CN112232196B - Display device - Google Patents
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- CN112232196B CN112232196B CN202011103385.6A CN202011103385A CN112232196B CN 112232196 B CN112232196 B CN 112232196B CN 202011103385 A CN202011103385 A CN 202011103385A CN 112232196 B CN112232196 B CN 112232196B
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
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Abstract
The invention provides a display device, relates to the technical field of display, and aims to solve the technical problem that display differences exist in the display device. The display device comprises a screen body, a fingerprint identification module and an intermediate layer; the middle layer comprises a first film layer close to the fingerprint identification module and a second film layer which is positioned on the first film layer and close to the screen body, the first film layer comprises an open pore area and a non-open pore area, and the open pore area is opposite to the fingerprint identification module; the second film layer comprises a light transmission area and a transition area surrounding the light transmission area, the light transmission area is opposite to the central area of the open pore area, and the transition area is opposite to other areas outside the central area of the open pore area; the transmissivity of the transition area is smaller than or equal to the transmissivity of the light transmission area, the transmissivity of the transition area gradually decreases along the direction deviating from the light transmission area, when light irradiates the screen body from the opening area, the transition area gradually transits the light intensity of the second film layer, the illumination difference on the screen body is reduced, and mura (uneven chromaticity and brightness) and obvious boundaries are reduced or eliminated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device.
Background
With the development of display technology, a display device with a higher screen ratio can provide better visual experience, and gradually becomes a mainstream development direction. In order to ensure a higher screen ratio, the display device often uses an under-screen fingerprint (FINGERPRINT ON DISPLAY, abbreviated as FOD) technology to unlock the display screen.
The display device generally includes a display screen, a fingerprint recognition module disposed below the display screen, and an intermediate layer disposed between the display screen and the fingerprint recognition module. The middle layer generally comprises an open area and a non-open area, wherein the open area is opposite to the fingerprint identification module for the fingerprint identification module to acquire fingerprint information on the screen body.
However, when the display device displays, display differences and obvious boundaries such as mura (uneven chromaticity and brightness) occur in the area of the display screen corresponding to the open area and the non-open area, which affect the display effect of the display device.
Disclosure of Invention
In view of the foregoing, embodiments of the present invention provide a display device, which is configured to reduce or eliminate display differences and boundary phenomena of the display device, and improve a display effect of the display device.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
The embodiment of the invention provides a display device, which comprises a screen body, a fingerprint identification module and an intermediate layer positioned between the screen body and the fingerprint identification module; the middle layer comprises a first film layer close to the fingerprint identification module and a second film layer which is positioned on the first film layer and close to the screen body, the first film layer comprises an open pore area and a non-open pore area, and the open pore area is opposite to the fingerprint identification module; the second film layer comprises a light transmission area and a transition area surrounding the light transmission area, the light transmission area is opposite to the central area of the open pore area, and the transition area is opposite to other areas outside the central area of the open pore area; the transmittance of the transition region is smaller than or equal to that of the light-transmitting region, and gradually decreases along the direction deviating from the light-transmitting region.
The display device provided by the embodiment of the invention has the following advantages:
In the embodiment of the invention, the display device comprises a screen body, a fingerprint identification module and an intermediate layer, wherein the intermediate layer is positioned between the screen body and the fingerprint identification module and comprises a first film layer close to the fingerprint identification module and a second film layer close to the screen body, and the second film layer is positioned on the first film layer; the first film layer comprises an open pore area and a non-open pore area, the open pore area corresponds to the fingerprint identification module, the second film layer comprises a transition area and a light transmission area, and the transition area is arranged around the light transmission area; the light transmission area is opposite to the central area of the open area, so that the fingerprint identification module corresponding to the open area can receive light rays and identify fingerprint information; the transition area is opposite to other areas outside the center area of the open area and part of the non-open area, the transmittance of the transition area is smaller than or equal to that of the light transmission area, and the transmittance of the transition area gradually decreases along the direction away from the light transmission area; when light enters through the open area, the intensity of the light received by the screen body gradually decreases from the area corresponding to the open area to the area corresponding to the non-open area after the light passes through the second film layer, namely, the intensity of the light received by each area of the screen body gradually changes, so that the characteristic difference caused by illumination of each area of the screen body also gradually decreases, and the brightness of the screen body from the open area to the non-open area gradually changes during display, thereby reducing or eliminating the display difference and obvious boundary of chromaticity, brightness inequality and the like on the screen body and improving the display effect of the display device.
