CN110262101A - Display module and its driving method, display device - Google Patents
Display module and its driving method, display device Download PDFInfo
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- CN110262101A CN110262101A CN201910356847.6A CN201910356847A CN110262101A CN 110262101 A CN110262101 A CN 110262101A CN 201910356847 A CN201910356847 A CN 201910356847A CN 110262101 A CN110262101 A CN 110262101A
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- backlight
- display
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- fingerprint identification
- brightness
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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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- 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
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal Display Device Control (AREA)
- Image Input (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of display module and its driving methods, display device, display module includes the display panel and backlight module being oppositely arranged, display panel includes non-fingerprint identification area and fingerprint identification area, backlight module includes the first backlight area and the second backlight area, the first backlight Qu Yufei fingerprint identification area is oppositely arranged on the direction of plane where perpendicular to display panel, and the second backlight area is oppositely arranged with fingerprint identification area；There are overlapping regions in the orthographic projection of the orthographic projection of plane where display panel and second backlight area plane where display panel for non-fingerprint identification area；Display module further includes control module, and when detecting the display brightness unevenness of the overlapping region, control module adjusts the display brightness of the overlapping region by adjusting the gray scale voltage of the overlapping region.The present invention is not only able to improve the penetrance of fingerprint identification area, does not influence the whole display of display module also.
Description
Technical field
The present invention relates to field of display technology, fill more particularly, to a kind of display module and its driving method, display
It sets.
Background technique
With the rapid development of display technology, the display panel with fingerprint identification function has gradually spread the life of people
In work, fingerprint recognition is widely used in the display screen of the electronic equipments such as mobile phone, personal digital assistant, computer.Fingerprint is
Human body is inherent unique and the invariant features that can distinguish with other people, it by finger tip skin surface series of ridges and
Paddy composition, the composition details of these ridges and paddy generally include the bifurcated of ridge, the end of ridge, arch, the arch of tent-type, it is left-handed,
The details such as dextrorotation, spiral or bispin, these Details uniqueness of fingerprint pattern.
Currently, usually combine fingerprint identification technology with display technology, so that display panel not only has display function,
Fingerprint recognition can also be carried out, to enrich the function of display panel, while improving the safety of information in display device
Energy.Further, optical fingerprint identification technology is combined with display technology, fingerprint identification region can be made to be located at viewing area, gram
Taken the lower problem of the screen accounting that display panel caused by non-display area is arranged in fingerprint identification region, at the same avoid by
Fingerprint identification region is caused for experiencing poor problem when the back side of display panel is arranged in.
Optical fingerprint identification is applied to the display panel that one important difficult point of LCD technology is liquid crystal display
Interior fingerprint identification region needs to be arranged photo cell, inevitably makes fingerprint identification region in the display panel in this way
Penetrance reduces, and is not able to satisfy the display requirement of product so as to cause liquid crystal display.
Summary of the invention
In view of this, the present invention provides a kind of display module and its driving methods, display device.
On the one hand, the present invention provides a kind of display modules, which is characterized in that including the display panel and back being oppositely arranged
Optical mode group, the display panel include non-fingerprint identification area and fingerprint identification area, the backlight module include the first backlight area and
Second backlight area, first backlight area and the non-fingerprint recognition on the direction of plane where perpendicular to the display panel
Area is oppositely arranged, and second backlight area is oppositely arranged with the fingerprint identification area；
The non-fingerprint identification area is in the orthographic projection of plane where the display panel with second backlight area described
There are overlapping regions for the orthographic projection of plane where display panel；
The display module further includes control module, described when detecting the display brightness unevenness of the overlapping region
Control module adjusts the display brightness of the overlapping region by adjusting the gray scale voltage of the overlapping region.
On the one hand, the present invention provides a kind of driving methods of display module, applied to above-mentioned display module, including step
It is rapid:
Display module is provided, the display module includes the display panel and backlight module being oppositely arranged, the display surface
Plate includes fingerprint identification area and non-fingerprint identification area, and the backlight module includes the first backlight area and the second backlight area, vertical
First backlight area is oppositely arranged with the non-fingerprint identification area on the direction of plane where the display panel, and described the
Two backlight areas are oppositely arranged with the fingerprint identification area；Positive throwing of the non-fingerprint identification area in plane where the display panel
In the orthographic projection of plane where the display panel, there are overlapping regions with second backlight area for shadow；
The display module further includes control module；
When detecting the display brightness unevenness of the overlapping region, the control module is by adjusting the overlapping region
Gray scale voltage adjust the display brightness of the overlapping region.
On the other hand, the present invention also provides a kind of display devices, including above-mentioned display module.
