CN105022980B - A kind of bar code image recognizing apparatus - Google Patents
A kind of bar code image recognizing apparatus Download PDFInfo
- Publication number
- CN105022980B CN105022980B CN201510448291.5A CN201510448291A CN105022980B CN 105022980 B CN105022980 B CN 105022980B CN 201510448291 A CN201510448291 A CN 201510448291A CN 105022980 B CN105022980 B CN 105022980B
- Authority
- CN
- China
- Prior art keywords
- backlight
- lampshade
- light source
- bar code
- integrated circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Image Input (AREA)
Abstract
The present invention provides a kind of bar code image recognizing apparatus, including lighting device and integrated circuit；Integrated circuit, lighting device, target area is irradiated when integrated circuit obtains reflection light, the lighting device includes backlight lampshade, the first light source and secondary light source；The cover body that backlight lampshade is enclosed by backlight, the cover body both ends are provided with big opening and small opening, the small opening of the backlight lampshade sets integrated circuit, the backlight of backlight lampshade and the optical axis of integrated circuit are angled, the backlight lampshade changes the light path of lighting device, and guiding light enters in the field range of integrated circuit；The backlight lampshade includes front and the back side, and accommodation space is provided between front and the back side, the first light source is set in the accommodation space；The secondary light source is fixed on the edge that backlight lampshade leans on big opening, and secondary light source is the luminous model of lambert.Using described backlight lampshade forming face light source, the illumination power uniformity of whole light-emitting area has reached more than 90%.
Description
Technical field
The present invention relates to bar code reading field, more particularly to a kind of bar code image recognizing apparatus.
Background technology
Many total well known, optical code is according to color and optionally according to the number and relative size of multiple units
Coded information, the Linear optical code of bar shaped is for example comprising typical secret note and the white empty alternate sequence of typical case, secret note and white
Each empty has multiple basic widths.2 d code includes the unit grid of constant shapes and size, but with two kinds
Or more kind different colours.
Usual optical code reader includes one or more light sources, for lighting pattern to be radiated on optical code
Illumination optics and the light for being diffused to the optical code irradiated are detected and produced by its amplitude and phase
Position represents the device of the electric signal of the color of optical code unit and size.
Two-dimensional bar code is all contained using CCD or CMOS camera collection on Quick Response Code or two-dimensional bar code recognizing apparatus at present
Image, then a series of processing are carried out to image, remove background positioning bar code region, then extract barcode data information.It is existing
Two-dimensional bar code recognition system be normally only directed under formation state that complete, deformation is not serious and illumination it is more satisfactory in the case of
Two-dimensional barcode image, it is mostly smooth metal material for the surface identified, but camera acquired image would generally contain
There is the stronger reflective, phenomenon such as uneven illumination and contrast are low, while bar code shape has a certain degree of distortion.For curvature
Bigger cylindrical surface even has retroreflective regions overlay code area, causes bar code information to be lost.For metal cylinder subscript
These distinctive complex situations of the Quick Response Code bar code of knowledge, if being illuminated shooting grabgraf by general lighting system, by
In metal surface reflection and the medium reason of light intensity collection, the defects of image shinny overexposure can be caused, can not normally be decoded, it is existing
Bar code scan, recognition read equipment used by lighting system mostly be using some LEDs arrangement vertical irradiation object
Body, and the light path which is formed typically faces object than relatively straightforward, distinguishes ink in this way or is sprayed on
Bar code in papery can be distinguished normally, but for the bar code on high-strength reflective metallic surfaces, because light is anti-on its surface
Penetrate and cause the excessively bright overexposure of image not decode, arranging more close situation for bar code can cause surface reflection to disturb, metal
Superficial objects region intensity of illumination is uneven, and brightness differs.
The content of the invention
The technical problem to be solved in the present invention, it is to provide a kind of simple in construction, the bar code image recognition of good illumination effect
Equipment, the image in 2 D code for solving the problems, such as existing high reflective surface can not be distinguished.
What the present invention was realized in：A kind of bar code image recognizing apparatus is provided,
Including lighting device and integrated circuit；
Integrated circuit, including at least one two-dimensional image sensor array, the two-dimensional image sensor array include more
Individual active pixel, the active pixel include at least one shielding data storage areas, and the two-dimensional image sensor array absorbs
The light of target area reflection, output voltage is converted into by luminous intensity；
Lighting device, target area is irradiated when integrated circuit obtains reflection light, the lighting device includes backlight
Cover, the first light source and secondary light source；
The cover body that backlight lampshade is enclosed by backlight, the cover body both ends are provided with big opening and small opening, the back of the body
The small opening of light lampshade sets integrated circuit, and the backlight of backlight lampshade and the optical axis of integrated circuit are angled, described
Backlight lampshade changes the light path of lighting device, and guiding light enters in the field range of integrated circuit；
The backlight lampshade includes front and the back side, accommodation space being provided between front and the back side, in the accommodation space
First light source is set；
The secondary light source is fixed on the edge that big opening is leaned in backlight lampshade front, and secondary light source is the luminous model of lambert；
The backlight lampshade by multiple backlight sheet combinations into, including the first backlight and the second backlight, first back of the body
Tabula rasa and the second backlight connect into the backlight lampshade of Pyramid；
One end in the backlight lampshade that first backlight, the second backlight sheet combination are formed by big opening sets the first light source；
The front of the backlight lampshade is furnished with light diffusion sheet, and the back side of the backlight lampshade is furnished with reflector plate；The backlight lampshade
Backlight includes reflector plate, light guide plate, extension piece；Numerous the air gap or granule proliferation, bottom are furnished with inside the light guide plate
Portion is furnished with scattering point.