In the display device described above, the second film layer includes a support layer including the transition region and the light-transmitting region.
In the display device described above, the first film layer includes a bonding layer, a buffer layer, a heat insulating layer, and a metal layer that are stacked, where the metal layer is close to the fingerprint identification module; the open pore area penetrates through the bonding layer, the buffer layer, the heat insulation layer and the metal layer.
In the display device described above, the second film layer includes a supporting layer and an adhesive layer that are stacked, where the supporting layer is made of a light-transmitting material, and the supporting layer is close to the screen body; the adhesive layer includes the transition region and the light-transmitting region.
In the display device described above, the first film layer includes a buffer layer, a heat insulating layer, and a metal layer that are stacked, where the metal layer is close to the fingerprint identification module; the open pore area penetrates through the buffer layer, the heat insulation layer and the metal layer.
In the display device as described above, the transmittance of the transition region linearly decreases in a direction away from the light-transmitting region.
In the display device described above, the second film layer further includes an opaque region, the opaque region is disposed around the transition region, and a transmittance of the opaque region is less than or equal to a transmittance of the transition region.
In the display device, a plane parallel to the screen body is taken as a cross section, the cross section of the light transmitting area is round, oval, square or other regular polygon, and the cross section of the transition area is annular.
In the display device described above, the center line of the light-transmitting region coincides with the center line of the aperture region.
In the display device as described above, the transmittance of the light transmitting region is the same along the direction from the center of the light transmitting region to the edge of the light transmitting region.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a screen body according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of a first structure of a display device according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a second film layer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second structure of a display device according to an embodiment of the invention;
fig. 5 is a schematic diagram of a third structure of a display device according to an embodiment of the invention.
Reference numerals illustrate:
10-a screen body; 11-an information acquisition area;
20-a second film layer; 21-a light-transmitting region;
22-transition zone; 23-opaque region;
30-a first film layer; 40-a fingerprint identification module;
50-a support layer; 60-bonding layer;
70-a buffer layer; 80-a heat insulation layer;
90-metal layer.
Detailed Description
In the display device, a fingerprint identification module is arranged below the screen body, and an intermediate layer is arranged between the screen body and the fingerprint identification module. In order to ensure that the fingerprint recognition module can work normally, the middle layer generally comprises an open area and a non-open area, wherein the open area is opposite to the fingerprint recognition module, and the non-open area is generally opaque. In the production process of the display device, when the fingerprint identification module is not installed, light can enter from the open pore area and irradiates on the screen body, the area of the screen body corresponding to the open pore area receives light, and the area of the screen body corresponding to the non-open pore area hardly receives light, so that the illumination intensity of the two areas is different, characteristic difference is generated in the screen body, namely, characteristic difference is generated in a thin film transistor (Thin Film Transistor, TFT for short) in the screen body, the phenomenon of uneven chromaticity and brightness exists in the two areas corresponding to the open pore area and the non-open pore area of the screen body, and an obvious boundary is generated in the two areas.
In view of the above-mentioned drawbacks, an embodiment of the present invention provides an improved technical solution, in which the transmittance of an area of an intermediate layer corresponding to an open area gradually decreases from the center of the open area to the edge of the open area, so as to gradually decrease the intensity of light received from an area of the screen corresponding to the open area to an area corresponding to a non-open area during the production process of the display device and when the fingerprint recognition module is not installed, thereby reducing the characteristic difference between the area of the screen corresponding to the open area and the area corresponding to the non-open area, and reducing or eliminating the display difference and the obvious boundary when the screen is displayed.
