CN109633959A - The display device of fingerprint recognition in shielding can be achieved - Google Patents
The display device of fingerprint recognition in shielding can be achieved Download PDFInfo
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- CN109633959A CN109633959A CN201910052087.XA CN201910052087A CN109633959A CN 109633959 A CN109633959 A CN 109633959A CN 201910052087 A CN201910052087 A CN 201910052087A CN 109633959 A CN109633959 A CN 109633959A
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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
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
Abstract
The present invention provides a kind of display devices of fingerprint recognition in achievable screen, comprising: LCD backlight module, including light source and diffusion function layer；TFT substrate above LCD backlight module；Collimation layer between diffusion function layer and TFT substrate；TFT substrate is set away from the TFT circuit layer of collimation layer side, there is the first transmission region and non-transparent region；First transmission region is used to issue for light source and the collimated light after collimated layer collimation passes through；Fingerprint illuminant module is set on non-transparent region, and for receiving simultaneously induction targets signal light, echo signal light is that collimated light is reflected to form through the finger above TFT circuit layer.Manufacturing cost can be greatly reduced while realizing fingerprint recognition in screen in the display device of the embodiment of the present invention.
Description
Technical field
The present invention relates to a kind of display devices of fingerprint recognition in fingerprint identification technology field more particularly to achievable screen.
Background technique
The description of this part, which is only provided, discloses relevant background information to the present invention, without constituting the prior art.
Capacitance type fingerprint is applied to mobile phone, needs the aperture at front cover plate (ink area)/cell phone rear cover/side frame.By
This, this kind of fingerprint recognition mode can reduce screen accounting, and can destroy the structural intergrity of complete machine.
The silicon-based optical fingerprint technique of existing maturation, the fingerprint mould group needs for being built-in with fingerprint sensor chip fit in
Under OLED screen or on the mobile phone center that is fixed under OLED screen.Therefore, the component of fingerprint will not occupy the table of mobile phone for identification
Space of planes or region, so as to improve screen accounting.But due to needing to prepare chip using silicon substrate, for cost and reliability
Reason is generally suitable only for realizing the small area fingerprint recognition of fixed position, and cannot achieve the fingerprint recognition of large area.And silicon
Base is difficult to be integrated in screen.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
Based on prior art defect above-mentioned, the embodiment of the invention provides a kind of displays of fingerprint recognition in achievable screen
Device, it is intended to while realizing fingerprint recognition in shielding, reduce cost.
To achieve the goals above, the present invention provides the following technical solutions.
The display device of fingerprint recognition in a kind of achievable screen, comprising:
LCD backlight module, the diffusion function layer including light source and positioned at the light source side；
TFT substrate positioned at LCD backlight module side, the TFT substrate are located at the top of the diffusion function layer；
Layer is collimated, between the diffusion function layer and the TFT substrate；
The TFT substrate is set away from the TFT circuit layer of the collimation layer side, the TFT circuit layer has first
Transmission region and non-transparent region；First transmission region is used to issue for the light source and after collimation layer collimation
Collimated light passes through；Fingerprint illuminant module is set on the non-transparent region, and the fingerprint illuminant module is for receiving and incuding mesh
Signal light is marked, the echo signal light is that the collimated light is reflected to form through the finger above the TFT circuit layer.
Preferably, the TFT circuit layer is provided with liquid crystal layer away from the side of the TFT substrate；The non-transparent region
On be additionally provided with liquid crystal control circuit for being controlled the liquid crystal layer.
Preferably, the liquid crystal layer is provided with color filter film, the colorized optical filtering away from the side of the TFT circuit layer
Film is provided with cover board away from the side of the liquid crystal layer, and the cover board has the second transmission region, on second transmission region
It is formed with for the operating area for finger pressing.
Preferably, the LCD backlight module, the collimation layer and the TFT substrate are cascading；That is, the standard
Straight layer is arranged between the LCD backlight module and the TFT substrate.
Preferably, the collimation layer is implanted in the LCD backlight module, the LCD backlight module and the TFT substrate
It is stacked.
Preferably, the LCD backlight module further includes lower brightness enhancement film, and the lower brightness enhancement film is located at the diffusion function layer
Top；The collimation layer is arranged between the diffusion function layer and the lower brightness enhancement film.
