CN102375199A - Camera module - Google Patents

Camera module Download PDF

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Publication number
CN102375199A
CN102375199A CN2010102508814A CN201010250881A CN102375199A CN 102375199 A CN102375199 A CN 102375199A CN 2010102508814 A CN2010102508814 A CN 2010102508814A CN 201010250881 A CN201010250881 A CN 201010250881A CN 102375199 A CN102375199 A CN 102375199A
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CN
China
Prior art keywords
lens
light
camera module
liquid crystal
light hole
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Granted
Application number
CN2010102508814A
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Chinese (zh)
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CN102375199B (en
Inventor
张仁淙
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN201010250881.4A priority Critical patent/CN102375199B/en
Publication of CN102375199A publication Critical patent/CN102375199A/en
Application granted granted Critical
Publication of CN102375199B publication Critical patent/CN102375199B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention provides a camera module. The camera module comprises a first lens array, a second lens array, a liquid crystal shutter arranged between the first lens array and the second lens array, a controller, an image sensor and an image processor, wherein the first lens array comprises a plurality of first lens; the second lens array comprises a plurality of second lens which are respectively in optical alignment with the plurality of first lens one by one; the liquid crystal shutter is provided with a plurality of light-through holes; the plurality of transmission holes are respectively in optical alignment with the plurality of the first lens one by one; the controller is used for controlling every light-through hole of the liquid crystal shutter to open once in a shooting period; the image sensor is used for obtaining a sub-image corresponding to each light-through hole when each light-through hole in the shooting period is opened; and the image processor is used for synthesizing each sub-image corresponding to each light-through hole to an image by using a super-resolution image recovery technology.