In order to make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a display device according to an embodiment of the present invention includes a screen 10, and the screen 10 may be used to display screen information. The screen body 10 is provided with an information acquisition area 11, when the screen body 10 needs to be unlocked by fingerprints, the information acquisition area 11 is used for arranging the fingerprints in the information acquisition area 11, and the information acquisition area 11 is used for unlocking the screen body when determining that the fingerprint information is the fingerprint information of a set user by collecting and identifying the fingerprint information. The screen body 10 of the display device in the embodiment of the invention can be suitable for terminal equipment such as mobile phones, tablet computers, intelligent watches, intelligent bracelets, personal digital assistants and the like.
In one possible example, the screen body 10 may include a thin film transistor (Thin Film Transistor, abbreviated as TFT) array layer and an Organic LIGHT EMITTING Diode (abbreviated as OLED) layer disposed on the TFT array layer. The OLED layer can emit light actively without a backlight source, and the TFT array layer can control the OLED layer to emit light.
The light may cause a change in the characteristics of the TFT, for example, a shift in the threshold value of the TFT, and a change in the light emission luminance of the OLED layer. The different areas of the TFT array layer are different in illumination intensity, so that the characteristics of the TFTs in each area of the TFT array layer are different, the characteristics of the TFTs in the TFT array layer are different, the chromaticity and the brightness in the OLED layer are uneven, and even obvious boundaries are formed.
Referring to fig. 2, a fingerprint recognition module 40 is disposed below the screen 10 for recognizing a fingerprint. The fingerprint recognition module 40 generally includes an optical-based fingerprint recognition module, an ultrasonic-based fingerprint recognition module, and a capacitive-based fingerprint recognition module. The optical fingerprint recognition module 40 includes a fingerprint recognition module for capturing a fingerprint by using visible light and a fingerprint recognition module for capturing a fingerprint by using infrared light. The following embodiments of the present invention will be described in detail with reference to an optical-based fingerprint recognition module.
Illustratively, the screen 10 includes an OLED layer, when the information collecting area 11 of the screen 10 has a fingerprint, the light emitted by the OLED layer is reflected by the fingerprint on the screen 10 to enter the fingerprint recognition module 40, and the fingerprint recognition module 40 performs recognition of fingerprint information according to the received light.
With continued reference to fig. 2, an intermediate layer is disposed between the fingerprint recognition module 40 and the screen 10, and is used for supporting the screen 10. Specifically, the intermediate layer includes a first film layer 30 and a second film layer 20, the second film layer 20 is located on the first film layer 30, the second film layer 20 is close to the screen body 10, and the first film layer 30 is close to the fingerprint identification module 40. The first film 30 may contact the fingerprint recognition module 40, or may have a certain interval with the fingerprint recognition module 40. As shown in fig. 2, the fingerprint recognition module 40, the first film layer 30, the second film layer 20 and the screen body 10 are stacked from bottom to top.
The first film layer 30 includes an open area and a non-open area, wherein the open area is shown as an area a in fig. 2, and the open area is opposite to the fingerprint recognition module 40, for example, the fingerprint recognition module 40 is located right below the open area a, so as to ensure that the fingerprint recognition module 40 can better receive light. The non-apertured region of the first film layer 30 is shown as region B in fig. 2.
The open area of the first film layer 30 may be a through hole, i.e., the open area penetrates through the first film layer 30. The open area is typically filled with air, it being understood that the open area is transparent to light. The opening shape of the opening area may be circular, elliptical, quadrangular or other polygonal, and the opening shape of the opening area is not limited herein. In the embodiment of the invention, the opening area is circular, so that on one hand, the processing of the opening area is facilitated, and on the other hand, under the condition of the same perimeter, the circular opening has a larger area for light to enter.
The non-perforated area of the first film layer 30 is generally opaque to prevent interference light from entering the fingerprint identification module 40, so as to ensure that the fingerprint identification module 40 can work normally. For example, the first film layer 30 in the non-apertured region may be printed black or made of an opaque material.
With continued reference to fig. 2, the second film layer 20 may contact the panel 10 to support the panel 10, for example, the second film layer 20 supports the TFT array layer in the panel 10 to prevent the TFT array layer from bending, curling or being uneven, so as to improve the display effect of the display device.
