CN110850626A - Liquid crystal display panel and display device - Google Patents
Liquid crystal display panel and display device Download PDFInfo
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- CN110850626A CN110850626A CN201911194182.XA CN201911194182A CN110850626A CN 110850626 A CN110850626 A CN 110850626A CN 201911194182 A CN201911194182 A CN 201911194182A CN 110850626 A CN110850626 A CN 110850626A
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133621—Illuminating devices providing coloured light
Abstract
The embodiment of the invention discloses a liquid crystal display panel and a display device. The liquid crystal display panel comprises a main display area and a fingerprint identification display area, wherein the main display area and the fingerprint identification display area comprise a plurality of pixel areas which are arranged in an array manner; in the fingerprint identification display area, at least part of pixel areas comprise a first sub-pixel area, a second sub-pixel area and a fingerprint identification area, the array substrate is provided with a first color light source and a second color light source in the first sub-pixel area and the second sub-pixel area, and the fingerprint identification area is provided with a fingerprint identification unit; a black matrix is arranged on the opposite substrate, and a plurality of sub-pixel openings and a plurality of fingerprint identification openings are arranged on the black matrix. According to the embodiment of the invention, not only can fingerprint identification be carried out through the fingerprint identification unit, but also the backlight module can be replaced by the first color light source and the second color light source on the array substrate, so that the thickness of the liquid crystal display panel is reduced, meanwhile, the color resistance on the opposite substrate can be removed, the transmittance of light is increased, and the brightness of the liquid crystal display panel is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a liquid crystal display panel and a display device.
Background
In recent years, with the spread of mobile display products, information security is receiving attention from consumers. The fingerprint has the characteristics of uniqueness and difficulty in copying, so that the fingerprint identification is widely applied to unlocking and payment confirmation of mobile display products.
Currently, products based on optical fingerprint identification technology are mainly applied to Organic Light Emitting Display (OLED). When fingerprint identification is carried out, because the fingerprint has the valley and the ridge, the light emitted by the display panel has reflectivity difference when the valley and the ridge of the fingerprint are reflected, and at the moment, each fingerprint identification unit arranged in the display panel can receive differentiated fingerprint information, so that a fingerprint image is formed for identification.
However, the existing liquid crystal fingerprint identification display panel generally adopts a backlight module and a liquid crystal panel, wherein the backlight module provides backlight, and a fingerprint identification unit is arranged in the liquid crystal panel. By adopting the structure of the backlight module and the liquid crystal panel, the whole thickness of the liquid crystal display panel is thicker, and backlight light needs to be adjusted in light through the color resistor after passing through the liquid crystal layer, so that the backlight light transmittance is reduced, and the brightness of the display panel is lower.
Disclosure of Invention
The invention provides a liquid crystal display panel and a display device, which are used for reducing the thickness of the liquid crystal display panel and improving the brightness of the liquid crystal display panel.
In a first aspect, an embodiment of the present invention provides a liquid crystal display panel, including a main display area and a fingerprint identification display area, where the main display area and the fingerprint identification display area include a plurality of pixel areas arranged in an array;
the liquid crystal display panel further comprises an array substrate, an opposite substrate and a liquid crystal layer positioned between the array substrate and the opposite substrate; in the fingerprint identification display area, at least part of the pixel areas comprise a first sub-pixel area, a second sub-pixel area and a fingerprint identification area, the array substrate is provided with a first color light source and a second color light source in the first sub-pixel area and the second sub-pixel area, and the fingerprint identification area is provided with a fingerprint identification unit;
the opposite substrate is provided with a black matrix, the black matrix is provided with a plurality of sub-pixel openings and a plurality of fingerprint identification openings, the vertical projection of the sub-pixel openings on the array substrate is at least partially overlapped with the vertical projection of the first sub-color light source or the second color light source on the array substrate, and the vertical projection of the fingerprint identification openings on the array substrate is at least partially overlapped with the vertical projection of the fingerprint identification units on the array substrate.
