CN111998940B - Display screen assembly, electronic equipment and ambient light intensity detection method - Google Patents
Display screen assembly, electronic equipment and ambient light intensity detection method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
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Abstract
The embodiment of the application provides a display screen assembly, electronic equipment and an ambient light intensity detection method, wherein the display screen assembly comprises the following components: a first polarizer layer for forming linearly polarized light; an organic light emitting layer for generating natural light including a first light and a second light; a second polarizer layer; a first light sensor; a second light sensor; the linearly polarized light is transmitted to the first light sensor or reflected to the second light sensor; the first light is transmitted to the first light sensor, and the second light is reflected to the second light sensor. In the display screen assembly, the first light sensor and the second light sensor are used for simultaneously detecting the ambient light and the natural light generated by the organic light-emitting layer, so that the influence of the natural light generated by the organic light-emitting layer on the ambient light detection can be reduced or avoided, and the accuracy of ambient light intensity detection can be improved.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a display screen assembly, an electronic device, and an ambient light intensity detection method.
Background
With the development of electronic technology, the screen ratio of electronic devices such as smartphones is larger and larger, so that the area on the display screen of the electronic devices for setting electronic devices such as sensors is smaller and smaller. Accordingly, on more and more electronic devices, a light sensor is disposed under a display screen to detect ambient light through the light sensor.
Disclosure of Invention
The embodiment of the application provides a display screen assembly, electronic equipment and an ambient light intensity detection method, which can improve the accuracy of detecting the ambient light intensity.
An embodiment of the present application provides a display screen assembly, including:
a first polarizer layer for forming linearly polarized light when ambient light is transmitted;
an organic light emitting layer for generating natural light including a first light and a second light;
the organic light-emitting layer is arranged between the first polaroid layer and the second polaroid layer, and the second polaroid layer and the organic light-emitting layer form a preset angle;
the first light sensor is arranged towards the light emergent surface of the second polaroid layer;
the second light sensor is arranged towards the light incident surface of the second polaroid layer, and the light incident surface is opposite to the light emergent surface; wherein the method comprises the steps of
When the linearly polarized light is transmitted to the second polaroid layer through the organic light-emitting layer, the linearly polarized light is transmitted to the first light sensor through the light-emitting surface or reflected to the second light sensor through the light-entering surface;
the first light passes through the second polaroid layer and is transmitted to the first light sensor through the light emergent surface, and the second light is reflected to the second light sensor through the light emergent surface.
The embodiment of the application also provides electronic equipment, which comprises:
a housing;
the display screen assembly is arranged on the shell and is the display screen assembly.
The embodiment of the application also provides an ambient light intensity detection method, which is applied to electronic equipment, wherein the electronic equipment comprises a display screen assembly, the display screen assembly is the display screen assembly, and the ambient light intensity detection method comprises the following steps:
acquiring first light intensity detected by a first light sensor;
acquiring the second light intensity detected by a second light sensor;
and calculating the ambient light intensity according to the first light intensity and the second light intensity.
In the display screen assembly provided by the embodiment of the application, the first light sensor and the second light sensor are used for simultaneously detecting the ambient light and the natural light generated by the organic light-emitting layer, so that the influence of the natural light generated by the organic light-emitting layer on the ambient light detection can be reduced or avoided, and the accuracy of ambient light intensity detection can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a first structure of a display screen assembly according to an embodiment of the present application.
FIG. 3 is a schematic view of a first light propagation in the display screen assembly of FIG. 2.
FIG. 4 is a schematic view of a second light propagation in the display screen assembly of FIG. 2.
FIG. 5 is a schematic diagram of a second polarizer layer in the display panel assembly of FIG. 2.
Fig. 6 is a schematic diagram of a second structure of a display screen assembly according to an embodiment of the present application.
Fig. 7 is a schematic diagram of a third structure of a display screen assembly according to an embodiment of the present application.
Fig. 8 is a schematic diagram of a fourth structure of a display screen assembly according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or the like, and may also be a game device, an AR (Augmented Reality ) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or the like.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present application. The electronic device 100 includes a housing 10, a display assembly 20, and a processor 30.
The housing 10 is used to form the exterior profile and overall frame of the electronic device 100. It will be appreciated that the housing 10 may be used to mount various functional modules of the electronic device 100, such as a camera, a circuit board, a battery, etc.