The second film layer 20 includes a transition region 22 and a light-transmitting region 21, where the transition region 22 is adjacent to the light-transmitting region 21, for example, the transition region 22 is disposed around the light-transmitting region 21, i.e., the transition region 22 is sleeved outside the light-transmitting region 21. Referring to fig. 3, the cross-sectional shape of the light-transmitting region 21 may be circular, elliptical, quadrangular, or other polygonal shape, taking a plane parallel to the screen body 10 as a cross-section. When the cross-sectional shape of the light-transmitting region 21 may be circular, elliptical, square or other regular polygon, the light-transmitting region 21 has good symmetry. It is understood that when the cross-sectional shape of the light-transmitting region 21 is a regular polygon, and as the number of sides increases, the difference in the distances from each point on the edge of the light-transmitting region 21 to the center decreases.
With continued reference to fig. 3, the transition region 22 is annular in cross-sectional shape, with a plane parallel to the screen body 10. In the embodiment of the present invention, the cross-sectional shape of the transition region 22 is annular corresponding to the cross-sectional shape of the light-transmitting region 21. It will be appreciated that when the cross-sectional shape of the light-transmitting region 21 is elliptical, the cross-sectional shape of the transition region 22 is elliptical ring-shaped; when the cross-sectional shape of the light-transmitting region 21 is square, the cross-sectional shape of the transition region 22 is square ring-shaped.
The cross-sectional shape of the light-transmitting region 21 may be identical to the cross-sectional shape of the aperture region. Illustratively, the cross-sectional shape of the open area is circular, the cross-sectional shape of the light-transmitting area 21 is also circular, and the cross-sectional shape of the transition area 22 is circular.
With continued reference to fig. 2, the light-transmitting region 21 of the second film layer 20 is opposite to the central region of the open-pore region of the first film layer 30, or, the light-transmitting region 21 of the second film layer 20 and the open-pore region of the first film layer 30 are projected toward the screen body 10, and the orthographic projection of the light-transmitting region 21 of the second film layer 20 is located in the orthographic projection of the opening of the first film layer 30, that is, the cross-sectional area of the light-transmitting region 21 of the second film layer 20 is smaller than the cross-sectional area of the open-pore region of the first film layer 30.
In order to improve the accuracy of fingerprint recognition of the fingerprint recognition module 40, the center line of the light transmission area 21 may coincide with the center line of the hole opening area, so that more light enters the fingerprint recognition module 40 through the hole opening area, thereby ensuring the accuracy of fingerprint recognition of the fingerprint recognition module 40.
The light-transmitting area 21 may have a higher transmittance, for example, the transmittance of the light-transmitting area 21 is greater than 80%, so as to ensure that the fingerprint identification module 40 can receive light. Along the direction from the center of the light transmission area 21 to the edge of the light transmission area 21, the transmittance of the light transmission area 21 is the same, namely the transmittance of each area in the light transmission area 21 is the same, so that on one hand, the fingerprint identification module 40 can receive more light rays for fingerprint identification, and on the other hand, the transmittance is the same, thereby facilitating the processing of the light transmission area 21.
The transition region 22 is opposite the other regions outside the central region of the open area, i.e. the transition region 22 is opposite part of the open area. Specifically, the open area is divided into a central area and an edge area located at the periphery of the central area, the transition area 22 is opposite to the edge area of the open area, for example, the transition area 22 is located right above the edge area of the open area, and the edge of the transition area 22 is flush with the edge of the open area, that is, the front projection of the transition area 22 on the screen 10 coincides with the outer edge of the front projection of the open area on the screen 10.
It should be noted that the transition region 22 may also be opposite to a portion of the open area and a portion of the non-open area adjacent to the open area. That is, the transition region 22 is opposite to other regions outside the central region of the open region and to a portion of the non-open region, so that the edge of the region of the second film layer 20 with gradually-changed transmittance is outside the edge of the open region of the first film layer 30, thereby improving the transition effect of the second film layer 20 on the light intensity.
