CN112257631B - Display module and control method thereof - Google Patents
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- CN112257631B CN112257631B CN202011182977.1A CN202011182977A CN112257631B CN 112257631 B CN112257631 B CN 112257631B CN 202011182977 A CN202011182977 A CN 202011182977A CN 112257631 B CN112257631 B CN 112257631B
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- 239000008186 active pharmaceutical agent Substances 0.000 description 28
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- 238000004519 manufacturing process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 206010070834 Sensitisation Diseases 0.000 description 1
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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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- 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
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
- G06V40/1376—Matching features related to ridge properties or fingerprint texture
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Abstract
The invention discloses a display module and a control method of the display module. The display module includes: the display panel comprises a display surface and a non-display surface which are opposite to each other, wherein the display surface comprises a first display area and a second display area at least partially surrounding the first display area, the light transmittance of the first display area is larger than that of the second display area, and the first display area comprises a plurality of pixel areas and a plurality of light transmittance areas which are arranged in an array; a photosensitive element; and the fingerprint identification module is arranged on the side of the non-display surface of the display panel, and the front projection of the photosensitive element on the display surface and the front projection of the fingerprint identification module on the display surface are both positioned in the first display area, wherein the front projection of the photosensitive element on the display surface covers at least one light transmission area. According to the display module provided by the embodiment of the invention, the displayable area occupation ratio of the display module integrated with the photosensitive element and the fingerprint identification module can be improved.
Description
Technical Field
The invention relates to the field of display, in particular to a display module and a control method of the display module.
Background
With the continuous development of display technology, users have increasingly demanded visual effects of electronic devices including display panels, wherein the requirements for the area ratio of the display panels, i.e., the screen ratio, on the electronic devices are more stringent.
Conventional electronic devices, such as mobile phones, tablet computers, and the like, need to integrate a front-end camera module, a fingerprint identification module, and the like. In the prior art, an electronic device needs to reserve a certain arrangement area for a front-mounted camera module, a fingerprint identification module and the like, so that the electronic device cannot display pictures in an area integrating the front-mounted camera module, the fingerprint identification module and the like.
Disclosure of Invention
The invention provides a display module and a control method of the display module, which can improve the display area occupation ratio of the display module integrated with other functional components.
In one aspect, an embodiment of the present invention provides a display module, including: the display panel comprises a display surface and a non-display surface which are opposite to each other, wherein the display surface comprises a first display area and a second display area at least partially surrounding the first display area, the light transmittance of the first display area is larger than that of the second display area, and the first display area comprises a plurality of pixel areas and a plurality of light transmittance areas which are arranged in an array; a photosensitive element; and the fingerprint identification module is arranged on the side of the non-display surface of the display panel, and the front projection of the photosensitive element on the display surface and the front projection of the fingerprint identification module on the display surface are both positioned in the first display area, wherein the front projection of the photosensitive element on the display surface covers at least one light transmission area.
In another aspect, an embodiment of the present invention provides a control method for controlling a display module according to any one of the foregoing embodiments of the present invention, where the control method includes: in the normal display mode, the pictures are displayed through the first display area and the second display area at the same time; in a fingerprint identification mode, configuring the first display area into a non-display state, and receiving fingerprint information through a fingerprint identification module; in the photosensitive recognition mode, optical information is received by the photosensitive element.
According to the display module provided by the embodiment of the invention, the light transmittance of the first display area is larger than that of the second display area, and the front projection of the photosensitive element on the display surface and the front projection of the fingerprint identification module on the display surface are both positioned in the first display area. The first display area comprises a plurality of light transmission areas, and the orthographic projection of the photosensitive element on the display surface covers at least one light transmission area, so that the photosensitive element can receive the optical information transmitted through the first light transmission area, and the corresponding photosensitive function is realized. The display module can display pictures in the first display area, fingerprint identification and photosensitive functions can be realized, and the integration of the display module is improved, so that the high-screen-ratio comprehensive screen design is realized conveniently. In the display module of the embodiment of the invention, the photosensitive element and the fingerprint identification module are corresponding to the first display area, so that the display panel is prevented from being designed in a large number of areas on the display panel and is different from the conventional areas, the manufacturing difficulty is reduced, and the phenomenon of uneven display is restrained to a certain extent.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale.
