CN109445182B - Display module and display device - Google Patents
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- CN109445182B CN109445182B CN201811550097.8A CN201811550097A CN109445182B CN 109445182 B CN109445182 B CN 109445182B CN 201811550097 A CN201811550097 A CN 201811550097A CN 109445182 B CN109445182 B CN 109445182B
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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
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- 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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Abstract
The invention discloses a display module and a display device, and relates to the technical field of display, wherein the display module is provided with a display area and a non-display area surrounding the display area, and the display area comprises an opening area and a non-opening area; the display module comprises a display panel, a field sequential backlight module and a fingerprint identification module, wherein the display panel is positioned in the light emergent direction of the field sequential backlight module, and the fingerprint identification module is integrated in the display panel; the display panel comprises at least one pixel unit positioned in an opening area, the fingerprint identification module comprises at least one fingerprint identification sensor positioned in the opening area, and the field sequential backlight module comprises a red light source, a green light source and a blue light source; in the display stage, a red light source, a green light source and a blue light source respectively emit light; at least two of the red light source, the green light source, and the blue light source are simultaneously illuminated during the fingerprint identification phase. So be favorable to promoting display module assembly and display device's fingerprint identification sensitivity, be favorable to promoting user's experience effect.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display module and a display device.
Background
Human fingerprints have uniqueness and no deformation, so that the safety of fingerprint identification is stronger, and meanwhile, the fingerprint identification method is widely applied to various fields, such as the technical field of display, due to the simple operation. In the field of display technologies, a mobile phone is taken as an example, and unlocking or opening of a specific application program can be completed through fingerprint identification.
With the development of science and technology, a variety of display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like. Like this, the user just needs to touch display device's fingerprint identification module with the finger before the display device that the operation has the fingerprint identification function, just can carry out the authority and verify, has simplified the authority verification process.
Present display device that has fingerprint identification function, a form embodies for fingerprint identification under the screen, and the fingerprint identification module is located the one side that display module kept away from the plain noodles promptly, at fingerprint identification's in-process, and the light via touch subject reflection will pass through a great deal of rete and can get into the fingerprint identification module, consequently, how to ensure that the fingerprint identification module can discern sufficient light and become the present technological problem of waiting to solve urgently in stage with realizing the fingerprint identification function.
Disclosure of Invention
In view of this, the present invention provides a display module and a display device, in the fingerprint identification stage, at least two of the red light source, the green light source and the blue light source in the backlight module emit light simultaneously, and can provide sufficient light for the fingerprint identification sensor, thereby facilitating to improve the sensitivity of fingerprint identification and the experience effect of the user.
In a first aspect, the application provides a display module, which is provided with a display area and a non-display area surrounding the display area, wherein the display area comprises an opening area and a non-opening area;
the display module comprises a display panel, a field sequential backlight module and a fingerprint identification module, wherein the display panel is positioned in the light emergent direction of the field sequential backlight module, and the fingerprint identification module is integrated in the display panel;
the display panel comprises at least one pixel unit positioned in the opening area, the fingerprint identification module comprises at least one fingerprint identification sensor positioned in the opening area, and the field sequential backlight module comprises a red light source, a green light source and a blue light source;
in a display stage, the red light source, the green light source and the blue light source respectively emit light; at least two of the red light source, the green light source, and the blue light source are simultaneously illuminated during the fingerprint identification phase.
In a second aspect, the present application further provides a display device, which includes a display module, where the display module is provided in the embodiments of the present application.
Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:
the application provides a display module and a display device, which comprise a display panel, a field sequential backlight module and a fingerprint identification module integrated on the display panel and positioned in a display area, wherein a pixel unit and a fingerprint identification sensor are arranged in an opening area; at the fingerprint identification stage, red light source among the field sequential backlight unit, at least both in green light source and the blue light source are luminous simultaneously, be favorable to increasing light intensity in the twinkling of an eye, just so can have more light irradiation to touch the main part, light via touching the main part reflection to fingerprint identification sensor will increase, thereby more be favorable to fingerprint identification sensor to gathering the light signal of incidenting above that, thereby be favorable to promoting the sensitivity of display module assembly and display device fingerprint identification process, be favorable to promoting user's use and experience the effect.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a top view of a display module according to an embodiment of the present disclosure;
FIG. 2 is an AA' cross-sectional view of the display module of FIG. 1;
FIG. 3 is a BB' cross-sectional view of the display panel of the display module of FIG. 1;
fig. 4 is a timing diagram illustrating a light emission of a field sequential backlight module in a display module according to an embodiment of the present disclosure;
fig. 5 is a schematic layout view of fingerprint recognition sensors in the display module according to the embodiment of the present disclosure;
fig. 6 is a schematic diagram illustrating a fingerprint sensor in a display module according to an embodiment of the present disclosure;
fig. 7 is a schematic circuit diagram of a display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic circuit diagram illustrating a connection between a pixel unit and a fingerprint sensor in a display module according to an embodiment of the present disclosure;
fig. 9 is a diagram illustrating a relative position relationship between a pixel unit and a fingerprint identification module in a display module according to an embodiment of the present disclosure;
FIG. 10 is a cross-sectional view of a display panel of the display module shown in FIG. 1 according to an embodiment of the present invention;
FIG. 11 is a cross-sectional view of another AA' of the display module of FIG. 1;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Present display device that has fingerprint identification function, a form embodies for fingerprint identification under the screen, and the fingerprint identification module is located the one side that display module kept away from the plain noodles promptly, at fingerprint identification's in-process, and the light via touch subject reflection will pass through a great deal of rete and can get into the fingerprint identification module, consequently, how to ensure that the fingerprint identification module can discern sufficient light and become the present technological problem of waiting to solve urgently in stage with realizing the fingerprint identification function.
In view of this, the present invention provides a display module and a display device, in the fingerprint identification stage, at least two of the red light source, the green light source and the blue light source in the backlight module emit light simultaneously, and can provide sufficient light for the fingerprint identification sensor, thereby facilitating to improve the sensitivity of fingerprint identification and the experience effect of the user.
The principle of optical fingerprint recognition will be briefly explained first. Light rays emitted by a light source in the display panel irradiate the touch main body, the light rays are reflected by the touch main body to form emitting light, the formed reflecting light is transmitted to the fingerprint identification sensor, and the fingerprint identification sensor collects light signals incident on the fingerprint identification sensor. Because the fingerprint has specific lines, the intensity of reflected light formed at each position of the ridge and the valley of the finger is different, so that the light signals collected by each fingerprint identification sensor are different, the fingerprint identification function is realized, and the real identity of the user can be determined.
The following detailed description is to be read in connection with the drawings and the detailed description.
Fig. 1 is a top view of a display module according to an embodiment of the present disclosure, fig. 2 is an AA 'cross-sectional view of the display module according to the embodiment of fig. 1, fig. 3 is a BB' cross-sectional view of a display panel in the display module according to the embodiment of fig. 1, please refer to fig. 1 to 3, a display module 100 according to an embodiment of the present disclosure is provided with a display area 11 and a non-display area 12 surrounding the display area 11, the display area 11 includes an opening area 111 and a non-opening area 112;
the display module 100 includes a display panel 10, a field sequential backlight module 20 and a fingerprint identification module 30, the display panel 10 is located in the light emitting direction of the field sequential backlight module 20, and the fingerprint identification module 30 is integrated in the display panel 10;
the display panel 10 includes at least one pixel unit 60 located in the opening area 111, the fingerprint identification module 30 includes at least one fingerprint identification sensor 31 located in the opening area 111, and the field sequential backlight module 20 includes a red light source 21, a green light source 22, and a blue light source 23;
in the display phase, the red light source 21, the green light source 22 and the blue light source 23 respectively emit light; at least two of the red light source 21, the green light source 22 and the blue light source 23 are simultaneously illuminated during the fingerprint identification phase.