Compared with prior art, display module provided by the invention and its driving method, display device, at least realize as
Under the utility model has the advantages that
Display module of the invention includes the display panel and backlight module being oppositely arranged, and the display panel includes non-finger
Line cog region and fingerprint identification area, the backlight module includes the first backlight area and the second backlight area, perpendicular to the display
First backlight area is oppositely arranged with the non-fingerprint identification area on the direction of plane where panel, second backlight area and
The fingerprint identification area is oppositely arranged；The non-fingerprint identification area is in the orthographic projection of plane where the display panel and described the
In the orthographic projection of plane where the display panel, there are overlapping regions in two backlight areas；The display module further includes control mould
Block, when detecting the display brightness unevenness of the overlapping region, the control module passes through the ash for adjusting the overlapping region
Rank voltage adjusts the display brightness of the overlapping region.Present invention plane where display panel by non-fingerprint identification area
Overlapping region is arranged in orthographic projection and the orthographic projection of second backlight area plane where display panel, then adjusts institute by control module
The gray scale voltage of overlapping region is stated to adjust the display brightness of overlapping region, is not only able to improve the penetrance of fingerprint identification area,
The whole display of display module is not influenced also.
Certainly, implementing any of the products of the present invention specific needs while must not reach all the above technical effect.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the planar structure schematic diagram of display panel in the prior art；
Fig. 2 is a kind of planar structure schematic diagram of display module provided by the invention；
Fig. 3 be in Fig. 2 A-A to sectional view；
Fig. 4 is the gamma curve figure that a kind of control module provided by the invention adjusts gray scale voltage；
Fig. 5 is the planar structure schematic diagram of display panel in the display module of Fig. 2；
Fig. 6 is the planar structure schematic diagram of backlight module in the display module of Fig. 2；
Fig. 7 is another planar structure schematic diagram of backlight module in the display module of Fig. 2；
Fig. 8 be in Fig. 2 another A-A to sectional view；
Fig. 9 is the partial enlarged view of fingerprint identification unit driving circuit；
Figure 10 be in Fig. 2 A-A to another sectional view；
Figure 11 is a kind of production method flow chart of display panel provided by the invention；
Figure 12 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
It is the planar structure schematic diagram of display panel in the prior art with reference to Fig. 1, Fig. 1.Wherein display panel 00 includes aobvious
Showing area 01 and the non-display area 02 around viewing area 01, display panel 00 includes fingerprint identification area 03 and non-fingerprint identification area 04,
Photo cell 06 is equipped in fingerprint identification area 03, since photo cell 06 is setting in non-open region while needing to occupy certain
Space, then the opening of fingerprint identification area 03 will reduce accordingly, and fingerprint identification area 03 and non-fingerprint in the prior art
05 opening area of pixel in cog region 04 be again it is identical, then reduce opening for fingerprint identification area and non-fingerprint identification area simultaneously
Mouth rate reduces the penetrance of entire display panel 00 to reduce the whole aperture opening ratio of display panel 00, final to influence
The whole display effect of display panel 00, is not able to satisfy the display requirement of product.
In order to solve the above-mentioned technical problems, the present invention provides a kind of display module and its driving methods, display device.It closes
In the embodiment of display module provided by the invention, it is discussed further below.
It is a kind of planar structure schematic diagram of display module provided by the invention with reference to Fig. 2, Fig. 2；Fig. 3 be in Fig. 2 A-A to
Sectional view.Display module 100 includes the viewing area AA and non-display area BB for surrounding viewing area AA in Fig. 3, and display module 100 is wrapped
The display panel P and backlight module BLU being oppositely arranged are included, display panel P includes non-fingerprint identification area 1 and fingerprint identification area 2, back
Optical mode group BLU includes the first backlight area 3 and the second backlight area 4, where perpendicular to the display panel the on the direction X of plane
One backlight area 3 is oppositely arranged with non-fingerprint identification area 1, and the second backlight area 4 is oppositely arranged with fingerprint identification area 2；Non- fingerprint recognition
Area 1, which exists in the orthographic projection of plane where display panel P and the second backlight area 4 in the orthographic projection of plane where display panel P, hands over
Folded region 5；Display module 100 further includes control module 6, when detecting the display brightness unevenness of overlapping region 5, control module
6 adjust the display brightness of overlapping region 5 by adjusting the gray scale voltage of overlapping region 5.
From the figure 3, it may be seen that the second backlight area 4 is not identical with the size of fingerprint identification area 2, that is, be parallel to display
On in-plane where panel P, the area in the second backlight area 4 is greater than the area of fingerprint identification area 2, this is because in order to carry on the back
Light Anawgy accuracy considers, if the second backlight area 4 is less than or equal to the area of fingerprint identification area 2, existing in backlight fitting can not
When the error avoided, it will appear obvious light and shade in the adjacent region of fingerprint identification area 2 and non-fingerprint identification area 1 and distinguish boundary
Limit, so the second backlight area 4 is arranged greatly than corresponding fingerprint identification area 2, for the brightness disproportionation feelings in overlapping region 5
Condition is by control module 6 come adjusting display brightness.