Description

The camera module
Technical field
The present invention relates to a kind of camera module.
Background technology
Along with Development of Multimedia Technology, people are also increasingly high to the requirement of the camera module in the portable electron device, for example, to resolution require increasingly high.In order to improve the resolution of camera module, usually need increase optical mirror slip etc., thereby cause the optics length overall (Optical Total Track Length) of camera module to increase, and then cause the thickness of portable electron device to increase.Yet this runs counter to the compact requirement of portable electron device with people again.
Summary of the invention
In view of this, be necessary to provide a kind of resolution high, the camera module that thickness is little.
A kind of camera module comprises first lens arra, second lens arra, is arranged on liquid crystal shutter, controller, CIS and image processor between this first lens arra and this second lens arra.This first lens arra comprises a plurality of first lens.This second lens arra comprises a plurality of second lens, and these a plurality of second lens and this a plurality of first lens difference are optical alignment one by one.This liquid crystal shutter has a plurality of light holes, and these a plurality of light holes and this a plurality of first lens difference are optical alignment one by one.Controller was used in a shooting cycle, controlled each light hole of this liquid crystal shutter and opened once.CIS be used for one should be in the shooting cycle each light hole when opening, obtain a width of cloth sub-image corresponding with each light hole.Image processor is used to adopt each width of cloth sub-image that the super-resolution image recovery technique will be corresponding with each light hole to synthesize a width of cloth image.
With respect to prior art, the present invention adopts first lens arra, second lens arra and liquid crystal shutter to obtain the sub-image of low resolution, adopts the super-resolution image recovery technique that each sub-image is synthesized high-resolution image again.Because the requirement to the resolution of sub-image is lower, thus optics length overall can be shortened to the camera module that forms sub-image, so the thickness of camera module can be less.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the camera module of first embodiment of the invention.
Fig. 2 is the diagrammatic cross-section of the complex optics in the camera module of Fig. 1.
Fig. 3 is the complex optics vertical view of Fig. 2.
Fig. 4 is the top electrode of the liquid crystal shutter in the camera module of Fig. 1, the synoptic diagram that bottom electrode is connected with controller.
The main element symbol description
Camera module 100
Complex optics 10
CIS 20
Circuit board 30
Image processor 40
Controller 50
Tin ball 22
Picture frame 101
Second lens 102
Upper substrate 103
Second lens arra 104
First lens 105,105a, 105b, 105c, 105d
Liquid crystal shutter 106
First lens arra 107
Alignment mark 108
Infrabasal plate 109
Last polaroid 1061
Last light shield layer 1062
End electrode 1063
Liquid crystal layer 1064
Bottom electrode 1065
Following light shield layer 1066
Following polaroid 1067
Light hole 1068
Last light hole 10624
Following light hole 10664
Registration holes 10622
Conductive region 10631,10651
Connecting portion 10633
Pin 10635,10653
Embodiment
To combine accompanying drawing and embodiment that the present technique scheme is done further explain below.
See also Fig. 1, preferred embodiment of the present invention provides a kind of camera module 100.Camera module 100 comprises complex optics 10, controller 50, CIS 20, image processor 40 and circuit board 30.CIS 20 is welded on the circuit board 30 through tin ball 22.Image processor 40 is arranged on the circuit board 30.CIS 20 electrically connects with controller 50, image processor 40 respectively.
See also Fig. 2 and Fig. 3, complex optics 10 comprises picture frame 101, upper substrate 103, infrabasal plate 109, be formed on upper substrate 103 first lens arra 107, be formed on second lens arra 104 on the infrabasal plate 109 and be folded in upper substrate 103 and infrabasal plate 109 between liquid crystal shutter 106.
Picture frame 101 is roughly square on xsect.Picture frame 101 comprises four interconnective sidewalls.The sidewall of picture frame 101 is enclosed a receiving space that is roughly rectangular parallelepiped, and receiving space is used to accommodate upper substrate 103, infrabasal plate 109, first lens arra 107, second lens arra 104 and liquid crystal shutter 106.The bottom of picture frame 101 offers a light hole, and light hole and receiving space connect.
The bottom of upper substrate 103 offers first groove, and the top of infrabasal plate 109 offers second groove, when upper substrate 103 and infrabasal plate 109 are superimposed, and the host cavity of a ccontaining liquid crystal shutter 106 of the common formation of first groove and second groove.
In the present embodiment, first lens arra 107 comprises four first lens 105a, 105b, 105c, 105d (following need not distinguish time, be referred to as 105), and four first lens 105 are arranged with the array way of two row, two row.Align each other in the center of first lens 105 of every row, the center of first lens 105 of every row is alignment each other also.Four first lens 105 are equal basically along the area of its optical axis orthogonal projection separately.Second lens arra 104 comprises that 102, four second lens 102 of four second lens arrange with the array way of two row two row.Align each other in the center of second lens 102 of every row, the center of second lens 102 of every row is alignment each other also.Four second lens 102 are equal basically along the area of its optical axis orthogonal projection separately.Four first lens 105 and four second lens 102 are corresponding one by one, each first lens 105 and the optical axis coincidence of second lens 102 of correspondence with it.Each first lens 105 is substantially equal to the area of each second lens 102 along its optical axis orthogonal projection along the area of its optical axis orthogonal projection.
In the present embodiment, upper substrate 103 and first lens arra 107, infrabasal plate 109 and second lens arra 104 are respectively one-body molded.Be appreciated that the upper substrate 103 and first lens arra 107 also can be independent moulding, the infrabasal plate 109 and second lens arra 104 also can be independent moulding.
Liquid crystal shutter 106 has four light holes 1068 of arranging with array way.Four light holes 1068 and four first lens 105, four second lens 102 are corresponding one by one.Whether each light hole 1068 can optionally opened or close to liquid crystal shutter 106, allow light to pass through first lens 105, second lens 102 with decision.Each light hole 1068 is roughly rounded.The area of each light hole 1068 is substantially equal to the area of first lens 105 along its optical axis orthogonal projection.
From the direction of upper substrate 103 to infrabasal plate 109, liquid crystal shutter 106 comprises polaroid 1061, last light shield layer 1062, top electrode 1063, liquid crystal layer 1064, bottom electrode 1065, following light shield layer 1066, following polaroid 1067 successively.
Please consult Fig. 3 in the lump, last light shield layer 1062 can be processed by light screening materials such as chromium.Last light shield layer 1062 offers four and is roughly circular last light hole 10624.Four to go up light hole 10624 corresponding one by one with four first lens 105, four second lens 102 respectively.The area of light hole 10624 is substantially equal to the area of first lens 105 along its optical axis orthogonal projection on each.
