CN215771152U - Display structure with increased light transmittance and electronic equipment - Google Patents
Display structure with increased light transmittance and electronic equipment Download PDFInfo
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- CN215771152U CN215771152U CN202121605030.7U CN202121605030U CN215771152U CN 215771152 U CN215771152 U CN 215771152U CN 202121605030 U CN202121605030 U CN 202121605030U CN 215771152 U CN215771152 U CN 215771152U
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Abstract
The application discloses display structure and electronic equipment that light transmittance increases includes: the light-emitting pixel layer consists of a light-emitting pixel layer of a general display area and a light-emitting pixel layer of a biological characteristic identification area, the light-emitting pixel array of the general display area forms the light-emitting pixel layer of the general display area, and the light-emitting pixel array of the biological characteristic identification area forms the light-emitting pixel layer of the biological characteristic identification area; the driving layer consists of a driving layer of a general display area and a driving layer of a biological characteristic identification area; the density of the light emitting pixel array of the biometric identification area is less than the density of the light emitting pixel array of the general display area. The application can promote the light transmittance of the biological identification area of the highlight display OLED screen without the polaroid structure, meet the light intensity requirement of the optical biological characteristic identification module under the screen, and obtain a high-quality biological characteristic image.
Description
Technical Field
The application belongs to the display field, and particularly relates to a display structure with increased light transmittance and an electronic device.
Background
The full-screen mobile phone becomes the mainstream of mobile equipment development, the optical identification technology is widely applied to the full-screen mobile equipment, the OLED screen also becomes the main supply screen of the mobile equipment, the method of adding a polaroid is adopted to prevent the interference display of external environment light in the manufacturing process of the OLED screen at present, but the brightness of the screen is reduced by about 50%, the current needs to be increased to achieve a brighter display effect, and the service life of the screen is greatly shortened by large current.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks, in one aspect, the present application provides a display structure with increased light transmittance, in which the density of light-emitting pixels in a general display area of the display structure is different from that in a biometric identification area, and the density of light-emitting pixels in the biometric identification area is less than that in the general display area.
A display structure with increased light transmission comprising:
the light-emitting pixel layer consists of a light-emitting pixel layer of a general display area and a light-emitting pixel layer of a biological characteristic identification area, the light-emitting pixel array of the general display area forms the light-emitting pixel layer of the general display area, and the light-emitting pixel array of the biological characteristic identification area forms the light-emitting pixel layer of the biological characteristic identification area;
the driving layer consists of a driving layer of a general display area and a driving layer of a biological characteristic identification area;
the density of the light emitting pixel array of the biometric identification area is less than the density of the light emitting pixel array of the general display area.
Optionally, the display structure with increased light transmittance further includes a black material light absorption layer, a light channel allowing light to pass through is disposed on the black material light absorption layer, the black material light absorption layer is composed of the black material light absorption layer in the general display area and the black material light absorption layer in the biological feature recognition area, and the light channel is composed of the light channel in the general display area and the light channel in the biological feature recognition area.
Optionally, a filter element is disposed in the light channel of the black material light absorption layer, and the filter element is composed of a filter element array in the general display area and a filter element array in the biometric identification area.
Optionally, the driving layer of the general display area includes a driving module of the general display area, the driving layer of the biometric identification area includes a driving module of the biometric identification area, and the light-emitting pixel array of the general display area and the light-emitting pixel array of the biometric identification area are respectively driven by the driving module of the general display area and the driving module of the biometric identification area.
Optionally, the current supplied by the circuit of the light emitting pixel array of the biometric identification area is greater than the current supplied by the light emitting pixel array of the general display area, and during biometric identification, the driving circuit of the biometric identification area controls the light emitting pixels to modulate and emit light in a wavelength range required by biometric identification.
Optionally, the display structure with increased light transmittance further comprises a glass cover plate and/or an encapsulation layer and/or an optical glue layer and/or a transmission layer; the glass cover plate consists of a glass cover plate in a general display area and a glass cover plate in a biological characteristic identification area; the packaging layer consists of a packaging layer of a general display area and a packaging layer of a biological characteristic identification area; the optical adhesive layer consists of an optical adhesive layer in a general display area and an optical adhesive layer in a biological characteristic identification area; the transmission layer is composed of a transmission layer of the general display area and a transmission layer of the biological characteristic identification area.
Optionally, the size a of the biological feature recognition area of the display structure is matched with the structural size B of the optical feature recognition module under the screen, wherein a is larger than or equal to B.
Under the state that does not set up the polaroid, luminous pixel through general display area and biological characteristic identification area's density is different, and the luminous pixel's of biological characteristic identification area density is less than the luminous pixel's of general display area density, the metal cathode quantity that corresponds reduces, the regional area that is in the light of biological characteristic identification diminishes, the light shielding ability that reflects back to the organism weakens, the corresponding reflection light that this region passed the screen increases, the light transmittance in this region has been promoted, the acquisition of the optical biological characteristic identification module under the screen is more biological information light. And the black material light absorption layer absorbs and blocks ambient light, so that the cathode reflection is prevented from reducing the display contrast.
On the other hand, the application also provides an electronic device.
An electronic device is characterized by comprising the display structure.
