CN115499639A - Display device and electronic equipment with 3D module of making a video recording - Google Patents

Display device and electronic equipment with 3D module of making a video recording Download PDF

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Publication number
CN115499639A
CN115499639A CN202210003172.9A CN202210003172A CN115499639A CN 115499639 A CN115499639 A CN 115499639A CN 202210003172 A CN202210003172 A CN 202210003172A CN 115499639 A CN115499639 A CN 115499639A
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China
Prior art keywords
light
lens
laser
shot
camera module
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Granted
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CN202210003172.9A
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Chinese (zh)
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CN115499639B (en
Inventor
张天舒
黄瑞彬
朱力
吕方璐
汪博
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Shenzhen Guangjian Technology Co Ltd
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Shenzhen Guangjian Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/261—Image signal generators with monoscopic-to-stereoscopic image conversion
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/48—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus
    • G03B17/54—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with projector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/33—Transforming infrared radiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)

Abstract

The invention provides a display device and electronic equipment with a 3D camera module, comprising: the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes at least two light transmissive regions; the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module; the laser module comprises a structured light projector and a projection lens; the projection lens comprises a lens component and a first lamp mirror; a structured light projector for projecting structured light towards the lens assembly, the structured light comprising a plurality of randomly distributed laser beams; the lens assembly is used for converging a plurality of laser beams and then enabling the laser beams to enter the light inlet surface of the first lamp mirror; the first lamp mirror is used for enabling a plurality of incident laser beams to be emitted in parallel or to be emitted approximately in parallel so that the laser beams irradiate the object to be shot through a light transmission area. The invention can make the depth camera module with the projection lens suitable for being installed in a narrow gap without being shielded by the FOV.

Description

Display device and electronic equipment with 3D module of making a video recording
Technical Field
The invention relates to the technical field of display, in particular to a display device with a 3D camera module and electronic equipment.
Background
With the development of the market, the requirements of consumers on the display effect of the display screen are more and more stringent, and the requirements are not only on diversified appearance designs, but also on the requirement that the screen ratio is higher and better. The full screen technology realizes the screen occupation ratio of more than 90 percent by the design of an ultra-narrow frame or even no frame.
The mobile phone with the comprehensive screen realizes the maximization of the display area under the condition that the mobile phone body is not changed, so that the display effect is more brilliant. The existing structural design based on a full-screen is that a non-display area, namely Liu Haiou, is arranged at the top of a display substrate for installing devices such as a depth camera module in a 3D camera module, but the attractiveness and the full-screen experience of a display device can be influenced.
Disclosure of Invention
In view of this, the present invention provides a display device and an electronic apparatus having a 3D camera module, so as to solve the problem that the non-display area of the existing depth camera module affects the beauty and the overall screen experience of the display device.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the display device with a 3D camera module according to the present invention includes a display substrate and a 3D camera module;
the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes at least two light transmissive regions;
the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module and an imaging module;
the laser module comprises a structured light projector and a projection lens; the projection lens comprises a lens component and a first lamp mirror; the structured light projector is used for projecting structured light to the lens component, and the structured light comprises a plurality of laser beams which are distributed randomly; the lens assembly is used for converging the laser beams and then enabling the laser beams to enter the light inlet surface of the first lamp mirror; the first lamp mirror is used for enabling the incident multiple laser beams to be emitted in parallel or to be emitted approximately in parallel so that the laser beams irradiate an object to be shot through a light transmission area;
the imaging module is used for receiving the laser reflected by the object to be shot through the other light-transmitting area and obtaining a depth image of the surface of the object to be shot according to the received spot pattern of the laser reflected by the object to be shot.
Preferably, the light-transmitting area is provided with an infrared film layer;
the first lamp mirror is used for enabling the divergent incidence of the multiple beams of laser to penetrate through an infrared film layer and a light transmission area to irradiate on an object to be shot;
the imaging module is used for receiving the infrared laser reflected by the object to be shot through another infrared film layer and another light-transmitting area and obtaining a depth image of the surface of the object to be shot according to the infrared laser.
Preferably, the lens assembly includes a first lens, a second lens and a lens barrel;
the first lens and the second lens are arranged on the light incident side of the lens barrel; the first lamp mirror is arranged on the light emergent side of the lens barrel;
the first lens is used for converging the laser beams and then projecting the laser beams to the second lens;
the second lens is used for converging the laser beams projected by the first lens again and projecting the laser beams to the light incident surface of the first lamp mirror.
Preferably, a concave light inlet is arranged on the light inlet side of the first lamp mirror;
the bottom surface of the light inlet is a light inlet surface; the light incident surface is a convex surface; the diaphragm of the projection lens is arranged on the convex surface;
the light incident surface is used for enabling the incident multiple beams of laser to be emitted in parallel or to be emitted approximately in parallel.
Preferably, the laser module comprises a beam splitting device located between the structured light projector and the projection lens;
the structured light projector adopts a laser array and is used for projecting dot matrix laser;
the light splitting device is positioned on the light emitting side of the laser array and used for splitting the lattice laser into a plurality of randomly distributed lasers.