The display screen assembly 20 is mounted on the housing 10. Wherein the display screen assembly 20 is used for displaying information, such as displaying images, text, etc. In addition, the display screen assembly 20 may further include a light sensor for detecting an intensity of ambient light, so that the electronic device 100 may automatically control the display brightness of the display screen assembly 20 when displaying information according to the intensity of ambient light detected by the light sensor.
The processor 30 is mounted inside the housing 10. Wherein the processor 30 is electrically connected to the display screen assembly 20, such that the processor 30 can control the display of the display screen assembly 20. In addition, the processor 30 may be configured to process the data detected by the light sensor in the display screen assembly 20, for example, to analyze the data detected by the light sensor to obtain the intensity of the ambient light.
Referring to fig. 2, fig. 2 is a schematic diagram of a first structure of a display screen assembly 20 according to an embodiment of the present application. The display panel assembly 20 includes a first polarizer layer 21, an organic light emitting layer 22, a second polarizer layer 23, a first light sensor 24, and a second light sensor 25.
In the description of the present application, it should be understood that terms such as "first," "second," and the like are used merely to distinguish between similar objects and should not be construed to indicate or imply relative importance or implying any particular order of magnitude of the technical features indicated.
Wherein the first polarizer layer 21, the organic light emitting layer 22, and the second polarizer layer 23 are sequentially disposed. That is, the organic light emitting layer 22 is disposed between the first polarizer layer 21 and the second polarizer layer 23. The organic light emitting layer 22 may be disposed in parallel with the first polarizer layer 21. The side of the first polarizer layer 21 is the side facing the user when the display screen assembly 20 displays information. That is, the side of the first polarizer layer 21 is the light-emitting side of the display panel assembly 20 when displaying information.
It will be appreciated that the side of the first polarizer layer 21 is also the incident side of the ambient light, and the ambient light may be incident into the display screen assembly 20 from the side of the first polarizer layer 21. The ambient light is light in the external environment, such as sunlight, light emitted by a fluorescent lamp, and the like. Ambient light includes light rays in all possible vibration directions perpendicular to the propagation direction of the light waves, and therefore does not exhibit polarization or is understood to be unpolarized light. When the ambient light is incident into the display screen assembly 20 through the first polarizer layer 21, the first polarizer layer 21 may polarize the ambient light to form linearly polarized light, so that the ambient light incident into the display screen assembly 20 through the first polarizer layer 21 is linearly polarized light.
Wherein the first polarizer layer 21 has a polarizing axis, and the polarizing axis of the first polarizer layer 21 may be referred to as a first polarizing axis. The direction of the first polarizing axis is the same as the polarization direction of the light that can be transmitted through the first polarizer layer 21. That is, in the ambient light, a portion of the light having the polarization direction parallel to the first polarization axis may pass through the first polarizer layer 21, while a portion of the light having the polarization direction perpendicular to the first polarization axis may not pass through the first polarizer layer 21.
The organic light emitting layer 22 is used to generate light so that the display screen assembly 20 can emit light to the outside, thereby allowing a user to observe information displayed by the display screen assembly 20. The Organic Light Emitting layer 22 may include a plurality of Organic Light Emitting Diodes (OLEDs).
It is understood that the light generated by the organic light emitting layer 22 is natural light, which may also be understood as unpolarized light, and the natural light does not exhibit polarization. When the natural light generated from the organic light emitting layer 22 is transmitted to the first polarizer layer 21, the first polarizer layer 21 polarizes the natural light such that the natural light becomes linearly polarized light. Thus, the user can normally observe the information displayed by the display screen assembly 20. In addition, natural light generated from the organic light emitting layer 22 may be transmitted toward the side where the second polarizer layer 23 is located.
The second polarizer layer 23 forms a predetermined angle α with the organic light emitting layer 22. The preset angle α may range from greater than 0 degrees to less than 90 degrees. That is, the preset angle α is an acute angle. For example, the preset angle α may be 45 degrees, 60 degrees, or the like.
The second polarizer layer 23 may also polarize light. Wherein the second polarizer layer 23 includes a polarizing axis, and the polarizing axis of the second polarizer layer 23 may be referred to as a second polarizing axis. It will be appreciated that when natural light is transmitted to the second polarizer layer 23, a portion of the natural light having a polarization direction parallel to the second polarization axis may pass through the second polarizer layer 23, and a portion of the natural light having a polarization direction perpendicular to the second polarization axis may not pass through the second polarizer layer 23. Among the natural light generated by the organic light emitting layer 22, a portion of the light having the polarization direction parallel to the second polarization axis may be referred to as a first light, and a portion of the light having the polarization direction perpendicular to the second polarization axis may be referred to as a second light. The first light may pass through the second polarizer layer 23, and the second light may not pass through the second polarizer layer 23. It is understood that the proportion of the first light and the second light in the natural light is the same. That is, 50% of the natural light is the first light, and the other 50% of the natural light is the second light.
