CN108469704B - Hide in light emitting module of cell-phone screen below - Google Patents
Hide in light emitting module of cell-phone screen below Download PDFInfo
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- CN108469704B CN108469704B CN201810425184.4A CN201810425184A CN108469704B CN 108469704 B CN108469704 B CN 108469704B CN 201810425184 A CN201810425184 A CN 201810425184A CN 108469704 B CN108469704 B CN 108469704B
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- 238000003384 imaging method Methods 0.000 claims abstract description 53
- 239000011521 glass Substances 0.000 claims abstract description 31
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims description 31
- 230000001788 irregular Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 238000003331 infrared imaging Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000005286 illumination Methods 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 206010027146 Melanoderma Diseases 0.000 description 3
- 238000012634 optical imaging Methods 0.000 description 3
- 230000001795 light effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Stroboscope Apparatuses (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a light-emitting module hidden below a mobile phone screen, which comprises a screen component and a miniature backlight illumination system arranged below the screen component, wherein the screen component comprises a glass cover plate, an LCD (liquid crystal display) screen arranged below the glass cover plate, and a light guide plate arranged below the LCD screen and used for illuminating the LCD screen, wherein a second through hole is formed in the middle of the light guide plate, and can be arranged below the light guide component as required to realize a light-emitting effect, and an imaging system can be arranged below the light guide component to realize a flash and imaging integrated function. The invention has simple structure, low cost, long service life and good reliability, can eliminate black spots on the display screen caused by the holes of the light guide plate, can be used for common LCD touch display screens, and can be used for under-screen light-emitting modules such as flash lamps, iris recognition or 3D imaging structured light.
Description
Technical Field
The present invention relates to a flashlight module, and more particularly, to a light emitting module hidden under a mobile phone screen.
Background
When people use cameras or video cameras to shoot, people often are in the condition of night or poor ambient light effect, and therefore auxiliary equipment is usually required to be equipped to enhance the light effect, and a flash lamp is used as a common light reinforcement device and has been widely applied to shooting arts. Along with the improvement of the requirements of users on photographic effects, the requirements on flash lamps in photographic equipment are correspondingly improved, and the flash lamp modules for mobile phones popular in the prior market are generally arranged to be visible to naked eyes, so that the attractiveness of the mobile phones is affected, particularly, the front-mounted cameras are generally in a flash addition image structure, and thus the front-mounted screen of the mobile phones can be provided with obvious two image pickup components.
As face or iris recognition mobile phones are increasingly popular, holes are required while face or iris recognition cameras are increased, so that people can see one more hole than a mobile phone without the face or iris recognition function. However, the mobile phone user often does not want to see that the mobile phone has too many holes, and because the holes added on the face or iris recognition mobile phone are visible to the naked eyes, and further, the position design of the newly added holes is not easy to meet the appearance requirement of the user, the difficulty of the appearance design of the mobile phone is increased, and meanwhile, the experience effect of the user on the face or iris recognition mobile phone is seriously affected.
In addition, the Chinese patent application with the application number 201610804827.7 discloses a glass cover plate of a face or iris recognition mobile phone and the mobile phone, and the mobile phone comprises the glass cover plate, wherein a coating film is arranged at the position of the glass cover plate corresponding to an iris camera, the coating film can transmit invisible light required by the iris camera, and the color presented by the coating film is the same as that of the glass cover plate. The glass cover plate of the face or iris recognition mobile phone avoids the increased macroscopic open pores on the face or iris recognition mobile phone, and the coating film is consistent with the color of the glass cover plate of the mobile phone, so that the appearance is the same as that of the iris-free camera, and the difficulty of the appearance design of the mobile phone is reduced.
However, the colored coating film is arranged on the glass cover plate, so that chromatic aberration is easily formed at different temperatures or illumination, the technical requirement on the coating film is high, and the production and the preparation are inconvenient.