Preferably, the structured light projector comprises an edge-emitting laser, a collimating lens, a reflecting device and a light splitting device between the laser module and the projection lens;
the edge-emitting laser is used for projecting laser to the collimating lens;
the collimating lens is positioned on the light-emitting side of the edge-emitting laser and is used for collimating the incident laser and emitting a collimated light beam;
the reflecting device is positioned on the light-emitting side of the collimating lens and used for reflecting the collimated light beam and projecting the collimated light beam to the light splitting device;
the light splitting device is positioned on the light emitting side of the reflecting device and used for splitting the collimated light beams projected by the reflecting device into a plurality of laser beams which are distributed randomly.
Preferably, the depth camera module comprises a driving circuit connected with the laser module and the imaging module;
the driving circuit is used for controlling the laser module and the imaging module to be simultaneously turned on or turned off, and controlling the output light power of the laser module by controlling the driving current of the laser module.
Preferably, the imaging module comprises a second lamp mirror, a receiving lens and a photodetector array; the light detector array comprises a plurality of light detectors distributed in an array;
the second lamp mirror is used for receiving the laser reflected by the object to be shot through the other light-transmitting area, and after the laser is contracted to the narrowest position at the diaphragm, the laser is divergently projected to the receiving lens;
the receiving lens is used for converging parallel laser beams incident at the same angle on an upper optical detector positioned on a focal plane of the receiving lens;
the optical detector is used for receiving the laser to generate a light spot pattern and obtaining a depth image of the surface of the object to be shot according to the light spot pattern.
Preferably, the depth camera module comprises a processing module; the 3D camera module further comprises a 2D imaging module;
the 2D imaging module is used for shooting a 2D image of the object to be shot;
and the processing module is used for obtaining a 3D image of the object to be shot according to the depth image and the 2D image.
The electronic equipment provided by the invention comprises the display device.
In a second aspect, the display device with a 3D camera module according to the present invention is characterized by comprising a display substrate and a 3D camera module;
the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes a first light-transmitting region, a second light-transmitting region and a third light-transmitting region;
the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module and an imaging module;
the laser module comprises a floodlight projector, a structured light projector and a projection lens; the projection lens comprises a lens component and a lamp mirror; the structured light projector is used for projecting structured light to the lens assembly, and the structured light comprises a plurality of laser beams which are distributed randomly; the lens assembly is used for converging the multiple laser beams and then enabling the multiple laser beams to enter the light incident surface of the lamp mirror; the lamp mirror is used for enabling the incident multiple laser beams to irradiate an object to be shot through a first light transmission area;
the imaging module is used for receiving the laser reflected by the object to be shot through the second light-transmitting area and obtaining a depth image of the surface of the object to be shot according to the received spot pattern of the laser reflected by the object to be shot;
and the floodlight projector is used for projecting floodlight to the object to be shot through the third light transmission area according to a preset light intensity threshold value so as to illuminate.
Preferably, the first light transmission region is provided with a first infrared film layer, the second light transmission region is provided with a second infrared film layer, and the third light transmission region is provided with a third infrared film layer;
the lamp mirror is used for enabling the plurality of beams of infrared laser which are divergently incident to penetrate through the first infrared film layer and the first light transmission area to irradiate on an object to be shot;
the imaging module is used for receiving the infrared laser reflected by the object to be shot through another second infrared film layer and a second light transmission area and obtaining a depth image of the surface of the object to be shot according to the infrared laser;
and the floodlight projector is used for projecting floodlight to the object to be shot through the third infrared film layer and the third light transmission area when the illuminance is lower than a preset illuminance threshold value so as to illuminate.
Preferably, the lens assembly includes a first lens, a second lens and a lens barrel;
the first lens and the second lens are sequentially arranged on the light incident side of the lens barrel; the lamp mirror is arranged on the light-emitting side of the lens barrel;
the first lens is used for converging the laser beams and then projecting the laser beams to the second lens;
the second lens is used for converging the laser beams projected by the first lens again and projecting the laser beams to the light incident surface of the lamp mirror.
Preferably, a concave light inlet is arranged on the light inlet side of the lamp mirror;
the bottom surface of the light inlet is a light inlet surface; the light incident surface is a convex surface; the diaphragm of the projection lens is arranged on the convex surface;
the light incident surface is used for enabling the incident multiple beams of laser to be emitted in parallel or to be emitted approximately in parallel.
Preferably, the laser module comprises a beam splitting device located between the structured light projector and the projection lens;
the structured light projector adopts a laser array and is used for projecting lattice laser;
the light splitting device is positioned on the light emitting side of the laser array and used for splitting the lattice laser into a plurality of randomly distributed laser beams.
Preferably, the structured light projector comprises an edge-emitting laser, a collimating lens, a reflecting device and a light splitting device between the laser module and the projection lens;
the edge-emitting laser is used for projecting laser to the collimating lens;
the collimating lens is positioned on the light-emitting side of the edge-emitting laser and is used for collimating the incident laser and emitting a collimated light beam;
the reflecting device is positioned on the light-emitting side of the collimating lens and used for reflecting the collimated light beam and projecting the collimated light beam to the light splitting device;
the light splitting device is positioned on the light emitting side of the reflecting device and used for splitting the collimated light beams projected by the reflecting device into a plurality of laser beams which are distributed randomly.
Preferably, the depth camera module comprises a driving circuit connected with the laser module and the imaging module;
the driving circuit is used for controlling the laser module and the imaging module to be simultaneously turned on or turned off, and controlling the output light power of the laser module by controlling the driving current of the laser module.