Compared with the prior art, the beneficial effect of this application lies in:
the technical scheme of this application not only can the hi-lite display effect of OLED screen, can promote the light transmittance that does not have the biological identification region of the hi-lite display OLED screen of polaroid structure moreover, satisfies the light intensity demand of optical biological characteristic identification module under the screen, obtains high quality biological characteristic image.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of different distributions of light-emitting pixels in a general display area and a biological feature recognition area of an OLED screen;
FIG. 2 is a sectional schematic view (along the section of FIG. 1A-A) of OLED screen with different light emitting pixel distribution in the general display area and the biological characteristic identification area;
FIG. 3 is a schematic diagram showing the same distribution of light-emitting pixels in the general display area and the biometric identification area of an OLED screen;
FIG. 4 is a cross-sectional schematic view (along the cross-section of FIG. 3B-B) showing the same distribution of light-emitting pixels in the general display area and the biometric identification area of the OLED screen;
FIG. 5 is a schematic diagram showing that the general display area and the biometric identification area of the OLED screen have different light-emitting pixel distributions;
FIG. 6 is a sectional schematic view (along the section of FIGS. 5C-C) showing that the general display area and the biometric feature recognition area of the OLED screen have different light-emitting pixel distribution;
FIG. 7 is a schematic view of an antireflective film layer with M > 2;
FIG. 8 is a schematic diagram of a control circuit for driving OLED display with different light-emitting pixel distribution in the general display area and the biometric identification area;
FIG. 9 is a schematic diagram showing that the general display area and the biometric identification area of the OLED screen have different light-emitting pixel distributions;
FIG. 10 is a cross-sectional view (taken along FIG. 9D-D) of a general display area and a biometric identification area of an OLED screen with different light-emitting pixel distributions;
FIG. 11 is a schematic diagram showing that the general display area and the biometric identification area of the OLED screen have different light-emitting pixel distributions;
fig. 12 is a cross-sectional view (along fig. 11E-E) of the general display area and the biometric identification area of the OLED screen showing different light-emitting pixel distributions.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solution of the present application will be described in detail below with specific examples. The following embodiments may be combined with each other and may not be described in detail in some embodiments for the same or similar concepts or processes.
As a common application scenario, the display screen provided in the embodiment of the present application may be applied to a smart phone, a tablet computer, and other mobile terminals or other terminal devices having the display screen, and the technical scheme of the embodiment of the present application may be used in a biometric identification technology.
Referring to fig. 1, fig. 1 is a schematic diagram showing the difference between the distribution of light emitting pixels in the general display area and the biological feature recognition area of the OLED screen, and fig. 2 is a schematic diagram showing the difference between the distribution of light emitting pixels in the general display area and the biological feature recognition area of the OLED screen (taken along fig. 1A-a).
In the display structure of fig. 1, the display area is composed of a general display area 100 and a biometric identification area 200, the light-emitting pixel array 101 of the general display area is disposed in the general display area 100, and the light-emitting pixel array 201 of the biometric identification area is disposed in the biometric identification area 200.
The display structure of fig. 2 includes a driving layer and a light-emitting pixel layer located above the driving layer, the light-emitting pixel layer can be driven by the driving layer to emit light, the driving layer is composed of a driving layer 107 of a general display region and a driving layer 207 of a biometric feature recognition region, the light-emitting pixel layer is composed of a light-emitting pixel layer of the general display region and a light-emitting pixel layer of the biometric feature recognition region, a light-emitting pixel array 101 of the general display region is composed of a light-emitting pixel layer of the general display region, and a light-emitting pixel array 201 of the biometric feature recognition region is composed of a light-emitting pixel layer of the biometric feature recognition region.
In one or more specific embodiments of the present application, the display structure further includes a filter element, and the filter element only allows light of a specific wavelength to pass through, thereby achieving a filtering effect. The filter elements are comprised of an array of filter elements 106 for the general display area and an array of filter elements 206 for the biometric identification area.
In one or more specific embodiments of the present application, the light emitting pixel array 101 of the general display area may include a light emitting pixel 101a of the general display area, a light emitting pixel 101b of the general display area, and a light emitting pixel 101c of the general display area, and the light emitting pixel array 101 and the corresponding RGB filter element 106 in combination emit corresponding color light, wherein the light emitting pixel 101a of the general display area and the R filter element generate light of a red wavelength band; the pixels 101b and the G filter elements in the general display area generate green band light; the pixels 101c and the B filter elements in the general display area generate light in the blue wavelength band.
In one or more specific embodiments of the present application, the light-emitting pixel array 201 of the biometric identification area may include a light-emitting pixel array 201a of the biometric identification area, a light-emitting pixel array 201b of the biometric identification area, and a light-emitting pixel array 201c of the biometric identification area, the light-emitting pixel array 201 and the corresponding RGB filter element 206 emitting light of corresponding colors in combination, wherein the light-emitting pixel array 201a of the biometric identification area and the R filter element generate light of red wavelength band; the light-emitting pixel array 201b and the G filter element in the biological characteristic identification area generate green-band light; the light emitting pixel array 201c and the B filter element of the biometric identification area generate light in the blue wavelength band.
In one or more specific embodiments of the present application, the display structure further comprises a glass cover plate positioned above the black material light absorbing layer (BM), the glass cover plate being composed of the glass cover plate 102 of the general display area and the glass cover plate 202 of the biometric identification area.
In one or more specific embodiments of the present application, the display structure further includes an optical cement layer (OCA) between the glass cover plate and the black material light absorption layer (BM), the optical cement layer being composed of the optical cement layer 103 of the general display region and the optical cement layer 203 of the biometric recognition region.
In one or more specific embodiments herein, the display structure further includes a TFE encapsulation layer, which is comprised of the TFE encapsulation layer 104 of the general display region and the encapsulation layer 204 of the biometric identification region.