Wherein, the backlight lampshade by multiple backlight sheet combinations into, including the first backlight and the second backlight, described
One backlight connects into the backlight lampshade of Pyramid with the second backlight；First backlight, the second backlight sheet combination are formed
Backlight lampshade in by big opening one end set the first light source.
Wherein, the front of the backlight lampshade is furnished with light diffusion sheet, and the back side of the backlight lampshade is furnished with reflector plate.
Wherein, one end in first backlight by big opening sets 3 illuminators, is leaned in second backlight big
One end of opening sets 5 illuminators.
Wherein, each backlight front of first backlight is by two illuminators of big opening one end arrangement, the hair
The body portion of body of light tilts, two luminaire spacing certain distances.
Wherein, the angle of the optical axis of the positive illuminator for leaning on big opening one end of first backlight and integrated circuit is
30°-55°。
Wherein, the first backlight front is bonded in the first backlight by the illuminator of big opening one end.
Wherein, the front of the backlight lampshade, the marginal position in big opening one end are provided with lightproof area.
Wherein, first backlight, the second backlight slitless connection.
Wherein, the emission wavelength of the illuminator is 620nm-760nm.
The advantage of the invention is that：
One, using described backlight lampshade, the spot light of lighting device is become into area source, the hair of whole lighting device
The illumination power uniformity of smooth surface has reached more than 90%, and the uniform light that described bar code image recognizing apparatus projects is radiated at
On target barcode, if bar code background is high reflective metal surface, uniform background can be produced in community's bar code image；
Secondly, brightening processing done using above-mentioned Novel backlight lighting engineering, background so that beaten by stylus printer, laser
The two-dimensional bar code that beacon light mode is formed can be restored truly without overexposure phenomenon；
Thirdly, for the relatively low metal surface of reflectivity, by described secondary light source light filling, can further lift photograph
Bright intensity, strengthen ambient brightness, the picture catching and recognition for being more beneficial for equipment decode；
Four, described bar code image recognizing apparatus, its simple in construction, easy to assembly, convenient material drawing, easily generates system
Make, and manufacturing cost is reasonable, is easy to commercially be widely popularized.
Brief description of the drawings
Fig. 1 show the front view of the backlight lampshade of the bar code recognizing apparatus of the present invention；
Fig. 2 show the overview of the backlight lampshade of the bar code recognizing apparatus of the present invention；
Fig. 3 show the structural representation of an embodiment of the first light source of the bar code recognizing apparatus of the present invention；
Fig. 4 show the lateral plan of the bar code recognizing apparatus of the present invention；
Fig. 5 show the illuminating ray schematic diagram of the bar code recognizing apparatus of the present invention；
Fig. 6 show the illuminating effect schematic diagram of the bar code recognizing apparatus of prior art；
Fig. 7 show the illuminating effect schematic diagram of the bar code recognizing apparatus of the present invention；
Fig. 8 show the light path schematic diagram of the luminous model of lambert of the present invention；
Fig. 9 show the light path schematic diagram of the luminous model of lambert of the present invention；
Figure 10 show the structural representation of the backlight of the present invention.
Label declaration：
The backlight 102 of backlight lampshade 100 first, 104 second backlights 101, the diffusion sheet 106 of 103 light guide plate 105
The illuminator 201 of reflector plate 107,202,203,204 first light source, 001 lightproof area, 002 big opening, 301 small opening 302
The integrated circuit 601 of 401 two-dimensional image sensor array of imaging len 501
The target area 801 of angle 701 of illuminator 201,202,203,204 and integrated circuit optical axis
The light 902 that the strong backlight of light 901 of the key light of illuminator 201,202,203,204 is launched
Embodiment
To describe the technology contents of the present invention, construction feature, the objects and the effects in detail, below in conjunction with embodiment
And accompanying drawing is coordinated to be explained in detail.
The invention discloses a kind of bar code image recognizing apparatus, including lighting device and integrated circuit 601；Described illumination
Light is radiated on target area 801 (such as one-dimensional or two-dimensional bar) by device, and described integrated circuit 601 can be adopted
Collect the light of reflection and carry out the processing of correlation, described integrated circuit 601 includes at least one two-dimensional image sensor array
501, the two-dimensional image sensor array 501 includes multiple active pixels, and the active pixel includes at least one shielding data
Storage region, the two-dimensional image sensor array 501 absorb the light that target area 801 is reflected, luminous intensity are converted into defeated
Go out voltage；Multiple active pixels of described two-dimensional image sensor array 501 can expose simultaneously catches image-reading device
Non-distorted image is grasped, it is exposure period that the pixel activated jointly, which converts incident light into this period of electric charge, works as exposure period
When end, by the electric charge transfer of aggregation to the memory block of shielding, until data are read.Pass through the situation in weak ambient light
It is lower fully to shorten illumination phase or exposure period, or fully shorten exposure period under strong light environment, the image reading of the present embodiment is set
It is standby to capture substantially unambiguous image.