Optionally, display panel P is liquid crystal display panel, or may be that other need backlight assembly 20 to provide light source
Display panel, the application is not limited thereto.When display panel is liquid crystal display panel, display panel is included in first
The color membrane substrates and array substrate being oppositely arranged on direction, and the liquid crystal layer being set between color membrane substrates and array substrate
(not shown), it includes black matrix and color film layer, backlight module P offer on color membrane substrates that liquid crystal layer is interior, which to be equipped with liquid crystal molecule,
Light source.
Control module 6 may be provided at the following frame region of non-display area BB, as shown in Figure 2, it is to be appreciated that control mould
Block 6 is electrically connected by cabling with the pixel in display panel P, is not shown here.
Backlight module BLU can not be done have here using side-edge type backlight or using direct-light-type backlight
Body limits.
Display brightness for detecting overlapping region 5 can use external detection equipment with the presence or absence of uneven method,
Detection unit can be separately provided in display panel P, be not specifically limited here.It is mentioned here to detect overlapping region 5
Display brightness not may each be the situation for detecting that local location in overlapping region 5 has display brightness unevenness, be also possible to hand over
There are display brightness unevenness compared with whole viewing area AA for the whole display brightness in folded region 5, such as the display brightness of overlapping region 5
Greater than the brightness in non-overlapping region, it is not specifically limited here.
Fingerprint identification area 2 is only to illustrate in Fig. 2, and it can also be half screen that actually fingerprint identification area 2, which can be 1/4 screen,.?
It is exactly fingerprint identification area 2 and viewing area AA least partially overlapped, when fingerprint identification area 2 is 1/4 screen or half screen, fingerprint identification area
2 partly overlap with viewing area AA, and the fingerprint identification function of the part of display panel P can be realized by fingerprint identification area 2, reduce
The wiring of photo cell in fingerprint identification area 2 is conducive to production.Furthermore fingerprint identification area 2 can may be circle for rectangle, only
Meet non-fingerprint identification area 1 to put down where display panel P in the orthographic projection of plane where display panel P and the second backlight area 4
There are overlapping regions 5 for the orthographic projection in face.
Display module in the present embodiment, at least has the following technical effect that:
Non- fingerprint identification area 1 is being shown in the orthographic projection of plane where display panel P and the second backlight area 4 in the present embodiment
There are overlapping region 5, display module 100 further includes control module 6 for the orthographic projection of plane where panel P, when detecting crossover region
When the display brightness unevenness in domain 5, control module 6 adjusts the display of overlapping region 5 by adjusting the gray scale voltage of overlapping region 5
Brightness, due to non-fingerprint identification area 1 and there are overlapping regions 5 in the second backlight area 4, that is, be parallel to where display panel P
In-plane on the area in region in the second backlight area 4 be greater than the area of fingerprint identification area 2, at this time in the second backlight area 4
Backlight illumination can be greater than the backlight illumination in the first backlight area 3, the pixel aperture ratio in fingerprint identification area 2 can be less than non-finger
The pixel aperture ratio of line cog region 1, the present invention adjust the gray scale voltage of overlapping region 5 by control module 6 to adjust crossover region
The display brightness in domain 5 is not only able to meet the requirement of transmitance, additionally it is possible to which the uniformity for realizing display brightness does not influence to show
The whole display of mould group.
In some alternative embodiments, control module 6 adjusts crossover region by adjusting the gray scale voltage of overlapping region 5
The display brightness in domain 5, comprising:
Calculate brightness disproportionation factor x, comprising: x=LA/LB, wherein LAFor the display brightness of the overlapping region, LBFor except
The brightness of part other than the overlapping region；
Calculate brightness regulation factor a, comprising: a=1/x；
The brightness regulation factor is input in a gamma curve, ordinate of the brightness regulation factor as gamma curve, phase
The abscissa that should be obtained is gray scale voltage adjusted.
In some alternative embodiments, gamma curve is 2.2 curve of gamma.Certainly the gal of the gamma curve in the present invention
Horse value can also be set as other values, in the present invention only by taking 2.2 curve of gamma as an example.