Preferably, the LCD backlight module further includes lower brightness enhancement film and upper brightness enhancement film, and the lower brightness enhancement film is located on described
Between brightness enhancement film and the diffusion function layer；The collimation layer is arranged between the lower brightness enhancement film and the upper brightness enhancement film.
Preferably, the light source is the area source being arranged in below the diffusion function layer；The LCD backlight module is also wrapped
Reflector plate is included, the lower section of the area source is arranged in the reflector plate, and the reflector plate and the area source are stacked.
Preferably, the side of the diffusion function layer is arranged in the light source；The LCD backlight module further includes reflection
Piece, the lower section of the diffusion function layer is arranged in the reflector plate, and the reflector plate is set with diffusion function stacking.
Preferably, the LCD backlight module further includes optical waveguide layer, and the optical waveguide layer is arranged in the reflector plate and the expansion
It dissipates between functional layer.
Preferably, the fingerprint illuminant module is the electronics member device being integrated on the non-transparent region by TFT technique
Part and circuit.
Preferably, first transmission region is the opening of the upper and lower surface through the TFT circuit layer；Alternatively, described
First transmission region is the partial region made of translucent material on the TFT circuit layer.
By the way that the fingerprint illuminant module of fingerprint signal for identification to be integrated in TFT circuit layer, keep large area even complete
The fingerprint recognition of screen is possibly realized.And the integrated fingerprint illuminant module in TFT circuit layer, compared to using silicon-based optical fingerprint skill
For art prepares fingerprint chip, preparation process is more simple, and consumables cost and process implementing cost are lower, thus whole cost
It is greatly reduced.
In addition, each fingerprint illuminant module can be made by the way that collimation layer is arranged between TFT substrate and diffusion function layer
The fingerprint signal maximum intensity of vertical corresponding position is received, and receives adjacent position fingerprint signal intensity minimum.Such as
This, the excellent collimating effect of performance that can be achieved, image quality is higher.
With or configuration the embodiment of the present invention display device electronic equipment, without front cover on an electronic device
Plate, rear shell or side frame borehole, without carrying out fingerprint mould group with screen to be bonded operation.Also, fingerprint illuminant module is integrated
It is thinner for preparing fingerprint chip using silicon-based optical fingerprint technique in screen, be conducive to the light of electronic equipment
Thinning.
Referring to following description and accompanying drawings, the particular embodiment of the present invention is disclosed in detail, specifies the principle of the present invention
It can be in a manner of adopted.It should be understood that the embodiment of the present invention is not so limited in range.It is wanted in appended right
In the range of the spirit and terms asked, the embodiment of the present invention includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in other embodiments, is combined with the feature in other embodiments, or the feature in substitution other embodiments.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, shape and proportional sizes of each component in figure etc. are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the display device of fingerprint recognition in the achievable screen of first embodiment of the invention；
Fig. 2 is the structural schematic diagram of the display device of fingerprint recognition in the achievable screen of second embodiment of the invention；
Fig. 3 is TFT circuit layer in the display device of fingerprint recognition in Fig. 1 and/or the achievable screen of embodiment illustrated in Figure 2
Top view；
Fig. 4 is the index path of the display device of fingerprint recognition in the achievable screen of Fig. 1 and/or embodiment illustrated in Figure 2；
Fig. 5 A to Fig. 5 B is light source when being direct-light-type backlight, and collimation layer is arranged in LCD backlight module at different location
Structural schematic diagram；Specifically,
Fig. 5 A is the structural schematic diagram for collimating layer and LCD backlight module when between diffusion function layer and lower brightness enhancement film being arranged in；
Fig. 5 B is the structural schematic diagram for collimating layer and LCD backlight module when between upper brightness enhancement film and lower brightness enhancement film being arranged in；
Fig. 6 A to Fig. 6 B is light source when being side-edge type backlight, and collimation layer is arranged in LCD backlight module at different location
Structural schematic diagram；Specifically,
Fig. 6 A is the structural schematic diagram for collimating layer and LCD backlight module when between diffusion function layer and lower brightness enhancement film being arranged in；
Fig. 6 B is the structural schematic diagram for collimating layer and LCD backlight module when between upper brightness enhancement film and lower brightness enhancement film being arranged in.