In a second aspect, an embodiment of the present invention further provides a display device, including the liquid crystal display panel according to any one of the first aspect.
According to the liquid crystal display panel and the display device provided by the embodiment of the invention, the main display area and the fingerprint identification display area are arranged, and the main display area and the fingerprint identification display area comprise a plurality of pixel areas which are arranged in an array manner; the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein in the fingerprint identification display area, at least part of pixel areas are provided with a first sub-pixel area, a second sub-pixel area and a fingerprint identification area; meanwhile, a black matrix is arranged on the opposite substrate, a plurality of sub-pixel openings and a plurality of fingerprint identification openings are arranged on the black matrix, the vertical projection of the sub-pixel openings on the array substrate is at least partially overlapped with the vertical projection of the first color light source or the second color light source on the array substrate, the vertical projection of the fingerprint identification openings on the array substrate is at least partially overlapped with the vertical projection of the fingerprint identification unit on the array substrate, so that the liquid crystal display panel can not only carry out fingerprint identification through the fingerprint identification unit in a fingerprint identification display area, but also carry out color matching display through the first color light source and the second color light source on the array substrate, on the basis of realizing the fingerprint identification function of the liquid crystal display panel, a backlight module of the liquid crystal display panel can be replaced, the thickness of the liquid crystal display panel is reduced, and meanwhile, the color resistance on the opposite, the transmittance of light is increased, and the brightness of the liquid crystal display panel is improved. In addition, through set up first colour light source and second colour light source on array substrate, help suitably increasing the display brightness in fingerprint identification display area, avoid the fingerprint identification district because of occupying the problem that the fingerprint identification display area luminance that the open area leads to reduces, guarantee liquid crystal display panel's whole luminance.
Drawings
FIG. 1 is a schematic diagram of a conventional LCD panel;
FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1;
fig. 3 is a schematic structural diagram of an lcd panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view along BB' of FIG. 3;
FIG. 5 is a partially enlarged view of the cross-sectional structure of FIG. 3 taken along line CC';
FIG. 6 is a schematic diagram of another LCD panel according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another LCD panel according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another LCD panel according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a liquid crystal display panel according to another embodiment of the present invention;
FIG. 10 is a schematic view of an array substrate of a liquid crystal display panel according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another LCD panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a conventional liquid crystal display panel, and fig. 2 is a schematic structural diagram of a cross section along AA' of fig. 1. referring to fig. 1 and fig. 2, as described in the background section, a conventional liquid crystal display panel is generally composed of two parts, namely a backlight module 10 and a liquid crystal panel 20. The backlight module 10 provides backlight to the liquid crystal panel 20, the liquid crystal panel 20 includes an array substrate 21, a counter substrate 22 and a liquid crystal layer 23, and a driving circuit (not shown) disposed on the array substrate 21 controls each liquid crystal cell in the liquid crystal layer 23 to gate the backlight, thereby realizing brightness of each sub-pixel. Meanwhile, the black matrix 221 and the color resistor on the counter substrate 23 in the liquid crystal panel 20 can realize light modulation of light emitted from each sub-pixel, and full-color display of the liquid crystal display panel can be realized by color matching of three primary colors. Meanwhile, the fingerprint recognition unit 40 disposed in the array substrate 21 may receive light reflected by a fingerprint of a finger through the opening of the black matrix 211, thereby performing fingerprint recognition. However, since the liquid crystal panel 20 needs to be provided with the backlight module 10 to provide backlight, it is difficult to make the whole liquid crystal display panel thinner to some extent, and the efficiency of providing backlight by using the backlight module 10 is also low. In view of the above, an embodiment of the invention provides a liquid crystal display panel.