Fig. 1 is a schematic top view of a display module according to an embodiment of the invention;
FIG. 2 is an enlarged partial schematic view of the region Q1 of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;
fig. 4 is a schematic top view of a display module according to another embodiment of the invention;
FIG. 5 is a schematic cross-sectional view taken in the direction B-B of FIG. 4;
fig. 6 is a schematic top view of a display module according to another embodiment of the invention;
FIG. 7 is a schematic view of the cross-section in the direction C-C of FIG. 6
Fig. 8 is a schematic top view of a display module according to another embodiment of the invention;
FIG. 9 is an enlarged partial schematic view of the first display area of FIG. 8;
FIG. 10 is a schematic cross-sectional view taken in the direction D-D of FIG. 9;
FIG. 11 is a schematic top view of a display module according to another embodiment of the invention;
FIG. 12 is an enlarged partial schematic view of the first display area of FIG. 11;
FIG. 13 is a schematic cross-sectional view taken along the E-E direction in FIG. 12;
fig. 14 is a schematic top view of a display module according to another embodiment of the invention;
FIG. 15 is a schematic cross-sectional view in the F-F direction of FIG. 14;
fig. 16 is a schematic top view of a display module according to another embodiment of the invention;
fig. 17 is a schematic cross-sectional view in the direction G-G of fig. 16.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.
The embodiment of the invention provides a display module, and the display module of various embodiments of the invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic top view of a display module according to an embodiment of the invention, fig. 2 is an enlarged partial view of a region Q1 in fig. 1, and fig. 3 is a schematic cross-sectional view of A-A in fig. 2. The display module 100 includes a display panel 110, a photosensitive element 120, and a fingerprint recognition module 130.
The display panel 110 includes opposing display surfaces DS and non-display surfaces NS. The display surface DS includes a first display area DA1 and a second display area DA2 at least partially surrounding the first display area DA 1. The light transmittance of the first display area DA1 is greater than that of the second display area DA2. Optionally, the display panel 110 further includes a non-display area NA disposed around the second display area DA2 and the first display area DA 1. In the present embodiment, the second display area DA2 is disposed entirely around the first display area DA1 as an example, and in other alternative embodiments, the second display area DA2 may be disposed partially around the first display area DA 1.
The display panel 110 may be an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel, a display panel using a light emitting diode (Light Emitting Diode, LED) device, etc., which is, for example, a Micro light emitting diode (Micro-LED) display panel.
The first display area DA1 includes a plurality of pixel areas PA and a plurality of light-transmitting areas TA arranged in an array. The pixel area PA is used to arrange the first sub-pixel. The display panel 110 may include a plurality of layers stacked, wherein a material of the display panel 110 in the light-transmitting area TA is a light-transmitting material, i.e. a material layer extending to the light-transmitting area TA is a light-transmitting material layer.
The photosensitive element 120 and the fingerprint recognition module 130 are disposed on the non-display surface NS of the display panel 110. The front projection of the photosensitive element 120 on the display surface DS and the front projection of the fingerprint identification module 130 on the display surface DS are both located in the first display area DA1, wherein the front projection of the photosensitive element 120 on the display surface DS covers at least one light transmission area TA.