The transmittance of the transition region 22 is a range of values, specifically, the transmittance of the transition region 22 is less than or equal to the transmittance of the light-transmitting region 21, and the transmittance of the transition region 22 gradually decreases in a direction away from the light-transmitting region 21. It will be appreciated that the closer to the central region of the open area, the higher the transmittance of the transition region 22, and the farther from the central region of the open area, the lower the transmittance of the transition region 22.
Along the direction from the edge of the open area to the center of the open area, the transmittance of the portion of the second film layer 20 corresponding to the open area is gradually increased, so that after light passes through the second film layer 20, the illumination intensity received by the screen body 10 is gradually increased from the area corresponding to the non-open area to the area corresponding to the open area, the illumination intensity received by the corresponding area in the TFT array layer in the screen body 10 is also gradually increased, that is, the characteristic difference of each area of the TFT array layer is gradually changed, thereby the light emitting characteristic of the OLED layer is also gradually changed, the display difference and the obvious boundary of the chromaticity, the brightness non-uniformity and the like of the screen body 10 are reduced or eliminated, and the display effect of the display device is improved.
Illustratively, the transmittance of the portion of the transition region 22 in contact with the light-transmitting region 21 is the same as that of the light-transmitting region 21, so that no abrupt change in transmittance occurs at the interface between the light-transmitting region 21 and the transition region 22. Along the direction away from the light-transmitting area 21, the transmittance of the transition area 22 may be linearly reduced, so that the intensity of the light passing through the second film layer 20 gradually changes, and the intensity of the illumination received by each area in the screen body 10 gradually changes. Wherein the light transmittance of the edge portion of the transition region 22 remote from the light transmitting region 21 may be zero, i.e. the portion is completely opaque.
Referring to fig. 3, the second film layer 20 may further include an opaque region 23, for example, the region of the second film layer 20 excluding the light-transmitting region 21 and the transition region 22 is the opaque region 23, i.e., the second film layer 20 is divided into the opaque region 23, the transition region 22, and the light-transmitting region 21. The opaque region 23 can prevent light from being scattered or obliquely irradiated onto the screen body 10 from outside the edge of the transition region 22 when the light is incident into the second film layer 20 from the opening region, thereby causing poor display of the screen body 10.
The light-transmitting region 21, the transition region 22 and the light-impermeable region 23 may be contiguous in sequence, i.e. the transition region 22 is located between the light-transmitting region 21 and the light-impermeable region 23, and the light-impermeable region 23 may be disposed around the transition region 22. Namely, a transition area 22 is sleeved outside the light transmission area 23, and an opaque area 23 is sleeved outside the transition area 22. So set up, along keeping away from the center of printing opacity district 21, transition district 22 and the light-tight district 23 transition in proper order, and the circumference of printing opacity district 21 all is provided with transition district 22, and the transmissivity transitional effect of second rete 20 is better.
The opaque region 23 may be completely opaque, i.e., the transmittance of the opaque region 23 may be zero; the opaque region 23 may also be not completely opaque, i.e., the transmittance of the opaque region 23 may not be zero. In the embodiment of the present invention, the transmittance of the opaque region 23 may be less than or equal to the transmittance of the transition region 22, so that the transmittance of the opaque region 23 and the transmittance of the transition region 22 are sequentially reduced, the transmittance of the transparent region 21, the transmittance of the transition region 22 and the transmittance of the opaque region 23 are gradually transited, and the transmittance of the whole second film layer 20 is smoothly transited. When light enters the hole area, the light-tight area 23 can further smooth the light intensity difference passing through the second film layer 20, so as to improve the display effect.
Illustratively, the transmittance of the area of the transition region 22 contacting the light-transmitting region 21 is equal to the transmittance of the light-transmitting region 21, the transmittance of the area of the transition region 22 contacting the light-impermeable region 23 is equal to the transmittance of the light-impermeable region 23, and the transmittance of the transition region 22 gradually decreases along the light-transmitting region 21 to the light-impermeable region 23.