Appended drawing reference:
1, LCD backlight module；2, layer is collimated；3, TFT substrate；4, TFT circuit layer；5, liquid crystal layer；6, color filter film；7,
Cover board；101, light source；102, diffusion function layer；103, lower brightness enhancement film；104, upper brightness enhancement film；106, optical waveguide layer；107, reflector plate；
401, the first transmission region；402, non-transparent region；403, fingerprint illuminant module；404, liquid crystal control circuit.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to guarantor of the present invention
The range of shield.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
In the present specification, by the display device of fingerprint recognition in the achievable screen of the embodiment of the present invention in normal use shape
It under state, is directed toward or is "upper" in face of the direction definition of user, will in contrast, or back to the direction definition of user be
"lower".
More specifically, the upwardly direction of meaning shown in Fig. 1 to Fig. 2, fig. 4 to fig. 6 B is defined as "upper", by Fig. 1 to figure
2, the downwardly direction of meaning shown in fig. 4 to fig. 6 B is defined as "lower".
It is worth noting that, all directions are defined in this specification, simply to illustrate that the side of technical solution of the present invention
Just, the display device of the restriction embodiment of the present invention is not including but is not limited to use, test, transport and manufacture etc. other
It may cause the direction in the scene that the generation of display device orientation overturns or position converts.
Display device provided in an embodiment of the present invention can operate with and including but not limited to shield lower unlocked by fingerprint, user identity
In the scenes such as verifying, authority acquiring.
Specifically, electronic equipment can be based on when the display device of the embodiment of the present invention is configured in electronic equipment
The display device obtains the fingerprint feature information of user, is matched to the finger print information with storage, is used with realizing current
The authentication at family, to confirm whether it has corresponding permission to execute relevant operation to electronic equipment.
It should be noted that the finger print information of above-mentioned acquisition, is only a kind of common embodiment in user biological feature.?
In the scope that can be envisioned, those skilled in the art, which can extend the technical solution of the embodiment of the present invention, applies to any appropriate life
In the verifying scene of object feature.Such as the scene that iris this biological information by obtaining user is verified, this hair
Bright embodiment is not construed as limiting this.
It is hereafter to state scene to obtain user fingerprints information as main and illustrate.But based on above description it is found that this hair
Therefore the protection scope of bright embodiment is not limited.
The display device of the embodiment of the present invention can be used in including but not limited to intelligent movable mobile phone, flat panel electronic and set
In the electronic equipments such as standby, computer, GPS navigator, personal digital assistant, intelligent wearable device.
In order to realize the basic function of electronic equipment, above-mentioned electronic equipment can also include other required modules or portion
Part.It can also include communication module, battery etc. by taking intelligent movable mobile phone as an example.
It should be noted that other required modules or component included by electronic equipment, can select any appropriate
Existing construction.To be clearly briefly described technical solution provided by the present invention, no longer above-mentioned part will be repeated herein,
Figure of description has also carried out corresponding simplification.It is to be understood that therefore the present invention is not restricted in range.
As shown in Fig. 1 and Fig. 2 and Fig. 5 A to Fig. 6 B, the display of fingerprint recognition in the achievable screen of the embodiment of the present invention
Device may include LCD (Liquid Crystal Display, liquid crystal display) backlight module 1.The then embodiment of the present invention
Display device is specifically as follows LCD display device or LCD display.
LCD backlight module 1 includes at least light source 101 and the diffusion function layer 102 positioned at 101 side of light source.In this implementation
In example, light source 101 can be any one in direct-light-type backlight or side-edge type backlight.
It is the embodiment that light source 101 is direct-light-type backlight as Fig. 5 A to Fig. 5 B is illustrated.As shown in Fig. 6 A to Fig. 6 B
Meaning, be the embodiment that light source 101 is side-edge type backlight.
As shown in Fig. 5 A to Fig. 5 B, in the embodiment that light source 101 is direct-light-type backlight, light source 101 can be setting
Area source below diffusion function layer 102.Specifically, the area source can be flat-plate light source, LED area light source etc..To make
The display effect of the display device of the embodiment of the present invention tends to be soft uniform.