According to the display module 100 of the embodiment of the invention, the light transmittance of the first display area DA1 is greater than the light transmittance of the second display area DA2, and both the front projection of the photosensitive element 120 on the display surface DS and the front projection of the fingerprint identification module 130 on the display surface DS are located in the first display area DA 1. The first display area DA1 includes a plurality of light-transmitting areas TA, and the front projection of the photosensitive element 120 on the display surface DS covers at least one light-transmitting area TA, so that the photosensitive element 120 can receive the optical information transmitted through the first light-transmitting area TA, and implement a corresponding photosensitive function. The display module 100 can display pictures in the first display area DA1, can also realize fingerprint identification and sensitization functions, and improves the integration of the display module 100, so that the high-screen-ratio comprehensive screen design is conveniently realized. In the display module 100 according to the embodiment of the present invention, the photosensitive element 120 and the fingerprint identification module 130 correspond to the first display area DA1, so that the display panel 110 is designed to be different from the conventional area in a larger number of areas on the display panel 110, the manufacturing difficulty is reduced, and the display unevenness is suppressed to a certain extent.
The photosensitive element 120 includes at least one of an image capturing element, an infrared light sensor, and an ambient light sensor. For example, the photosensitive element 120 may be an image pickup element, i.e., an image pickup element, for picking up external image information. In this embodiment, the photosensitive element 120 is a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) image capturing element, and in other embodiments, the photosensitive element 120 may be another type of image capturing element such as a Charge-coupled Device (CCD) image capturing element. It is understood that the photosensitive element 120 may not be limited to an image capturing element, for example, in some embodiments, the photosensitive element 120 may also be an infrared light sensor, an ambient light sensor, or the like.
Optionally, the fingerprint recognition module 130 is a capacitive fingerprint recognition module, an ultrasonic fingerprint recognition module, or an optical fingerprint recognition module.
Optionally, the fingerprint recognition module 130 is an optical fingerprint recognition module, which includes an optical fingerprint sensor, and when the fingerprint recognition module 130 is an optical fingerprint recognition module, the orthographic projection of the optical fingerprint sensor on the display surface DS covers at least one light transmission area TA. Optionally, the optical fingerprint recognition module may further include a fingerprint recognition light source for emitting light toward the finger direction. In some embodiments, the optical fingerprint recognition module may not include a fingerprint recognition light source, but may also use at least a portion of the display panel 110 as a fingerprint recognition light source. In the fingerprint identification mode, the finger is in the first display area DA1, the light generated by the fingerprint identification light source irradiates the finger, the finger reflects the light, and the reflected light irradiates the optical fingerprint sensor through the light transmission area TA. The optical fingerprint sensor can convert optical signals into electric signals, wherein light rays reflected by the ridge part and the groove part of the fingerprint are respectively converted into different electric signals correspondingly, so that the optical fingerprint sensor can acquire picture information of the ridge part and the groove part of the fingerprint, and the acquisition of the fingerprint information is realized.
Optionally, the fingerprint recognition module 130 is a capacitive fingerprint recognition module, and the capacitive fingerprint recognition module may be a plate capacitive fingerprint recognition device, or may be other capacitive recognition devices such as a pressure-sensitive capacitive fingerprint recognition device. Taking the fingerprint recognition module 130 of the present embodiment as an example, the flat capacitive fingerprint recognition device includes capacitance plates of a plurality of capacitors arranged in an array. In the fingerprint identification mode, a finger is coupled with a plurality of capacitance polar plates in a first display area DA1, so that the capacitance value of a corresponding capacitor is changed, the influence of ridge parts and groove parts of the fingerprint on the capacitance value of the capacitor is different, and the capacitance fingerprint identification module can acquire information of the ridge parts and the groove parts of the fingerprint so as to describe the graph of the fingerprint, thereby realizing acquisition of fingerprint information.
Alternatively, the fingerprint recognition module 130 is an ultrasonic fingerprint recognition module, and the ultrasonic fingerprint recognition module may transmit ultrasonic waves to the display surface DS side of the display panel, and receive and analyze the reflected ultrasonic waves. In the fingerprint recognition mode, the ultrasonic fingerprint recognition module emits ultrasonic waves to the display surface DS side of the display panel 110, the ultrasonic waves are reflected at the finger surface, and the reflected ultrasonic waves are received by the ultrasonic fingerprint recognition module. The ultrasonic fingerprint identification module can acquire information of the ridge part and the groove part of the fingerprint, and thus fingerprint information is acquired.