It is the gamma curve figure that a kind of control module provided by the invention adjusts gray scale voltage with reference to Fig. 4, Fig. 4.It illustrates
Bright control module 6 adjusts the display brightness of the overlapping region by adjusting the gray scale voltage of overlapping region 5:
When display module shows grayscale L255, pass through the detection unit carried in external detection equipment or display panel
Detect the brightness disproportionation of local location in overlapping region 5, and brightness is higher by the position 20% that brightness is, then it is calculated bright
Spend uneven factor x=1.2, then calculate brightness regulation factor a=1/1.2=0.83, according to gamma curve 2.2, brightness regulation because
Ordinate of the sub- a as gamma curve 2.2, as can be known from Fig. 4 the corresponding grayscale of the brightness regulation factor 0.83 of grayscale L255 be
L235 is to get being L235 gray scale voltage to voltage actual when showing the white picture of L255 adjusted.
Control module 6 adjusts the gray scale voltage of overlapping region 5 by the above method to adjust overlapping region in the present invention
Display brightness enables to the display picture brightness of display module more evenly.
In some alternative embodiments, referring to Fig. 2 and Fig. 5, Fig. 5 is the plane of display panel in the display module of Fig. 2
Structural schematic diagram, the pixel aperture ratio of fingerprint identification area 2 is less than the pixel aperture ratio of non-fingerprint identification area 1 in Fig. 5.
Display panel P in Fig. 5 includes the viewing area AA and non-display area BB for surrounding viewing area AA, includes in the AA of viewing area
Pixel 7, pixel 7 include sub-pixel R, G, B, and viewing area AA includes fingerprint identification area 2 and non-fingerprint identification area 1, in fingerprint recognition
It further include photo cell 8 in area 2, as can be seen from Figure 5 the pixel aperture ratio of fingerprint identification area 2 is less than non-fingerprint identification area 1
Pixel aperture ratio.
It can be understood that the display panel P in Fig. 5 is a part of display module, display module as shown in Figure 2 is also wrapped
Backlight module BLU is included, backlight module BLU includes the first backlight area 3 and the second backlight area 4, perpendicular to the display panel institute
The first backlight area 3 is oppositely arranged with non-fingerprint identification area 1 on the direction X of plane, the second backlight area 4 and 2 phase of fingerprint identification area
To setting；Non- fingerprint identification area 1 is put down where display panel P in the orthographic projection of plane where display panel P and the second backlight area 4
There are overlapping regions 5 for the orthographic projection in face；Display module 100 further includes control module 6, when the display for detecting overlapping region 5 is bright
When degree is uneven, control module 6 adjusts the display brightness of overlapping region 5 by adjusting the gray scale voltage of overlapping region 5.
The orthographic projection of plane and the second backlight area 4 are in display panel P as where non-fingerprint identification area 1 in display panel P
There are overlapping regions 5 for the orthographic projection of place plane；Display module 100 further includes control module 6, when detecting overlapping region 5
When display brightness unevenness, control module 6 adjusts the display brightness of overlapping region 5 by adjusting the gray scale voltage of overlapping region 5,
Pass through the pixel aperture ratio less than non-fingerprint identification area 1 that the pixel aperture ratio of fingerprint identification area 2 is arranged, energy in the present embodiment
The transmitance of viewing area AA is enough improved, and can be realized the uniformity of display brightness, the entirety for not influencing display module 100 is aobvious
Show.
It is the planar structure schematic diagram of backlight module in the display module of Fig. 2 in conjunction with Fig. 2, Fig. 3, Fig. 5 and Fig. 6, Fig. 6；Fig. 6
In the backlight illumination in the first backlight area 3 be L1, the backlight illumination in the second backlight area 4 is L2, wherein L1 < L2；First backlight area 3
Go out penetrance of the light Jing Guo non-fingerprint identification area 1 be T1, the second backlight area 4 out penetrance of the light Jing Guo fingerprint identification area 2
For T2, wherein T1 > T2；And T1 × L1=T2 × L2.
With reference to Fig. 2, Fig. 5 and Fig. 6, display module 100 includes the display panel P and backlight module being oppositely arranged in Fig. 3
BLU, display panel P include non-fingerprint identification area 1 and fingerprint identification area 2, and backlight module BLU includes the first backlight area 3 and second
Backlight area 4, the first backlight area 3 is set relatively with non-fingerprint identification area 1 on the direction X of plane where perpendicular to the display panel
It sets, the second backlight area 4 is oppositely arranged with fingerprint identification area 2；Orthographic projection of the non-fingerprint identification area 1 in plane where display panel P
In the orthographic projection of plane where display panel P, there are overlapping regions 5 with the second backlight area 4；Display module 100 further includes control mould
Block 6, when detecting the display brightness unevenness of overlapping region 5, control module 6 by adjust overlapping region 5 gray scale voltage come
Adjust the display brightness of overlapping region 5.The pixel that the pixel aperture ratio of fingerprint identification area 2 is less than non-fingerprint identification area 1 in Fig. 5 is opened
Mouthful rate, the backlight illumination in the first backlight area 3 is L1 in Fig. 6, and the backlight illumination in the second backlight area 4 is L2, and L1 < L2；First back
The penetrance of the light Jing Guo non-fingerprint identification area 1 that go out in light area 3 is T1, and the second backlight area 4 goes out light wearing by fingerprint identification area 2
Saturating rate is T2, wherein T1 > T2；And T1 × L1=T2 × L2.