The second polarizer layer 23 may also reflect light. Specifically, a portion of the light having the polarization direction perpendicular to the second polarization axis cannot pass through the second polarizer layer 23, but may be reflected by the second polarizer layer 23.
The second polarizer layer 23 includes a light incident surface 231 and a light emergent surface 232. The light incident surface 231 is an incident surface when light is transmitted to the second polarizer layer 23, and the light emergent surface 232 is an emergent surface when light is transmitted through the second polarizer layer 23. The light incident surface 231 faces the organic light emitting layer 22, and the light incident surface 231 faces the light emitting surface 232. When the natural light generated by the organic light-emitting layer 22 is transmitted to the second polarizer layer 23, the first light is incident from the light-incident surface 231 and exits from the light-emergent surface 232 after passing through the second polarizer layer 23; the second light is reflected at the light incident surface 231 and is reflected.
Furthermore, it will be appreciated that when ambient light is incident on the interior of the display screen assembly 20, the ambient light forms linearly polarized light when transmitted through the first polarizer layer 21, which remains linearly polarized after transmitted through the organic light-emitting layer 22, and then the linearly polarized light may be transmitted to the second polarizer layer 23. When the polarization direction of the linearly polarized light is parallel to the second polarization axis, the linearly polarized light may pass through the second polarizer layer 23 and exit from the light exit surface 232; when the polarization direction of the linearly polarized light is perpendicular to the second polarization axis, the linearly polarized light cannot pass through the second polarizer layer 23, but is reflected at the light incident surface 231 and is reflected.
The first light sensor 24 is disposed towards the light-emitting surface 232 of the second polarizer layer 23, that is, the signal receiving surface of the first light sensor 24 faces the light-emitting surface 232. The second light sensor 25 is disposed towards the light incident surface 231 of the second polarizer layer 23, that is, the signal receiving surface of the second light sensor 25 is facing the light incident surface 231. The first light sensor 24 and the second light sensor 25 may be disposed on a circuit board or a middle frame of the electronic device 100 for fixing. The first light sensor 24 and the second light sensor 25 may be used to detect the intensity of light. For example, the first light sensor 24 and the second light sensor 25 may be photoelectric sensors, for converting received optical signals into corresponding electrical signals, so as to detect light intensity.
The process of detecting the light intensity by the first light sensor 24 and the second light sensor 25 will be described below.
When the ambient light is incident into the display screen assembly 20 from the first polarizer layer 21, the ambient light is transmitted through the first polarizer layer 21 to form linearly polarized light, and the linearly polarized light is transmitted to the second polarizer layer 23 after being transmitted through the organic light-emitting layer 22. When the polarization direction of the linearly polarized light is parallel to the polarization axis of the second polarizer layer 23, the linearly polarized light passes through the second polarizer layer 23 and is transmitted to the first light sensor 24 through the light exit surface 232, and the first light sensor 24 receives the linearly polarized light. When the polarization direction of the linearly polarized light is perpendicular to the polarization axis of the second polarizer layer 23, the linearly polarized light is reflected at the light incident surface 231 of the second polarizer layer 23, and is reflected by the light incident surface 231 to the second light sensor 25, and the second light sensor 25 receives the linearly polarized light.
When the natural light generated by the organic light emitting layer 22 is transmitted to the second polarizer layer 23, a first light ray of the natural light is transmitted through the second polarizer layer 23 and is transmitted to the first light ray sensor 24 from the light emitting surface 232, and the first light ray sensor 24 receives the first light ray. The second light in the natural light is reflected at the light incident surface 231 of the second polarizer layer 23, and is reflected by the light incident surface 231 to the second light sensor 25, and the second light sensor 25 receives the second light.
Thus, the first light sensor 24 may receive a first light of the linearly polarized light and the natural light, and the second light sensor 25 may receive a second light of the natural light; alternatively, the first light sensor 24 may receive a first light of the natural light, and the second light sensor 25 may receive a second light of the linearly polarized light and the natural light.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a first light propagation in the display assembly 20 shown in fig. 2.