Preferably, the imaging module comprises a second lamp mirror, a receiving lens and a light detector array; the light detector array comprises a plurality of light detectors distributed in an array;
the second lamp mirror is used for receiving the laser reflected by the object to be shot through the other light-transmitting area, and after the laser is contracted to the narrowest position at the diaphragm, the laser is divergently projected to the receiving lens;
the receiving lens is used for converging parallel laser beams incident at the same angle on an upper optical detector positioned on a focal plane of the receiving lens;
the optical detector is used for receiving the laser to generate a light spot pattern and obtaining a depth image of the surface of the object to be shot according to the light spot pattern.
Preferably, the depth camera module comprises a processing module; the 3D camera module further comprises a 2D imaging module;
the 2D imaging module is used for shooting a 2D image of the object to be shot;
and the processing module is used for obtaining a 3D image of the object to be shot according to the depth image and the 2D image.
The electronic equipment provided by the invention comprises the display device.
In a third aspect, the display device with a 3D camera module according to the present invention includes a display substrate and a 3D camera module;
the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes at least two light transmissive regions;
the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module and an imaging module;
the laser module comprises a floodlight source and a projection lens; the projection lens comprises a lens component and a first lamp mirror; the floodlight source is used for emitting floodlight; the lens assembly is used for enabling the floodlight to be incident to the light incident surface of the first light mirror after being converged; the first lamp mirror is used for enabling the incident floodlight to irradiate on an object to be shot through a light transmission area;
and the imaging module is used for receiving floodlight reflected by the object to be shot through another light transmission area and obtaining a depth image of the surface of the object to be shot according to the time delay or the phase difference of the floodlight.
Preferably, the light-transmitting area is provided with an infrared film layer;
the first lamp mirror is used for enabling the diffused incident floodlight to penetrate through an infrared film layer and a light transmission area to irradiate on an object to be shot;
and the imaging module is used for receiving floodlight reflected by the object to be shot through another infrared film layer and another light transmission area and obtaining a depth image of the surface of the object to be shot according to the floodlight.
Preferably, the lens assembly includes a first lens, a second lens and a lens barrel;
the first lens and the second lens are sequentially arranged on the light incident side of the lens barrel; the first lamp mirror is arranged on the light emergent side of the lens barrel;
the first lens is used for projecting the floodlight to the second lens after being converged;
and the second lens is used for converging the floodlight projected by the first lens again and then projecting the floodlight to the light inlet surface of the first lamp mirror.
Preferably, a concave light inlet is arranged on the light inlet side of the first lamp mirror;
the bottom surface of the light inlet is a light inlet surface; the light incident surface is a convex surface; the diaphragm of the projection lens is arranged on the convex surface;
the light incident surface is used for enabling the incident floodlight to be emergent.
Preferably, the floodlight source comprises a diffusion sheet, a light splitting device and a laser array;
the laser array is used for emitting dot matrix laser;
the light splitting device is positioned on the light emitting side of the laser array and is used for splitting the lattice laser projected by the laser array into a plurality of discretely distributed laser beams;
the diffusion sheet is arranged on the light emitting side of the light splitting device and used for diffusing the multiple laser beams and enabling the multiple laser beams to be subjected to floodlight emission to the projection lens.
Preferably, the floodlight source comprises a reflecting device, a collimating lens, a light splitting device, a diffusion sheet and an edge-emitting laser;
the edge-emitting laser is used for emitting laser;
the collimating lens is positioned on the light-emitting side of the edge-emitting laser and is used for collimating the incident laser and emitting a collimated light beam;
the reflecting device is positioned on the light-emitting side of the collimating lens and used for reflecting the collimated light beam and projecting the collimated light beam to the light splitting device;
the light splitting device is positioned on the light emitting side of the reflecting device and is used for splitting the laser projected by the reflecting device into a plurality of laser beams;
the diffusion sheet is arranged on the light emitting side of the light splitting device and used for diffusing the multiple laser beams and enabling the multiple laser beams to be subjected to floodlight emission to the projection lens.
Preferably, the depth camera module comprises a driving circuit connected with the laser module and the imaging module;
the driving circuit is used for controlling the laser module and the imaging module to be simultaneously turned on or turned off and controlling the output light power of the laser module by controlling the driving current of the laser module.
Preferably, the imaging module comprises a second lamp mirror, a receiving lens and a photodetector array; the light detector array comprises a plurality of light detectors distributed in an array;
the second lamp mirror is used for receiving floodlight reflected by the object to be shot through another light transmission area, and divergently projecting the floodlight to the receiving lens after the floodlight is contracted to the narrowest position at the diaphragm;
the receiving lens is used for converging the parallel floodlight incident at the same angle on an upper light detector positioned on a focal plane of the receiving lens;
and the light detector is used for receiving the floodlight and obtaining a depth image of the surface of the object to be shot according to the time delay or the phase difference of the floodlight.
Preferably, the floodlight source adopts an LED light source.
The electronic equipment provided by the invention is characterized by comprising the display device.
The electronic equipment provided by the invention comprises the display device.