Top electrode 1063 is common electrode (Common Electrode), and top electrode 1063 comprises the conductive region 10631 of four circular, the connecting portion 10633 that connects above-mentioned four conductive regions 10631 and the pin 10635 that is connected with connecting portion 10633.Top electrode 1063 electrically connects with controller 50.Top electrode 1063 is a transparency electrode, its material can be indium tin oxide conductive film (Indium Tin Oxide, ITO) or transparent conductive material such as carbon nano-tube film.Four conductive regions 10631 respectively with four first lens 105, corresponding one by one.The area of each conductive region 10631 is substantially equal to the area of first lens 105 along its optical axis orthogonal projection.
The 1064 employing reaction time of liquid crystal layer are liquid crystal material faster, and for example the reaction time reaches several milliseconds liquid crystal material.In the present embodiment, liquid crystal layer 1064 is ferroelectric liquid crystal material (Ferroelectric Liquid Crystal).
Bottom electrode 1065 comprises that four are roughly circular conductive region 10651 and four pins 10653 that link to each other with conductive region 10651 respectively.The pin 10653 of bottom electrode 1065 all is electrical connected with controller 50.Bottom electrode 1065 is a transparency electrode, its material can be indium tin oxide conductive film (Indium Tin Oxide, ITO) or transparent conductive material such as carbon nano-tube film.Four conductive regions 10651 are corresponding one by one with four first lens 105, four second lens 102 respectively.The area of each conductive region 10651 is substantially equal to the area of second lens 102 along its optical axis orthogonal projection.
Following light shield layer 1065 can be processed by light screening materials such as chromium.Following light shield layer 1065 offers four and is roughly circular following light hole 10664.Four following light holes 10664 are corresponding one by one with four first lens 105, four second lens 102 respectively.The area of light hole 10664 is substantially equal to the area of second lens 102 along its optical axis orthogonal projection under each.Go up light hole 10624 and four following light hole 10664 coaxial settings respectively for four, go up light hole 10624 for one and descend light hole 10664 light hole 1068 of formation jointly with it accordingly with one.
Further, the middle position of upper substrate 103 can be provided with an alignment mark 108, and in the present embodiment, alignment mark 108 is " ten " font alignment marks.Correspondingly; The middle position of infrabasal plate 109 also is provided with an alignment mark (figure does not show); The middle position of last light shield layer 1062 and following light shield layer 1066 all offers a registration holes 10622; Thereby when upper substrate 103 and infrabasal plate 109 are fitted together, can realize accurate contraposition through alignment mark 108.
Controller 50 was used in a shooting cycle, controlled each light hole 1068 of this liquid crystal shutter 106 and opened once.Controller 50 is added in the voltage between top electrode 1063 and the bottom electrode 1065 through control, and the arrangement of the liquid crystal molecule of liquid crystal layer 1064 is changed, thus the opening and closing of independent each light hole 1068 of control.In the present embodiment, controller 50 each light hole 1068 of control are opened successively, and only open a light hole 1068 at one time.And when each light hole 1068 was opened, controller 50 synchro control CISs 20 obtained the corresponding sub-image of a width of cloth and this light hole 1068.
CIS 20 is used for each light hole 1068 in a shooting cycle when opening, and obtains a width of cloth sub-image corresponding with each light hole 1068.
Image processor 40 is used to adopt super-resolution image recovery technique (Super-Resolution Image Reconstruction) in a shooting cycle, to synthesize a width of cloth image with each light hole 1068 each corresponding width of cloth sub-image.
In use, controller 50 changes the arrangement of the liquid crystal molecule of liquid crystal layer 1064, thereby opens each light hole 1068 of liquid crystal shutter 106 successively through the voltage between control top electrode 1063 and the bottom electrode 1065.When each light hole 1068 is opened; Controller 50 synchro control CISs 20 obtain a width of cloth sub-image; After having obtained four width of cloth sub-images; Image processor 40 adopts the super-resolution image recovery technique that four width of cloth sub-images are synthetic, thereby obtains all high high-resolution image of resolution of each width of cloth sub-image of an amplitude ratio.
More specifically, in time T 1, controller 50 is only opened and the corresponding light hole 1068 of the first lens 105a, and controller 50 synchro control CISs 20 obtain the sub-image P1 that is formed by the first lens 105a and corresponding second lens 102; In time T 2, controller 50 is only opened and the corresponding light hole 1068 of the first lens 105b, and controller 50 synchro control CISs 20 obtain the sub-image P2 that is formed by the first lens 105b and corresponding second lens 102; In time T 3, controller 50 is only opened and the corresponding light hole 1068 of the first lens 105c, and controller 50 synchro control CISs 20 obtain the sub-image P3 that is formed by the first lens 105c and corresponding second lens 102; In time T 4, controller 50 is only opened and the corresponding light hole 1068 of the first lens 105d, and controller 50 synchro control CISs 20 obtain the sub-image P4 that is formed by the first lens 105d and corresponding second lens 102.At last, image processor 40 adopts the super-resolution image recovery technique that four width of cloth sub-image P1-P4 are synthetic, thereby obtains the image P of a panel height resolution.
With respect to prior art, the present invention adopts first lens arra 107, second lens arra 104 and liquid crystal shutter 106 to obtain the sub-image of low resolution, adopts the super-resolution image recovery technique that each sub-image is synthesized high-resolution image again.Because the requirement to the resolution of sub-image is lower, thus optics length overall can be shortened to the camera module 100 that forms sub-image, so the thickness of camera module 100 can be less.
It is understandable that in other embodiments, first lens arra 107 can comprise capable n row first lens 105 of m (m, n are positive integer).Correspondingly, second lens arra 104 comprises capable n row second lens 102 of m, and liquid crystal shutter 106 has mxn light hole 1068.
It is understandable that in the liquid crystal shutter 106, last polaroid 1061, the order that goes up light shield layer 1062 and top electrode 1063 can arbitrarily be changed, bottom electrode 1065, the order of light shield layer 1066 and following polaroid 1067 can arbitrarily be changed down.
In array is taken, take two continuous sub-images, the image coincidence may be arranged in these two sub-image boundary zones and produce the fuzzy situation of two sub-image edges, this situation is called image fault (Aliasing).It is understandable that; Do not produce under the situation of Aliasing in assurance; Controller 50 can be opened two or more light holes 1068 at one time, and CIS 20 can obtain two width of cloth or the above sub-image of two width of cloth at one time, thereby shortens the time of taking sub-image continuously.
In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, these all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.