At present, a common LCD display screen is generally adopted for a mobile phone screen, and then, as a light guide plate (a certain microstructure on the lower bottom surface of the light guide plate) of a backlight module for illuminating the display screen can generate light blocking for a pattern recognition module below, a hole needs to be formed in the position of the light guide plate right above a fingerprint recognition optical imaging module, so that light rays of the lower epidermis of the fingerprint can pass through the backlight module and can be imaged and recognized through an imaging lens below. Then a distinct black spot appears on the display screen because the light guide plate aperture location cannot illuminate the LCD screen directly above.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the light-emitting module hidden under the mobile phone screen, which has low cost, long service life and good reliability, can eliminate black spots on the display screen caused by the holes of the light guide plate, can be used for a common LCD touch display screen, can realize the integration of flash and imaging, and can be used for a flash lamp, iris recognition or 3D imaging structured light and other screen light-emitting modules.
In order to achieve the above-mentioned objective, the present invention provides a light emitting module hidden under a mobile phone screen, which comprises a screen member, a micro backlight illumination system installed under the screen member, wherein the micro backlight illumination system comprises a light guide member for adjusting light, a first light emitting member installed on the side of the light guide member for generating light, the screen member comprises a glass cover plate, an LCD liquid crystal display screen installed under the glass cover plate, a light guide plate installed under the LCD liquid crystal display screen for illuminating the LCD liquid crystal display screen, a second through hole is provided in the middle of the light guide plate, the light guide plate is installed above the light guide member, the light guide member comprises a horn mouth arranged in the middle position of the top for limiting the view angle or light transmission of the lens member and a reflecting structure for reflecting the light, the reflecting structure is independently arranged at the bottom of the light guide member or is arranged at the bottom of the light guide member and integrally formed with the light guide member, and the reflecting structure comprises a total reflecting surface inclined from the inside to the outside.
Preferably, the total reflection surface includes a plurality of micro inclined reflection surfaces, and the inclination angle of the micro inclined reflection surfaces is gradually decreased from the inner upper side to the outer lower side correspondingly to the total reflection surface.
Preferably, the light guide member further comprises a light distribution lens arranged below the light guide member, and the second light emitting member is arranged below the light distribution lens.
Preferably, the micro backlight illumination system further comprises a diffractive optical element mounted above the light guiding member.
Preferably, the second light emitting member is a laser diode or an IR LED infrared light source.
Preferably, a diffractive optical element is disposed in the middle of the light guide member.
Preferably, the system further comprises an imaging system arranged in the miniature backlight illumination system.
Preferably, the imaging system comprises a lens component for imaging, a shading sheet arranged above the lens component, an infrared filter arranged below the lens component, and an image sensor arranged below the infrared filter and used for receiving images, wherein the shading sheet is provided with a first through hole.
Preferably, the lens member is an optical lens member, and the optical lens member is an aspherical optical lens, a diffractive optical curved lens, or a fresnel curved lens.
Preferably, the light emitting member is an infrared LED, and the image sensor is an infrared imaging sensor.
Preferably, a high light reflecting component is arranged below the light guiding component, and the high light reflecting component is independently arranged below the light guiding component or is integrally formed with the light guiding component.
Preferably, the high light reflecting component can also comprise a microstructure for mixing light
The number of the lens members is preferably one, but may be two or more.
Preferably, the light guide member is circular, and may be elliptical, square, triangular, polygonal or irregular.
Preferably, the first light emitting component is a plurality of LED light sources, a plurality of laser light sources, a plurality of white LED light sources and IR LED infrared light source combinations or a plurality of white LED light sources and color LED light source combinations.