In one or more specific embodiments of the present application, the display structure further comprises a transmission layer, which is composed of the transmission layer 105 of the general display area and the transmission layer 205 of the biometric identification area.
The density of the light emitting pixel array 201 of the biometric identification area of fig. 1 is less than the density of the light emitting pixel array 101 of the general display area. When the density of the luminous pixel array 201 of the biological feature recognition area is smaller than that of the luminous pixel array 101 of the general display area, the number of corresponding metal cathodes is reduced, the area of the light blocking area of the biological feature recognition area 200 is reduced, the shielding capability of light reflected back by an organism is weakened, the number of corresponding reflected light rays passing through the screen in the area is increased, the light transmittance of the area is improved, and more biological information light rays are obtained by the optical biological feature recognition module under the screen.
The density of the light-emitting pixel array 201 of the biometric identification region is smaller than the density of the light-emitting pixel array 101 of the general display region, which means that the number of light-emitting pixels included in the light-emitting pixel array 201 of the biometric identification region is smaller than the number of light-emitting pixels of the light-emitting pixel array 101 of the general display region within the same area.
Referring to fig. 3 and 4, fig. 3 is a schematic diagram showing that the distribution of the light emitting pixels of the general display area and the biometric identification area of the OLED screen are the same, and fig. 4 is a schematic diagram showing that the distribution of the light emitting pixels of the general display area and the biometric identification area of the OLED screen are the same (cut along fig. 3B-B).
The display area of fig. 3 is composed of a screen general display area 100 and a biometric identification area 200, wherein the light-emitting pixel array 101 of the general display area is arranged in the general display area 100, and the light-emitting pixel array 201 of the biometric identification area is arranged in the biometric identification area 200.
The display structure of fig. 4 includes a driving layer and a light-emitting pixel layer located above the driving layer, the light-emitting pixel layer can be driven by the driving layer to emit light, the driving layer is composed of a driving layer 107 of a general display region and a driving layer 207 of a biometric feature recognition region, the light-emitting pixel layer is composed of a light-emitting pixel layer of the general display region and a light-emitting pixel layer of the biometric feature recognition region, a light-emitting pixel array 101 of the general display region is composed of a light-emitting pixel layer of the general display region, and a light-emitting pixel array 201 of the biometric feature recognition region is composed of a light-emitting pixel layer of the biometric feature recognition region.
In one or more specific embodiments of the present application, the light emitting pixel array 101 of the general display area may include a light emitting pixel 101a of the general display area, a light emitting pixel 101b of the general display area, and a light emitting pixel 101c of the general display area, and the light emitting pixel array 101 and the corresponding RGB filter element 106 in combination emit corresponding color light, wherein the light emitting pixel 101a of the general display area and the R filter element generate light of a red wavelength band; the pixels 101b and the G filter elements in the general display area generate green band light; the pixels 101c and the B filter elements in the general display area generate light in the blue wavelength band.
In one or more specific embodiments of the present application, the light-emitting pixel array 201 of the biometric identification area may include a light-emitting pixel array 201a of the biometric identification area, a light-emitting pixel array 201b of the biometric identification area, and a light-emitting pixel array 201c of the biometric identification area, the light-emitting pixel array 201 and the corresponding RGB filter element 206 emitting light of corresponding colors in combination, wherein the light-emitting pixel array 201a of the biometric identification area and the R filter element generate light of red wavelength band; the light-emitting pixel array 201b and the G filter element in the biological characteristic identification area generate green-band light; the light emitting pixel array 201c and the B filter element of the biometric identification area generate light in the blue wavelength band.
The display structure of fig. 4 further includes a black material light absorption layer, which is composed of the black material light absorption layer 108 of the general display area and the black material light absorption layer 208 of the biometric identification area, and is located above the light emitting pixel layer, and in order to prevent the black material light absorption layer from absorbing light required for use, a light passage (for example, a through hole may be formed) for allowing light to pass therethrough is provided on the black material light absorption layer, and the light passage is composed of the light passage of the general display area and the light passage of the biometric identification area. The black material light absorption layer reduces the reflection of external environment light, improves the display contrast under sunlight, and can prevent the interference of the external environment light without a polaroid after the display structure is provided with the black material light absorption layer with a light channel.
In one or more specific embodiments herein, the black material light absorbing layer may be a black glue light absorbing layer.
In one or more specific embodiments of the present application, a filter element is disposed in the light channel of the black material light absorption layer, and the filter element only allows light with a specific wavelength to pass through, so as to achieve a filtering effect. The filter elements are comprised of an array of filter elements 106 for the general display area and an array of filter elements 206 for the biometric identification area.
In one or more specific embodiments of the present application, the display structure further comprises a glass cover plate positioned over the light absorbing layer of black material, the glass cover plate being comprised of the glass cover plate 102 of the general display area and the glass cover plate 202 of the biometric identification area.
In one or more specific embodiments of the present application, the display structure further includes an optical adhesive layer (OCA) between the glass cover plate and the black material light absorption layer, the optical adhesive layer being composed of the optical adhesive layer 103 of the general display area and the optical adhesive layer 203 of the biometric identification area.
In one or more specific embodiments herein, the display structure further includes a TFE encapsulation layer, which is comprised of the TFE encapsulation layer 104 of the general display region and the encapsulation layer 204 of the biometric identification region.
In one or more specific embodiments of the present application, the display structure further comprises a transmission layer, which is composed of the transmission layer 105 of the general display area and the transmission layer 205 of the biometric identification area.
The density of the light emitting pixel array 201 of the biometric identification area of fig. 3 is not different from the density of the light emitting pixel array 101 of the general display area.