Fig. 3 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present invention, fig. 4 is a schematic structural diagram of a cross-section taken along BB' of fig. 3, referring to fig. 3 and fig. 4, the liquid crystal display panel includes a main display area 100 and a fingerprint identification display area 200, the main display area 100 and the fingerprint identification display area 200 include a plurality of pixel areas 300 arranged in an array; the liquid crystal display panel further includes an array substrate 21, an opposite substrate 22, and a liquid crystal layer 23 between the array substrate 21 and the opposite substrate 22; in the fingerprint identification display area 200, at least a part of the pixel area 300 includes a first sub-pixel area 301, a second sub-pixel area 302 and a fingerprint identification area 305, the array substrate 21 is provided with a first color light source 31 and a second color light source 32 in the first sub-pixel area 301 and the second sub-pixel area 302, and the fingerprint identification unit 40 is provided in the fingerprint identification area 305;
the counter substrate 22 is provided with a black matrix 221, the black matrix 221 is provided with a plurality of sub-pixel openings 222 and a plurality of fingerprint identification openings 223, a vertical projection of the sub-pixel openings 222 on the array substrate 21 at least partially overlaps a vertical projection of the first sub-color light sources 31 or the second sub-color light sources 32 on the array substrate 21, and a vertical projection of the fingerprint identification openings 223 on the array substrate 21 at least partially overlaps a vertical projection of the fingerprint identification units 40 on the array substrate 21.
The array substrate 21 further includes a transparent substrate 210 and functional film layers formed by a driving circuit, and the first color light source 31, the second color light source 32, the fingerprint identification unit 40, and other components in the array substrate 21 are driven and controlled by the driving circuit. The black matrix 221 of the counter substrate 22 is also formed on a transparent base substrate 210.
The main display area 100 and the fingerprint identification display area 200 in the liquid crystal display panel are based on whether a fingerprint identification function is set as a discrimination criterion, in other words, a fingerprint identification unit is provided in the fingerprint identification display area 200 for performing fingerprint identification as compared with the main display area 100. Optionally, the fingerprint identification display area 200 is disposed at a lower half portion of the whole liquid crystal display panel, and may of course be disposed at other positions, such as a side edge area, to facilitate fingerprint identification of a specific finger of a user. When a screen is displayed, the main display area 100 and the fingerprint recognition display area 200 are simultaneously displayed and constitute the entire screen. The fingerprint identification display area 200 is provided with the fingerprint identification units 40 in some of the pixel areas 300, and correspondingly provided with the fingerprint identification openings 223 in the black matrix 221 of the opposite substrate 22, so as to guide the light reflected by the fingerprint into the fingerprint identification units 40 through the fingerprint identification openings 223 for fingerprint identification, that is, the fingerprint identification areas 305 are correspondingly provided in the pixel areas 300. Of course, the liquid crystal display panel is further provided with a first sub-pixel area 221 and a second sub-pixel area 222, so that the pixel area 300 has a dimming capability, and a picture is formed macroscopically by matching with other pixel areas 300. It should be noted that the fingerprint identification area 305 is provided in at least a part of the pixel areas 300 in the fingerprint identification display area 200, which means that not all the pixel areas 300 in the fingerprint identification display area 200 may be provided with the fingerprint identification units 40, and the number and distribution thereof may meet the requirement of the fingerprint identification function. Also, the higher the proportion of the pixel area 300 in the fingerprint identification display area 200 in which the fingerprint identification unit 40 is provided, the higher the fingerprint identification accuracy. Therefore, the skilled person can also set the fingerprint identification unit 40 in all the pixel areas 300 of the fingerprint identification display area 200, thereby achieving the maximum fingerprint identification accuracy and achieving the purpose of increasing the fingerprint identification area.