Wherein the polarization axis of the first polarizer layer 21 is denoted as a first polarization axis, and the polarization axis of the second polarizer layer 23 is denoted as a second polarization axis. The second polarization axis is parallel to the first polarization axis. When the ambient light X passes through the first polarizer layer 21, the first polarizer layer 21 polarizes the ambient light X to form linearly polarized light X 1 The linearly polarized light X 1 Is parallel to the first polarization axis. Thus, the linearly polarized light X 1 Is also parallel to the second polarizing axis. Thus, the linearly polarized light X 1 The light may be transmitted through the second polarizer layer 23 while being transmitted through the organic light emitting layer 22 to the second polarizer layer 23. Thus, the first light sensor 24 may receive the linearly polarized light X 1 。
Of the natural light Y generated by the organic light-emitting layer 22, a first light Y 1 Is parallel to the second polarization axis, and the second light ray Y 2 Is perpendicular to the second polarization axis. Thus, the first light ray Y 1 The first light sensor 24 can receive the first light Y through the second polarizer layer 23 1 . The second light ray Y 2 The light incident surface 231 of the second polarizer layer 23 is reflected to the second light sensor 25, and the second light sensor 25 can receive the second light Y 2 。
Thus, the first light sensor 24 can receive the linearly polarized light X 1 And the first light ray Y 1 The second light sensor 25 may receive the second light Y 2 。
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a second light propagation in the display assembly 20 shown in fig. 2.
Wherein the polarization axis of the first polarizer layer 21 is denoted as a first polarization axis, and the polarization axis of the second polarizer layer 23 is denoted as a second polarization axis. The second polarization axis is perpendicular to the first polarization axis. When the ambient light X passes through the first polarizer layer 21, the first polarizer layer 21 polarizes the ambient light X to form linearly polarized light X 2 The linearly polarized light X 2 Is parallel to the first polarization axis. Thus, the linearly polarized light X 2 Is perpendicular to the second polarizing axis. Thus, the linearly polarized light X 2 Is not transmitted through the second polarizer layer 23, but is reflected at the light incident surface 231 of the second polarizer layer 23, and is reflectedTo the second light sensor 25. Thus, the second light sensor 25 can receive the linearly polarized light X 2 。
Of the natural light Y generated by the organic light-emitting layer 22, a first light Y 1 Is parallel to the second polarization axis, and the second light ray Y 2 Is perpendicular to the second polarization axis. Thus, the first light ray Y 1 The first light sensor 24 can receive the first light Y through the second polarizer layer 23 1 . The second light ray Y 2 The light incident surface 231 of the second polarizer layer 23 is reflected to the second light sensor 25, and the second light sensor 25 can receive the second light Y 2 。
Thus, the first light sensor 24 may receive the first light Y 1 The second light sensor 25 may receive the linearly polarized light X 2 And the second light ray Y 2 。
In the electronic device 100 provided by the embodiment of the application, the first light sensor 24 and the second light sensor 25 detect the ambient light and the natural light generated by the organic light emitting layer at the same time, so that the influence of the natural light generated by the organic light emitting layer on the ambient light detection can be reduced or avoided, and the accuracy of ambient light intensity detection can be improved.
The following describes a process of calculating the intensity of the ambient light by the electronic device 100 based on the data detected by the first light sensor 24 and the second light sensor 25.
The data detected by the first light sensor 24 and the second light sensor 25 may be calculated by the processor 30 of the electronic device 100 to obtain the ambient light intensity.
It is understood that the processor 30 of the electronic device 100 may be electrically connected to the first light sensor 24 and the second light sensor 25. Thus, the processor 30 can obtain the first light intensity W detected by the first light sensor 24 1 And acquires the second light intensity detected by the second light sensor 25Degree W 2 . Subsequently, the processor 30 generates a first light intensity W according to the first light intensity 1 The second light intensity W 2 The ambient light intensity is calculated.
When the second polarizing axis of the second polarizer layer 23 is parallel to the first polarizing axis of the first polarizer layer 21, the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 and transmitted to the first light sensor 24 from the light emitting surface 232, the processor 30 calculates the intensity of ambient light by the following formula:
W 1 ＝I 1 ac 1 +0.5I 2 c 1
W 2 ＝0.5I 2 d 2
thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 D, for the transmittance of the second polarizer layer to the linearly polarized light and the transmittance to the first light 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
When the second polarizing axis of the second polarizer layer 23 is perpendicular to the first polarizing axis of the first polarizer layer 21, the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 and reflected to the second light sensor 25 by the light incident surface 231, the processor 30 calculates the intensity of the ambient light by the following formula:
W 1 ＝0.5I 2 c 1
W 2 ＝I 1 ad 2 +0.5I 2 d 2
Thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 D, for the transmittance of the second polarizer layer to the first light 2 And the reflectivity of the second polaroid layer to the linearly polarized light and the reflectivity to the second light are the same.