Bar code image as described above reads equipment, and described lighting device can include backlight lampshade 100, the first light source
001st, secondary light source, lighting control module, mains lighting supply module and interface module, lighting device obtain in integrated circuit 601
Target area 801 is irradiated during reflection light；The cover body that backlight lampshade 100 is enclosed by backlight, the cover body both ends difference
Provided with big opening 301 and small opening 302, integrated circuit 601, backlight lampshade are set at the small opening 302 of the backlight lampshade 100
100 backlight and the optical axis of integrated circuit 601 are angled, and the backlight lampshade 100 changes the light path of lighting device, draws
Guide-lighting line enters in the field range of integrated circuit 601；The backlight lampshade 100 include front and the back side, front with the back side it
Between be provided with accommodation space, the first light source 001 is set in the accommodation space；The secondary light source is fixed on backlight lampshade 100 and leaned on
The edge of big opening 301, secondary light source are the luminous model of lambert.Present embodiment can be each using the light source of the luminous model of lambert
Brightness on individual direction is consistent, the luminous intensity I of Lambertian source in one direction in opticsθHung down equal to the light source luminescent face
The upward luminous intensity I of NogataoDirection cosine of an angle is multiplied by, as shown in Figure 8.Lambertian source is in θ angular direction light intensity Iθ=Iocos
θ, now require that the brightness that light source can be in all directions is consistent.According to photometric brightness definition such as Fig. 9, lambert's light type is corresponded to
LED light source is L in the brightness of θ angular directionθ=Iθ/ dscos θ=Io/ ds, in formula, L unit is nit, 1nt=1cd/m2；D is
Lens thickness.Known by formula (2), the L of any directionθ=Io/ ds is certain value, and old friend's eye watches Lambertian source institute in any direction
The brightness of perception is identical, i.e., so-called Lambertian source is isotropism light source.
With reference to shown in figure 3, in various embodiments, the structure of described backlight lampshade 100 can be that a backlight is curved
The two ends that song is bonded have the backlight lampshade 100 of big opening 301 and small opening 302, or are spelled by multiple backlights
The two ends connect have big opening 301 and it is small opening 302 backlight lampshade 100, the big opening 301 of the two ends and
Small opening 302 is not intended to limit its two ends and is necessary for open state, and such as 302 one end of the small opening can be that the shape of closure is formed
One storage tank, described integrated circuit 601 are fixed in storage tank so that integrated circuit 601 possesses a stable fixed bit
Put, improve the stability of product, increase the service life.Its junction of backlight lampshade 100 that single backlight is formed can be seamless
Splicing, rounding off；Connection between the 100 two neighboring backlight of backlight lampshade that multiple backlight sheet combinations form is alternatively nothing
Seam splices or generic connectivity (bonding, thermoplastic processes connection), angled splicing between two neighboring backlight, and adjacent two
Splicing angle between backlight can be 50 ° -160 °, such as 120 °, 135 °, 140 °, the backlight formed by backlight sheet combination
Had a certain degree between 100 its backlight of cover and the optical axis of integrated circuit 601, the backlight and the optical axis of integrated circuit 601
Between angle can be 30 ° -80 ° between, preferably can be 60 °, 45 °, 70 ° angularly, the backlight lampshade being made up of backlight
100 can be horn-like, bullet, polygonal body etc., and described backlight lampshade 100 forms area source in target area 801, adopted
Face uniformly light-emitting can be realized with area source, the shape for being formed at the area source of target area 801 can be circle, triangle, water chestnut
Shape, square, rectangle, ellipse etc. various constructions.In one embodiment, the backlight lampshade 100 irradiates target area
The color of the light in domain 801 can be the various lists combined by seven colour systems such as red, purple, blueness, green, yellow, white
The bright face of colour system or color series, a length of 620nm-760nm of light wave of target area 801 is irradiated, such as uses monochromatic LED,
The stronger wavelength of naked eyes sensitivity is 700nm red band.In various embodiments, the backlight of the backlight lampshade
Structure can be to include reflector plate 107, light guide plate 105, the light source 001 of diffusion sheet 106 and first, as shown in fig.10, light guide plate
Numerous the air gap or granule proliferation are furnished with inside 105, bottom is furnished with the scattering formed using silk-screen or laser dotting mode
Point, surface is using silk-screen form increase uniform light degree；The light that light source is sent is on the multiple reflection inside of light guide plate 105 and surface
Refraction forms diffusing reflection light, while backlight bottom is furnished with one layer of reflector plate 107 so that is projected from the bottom of light guide plate 105
Light is reflexed to inside light guide plate 105 through the effect of reflector plate 107, and the backlight top can one layer of diffusion sheet 106 of cloth so that whole
The light that body projects has more uniformity, is finally reached uniform area light source effect.In the present embodiment, the backlight lampshade 100
Backlight can use bottom-emission class backlight, its brightness, bright uniformity are preferable, and described backlight can also use
The luminous class of sidepiece or CCFL classes, the backlight lampshade 100 that different types of backlight sheet combination forms can be achieved as target area
The purpose of 801 illuminations.