As shown in Fig. 6 A to Fig. 6 B, in the embodiment that light source 101 is side-edge type backlight, light source 101 be can be set
The side of diffusion function layer 102.Likewise, side-edge type backlight may be flat-plate light source, LED area light source etc..
Certainly, the light source 101 in the embodiment of the present invention can be not limited to use area source.For example, there are optical waveguide layers/lead
In tabula rasa/light guide sheet embodiment, due to optical waveguide layer/light guiding board/light guiding piece can uniform point source illumination effect.Then also at this
In a little embodiments, point light source can also be used.
In order to improve display brightness as far as possible, the luminous energy for issuing direct-light-type backlight or side-edge type backlight to the greatest extent may be used
Upwardly propagating more than energy (when practical application, keep light as much as possible to electronic equipment external emission, and it is as few as possible to electricity
The internal emission of sub- equipment).LCD backlight module 1 can also include reflector plate 107.Reflector plate 107 is for issuing light source 101
Light towards diffusion function layer 102 direction reflect, i.e., the light that light source 101 issues is reflected upwards.
In the embodiment that the light source 101 that such as Fig. 5 A to Fig. 5 B is illustrated is direct-light-type backlight, the setting of reflector plate 107 exists
The lower section of area source, and reflector plate 107 and area source are stacked.The then light that direct-light-type backlight issues downwards, by reflector plate 107 to
Upper reflection.
In the embodiment that the light source 101 that such as Fig. 6 A to Fig. 6 B is illustrated is side-edge type backlight, the setting of reflector plate 107 exists
The lower section of diffusion function layer 102, and reflector plate 107 is stacked with diffusion function layer 102 is stated.Then side-edge type backlight is laterally emitted
Light is reflected upwards by reflector plate 107.
The light that reflector plate 107 can the issue light source 101 as a result, direction towards diffusion function layer 102 more as far as possible, i.e.,
To the external emission of the electronic equipment of the display device configured with the embodiment of the present invention, to improve the display brightness of display device.
LCD backlight module 1 can also include the optical waveguide layer 106 being arranged between reflector plate 107 and diffusion function layer 102.
It continues from the preceding paragraph description, optical waveguide layer 106 can convert area source for point light source, alternatively, can be further improved itself is face
The display homogeneity of light source.
In the embodiment that the light source 101 that such as Fig. 5 A to Fig. 5 B is illustrated is direct-light-type backlight, reflector plate 107, light source
101, optical waveguide layer 106 and diffusion function layer 102 can be sequentially stacked.I.e. in this embodiment, between optical waveguide layer 106 and reflector plate 107
Every being folded with light source 101 between the two.
In the embodiment that the light source 101 that such as Fig. 6 A to Fig. 6 B is illustrated is side-edge type backlight, reflector plate 107, leaded light
Layer 106 and diffusion function layer 102 can be sequentially stacked.Then in this embodiment, optical waveguide layer 106 and 107 phase of reflector plate are stacked.
In certain embodiments, LCD backlight module 1 further can also include lower brightness enhancement film 103 (DBEF, Down
Brightness Enhancement Film) and (UBEF, Up the Brightness Enhancement of upper brightness enhancement film 104
Film).As shown in Fig. 5 A to Fig. 6 B, using diffusion function layer 102 as reference, lower brightness enhancement film 103, upper brightness enhancement film 104 from lower and
On set gradually.
Specifically, lower brightness enhancement film 103 is located at the top of diffusion function layer 102.Upper brightness enhancement film 104 is located at lower brightness enhancement film 103
Top, that is, descend brightness enhancement film 103 between upper brightness enhancement film 104 and diffusion function layer 102.
Lower brightness enhancement film 103 and upper brightness enhancement film 104 are made of translucent material, with translucency.Lower brightness enhancement film 103 and upper
The luminous efficiency of back light system can be improved in brightness enhancement film 104.
Diffusion function layer 102 can make light that repeatedly refraction, reflection or scattering occur, to reach optics diffusion, uniform display
Effect.