Specifically, please refer to fig. 1 to fig. 3, the display module 100 provided in the embodiment of the present application includes a display panel 10, a field sequential backlight module 20, and a fingerprint identification module 30 integrated with the display panel 10, and the fingerprint identification module 30 is introduced to enable the display panel 10 to have a fingerprint identification function; the field sequential backlight module 20 is introduced, and the field sequential backlight module 20 includes a red light source 21, a green light source 22 and a blue light source 23, and compared with the backlight module in the prior art which can only emit white light, the field sequential backlight module 20 can emit light of three different colors, namely red, green and blue, based on which, no color resistance is provided in the display panel 10, thereby being beneficial to improving the light transmittance of the display module 100. In the display stage, the red light source 21, the green light source 22 and the blue light source 23 in the field sequential backlight module 20 emit light respectively to provide light sources for normal display of the pixel unit 60; at the fingerprint identification stage, red light source 21 in field sequential backlight unit 20, at least two in green light source 22 and the blue light source 23 are luminous simultaneously, compare only a few LED lamps among the prior art for fingerprint identification sensor 31 provides the mode of light source, all red light sources 21 in the embodiment of the application, at least two in all green light sources 22 and all blue light sources 23 are luminous simultaneously, can increase the light intensity in the twinkling of an eye, just so can have more light irradiation to touch the main part, the light that reflects to fingerprint identification sensor 31 via touch the main part will increase, thereby more be favorable to fingerprint identification sensor 31 to gathering the light signal of incidenting on it, thereby be favorable to promoting the sensitivity of display module 100 fingerprint identification process, be favorable to promoting user's use experience effect. Fig. 4 is a timing chart of light emission of the field sequential backlight module in the display module according to the embodiment of the present disclosure, where the timing chart shows that the red light source 21, the green light source 22 and the blue light source 22 emit light simultaneously in the fingerprint identification stage.
It should be noted that, in the fingerprint identification stage, at least two of the red light source 21, the green light source 22 and the blue light source 23 are simultaneously illuminated in the embodiments of the present application, and two refer to all the LEDs included in the light sources of two colors, rather than two LEDs. Optionally, at the fingerprint identification stage, red light source 21, green light source 22 and blue light source 23 are all luminous simultaneously, so can provide more light for the fingerprint identification process to be favorable to promoting display module assembly 100's fingerprint identification sensitivity more.
It should be noted that the embodiment shown in fig. 1 only schematically shows a relative position relationship between the pixel unit 60 and the fingerprint sensor 31, and does not represent actual size or number; fig. 1 also shows only one arrangement of the pixel units 60, which is only a schematic illustration, and the pixel units 60 may also be embodied in other arrangements in some other embodiments of the present application, which is not specifically limited in this application. In addition, the position of the fingerprint sensor 31 on the display panel 10 may be located between two adjacent rows of the pixel units 60, or located between two adjacent columns of the pixel units 60, the number, size and arrangement of the fingerprint sensor 31 may be flexibly set according to actual conditions, one or more fingerprint identification areas may be designed on the display panel 10, and the fingerprint identification area mentioned herein may include a plurality of fingerprint identification sensors 31.
Optionally, referring to fig. 3, the display panel 10 includes an array substrate 101 and a color filter substrate 102 that are oppositely disposed, and the fingerprint identification module 30 is integrated with the array substrate 101;
the color filter substrate 102 comprises a light shield 70 positioned in the non-opening area 112, and an orthogonal projection of the light shield 70 on the plane of the array substrate 101 is not overlapped with an orthogonal projection of the fingerprint identification sensor 31 on the plane of the array substrate 101.
Specifically, referring to fig. 3, in the display module 100 provided in the embodiment of the present disclosure, the display panel 10 is a liquid crystal display panel 10, the display panel 10 includes an array substrate 101, a color filter substrate 102 and liquid crystal filled between the array substrate 101 and the color filter substrate 102, the color filter substrate 102 is provided with a light-shielding material 70, an area of the display region 11 shielded by the light-shielding material 70 is a non-opening region 112, and an area not shielded by the light-shielding material 70 is an opening region 111. The opening region 111 refers to an effective region through which light can pass on the display panel 10, and in some implementations of the prior art, for example, regions where signal lines on the display panel 10 are located, the thin film transistor itself, and a storage capacitor for storing voltage are located are not completely transparent, and light passing through these regions is not controlled by voltage and thus cannot display correct gray scale, and these regions are blocked by a black matrix to form a non-opening region 112, which is opaque. The non-opening area 112 is usually provided with circuit devices such as signal traces and thin film transistors, and the fingerprint sensor 31 in this application is located in the opening area 111, that is, the orthographic projection of the light shield 70 on the plane where the array substrate 101 is located and the orthographic projection of the fingerprint sensor 31 on the plane where the array substrate 101 is located are not overlapped, so that the light reflected by the touch body can smoothly reach the fingerprint sensor 31 to realize the fingerprint identification function.