Compared with the prior art, the invention has the beneficial effects that:
The invention comprises a screen component, a miniature backlight illumination system arranged below the screen component, wherein the screen component comprises a glass cover plate, an LCD (liquid crystal display) screen arranged below the glass cover plate, a light guide plate arranged below the LCD screen and used for illuminating the LCD screen, a second through hole is formed in the middle of the light guide plate, the miniature backlight illumination system comprises a light guide component used for adjusting light, a first light emitting component arranged on the side surface of the light guide component and used for generating light, the light guide component comprises a horn mouth arranged at the middle position of the top and used for limiting the view angle of a lens component, and a reflecting structure arranged below the horn mouth, wherein the reflecting structure is a total reflection microstructure or a total reflection microstructure and refraction structure, a second light emitting component can be arranged below the light guide component as required to realize a light emitting effect, and an imaging system can also be arranged below the light guide component to realize a flash and imaging integrated function. The invention has simple structure, low cost, long service life and good reliability, can eliminate black spots on the display screen caused by the holes of the light guide plate, can be used for common LCD touch display screens, and can be used for under-screen light-emitting modules such as flash lamps, iris recognition or 3D imaging structured light.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a flashlight module hidden under a mobile phone screen and a screen member according to a first embodiment of the present invention;
Fig. 2 is an enlarged view of a portion a in fig. 1;
Fig. 3 is a schematic structural diagram of a flashlight module hidden under a mobile phone screen and matched with a screen member according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a flashlight module hidden under a mobile phone screen and matched with a screen member according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flashlight module hidden under a mobile phone screen and matching with a screen member according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram of a structure of an iris recognition module hidden under a mobile phone screen and cooperating with a screen member according to a fourth embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a light-emitting module hidden below a mobile phone screen.
Example 1
Referring to fig. 1 and 2, the present invention provides a flash module hidden under a mobile phone screen, including a screen member, a micro-backlight illumination system installed under the screen member, the screen member includes a glass cover plate 1410b, an LCD liquid crystal display screen 1420b installed under the glass cover plate 1410b, a light guide plate 1430b installed under the LCD liquid crystal display screen 1420b for illuminating the LCD liquid crystal display screen, a second through hole 1431b is opened in the middle of the light guide plate, the micro-backlight illumination system includes a light guide member 1440b for adjusting light, a light distribution lens 1460b installed under the light guide member 1440b, a second light emitting member 1480b installed under the light distribution lens 1460b, the second light emitting member 1480b is used for realizing a flash effect of the flash light, a first light emitting member 1490b installed on a side surface of the light guide member 1440b for generating light, the first light emitting member 1490b is used for illuminating the LCD liquid crystal display screen, the light guide member 1440b includes a light guide member 1440b installed in a middle position for adjusting light, the light guide member 1440b includes a horn shape, the light guide member 1440b is formed by a fully reflecting surface of the micro-horn shape, and the light guide member 1443 is formed by a fully reflecting surface, and the fully reflecting surface of the micro-reflecting surface 1442 is inclined along with the fully reflecting surface inclined from the top surface 1442.
The flare 1443b is an aperture stop of the second light emitting member 1480b, which allows the light emitted by the second light emitting member 1480b to sequentially pass through the light distribution lens 1460b, the second through hole 1431b, the lcd liquid crystal display 1420b, the glass cover 1410b, and finally be emitted from the glass cover surface 1411b into the field of view when the camera photographs.
The light distribution lens 1460b distributes light emitted by the second light emitting member 1480b below, the middle position of the bottom of the light distribution lens is provided with two shallower steps, the light of the light distribution lens is directly dispersed to form a beam angle of 2 omega with the optical axis Z 1Z2, the part of the bottom of the light distribution lens close to the outer ring is composed of a plurality of circles of deeper sawtooth-shaped annular rings, the light of the light distribution lens is converged towards the middle in a crossed light distribution mode, and then the light of the light distribution lens is dispersed to form a beam angle of 2 omega with the optical axis Z 1Z2. The beam angle of 2 omega covers the angle of view formed by the diagonal of the field of view when the camera takes a picture.