In some embodiments, the fingerprint recognition module 130 is a capacitive fingerprint recognition module or an ultrasonic fingerprint recognition module, and in the fingerprint recognition mode, the first display area DA1 is configured to be in a non-display state, that is, the first display area DA1 does not need to emit light, so that the problem that the performance of the light-emitting elements of the first display area DA1 is easy to be attenuated due to the fact that the light-emitting time of the first display area DA1 is longer than that of the second display area DA2 is avoided, and the overall display brightness uniformity and the service life of the display panel 110 are improved.
As shown in fig. 2, in some embodiments, the display panel 110 includes a plurality of first sub-pixels SP1 and a plurality of second sub-pixels SP2. The plurality of first sub-pixels SP1 are disposed in the first display area DA1, i.e. the first sub-pixels SP1 are arranged in a plurality of rows and a plurality of columns in the first display area DA 1. The plurality of second sub-pixel SP2 arrays are disposed in the second display area DA2. As described above, the first display area DA1 includes the plurality of pixel areas PA arranged in an array, wherein the pixel areas PA are used to arrange the first sub-pixels SP1, and specifically, each pixel area PA of the first display area DA1 may be provided with at least one first sub-pixel SP1. The first subpixel SP1 and the second subpixel SP2 are light emitting elements, and the display panel 110 is an OLED display panel, for example, the first subpixel SP1 and the second subpixel SP2 are OLED light emitting elements, respectively. Alternatively, the display panel 110 may include a plurality of pixel circuits, each of which is electrically connected to a corresponding sub-pixel to drive the corresponding sub-pixel to emit light. The first sub-pixel SP1 and the second sub-pixel SP2 may be respectively divided into a plurality of types according to different colors to realize color display. In one example, the first sub-pixel SP1 on the display panel 110 includes a red first sub-pixel, a green first sub-pixel, and a blue first sub-pixel, and the second sub-pixel SP2 also includes a red second sub-pixel, a green second sub-pixel, and a blue second sub-pixel.
In some embodiments, the pixel density of the first sub-pixel SP1 is smaller than that of the second sub-pixel SP2, so that the duty ratio of the pixel area PA in the first display area DA1 can be reduced to a certain extent, and accordingly, the duty ratio of the light transmitting area TA in the first display area DA1 can be increased, so that the light transmittance of the display panel 110 in the first display area DA1 is increased. The improvement of the light transmittance of the first display area DA1 is beneficial to improving the photosensitive image quality of the photosensitive elements 120 arranged corresponding to the first display area DA 1.
Fig. 4 is a schematic top view of a display module according to another embodiment of the invention, and fig. 5 is a schematic cross-sectional view of fig. 4 in the direction B-B. The first display area DA1 includes a first sub-area SA1 and a second sub-area SA2 disposed adjacently, and an orthographic projection of the photosensitive element 120 on the display surface DS is located in the first sub-area SA1, and an orthographic projection of the fingerprint identification module 130 on the display surface DS is located in the second sub-area SA 2. The photosensitive element 120 and the fingerprint identification module 130 are not overlapped on a plane parallel to the display surface DS, so that mutual interference of the photosensitive element 120 and the fingerprint identification module 130 in respective working states is reduced to a certain extent, and the photosensitive accuracy of the photosensitive element 120 and the fingerprint identification accuracy of the fingerprint identification module 130 are improved.
With continued reference to fig. 4 and fig. 5, alternatively, the first sub-area SA1 and the second sub-area SA2 are arranged adjacently along the row direction of the first sub-pixel SP1, and accordingly, the photosensitive element 120 and the fingerprint recognition module 130 are sequentially arranged along the row direction, and are not overlapped, so as to reduce mutual interference. The photosensitive element 120 and the fingerprint recognition module 130 may be disposed adjacent to each other or may be disposed at a distance from each other.