It will be appreciated that in the above formula, the parameters a, c 1 、d 2 The determination may be made experimentally during development and production of the electronic device 100. Thus, parameters a, c 1 、d 2 It is understood as a fixed parameter.
In practical applications, when the natural light generated by the organic light emitting layer 22 is transmitted to the second polarizer layer 23, the second polarizer layer 23 has a certain reflectivity for the first light, and the second polarizer layer 23 also has a certain transmittance for the second light.
Since the reflectivity of the second polarizer layer 23 to the first light and the transmittance of the second polarizer layer 23 to the second light are small, for example, may be 1%, 3%, etc., the reflectivity of the second polarizer layer 23 to the first light and the transmittance of the second polarizer layer 23 to the second light are directly ignored in the above formula. It will be appreciated that the above formula may be calculated to obtain the ambient light intensity I 1 But due to the reflection of the first light by the second polarizer layer 23 and the transmission of the second light by the second polarizer layer 23, the calculated ambient light intensity I 1 Is relatively low.
To increase the calculated ambient light intensity I 1 When the second polarizing axis of the second polarizer layer 23 is parallel to the first polarizing axis of the first polarizer layer 21, the linearly polarized light is transmitted throughWhen the organic light emitting layer 22 is transmitted to the second polarizer layer 23 and transmitted from the light emitting surface 232 to the first light sensor 24, the processor 30 may calculate the ambient light intensity by the following formula:
W 1 ＝I 1 ac 1 +0.5I 2 (c 1 +d 1 )
W 2 ＝0.5I 2 (c 2 +d 2 )
thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 For the second light intensity, a is the total transmittance of the first polarizer layer 21 and the organic light-emitting layer 22 to ambient light, c 1 C for the transmittance of the second polarizer layer 23 to the linearly polarized light and the transmittance to the first light 2 For the reflectivity d of the second polarizer layer 23 to the first light 1 D, the transmittance of the second light ray for the second polarizer layer 23 2 Is the reflectivity of the second polarizer layer 23 for the second light.
When the second polarizing axis of the second polarizer layer 23 is perpendicular to the first polarizing axis of the first polarizer layer 21, the processor 30 may calculate the intensity of the ambient light by the following formula when the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 and reflected to the second light sensor 25 by the light incident surface 231:
W 1 ＝0.5I 2 (c 1 +d 1 )
W 2 ＝I 1 ad 2 +0.5I 2 (c 2 +d 2 )
thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 For the second light intensity, a is the total transmittance of the first polarizer layer 21 and the organic light-emitting layer 22 to ambient light, c 1 C being the transmittance of the second polarizer layer 23 for the first light 2 For the reflectivity d of the second polarizer layer 23 to the first light 1 D, the transmittance of the second light ray for the second polarizer layer 23 2 Reflectivity of the second polarizer layer 23 for the linearly polarized light and reflectivity for the second light.
It will be appreciated that in the above formula, the parameters a, c 1 、c 2 、d 1 、d 2 The determination may be made experimentally during development and production of the electronic device 100. Thus, parameters a, c 1 、c 2 、d 1 、d 2 It is understood as a fixed parameter.
In the above formula, since the reflection of the first light and the transmission of the second light by the second polarizer layer 23 are considered, the influence of the reflection of the first light and the transmission of the second light by the second polarizer layer 23 on the intensity of the computing environment light can be reduced or avoided, so that the accuracy of the intensity of the computing environment light can be improved.
Referring to fig. 5, fig. 5 is a schematic view illustrating a structure of a second polarizer layer 23 in the display panel assembly of fig. 2.
Wherein the second polarizer layer 23 is a metal wire grid polarizer. The transmission and reflection of light is achieved by a metal wire grid polarizer 23.
The metal wire grid polarizer 23 includes a substrate 233 and a plurality of metal wire grids 234. The substrate 233 may be a sheet made of plastic, glass, or the like, for example. For example, the substrate 233 may be a sheet made of PC (Polycarbonate), COP (optical material), acryl, or the like.