Example two
Referring to fig. 3, the invention provides a flash module hidden under a mobile phone screen, comprising a screen member, a micro backlight illumination system and an imaging system, wherein the micro backlight illumination system and the imaging system are arranged under the screen member, the screen member comprises a glass cover plate 1410, an LCD liquid crystal display screen 1420 arranged under the glass cover plate 1410, a light guide plate 1430 arranged under the LCD liquid crystal display screen 1420 and used for illuminating the LCD liquid crystal display screen 1420, a second through hole 1431 is arranged in the middle of the light guide plate 1430, the micro backlight illumination system comprises a light guide member 1440 used for adjusting light, a first light emitting member 1490 arranged on the side surface of the light guide member 1440 and used for generating light, the first light emitting member 1440 can be used as a flash, and meanwhile, the illumination lighting of the mobile phone screen is realized, the imaging system is installed below the light guiding member 1440, the imaging system includes a lens member 1460 for imaging, a light shielding sheet installed above the lens member 1460, an infrared filter 1470 installed below the lens member 1460, an image sensor 1780 installed below the infrared filter 1470 for receiving an image, the light shielding sheet is provided with a first through hole, the light guiding member 1440 includes a flare 1443 disposed in a middle position of a top for limiting an angle of view of the lens member 1460, a reflecting structure 1442 disposed below the flare 1443, the reflecting structure 1442 is a total reflection surface, the total reflection surface includes a plurality of micro inclined reflecting surfaces, and an inclined angle of the micro inclined reflecting surfaces gradually decreases from inside to outside along with the total reflection surface correspondingly.
The flare 1443 communicates with the first through hole of the light shielding sheet, and becomes an aperture stop of the lens member 1460, and the aperture stop allows imaging light to pass through the lens member 1460 to be imaged into the image sensor 1480 below the imaging light, and blocks light outside the angle of view from entering the lens member 1460.
The infrared filter is used to filter out infrared light, and only light with a wavelength of 380 nm-760 nm can pass through the infrared filter and be imaged into the image sensor 1480.
After the light emitted from the first light emitting member 1490 is totally reflected and distributed by the light guiding member side 1441 through the reflecting structure 1442 below the middle portion of the light guiding member 1440, the covered total angle of the output light forms 2 ω with the optical axis Z 1Z2, that is, the output light is uniformly distributed within the total angle 2 ω. The full angle 2ω just covers the maximum angle of view of the diagonal of the photographed image of the imaging lens module 1460, and the illuminance uniformity of the four corners reaches 40%.
The lens component 1460 is an image capturing lens module with a built-in screen, and consists of two aspheric plastic lenses, and can also be in other numbers, wherein the imaging distance is located far instead of the upper surface 1411 of the glass cover plate of the touch screen.
The embodiment also comprises an imaging system arranged below the miniature backlight illumination system, and the imaging system can achieve the functions of flash and imaging integration.
The lens member 1460 is an optical lens member, which is an aspherical optical lens, and may be a diffractive optical curved lens or a fresnel curved lens.
In this embodiment, the light guiding member 1440 is preferably circular, and may be elliptical, square, triangular, polygonal or irregular.
In this embodiment, the first light emitting component is a plurality of LED light sources, which may also be a plurality of laser light sources, a plurality of white LED light sources and IR LED light source combinations, or a plurality of white LED light sources and color LED light source combinations.
Example III
Referring to fig. 4, the present invention provides a 3D imaging structure optical module hidden under a mobile phone screen, including a screen member, a micro-backlight illumination system disposed under the screen member, the screen member includes a glass cover plate 1510b, an LCD liquid crystal display 1520b disposed under the glass cover plate 1510b, a light guide plate 1530b disposed under the LCD liquid crystal display 1520b for illuminating the LCD liquid crystal display, a second through hole 1531b is formed in the middle of the light guide plate, the micro-backlight illumination system includes a light guide member 1540b for adjusting light, a diffractive optical element 1550b disposed in the middle of the light guide member, a collimating lens 1560b disposed under the light guide member 1540b, a second light emitting member 1580b disposed under the collimating lens 1560b, the second light emitting member is a laser diode, the laser diode implements a flash function of the mobile phone, a first light emitting member 1590b disposed on the side of the light guide member 1540b for generating light, the first light emitting member is disposed in the middle of the light guide member for reflecting light, the first light emitting member is disposed in the middle of the light guide member, the light guide member is inclined to the top of the micro-reflecting structure of the mobile phone, and the micro-phone lens 1540b is formed to be inclined to the top of the reflecting structure of the micro-reflecting surface 2, and the micro-mirror structure is gradually reduced along with the angle of the top of the reflecting surface 1542b, and the reflecting surface is formed in the top of the light reflecting structure.