The display structure of fig. 3 and 4 is to respond to the poor display contrast caused by the reflection of the metal electrode in the screen by the external environment light, and the display contrast under the sunlight is improved and the reflection of the external environment light is reduced by arranging the black material light absorption layer with the light channel, so that the reflection of the external environment light can be eliminated without arranging a polarizing film. However, the self-luminous line of the display structure shown in fig. 3 and 4 is also partially absorbed by the black material, the screen transmittance is low, the light information reaching the optical biometric identification device under the screen is less, the application is limited, the identification effect and the user experience are relatively poor, the light-emitting pixel density of the two functional areas is the same, although the high-brightness display requirement can be met, the screen transmittance is relatively low (1.5% -2%), and more information light rays are needed to transmit the screen when the optical biometric identification module under the screen obtains the high-quality biometric image, that is: and the transmittance of the biological feature recognition area of the OLED screen is improved.
Referring to fig. 5-8, fig. 5 is a schematic diagram showing that the distribution of light-emitting pixels in the general display area and the biological feature recognition area of the OLED screen is different, fig. 6 is a schematic diagram of a cross-section (cross-section along fig. 5C-C) showing that the distribution of light-emitting pixels in the general display area and the biological feature recognition area of the OLED screen is different, fig. 7 is a schematic diagram of an anti-reflection film layer with M >2, and fig. 8 is a schematic diagram of a control circuit for controlling the light-emitting pixels in the general display area and the biological feature recognition area of the OLED screen to be different.
The display area of fig. 5 is composed of a screen general display area 100 and a biometric identification area 200, wherein the light-emitting pixel array 101 of the general display area is arranged in the general display area 100, and the light-emitting pixel array 201 of the biometric identification area is arranged in the biometric identification area 200.
The display structure of fig. 6 includes a driving layer and a light-emitting pixel layer located above the driving layer, the light-emitting pixel layer can be driven by the driving layer to emit light, the driving layer is composed of a driving layer 107 of a general display region and a driving layer 207 of a biometric feature recognition region, the light-emitting pixel layer is composed of a light-emitting pixel layer of the general display region and a light-emitting pixel layer of the biometric feature recognition region, a light-emitting pixel array 101 of the general display region is composed of a light-emitting pixel layer of the general display region, and a light-emitting pixel array 201 of the biometric feature recognition region is composed of a light-emitting pixel layer of the biometric feature recognition region.
In one or more specific embodiments of the present application, the light emitting pixel array 101 of the general display area may include a light emitting pixel 101a of the general display area, a light emitting pixel 101b of the general display area, and a light emitting pixel 101c of the general display area, and the light emitting pixel array 101 and the corresponding RGB filter element 106 in combination emit corresponding color light, wherein the light emitting pixel 101a of the general display area and the R filter element generate light of a red wavelength band; the pixels 101b and the G filter elements in the general display area generate green band light; the pixels 101c and the B filter elements in the general display area generate light in the blue wavelength band.
In one or more specific embodiments of the present application, the light-emitting pixel array 201 of the biometric identification area may include a light-emitting pixel array 201a of the biometric identification area, a light-emitting pixel array 201b of the biometric identification area, and a light-emitting pixel array 201c of the biometric identification area, the light-emitting pixel array 201 and the corresponding RGB filter element 206 emitting light of corresponding colors in combination, wherein the light-emitting pixel array 201a of the biometric identification area and the R filter element generate light of red wavelength band; the light-emitting pixel array 201b and the G filter element in the biological characteristic identification area generate green-band light; the light emitting pixel array 201c and the B filter element of the biometric identification area generate light in the blue wavelength band.
The display structure of fig. 6 further includes a black material light absorption layer, which is composed of the black material light absorption layer 108 of the general display area and the black material light absorption layer 208 of the biometric identification area, and is located above the light emitting pixel layer, and in order to prevent the black material light absorption layer from absorbing light required for use, a light passage (for example, a through hole may be formed) for allowing light to pass therethrough is provided on the black material light absorption layer, and the light passage is composed of the light passage of the general display area and the light passage of the biometric identification area. The black material light absorption layer reduces the reflection of external environment light, improves the display contrast under sunlight, and can prevent the interference of the external environment light without a polaroid after the display structure is provided with the black material light absorption layer with a light channel.
In one or more specific embodiments herein, the black material light absorbing layer may be a black glue light absorbing layer.
In one or more specific embodiments of the present application, a filter element is disposed in the light channel of the black material light absorption layer, and the filter element only allows light with a specific wavelength to pass through, so as to achieve a filtering effect. The filter elements are comprised of an array of filter elements 106 for the general display area and an array of filter elements 206 for the biometric identification area.
In one or more specific embodiments of the present application, the display structure further comprises a glass cover plate positioned over the light absorbing layer of black material, the glass cover plate being comprised of the glass cover plate 102 of the general display area and the glass cover plate 202 of the biometric identification area.
In one or more specific embodiments of the present application, the density of the light-emitting pixel array 201 of the biometric identification area of fig. 5 is less than the density of the light-emitting pixel array 101 of the general display area, when the density of the light-emitting pixel array 201 of the biometric identification area is less than the density of the light-emitting pixel array 101 of the general display area, the number of corresponding metal cathodes is reduced, the area of the light-blocking area of the biometric identification area 200 is reduced, the light blocking capability for the light reflected back by the living body is weakened, the corresponding reflected light of the area passing through the screen is increased, the light transmittance of the area is improved, and the optical biometric identification module under the screen obtains more biometric information light.
In one or more embodiments of the present disclosure, the display structure further includes an anti-reflection film layer 209 for increasing the transmittance of the light reflected from the biometric identification area.
In one or more specific embodiments of the present disclosure, the antireflection film layer 209 is disposed between the glass cover plate 202 of the biometric identification area and the optical adhesive layer 203 of the biometric identification area, and the number of layers M of the antireflection film layer 309 is greater than or equal to 1(M is an integer greater than 1), and the number of layers is designed according to the transmittance of the biometric identification area of the screen.
In one or more specific embodiments of the present application, the material of antireflective film layer 209 has a refractive index niRelated to the number M of the plated film layers, when the anti-reflection film layer 2 is not less than M and not less than 0, the method
Film system model design, lambda is the central wavelength of the anti-reflection of the film layer, and the refractive index n used by the film system model designiRefractive index n greater than the glass cover plate0(in general n)01.5) and less than the refractive index n of the optical cement layer (OCA)OCAWherein, when M is 1, nOCA＞n1＞n0(ii) a When M is 2, nOCA＞n2＞n1＞n0。
When the antireflection film layer M is more than 2, that is, when the antireflection film layer has three or more layers, as shown in FIG. 7, a film having a thickness of less than 2 is used
Multilayer model structure, namely: the optical thickness of a layer (i.e., the Mm layer) adjacent to the glass cover plate 202 of the biometric identification area is satisfied
(partially reflective film), a layer adjacent to the optical glue layer 203 of the biometric identification area (i.e., M)1Layer) optical thickness of
(partially reflective film), M1The optical glue layer 203 of the layer and the biometric identification area is considered as a half mirror, M2-m-1Is a spacer layer having an optical thickness of
(the interface defined by the spacer layer acts as the effective interface).
The thickness and the refractive index of the Mm layer satisfy the formula:
M2-m-1the layer thickness and the refractive index satisfy the formula:
M1the layer thickness and the refractive index satisfy the formula:
wherein n is1、n2And n3Respectively correspond to M1Refractive index of layer Material, M2-m-1Refractive index of layer material and refractive index of Mm layer material, d1、d2And d3Respectively correspond to M1Layer thickness, M2-m-1Layer thickness and Mm layer thickness.
In one or more specific embodiments of the present application, the display structure further includes an optical adhesive layer (OCA) between the glass cover plate and the black material light absorption layer, the optical adhesive layer being composed of the optical adhesive layer 103 of the general display area and the optical adhesive layer 203 of the biometric identification area.
In one or more specific embodiments herein, the display structure further includes a TFE encapsulation layer, which is comprised of the TFE encapsulation layer 104 of the general display region and the encapsulation layer 204 of the biometric identification region.
In one or more specific embodiments of the present application, the display structure further comprises a transmission layer, which is composed of the transmission layer 105 of the general display area and the transmission layer 205 of the biometric identification area.
In one or more specific embodiments of the present application, as shown in fig. 8, the light emitting pixel array 101 of the general display area and the light emitting pixel array 201 of the biometric area are controlled to emit light by the driving module 500 of the driving layer 107 of the general display area and the driving layer 207 of the biometric area, respectively, to supply the current required by the brightness requirement of each area, wherein the driving module 502 of the general display area controls the light emitting pixel array 101 of the general display area, and the driving module 501 of the biometric area controls the light emitting pixel array 201 of the biometric area.
Since the density of the light emitting pixel array 201 of the biometric feature recognition area is less than that of the light emitting pixel array 101 of the general display area, when the OLED screen is used for a display function, the luminance of the general display area 100 and the biometric feature recognition area 200 of the OLED screen needs to reach the same display luminance (light emitting intensity) in order to achieve the picture display uniformity,therefore, the light-emitting pixel array 101 in the general display area and the light-emitting pixel array 201 in the biometric identification area are respectively controlled by the respective driving circuits, and the current supplied by the circuit of the light-emitting pixel array 201 in the biometric identification area is larger than the current supplied by the light-emitting pixel array 101 in the general display area, that is: i isfinger>Igeneral(Ifinger: a biometric identification area; i isgeneral: a general display area); when the OLED screen is used for a biological feature recognition function, the light emitting pixel array 201 of the biological feature recognition area modulates and emits light in a wave band range required by biological recognition.
The size (A) of the biological characteristic identification area 200 is matched with the structural size (B) of the optical characteristic identification module under the screen, and the requirement that A is larger than or equal to B is met, so that the optical characteristic identification module under the screen can receive enough light carrying biological characteristic information, and accurate identification is realized.
Referring to fig. 9-10, fig. 9 is a schematic diagram showing that the general display area of the OLED screen and the biometric identification area have different light-emitting pixel distributions, and fig. 10 is a schematic diagram showing a cross-section (cross-section along fig. 9D-D) showing that the general display area of the OLED screen and the biometric identification area have different light-emitting pixel distributions.
The display area of fig. 9 is composed of a screen general display area 100 and a biometric identification area 200, the light-emitting pixel array 101 of the general display area is disposed in the general display area 100, and the light-emitting pixel array 201 of the biometric identification area is disposed in the biometric identification area 200.
The display structure of fig. 10 includes a driving layer and a light-emitting pixel layer located above the driving layer, the light-emitting pixel layer can be driven by the driving layer to emit light, the driving layer is composed of a driving layer 107 of a general display region and a driving layer 207 of a biometric feature recognition region, the light-emitting pixel layer is composed of a light-emitting pixel layer of the general display region and a light-emitting pixel layer of the biometric feature recognition region, a light-emitting pixel array 101 of the general display region constitutes a light-emitting pixel layer of the general display region, and a light-emitting pixel array 201 of the biometric feature recognition region constitutes a light-emitting pixel layer of the biometric feature recognition region.
In one or more specific embodiments of the present application, the light emitting pixel array 101 of the general display area may include a light emitting pixel 101a of the general display area, a light emitting pixel 101b of the general display area, and a light emitting pixel 101c of the general display area, and the light emitting pixel array 101 and the corresponding RGB filter element 106 in combination emit corresponding color light, wherein the light emitting pixel 101a of the general display area and the R filter element generate light of a red wavelength band; the pixels 101b and the G filter elements in the general display area generate green band light; the pixels 101c and the B filter elements in the general display area generate light in the blue wavelength band.
In one or more specific embodiments of the present application, the light-emitting pixel array 201 of the biometric identification area may include a light-emitting pixel array 201a of the biometric identification area, a light-emitting pixel array 201b of the biometric identification area, and a light-emitting pixel array 201c of the biometric identification area, the light-emitting pixel array 201 and the corresponding RGB filter element 206 emitting light of corresponding colors in combination, wherein the light-emitting pixel array 201a of the biometric identification area and the R filter element generate light of red wavelength band; the light-emitting pixel array 201b and the G filter element in the biological characteristic identification area generate green-band light; the light emitting pixel array 201c and the B filter element of the biometric identification area generate light in the blue wavelength band.
The display structure of fig. 10 further includes a black material light absorption layer, which is composed of the black material light absorption layer 108 of the general display area and the black material light absorption layer 208 of the biometric identification area, and is located above the light emitting pixel layer, and in order to prevent the black material light absorption layer from absorbing light required for use, a light passage (for example, a through hole may be formed) for allowing light to pass therethrough is provided on the black material light absorption layer, and the light passage is composed of the light passage of the general display area and the light passage of the biometric identification area. The black material light absorption layer reduces the reflection of external environment light, improves the display contrast under sunlight, and can prevent the interference of the external environment light without a polaroid after the display structure is provided with the black material light absorption layer with a light channel.
In one or more specific embodiments herein, the black material light absorbing layer may be a black glue light absorbing layer.
In one or more specific embodiments of the present application, a filter element is disposed in the light channel of the black material light absorption layer, and the filter element only allows light with a specific wavelength to pass through, so as to achieve a filtering effect. The filter elements are comprised of an array of filter elements 106 for the general display area and an array of filter elements 206 for the biometric identification area.
In one or more specific embodiments of the present application, the display structure further comprises a glass cover plate positioned over the light absorbing layer of black material, the glass cover plate being comprised of the glass cover plate 102 of the general display area and the glass cover plate 202 of the biometric identification area.
In one or more specific embodiments of the present application, the density of the light-emitting pixel array 201 of the biometric identification area of fig. 5 is less than the density of the light-emitting pixel array 101 of the general display area, when the density of the light-emitting pixel array 201 of the biometric identification area is less than the density of the light-emitting pixel array 101 of the general display area, the number of corresponding metal cathodes is reduced, the area of the light-blocking area of the biometric identification area 200 is reduced, the light blocking capability for the light reflected back by the living body is weakened, the corresponding reflected light of the area passing through the screen is increased, the light transmittance of the area is improved, and the optical biometric identification module under the screen obtains more biometric information light.
In one or more specific embodiments of the present application, the display structure further includes an optical adhesive layer (OCA) between the glass cover plate and the black material light absorption layer, the optical adhesive layer being composed of the optical adhesive layer 103 of the general display area and the optical adhesive layer 203 of the biometric identification area.
In one or more specific embodiments herein, the display structure further includes a TFE encapsulation layer, which is comprised of the TFE encapsulation layer 104 of the general display region and the encapsulation layer 204 of the biometric identification region.
In one or more specific embodiments of the present application, the display structure further comprises a transmission layer, which is composed of the transmission layer 105 of the general display area and the transmission layer 205 of the biometric identification area.
Although the display structure of fig. 9-10 does not have the anti-reflection coating layer plated on the biometric feature recognition area 200, and the transmittance of the OLED screen in this area is lower than that in fig. 5-6, because the density of the light-emitting pixel array 201 in the biometric feature recognition area is lower than that of the light-emitting pixel array 101 in the general display area, the intensity of the information light received by the optical biometric feature recognition module in the biometric feature recognition area 200 is lower than that in fig. 5-6, and the image quality is relatively slightly poor, but the standard requirement of biometric recognition can be met.
Referring to fig. 11-12, fig. 11 is a schematic diagram showing that the general display area of the OLED screen and the biometric identification area have different light-emitting pixel distributions, and fig. 12 is a schematic diagram showing that the general display area of the OLED screen and the biometric identification area have different light-emitting pixel distributions in a cross-section (cross-section along fig. 11E-E).
The display area of fig. 11 is composed of a screen general display area 100 and a biometric identification area 200, the light-emitting pixel array 101 of the general display area is disposed in the general display area 100, and the light-emitting pixel array 201 of the biometric identification area is disposed in the biometric identification area 200.
The display structure of fig. 12 includes a driving layer and a light-emitting pixel layer located above the driving layer, the light-emitting pixel layer can be driven by the driving layer to emit light, the driving layer is composed of a driving layer 107 of a general display region and a driving layer 207 of a biometric feature recognition region, the light-emitting pixel layer is composed of a light-emitting pixel layer of the general display region and a light-emitting pixel layer of the biometric feature recognition region, a light-emitting pixel array 101 of the general display region constitutes a light-emitting pixel layer of the general display region, and a light-emitting pixel array 201 of the biometric feature recognition region constitutes a light-emitting pixel layer of the biometric feature recognition region.