The plurality of metal wire grids 234 are distributed in parallel on the substrate 233. The metal wire grid 234 may be a microstructure formed of a metal material. The width of each metal wire grid 234 may be greater than or equal to 50 nm and less than or equal to 100 nm, and the distance between each two adjacent metal wire grids 234 may be greater than or equal to 20 nm and less than or equal to 200 nm.
Referring to fig. 6, fig. 6 is a schematic diagram of a second structure of a display screen assembly 20 according to an embodiment of the present application.
Wherein the display screen assembly 20 further comprises a support 26. The support 26 is disposed at a side of the organic light emitting layer 22 facing the second polarizer layer 23. The second polarizer layer 23 is coupled to the support 26 such that the second polarizer layer 23 may be fixed by the support 26. The region of the support 26 opposite to the second polarizer layer 23 allows light to pass through, so that the linearly polarized light formed after the ambient light passes through the first polarizer layer 21 and the natural light generated by the organic light-emitting layer 22 can pass through the support 26 and be transmitted to the second polarizer layer 23.
The material of the support member 26 may be, for example, glass, transparent plastic, or the like. The second polarizer layer 23 may be fastened to the support member 26 by snap-fit, glue adhesion, or the like.
Referring to fig. 7, fig. 7 is a schematic diagram of a third structure of a display screen assembly 20 according to an embodiment of the present application.
Wherein the display screen assembly 20 further comprises a first slide layer 271 and a second slide layer 272. The first slide layer 271 and the second slide layer 272 can be quarter wavelength slide layers. The first glass slide layer 271 is disposed between the first polarizer layer 21 and the organic light emitting layer 22. The second slide glass layer 272 is disposed between the second polarizer layer 23 and the organic light emitting layer 22. Wherein the fast axis of the second slide layer 272 is parallel or perpendicular to the fast axis of the first slide layer 271.
For example, the fast axis direction of the first glass slide layer 271 may form an angle of 45 degrees with the polarizing axis of the first polarizer layer 21, and then the fast axis direction of the second glass slide layer 272 may form an angle of 45 degrees with the polarizing axis of the first polarizer layer 21.
In some embodiments, the support 26 is provided with a through hole 261 in a region facing the second polarizer layer 23. The through hole 261 penetrates the support 26. The second glass slide layer 272 is disposed in the through hole 261, for example, the second glass slide layer 272 may be connected with a hole wall of the through hole 261, and the hole wall of the through hole 261 is a hole wall formed by the through hole 261 on the support member 26. Thus, the thickness of the display screen assembly 20 can be prevented from being additionally increased by the second glass slide layer 272, which is beneficial to the light and thin display screen assembly 20.
When the ambient light is incident into the display screen assembly 20 from the first polarizer layer 21, the ambient light forms linearly polarized light after passing through the first polarizer layer 21, the linearly polarized light forms circularly polarized light after passing through the first glass slide layer 271, the circularly polarized light is still circularly polarized light after passing through the organic light emitting layer 22, then the circularly polarized light passes through the second glass slide layer 272 and forms linearly polarized light again, and then the linearly polarized light is transmitted to the second polarizer layer 23.
The natural light generated by the organic light emitting layer 22 is still natural light after passing through the second glass slide layer 272, and then the natural light is transmitted to the second polarizer layer 23.
Referring to fig. 8, fig. 8 is a schematic diagram of a fourth structure of a display screen assembly 20 according to an embodiment of the present application.
The display assembly 20 further includes a touch layer 28 and a cover 29.
The touch layer 28 is disposed on a side of the first polarizer layer 21 facing away from the organic light emitting layer 22. That is, the touch layer 28 is disposed on a side of the display screen assembly 20 facing the user. The touch control layer 28 may be provided with a touch control circuit to detect a touch control operation of a user, so as to implement a touch control of the electronic device 100 by the user.
The cover plate 29 is disposed on a side of the touch layer 28 facing away from the first polarizer layer 21. That is, the cover plate 29 is disposed at the outermost side of the display screen assembly 20 toward the user. The cover plate 29 may protect the display assembly 20 from scratches.
It will be appreciated that the cover 29 may be a transparent glass cover such that the cover 29 does not interfere with the user's view of what is displayed on the display screen assembly 20.