Compared with the prior art, the invention has the following beneficial effects:
the projection lens of the invention converges light to the first lamp lens through the first lens and the second lens of the lens component, and the diaphragm is positioned on the light incident surface of the first lamp lens, so that the depth camera module with the projection lens is suitable for being installed in a narrow gap without being shielded by FOV, thus realizing the application of the invention on a narrow-frame screen (a narrow screen with a black matrix area), and also being capable of enabling the first lamp lens to be tightly attached to a mobile phone glass cover plate to play a dustproof role;
according to the display device and the electronic equipment with the 3D camera module, the depth camera module is arranged on the backlight side of the black matrix area of the display substrate, so that a non-display area, namely a sea area, does not need to be arranged at the top of the display device, the depth camera module is installed, and the attractiveness and the comprehensive screen experience of the display device cannot be influenced;
according to the invention, the infrared film layer is arranged in the light transmission area of the black matrix area, the infrared film layer can transmit infrared light so as not to influence the work of the depth camera module, but visible light cannot penetrate through the infrared film layer, so that the integrity of the black matrix area is ensured, and the attractiveness of a display screen is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a display device according to a variation of the present invention;
FIG. 3 is a schematic diagram of a set of laser module installations in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of another set of laser modules according to an embodiment of the present invention;
FIG. 5 is a schematic view of an installation of an imaging module in an embodiment of the invention;
FIG. 6 is a schematic view of a set of installation of a depth camera module according to a variation of the present invention;
FIG. 7 is a schematic view of another set of depth camera modules according to a variation of the present invention;
FIG. 8 is a schematic diagram of a display device based on an EEL laser according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a VCSEL laser based display device in an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to a first embodiment of the invention;
fig. 11 is a schematic structural diagram of a display device according to a second embodiment of the present invention;
FIG. 12 is a schematic structural diagram of a projection lens according to an embodiment of the invention;
FIG. 13 is a schematic view of another structure of a projection lens according to an embodiment of the invention;
FIG. 14 is a spot diagram of multiple lasers according to an embodiment of the present invention.
In the figure:
10 is a display substrate; 11 is a laser module; 12 is an imaging module; 1201 is a second lamp mirror; 1202 is receiving lens; 1203 is a photodetector array; 13 is a light splitting device; 14 is a driving circuit; 15 is a processing module; 16 is a lens assembly; 1601 is a first lens; 1602 is a second lens; 1603 is a space ring; 1604 is a lens barrel; 1605 is a bulkhead; 17 is a reflecting device; 18 is a collimating lens; 19 is a first lamp mirror; 20 is a black matrix region; 21 is a diffusion sheet; 30 is a display area; 40 is an inner screen; and 50 is a flood projector.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As described in the background art, in the conventional structural design based on a full-screen, in order to mount devices such as a depth camera module in a 3D camera module, a non-display area Liu Haiou is disposed on the top of a display substrate, but this may affect the beauty and the full-screen experience of the display device.
The inventor has found that the conventional depth camera module uses a Vertical Cavity Surface Emitting Laser (VCSEL) as a light source, but since the output optical power of the VCSEL Laser is low, when the transmittance of the display substrate is low, the optical power of the Laser passing through the display panel is low, and an effective depth image cannot be obtained, it is necessary to provide a non-display area, i.e., liu Haiou, on the top of the display substrate, and to dig a hole in the non-display area to mount the VCSEL Laser.
Based on this, an embodiment of the present invention provides a display device having a 3D camera module, as shown in fig. 1, including a display substrate 10 and the 3D camera module, where the 3D camera module includes a depth camera module located on a backlight side of the display substrate 10. It should be noted that the depth camera module in the embodiment of the present invention is an infrared camera module, and the laser module employs an infrared laser that emits infrared laser. The laser module adopts a vertical cavity surface emitting laser array, an edge emitting laser and a semiconductor laser.
The light-emitting side of the display substrate is a side capable of displaying images, and the backlight side is a side incapable of displaying images. That is, the depth camera module in the embodiment of the invention may be located below the display substrate 10, i.e., may be disposed below the screen, without damaging the structure of the display substrate 10, for example, without digging a hole in the non-display area on the top of the display substrate 10 to dispose the depth camera module. The display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes at least two light transmissive regions. In some embodiments, the black matrix region includes a first light transmissive region, a second light transmissive region, and a third light transmissive region. The light-transmitting area is a circular area with the diameter smaller than 1 millimeter.
In the embodiment of the present invention, the depth camera module includes a laser module 11 and an imaging module 12. The laser module 11 and the imaging module 12 are both located on the backlight side of the display substrate 10, and the light outlet of the laser module 11 is disposed toward the display substrate 10, so that laser can irradiate onto an object to be photographed, which is located on the light outlet side of the display substrate 10, through a light-transmitting area, and the light inlet of the imaging module 12 is disposed toward the display substrate 10, so that laser reflected by the object to be photographed enters the imaging module 12 through another light-transmitting area.
Wherein the laser module 11 comprises a structured light projector and a projection lens; the projection lens comprises a lens assembly 16 and a first lamp mirror 19; the structured light projector is used for projecting structured light to the lens component, and the structured light comprises a plurality of laser beams which are distributed randomly; the lens assembly 16 is configured to converge the multiple laser beams and then irradiate the multiple laser beams to the light incident surface of the first lamp mirror; the first lamp mirror 19 is used for enabling the incident multiple laser beams to be emitted in parallel or approximately emitted in parallel so as to enable the laser beams to irradiate an object to be shot through a light transmission area;
the imaging module 12 is configured to receive the laser reflected by the object to be photographed through another light-transmitting area, and obtain a depth image of the surface of the object to be photographed according to a spot pattern of the received laser reflected by the object to be photographed. The depth image comprises depth information of different areas of the surface of the object to be photographed.