The bell mouth 1543b is an aperture stop of the second light-emitting component 1580b, which allows the light emitted by the second light-emitting component 1580b to sequentially pass through the collimating lens 1560b, the diffraction optical element 1550b, the second through hole 1531b, the lcd liquid crystal display 1520b, the glass cover 1510b, and finally be emitted from the glass cover surface 1511b into the field of view when the camera photographs.
The laser diode emits light which is balanced on the optical axis Z 1Z2 and is incident on the collimating lens 1560b, the diffraction optical element 1550b diffracts the semiconductor laser which is collimated by the collimating lens 1560b and forms a required structured light pattern after diffraction, and the structured light pattern irradiates the surface of an object for three-dimensional measurement.
The micro backlighting system is configured to supplement the black spot caused by the openings of the light guide plate 1530b of the LCD liquid crystal display 1520 b.
Example IV
Referring to fig. 5, the present invention provides a 3D imaging structure light module hidden under a mobile phone screen, comprising a screen member, a micro backlight illumination system and an imaging system installed under the screen member, wherein the screen member comprises a glass cover plate 1510, an LCD liquid crystal display 1520 installed under the glass cover plate 1510, a light guide plate 1530 installed under the LCD liquid crystal display 1520 and used for illuminating the LCD liquid crystal display 1520, a second through hole 1531 is provided in the middle of the light guide plate 1530, the micro backlight illumination system comprises a light guide member 1540 used for adjusting light, a first light emitting member 1590 installed on the side surface of the light guide member 1540 and used for generating light, the first light emitting member 1540 can be used as a flash lamp, and simultaneously realize illumination lighting for the mobile phone screen, the imaging system is installed below the light guiding member 1540, the imaging system includes a lens member 1560 for imaging, a light shielding sheet installed above the lens member 1560, an infrared filter 1570 installed below the lens member 1560, an image sensor 1580 installed below the infrared filter 1570 for receiving an image, a first through hole is formed in the light shielding sheet, the light guiding member 1540 includes a flare 1543 disposed at a top middle position for limiting a view angle of the lens member 1560, a reflecting structure 1542 is disposed below the flare 1543, the reflecting structure 1542 is a total reflection surface, the total reflection surface includes a plurality of micro inclined reflection surfaces, and an inclination angle of the micro inclined reflection surface gradually decreases from an inner upper portion to an outer lower portion correspondingly with the total reflection surface.
The flare 1543 communicates with the first through hole of the light shielding plate to form an aperture stop of the lens member 1560, and the aperture stop allows imaging light to pass through the lens member 1560 to be imaged into the image sensor 1580 thereunder, and blocks light outside the angle of view from entering the lens member 1560.
The infrared filter 1570 is configured to filter infrared light, and only light having a wavelength between 380nm and 760nm is allowed to pass through the infrared filter 1570 and be imaged into the image sensor 1580.
The light emitted from the first light emitting member 1590 is collimated by the reflecting structure 1542 tapered below the middle portion of the light guiding member 1540 from the side face 1541 of the light guiding member, and then is incident on the diffraction optical element 1550 in balance with the optical axis Z 1Z2, and the light incident after the collimation is diffracted by the diffraction optical element 1550b, and then a desired structured light pattern is formed and irradiated onto the surface of the object for three-dimensional measurement.
The lens member 1560 is a built-in image-capturing lens module, which is composed of three aspheric plastic lenses, and the imaging distance is located at a distance other than the upper surface 1511 of the touch screen glass cover plate. The imaging device images an object which is far irradiated by the structured light, and because the irradiated object is three-dimensional, the reflection patterns of the structured light are deformed differently at different positions, and the three-dimensional patterns of the object can be calculated through image processing according to the deformation condition of the patterns of the structured light.