It will be appreciated that, when the display screen assembly 20 further includes the first glass slide layer 271, the second glass slide layer 272, the touch control layer 28 and the cover 29, the parameter a in the above formulas may be the total transmittance of the cover 29, the touch control layer 28, the first polarizer layer 21, the first glass slide layer 271 and the organic light emitting layer 22 to the ambient light. The transmittance of the second glass slide layer 272 to the ambient light and the natural light generated from the organic light emitting layer 22 may be denoted as b.
When the second polarizing axis of the second polarizer layer 23 is parallel to the first polarizing axis of the first polarizer layer 21, the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 and transmitted to the first light sensor 24 from the light emitting surface 232, the processor 30 calculates the intensity of ambient light by the following formula:
W 1 ＝I 1 abc 1 +0.5I 2 bc 1
W 2 ＝0.5I 2 bd 2
thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 For the second light intensity, a is the total transmittance of the cover plate 29, the touch layer 28, the first polarizer layer 21, the first glass slide layer 271, and the organic light-emitting layer 22 to ambient light, b is the transmittance of the second glass slide layer 272 to ambient light and natural light, c 1 D, for the transmittance of the second polarizer layer to the linearly polarized light and the transmittance to the first light 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
When the second polarizing axis of the second polarizer layer 23 is perpendicular to the first polarizing axis of the first polarizer layer 21, the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 and reflected to the second light sensor 25 by the light incident surface 231, the processor 30 calculates the intensity of the ambient light by the following formula:
W 1 ＝0.5I 2 bc 1
W 2 ＝I 1 abd 2 +0.5I 2 bd 2
Thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 For the second light intensity, a is the total transmittance of the cover plate 29, the touch layer 28, the first polarizer layer 21, the first glass slide layer 271, and the organic light-emitting layer 22 to ambient light, b is the transmittance of the second glass slide layer 272 to ambient light and natural light, c 1 D, for the transmittance of the second polarizer layer to the first light 2 And the reflectivity of the second polaroid layer to the linearly polarized light and the reflectivity to the second light are the same.
It will be appreciated that in the above formula, the parameters a, b, c 1 、d 2 The determination may be made experimentally during development and production of the electronic device 100. Thus, parameters a, b, c 1 、d 2 It is understood as a fixed parameter.
In some embodiments, the reflection of the first light by the second polarizer layer 23 and the transmission of the second light by the second polarizer layer 23 are considered to increase the calculated ambient light intensity I 1 When the second polarizing axis of the second polarizer layer 23 is parallel to the first polarizing axis of the first polarizer layer 21, the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 And transmitted from the light emitting surface 232 to the first light sensor 24, the processor 30 can calculate the ambient light intensity by the following formula:
W 1 ＝I 1 abc 1 +0.5I 2 b(c 1 +d 1 )
W 2 ＝0.5I 2 b(c 2 +d 2 )
thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 For the second light intensity, a is the total transmittance of the cover plate 29, the touch layer 28, the first polarizer layer 21, the first glass slide layer 271, and the organic light-emitting layer 22 to ambient light, b is the transmittance of the second glass slide layer 272 to ambient light and natural light, c 1 C for the transmittance of the second polarizer layer 23 to the linearly polarized light and the transmittance to the first light 2 For the reflectivity d of the second polarizer layer 23 to the first light 1 D, the transmittance of the second light ray for the second polarizer layer 23 2 Is the reflectivity of the second polarizer layer 23 for the second light.
When the second polarizing axis of the second polarizer layer 23 is perpendicular to the first polarizing axis of the first polarizer layer 21, the processor 30 may calculate the intensity of the ambient light by the following formula when the linearly polarized light is transmitted to the second polarizer layer 23 through the organic light emitting layer 22 and reflected to the second light sensor 25 by the light incident surface 231:
W 1 ＝0.5I 2 b(c 1 +d 1 )
W 2 ＝I 1 abd 2 +0.5I 2 b(c 2 +d 2 )
Thus, it can be calculated to
Wherein I is 1 For ambient light intensity, I 2 For natural light intensity, W, generated by the organic light-emitting layer 22 1 For the first light intensity, W 2 For the second light intensity, a is the total transmittance of the cover plate 29, the touch layer 28, the first polarizer layer 21, the first glass slide layer 271, and the organic light-emitting layer 22 to ambient light, b is the transmittance of the second glass slide layer 272 to ambient light and natural light, c 1 C being the transmittance of the second polarizer layer 23 for the first light 2 For the reflectivity d of the second polarizer layer 23 to the first light 1 D, the transmittance of the second light ray for the second polarizer layer 23 2 Reflectivity of the second polarizer layer 23 for the linearly polarized light and reflectivity for the second light.