Because the laser module 11 and the imaging module 12 are arranged on the backlight side of the black matrix area, a non-display area is not required to be arranged at the top of the display device to install the depth camera module, and the attractiveness and the overall screen experience of the display device cannot be influenced.
Moreover, since the laser module 11 and the imaging module 12 are both disposed on the backlight side of the display substrate 10, the arrangement and combination of the laser module 11 and the imaging module 12 have multiple possibilities, and the distance between the laser module 11 and the imaging module 12 can be increased on the premise of not affecting the beauty, so as to improve the shooting accuracy of the depth camera module, as shown in fig. 2, the laser module 11 and the imaging module 12 can be disposed in the black matrix areas on both sides, respectively.
In some embodiments, the laser module 11 includes a flood projector, a structured light projector, and a projection lens; the projection lens comprises a lens assembly 16 and a lamp mirror 19; the structured light projector is used for projecting structured light to the lens component, and the structured light comprises a plurality of laser beams which are distributed randomly; the lens assembly 16 is configured to converge the multiple laser beams and then irradiate the multiple laser beams to the light incident surface of the lamp mirror; the lamp mirror 19 is used for enabling the incident multiple laser beams to be emitted in parallel or approximately in parallel so as to enable the laser beams to irradiate an object to be shot through a first light transmission area;
the imaging module 12 is configured to receive the laser reflected by the object to be photographed through the second light-transmitting area, and obtain a depth image of the surface of the object to be photographed according to the received spot pattern of the laser reflected by the object to be photographed. The depth image comprises depth information of different areas of the surface of the object to be photographed.
And the floodlight projector is used for projecting floodlight to the object to be shot through the third light transmission area according to a preset light intensity threshold value so as to illuminate. The preset illuminance threshold is any value from 10lux to 50lux, and preferably the preset illuminance threshold is 10lux.
Because the laser module 11 and the imaging module 12 are arranged on the backlight side of the black matrix area, a non-display area is not required to be arranged at the top of the display device to install the depth camera module, and the attractiveness and the overall screen experience of the display device cannot be influenced.
Moreover, since the laser module 11 and the imaging module 12 are both disposed on the backlight side of the display substrate 10, the arrangement and combination of the laser module 11 and the imaging module 12 have multiple possibilities, and the distance between the laser module 11 and the imaging module 12 can be increased on the premise of not affecting the beauty, so as to improve the shooting accuracy of the depth camera module, as shown in fig. 2, the laser module 11 and the imaging module 12 can be disposed in the black matrix areas on both sides, respectively.
Optionally, the light-transmitting area is provided with an infrared film layer; in some embodiments, the first light-transmitting area is provided with a first infrared film layer, the second light-transmitting area is provided with a second infrared film layer, and the third light-transmitting area is provided with a third infrared film layer;
the first lamp mirror 19 is used for enabling the divergent incident multiple beams of laser to be emitted in parallel or to be emitted nearly in parallel so as to enable the laser to penetrate through an infrared film layer and a light transmission area to irradiate on an object to be shot;
the imaging module 12 adopts an infrared camera, and is configured to receive infrared laser reflected by the object to be photographed through another infrared film layer and another light-transmitting area, and obtain a depth image of the surface of the object to be photographed according to the infrared laser;
and the floodlight projector is used for projecting floodlight to the object to be shot through the third infrared film layer and the third light transmission area when the illuminance is lower than a preset illuminance threshold value so as to illuminate.
Optionally, as shown in fig. 3, 6, 10, the laser module includes a beam splitting device between the structured light projector and the projection lens;
the structured light projector adopts a laser array 1101 for projecting dot matrix laser;
the light splitting device 13 is located on the light emitting side of the laser array 1101, and is configured to split the lattice laser emitted by the structured light projector into a plurality of randomly distributed laser beams.
That is, in the embodiment of the present invention, the display substrate 10 may be a glass substrate, and the inner screen 40 of the display device is located inside the display substrate 10.
In some embodiments, the floodlight source comprises a diffusion sheet, a light splitting device and a laser array;
the laser array 1101 is used for projecting dot matrix laser;
the light splitting device 13 is located on the light emitting side of the laser array, and is configured to split the lattice laser projected by the laser array into multiple discretely distributed laser beams.
The diffusion sheet 21 is disposed on the light exit side of the light splitter, and is configured to diffuse the multiple laser beams and make the multiple laser beams flood and exit onto the projection lens 16.
That is, in the embodiment of the present invention, the display substrate 10 may be a glass substrate, and the inner screen 40 of the display device is located inside the display substrate 10.
In the embodiment of the present invention, as shown in fig. 8 and 9, the depth camera module includes a driving circuit 14 connected to the laser module 11 and the imaging module 12. The driving circuit 14 is configured to control the laser module 11 and the imaging module 12 to be turned on or off simultaneously, and control the output optical power of the laser module 11 by controlling the driving current of the laser module 11, so as to control the optical power of the laser passing through a light-transmitting area by controlling the output optical power of the laser module 11.
Furthermore, the depth camera module further comprises a processing module 15,3D and a 2D imaging module. The 2D imaging module is used for shooting a 2D image of an object to be shot. The processing module 15 is used for obtaining a 3D image of the object to be shot according to the depth image shot by the 3D camera module and the 2D image shot by the 2D imaging module.