In some possible examples, referring to fig. 4, the second film layer includes a support layer 50, the support layer 50 being for supporting the screen body 10, the support layer 50 including the light-transmitting region 21 and the transition region 22 described above.
In the embodiment of the present invention, the supporting layer 50 further includes the above-mentioned opaque region 23, as shown in fig. 4, a transition region 22 is disposed outside the transparent region 21 of the supporting layer 50, and the opaque region 23 is disposed outside the transition region 22 of the supporting layer 50, so that the transmittance of the supporting layer 50 on the whole plane opposite to the screen body 10 gradually changes.
The light-transmitting region 21 of the supporting layer 50 has a higher transmittance, for example, the transmittance of the light-transmitting region 21 is greater than 80%. The transmittance of the transition region 22 of the support layer 50 gradually changes, and for example, the material of the support layer 50 may be polyethylene terephthalate (polyethylene glycol terephthalate, abbreviated as PET) material, i.e., the support layer 50 is PET material. A material with varying transmittance, such as black ink, is coated on the surface of the transition region 22 to vary the transmittance of the transition region 22. Or the transition region 22 is doped with opaque particles, and the transmittance of the transition region 22 is changed by adjusting the content of the opaque particles.
With continued reference to fig. 4, the first film layer 30 includes an adhesive layer 60, a buffer layer 70, a thermal insulation layer 80, and a metal layer 90, where the adhesive layer 60, the buffer layer 70, the thermal insulation layer 80, and the metal layer 90 are stacked, and the metal layer 90 is close to the fingerprint recognition module 40, i.e. the metal layer 90 is located at one end of the first film layer 30 close to the fingerprint recognition module 40. In the orientation shown in fig. 4, the adhesive layer 60, the buffer layer 70, the thermal insulation layer 80 and the metal layer 90 are disposed from bottom to top, and the fingerprint recognition module 40 is located below the metal layer 90.
The adhesive layer 60 is used for bonding the first film layer 30 and the second film layer 20, and the material of the adhesive layer 60 may be an optical clear adhesive (Optically CLEAR ADHESIVE, abbreviated as OCA), a greenhouse vulcanized silicone rubber (Room Temperature Vulcanized Silicone Rubber, abbreviated as RTV), or a grid adhesive.
In the embodiment of the present invention, the adhesive layer 60 is a mesh adhesive, which may be formed by curing acrylate with higher viscosity, and the mesh adhesive has a mesh pattern, for example, the mesh adhesive has a diamond pattern, a square pattern, or a trapezoid pattern.
The buffer layer 70 serves to buffer and reduce the possibility of damage when the display device is dropped. The material of the buffer layer 70 may be foam, rubber, or the like. The heat insulating layer 80 is used for heat insulation, and the material of the heat insulating layer 80 may be Polyimide (PI). The metal layer 90 plays a shielding role to reduce interference of external signals to the display device, and the metal layer 90 may be made of copper.
With continued reference to fig. 4, the bonding layer 60 is provided with a first through hole, the buffer layer 70 is provided with a second through hole, the insulating layer 80 is provided with a third through hole, and the metal layer 90 is provided with a fourth through hole. The first through hole, the second through hole, the third through hole and the fourth through hole are sequentially communicated to form an open pore area of the first film layer 30, namely, the open pore area penetrates through the bonding layer 60, the buffer layer 70, the heat insulation layer 80 and the metal layer 90 so that light can pass through, and the fingerprint recognition module 40 can recognize fingerprints.
The opening shapes and opening sizes of the first through hole, the second through hole, the third through hole and the fourth through hole may be the same, and the center lines of the four through holes coincide. On the one hand, the four through holes can be formed at one time to reduce processing steps, and on the other hand, the fingerprint identification module 40 is convenient for receiving light.
The non-perforated area of the first film layer 30 is generally opaque to ensure that the fingerprint recognition module 40 can work properly. Illustratively, the end of the tie layer 60 remote from the second film layer 20 may be light-blocked by coating with black graphite to render the layer completely opaque, thereby rendering the non-perforated areas of the first film layer 30 completely opaque. Alternatively, the buffer layer 70 is made of a completely opaque material, so that the non-perforated area of the first film layer 30 is completely opaque.