In various embodiments, the first light source 001, secondary light source can include white or colored light source, such as
660nm illumination LEDs, infrared LEDs, ultraviolet LED, laser, halogen light lamp, arc lamp or incandescent lamp etc., they can to
Enough luminous intensities are produced under fixed Graphic reader power constraint and image sensor exposure/sensitivity requirement.Due to LED's
Effec-tive Function make it that power consumption is relatively low, so selection LED is as light source, the first described light of lighting control module control
Source 001 and the operation of secondary light source, described mains lighting supply module provide necessary energy to drive the first described light source
001 and secondary light source, it can include battery, electric capacity, inductance, transformer, semiconductor, integrated circuit 601 etc..Preferable
In embodiment, some or all elements of mains lighting supply module are located at the first light source 001, the outside of secondary light source.Interface
Module, which is used to read in the described integrated circuit 601 of equipment with bar code image, needs other modules of simultaneously operating to be led to
Letter, it can include the regulation of above-mentioned illumination phase and exposure period.In some embodiments, such as highlighted metal
Surface (optical reflectivity is equal to greatly 60%), as the DPM (direct that the bar code is formed by stylus printer, laser marking lamp mode
Park marking) directly mark：The bar code directly printed on part, it is no longer necessary to bar code is beaten after label and is attached to production
On product, but bar code being directly printed upon on product by some technologies) optical reflectivity is usually several times of common bar code,
So that bar code image reads equipment and bar code image can not be identified, background is carried out brightening processing by described lighting device,
Controlled by described lighting control module, the first described light source 001 is opened, secondary light source is closed, and enables to metal
It is not in overexposure phenomenon that the bar code image on surface, which really restores, best results；For the slightly lower metal watch of reflectivity
Face, described lighting control module control secondary light source carry out light filling, can further lift the intensity of illumination, and increase environment is bright
Degree, the picture catching and recognition for being more beneficial for equipment decode；For papery code because its surface reflectivity is relatively low, described illumination control
Molding block can control secondary light source to be used as light source, while the first light source 001 described in lighting control module control is closed.It is logical
Control more than crossing reaches optimal light illumination mode.
With reference to shown in figure 1, Fig. 2, in one embodiment described backlight lampshade 100 by multiple backlight sheet combinations into, bag
Include the first backlight and the second backlight, the first backlight is backlight 102,104, second backlight be backlight 101,
103, first backlight connects into the backlight lampshade 100 of Pyramid with the second backlight.Two neighboring backlight it
Between shape have a certain degree, also shape has a certain degree between backlight and the optical axis of integrated circuit 601, four backlights 101,
102nd, 103,104 combinations form the backlight lampshade 100 of a Pyramid, and the size of big opening 301 is determined described in backlight lampshade 100
The range of exposures of the area source is determined, the backlight lampshade 100 forms a bright uniform area source in face in integrated circuit 601
Target area 801 is irradiated when obtaining view data.First backlight 102,104, the combination of the second backlight 101,103 are formed
Backlight lampshade 100 in by big opening 301 one end set the first light source 001, the first described light source 001 can use monochrome
Or colored illuminator, such as illumination LED, infrared LEDs, ultraviolet LED, laser, halogen light lamp, arc lamp or incandescent lamp
Deng they can produce enough under given Graphic reader power constraint and image sensor exposure/sensitivity requirement
Luminous intensity, first backlight, the second backlight can set 660nm LED, set by the first backlight 102,104
Quantity, color, the optical wavelength of LED can be with the quantity, color, light of the LED set by second backlight 101,103
The parameters such as wavelength are identical or different, it is described it is identical can be that a wherein parameter is identical, two of which parameter is identical, more
The identical either all parameter all same or difference of parameter.In one embodiment, first backlight 102,104 is big
301 1 end margins that are open set 3 illuminators, the second backlight 101,103 to set 5 illuminators by one end of big opening 301,
First backlight 102,104, the quantity of illuminator can be according to the demand setting used, this reality in the second backlight 101,103
The setting for applying number in mode is only the setting means that one of which illustrates, the hair in first backlight 102,104
The quantity of body of light can be set as it is at least one, such as 1,2,3,4 or more, the product parameters of each illuminator
Can be with identical or different, the second backlight 101,103 can be set as at least by the quantity of the illuminator of the one end of big opening 301
One, such as 1,2,3,4 or more, the product parameters of each illuminator can be with identical or different.The hair
Body of light can set its number, optical wavelength, color etc. according to the demand of actual use, or using different model, different classes of
Illuminator.