Fig. 6 is a schematic top view of a display module according to another embodiment of the invention, and fig. 7 is a schematic cross-sectional view taken along the direction C-C in fig. 6. In this embodiment, the first display area DA1 includes a first sub-area SA1 and a second sub-area SA2 disposed adjacently, the front projection of the photosensitive element 120 on the display surface DS is located in the first sub-area SA1, and the front projection of the fingerprint identification module 130 on the display surface DS is located in the second sub-area SA 2. Unlike the foregoing embodiment, in the present embodiment, the second sub-area SA2 is disposed around the periphery of the first sub-area SA1, and accordingly, the fingerprint recognition module 130 is disposed around the periphery of the first sub-area SA1, so that the fingerprint recognition module 130 and the photosensitive element 120 are more tightly integrated in the first display area DA1 on the premise that the fingerprint recognition module 130 and the photosensitive element 120 are not overlapped, the integration level of the display module 100 is improved, the required area of the first display area DA1 is reduced, and the display module 100 is conveniently incorporated in an electronic device with higher integration level.
Fig. 8 is a schematic top view of a display module according to another embodiment of the invention, fig. 9 is a schematic enlarged partial view of the first display area in fig. 8, and fig. 10 is a schematic cross-sectional view of the first display area in the direction D-D in fig. 9. In some embodiments, the fingerprint recognition module 130 includes a plurality of fingerprint recognition sub-modules 131, and the plurality of fingerprint recognition sub-modules 131 are arranged in an array in the second sub-area SA 2. Each fingerprint identification sub-module 131 can identify fingerprint point information of a corresponding point, and more complete fingerprint information can be depicted by collecting fingerprint point information of the fingerprint identification sub-modules 131 arranged in a whole row, so that a fingerprint identification function is realized.
In this embodiment, the fingerprint recognition module 130 is an optical fingerprint recognition module, as shown in fig. 8 and 9, and the orthographic projection of at least one fingerprint recognition sub-module 131 on the display surface DS is located in a light transmission area TA. In the fingerprint recognition mode, the light reflected by the finger surface can reach the fingerprint recognition sub-module 131 through the light transmission area TA, and is received and recognized by the fingerprint recognition sub-module 131, so that the recognition rate of optical fingerprint recognition is improved.
In other embodiments, the fingerprint recognition module 130 may be a capacitive fingerprint recognition module or an ultrasonic fingerprint recognition module, where the fingerprint recognition sub-module 131 is not limited to being disposed corresponding to the light transmission area TA, and still can implement a stable fingerprint recognition function.
Fig. 11 is a schematic top view of a display module according to another embodiment of the invention, fig. 12 is a schematic enlarged partial view of the first display area in fig. 11, and fig. 13 is a schematic cross-sectional view of the first display area in fig. 12 in the E-E direction. In some alternative embodiments, the first display area DA1 includes a first sub-area SA1 and a second sub-area SA2 that are adjacently disposed, wherein the second sub-area SA2 is disposed around the outer circumference of the first sub-area SA 1. The front projection of the photosensitive element 120 on the display surface DS is located in the first sub-area SA1, and the front projection of the fingerprint recognition module 130 on the display surface DS is located in the second sub-area SA 2. In this embodiment, the fingerprint recognition module 130 includes a plurality of fingerprint recognition sub-modules 131, and the plurality of fingerprint recognition sub-modules 131 are arranged in an array in the second sub-area SA 2. At this time, the plurality of fingerprint recognition sub-modules 131 are distributed around the photosensitive element 120.