It should be noted that, when the second film layer 20 is provided with the opaque region 23 and the opaque region 23 is completely opaque, the non-perforated region of the first film layer 30 may be transparent or opaque. Fingerprint recognition by the fingerprint recognition module 40 can be realized through the opaque region 23 of the second film layer 20. When the second film layer 20 is provided with the opaque region 23, the opaque region 23 is not completely opaque, or when the second film layer 20 is not provided with the opaque region 23, the non-open area of the first film layer 30 can be completely opaque, so as to ensure that the fingerprint recognition module 40 can perform fingerprint recognition.
In other possible examples, referring to fig. 5, the second film layer 20 includes a support layer 50 and an adhesive layer 60 that are stacked, with the support layer 50 being adjacent to the screen 10, i.e., the support layer 50 is located at an end of the second film layer 20 adjacent to the screen 10. As shown in fig. 5, the adhesive layer 60, the support layer 50, and the screen body 10 are laminated in this order from bottom to top.
The supporting layer 50 supports the screen body 10, and the supporting layer 50 is made of a light-transmitting material, for example, the supporting layer 50 may be a PET layer, and the transmittance of the PET layer is greater than 80%. The adhesive layer 60 bonds the support layer 50 and the buffer layer 70, and the adhesive layer 60 may be a mesh adhesive layer or other adhesive layer with higher transmittance.
The adhesive layer 60 includes the light transmitting region 21 and the transition region 22 described above. In the embodiment of the present invention, the bonding layer 60 further includes the above-mentioned opaque region 23, as shown in fig. 5, the transition region 22 is disposed around the transparent region 21 of the bonding layer 60, and the opaque region 23 is disposed around the transition region 22 of the bonding layer 60, so that the overall transmittance of the bonding layer 60 gradually changes.
With continued reference to fig. 5, the first film layer 30 includes a buffer layer 70, a heat insulating layer 80 and a metal layer 90 that are stacked, where the metal layer 90 is close to the fingerprint recognition module 40, i.e. the metal layer 90 is located at one end of the first film layer 30 close to the fingerprint recognition module 40. As shown in fig. 5, the metal layer 90, the heat insulating layer 80, the buffer layer 70, the adhesive layer 60, and the support layer 50 are disposed from bottom to top, constituting an intermediate layer. The buffer layer 70 may be a foam layer, the heat insulating layer 80 may be a PI layer, and the metal layer 90 may be a copper foil layer.
The buffer layer 70 is provided with a fifth through hole, the heat insulating layer 80 is provided with a sixth through hole, the metal layer 90 is provided with a seventh through hole, and the fifth through hole, the sixth through hole and the seventh through hole are sequentially communicated to form an open hole area of the first film layer 30, that is, the open hole area penetrates through the buffer layer 70, the heat insulating layer 80 and the metal layer 90. The center lines of the fifth through hole, the sixth through hole and the seventh through hole may coincide, and the opening shapes and the opening sizes of the fifth through hole, the sixth through hole and the seventh through hole may be the same. The fifth through hole, the sixth through hole and the seventh through hole may be disposed with reference to the first through hole, the second through hole, the third through hole and the fourth through hole, which are not described herein.