The micro backlighting system is configured to supplement the black spot caused by the openings of the light guide plate 1530 of the LCD liquid crystal display 1520.
The lens member 1560 is a built-in image capturing lens module, which is composed of two aspheric plastic lenses, and can also be in other numbers, and the imaging distance is located far instead of the upper surface 1511 of the touch screen glass cover plate.
The embodiment also comprises an imaging system arranged below the miniature backlight illumination system, and the imaging system can realize the functions of flash and imaging integration.
The lens member 1560 is an optical lens member, which is an aspherical optical lens, and may be a diffractive optical curved lens or a fresnel curved lens.
In this embodiment, the light guiding member 1540 is preferably circular, and may be elliptical, square, triangular, polygonal or irregular.
Example five
Referring to fig. 6, the present invention provides a face or iris recognition module for a mobile phone under a screen, including a micro backlight illumination system and an imaging system installed in the micro backlight illumination system, the micro backlight illumination system includes a light guiding member 1640 for adjusting light, a first light emitting member 1690 installed on a side of the light guiding member 1640 for generating light, the first light emitting member 1690 is an infrared LED, the first light emitting member 1690 is a plurality of infrared LEDs, the imaging system includes an imaging lens 1660 for imaging, an image sensor 1680 installed above the imaging lens 1660, an image sensor 1680 installed below the imaging lens 1660 for receiving images, the image sensor 1680 is an infrared imaging sensor, the light shielding 1650 is provided with a first through hole, the imaging system images structural features of an iris, then performs image processing and feature analysis, the light guiding member 1640 includes a horn 1643 installed in a middle position at a top for limiting a viewing angle of the imaging lens 1660, a horn 1643 is installed below the light guiding member 1642, a reflective glass plate is installed below the light guiding member 1640, and is installed below the LCD panel 1631, and the LCD panel is installed below the LCD panel 1631.
The reflecting structure 1642 is a total reflecting surface, and the total reflecting surface includes a plurality of micro inclined reflecting surfaces, and the inclination angles of the micro inclined reflecting surfaces gradually decrease from the inner upper side to the outer lower side correspondingly with the total reflecting surface.
The human eye is located at the distance of about 2 cm-5 cm from the iris recognition module, the reflection structure irradiates the infrared light rays incident by the infrared LEDs 1690 to the position of the iris of the human eye to be illuminated, and the reflection light rays representing structural features of the iris of the human eye pass through small holes in the middle of the annular light guide member 1640 after the iris of the human eye is illuminated and enter a lower imaging system to be imaged.
In other embodiments, the annular saw tooth like microstructure on the reflective structure 1642 may be modified to be a transmissive step surface or the annular saw tooth like structure may be configured to include a vertical projection surface and a total reflection bevel.
In other embodiments, a high light reflection component may be further disposed below the light guiding member, where the high light reflection component is independently disposed below the light guiding member or integrally formed with the light guiding member.
In other embodiments, the high light reflecting component may further comprise microstructures for mixing light.
In this embodiment, the number of the imaging lenses is preferably one, but may be two or more.
In this embodiment, the imaging lens is an optical imaging lens, and the optical imaging lens is an aspherical optical lens, which may also be a diffractive optical curved lens or a fresnel curved lens.
In this embodiment, the light guiding member is circular, and of course, may be configured as an ellipse, a square, a triangle, a polygon or an irregular pattern according to actual needs.
In this embodiment, the first light emitting component is a plurality of LED light sources, which may also be a plurality of laser light sources, a plurality of white LED light sources and IR LED light source combinations, or a plurality of white LED light sources and color LED light source combinations.