The pixel aperture ratio of fingerprint identification area and non-fingerprint identification area is identical in the prior art, and will be non-in the present invention
The pixel aperture ratio of fingerprint identification area can be left normal aperture opening ratio, to not influence the normal display of non-fingerprint identification area 1.
Furthermore pass through the backlight illumination L2 of the backlight illumination L1 less than the second backlight area 4 in the first backlight area 3, the first backlight area
3 penetrance of the light Jing Guo non-fingerprint identification area 1 that go out is light the wearing by fingerprint identification area 2 out that T1 is greater than the second backlight area 4
Saturating rate is T2, and the orthographic projection of plane and the second backlight area 4 are in display panel P as where non-fingerprint identification area 1 in display panel P
There are overlapping regions 5 for the orthographic projection of place plane, so the brightness in overlapping region 5 is T1 × L2, due to L1 < L2, T1 >
T2, in order to not influence normal display, is adjusted so the brightness in overlapping region 5 is above non-overlapping region by control module 6
The gray scale voltage of section overlapping region 5 makes itself and the display brightness phase in non-overlapping region to adjust the display brightness of overlapping region 5
Together, the display brightness of final display module is uniform.The present invention is not only able to meet the requirement of transmitance, additionally it is possible to realize that display is bright
Degree uniformly, does not influence the whole display of display module.
Referring to Fig. 7 and Fig. 8, Fig. 7 is another planar structure schematic diagram of backlight module in the display module of Fig. 2, and Fig. 8 is
Another A-A is to sectional view in Fig. 2.Display panel P includes incidence surface In and light-emitting surface Out in Fig. 8, incidence surface In and light-emitting surface
Out intersection；Backlight module BLU includes the first luminescence component 91, and the first luminescence component 91 is located at the side of incidence surface In；In Fig. 7
Backlight module BLU includes light guide plate 92, and the dot density of light guide plate 92 is guide-lighting lower than in the second backlight area 4 in the first backlight area 3
The dot density of plate 92.
Optionally, incidence surface In and light-emitting surface Out are perpendicular.Backlight module BLU is using side-edge type backlight at this time.
The specific structure of backlight module BLU is not shown in the figure, optional includes reflector plate, the light guide plate, expansion of upper setting in X direction
Discrete piece, lower prismatic lens and upper prismatic lens, the first luminescence component are located at the edge of backlight, that is, the first luminescence component be located at into
The side of smooth surface, the light that the first luminescence component issues are absorbed after entering light guide plate, spread again by the site on light guide plate, break
Internal communication caused by bad total reflection, is projected, the first luminescence component can after being uniformly distributed light from the front of the first luminescence component
Cold-cathode tube fluorescent lamp, light emitting diode or electroluminor are selected, specific limit is not done to the type of the first luminescence component here
It is fixed.
The non-fingerprint identification area orthographic projection of plane and second backlight where display panel in some alternative embodiments
There are overlapping regions for the orthographic projection of area's plane where display panel, for the consideration of backlight Anawgy accuracy, the face in the second backlight area 4
Product is greater than the area of fingerprint identification area 2, if the second backlight area 4 is less than or equal to the area of fingerprint identification area 2, pastes in backlight
Conjunction will appear obvious there are when inevitable error in the adjacent region of fingerprint identification area 2 and non-fingerprint identification area 1
Light and shade distinguishing limit, so the second backlight area 4 is arranged than corresponding fingerprint identification area 2 greatly, in overlapping region 5
Brightness disproportionation situation by control module 6 come adjusting display brightness, referring to Fig. 8, in some alternative embodiments, the second backlight
The width of area 4 in a second direction is 100~200um bigger than the width of fingerprint identification area 2 in a second direction, in this section
Not only can satisfy backlight Anawgy accuracy easy to accomplish can also carry out brightness regulation to overlapping region 5.