In one embodiment, diffusion function layer 102 can be for PET (Polyetherimide, polyetherimide), PI
Diffusion layer of the translucent materials such as (polyimide, polyimide resin) as substrate is distributed on any one surface of substrate
Diffusion particle.I.e. diffusion function layer 102 can have diffusion barrier or diffusion sheet.
Certainly, diffusion function layer 102 can be not limited to the diffusion barrier or diffusion sheet of above-described embodiment.It is feasible at other
Embodiment in, as long as any one have or play optics spread layer, all can be diffusion function layer 102.
For example, diffusion particle is distributed in the surface of any one or two in lower brightness enhancement film 103 or upper brightness enhancement film 104,
Then descend brightness enhancement film 103 or upper brightness enhancement film 104 while playing respective function, it is possible to have or play the function of optics diffusion
Energy.
It, can also be with that is, diffusion function layer 102 is naturally not limited to diffusion barrier or a kind of diffusion sheet this structure
By structure known or already present in LCD backlight module 1, Lai Shixian optics diffusion function.
Further, the display device of the embodiment of the present invention can also include the TFT positioned at 1 top of LCD backlight module
(Thin Film Transistor, thin film transistor (TFT)) substrate 3, and between diffusion function layer 102 and TFT substrate 3
Collimate layer 2.
TFT substrate 3 is used to provide carrying and setting position for TFT circuit layer 4, can use any suitable existing structure
Make, such as the known embodiments of the offers such as Publication No. CN107275288A, CN105097667A, the embodiment of the present invention to this not
It limits.
Certainly, TFT substrate 3 can also be not limited to the above embodiments.In other feasible embodiments, TFT substrate 3 can be with
For light-transparent carrier made of plate or piece made of any translucent material of use, such as glass, or use PI, PET etc..
Collimation layer 2 is used for the light for making the light of diverging become collimation.The rambling light issued by back light 101
After collimating layer 2, the direction outgoing of lower brightness enhancement film 103 or upper brightness enhancement film 104 may be substantially perpendicular to.
Likewise, collimation layer 2 can also use any suitable existing construction, such as collimation layer 2 that can use fiber optic collimator
The various collimation schemes such as shutter collimating fashion of mode or hole array realize.
In the present embodiment, since collimation layer 2 is arranged between diffusion function layer 102 and TFT substrate 3, and since LCD is carried on the back
Optical module 1 includes above-mentioned a variety of layers of structure.The then positional relationship between TFT substrate 3 and LCD backlight module 1, with collimation layer 2
Change with the positional relationship of LCD backlight module 1.
As shown in Figure 1, collimation layer 2 can be set between LCD backlight module 1 and TFT substrate 3, LCD backlight module 1, standard
Straight layer 2 and TFT substrate 3 are cascading, that is, collimate the upper and lower surface of layer 2, carry on the back respectively with the lower surface of TFT substrate 3 and LCD
The upper surface of optical module 1 is bonded.Then at this point, TFT substrate 3 and LCD backlight module 1 separately, are folded with collimation layer between the two
2。
As shown in Fig. 2, collimation layer 2 can be implanted in LCD backlight module 1.Then at this point, LCD backlight module 1 can be with
TFT substrate 3 is stacked, i.e., the upper surface of LCD backlight module 1 is bonded with the lower surface of TFT substrate 3.
Since there are diffusion function layers 102 for LCD backlight module 1, the light that light source 101 issues upwards is through diffusion function layer 102
What can be become afterwards is unordered.Therefore, the collimation layer 2 for being collimated to light, at least should be along the propagation side of the light issued by light source 101
To the downstream for being located at diffusion function layer 102.
Therefore, when collimation layer 2 is implanted in LCD backlight module 1, as long as meeting collimation layer 2 is located at diffusion function layer 102
Top.
For example, as shown in fig. 5 a and fig. 6, collimation layer 2 can be set diffusion function layer 102 and lower brightness enhancement film 103 it
Between.At this point, using diffusion function layer 102 as reference, diffusion function layer 102, collimation layer 2, lower brightness enhancement film 103, upper brightness enhancement film 104
It is sequentially stacked from bottom to top.