It should be noted that, in the embodiment of the present application, the touch subject is usually a finger, the fingerprint of the finger is composed of a series of ridges and valleys on the skin surface of the finger tip, because the ridges of the fingerprint are close to the glass and have similar refractive index to the glass, the light is not easily reflected at the interface between the ridges of the fingerprint and the glass, and the valleys of the fingerprint are not in contact with the glass, the medium is air, and the refractive index is low. Light is easily reflected by reaching the interface between the glass and the air. Therefore, the ridges and valleys of the fingerprint have different reflectivities to light, so that the intensity of light sensed by the fingerprint recognition sensor 31 is different, resulting in an image of the fingerprint. The sizes of current signals converted from the reflected light formed at the positions of the ridges and the positions of the valleys are different, and fingerprint identification can be performed according to the sizes of the current signals. The touch subject may be a palm or the like, or may also use a palm print to implement the detection and recognition functions, which is not specifically limited in this application.
Optionally, fig. 5 is a schematic diagram illustrating an arrangement of the fingerprint identification sensors 31 in the display module 100 according to the embodiment of the present application, please refer to fig. 5, in which the fingerprint identification sensors 31 are arranged in an array, the fingerprint identification module 30 further includes at least one first storage capacitor 72, at least one first thin film transistor 71, a first gate line 61 extending along a first direction and arranged along a second direction, and a first data line 72 extending along the second direction and arranged along the first direction, and the first direction and the second direction are crossed;
the gates of the first thin film transistors 71 arranged along the first direction are connected to the same first gate line 61, the first poles of the first thin film transistors 71 arranged along the second direction are connected to the same first data signal line, and the second poles of the first thin film transistors 71 are electrically connected to the fingerprint sensor 31 and the first storage capacitor 72, respectively.
Specifically, fig. 5 shows a schematic diagram of a fingerprint identification area formed by a plurality of fingerprint identification modules 30 in the display module 100, in the fingerprint identification stage, the first gate line 61 is used for sending a gating signal to the first thin film transistor 71 row by row, turning on the corresponding first thin film transistor 71, scanning the corresponding fingerprint identification sensor 31 row by row, and providing a back bias voltage to the fingerprint identification sensor 31; when certain or certain several fingerprint identification sensor 31 received the light via touch subject reflection, can be at the effect of reverse bias voltage down with light signal conversion for the signal of telecommunication, can see from fig. 5, fingerprint identification module 30 still includes first storage capacitor 72, this first storage capacitor 72 is parallelly connected with fingerprint identification sensor 31, the capacitance value is the same with fingerprint identification sensor 31's capacitance value, the capacitance value through the first data line 72 detectable electric capacity of data, thereby detect the distribution condition of fingerprint valley and ridge, fingerprint valley light leakage flow is great, the capacitance value is less, fingerprint ridge light leakage flow is less, the capacitance value is great, and then realize the fingerprint identification function.
Alternatively, fig. 6 is a schematic view of a fingerprint sensor 31 in the display module 100 according to an embodiment of the present disclosure, where the fingerprint sensor 31 includes a P-type semiconductor layer 311, an intrinsic semiconductor layer 312, and an N-type semiconductor layer 313, which are sequentially disposed.
Specifically, referring to fig. 6, the fingerprint sensor 31 provided in the embodiment of the present application may be embodied as a PIN photodiode, and the PIN photodiode is formed by adding a low-doped or undoped Intrinsic (Intrinsic) semiconductor layer between a P-type semiconductor layer 311 and an N-type semiconductor layer 313, wherein the P-type semiconductor layer 311 is doped with P-type impurities, the N-type semiconductor layer 313 is doped with N-type impurities, and both the P-type semiconductor layer 311 and the N-type semiconductor layer 313 can be doped by ion implantation. The intrinsic semiconductor layer 312 approximates a medium, which is sensitive to light, for receiving light reflected by the touch subject; when the intrinsic semiconductor layer 312 is introduced between the P-type semiconductor layer 311 and the N-type semiconductor layer 313, the distance between the two electrodes of the P-N junction capacitance is increased, so that the junction capacitance becomes small. The widths of the depletion layers in the P-type semiconductor layer 311 and the N-type semiconductor layer 313 are widened as the reverse bias increases, and the junction capacitance becomes small as the reverse bias increases. When a reverse bias is applied to the PIN photodiode, when light reflected via the touch body enters the fingerprint recognition sensor 31, incident photons are absorbed by the intrinsic semiconductor layer 312, since the reverse bias voltage between the P-type semiconductor layer 311 and the N-type semiconductor layer 313 is mainly concentrated on the intrinsic semiconductor layer 312, a high electric field region is formed in the intrinsic semiconductor layer 312, and the photo-generated carriers in the intrinsic semiconductor layer 312 accelerate under the action of a strong electric field, so that the conversion from optical signals to electrical signals is realized, in the fingerprint recognition process, since the intensity of the light reflected by the ridges and valleys of the touch subject received by the fingerprint recognition sensor 31 is different, the sizes of current/voltage signals converted from the reflected light formed at the ridge position and the reflected light formed at the valley position are different, and then fingerprint identification can be performed according to the sizes of the current/voltage signals.