In this embodiment, the fingerprint recognition module 130 is an ultrasonic fingerprint recognition module, which may include an ultrasonic transmitter and an ultrasonic detector, where the ultrasonic transmitter is used to transmit ultrasonic waves to the display surface DS of the display panel 110. The ultrasonic probe is configured to receive ultrasonic waves reflected by the object to be measured on the display surface DS side of the display panel 110. One or more of the fingerprint recognition sub-modules 131 are ultrasonic transmitters, and the other fingerprint recognition sub-modules 131 are ultrasonic detectors. Or in some embodiments, each of the fingerprint recognition sub-modules 131 includes an ultrasonic emitter and an ultrasonic detector.
Fig. 14 is a schematic top view of a display module according to another embodiment of the invention, and fig. 15 is a schematic cross-sectional view of fig. 14 in the F-F direction. In some alternative embodiments, the first display area DA1 includes a first sub-area SA1 and a second sub-area SA2 that are adjacently disposed, wherein the first sub-area SA1 and the second sub-area SA2 are adjacently arranged along the row direction of the first sub-pixel. The front projection of the photosensitive element 120 on the display surface DS is located in the first sub-area SA1, and the front projection of the fingerprint recognition module 130 on the display surface DS is located in the second sub-area SA 2. In this embodiment, the fingerprint recognition module 130 includes a plurality of fingerprint recognition sub-modules 131, and the plurality of fingerprint recognition sub-modules 131 are arranged in an array in the second sub-area SA 2. At this time, the plurality of fingerprint recognition sub-modules 131 are distributed at one side of the photosensitive element 120.
In this embodiment, the fingerprint recognition module 130 is an ultrasonic fingerprint recognition module, one or more fingerprint recognition sub-modules 131 of the plurality of fingerprint recognition sub-modules 131 are ultrasonic transmitters, and other fingerprint recognition sub-modules 131 are ultrasonic detectors. Alternatively, each of the fingerprint recognition sub-modules 131 includes an ultrasonic emitter and an ultrasonic detector.
Fig. 16 is a schematic top view of a display module according to another embodiment of the invention, and fig. 17 is a schematic cross-sectional view of fig. 16 in the G-G direction. In some alternative embodiments, the fingerprint recognition module 130 is located on a side of the photosensitive element 120 facing away from the display panel 110, and the front projection of the fingerprint recognition module 130 on the display surface DS overlaps with the front projection of the photosensitive element 120 on the display surface DS. For example, in the present embodiment, the fingerprint recognition module 130 and the photosensitive element 120 are stacked on the non-display surface NS side of the display panel 110, and since the fingerprint recognition module 130 and the photosensitive element 120 are stacked on the plane perpendicular to the display panel 110, the area occupied by the fingerprint recognition module 130 and the photosensitive element 120 on the plane parallel to the display panel 110 is smaller, the integration of the fingerprint recognition module 130, the photosensitive element 120 and the display panel 110 on the plane parallel to the display panel 110 is improved, and the required area of the first display area DA1 is reduced.
With continued reference to fig. 16 and 17, in the present embodiment, the fingerprint recognition module 130 is an ultrasonic fingerprint recognition module, and the ultrasonic fingerprint recognition module uses ultrasonic waves to realize fingerprint recognition, so that the fingerprint recognition function can be stably realized even if the ultrasonic fingerprint recognition module is located on the side of the photosensitive element 120 away from the display panel 110.
With continued reference to fig. 16 and 17, when the fingerprint recognition module 130 is an ultrasonic fingerprint recognition module, the ultrasonic fingerprint recognition module optionally includes an ultrasonic emitter 130a and an ultrasonic detector 130b. The ultrasonic emitter 130a emits ultrasonic waves toward the display surface DS of the display panel 110. The ultrasonic probe 130b receives ultrasonic waves reflected by the object to be measured on the display surface DS side of the display panel 110. In the fingerprint recognition mode, the ultrasonic transmitter 130a transmits ultrasonic waves to the display surface DS side of the display panel 110, the ultrasonic waves are reflected at the finger surface, and the reflected ultrasonic waves are received by the ultrasonic detector 130b. The ultrasonic wave reflected by the ridge and the groove of the fingerprint respectively reaches the ultrasonic detector 130b in time sequence and with different sound wave intensity, so that the ultrasonic detector 130b can acquire information of the ridge and the groove on the fingerprint, thereby realizing acquisition of fingerprint information.