Shown in reference chart, in an embodiment different from above-mentioned various embodiments, first backlight
Each backlight front is set by the one end of big opening 301 arrangement illuminator, i.e., described first backlight front by the one end of big opening 301
Secondary light source is put, the set-up mode of the secondary light source can be：Backlight 102,104 front arrange two illuminators,
At intervals, such as two illuminators 202,203 can divide two illuminators 202,203 set by the front of backlight 102
The two edges termination of backlight 102 is not arranged on, and two illuminators 201,204 set by the front of backlight 104 are separated by necessarily
Distance, such as two illuminators 201,204 can be separately positioned on the two edges termination of backlight 104.Illuminator 201,202,
203rd, 204 point lines can form a matrix or rhombus, wherein the preferably shape of matrix, is replaced by the way of matrix
For original LED compact modes so that the bright face that shadow surface is formed is uniform, good illumination effect.The setting side of the secondary light source
Formula is not limited to the symmetrically arranged mode in above-mentioned both sides, can use backlight 102 and the illuminator quantity of backlight 104, ginseng
The different set-up mode of number, the illumination purpose of present embodiment is equally reached, illuminator line can form three as mentioned
The different shape such as angular or polygon.Illuminator 201,202,203,204 can use monochromatic or colored illuminator,
Such as illumination LED, infrared LEDs, ultraviolet LED, laser, halogen light lamp, arc lamp or incandescent lamp etc., they can be given
Graphic reader power constraint and image sensor exposure/sensitivity requirement under produce enough luminous intensities.In an embodiment party
In formula, the illuminator 201,202,203,204 described in secondary light source can use the wavelength of red as 660nm LED, or use
The LED of other models, the angle of the optical axis of illuminator 201,202,203,204 and integrated circuit 601 may be set to 30 °-
55 °, 35 °, 40 °, 45 °, shown in reference picture 5 are such as may be set to, the first backlight front is by the luminous of the one end of big opening 301
Between the angle 701 of body 201,202,203,204 and the optical axis of integrated circuit 601 is 30 ° -55 °, pass through the angle illuminator
201st, the strong light 901 of 202,203,204 key lights is mapped to after target barcode through surface emitting (within the scope of half dispersion angle) outside
Optical lens 401 and two-dimensional image sensor array 501 of the portion space without reaching integrated circuit 601, can effectively avoid making
There is reflective overexposure phenomenon in the image absorbed into system, and backlight 102,104 face uniformly light-emittings, entire surface illumination power is uniformly
Degree can be controlled more than 90%, and the uniform irradiation of light 902 launched by backlight is on target barcode, if bar code background is
High reflective metal surface, then can produce uniformly bright background, as shown in Figure 6, Figure 7, compared to conventional lighting sources at bar code image
Captured picture, can using the superiority of the picture captured by present embodiment with using the picture captured by present embodiment
Significantly show.In various embodiments, the illuminator 201,202,203,204 of the secondary light source can pass through bonding
Mode be fixed on the first backlight front lean on big opening 301 opening position.After being fixed on such as illuminator 202,203 on a lines
The front of the backlight 102 of the first backlight is bonded in again, and illuminator 201,204 is bonded in first again after being fixed on a lines
The front of the backlight 104 of backlight, is attached in the first backlight using which, and illuminator bottom is put down with backlight plate surface
Row bonding.Or described illuminator 201,202,203,204 can be independently be fixed on the first backlight close to opening greatly
At 301 marginal positions of mouth.
In various embodiments as described above, the marginal position of one end of positive big opening 301 of the backlight lampshade 100
Provided with lightproof area 002, described photo-shield strip can use common black tape etc. can shading flexible strip-like articles, the shading region
Domain 002 can surround the edge of big opening 301 and form a circle width identical photo-shield strip, and described lightproof area 002 can also enclose
The photo-shield strip that formation width differs around the edge of big opening 301.Described photo-shield strip causes the big opening 301 of backlight lampshade 100
First light source 001 at edge will not produce bright, dazzling light so that face light can be more balanced caused by backlight lampshade 100.
In various embodiments as described above, the front of the backlight lampshade 100 is furnished with light diffusion sheet 106, backlight
The back side of lampshade 100 is furnished with reflector plate 107, can increase the particle or bubble uniformly spread inside the positive diffusion sheet, make
Obtaining the first described light source 001 can uniformly spread.The reflector plate 107 at the back side causes original light projected by bottom
Line returns to backlight and diffusion sheet reaches illumination region because of the effect of reflector plate.