It should be noted that, in order to set the depth camera module on the backlight side of the display substrate 10, the driving circuit 14 may increase the driving current, reduce the pulse width of the laser module 11, and greatly increase the optical power of the laser module 11, while the total pulse energy of the laser module 11 is kept unchanged, so as to meet the optical power limitation of human eye safety.
In one embodiment of the present invention, as shown in fig. 4, 7, 11, the structured light projector includes an edge-emitting laser 1102 between the laser module and the projection lens, a collimating lens 18, a reflecting device 17, and a light splitting device 13; a collimating lens 18 and a reflecting device 17 are arranged between the light splitting device 13 and the laser module 11;
the edge-emitting laser 1102 is configured to project laser light to the collimator lens;
the collimating lens 18 is located on the light exit side of the edge-emitting laser 1102, and is configured to collimate the incident laser light and emit a collimated light beam;
the reflecting device 17 is located on the light-emitting side of the collimating lens 18, and is configured to fold the collimated light beam and project the collimated light beam to the light splitting device 13;
the light splitting device 13 is located on the light-emitting side of the reflecting device 17, and is configured to split the collimated light beam projected by the reflecting device 17 into multiple laser beams which are randomly distributed.
Specifically, the light splitting device 13 divides the laser light emitted by the edge-emitting laser 1102 into a plurality of laser light which are randomly distributed, and when the laser light is irradiated on a plane, a light spot image as shown in fig. 14 is formed, when the plurality of laser light is irradiated on an object to be photographed, the light spot pattern is deformed or displaced, and after the first imaging module photographs the light spot pattern on the surface of the object to be photographed, a depth image of the surface of the object to be photographed is obtained according to the deformation or displacement of the light spot pattern, that is, the depth information of the surface of the object to be photographed is obtained. The processing module 15 can obtain a 3D image of the object to be photographed according to the depth image and the 2D image.
In the embodiment of the present invention, the reflecting device 17 may adopt a mirror or a triangular prism. The reflecting surface of the triangular prism can be plated with a layer of reflecting film.
The imaging module 12 is a first imaging module, and optionally, the first imaging module is an infrared camera. The first imaging module 12 obtains a depth image of the surface of the object to be photographed according to the received spot pattern of the laser reflected by the object to be photographed.
In some embodiments, the floodlight source includes an edge-emitting laser 1102, a collimating lens 18, a reflecting device 17, a light splitting device 13, and a diffusion sheet 21;
the edge-emitting laser 1102 is configured to emit laser light;
the collimating lens 18 is located on the light emitting side of the edge-emitting laser, and is configured to collimate the incident laser and emit a collimated light beam;
the reflecting device 17 is located on the light-emitting side of the collimating lens and is used for reflecting the collimated light beam and projecting the collimated light beam to the light splitting device;
the light splitting device 13 is located on the light emitting side of the reflecting device and is used for splitting the laser light projected by the reflecting device into a plurality of laser beams;
the diffusion sheet 21 is disposed on the light exit side of the light splitter, and is configured to diffuse the multiple laser beams and enable the multiple laser beams to be emitted to the projection lens in a floodlight manner.
In the embodiment of the present invention, as shown in fig. 5, 6, and 7, the imaging module 12 includes a second lamp mirror 1201, a receiving lens 1202, and a photo detector array 1203; the photo-detector array 1203 comprises a plurality of photo-detectors distributed in an array;
the second light mirror 1201 is used for receiving the laser reflected by the object to be shot through another light transmission area, and after the laser is contracted to the narrowest position at the diaphragm, the laser is divergently projected to the receiving lens;
the receiving lens 1202 is configured to converge parallel laser beams incident at the same angle on an upper photodetector located on a focal plane of the receiving lens;
the optical detector is used for receiving the laser to generate a light spot pattern and obtaining a depth image of the surface of the object to be shot according to the light spot pattern.
In the embodiment of the invention, the light detector can adopt a CMOS or CCD sensor.
Fig. 12 is a schematic structural diagram of a projection lens according to an embodiment of the present invention, and fig. 13 is another schematic structural diagram of a projection lens according to an embodiment of the present invention, as shown in fig. 12 and 13, the projection lens includes a lens assembly 16 and a first lamp lens 19; the structured light projector is used for projecting structured light to the projection lens, and the structured light comprises a plurality of beams of laser light which are distributed randomly; the lens assembly 16 is configured to converge the multiple laser beams and then irradiate the multiple laser beams to the light incident surface of the first lamp mirror 19; the first lamp mirror 19 is used for enabling the incident multiple laser beams to be emitted in parallel or approximately emitted in parallel so as to enable the laser beams to irradiate an object to be shot through a light transmission area;
in the embodiment of the present invention, the angle between the two nearly parallel laser beams is smaller than a preset angle threshold, and the angle threshold may be set to 5 °. The multiple laser beams are parallel, namely multiple laser beams form multiple groups of laser beams, and the multiple laser beams in each group of laser beams are parallel to each other.