Optionally, fig. 7 is a schematic circuit diagram of the display panel 10 provided in the embodiment of the present application, please refer to fig. 7, in which the display panel 10 further includes a second gate line 81 extending along the first direction and arranged along the second direction, and a second data line 82 extending along the second direction and arranged along the first direction;
two adjacent second gate lines 81 and two adjacent second data lines 82 intersect to define a pixel unit 60, one pixel unit 60 includes a pixel electrode 90 and a corresponding second thin film transistor 92, and the pixel electrode 90 is electrically connected to the corresponding second thin film transistor 92.
Specifically, referring to fig. 7, the display panel 10 includes second thin film transistors 92 arranged in an array, and as known, the basic structure of the second thin film transistors 92 includes a gate electrode electrically connected to the second gate line 81, a source electrode electrically connected to the second data line 82, and a drain electrode electrically connected to the pixel electrode 90. It should be noted that, because the display module 100 provided in the present application adopts the field sequential backlight module 20, there is no need to set color resistors in the display panel 10, in the prior art, a color resistor is set on the display panel 10, an area corresponding to each color resistor corresponds to one sub-pixel unit 60, each sub-pixel unit 60 corresponds to one pixel electrode 90, and each sub-pixel unit 60 needs to have a separate gate line, a separate data line, and a separate thin film transistor for control; in contrast to the prior art, the present application employs a field sequential backlight module 20 without color grouping, the display panel 10 does not include sub-pixel units 60, but directly introduces the pixel units 60, the area where one pixel unit 60 is located covers the area of at least three sub-pixel units 60 in the prior art, and the one pixel unit 60 only needs to be controlled by one second gate line 81, one second data line 82 and one second thin film transistor 92, compared with the prior art, each pixel unit 60 is equivalent to omitting at least two data lines, corresponding to omitting data lines of 2/3 in the whole display panel 10, thereby greatly reducing the crosstalk phenomenon that may be caused by dense signal lines after introducing the fingerprint identification component, greatly simplifying the wiring complexity of the display panel 10, and facilitating the simplification of the production process of the display module 100, the production efficiency of the display module 100 is improved.
Alternatively, fig. 8 is a schematic circuit connection diagram illustrating a pixel unit 60 and a fingerprint sensor 31 in a display module 100 provided in an embodiment of the present application, and fig. 9 is a diagram illustrating a relative position relationship between the pixel unit and the fingerprint sensor in the display module provided in the embodiment of the present application, please refer to fig. 8 and fig. 9, and an orthogonal projection of the first thin film transistor 71 and the second thin film transistor 92 on a plane of the array substrate 101 is located between the adjacent first gate line 61 and the second gate line 81.
Specifically, referring to fig. 8 and 9, in the display module 100 provided in the embodiment of the present application, after the fingerprint sensor 31 is introduced, the second gate line 81, the second data line 82 and the second thin film transistor 92 are separately disposed for the fingerprint sensor 31, and at this time, when the second thin film transistor 92 is disposed between the adjacent first gate line 61 and the adjacent second gate line 81, the space occupied by the introduced fingerprint identification module 30 is favorably reduced, and the distance between two adjacent pixel units 60 in the column direction is favorably reduced, so that the screen occupation ratio of the display module 100 after the fingerprint identification module 30 is introduced is favorably improved.
Optionally, fig. 10 is a cross-sectional view of a CC' of the display panel 10 in the display module 100 provided in the embodiment of fig. 1, where the embodiment shows a film structure diagram of the pixel unit 60, and in combination with fig. 3, fig. 8 and fig. 10, in the display module 100 provided in the embodiment of the present application, the first gate line 61 and the second gate line 81 are fabricated in the same process, the first data line 72 and the second data line 82 are fabricated in the same process, and the first thin film transistor 71 and the second thin film transistor 92 are fabricated in the same process. So, utilize the current production processes of display module assembly 100 can be integrated on display panel 10 with fingerprint identification module 30, therefore be favorable to practicing thrift display module assembly 100's production processes, promote display module assembly 100's production efficiency.