Using bar code image recognizing apparatus from target collection view data process, target can include it is such as one-dimensional or
The symbolism of two-dimensional bar, in one embodiment, including light source is activated to use illumination target, in response to shining
Bright control module and activate light source, within the duration of Lighting control commutator pulse, by the first light source 001 or the activated
Two light sources are illuminated to target, to generate several times of the illumination of becoming clear than standard operation.Bar code figure for highlighting metal surface
Picture, controlled by described lighting control module, the first described light source 001 is opened, secondary light source is closed, and enables to gold
It is not in overexposure phenomenon that the bar code image of metal surface, which really restores, best results；For the slightly lower metal of reflectivity
Surface, described lighting control module control secondary light source carry out light filling, can further lift the intensity of illumination, and increase environment is bright
Degree, the picture catching and recognition for being more beneficial for equipment decode；For papery code because its surface reflectivity is relatively low, described illumination control
Molding block can control secondary light source to be used as light source, while the first light source 001 described in lighting control module control is closed, and is led to
Control more than crossing reaches optimal light illumination mode so that described bar code image recognizing apparatus efficiently can enter to bar code image
Row identification.Described lighting control module can also control first light source 001, the brightness of secondary light source, each to be applicable
The recognition of bar code under kind lightness environment.First light source 001, secondary light source brightness regulation can be by changing in circuit
Induction reactance value realizes, the mode that the regulation of described brightness can be adjusted manually can also by the bar code recognizing apparatus from
The mode of sensing light intensity realizes ABC.
In one embodiment, the integrated circuit 601 of described bar code image recognizing apparatus includes having based on global electricity
The imaging sensor of sub- shutter, the imaging sensor based on global electronic shutter can simultaneously in exposure image sensor generally
All pixels, described imaging sensor can be the imaging sensors (CMOS) based on complementary metal oxide semiconductor,
In another embodiment, described imaging sensor is the imaging sensor based on CCD.
The another aspect of bar code image recognizing apparatus as described above, described image recognition device include being used as main process task
IC chip, memory module, lighting device, imaging len 401 and the control mould of the two-dimensional image sensor array 501 of device
Block, primary processor can be with the multifunctional integrated circuit chip for integrating frame grabber and CPU, described control
Molding block produces the trigger signal for making equipment obtain image, and described control module can be the triggering of manual actuation
Device, when the trigger is pressed down and (is triggered), the trigger signal of control module is generated, sends control signals to described image
Other modules of recognizing apparatus such as two-dimensional image sensor array 501.When trigger signal produces, the recognition of described image
Equipment is driven to state of activation from idle condition.Described control module can also be by the mode such as wired, wireless from remotely connecing
Receive trigger signal.Memory module includes the storage devices such as RAM, EPROM, flash memory, non-volatile programmable storage, stores mould
Block is communicated by system bus with described host processor chip, and primary processor is according to storage in a storage module specific
Software is operated, and ROM memory can be used for the operating system instruction of storage image recognizing apparatus and for accommodating safety
The code of data or other modules, RAM memory can be used for the ephemeral data storage in image recognition device.It is non-volatile can
Programmable memory can use various forms, and preferably programmable read only memory EPROM and electrically erasable is read-only
Memory EEPROM.
In one embodiment, described integrated circuit 601 include optical module, two-dimensional image sensor array 501 with
And sensor array control module, it is electrically connected to each other between these modules, optical module includes being used to guiding and focusing on reflection spoke
The imaging len 401 or other optical elements penetrated.Described sensor array control module includes global electronic shutter control mould
Block, row and column addressing and decoder module, and read module, each of which module and one in sensor array control module
Individual or multiple other modules electrical connections.In one embodiment, sensor array module includes having the X-Y scheme based on CMOS
As the auxiliary circuit of the IC chip of sensor array 501, such as analog-to-digital conversion etc. can be between image sensor array
Every on the chip separated or be integrated in as image sensor array.In an alternate embodiment of the invention, two dimensional image passes
Sensor array 501 can include the global electronic shutter that can expose the ccd sensor array for storing whole frame image data simultaneously
Control module, global electronic shutter control module can be simultaneously all or generally all in exposure image sensor array
Pixel, in one embodiment, global electronic shutter control module include time block, row and column addressing and decoder module.One
In embodiment, described two-dimensional image sensor array 501 further comprises roller shutter type control module, roller shutter type control module energy
It is enough to expose successively and read the pixel column in image sensor array.
In a preferred embodiment, described two-dimensional image sensor array 501 is attached to CMOS ic cores
On piece, each pixel of cmos image sensor array has on piece light shield memory block in pixel and piece.Described X-Y scheme
Can also have the row circuit and column circuits on chip as sensor array 501, row circuit and column circuits can handle various
Business (such as addressing pixel, decoded signal, signal amplification, the conversion of analog-to-digital signal, application timing, reading and reset signal).
In a preferred embodiment, described two-dimensional image sensor array 501 is ccd image sensor chip, CCD
Image sensor chip includes the auxiliary circuit such as area array, register and output amplifier, described register and other
The relevant electric charge of each pixel is converted to voltage by auxiliary circuit etc. successively, and pixel image signal is sent into the outer of chip
Portion, when starting reading out view data, the electric charge in every a line of pixel is sequentially transmitted to output register, output register
Output amplifier is injected charge into successively, and output amplifier converts pixel charge to voltage, and image processing circuit is applied
Plus signal.When electric charge is sent to output register from the first row pixel, the electric charge line down of next line, so work as the first row
When overlapping has been translated into voltage, output register receives the electric charge of the second row pixel, continues with until reading phase
The view data of all row pixels for the two-dimensional image sensor array 501 answered.