In the embodiment of the present invention, the lens assembly 16 includes a first lens 1601, a second lens 1602, and a lens barrel 1604; the first lens 1601 and the second lens 1602 are arranged on the light inlet side of the lens barrel; the first lamp lens 19 is arranged on the light-emitting side of the lens barrel; the first lens 1601 is configured to converge the plurality of laser beams and project the converged laser beams to the second lens; the second lens 1602 is configured to converge the multiple laser beams projected by the first lens again and project the multiple laser beams to the light incident surface of the first lamp mirror. The lens barrel 1604 is used for assembling and fixing the first lens 1601, the second lens 1602 and the first lamp lens 19 into a whole. A concave light inlet is arranged on the light inlet side of the first lamp mirror 19; the bottom surface of the light inlet is a light inlet surface; the light incident surface is a convex surface; and the diaphragm of the projection lens is arranged on the convex surface. The light incident surface is used for enabling the incident multiple laser beams to be emitted in parallel or approximately emitted in parallel so as to form an image at a specified distance from infinity or a distance.
In the embodiment of the invention, because the depth camera module is arranged under the narrow gap for emitting light, the position of the diaphragm, namely the position of the narrowest light beam, is the position in the middle of the height of the narrow gap, the lens can reach the largest angle of field under the condition that the upper side and the lower side can not shield the light.
When the projection lens is located on the backlight side of the display substrate 10, a first lamp mirror 19 needs to be filled between the lens assembly 16 and the display substrate 10. Since the area available for light transmission is smaller in size, the convergence point of the light rays of the projection lens, that is, the diaphragm, needs to be placed at the position of the first lamp lens 19, and then the diameter size of the projection lens needs to be larger, so that the emergent light rays with a certain angle can be converged at a specified position after being transmitted for a certain distance. The lower surface of the first lamp mirror 19 is made into a convex surface, and the diaphragm of the projection lens is placed on the convex surface, so that the first lamp mirror 19 can bear part of focal power, which is equivalent to a convex lens, the angle of emergent light rays from the lens below the first lamp mirror 19 is reduced, the effective caliber of the projection lens can be reduced, and the size of the whole system is reduced.
In the embodiment of the present invention, the upper surface of the first lamp lens 19 is tightly attached to the lower surface of the display substrate 10, the boss structure on the upper portion of the first lamp lens 19 is tightly attached to the lower surface of the inner screen 40, and the lower edge of the first lamp lens 19 is tightly attached to the projection lens barrel, which is convenient for assembly and testing.
A spacer is disposed between the first lens 1601 and the second lens 1602, and the spacer 1603 is used to fix the relative position between the first lens 2 and the second lens 4.
In the embodiment of the invention, a boss structure is arranged on the light emergent side of the first lamp mirror; the end face of the boss structure is a light-emitting face. The first lens 1601 and the second lens 1602 adopt convex lenses. The light incident side surface of the first lamp mirror 19 is attached to the second lens 1602. The first lamp lens 19 is made of optical plastic materials, and can not only realize the function of bearing focal power, but also realize the dustproof function between the projection lens and the display substrate 10.
In the modified example of the present invention, the lens barrel 1604 is provided with a bulkhead 1605; the second lens 1602 is disposed on one side of the bezel 1605, and the lens barrel 1604 is disposed on the other side of the bezel 1605.
In the embodiment of the present invention, the light incident from the first lens 1601 may be projected by any light projector, such as a structured light projector, an edge emitting laser, to project a pattern. The structured light emitted by the light projector can be a plurality of parallel telecentric beams or beams with the chief rays having certain angles.
In the embodiment of the present invention, the light splitter 13 may be a waveguide device, a nano-photonic chip, or a diffraction grating (DOE) or a photomask with a code structure, and the present invention is not limited thereto.
The embodiment of the invention also provides electronic equipment, which comprises the display device provided by any one of the embodiments, and the electronic equipment can be a mobile phone, a tablet computer, a digital camera and the like. According to the electronic equipment with the 3D camera module, the depth camera module is not required to be installed in the non-display area arranged at the top of the display device, the appearance is more attractive, and the full-screen experience is more favorably realized.
In the embodiment of the invention, light rays are converged on the first lamp lens through the first lens and the second lens of the lens component, and the diaphragm is positioned on the light incident surface of the first lamp lens, so that the depth camera module with the projection lens is suitable for being installed in a narrow gap without being shielded by an FOV (field of view), thus the application of the invention on a narrow-frame screen (a narrow screen with a black matrix area) is realized, and the first lamp lens can be tightly attached to a mobile phone glass cover plate to play a dustproof role; according to the display device and the electronic equipment with the 3D camera module, the depth camera module is arranged on the backlight side of the black matrix area of the display substrate, so that a non-display area, namely a sea area, does not need to be arranged at the top of the display device, the depth camera module is installed, and the attractiveness and the comprehensive screen experience of the display device cannot be influenced; according to the embodiment of the invention, the infrared film layer is arranged in the light-transmitting area of the black matrix area, the infrared film layer can transmit infrared light so as not to influence the work of the depth camera module, but visible light cannot pass through the infrared film layer, so that the integrity of the black matrix area is ensured, and the attractiveness of a display screen is not influenced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (10)

1. A display device with a 3D camera module is characterized by comprising a display substrate and the 3D camera module;
the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes at least two light transmissive regions;
the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module and an imaging module;
the laser module comprises a structured light projector and a projection lens; the projection lens comprises a lens component and a first lamp mirror; the structured light projector is used for projecting structured light to the lens component, and the structured light comprises a plurality of laser beams which are distributed randomly; the lens assembly is used for converging the multiple laser beams and then enabling the multiple laser beams to enter the light inlet surface of the first lamp mirror; the first lamp mirror is used for enabling the incident multiple beams of laser to irradiate an object to be shot through a light-transmitting area;
the imaging module is used for receiving the laser reflected by the object to be shot through the other light-transmitting area and obtaining a depth image of the surface of the object to be shot according to the received spot pattern of the laser reflected by the object to be shot.