In the embodiment of the invention, the display device comprises a screen body 10, a fingerprint identification module 40 and an intermediate layer, wherein the intermediate layer is positioned between the screen body 10 and the fingerprint identification module 40 and comprises a first film layer 30 close to the fingerprint identification module 40 and a second film layer 20 close to the screen body 10, and the second film layer 20 is positioned on the first film layer 30; the first film layer 30 comprises an open area and a non-open area, the open area corresponds to the fingerprint identification module 40, the second film layer 20 comprises a transition area 22 and a light-transmitting area 21, and the transition area 22 is arranged around the light-transmitting area 21; the light-transmitting area 21 is opposite to the central area of the open area to ensure that the open area can receive light; the transition region 22 is opposite to other regions outside the center region of the open hole region and part of the non-open hole region, the transmittance of the transition region 22 is smaller than or equal to the transmittance of the light transmission region 21, and the transmittance of the transition region 22 gradually decreases along the direction away from the light transmission region 21, so that the transmittance between the light transmission region 21 and the transition region 22 gradually transits; after the light passes through the second film layer 20, the intensity of the light received by the screen body 10 gradually decreases from the area corresponding to the open area to the area corresponding to the non-open area, that is, the intensity of the light received by each area in the screen body 10 gradually changes, so that the characteristic difference caused by the light of each area in the screen body 10 also gradually decreases, and the brightness of the screen body 10 corresponding to the open area to the non-open area gradually changes during display, so that the display difference and obvious boundary of the chromaticity, the brightness non-uniformity and the like of the screen body 10 can be reduced or eliminated, and the display effect of the display device is further improved.
In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the system or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.
In the description of the present specification, reference is made to "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular instance," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The display device is characterized by comprising a screen body, a fingerprint identification module and an intermediate layer positioned between the screen body and the fingerprint identification module;
The middle layer comprises a first film layer close to the fingerprint identification module and a second film layer which is positioned on the first film layer and close to the screen body, the first film layer comprises an open pore area and a non-open pore area, and the open pore area is opposite to the fingerprint identification module;
The second film layer comprises a light-transmitting area and a transition area surrounding the light-transmitting area, the cross-sectional area of the light-transmitting area is smaller than that of the open-pore area, the light-transmitting area is opposite to the central area of the open-pore area, the central line of the light-transmitting area coincides with the central line of the open-pore area, and the transition area is opposite to other areas outside the central area of the open-pore area and part of the non-open-pore area;
the transmittance of the transition region is smaller than or equal to that of the light-transmitting region, and gradually decreases along the direction away from the light-transmitting region;
The transmittance of the part of the transition region, which is contacted with the light transmission region, is the same as that of the light transmission region, and the transmittance of the edge part of the transition region, which is far away from the light transmission region, is zero;
and the transmittance of the transition region linearly decreases along the direction away from the light transmission region.
2. The display device of claim 1, wherein the second film layer comprises a support layer comprising the transition region and the light-transmissive region.
3. The display device according to claim 2, wherein the first film layer includes an adhesive layer, a buffer layer, a heat insulating layer, and a metal layer that are stacked, the metal layer being adjacent to the fingerprint recognition module;
The open pore area penetrates through the bonding layer, the buffer layer, the heat insulation layer and the metal layer.
4. The display device according to claim 1, wherein the second film layer includes a support layer and an adhesive layer which are stacked, the support layer is made of a light-transmitting material, and the support layer is close to the screen body;
the adhesive layer includes the transition region and the light-transmitting region.
5. The display device of claim 4, wherein the first film layer comprises a buffer layer, a heat insulating layer and a metal layer which are stacked, and the metal layer is close to the fingerprint recognition module;
The open pore area penetrates through the buffer layer, the heat insulation layer and the metal layer.
6. The display device of any one of claims 1-5, wherein the second film layer further comprises an opaque region disposed around the transition region, and wherein the opaque region has a transmittance less than or equal to a transmittance of the transition region.
7. A display device according to any one of claims 1 to 5, wherein the cross-sectional shape of the light-transmitting region is circular, elliptical, square or other regular polygon, and the cross-sectional shape of the transition region is annular, with a plane parallel to the screen body being a cross-section.
8. The display device according to any one of claims 1 to 5, wherein transmittance of the light transmitting region is the same along a direction from a center of the light transmitting region to an edge of the light transmitting region.
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| CN113095245A (en) * | 2021-04-19 | 2021-07-09 | 业泓科技(成都)有限公司 | Touch display module and fingerprint identification module under screen thereof |
| CN113594225B (en) * | 2021-08-11 | 2023-06-30 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN113986037B (en) * | 2021-10-19 | 2023-08-25 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
| CN114986998A (en) * | 2022-05-25 | 2022-09-02 | 福耀玻璃工业集团股份有限公司 | Laminated glass, windshield assembly and vehicle |
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