Embodiment as described above, described bar code image recognizing apparatus use described backlight lampshade 100, will illuminated
The spot light of device becomes area source, and the illumination power uniformity of the light-emitting area of whole lighting device has reached more than 90%, institute
The uniform light that the bar code image recognizing apparatus stated projects is radiated on target barcode, if bar code background is high reflective metal
Surface, then it can produce uniform background when irradiating bar code image；Using above-mentioned Novel backlight lighting engineering, background is done bright
Change is handled so that the two-dimensional bar code formed by stylus printer, laser marking lamp mode can be restored truly without mistake
Expose phenomenon；For the relatively low metal surface of reflectivity, by described secondary light source light filling, it is strong can further to lift illumination
Degree, strengthen ambient brightness, the picture catching and recognition for being more beneficial for equipment decode；Described bar code image recognizing apparatus, it is tied
Structure is simple, easy to assembly, convenient material drawing, easily generates manufacture, and manufacturing cost is reasonable, is easy to commercially be widely popularized.
Although being explained by reference to structure disclosed herein to the present invention, protection scope of the present invention is not limited to
In this details, present invention covers the various change in the scope and spirit of claims and replacement.
Claims (8)
- A kind of 1. bar code image recognizing apparatus, it is characterised in that：Including lighting device and integrated circuit；Integrated circuit, including at least one two-dimensional image sensor array, the two-dimensional image sensor array have including multiple Source pixel, the active pixel include at least one shielding data storage areas, and the two-dimensional image sensor array absorbs target The light of region reflection, output voltage is converted into by luminous intensity；Lighting device, irradiate target area when integrated circuit obtains reflection light, the lighting device includes backlight lampshade, the One light source and secondary light source；The cover body that backlight lampshade is enclosed by backlight, the cover body both ends are provided with big opening and small opening, the backlight The small opening of cover sets integrated circuit, and the backlight of backlight lampshade and the optical axis of integrated circuit are angled, the backlight Lampshade changes the light path of lighting device, and guiding light enters in the field range of integrated circuit；The backlight lampshade includes front and the back side, and accommodation space is provided between front and the back side, is set in the accommodation space First light source；The secondary light source is fixed on the edge that big opening is leaned in backlight lampshade front, and secondary light source is the luminous model of lambert；The backlight lampshade by multiple backlight sheet combinations into, including the first backlight and the second backlight, first backlight The backlight lampshade of Pyramid is connected into the second backlight；One end in the backlight lampshade that first backlight, the second backlight sheet combination are formed by big opening sets the first light source；It is described The front of backlight lampshade is furnished with light diffusion sheet, and the back side of the backlight lampshade is furnished with reflector plate；The backlight of the backlight lampshade Plate includes reflector plate, light guide plate, diffusion sheet, and numerous the air gap or granule proliferation, bottom cloth are furnished with inside the light guide plate There is scattering point.
- 2. bar code image recognizing apparatus according to claim 1, it is characterised in that：Big opening is leaned in first backlight One end 3 illuminators are set, one end in second backlight by big opening sets 5 illuminators.
- 3. bar code image recognizing apparatus according to claim 2, it is characterised in that：Each backlight of first backlight Plate front tilts by two illuminators of big opening one end arrangement, the body portion of the illuminator, and two luminaire spacings are certain Distance.
- 4. bar code image recognizing apparatus according to claim 3, it is characterised in that：The first backlight front is by opening greatly The angle of the illuminator of mouth one end and the optical axis of integrated circuit is 30 ° -55 °.
- 5. bar code image recognizing apparatus according to claim 4, it is characterised in that：The first backlight front is by opening greatly The illuminator of mouth one end is bonded in the first backlight.
- 6. bar code image recognizing apparatus according to claim 5, it is characterised in that：The front of the backlight lampshade, Yu great The marginal position of open at one end is provided with lightproof area.
- 7. bar code image recognizing apparatus according to claim 6, it is characterised in that：First backlight, the second backlight Plate slitless connection.