Alternatively, as shown in Fig. 5 B and Fig. 6 B, collimation layer 2 can also be arranged in lower brightness enhancement film 103 and upper brightness enhancement film 104 it
Between.At this point, using diffusion function layer 102 as reference, diffusion function layer 102, lower brightness enhancement film 103, collimation layer 2, upper brightness enhancement film 104
It is sequentially stacked from bottom to top.
The display device of the embodiment of the present invention further can also include TFT circuit layer 4, liquid crystal layer 5, color filter film
6 and cover board 7.Wherein, TFT circuit layer 4, liquid crystal layer 5, color filter film 6 and cover board 7 may make up LCD display module.
Wherein, TFT substrate 3 is arranged in away from the side of collimation layer 2 in TFT circuit layer 4, and liquid crystal layer 5 is arranged in TFT circuit layer
4 deviate from the side of TFT substrate 3, and liquid crystal layer 5 is arranged in away from TFT circuit layer 4 in color filter film 6 (CF, Color filter)
The side that color filter film 6 deviates from liquid crystal layer 5 is arranged in side, cover board 7 (CP, Cover Plate).
I.e. TFT substrate 3, TFT circuit layer 4, liquid crystal layer 5, color filter film 6 and cover board 7 are set gradually from bottom to top.Into one
Step ground, TFT substrate 3, TFT circuit layer 4, liquid crystal layer 5, color filter film 6 and cover board 7 are sequentially stacked from bottom to top.
TFT substrate 3, TFT circuit layer 4, liquid crystal layer 5, color filter film 6 and cover board 7 can be using any appropriate existing
For construction to realize, the embodiment of the present invention is not construed as limiting this.
As shown in connection with fig. 3, TFT circuit layer 4 has the first transmission region 401 and non-transparent region 402.Wherein, first thoroughly
Light region 401 is used to issue for light source 101 and the collimated light after the collimation of collimated layer 2 passes through.
Fingerprint illuminant module 403 is set on non-transparent region 402, and fingerprint illuminant module 403 is for receiving simultaneously induction targets
Signal light.Echo signal light is that collimated light is reflected to form through the finger of 4 top of TFT circuit layer.
Specifically, the collimated light after the collimated collimation of layer 2 is after the first transmission region 401 reaches finger, it is downward by finger
Reflect to form echo signal light.Echo signal light can reach fingerprint illuminant module 403, to identify fingerprint.
TFT circuit layer 4 can be in film-form, and the fingerprint illuminant module 403 being arranged thereon can be integrated by TFT technique
Electronic component and circuit on non-transparent region 402.Specifically, grid material film can be sputtered in TFT substrate 3, pass through
Wiring pattern is formed after mask exposure, development, dry etching.Electronic component involved in fingerprint illuminant module 403 can
To include diode, triode, capacitor, resistance etc..
TFT circuit layer 4 can be conductively connected with external circuit, take this to realize fingerprint illuminant module 403 and external image
Processor signal connection.Fingerprint illuminant module 403 can receive from the reflected target letter of finger above TFT circuit layer 4
Number light, and echo signal light can be converted into electric signal, to generate fingerprint image.Fingerprint illuminant module 403 further may be used
The fingerprint image to be sent to the image processor of signal connection therewith, image processor carries out image procossing and obtains fingerprint letter
Number, and fingerprint recognition is carried out to fingerprint signal by algorithm.
First transmission region 401 of TFT circuit layer 4 can be for through the opening of the upper and lower surface of TFT circuit layer 4.At this point,
The part that TFT circuit layer 4 is located at open edge constitutes non-transparent region 402.
Alternatively, the partial region made of translucent material on the first transmission region 401 or TFT circuit layer 4.Specifically
, TFT circuit layer 4 may include the region made of translucent material, and the region made of light-proof material.Then by light transmission
Region made of material constitutes the first transmission region 401, and the region made of light-proof material constitutes non-transparent region
402。
Further, the liquid crystal control circuit for being controlled liquid crystal layer 5 is additionally provided on non-transparent region 402
404.Liquid crystal control circuit 404 can also be equally integrated on non-transparent region 402 using TFT technique.It should be noted that liquid
It is more mature technology that brilliant control circuit 404, which carries out control to liquid crystal layer 5, and therefore not to repeat here for the embodiment of the present invention.