In one or more specific embodiments of the present application, the light emitting pixel array 101 of the general display area may include a light emitting pixel 101a of the general display area, a light emitting pixel 101b of the general display area, and a light emitting pixel 101c of the general display area, and the light emitting pixel array 101 and the corresponding RGB filter element 106 in combination emit corresponding color light, wherein the light emitting pixel 101a of the general display area and the R filter element generate light of a red wavelength band; the pixels 101b and the G filter elements in the general display area generate green band light; the pixels 101c and the B filter elements in the general display area generate light in the blue wavelength band.
In one or more specific embodiments of the present application, the light-emitting pixel array 201 of the biometric identification area may include a light-emitting pixel array 201a of the biometric identification area, a light-emitting pixel array 201b of the biometric identification area, and a light-emitting pixel array 201c of the biometric identification area, the light-emitting pixel array 201 and the corresponding RGB filter element 206 emitting light of corresponding colors in combination, wherein the light-emitting pixel array 201a of the biometric identification area and the R filter element generate light of red wavelength band; the light-emitting pixel array 201b and the G filter element in the biological characteristic identification area generate green-band light; the light emitting pixel array 201c and the B filter element of the biometric identification area generate light in the blue wavelength band.
The display structure of fig. 12 further includes a black material light absorption layer, which is composed of the black material light absorption layer 108 of the general display area and the black material light absorption layer 208 of the biometric identification area, and is located above the light emitting pixel layer, and in order to prevent the black material light absorption layer from absorbing light required for use, a light passage (for example, a through hole may be formed) for allowing light to pass therethrough is provided on the black material light absorption layer, and the light passage is composed of the light passage of the general display area and the light passage of the biometric identification area. The black material light absorption layer reduces the reflection of external environment light, improves the display contrast under sunlight, and can prevent the interference of the external environment light without a polaroid after the display structure is provided with the black material light absorption layer with a light channel.
In one or more specific embodiments herein, the black material light absorbing layer may be a black glue light absorbing layer.
In one or more specific embodiments of the present application, a filter element is disposed in the light channel of the black material light absorption layer, and the filter element only allows light with a specific wavelength to pass through, so as to achieve a filtering effect. The filter elements are comprised of an array of filter elements 106 for the general display area and an array of filter elements 206 for the biometric identification area.
In one or more specific embodiments of the present application, the display structure further comprises a glass cover plate positioned over the light absorbing layer of black material, the glass cover plate being comprised of the glass cover plate 102 of the general display area and the glass cover plate 202 of the biometric identification area.
In one or more specific embodiments of the present application, the density of the light-emitting pixel array 201 of the biometric identification area of fig. 11 is less than the density of the light-emitting pixel array 101 of the general display area, when the density of the light-emitting pixel array 201 of the biometric identification area is less than the density of the light-emitting pixel array 101 of the general display area, the number of corresponding metal cathodes is reduced, the area of the light-blocking area of the biometric identification area 200 is reduced, the light blocking capability for the light reflected back by the living body is weakened, the corresponding reflected light of the area passing through the screen is increased, the light transmittance of the area is improved, and the optical biometric identification module under the screen obtains more biometric information light.
In one or more embodiments of the present disclosure, the display structure further includes an anti-reflection film layer 209 for increasing the transmittance of the light reflected from the biometric identification area.
In one or more specific embodiments of the present disclosure, the antireflection film layer 209 is disposed between the glass cover plate 202 of the biometric identification area and the optical adhesive layer 203 of the biometric identification area, and the number of layers M of the antireflection film layer 309 is greater than or equal to 1(M is an integer greater than 1), and the number of layers is designed according to the transmittance of the biometric identification area of the screen.
In one or more specific embodiments of the present application, the material of antireflective film layer 209 has a refractive index niRelated to the number M of the plated film layers, when the anti-reflection film layer 2 is not less than M and not less than 0, the method
Film system model design, lambda is the central wavelength of the anti-reflection of the film layer, and the refractive index n used by the film system model designi(e.g., TiO)2) Refractive index n greater than the glass cover plate0(in general n)01.5) and less than the refractive index n of the optical cement layer (OCA)OCAWherein, when M is 1, nOCA＞n1＞n0(ii) a When M is 2, nOCA＞n2＞n1＞n0。
When the antireflection film layer M is more than 2, that is, when the antireflection film layer has three or more layers, as shown in FIG. 7, a film having a thickness of less than 2 is used
Multilayer model structure, namely: the optical thickness of a layer (i.e., the Mm layer) adjacent to the glass cover plate 202 of the biometric identification area is satisfied
(partially reflective film), a layer adjacent to the optical glue layer 203 of the biometric identification area (i.e., M)1Layer) optical thickness of
(partially reflective film), M1The optical glue layer 203 of the layer and the biometric identification area is considered as a half mirror, M2-m-1Is a spacer layer having an optical thickness of
(the interface defined by the spacer layer acts as the effective interface).
The thickness and the refractive index of the Mm layer satisfy the formula:
M2-m-1the layer thickness and the refractive index satisfy the formula:
M1the layer thickness and the refractive index satisfy the formula:
wherein n is1、n2And n3Respectively correspond to M1Refractive index of layer Material, M2-m-1Refractive index of layer material and refractive index of Mm layer material, d1、d2And d3Respectively correspond to M1Layer thickness, M2-m-1Layer thickness and Mm layer thickness.
In one or more specific embodiments of the present application, the display structure further includes an optical adhesive layer (OCA) between the glass cover plate and the black material light absorption layer, the optical adhesive layer being composed of the optical adhesive layer 103 of the general display area and the optical adhesive layer 203 of the biometric identification area.
In one or more specific embodiments herein, the display structure further includes a TFE encapsulation layer, which is comprised of the TFE encapsulation layer 104 of the general display region and the encapsulation layer 204 of the biometric identification region.
In one or more specific embodiments of the present application, the display structure further comprises a transmission layer, which is composed of the transmission layer 105 of the general display area and the transmission layer 205 of the biometric identification area.
The size (A) of the biological characteristic identification area 200 is matched with the structural size (B) of the optical characteristic identification module under the screen, and the requirement that A is larger than or equal to B is met, so that the optical characteristic identification module under the screen can receive enough light carrying biological characteristic information, and accurate identification is realized.
In the display area of the screen structure shown in fig. 12, the light emitting pixel arrays 201 of the biometric identification area 200 are uniformly distributed in the form of a periodic pattern.
The periodic pattern of the biometric feature recognition area 200 may be regular triangles, diamonds, quadrangles, hexagons, etc., and the density of the light emitting pixel array 201 of the biometric feature recognition area is smaller than that of the light emitting pixel array 101 of the general display area, so as to realize high transmittance of information light of the biometric feature recognition area.
Based on the display structure, the application also provides the electronic equipment.
An electronic device comprises the display structure.
The electronic device includes, but is not limited to, a mobile phone, a tablet computer, a wearable device, a door control device, an ATM machine, and the like.
In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may for example be fixed or indirectly connected through intervening media, or may be internal or interactive of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A display structure with increased light transmission comprising:
the light-emitting pixel layer consists of a light-emitting pixel layer of a general display area and a light-emitting pixel layer of a biological characteristic identification area, the light-emitting pixel array of the general display area forms the light-emitting pixel layer of the general display area, and the light-emitting pixel array of the biological characteristic identification area forms the light-emitting pixel layer of the biological characteristic identification area;
the driving layer consists of a driving layer of a general display area and a driving layer of a biological characteristic identification area;
the density of the light emitting pixel array of the biometric identification area is less than the density of the light emitting pixel array of the general display area.
2. The increased light transmittance display structure according to claim 1, further comprising a black material light absorption layer, wherein the black material light absorption layer is provided with a light channel for allowing light to pass therethrough, the black material light absorption layer is composed of the black material light absorption layer of the general display region and the black material light absorption layer of the biometric identification region, and the light channel is composed of the light channel of the general display region and the light channel of the biometric identification region.
3. The light transmittance enhancement display structure of claim 2, wherein the black material light absorbing layer has filter elements disposed in the light passage, the filter elements comprising an array of filter elements for the general display area and an array of filter elements for the biometric identification area.
4. The display structure with increased light transmittance according to any one of claims 1 to 3, wherein the driving layer of the general display region comprises a driving module of the general display region, the driving layer of the biometric region comprises a driving module of the biometric region, and the light-emitting pixel array of the general display region and the light-emitting pixel array of the biometric region are respectively driven by the driving module of the general display region and the driving module of the biometric region.
5. The display structure with increased light transmittance according to claim 4, wherein the current supplied by the circuits of the light-emitting pixel arrays of the biometric identification region is larger than the current supplied by the light-emitting pixel arrays of the general display region, and the driving circuits of the biometric identification region control the light-emitting pixels to modulate and emit the light within the wavelength range required for biometric identification during biometric identification.
6. The increased light transmission display structure of any of claims 1-3, further comprising a glass cover and/or an encapsulant layer and/or an optical glue layer and/or a transmission layer; the glass cover plate consists of a glass cover plate in a general display area and a glass cover plate in a biological characteristic identification area; the packaging layer consists of a packaging layer of a general display area and a packaging layer of a biological characteristic identification area; the optical adhesive layer consists of an optical adhesive layer in a general display area and an optical adhesive layer in a biological characteristic identification area; the transmission layer is composed of a transmission layer of the general display area and a transmission layer of the biological characteristic identification area.
7. The increased light transmission display structure of claim 4 further comprising a glass cover sheet and/or an encapsulant layer and/or an optical glue layer and/or a transmission layer; the glass cover plate consists of a glass cover plate in a general display area and a glass cover plate in a biological characteristic identification area; the packaging layer consists of a packaging layer of a general display area and a packaging layer of a biological characteristic identification area; the optical adhesive layer consists of an optical adhesive layer in a general display area and an optical adhesive layer in a biological characteristic identification area; the transmission layer is composed of a transmission layer of the general display area and a transmission layer of the biological characteristic identification area.
8. The increased light transmission display structure of claim 5 further comprising a glass cover sheet and/or an encapsulant layer and/or an optical glue layer and/or a transmission layer; the glass cover plate consists of a glass cover plate in a general display area and a glass cover plate in a biological characteristic identification area; the packaging layer consists of a packaging layer of a general display area and a packaging layer of a biological characteristic identification area; the optical adhesive layer consists of an optical adhesive layer in a general display area and an optical adhesive layer in a biological characteristic identification area; the transmission layer is composed of a transmission layer of the general display area and a transmission layer of the biological characteristic identification area.
9. The increased light transmission display structure of any one of claims 1-3, wherein the biological feature recognition area size A of the display structure matches the structural size B of the underscreen optical feature recognition module, wherein A ≧ B.
10. An electronic device comprising the light transmittance enhancing display structure of any one of claims 1-9.
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