- 8. bar code image recognizing apparatus according to claim 7, it is characterised in that：The emission wavelength of the illuminator is 620nm-760nm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448291.5A CN105022980B (en) | 2015-07-28 | 2015-07-28 | A kind of bar code image recognizing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448291.5A CN105022980B (en) | 2015-07-28 | 2015-07-28 | A kind of bar code image recognizing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105022980A CN105022980A (en) | 2015-11-04 |
| CN105022980B true CN105022980B (en) | 2017-11-14 |
Family
ID=54412940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510448291.5A Active CN105022980B (en) | 2015-07-28 | 2015-07-28 | A kind of bar code image recognizing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105022980B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102483359B1 (en) * | 2015-12-09 | 2023-01-02 | (주)테크윙 | Handler for testing semiconductor devices and information processing method thereof |
| CN106037659A (en) * | 2016-06-29 | 2016-10-26 | 郭福生 | Mobile tongue picture and face picture instrument |
| CN109424871B (en) * | 2017-08-18 | 2023-05-05 | 手持产品公司 | Illuminator for bar code scanner |
| CN107516058B (en) * | 2017-09-18 | 2024-03-08 | 苏州斯普锐智能系统股份有限公司 | Low-angle illumination code reader |
| CN107577976B (en) * | 2017-09-18 | 2024-03-08 | 苏州斯普锐智能系统股份有限公司 | Light supplementing type fixed code scanner |
| CN108134905B (en) * | 2018-01-10 | 2023-07-11 | 宽衍(河北)智能装备有限公司 | Illumination supplementary light unit and supplementary light device for tunnel detection image capture device |
| CN109815769A (en) * | 2019-01-31 | 2019-05-28 | 福州符号信息科技有限公司 | A kind of bar code recognizing apparatus |
| CN110991206B (en) * | 2019-12-19 | 2023-09-19 | 广东旭龙物联科技股份有限公司 | A reflective lensless DPM imaging system |
| CN114838815B (en) * | 2022-04-28 | 2024-06-04 | 厦门大学 | Device and method for representing uniformity of laser illumination light in multiple dimensions |
| CN115828956A (en) * | 2022-12-30 | 2023-03-21 | 苏州摩比信通智能系统有限公司 | Bar code scanning device and method capable of adjusting image definition |
| CN120580518B (en) * | 2025-08-01 | 2025-09-30 | 江苏优亿诺智能科技有限公司 | High-power visual area light source design method based on COB technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819059A (en) * | 2011-06-10 | 2012-12-12 | 光远科技股份有限公司 | Stacked double-layer light guide for LED backlight plate and backlight plate with same |
| CN104676464A (en) * | 2013-11-29 | 2015-06-03 | 海洋王（东莞）照明科技有限公司 | Lens assembly, light supplementing assembly and camera provided with light supplementing assembly |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7857224B2 (en) * | 2006-09-19 | 2010-12-28 | Microscan Systems, Inc. | Devices and/or systems for automatically imaging barcodes |
| CN103946732B (en) * | 2011-09-26 | 2019-06-14 | 微软技术许可有限责任公司 | Video display modification based on sensor input to see-through, near-eye displays |
| CN103186759B (en) * | 2013-04-17 | 2015-07-08 | 苏州斯普锐智能系统有限公司 | Barcode scanner with dynamic multi-angle illuminating system |
| CN205121579U (en) * | 2015-07-28 | 2016-03-30 | 福建新大陆电脑股份有限公司 | Bar code image recognition equipment |
-
2015
- 2015-07-28 CN CN201510448291.5A patent/CN105022980B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819059A (en) * | 2011-06-10 | 2012-12-12 | 光远科技股份有限公司 | Stacked double-layer light guide for LED backlight plate and backlight plate with same |
| CN104676464A (en) * | 2013-11-29 | 2015-06-03 | 海洋王（东莞）照明科技有限公司 | Lens assembly, light supplementing assembly and camera provided with light supplementing assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105022980A (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105022980B (en) | A kind of bar code image recognizing apparatus | |
| CN110995992B (en) | Light supplement device, control method of light supplement device, and computer storage medium | |
| CN109804238A (en) | Optical detection device | |
| CN101038689A (en) | Image reading device and paper money reading method | |
| CN109416740A (en) | Fingerprint detection device, method and electronic device | |
| CN111357008B (en) | Biometric imaging system and method for controlling the system | |
| CN103049727A (en) | Bar code recognizing, reading and decoding module and handheld electronic device | |
| CN110291530A (en) | Method for fingerprint identification, fingerprint identification device and terminal equipment | |
| KR20240045311A (en) | Glass bottle bottom inspection device | |
| CN205121579U (en) | Bar code image recognition equipment | |
| US9298961B2 (en) | Optical code reader | |
| US10670790B2 (en) | System and method for illuminating and identifying an object | |
| CN113962238B (en) | Light supplementing light source and identification code scanning device | |
| CN201673119U (en) | Scanning document detector | |
| ITMO20090317A1 (en) | PORTABLE DEVICE AND METHOD FOR READING CODIFIED INFORMATION | |
| CN109598173B (en) | Scanning device and scanning method thereof | |
| CN213812592U (en) | Multispectral imaging device for stroboscopic mobile phone | |
| US20150146267A1 (en) | Systems and methods for enhanced object detection | |
| CN209627504U (en) | Imaging sensor | |
| JP2010251930A (en) | Reader | |
| US11501098B2 (en) | Information code reader | |
| CN208754406U (en) | Interactive equipment and interaction infrared camera device | |
| CN103685833B (en) | Lighting apparatus, image sensor cell and paper type recognition | |
| CN109492452B (en) | Scanning device capable of reducing influence of illumination light reflected by scanning window on code scanning | |
| CN206757644U (en) | Banister read head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 350000 No. 1 Rujiangxi Road, Mawei District, Fuzhou City, Fujian Province Patentee after: New Continent Digital Technology Co., Ltd. Address before: 350000 No. 1 Rujiangxi Road, Mawei District, Fuzhou City, Fujian Province Patentee before: Fujian Newland Computer Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |