ is also 40 degrees. Therefore, all the light incident from the concave conical surfaces 3414 on the left and right sides of the optical axis OZ and directly output from the upper light exit plane 3413 are distributed within the range of ±40 degrees with the optical axis, that is, the full beam angle is 80 degree range. The light rays of the two parts of the light distribution are superimposed on each other to form a relatively uniform light distribution with a full beam angle of 80 degrees, and the uniformity of the four corners of the lens exceeds 30%.

In this embodiment, the concave incident surface 3411 is a concave conical surface.

Embodiment Three

This embodiment provides a flash lighting module with short-distance light ranging function. The third embodiment is similar to the first embodiment above, except that the structure of the light distribution lens is modified.

This embodiment is suitable for situations where the uniformity of the flashlight is required to be higher, such as a camera device that focuses on close-range or macro shooting, and it is possible that the uniformity of the four corners of the photographed picture is required to exceed 40%, so the light distribution of the flashlight is required The lens unit distributes more light to the 4 corners of the screen, that is, the position where the beam angle is ±40°. At this time, the light intensity at the center of the outgoing beam can be weakened, and more light is distributed to the position of ±40°.

Please refer to FIG. 12 , the light distribution lens of this embodiment includes several light distribution lens units 341 correspondingly arranged on the several flash lamps 33 , and the light distribution lens unit 341 includes a concave incident surface that can transmit light from the flash lamps 33 3411, a total reflection side 3412, a concave total reflection conical surface 3415 and a light exit plane 3413, the concave incident surface 3411 is located directly above the flashlight 33, and the light emitted by the flashlight 33 is transmitted to the distribution through the concave incident surface 3411 The reflection of the total reflection side 3412 in the light lens unit 341 is emitted from the light exit plane 3413, or transmitted into the light distribution lens unit 341 through the concave incident surface 3411 and reflected onto the total reflection side 3412 by the concave total reflection conical surface 3415 The reflection again exits from the light exit plane 3413 .

As shown in Figures 13 to 14, the light is emitted from the center O of the light-emitting surface on the flashlight 33, and a part of the light with a relatively large angle with the optical axis OZ (the angle with the optical axis OZ is about 40° to 65°) The light between them), after being incident on the concave incident surface 3411, is incident on the total reflection side 3412, and the edge light incident on the top of the total reflection side 3412 is output from the upper light exit plane 3413 after reflection, and the output light and light The included angle of the axis OZ is the maximum light distribution angle, which is 40 degrees; the edge light incident on the bottom of the total reflection side 3412 is reflected and output from the upper light exit plane 3413, and the output light is parallel to the optical axis OZ, that is, its The included angle with the optical axis OZ is the minimum light distribution angle, which is 0 degrees. Therefore, all the light rays reflected by the total reflection side surfaces 3412 on the left and right sides of the optical axis OZ and output from the upper light emitting plane 3413 are distributed within the range of ±40 degrees with the optical axis, that is, the full beam angle is 80 degrees. range; for light rays with a relatively small angle with the optical axis OZ (preferably, the angle with the optical axis OZ is between 0 and 30°), a concave total reflection conical surface 3415 is added at the position of the light exit plane 3413 , it distributes a part of the light that would have been distributed to the central part of the light exit plane 3413, after total reflection again, and then hits the total reflection side 3412, and is re-reflected by the total reflection side 3412, and distributed to ±40° after being output from the light exit plane 3413 The position can play the role of filling light in the 4 corners of the shooting screen.

The concave incident surface 3411 can be a spherical surface, a conical surface, a quadric surface, or other polynomial curved surface. Here, it is preferably a spherical surface, which does not change the direction of the incident light, and only uses the total reflection side 3412 for light distribution.

Embodiment four

This embodiment provides a flash lighting module with short-distance light ranging function. This embodiment four is similar to the above embodiment, the difference is that the above embodiment one or embodiment two or embodiment three The transmitting and receiving windows 35 are all flat, without the functions of collimating and concentrating light. The detectable distance is relatively short, and can only accurately detect the distance within 100mm to 1 meter. For the relatively long detection distance, due to insufficient signal strength, Its detection sensitivity is not high.

A collimating and focusing lens can be respectively arranged under the transmitting and receiving window 35. Preferably, please refer to FIG. The reflective Fresnel lens 6 is correspondingly arranged on the infrared emitting tube 333 and the infrared receiving tube 334 of the distance measuring sensor functional module 32 . The material of the ring pattern total reflection Fresnel lens 6 adopts IR PMMA or IR PC (acrylic through which infrared light passes through and cuts off visible light, or polycarbonate resin through which infrared light passes through and cuts off visible light) in the infrared waveband. It is 700-1050nm, and the projection rate is more than 80%. The annular total reflection Fresnel lens 6 has a zigzag slope that is a total reflection surface, not a refraction surface, and turns light through the total reflection of the slope.

Specifically, the annular pattern total reflection Fresnel lens 6 has the function of collimating and concentrating light. The annular pattern total reflection Fresnel lens 6 first collimates the light emitted by the infrared emission tube 333, and the collimated The light can shoot out a relatively long distance and shine on the object being photographed. The annular total reflection Fresnel lens 6 located on the other side converges the reflected light of the object to be photographed and concentrates it on the infrared receiving tube 334 .

A flashlight lighting module with short-distance light ranging function described in this embodiment is provided with a ring pattern total reflection Fresnel lens 6 below the transmitting and receiving window 35, which respectively transmits and receives light. Collimation and convergence, the energy of emitted and received light is greatly concentrated, so the measured distance can be much farther, and it can measure a distance of more than 3 to 5 meters.

Embodiment five

The embodiment provides a flashlight lighting module with short-distance light ranging function. The fifth embodiment is similar to the fourth embodiment above, the difference is that it can also set a plane lens on the transmitting and receiving window 35 to Collimates and converges rays. The plane lens, which arranges microstructures with focusing or collimating functions on a plane, can be a refracting Fresnel lens, or a diffractive lens (or a holographic lens, English name DOE, Diffractive Optical Element, which is covered with micron-scale rings or other shaped microstructures).

Preferably, in this embodiment, please refer to FIG. 16 , an annular refraction Fresnel lens 7 is arranged on the transmitting and receiving window 35, and the annular refraction Fresnel lens 7 is correspondingly arranged on the distance measuring sensor On the infrared emitting tube 333 and the infrared receiving tube 334 of the functional module 32 . The material of the annular refraction Fresnel lens 7 adopts IR PMMA or IR PC (acrylic through which infrared light passes through and cuts off visible light, or polycarbonate resin through which infrared light passes through and cuts off visible light). The wave band is 700-1050nm, and the projection rate is over 80%. The refracting Fresnel lens 7 has a zigzag inclined surface as a refracting surface, which bends the light through the refraction of the inclined surface.

Specifically, the annular refraction Fresnel lens 7 has the functions of collimating and concentrating light. The annular refraction Fresnel lens 7 first collimates the light emitted by the infrared emitting tube 333, and the collimated The light can shoot out a relatively long distance and shine on the object being photographed. The refracting Fresnel lens 7 located on the other side converges the reflected light of the object to be photographed and concentrates it on the infrared receiving tube 334 .

A flash lighting module with short-distance light ranging function described in this embodiment is equipped with a ring-shaped refracting Fresnel lens 7 on the transmitting and receiving window 35, which can align the emitted and received light rays respectively. Straight and converging, the energy of emitting and receiving light is highly concentrated, so the measured distance can be much farther, and it can measure a distance of more than 3 to 5 meters.

Embodiment six

This embodiment provides a flash lighting module with short-distance light ranging function. The sixth embodiment is different from the above embodiments in that, please refer to FIG. 17, the light-transmitting surface 34 of the flash is a CD ring pattern , which is a 90° CD ring running through the entire circumference, and a prism film 8 whose texture is perpendicular to the direction of the CD ring is placed between the CD ring and the flash lamp 33 .

Please refer to Fig. 18, the direction of the prism patterns of the prism film 8 is the radial direction, which is formed by a number of V-shaped microprisms arranged in a rotating arrangement along the radial direction, and the lines are arranged in a circumferential direction with the top. The CD lines cross each other vertically.

Because the prism film 8 itself has the effect of concentrating the surface light source, such as the brightness enhancement film in the backlight module, it is a V-shaped micro-prism array with a profile line angle of about 90°, which can be placed perpendicular to the prism pattern. Converge the light in the direction of the light, and converge to a range of about 70° to 80°.

The present embodiment adopts two prisms whose stripe directions are perpendicular to each other. The first sheet is a prism film 8 in which the prism stripes are arranged radially. ) converge into a range of seventy or eighty degrees. The second prism is the CD ring pattern itself, which then converges the outgoing light of the surface light source along the direction perpendicular to the prism pattern (that is, the radial direction) into a beam angle of 70 to 80 degrees.

The prism film 8 can also be cut from the brightness-enhancing film (BEF or DBEF) used on the existing backlight module, which can be cut into the same number as the LEDs and combined by splicing. The direction is perpendicular to the direction of the upper CD annulus.

Embodiment seven

This embodiment provides a flash lighting module with short-distance light ranging function. The seventh embodiment is similar to the sixth embodiment above, except that the prism film 8 is replaced by a micro-prism film 9. Please refer to the figure 19. The light-transmitting surface 34 of the flash lamp is a CD ring pattern, which runs through the entire circumference with a 90° CD ring pattern, and between the CD ring pattern and the flash lamp 33 is placed a micro Prism film9.

Please refer to Fig. 20, described microprism film 9, it is the diaphragm that microcube prism array forms, and it is different from the prism array that the embodiment 6 is arranged in a single direction, and it can be perpendicular to edge several directions from Converge the incident light rays from the surface light source.

Embodiment Eight

This embodiment provides an imaging device, which includes a flash lighting module with short-distance light ranging function described in any of the above-mentioned embodiments. In addition to the function of lighting, it can also automatically focus and adjust the shooting lighting mode according to the intensity of ambient light and the distance of the subject (such as the exposure index of the flash, including the intensity of the flashing light, the flashing time, or the color temperature of the flashing light and other parameters), and has strong functionality, which overcomes the problem of the single function of the flashlight module of the traditional camera device, and meets the market's demand for multifunctionality of the flashlight module.

The camera device includes digital cameras, video cameras, mobile phones with cameras and other electronic products with camera functions.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (26)

1. a kind of flash lamp illumination module with short distance ligh-ranging function, including circuit board (1), the circuit board (1) One end is equipped with control circuit pin (2), and the other end of the circuit board (1) is electrically connected with flash lamp illumination device (3), feature It is：The distance measuring sensor work(that the flash lamp illumination device (3) includes device body (31), is set in device body (31) Energy module (32) and several flash lamps (33) for being uniformly disposed around distance measuring sensor function module (32) surrounding, described device sheet Body (31) is equipped with flash lamp transparent surface (34) and transmitting receives window (35), and the transmitting receives window (35) and is located at the survey Top away from sensor function module (32), the flash lamp transparent surface (34) are located at the top of several flash lamps (33) And be connected with the peripheral part of the transmitting reception window (35), the flash lamp transparent surface (34) includes that several are correspondingly arranged Light-distribution lens unit (341) on several described flash lamps (33), the light-distribution lens unit (341) include indent incidence Face (3411), sawtooth pattern total reflection ring grain Fresnel surface (3414) and exit plane (3413), the sawtooth pattern are totally reflected ring grain Fresnel surface (3414) is arranged around the indent plane of incidence (3411) and positioned at the surface of flash lamp (33), the flash of light The light that lamp (33) is sent out is totally reflected ring grain Fresnel surface (3414) by the sawtooth pattern and reflects at exit plane (3413) It projects.

2. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： The distance measuring sensor function module (32) is VL6180X modules, is by short distance sensor and ambient light sensor institute Composition.

3. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： The flash lamp transparent surface (34) and transmitting receive window (35) and are integrally formed.

4. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1 or 3, feature exist In：The flash lamp transparent surface (34) and transmitting receive window (35) junction Formation cross-section be "<" type profile (4).

5. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： It is described transmitting receive window (35) material use saturating infrared band IR PMMA or IR PC, transmission band be 700~ 1050nm, 80% or more projection ratio.

6. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： CD ring grains (5) are provided with below the flash lamp transparent surface (34), the CD ring grains (5) at right angles zigzag broken line setting.

7. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： The circuit board (1) be can coiling flexible PCB FPC.

8. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： The flash lamp (33) is equipped with eight, is distributed around the distance measuring sensor function module (32) in circular, the sudden strain of a muscle Light lamp transparent surface (34) is correspondingly arranged at the top of eight flash lamps (33) in annular shape.

9. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, it is characterised in that： The flash lamp transparent surface (34) is light-distribution lens, using transparent PC or PMMA materials.

10. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 9, feature exist In：The flash lamp transparent surface (34) includes the light-distribution lens list that several are correspondingly arranged on several described flash lamps (33) First (341), the light-distribution lens unit (341) include the indent plane of incidence (3411) of transmissive flash lamp (33) light, are all-trans Side (3412) and exit plane (3413) are penetrated, the indent plane of incidence (3411) is located at the surface of flash lamp (33), described The light that flash lamp (33) is sent out is transmitted in light-distribution lens unit (341) through the indent plane of incidence (3411) by being totally reflected side (3412) reflection is projected at exit plane (3413).

11. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 10, feature exist In：The total reflection side (3412) is arranged to quincunx.

12. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1 or 10, feature It is：The indent plane of incidence (3411) is indent conical surface.

13. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 9, feature exist In：The flash lamp transparent surface (34) includes the light-distribution lens list that several are correspondingly arranged on several described flash lamps (33) First (341), the light-distribution lens unit (341) include the indent plane of incidence (3411) of transmissive flash lamp (33) light, are all-trans Penetrate side (3412), recessed total reflection conical surface (3415) and exit plane (3413), the indent plane of incidence (3411) Surface positioned at flash lamp (33), it is saturating that the light that the flash lamp (33) sends out through the indent plane of incidence (3411) is transmitted to light distribution It is projected at exit plane (3413) or through indent incidence in mirror unit (341) by being totally reflected the reflection of side (3412) Face (3411) is transmitted in light-distribution lens unit (341) and is reflected into full reflection side by recessed total reflection conical surface (3415) Secondary reflection projects at exit plane (3413) again on face (3412).

14. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 13, feature exist In：The indent plane of incidence (3411) is interior concave spherical surface.

15. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The transmitting receives and is provided with ring grain total reflection Fresnel Lenses (6) below window (35), which is totally reflected Fresnel Lens (6) are correspondingly arranged at the infrared transmitting tube (333) and infrared receiving tube (334) of the distance measuring sensor function module (32) On.

16. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 15, feature exist In：The material of the ring grain total reflection Fresnel Lenses (6) uses IR PMMA or the IR PC of saturating infrared band, transmission band For 700~1050nm, 80% or more projection ratio.

17. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The transmitting receives and is provided with ring grain refractive type Fresnel lens (7) on window (35), the ring grain refractive type Fresnel lens (7) it is correspondingly arranged on infrared transmitting tube (333) and the infrared receiving tube (334) of the distance measuring sensor function module (32).

18. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 17, feature exist In：The material of the ring grain refractive type Fresnel lens (7) uses IR PMMA or the IR PC of saturating infrared band, transmission band For 700~1050nm, 80% or more projection ratio.

19. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The flash lamp transparent surface (34) is CD ring grains, and prism film (8) is provided between the CD ring grains and the flash lamp (33), The prism film (8) is arranged in a manner of rotating display along radial direction by the microprism of several V-shaped.

20. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The flash lamp transparent surface (34) is CD ring grains, and microprism film is provided between the CD ring grains and the flash lamp (33) (9), the microprism film (9) is made of several miniature micro-prism array.

21. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The shape of described device ontology (31) is ellipse, and the flash lamp transparent surface (34) and transmitting receive the shape of window (35) Shape is respectively ellipse, hexagon, quincunx or square.

22. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The shape of described device ontology (31) is circle, and the flash lamp transparent surface (34) and transmitting receive the shape of window (35) Respectively ellipse, circle, hexagon, quincunx or square.

23. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The shape of described device ontology (31) is hexagon, and the flash lamp transparent surface (34) and transmitting receive the shape of window (35) Shape is respectively round, hexagon or quincunx.

24. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The shape of described device ontology (31) is quincunx, the shape of the flash lamp transparent surface (34) and transmitting reception window (35) Shape is respectively round, hexagon or quincunx.

25. a kind of flash lamp illumination module with short distance ligh-ranging function according to claim 1, feature exist In：The shape of described device ontology (31) is square, and the flash lamp transparent surface (34) and transmitting receive the shape of window (35) Shape is respectively ellipse, circle, hexagon, quincunx or square.

26. a kind of photographic device, it is characterised in that：It is described a kind of with short distance flash ranging including any one of claim 1~25 Flash lamp illumination module away from function.