In addition, the sub-pixel openings 222 and the fingerprint recognition openings 223 provided in the black matrix 221 of the counter substrate 22 in the liquid crystal display panel determine the positions, shapes, and areas of the first sub-pixel region 301, the second sub-pixel region 302, and the fingerprint recognition region 305 in correspondence. Moreover, in order to ensure effective light output of the sub-pixel region and effective light input of the fingerprint identification region 305, it is necessary to set the vertical projection of the first color light source 31 and the second color light source 32 on the array substrate 21 to at least partially overlap with the vertical projection of the sub-pixel opening 222 on the array substrate 21, so as to ensure that the light output of the first color light source 31 and the second color light source 32 can be output from the sub-pixel opening 222; the perpendicular projection of the fingerprint identification unit 40 on the array substrate 21 is at least partially overlapped with the perpendicular projection of the fingerprint identification opening 223 on the array substrate 21, so as to ensure that the light reflected by the finger can be incident to the fingerprint identification unit 40 through the fingerprint identification opening 223. In addition, it should be noted that the first color light sources 31 and the second color light sources 32 are disposed on the array substrate 21, instead of providing light sources by the backlight module. Meanwhile, the first color light source 31 and the second color light source 32 can directly emit light of a specific color from the sub-pixel opening without setting a color resistance on the opposite substrate 22, thereby reducing the manufacturing process and the process cost of the opposite substrate 22. In addition, since the light emitted from the first color light source 31 and the second color light source 32 does not need to pass through the color resistance, the light transmittance is higher, and the display brightness of the liquid crystal display panel is also increased.
According to the liquid crystal display panel provided by the embodiment of the invention, the main display area and the fingerprint identification display area are arranged, and the main display area and the fingerprint identification display area comprise a plurality of pixel areas which are arranged in an array manner; the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein in the fingerprint identification display area, at least part of pixel areas are provided with a first sub-pixel area, a second sub-pixel area and a fingerprint identification area; meanwhile, a black matrix is arranged on the opposite substrate, a plurality of sub-pixel openings and a plurality of fingerprint identification openings are arranged on the black matrix, the vertical projection of the sub-pixel openings on the array substrate is at least partially overlapped with the vertical projection of the first color light source or the second color light source on the array substrate, the vertical projection of the fingerprint identification openings on the array substrate is at least partially overlapped with the vertical projection of the fingerprint identification unit on the array substrate, so that the liquid crystal display panel can not only carry out fingerprint identification through the fingerprint identification unit in a fingerprint identification display area, but also carry out color matching display through the first color light source and the second color light source on the array substrate, on the basis of realizing the fingerprint identification function of the liquid crystal display panel, a backlight module of the liquid crystal display panel can be replaced, the thickness of the liquid crystal display panel is reduced, and meanwhile, the color resistance on the opposite, the transmittance of light is increased, and the brightness of the liquid crystal display panel is improved. In addition, through set up first colour light source and second colour light source on array substrate, help suitably increasing the display brightness in fingerprint identification display area, avoid the fingerprint identification district because of occupying the problem that the fingerprint identification display area luminance that the open area leads to reduces, guarantee liquid crystal display panel's whole luminance.
With continuing reference to fig. 3 and 4, it should be noted that the pixel regions 300 arranged in an array in the main display region 100 of the liquid crystal display panel are also provided with a first sub-pixel region 301 and a second sub-pixel region 302, and further provided with a third sub-pixel region 303. The pixel area 300 without the fingerprint area 305 in the fingerprint display area 200 is also provided with a third sub-pixel area 303, and the first sub-pixel area 301, the second sub-pixel area 302 and the third sub-pixel area 303 are respectively provided with a first color light source 31, a second color light source 32 and a third color light source on the array substrate 21. At this time, the first color light source 31, the second color light source 32, and the third color light source in each pixel area 300 may be color-matched to realize full-color display, so that the accuracy of image display may be ensured. Wherein the first color, the second color, and the third color may be red, green, and blue. The first color light source 31, the second color light source 32, and the third color light source may employ micro-light emitting diodes (micro-led).
Fig. 5 is a partially enlarged schematic view of a cross-sectional structure taken along CC' in fig. 3, and referring to fig. 5, specifically, a first polarizer 241 is further disposed between the array substrate 21 and the liquid crystal layer 23, a second polarizer 242 is disposed on the light emitting side of the opposite substrate 22, and a transmission axis of the first polarizer 241 is perpendicular to a transmission axis of the second polarizer 242.