2. The display device according to claim 1, wherein the light-transmitting region is provided with an infrared film layer;
the first lamp mirror is used for enabling the plurality of beams of infrared laser emitted by divergent incidence to penetrate through an infrared film layer and a light transmission area to irradiate on an object to be shot;
the imaging module is used for receiving the infrared laser reflected by the object to be shot through another infrared film layer and another light-transmitting area and obtaining a depth image of the surface of the object to be shot according to the infrared laser.
3. The display device according to claim 1, wherein the lens assembly includes a first lens, a second lens, and a lens barrel;
the first lens and the second lens are arranged on the light incident side of the lens barrel; the first lamp mirror is arranged on the light emergent side of the lens barrel;
the first lens is used for converging the laser beams and then projecting the laser beams to the second lens;
the second lens is used for converging the laser beams projected by the first lens again and then projecting the laser beams to the light inlet surface of the first lamp mirror.
4. A display device with a 3D camera module is characterized by comprising a display substrate and the 3D camera module;
the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes a first light-transmitting region, a second light-transmitting region and a third light-transmitting region;
the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module and an imaging module;
the laser module comprises a floodlight projector, a structured light projector and a projection lens; the projection lens comprises a lens component and a lamp mirror; the structured light projector is used for projecting structured light to the lens assembly, and the structured light comprises a plurality of laser beams which are distributed randomly; the lens assembly is used for converging the multiple laser beams and then enabling the multiple laser beams to enter the light incident surface of the lamp mirror; the lamp mirror is used for enabling the incident multiple laser beams to irradiate an object to be shot through the first light transmission area;
the imaging module is used for receiving the laser reflected by the object to be shot through the second light-transmitting area and obtaining a depth image of the surface of the object to be shot according to the received spot pattern of the laser reflected by the object to be shot;
and the floodlight projector is used for projecting floodlight to the object to be shot through the third light transmission area according to a preset light intensity threshold value so as to illuminate.
5. The display device according to claim 4, wherein the first light-transmitting region is provided with a first infrared film layer, wherein the second light-transmitting region is provided with a second infrared film layer, and wherein the third light-transmitting region is provided with a third infrared film layer;
the lamp mirror is used for enabling the plurality of beams of infrared laser which are divergently incident to penetrate through the first infrared film layer and the first light transmission area to irradiate on an object to be shot;
the imaging module is used for receiving the infrared laser reflected by the object to be shot through another second infrared film layer and a second light transmission area and obtaining a depth image of the surface of the object to be shot according to the infrared laser;
and the floodlight projector is used for projecting floodlight to the object to be shot through the third infrared film layer and the third light transmission area when the illuminance is lower than a preset illuminance threshold value so as to illuminate.
6. The display device according to claim 4, wherein the lens assembly includes a first lens, a second lens, and a lens barrel;
the first lens and the second lens are sequentially arranged on the light incident side of the lens barrel; the lamp mirror is arranged on the light-emitting side of the lens barrel;
the first lens is used for converging the laser beams and then projecting the laser beams to the second lens;
the second lens is used for converging the laser beams projected by the first lens again and then projecting the laser beams to the light inlet surface of the lamp mirror.
7. A display device with a 3D camera module is characterized by comprising a display substrate and the 3D camera module;
the display substrate comprises a display area and a black matrix area surrounding the display area; the black matrix region includes at least two light transmissive regions;
the 3D camera module comprises a depth camera module positioned on the backlight side of the black matrix area; the depth camera module comprises a laser module and an imaging module;
the laser module comprises a floodlight source and a projection lens; the projection lens comprises a lens component and a first lamp mirror; the floodlight source is used for emitting floodlight; the lens assembly is used for enabling the floodlight to be incident to the light incident surface of the first light mirror after being converged; the first lamp mirror is used for enabling the incident floodlight to irradiate on an object to be shot through a light transmission area;
and the imaging module is used for receiving floodlight reflected by the object to be shot through another light transmission area and obtaining a depth image of the surface of the object to be shot according to the time delay or the phase difference of the floodlight.
8. The display device according to claim 7, wherein the light-transmitting region is provided with an infrared film layer;
the first lamp mirror is used for enabling the flood light which is divergently incident to penetrate through an infrared film layer and a light transmission area to irradiate on an object to be shot;
and the imaging module is used for receiving floodlight reflected by the object to be shot through another infrared film layer and another light transmission area and obtaining a depth image of the surface of the object to be shot according to the floodlight.
9. The display device according to claim 7, wherein the lens assembly includes a first lens, a second lens, and a lens barrel;
the first lens and the second lens are sequentially arranged on the light incident side of the lens barrel; the first lamp mirror is arranged on the light emergent side of the lens barrel;
the first lens is used for projecting the floodlight to the second lens after being converged;
and the second lens is used for converging the floodlight projected by the first lens again and projecting the floodlight to the light incident surface of the first light mirror.
10. An electronic device comprising the display device according to any one of claims 1 to 9.
CN202210003172.9A 2021-06-17 2022-04-12 Display device and electronic equipment with 3D camera module Active CN115499639B (en)

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