Claims (10)

1. camera module is characterized in that it comprises:
First lens arra, this first lens arra comprises a plurality of first lens;
Second lens arra, this second lens arra comprises a plurality of second lens, these a plurality of second lens and this a plurality of first lens difference are optical alignment one by one;
Be arranged on the liquid crystal shutter between this first lens arra and this second lens arra, this liquid crystal shutter has a plurality of light holes, and these a plurality of light holes and this a plurality of first lens difference are optical alignment one by one;
Controller was used in a shooting cycle, controlled each light hole of this liquid crystal shutter and opened once;
CIS be used for one should be in the shooting cycle each light hole when opening, obtain a width of cloth sub-image corresponding with each light hole; And
Image processor is used to adopt the super-resolution image recovery technique should synthesize a width of cloth image by each width of cloth sub-image corresponding with each light hole in the shooting cycle at one.
2. camera module as claimed in claim 1; It is characterized in that; This camera module further comprises a upper substrate and an infrabasal plate; This first lens arra is formed on this upper substrate, and this second lens arra is formed on this infrabasal plate, and this liquid crystal shutter is arranged between this upper substrate and this infrabasal plate.
3. camera module as claimed in claim 2 is characterized in that, host cavity of common formation between this upper substrate and this infrabasal plate, and this liquid crystal shutter is arranged in this host cavity.
4. camera module as claimed in claim 1; It is characterized in that; From the direction of this first lens arra to this second lens arra, this liquid crystal shutter comprises polaroid, last light shield layer, top electrode, liquid crystal layer, bottom electrode, following light shield layer, following polaroid successively.
5. camera module as claimed in claim 4 is characterized in that, this top electrode is transparency electrode with this bottom electrode.
6. camera module as claimed in claim 4; It is characterized in that; Should go up light shield layer and offer a plurality of light holes gone up, this time light shield layer offers a plurality of light holes down, and these are a plurality of, and upward light hole is corresponding one by one with these a plurality of first lens respectively; These are a plurality of, and light hole is corresponding one by one with these a plurality of first lens respectively down, and light hole and corresponding light hole are down formed the light hole of this liquid crystal shutter jointly on each.
7. camera module as claimed in claim 4 is characterized in that, the material of this liquid crystal layer is a ferroelectric liquid crystals.
8. camera module as claimed in claim 1 is characterized in that, one should be in the shooting cycle, this controller is opened this a plurality of light holes successively, and only opens a light hole at every turn.
9. camera module as claimed in claim 8 is characterized in that, when opening a light hole, controller is synchronously controlled this CIS and obtained a width of cloth sub-image corresponding with this light hole.
10. camera module as claimed in claim 1 is characterized in that, one should be in the shooting cycle, this controller is opened two or more light holes simultaneously.
CN201010250881.4A 2010-08-11 2010-08-11 Camera module Expired - Fee Related CN102375199B (en)

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