In the present embodiment, cover board 7 has the second transmission region, is formed on the second transmission region for pressing for finger
Operating area.
Second transmission region can take up the entire upper surface of cover board 7.Cover board 7 is whole at this time can be by translucent material system
At the region that light can not penetrate is not present in upper surface.
Alternatively, the second transmission region can also only occupy the portion of upper surface of cover board 7.For example, cover board 7 may include by saturating
Central display area and the frame region made of light-proof material made of luminescent material.Wherein, which is
It may make up the second transmission region.
Also, some or all of composition of the second transmission region operating area.
Cover board 7 with the second transmission region is specifically as follows glass cover-plate or sapphire cover board.And the cover board 7 is upper
Matcoveredn can be set in surface.It should be understood that the pressing of finger can actually be finger pressing on cover board 7, or
Person, or finger presses on the protective layer that 7 upper surface of cover board is arranged in.
The principle that fingerprint recognition is carried out using the display device of the embodiment of the present invention is described below.
As shown in figure 4, finger presses the corresponding identification region of display device, it can be formed and be contacted with 7 upper surface of cover board.
Fingerprint ridge and 7 upper surface of cover board are in close contact.Back light 101 is issued via collimation layer 2 and TFT circuit layer 4
After the light of first transmission region 401 vertically upward encounters fingerprint ridge, the light of large scale is transmitted, and the light of small scale occurs anti-
It penetrates.Therefore, the corresponding 403 received light intensity of institute of fingerprint illuminant module vertical with fingerprint ridge is weaker.
There is the air gap among 7 upper surface of fingerprint valley and cover board, back light 101 is issued via collimation layer 2 and TFT circuit
The light of first transmission region 401 of layer 4 vertically upward encounters the interface of cover board 7 and air, and the even all of light of large scale can hang down
Directly it is reflected towards down.Therefore, the corresponding 403 received light intensity of institute of fingerprint illuminant module vertical with fingerprint valley is stronger.
The fingerprint illuminant module 403 being integrated on TFT circuit layer 4 as a result, can identify different luminous intensities, thus point
Distinguish that corresponding position is fingerprint ridge or fingerprint valley.The optical signal for not having to intensity can be converted into telecommunications by fingerprint illuminant module 403
Number, signal amplification and processing are carried out via control IC, restores the variation of the fingerprint valley or ridge of institute's pressing position, completes fingerprint letter
The acquisition of breath.
It can be seen that being made by the way that the fingerprint illuminant module 403 of fingerprint signal for identification to be integrated in TFT circuit layer 4
The even full frame fingerprint recognition of large area is possibly realized.And the integrated fingerprint illuminant module 403 in TFT circuit layer 4, compared to adopting
For preparing fingerprint chip with silicon-based optical fingerprint technique, preparation process is more simple, and consumables cost and process implementing cost are more
It is low, so that whole cost is greatly reduced.
In addition, each fingerprint sense can be made by the way that collimation layer 2 is arranged between TFT substrate 3 and diffusion function layer 102
Optical module 403 receives the fingerprint signal maximum intensity of vertical corresponding position, and receives adjacent position fingerprint signal intensity
It minimizes.In this way, the collimating effect that performance that can be achieved is excellent, image quality are higher.
With or configuration the embodiment of the present invention display device electronic equipment, without electronic equipment front cover plate,
Borehole in rear shell or side frame, without carrying out fingerprint mould group with screen to be bonded operation.Also, fingerprint illuminant module 403 is collected
It is thinner for preparing fingerprint chip using silicon-based optical fingerprint technique in Cheng Ping, be conducive to electronic equipment
It is lightening.
It should be noted that in the description of the present invention, term " first ", " second " etc. are used for description purposes only and distinguish
Similar object between the two and is not present sequencing, can not be interpreted as indication or suggestion relative importance.In addition,
In description of the invention, unless otherwise indicated, the meaning of " plurality " is two or more.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be apparent for a person skilled in the art
's.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to preceding claims and these
The full scope of the equivalent that claim is possessed determines.For comprehensive purpose, all articles and with reference to including patent
The disclosure of application and bulletin is all by reference to being incorporated herein.Appointing for theme disclosed herein is omitted in preceding claims
Where face is not intended to abandon the body matter, also should not be considered as applicant and the theme is not thought of as to disclosed hair
A part of bright theme.