Dot density in the present embodiment by light guide plate 92 in the first backlight area 3 is lower than light guide plate in the second backlight area 4
92 dot density makes the backlight illumination L1 in the first backlight area 3 less than the backlight illumination L2 in the second backlight area 4, i.e. L1 < L2,
The penetrance of the light Jing Guo non-fingerprint identification area 1 that go out in the first backlight area 3 is that T1 is greater than the light out in the second backlight area 4 by fingerprint knowledge
The penetrance in other area 2 is T2, and the orthographic projection of plane and the second backlight area 4 exist as where non-fingerprint identification area 1 in display panel P
There are overlapping regions 5 for the orthographic projection of plane where display panel P, so the brightness in overlapping region 5 is T1 × L2, due to L1 <
L2, T1 > T2, in order to not influence normal display, pass through control so the brightness in overlapping region 5 is above non-overlapping region
The gray scale voltage that module 6 adjusts overlapping region 5 makes itself and the display in non-overlapping region to adjust the display brightness of overlapping region 5
Brightness is identical, and the display brightness of final display module is uniform.The present invention is not only able to meet the requirement of transmitance, additionally it is possible to realize
Display brightness is uniform, does not influence the whole display of display module.
Referring to Fig. 9, Fig. 9 is another planar structure schematic diagram of backlight module in the display module of Fig. 2.Backlight in Fig. 9
Mould group BLU includes the second luminescence component 93 and third luminescence component 94 of multiple array arrangements；Second luminescence component 93 is located at the
In one backlight area 3, third luminescence component 94 is located in the second backlight area 4, wherein the arrangement density of the second luminescence component 93 is less than
The arrangement density of third luminescence component 94.
It is not shown in certain Fig. 9 using the backlight module BLU specific structure of direct-light-type backlight, optionally includes: to hang down
Directly in reflector plate, light guide plate, diffusion sheet, lower prismatic lens and upper prismatic lens on the direction of display panel, wherein set on reflector plate
The second luminescence component 93 and third luminescence component 94 are set, the structure of backlight module is not specifically limited here.Optional
Two luminescence components 93 and third luminescence component 94 select mini-LED, are not specifically limited here.Optionally, it is used in Fig. 9
It does not include light guide plate in the backlight module of direct-light-type backlight.The specific setting needs of backlight module are decided according to the actual requirements.
Since the arrangement density of the second luminescence component 93 is less than the arrangement density of third luminescence component 94, so that the first backlight
The backlight illumination L1 in area 3 passes through non-finger less than the backlight illumination L2 in the second backlight area 4, i.e. L1 < L2, the light that goes out in the first backlight area 3
The penetrance of line cog region 1 is that penetrance of the light Jing Guo fingerprint identification area 2 that go out that T1 is greater than the second backlight area 4 is T2, due to non-
Fingerprint identification area 1 the orthographic projection of plane where display panel P and the second backlight area 4 plane where display panel P positive throwing
There are overlapping regions 5 for shadow, so the brightness in overlapping region 5 is T1 × L2, due to L1 < L2, T1 > T2, so overlapping region 5
Interior brightness is above non-overlapping region, and in order to not influence normal display, the ash of overlapping region 5 is adjusted by control module 6
Rank voltage keeps it identical as the display brightness in non-overlapping region to adjust the display brightness of overlapping region 5, final display module
Display brightness it is uniform.The present invention is not only able to meet the requirement of transmitance, additionally it is possible to realize that display brightness is uniform, not influence to show
Show the whole display of mould group.
0, Figure 10 is another planar structure schematic diagram of backlight module in the display module of Fig. 2 referring to Fig.1.It is carried on the back in Figure 10
Optical mode group BLU includes the second luminescence component 93 and third luminescence component 94 of multiple array arrangements；Second luminescence component 93 is located at
In first backlight area 3, third luminescence component 94 is located in the second backlight area 4, is passed through the electric current of the second luminescence component 93 less than
The electric current of three luminescence components 94.
It is not shown in certain Figure 10 using the backlight module BLU specific structure of direct-light-type backlight, optionally includes: to hang down
Directly in reflector plate, light guide plate, diffusion sheet, lower prismatic lens and upper prismatic lens on the direction of display panel, wherein set on reflector plate
The second luminescence component 93 and third luminescence component 94 are set, the structure of backlight module is not specifically limited here.Optional
Two luminescence components 93 and third luminescence component 94 select mini-LED, are not specifically limited here.Optionally, it is used in Figure 10
It does not include light guide plate in the backlight module of direct-light-type backlight.The specific setting needs of backlight module are decided according to the actual requirements.
The second luminescence component 93 and third luminescence component 94 in Figure 10 in direct-light-type backlight can be controlled separately its brightness.