As shown, the transmission axis of the first polarizer 241 is perpendicular to the paper, and the second polarizer 242 is parallel to the paper. The light-gating effects of the array substrate 21 and the liquid crystal layer 23 require the cooperation of the transmission axes of the first and second polarizing plates 241 and 242. The display principle of the liquid crystal display panel will be briefly described with reference to the structure shown in fig. 5: the array substrate 21 drives the light sources arranged in the pixel regions 300 of the main display region 100 and the fingerprint identification display region 200 to emit light, light emitted by the light sources forms linearly polarized light with the polarization state consistent with the transmission axis of the first polarizer 241 through the first polarizer 241, and then the array substrate 21 drives the liquid crystal molecules of the corresponding liquid crystal layer 23 to deflect, so that the polarization state of the linearly polarized light rotates by 90 degrees, at the moment, the polarization state of the light is consistent with the transmission axis of the second polarizer 242, the light is emitted, and the light which is not driven by the array substrate 21 to realize the deflection of the liquid crystal molecules is absorbed by the second polarizer 242.
In order to avoid the fingerprint identification region being disposed between the sub-pixels of the adjacent rows, which results in the fingerprint identification region occupying the opening area of the pixel region in the pixel region of the fingerprint identification display region, and therefore, with continued reference to fig. 3 and 4, preferably, in the fingerprint identification display region 200, the first sub-pixel region 301, the second sub-pixel region 302 and the fingerprint identification region 303 are alternately arranged in sequence along the first direction 1, and the first color and the second color may be color-mixed.
It can be seen that the above embodiment provides the liquid crystal display panel, in which the fingerprint identification region 303 occupies the position of the third sub-pixel region 303 in the pixel region 300. In the pixel area 300 where the fingerprint identification area 305 is provided in the fingerprint identification display area 200, color-matching display is performed by the first color light source 31 and the second color light source 32. At this moment, by reasonably setting the number of the pixel areas 300 with the fingerprint identification areas 303, the influence of color difference caused by color matching of the two colors in the pixel areas 300 can be avoided to a certain extent while the fingerprint identification effect is ensured, and the display effect is ensured. Moreover, because the fingerprint identification area 303 is not arranged between the adjacent rows of pixel areas 300, the distance between the adjacent rows of pixel areas 300 is shortened, the arrangement of the pixel areas 300 is more dense, the aperture opening ratio of the pixel areas 300 is effectively increased, the influence of the fingerprint identification area 303 on the aperture opening ratio is solved, and the display brightness of the whole liquid crystal display panel is further improved.
Optionally, the embodiment of the invention further provides a liquid crystal display panel. Fig. 6 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 6, in the liquid crystal display panel provided in the above embodiment, in the fingerprint identification display area 200, each of the pixel areas 300 includes a third sub-pixel area 303, a third color light source 33 is disposed in the third sub-pixel area 303, the first sub-pixel area 301, the second sub-pixel area 302, and the third sub-pixel area 303 are alternately arranged in sequence along the first direction 1, the fingerprint identification area 305 and the third sub-pixel area 303 are arranged in a direction perpendicular to the first direction 1, and the first color, the second color, and the third color may be color mixed.
In other words, in the fingerprint identification display area 200 of the liquid crystal display panel shown in fig. 6, the fingerprint identification area 305 and the third sub-pixel area 303 occupy the position of the third sub-pixel 303 in the pixel area 300 in the main display area 100, and at this time, the pixel area 300 in the fingerprint identification display area 200 includes the first sub-pixel area 301, the second sub-pixel area 302 and the third sub-pixel area 303, that is, includes the first color light source 31, the second color light source 32 and the third color light source 33, so that each pixel area 300 can implement full color matching, display color difference of the fingerprint identification display area 200 is reduced to a certain extent, and meanwhile, it is ensured that each pixel area 300 is more compact, and aperture ratio and display brightness can be ensured. It should be noted here that, since the fingerprint identification area 305 and the third sub-pixel area 303 in the fingerprint identification display area 200 occupy the position of the third sub-pixel 303 in the pixel area 300 in the main display area 100, specifically, the area ratio and the relative position of the fingerprint identification area 305 and the third sub-pixel 303 are not limited herein, and for example, the area ratio relationship may be equal ratio, and those skilled in the art can perform experiments and settings according to actual effects.