Optionally, referring to fig. 2, in this embodiment, the field sequential backlight module 20 is a direct-type backlight module, an orthogonal projection of the fingerprint sensor 31 on the plane of the array substrate 101 overlaps with at least a portion of the red light source 21, the green light source 22 and the blue light source 23, the red light source 21 overlapping with the fingerprint sensor 31 is a first red light source 21, the green light source 22 is a first green light source 22, and the blue light source 23 is a first blue light source 23;
during the fingerprint identification phase, at least the first red light source 21, the first green light source 22 and the first blue light source 23 are illuminated simultaneously.
Specifically, referring to fig. 2, when the field sequential backlight module 20 is a direct-type backlight module, the orthographic projection of the light sources in the field sequential backlight module 20 on the plane of the array substrate 101 is distributed on the whole display area 11, when the fingerprint sensor 31 is integrated on the display area 11, the orthographic projection of at least a part of the light sources on the plane of the substrate is overlapped with the fingerprint sensor 31, the part of the light sources includes the first red light source 21, the first green light source 22 and the first blue light source 23, at least the first red light source 21, the first green light source 22 and the first blue light source 23 emit light simultaneously during the fingerprint identification phase to provide light for the fingerprint identification process, the simultaneous emission of the three light sources is beneficial to increasing the amount of light emitted to the touch subject, and is more beneficial to increasing the instantaneous light intensity, thereby being beneficial to increasing the amount of light reflected from the touch subject to the fingerprint sensor 31, therefore, the sensitivity of the fingerprint identification sensor 31 is improved, and the use experience effect of a user is improved.
Optionally, fig. 11 is another AA' cross-sectional view of the display module 100 provided in the embodiment of fig. 1, in which the field sequential backlight module 20 is a side-in type backlight module, and in the fingerprint identification stage, the red light source 21, the green light source 22 and the blue light source 23 emit light simultaneously. When field sequential backlight unit 20 adopts the side income formula backlight unit, the fingerprint identification stage, all light sources in field sequential backlight unit 20 are luminous simultaneously to the touch main part can acquire more light, and then has more light to reflect to fingerprint identification sensor 31 via the touch main part, therefore more is favorable to promoting the sensitivity of fingerprint identification process, promotes user's use and experiences the effect.
Based on the same inventive concept, the present application further provides a display device 200, and fig. 12 is a schematic structural diagram of the display device 200 provided in the embodiment of the present application, and referring to fig. 12, the display device 200 includes the display module 100 in the present application. It should be noted that the display device 200 provided in the embodiment of the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. In the present application, the embodiment of the display device 200 can refer to any of the display modules 100 in the above embodiments, and repeated descriptions thereof are omitted here.
By the embodiment, the display module and the display device provided by the invention at least realize the following beneficial effects:
the application provides a display module and a display device, which comprise a display panel, a field sequential backlight module and a fingerprint identification module integrated on the display panel and positioned in a display area, wherein a pixel unit and a fingerprint identification sensor are arranged in an opening area; at the fingerprint identification stage, red light source among the field sequential backlight unit, at least both in green light source and the blue light source are luminous simultaneously, be favorable to increasing light intensity in the twinkling of an eye, just so can have more light irradiation to touch the main part, light via touching the main part reflection to fingerprint identification sensor will increase, thereby more be favorable to fingerprint identification sensor to gathering the light signal of incidenting above that, thereby be favorable to promoting the sensitivity of display module assembly fingerprint identification process, be favorable to promoting user's use experience effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. A display module is characterized by being provided with a display area and a non-display area surrounding the display area, wherein the display area comprises an opening area and a non-opening area;
the display module comprises a display panel, a field sequential backlight module and a fingerprint identification module, wherein the display panel is positioned in the light emergent direction of the field sequential backlight module, and the fingerprint identification module is integrated in the display panel;
the display panel comprises at least one pixel unit positioned in the opening area, the fingerprint identification module comprises at least one fingerprint identification sensor positioned in the opening area, at least one first storage capacitor, at least one first thin film transistor, a first gate line extending along a first direction and arranged along a second direction, and a first data line extending along the second direction and arranged along the first direction, and the first direction and the second direction are crossed; the grid electrodes of the first thin film transistors arranged along the first direction are connected with the same first grid line, the first poles of the first thin film transistors arranged along the second direction are connected with the same first data line, and the second poles of the first thin film transistors are respectively and electrically connected with the fingerprint identification sensor and the first storage capacitor;
the display panel further comprises a second gate line extending along the first direction and arranged along the second direction and a second data line extending along the second direction and arranged along the first direction; two adjacent second gate lines and two adjacent second data lines are crossed to define one pixel unit, and one pixel unit comprises one pixel electrode and is correspondingly provided with a second thin film transistor; the gates of the second thin film transistors arranged along the first direction are connected with the same second gate line, the first poles of the second thin film transistors arranged along the second direction are connected with the same second data line, and the second poles of the second thin film transistors are electrically connected with the pixel electrodes correspondingly arranged with the second thin film transistors; the orthographic projection of the first thin film transistor and the second thin film transistor on the plane of the array substrate is positioned between the adjacent first gate line and the second gate line;
the field sequential backlight module comprises a red light source, a green light source and a blue light source;
in a display stage, the red light source, the green light source and the blue light source respectively emit light; at least two of the red light source, the green light source, and the blue light source are simultaneously illuminated during the fingerprint identification phase.