In summary, the invention has simple structure, low cost, long service life and good reliability, can eliminate black spots on the display screen caused by the holes of the light guide plate, can be used for common LCD touch display screens, can realize the integration of flashing and imaging, and can be used for the under-screen luminous modules such as flash lamps, iris recognition or 3D imaging structured light.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (15)
1. The utility model provides a hide in the light emitting module of cell-phone screen below, includes screen component, installs in the miniature back light lighting system of screen component below, its characterized in that: the miniature backlight lighting system comprises a light guide member for adjusting light rays, a first light emitting member arranged on the side surface of the light guide member and used for generating the light rays, wherein the light guide member comprises a horn mouth arranged at the middle position of the top and used for limiting the view angle or light transmission of a lens member and a reflecting structure used for reflecting the light rays, the reflecting structure is independently arranged at the bottom of the light guide member or arranged at the bottom of the light guide member and integrally formed with the light guide member, the reflecting structure comprises a total reflecting surface inclined from the inner upper part to the outer lower part, the total reflecting surface comprises a plurality of miniature inclined reflecting surfaces, and the inclined angle of the miniature inclined reflecting surfaces gradually decreases from the inner upper part to the outer lower part along with the total reflecting surface correspondingly.
2. The light-emitting module of claim 1, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the light distribution lens is arranged below the light guide member, and the second light emitting member is arranged below the light distribution lens.
3. The light-emitting module of claim 2, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the miniature backlighting system further includes a diffractive optical element mounted over the light guide member.
4. A light emitting module hidden under a mobile phone screen according to claim 3, wherein: the second light emitting member is a laser diode or an IR LED infrared light source.
5. The light-emitting module of claim 4, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: a diffractive optical element is disposed in the middle of the light guide member.
6. The light-emitting module of claim 1, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: also included is an imaging system mounted within the miniature backlighting system.
7. The light-emitting module of claim 6, wherein the light-emitting module is hidden under a mobile phone screen, and further comprising: the imaging system comprises a lens component for imaging, a shading sheet arranged above the lens component, an infrared filter arranged below the lens component, and an image sensor arranged below the infrared filter and used for receiving images, wherein the shading sheet is provided with a first through hole.
8. The light-emitting module of claim 7, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the lens component is an optical lens component, and the optical lens component is an aspheric optical lens, a diffraction optical curved lens or a Fresnel curved lens.
9. The light-emitting module of claim 7, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the number of the lens components is one, two or more.
10. The light-emitting module of claim 1, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the light guide member is circular, elliptical, square, triangular, polygonal or irregular.
11. The light-emitting module of claim 1, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the first light-emitting component is a plurality of LED light sources, a plurality of laser light sources, a plurality of white light LED light sources and IR LED light source combinations or a plurality of white light LED light sources and color LED light source combinations.
12. The light-emitting module of claim 7, wherein the light-emitting module is hidden under a mobile phone screen, and is characterized in that: the light emitting component is an infrared LED, and the image sensor is an infrared imaging sensor.
13. The light-emitting module of claim 12, wherein the light-emitting module is hidden under a mobile phone screen, and further comprising: the high light reflection component is independently arranged below the light guide component or integrally formed with the light guide component.
14. The light-emitting module of claim 13, wherein the light-emitting module is hidden under a mobile phone screen, and further comprising: the high light reflecting component may further comprise a microstructure for mixing light.
15. A light emitting module hidden under a mobile phone screen according to any one of claims 1 to 14, wherein: the screen component comprises a glass cover plate, an LCD (liquid crystal display) screen arranged below the glass cover plate, and a light guide plate arranged below the LCD screen and used for illuminating the LCD screen, wherein a second through hole is formed in the middle of the light guide plate, and the light guide plate is arranged above the light guide component.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810425184.4A CN108469704B (en) | 2018-05-03 | 2018-05-03 | Hide in light emitting module of cell-phone screen below |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810425184.4A CN108469704B (en) | 2018-05-03 | 2018-05-03 | Hide in light emitting module of cell-phone screen below |
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| CN108469704A CN108469704A (en) | 2018-08-31 |
| CN108469704B true CN108469704B (en) | 2024-05-28 |
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