In the above embodiment, the fingerprint recognition module 130 is an ultrasonic fingerprint recognition module, and the ultrasonic fingerprint recognition module can recognize three-dimensional details and unique fingerprint features in the fingerprint, including fingerprint ridges, furrows, pores, and the like. Based on the ability of ultrasonic wave to penetrate the material, under the condition that dirt, water, sweat and the like exist on the finger, the ultrasonic fingerprint identification module can still accurately identify the fingerprint, so that the identification precision is higher, and in addition, the imitation fingerprint can be identified.
In the above embodiment, the ultrasonic emitter 130a and the ultrasonic detector 130b are integrally provided, and the ultrasonic fingerprint recognition module is single. In other embodiments, the ultrasonic emitter 130a and the ultrasonic detector 130b may be disposed apart from each other. Further, the ultrasound fingerprint recognition module may not be limited to a single or whole arrangement, but may be a plurality of numbers, or include a plurality of sub-modules, a plurality of ultrasound fingerprint recognition modules, or a plurality of sub-module array arrangements.
The embodiment of the invention also provides a control method of the display module, which is used for controlling the display module 100 according to any of the embodiments of the invention. The display module 100 may include a normal display mode, a fingerprint recognition mode, and a light sensing recognition mode.
The control method of the display module may include: in the normal display mode, the screen is simultaneously displayed through the first display area DA1 and the second display area DA2. In the fingerprint recognition mode, the first display area DA1 is configured to be in a non-display state while receiving fingerprint information through the fingerprint recognition module 130. In the photosensitive recognition mode, optical information is received through the photosensitive element 120.
According to the display module 100 of the embodiment of the invention, the display module 100 has various functions such as normal display, fingerprint identification and photosensitive identification. In the fingerprint recognition mode, fingerprint information can be received, so that fingerprint recognition can be realized, and further, security authentication functions such as user authentication, security payment and the like related to fingerprint recognition can be realized. In the photosensitive recognition mode, optical information can be received to realize a corresponding photosensitive function, for example, the photosensitive element 120 includes at least one of an image capturing element, an infrared light sensor, and an ambient light sensor, and in the photosensitive recognition mode, the functions of image capturing, infrared light recognition, and ambient light recognition can be realized. In addition, in the normal display mode, the first display area DA1 and the second display area DA2 display images simultaneously, wherein the first display area DA1 integrating the fingerprint recognition and the photosensitive recognition functions can also display images, so that the duty ratio of the displayable area of the display module 100 is improved, and the screen duty ratio of the electronic device provided with the display module 100 is conveniently improved.
Alternatively, the photosensitive element 120 is an image capturing element, i.e., the photosensitive element 120 is an image capturing device. In the photosensitive recognition mode, the first display area DA1 is also configured in a non-display state, so that imaging interference of light rays emitted by the first sub-pixels SP1 of the first display area DA1 on an external real picture is avoided, the authenticity of the acquired image of the photosensitive element 120 is improved, and the quality of the acquired image is improved.
Optionally, the display panel 110 is a touch display panel 110, and at this time, the display panel 110 includes a touch layer. When the fingerprint recognition module 130 is a capacitive fingerprint recognition module, the control method of the display module may further include: in the normal display mode, the fingerprint recognition module 130 is also configured to be in a non-operating state. In the fingerprint recognition mode, the touch function of the display panel 110 is turned off. According to the control method, the touch function and the capacitive fingerprint recognition function of the display module 100 are set in a time-sharing manner, and in the normal display mode, the fingerprint recognition module 130 does not work, so that the capacitive influence of the fingerprint recognition module 130 on the touch layer of the display panel is avoided, and the accuracy of touch operation in the normal display mode is improved. In the fingerprint identification module, the touch function of the display panel 110 is turned off, so that the influence of the touch layer on the capacitance of the fingerprint identification module can be avoided, and the identification rate of fingerprint identification operation is improved.