2. The display module according to claim 1, wherein the display panel comprises an array substrate and a color film substrate which are arranged oppositely, and the fingerprint identification module is integrated with the array substrate;
the color film substrate comprises a light shield located in the non-opening area, and the orthographic projection of the light shield on the plane where the array substrate is located is not overlapped with the orthographic projection of the fingerprint identification sensor on the plane where the array substrate is located.
3. The display module according to claim 1, wherein the fingerprint sensor comprises a P-type semiconductor layer, an intrinsic semiconductor layer and an N-type semiconductor layer, which are sequentially disposed.
4. The display module of claim 1, wherein the first gate line and the second gate line are fabricated in a same process, the first data line and the second data line are fabricated in a same process, and the first thin film transistor and the second thin film transistor are fabricated in a same process.
5. The display module according to claim 1, wherein the field sequential backlight module is a direct-type backlight module, an orthographic projection of the fingerprint sensor on a plane of the array substrate overlaps with at least a portion of the red light source, the green light source and the blue light source, the red light source overlapping with the fingerprint sensor is a first red light source, the green light source is a first green light source, and the blue light source is a first blue light source;
during a fingerprint identification phase, at least the first red light source, the first green light source and the first blue light source are simultaneously illuminated.
6. The display module according to claim 1, wherein the field sequential backlight module is a side-in type backlight module, and each of the red light source, the green light source and the blue light source emits light simultaneously during the fingerprint recognition stage.
7. A display device, comprising the display module of any one of claims 1 to 6.
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| CN112563303B (en) * | 2019-09-25 | 2023-02-03 | 上海和辉光电股份有限公司 | Display panel and display device |
| CN110850626A (en) * | 2019-11-28 | 2020-02-28 | 厦门天马微电子有限公司 | Liquid crystal display panel and display device |
| CN110941117B (en) * | 2019-11-28 | 2021-09-03 | 武汉华星光电技术有限公司 | Display panel and electronic device |
| CN110931533B (en) * | 2019-12-10 | 2022-11-25 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN111126348B (en) * | 2020-01-10 | 2023-05-19 | 上海箩箕技术有限公司 | Display and input device |
| CN111259752B (en) * | 2020-01-10 | 2023-05-12 | 上海箩箕技术有限公司 | Display and input device |
| CN111258101A (en) | 2020-03-18 | 2020-06-09 | 武汉华星光电技术有限公司 | Display device |
| CN113569601A (en) * | 2020-04-28 | 2021-10-29 | 华为技术有限公司 | Under-screen fingerprint identification system and electronic equipment |
| CN111752030B (en) * | 2020-07-29 | 2023-09-19 | 京东方科技集团股份有限公司 | Display substrate, liquid crystal display panel and liquid crystal display device |
| CN111965894B (en) * | 2020-08-19 | 2022-05-24 | 厦门天马微电子有限公司 | Display module and control method thereof |
| CN112861763B (en) * | 2021-02-25 | 2024-09-13 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN113257207B (en) | 2021-05-25 | 2023-05-09 | 武汉华星光电技术有限公司 | Field sequential liquid crystal display device |
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