In the liquid crystal display panel shown in fig. 6, in the pixel area 300 of the fingerprint identification display area 200, the fingerprint identification area 305 still occupies a part of the area of the third sub-pixel area 303, so that there is a certain difference in brightness between the fingerprint identification display area 200 and the main display area 100, and in order to improve the difference in brightness, when designing the light source driving circuit of the array substrate, each color light source may be set to be capable of controlling light emission independently, so that when driving the light sources of the main display area 100 and the fingerprint identification display area 200, the brightness of the third color light source 33 of the fingerprint identification display area 200 is greater than the brightness of the third color light source 33 of the main display area 100, and it is ensured that the display brightness of the pixels after color matching of the first color light source 31, the second color light source 32 and the third color light source 33 is consistent.
Fig. 7 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 7, further, in order to increase the fingerprint recognition accuracy and improve the fingerprint recognition effect. On the basis of the above embodiment, the fingerprint identification area 305 may be further included between two rows of pixel areas 300 that are at least partially adjacent to each other in the fingerprint identification display area 200 in the vertical first direction 1. At this time, the pixel area 300 of the fingerprint identification display area 200, in which the fingerprint identification area 305 is disposed, includes two fingerprint identification areas 305, that is, two fingerprint identification units 40 are disposed in the array substrate 21 corresponding to the same pixel area 300. Obviously, the more the fingerprint identification units 40 are arranged, the greater the density is, the more accurate the light collection of the fingerprint details is, so that the fingerprint can be identified more accurately, and the fingerprint identification effect is improved.
Of course, in order to completely eliminate the color matching problem of the fingerprint identification display area caused by the fingerprint identification area replacing the third sub-pixel area, each pixel area may be arranged to include the third sub-pixel area. Fig. 8 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 8, the pixel area 300 further includes a third sub-pixel area 303, a third color light source 33 is disposed in the third sub-pixel area 303, the first sub-pixel area 301, the second sub-pixel area 302, and the third sub-pixel area 303 are alternately arranged along the first direction 1, and the first color, the second color, and the third color can be mixed; the fingerprint recognition unit 40 is located between two adjacent rows of the pixel regions 300.
In addition, the embodiment of the invention also provides the liquid crystal display panel, aiming at the problem that the brightness of the liquid crystal display panel is reduced due to the fact that the fingerprint identification area occupies the aperture opening ratio. Fig. 9 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 9, in the liquid crystal display panel shown in the figure, in the main display area 100 and the fingerprint identification display area 200, each of the pixel areas 300 includes a first sub-pixel area 301, a second sub-pixel area 302, and a third sub-pixel area 303, the array substrate 21 is provided with a first color light source 31, a second color light source 32, and a third color light source 33 in the first sub-pixel area 301, the second sub-pixel area 302, and the third sub-pixel area 303, and the first color, the second color, and the third color can be mixed and matched; in the main display area 100, the pixel area 300 further includes a fourth sub-pixel area 30, a white light source 34 is disposed in the fourth sub-pixel area 304, and the relative position of the fourth sub-pixel area 304 in the belonging pixel area 300 is consistent with the relative position of the fingerprint identification area 305 in the belonging pixel area 300.
In this case, in the liquid crystal display panel, each pixel area 300 is provided with the first sub-pixel area 301, the second sub-pixel area 302, and the third sub-pixel area 303, so that full color matching can be realized. Meanwhile, the fourth sub-pixel area 30 is disposed in the pixel area 300 of the main display area 100 and corresponds to the white light source 34, that is, the brightness of the main display area 100 can be increased by the white light source 34. In the pixel area 300 of the fingerprint identification display area 200, the fingerprint identification area 305 occupies the fourth sub-pixel area 30, and thus does not affect the color matching problem of the fingerprint identification display area 200.