Claims (12)
1. the display device of fingerprint recognition in a kind of achievable screen characterized by comprising
LCD backlight module, the diffusion function layer including light source and positioned at the light source side；
TFT substrate, positioned at the top of the LCD backlight module；
Layer is collimated, between the diffusion function layer and the TFT substrate；
The TFT substrate is set away from the TFT circuit layer of the collimation layer side, the TFT circuit layer has the first light transmission
Region and non-transparent region；First transmission region is used to issue for the light source and the collimation after the collimation layer collimation
Light passes through；Fingerprint illuminant module is set on the non-transparent region, and the fingerprint illuminant module is for receiving simultaneously induction targets letter
Number light, the echo signal light are that the collimated light is reflected to form through the finger above the TFT circuit layer.
2. display device as described in claim 1, which is characterized in that the TFT circuit layer deviates from the side of the TFT substrate
It is provided with liquid crystal layer；The liquid crystal control circuit for being controlled the liquid crystal layer is additionally provided on the non-transparent region.
3. display device as claimed in claim 2, which is characterized in that the liquid crystal layer deviates from the side of the TFT circuit layer
It is provided with color filter film, the color filter film is provided with cover board away from the side of the liquid crystal layer, and the cover board has the
Two transmission regions are formed on second transmission region for the operating area for finger pressing.
4. display device as described in claim 1, which is characterized in that the LCD backlight module, the collimation layer and described
TFT substrate is cascading；That is, the collimation layer is arranged between the LCD backlight module and the TFT substrate.
5. display device as described in claim 1, which is characterized in that the collimation layer is implanted in the LCD backlight module,
The LCD backlight module and the TFT substrate are stacked.
6. display device as described in claim 1, which is characterized in that the LCD backlight module further includes lower brightness enhancement film, described
Lower brightness enhancement film is located at the top of the diffusion function layer；
The collimation layer is arranged between the diffusion function layer and the lower brightness enhancement film.
7. display device as described in claim 1, which is characterized in that the LCD backlight module further includes lower brightness enhancement film and upper
Brightness enhancement film, the lower brightness enhancement film is between the upper brightness enhancement film and the diffusion function layer；
The collimation layer is arranged between the lower brightness enhancement film and the upper brightness enhancement film.
8. display device as described in claim 1, which is characterized in that the light source is to be arranged below the diffusion function layer
Area source；
The LCD backlight module further includes reflector plate, and the lower section of the area source, and the reflector plate is arranged in the reflector plate
It is stacked with the area source.
9. display device as described in claim 1, which is characterized in that the side of the diffusion function layer is arranged in the light source
Face；
The LCD backlight module further includes reflector plate, and the lower section of the diffusion function layer is arranged in the reflector plate, and described anti-
Piece is penetrated to set with diffusion function stacking.
10. display device as claimed in claim 8 or 9, which is characterized in that the LCD backlight module further includes optical waveguide layer, institute
Optical waveguide layer is stated to be arranged between the reflector plate and the diffusion function layer.
11. display device as described in claim 1, which is characterized in that the fingerprint illuminant module is integrated by TFT technique
Electronic component and circuit on the non-transparent region.
12. display device as described in claim 1, which is characterized in that
First transmission region is the opening of the upper and lower surface through the TFT circuit layer；Alternatively,
First transmission region is the partial region made of translucent material on the TFT circuit layer.
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| CN201910052087.XA CN109633959A (en) | 2019-01-21 | 2019-01-21 | The display device of fingerprint recognition in shielding can be achieved |
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|---|---|---|---|
| CN201910052087.XA CN109633959A (en) | 2019-01-21 | 2019-01-21 | The display device of fingerprint recognition in shielding can be achieved |
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| CN201910052087.XA Pending CN109633959A (en) | 2019-01-21 | 2019-01-21 | The display device of fingerprint recognition in shielding can be achieved |
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