These embodiments are not exhaustive or to limit the invention to the precise embodiments disclosed, and according to the invention described above. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (13)
1. A display module, comprising:
the display panel comprises a display surface and a non-display surface which are opposite, wherein the display surface comprises a first display area and a second display area at least partially surrounding the first display area, the light transmittance of the first display area is larger than that of the second display area, and the first display area comprises a plurality of pixel areas and a plurality of light transmittance areas which are arranged in an array;
a photosensitive element; and
the fingerprint identification module is used for identifying the fingerprint,
the light sensing element and the fingerprint identification module are arranged on the side of the non-display surface of the display panel, and the front projection of the light sensing element on the display surface and the front projection of the fingerprint identification module on the display surface are both positioned in the first display area, wherein the front projection of the light sensing element on the display surface covers at least one light transmission area;
the first display area comprises a first subarea and a second subarea which are adjacently arranged, the second subarea is arranged around the periphery of the first subarea, the orthographic projection of the photosensitive element on the display surface is positioned in the first subarea, and the orthographic projection of the fingerprint identification module on the display surface is positioned in the second subarea.
2. The display module of claim 1, wherein the display panel comprises:
the array is arranged in the first display area;
the array is arranged in the second display area, and the pixel density of the first sub-pixels is smaller than that of the second sub-pixels.
3. The display module of claim 1, wherein the first sub-region and the second sub-region are arranged adjacent to each other in a row direction of the first sub-pixel.
4. The display module of claim 1, wherein the fingerprint recognition module comprises a plurality of fingerprint recognition sub-modules arranged in an array in the second sub-area.
5. The display module of claim 4, wherein the fingerprint recognition module is an optical fingerprint recognition module, and an orthographic projection of at least one of the fingerprint recognition sub-modules on the display surface is located in one of the light-transmitting areas.
6. The display module of claim 1, wherein the fingerprint recognition module is located on a side of the photosensitive element facing away from the display panel, and an orthographic projection of the fingerprint recognition module on the display surface overlaps with an orthographic projection of the photosensitive element on the display surface.
7. The display module of claim 6, wherein the fingerprint recognition module is an ultrasonic fingerprint recognition module.
8. The display module of claim 1, wherein the fingerprint recognition module is a capacitive fingerprint recognition module, an ultrasonic fingerprint recognition module, or an optical fingerprint recognition module.
9. The display module of claim 1, wherein the fingerprint recognition module is an ultrasonic fingerprint recognition module, the ultrasonic fingerprint recognition module comprising:
an ultrasonic transmitter for transmitting ultrasonic waves to the display surface side of the display panel; and
an ultrasonic probe for receiving ultrasonic waves reflected by the object to be measured on the display surface side of the display panel.
10. The display module of claim 1, wherein the photosensitive element comprises at least one of an image capture element, an infrared light sensor, and an ambient light sensor.
11. A control method of a display module, for controlling the display module according to any one of claims 1 to 10, the control method comprising:
in a normal display mode, displaying pictures through the first display area and the second display area at the same time;
in a fingerprint identification mode, configuring the first display area into a non-display state, and receiving fingerprint information through the fingerprint identification module;
in the photosensitive recognition mode, optical information is received by the photosensitive element.
12. The control method according to claim 11, wherein the photosensitive element is an image pickup element, and the first display area is further configured to be in a non-display state in the photosensitive recognition mode.
13. The control method according to claim 11, wherein the display panel is a touch display panel, the fingerprint recognition module is a capacitive fingerprint recognition module, and wherein:
in the normal display mode, the fingerprint identification module is also configured to be in a non-working state;
and in the fingerprint identification mode, closing the touch control function of the display panel.
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