Further, in order to reduce the brightness difference between the main display area and the fingerprint recognition display area due to the fourth sub-pixel area 30 provided in the main display area, the first color light source 31, the second color light source 32, the third color light source 33, and the white light source 34 may be individually controlled to emit light; the brightness of the first color light source 31, the second color light source 32, and the third color light source 33 of the fingerprint recognition display area 200 is greater than the brightness of the first color light source 31, the second color light source 32, and the third color light source 33 of the main display area 100, respectively. At this time, the display luminance difference between each pixel area 300 of the fingerprint identification display area 200 and each pixel area 300 of the main display area 100 can be shortened, and the overall luminance difference between the main display area and the fingerprint identification display area can be avoided. Moreover, by reasonably setting the brightness of the first color light source 31, the second color light source 32 and the third color light source 33 of the fingerprint identification display area 200 and the brightness of the first color light source 31, the second color light source 32 and the third color light source 33 of the main display area 100, the display brightness of each pixel area 300 of the fingerprint identification display area 200 can be ensured to be consistent with that of each pixel area 300 of the main display area 100, so that the brightness difference is avoided.
In the above liquid crystal display panel, the first color light source 31, the second color light source 32, the third color light source 33, and the white light source 34 may be made of light emitting diodes, for example, micro-led. Fig. 10 is a schematic structural diagram of an array substrate of a liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 10, specifically, a light emitting diode 50 includes a first electrode 51 and a second electrode 52, where the first electrode 51 and the second electrode 52 are both located on a side of the light emitting diode 50 away from a light emitting surface; the array substrate 21 is provided with a light source driving circuit 211 corresponding to each sub-pixel region, and the first electrode 51 and the second electrode 52 are electrically connected to the light source driving circuit 211 respectively.
At this time, the array substrate 21 drives the light emitting diodes 50 through the light source driving circuit 211 arranged thereon, that is, drives the first color light source, the second color light source, the third color light source and the white light source in the pixel area 300 to emit light, so as to realize backlight of each pixel of the liquid crystal display panel, and then, through driving of the liquid crystal layer, dimming and color matching can be realized, thereby performing image display. It should be noted that the light source driving circuit 211 is used to drive each light source to emit light, the array substrate 21 is further provided with a pixel driving circuit to correspondingly drive the liquid crystal layer 23 to deflect liquid crystal molecules, and the arrangement position of the pixel driving circuit is not limited here, and it may be arranged on the side of the light source driving circuit and each light source close to the liquid crystal layer, or may be arranged on the side away from the liquid crystal layer.
In summary, the liquid crystal display panel has a fingerprint identification function because the fingerprint identification display area is provided. When setting the shape and position of the fingerprint recognition display area, ergonomics and finger positions need to be considered. For example, the shape of the fingerprint recognition display area in the liquid crystal display panel may be rectangular, circular, oval, and racetrack to conform to finger shapes and finger touch habits. In addition, when the position of the fingerprint recognition display area is set, problems such as wiring need to be taken into consideration. Fig. 11 is a schematic structural diagram of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 11, the liquid crystal display panel further includes a driving chip 60, and the fingerprint identification display area 200 is located between the main display area 100 and the driving chip 60. At this time, the distance from the fingerprint identification display area 200 to the driving chip 60 is small, and the wiring length of the fingerprint identification signal line can be reduced. In addition, the driving chip 60 is usually disposed at the lower portion of the liquid crystal display panel, and the fingerprint identification display area 200 is correspondingly disposed at the lower half area of the liquid crystal display panel, which is more suitable for the habit of using thumb to perform fingerprint identification.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 12, the display device includes any one of the liquid crystal display panels 2 provided in the embodiments of the present invention. The liquid crystal display device can be a mobile phone, a computer, an intelligent wearable device and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. The liquid crystal display panel is characterized by comprising a main display area and a fingerprint identification display area, wherein the main display area and the fingerprint identification display area comprise a plurality of pixel areas which are arranged in an array;
the liquid crystal display panel further comprises an array substrate, an opposite substrate and a liquid crystal layer positioned between the array substrate and the opposite substrate; in the fingerprint identification display area, at least part of the pixel areas comprise a first sub-pixel area, a second sub-pixel area and a fingerprint identification area, the array substrate is provided with a first color light source and a second color light source in the first sub-pixel area and the second sub-pixel area, and the fingerprint identification area is provided with a fingerprint identification unit;
the opposite substrate is provided with a black matrix, the black matrix is provided with a plurality of sub-pixel openings and a plurality of fingerprint identification openings, the vertical projection of the sub-pixel openings on the array substrate is at least partially overlapped with the vertical projection of the first sub-color light source or the second color light source on the array substrate, and the vertical projection of the fingerprint identification openings on the array substrate is at least partially overlapped with the vertical projection of the fingerprint identification units on the array substrate.