Since the electric current of the second luminescence component 93 is less than the electric current of third luminescence component 94, so that the back in the first backlight area 3
Brightness L1 passes through non-fingerprint recognition less than the backlight illumination L2 in the second backlight area 4, i.e. L1 < L2, the light that goes out in the first backlight area 3
The penetrance in area 1 is that penetrance of the light Jing Guo fingerprint identification area 2 that go out that T1 is greater than the second backlight area 4 is T2, since non-fingerprint is known
Other area 1 exists in the orthographic projection of plane where display panel P and the second backlight area 4 in the orthographic projection of plane where display panel P
Overlapping region 5, so the brightness in overlapping region 5 is T1 × L2, due to L1 < L2, T1 > T2, so bright in overlapping region 5
Degree is above non-overlapping region, and in order to not influence normal display, the gray scale voltage of overlapping region 5 is adjusted by control module 6
Keep it identical as the display brightness in non-overlapping region to adjust the display brightness of overlapping region 5, the display of final display module
Brightness uniformity.
The present invention is not only able to meet the requirement of transmitance, additionally it is possible to realize that display brightness is uniform, not influence display module
Whole display.
Based on same invention thought, the invention also discloses a kind of driving methods of display module, applied to above-mentioned display
Mould group, 1, Figure 11 is a kind of flow chart of the driving method of display module provided by the invention referring to Fig.1, the driving side in Figure 11
Method the following steps are included:
Step S1: display module is provided, display module includes the display panel and backlight module being oppositely arranged, display panel
Including fingerprint identification area and non-fingerprint identification area, backlight module includes the first backlight area and the second backlight area, perpendicular to display
The first backlight Qu Yufei fingerprint identification area is oppositely arranged on the direction of plane where panel, the second backlight area and fingerprint identification area phase
To setting；Non- fingerprint identification area is in the orthographic projection of plane where display panel and second backlight area plane where display panel
There are overlapping regions for orthographic projection；Display module further includes control module；
Step S2: when detecting the display brightness unevenness of overlapping region, control module passes through the ash for adjusting overlapping region
Rank voltage adjusts the display brightness of overlapping region.
It can be understood that Fig. 2 any structure into Figure 10 can be used in the structure of display module, does not do have here
Body limits.
In some alternative embodiments, control module is adjusted by adjusting the gray scale voltage of the overlapping region
The display brightness of the overlapping region, the specific method is as follows:
Calculate brightness disproportionation factor x, comprising: x=LA/LB, wherein LAFor the brightness of the overlapping region, LBFor except described
The brightness at part other than overlapping region；
Calculate brightness regulation factor a, comprising: a=1/x；
The brightness regulation factor is input in a gamma curve, the brightness regulation factor is as the vertical of gamma curve
Coordinate, the abscissa accordingly obtained are gray scale voltage adjusted.
2.2 curve of gamma can be used in optional gamma curve.The ash of the adjusting overlapping region is passed through for control module
Rank voltage has been described in detail to adjust the specific method of the display brightness of the overlapping region in above-described embodiment, here no longer to meter
Calculation process is specifically limited.
The present invention adjusts the gray scale voltage of overlapping region to adjust the display brightness of overlapping region, not only by control module
It can satisfy the requirement of transmitance, additionally it is possible to realize the uniformity of display brightness, not influence the whole display of display module.
Based on same invention thought, the present invention also provides a kind of display devices.2, Figure 12 is offer of the present invention referring to Fig.1
A kind of display device with any of the above-described display module.As shown in figure 12, which includes the present invention
The display module 100 that any embodiment provides, further includes the electronic components such as camera.Display device provided in an embodiment of the present invention
It can be any electronic product with display function flexible, including but not limited to following classification: television set, notebook electricity
Brain, desktop displays, tablet computer, digital camera, mobile phone, Intelligent bracelet, intelligent glasses, Vehicular display device, Medical Devices,
Industrial control equipment, touch interactive terminal etc..
Through the foregoing embodiment it is found that display module provided by the invention and its driving method, display device, are at least realized
It is following the utility model has the advantages that
Display module of the invention includes the display panel and backlight module being oppositely arranged, and the display panel includes non-finger
Line cog region and fingerprint identification area, the backlight module includes the first backlight area and the second backlight area, perpendicular to the display
First backlight area is oppositely arranged with the non-fingerprint identification area on the direction of plane where panel, second backlight area and
The fingerprint identification area is oppositely arranged；The non-fingerprint identification area is in the orthographic projection of plane where the display panel and described the
In the orthographic projection of plane where the display panel, there are overlapping regions in two backlight areas；The display module further includes control mould
Block, when detecting the display brightness unevenness of the overlapping region, the control module passes through the ash for adjusting the overlapping region
Rank voltage adjusts the display brightness of the overlapping region.Present invention plane where display panel by non-fingerprint identification area
Overlapping region is arranged in orthographic projection and the orthographic projection of second backlight area plane where display panel, then adjusts institute by control module
The gray scale voltage of overlapping region is stated to adjust the display brightness of overlapping region, is not only able to improve the penetrance of fingerprint identification area,
The whole display of display module is not influenced also.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (11)
1. a kind of display module, which is characterized in that including the display panel and backlight module being oppositely arranged, the display panel packet
Non- fingerprint identification area and fingerprint identification area are included, the backlight module includes the first backlight area and the second backlight area, perpendicular to institute
First backlight area is oppositely arranged with the non-fingerprint identification area on the direction of plane where stating display panel, second back
Light area is oppositely arranged with the fingerprint identification area；
The non-fingerprint identification area is in the orthographic projection of plane where the display panel and second backlight area in the display
There are overlapping regions for the orthographic projection of plane where panel；
The display module further includes control module, when detecting the display brightness unevenness of the overlapping region, the control
Module adjusts the display brightness of the overlapping region by adjusting the gray scale voltage of the overlapping region.