2. The LCD panel of claim 1, wherein the first sub-pixel region, the second sub-pixel region and the fingerprint region are alternately arranged along a first direction in the fingerprint region, and the first color and the second color are mixed.
3. The liquid crystal display panel according to claim 2, wherein a fingerprint identification area is further provided between two rows of the pixel areas that are at least partially adjacent in the first direction.
4. The liquid crystal display panel according to claim 2, wherein the pixel region further includes a third sub-pixel region, a third color light source is disposed in the third sub-pixel region, the first sub-pixel region, the second sub-pixel region and the third sub-pixel region are alternately arranged along a first direction, the fingerprint region and the third sub-pixel region are arranged perpendicular to the first direction, and the first color, the second color and the third color are mixed.
5. The liquid crystal display panel according to claim 1, wherein the pixel region further comprises a third sub-pixel region, a third color light source is disposed in the third sub-pixel region, the first sub-pixel region, the second sub-pixel region and the third sub-pixel region are alternately arranged in sequence along a first direction, and the first color, the second color and the third color can be mixed and matched; the fingerprint identification unit is positioned between two adjacent rows of the pixel areas.
6. The liquid crystal display panel according to claim 1, wherein the pixel regions in the main display region and the fingerprint identification display region each include the first sub-pixel region, the second sub-pixel region, and a third sub-pixel region, and the array substrate is provided with a first color light source, a second color light source, and a third color light source in the first sub-pixel region, the second sub-pixel region, and the third sub-pixel region, respectively, and the first color, the second color, and the third color are mixed;
in the main display area, the pixel area further comprises a fourth sub-pixel area, a white light source is arranged in the fourth sub-pixel area, and the relative position of the fourth sub-pixel area in the pixel area is consistent with the relative position of the fingerprint identification area in the pixel area.
7. The liquid crystal display panel according to claim 6, wherein the first color light source, the second color light source, the third color light source, and the white light source are each individually controllable to emit light;
the brightness of the first color light source, the second color light source and the third color light source of the fingerprint identification display area is respectively greater than the brightness of the first color light source, the second color light source and the third color light source of the main display area.
8. The liquid crystal display panel according to claim 7, wherein the first color light source, the second color light source, the third color light source and the white light source are light emitting diodes, and the light emitting diodes comprise a first electrode and a second electrode, and the first electrode and the second electrode are both located on a side of the light emitting diodes facing away from the light emitting surface;
the array substrate is provided with a light source driving circuit corresponding to each sub-pixel area, and the first electrode and the second electrode are respectively electrically connected with the light source driving circuit.
9. The liquid crystal display panel according to claim 1, wherein a first polarizer is further disposed between the array substrate and the liquid crystal layer, a second polarizer is disposed on a light emitting side of the opposite substrate, and a transmission axis of the first polarizer is perpendicular to a transmission axis of the second polarizer.
10. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel further comprises a driving chip, and the fingerprint identification display area is located between the main display area and the driving chip.
11. A display device comprising the liquid crystal display panel according to any one of claims 1 to 10.
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