2. display module according to claim 1, which is characterized in that the control module is by adjusting the overlapping region
Gray scale voltage adjust the display brightness of the overlapping region, comprising:
Calculate brightness disproportionation factor x, comprising: x=LA/LB, wherein LAFor the display brightness of the overlapping region, LBFor except the friendship
The brightness of part other than folded region；
Calculate brightness regulation factor a, comprising: a=1/x；
The brightness regulation factor is input in a gamma curve, vertical seat of the brightness regulation factor as gamma curve
Mark, the abscissa accordingly obtained are gray scale voltage adjusted.
3. display module according to claim 2, which is characterized in that the gamma curve is 2.2 curve of gamma.
4. display module according to claim 1, which is characterized in that the pixel aperture ratio of the fingerprint identification area is less than institute
State the pixel aperture ratio of non-fingerprint identification area.
5. display module according to claim 4, which is characterized in that the backlight illumination in first backlight area is L1, institute
The backlight illumination for stating the second backlight area is L2, wherein L1 < L2；
The penetrance of the light Jing Guo the non-fingerprint identification area that go out in first backlight area is T1, and second backlight area goes out light
Penetrance by the fingerprint identification area is T2, wherein T1 > T2；
And T1 × L1=T2 × L2.
6. display module according to claim 5, which is characterized in that the display panel includes incidence surface and light-emitting surface,
The incidence surface and light-emitting surface intersection；
The backlight module includes the first luminescence component, and first luminescence component is located at the side of the incidence surface；
The backlight module includes light guide plate, and the dot density of light guide plate is lower than second backlight area in first backlight area
The dot density of interior light guide plate.
7. display module according to claim 5, which is characterized in that the backlight module includes the of multiple array arrangements
Two luminescence components and third luminescence component；
Second luminescence component is located in first backlight area, and the third luminescence component is located at second backlight area
It is interior, wherein the arrangement density of second luminescence component is less than the arrangement density of the third luminescence component.
8. display module according to claim 5, which is characterized in that the backlight module includes the of multiple array arrangements
Two luminescence components and third luminescence component；
Second luminescence component is located in first backlight area, and the third luminescence component is located at second backlight area
It is interior, wherein the electric current for being passed through second luminescence component is less than the electric current of the third luminescence component.
9. a kind of driving method of display module, which is characterized in that applied to any display module of claim 1 to 8,
Comprising steps of
Display module is provided, the display module includes the display panel and backlight module being oppositely arranged, the display panel packet
Fingerprint identification area and non-fingerprint identification area are included, the backlight module includes the first backlight area and the second backlight area, perpendicular to institute
First backlight area is oppositely arranged with the non-fingerprint identification area on the direction of plane where stating display panel, second back
Light area is oppositely arranged with the fingerprint identification area；The non-fingerprint identification area the orthographic projection of plane where the display panel with
In the orthographic projection of plane where the display panel, there are overlapping regions in second backlight area；
The display module further includes control module；
When detecting the display brightness unevenness of the overlapping region, the control module passes through the ash for adjusting the overlapping region
Rank voltage adjusts the display brightness of the overlapping region.
10. driving method according to claim 9, which is characterized in that the control module is by adjusting the crossover region
The gray scale voltage in domain adjusts the display brightness of the overlapping region,
Calculate brightness disproportionation factor x, comprising: x=LA/LB, wherein LAFor the brightness of the overlapping region, LBFor except the crossover region
The brightness at part other than domain；
Calculate brightness regulation factor a, comprising: a=1/x；
The brightness regulation factor is input in a gamma curve, vertical seat of the brightness regulation factor as gamma curve
Mark, the abscissa accordingly obtained is gray scale voltage adjusted.
11. a kind of display device, which is characterized in that including any display module of claim 1-8.
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