It will be appreciated that in the above formula, the parameters a, b, c 1 、c 2 、d 1 、d 2 The determination may be made experimentally during development and production of the electronic device 100. Thus, parameters a, b, c 1 、c 2 、d 1 、d 2 It is understood as a fixed parameter.
In the electronic device 100 provided in the embodiment of the present application, the first light sensor 24 and the second light sensor 25 detect the ambient light and the natural light generated by the organic light emitting layer at the same time, and calculate the ambient light intensity according to the data detected by the first light sensor 24 and the second light sensor 25, so that the influence of the natural light generated by the organic light emitting layer on the ambient light detection can be reduced or avoided, and the accuracy of ambient light detection can be improved.
In addition, it should be noted that, in the electronic device 100 provided in the embodiment of the present application, the ambient light intensity may be directly calculated by the data detected by the first light sensor 24 and the second light sensor 25.
For example, the first light sensor 24 and the second light sensor 25 may detect light in a full-band, and the electronic device 100 may calculate the ambient light intensity according to the full-band light intensity values detected by the first light sensor 24 and the second light sensor 25.
In other embodiments, the first light sensor 24 and the second light sensor 25 may detect the light intensity value of a certain wavelength band, and superimpose the detected light intensity values of a plurality of wavelength bands to obtain the ambient light intensity value.
For example, blue light channels corresponding to wavelengths of 440nm to 460nm, green light channels corresponding to wavelengths of 490nm to 580nm, and red light channels corresponding to wavelengths of 580nm to 650nm may be respectively provided in the first and second light sensors 24 and 25. The electronic device 100 may detect the blue light intensity value through the blue light channel in the first light sensor 24 and the second light sensor 25, detect the green light intensity value through the green light channel, detect the red light intensity value through the red light channel, and then superimpose the blue light intensity value, the green light intensity value, and the red light intensity value to obtain the ambient light intensity.
The embodiment of the application also provides an ambient light intensity detection method. The ambient light intensity detection method may be applied to the electronic device 100 according to any of the above embodiments. Specific embodiments of the method for detecting ambient light intensity may refer to the above description, and will not be described herein.
The display screen assembly, the electronic device and the ambient light intensity detection method provided by the embodiment of the application are described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application and are provided to aid in the understanding of the present application. Meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (16)
1. A display screen assembly, comprising:
a first polarizer layer for forming linearly polarized light when ambient light is transmitted;
an organic light emitting layer for generating natural light including a first light and a second light;
the organic light-emitting layer is arranged between the first polaroid layer and the second polaroid layer, the second polaroid layer and the organic light-emitting layer form a preset angle, and the preset angle is an acute angle, wherein the first light can penetrate through the second polaroid layer, the second light cannot penetrate through the second polaroid layer, and the proportion of the first light and the second light in the natural light is the same; the second polaroid layer comprises a light incident surface and a light emergent surface, and the light incident surface faces the organic light-emitting layer;
The first light sensor is arranged towards the light emergent surface of the second polaroid layer;
the second light sensor is arranged towards the light incident surface of the second polaroid layer, and the light incident surface is opposite to the light emergent surface; wherein the method comprises the steps of
When the linearly polarized light is transmitted to the second polaroid layer through the organic light-emitting layer, the linearly polarized light is transmitted to the first light sensor through the light-emitting surface or reflected to the second light sensor through the light-entering surface; the first light passes through the second polaroid layer and is transmitted to the first light sensor through the light emergent surface, the second light is reflected to the second light sensor through the light incident surface, so that the first light sensor receives the linearly polarized light and the first light in the natural light, and the second light sensor receives the second light in the natural light; or the first light sensor receives a first light ray in the natural light, and the second light sensor receives a second light ray in the linearly polarized light and the natural light; when the linearly polarized light is transmitted to the second polarizer layer through the organic light-emitting layer and is transmitted to the first light sensor from the light-emitting surface, the intensity of the ambient light is as follows:
Wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 C for the transmittance of the second polarizer layer to the linearly polarized light and the transmittance to the first light 2 D, for the reflectivity of the second polarizer layer to the first light 1 D, the transmittance of the second light is the transmittance of the second polaroid layer to the second light 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
2. A display screen assembly as recited in claim 1, wherein:
the first polarizer layer includes a first polarizing axis;
the second polarizer layer comprises a second polarizing axis, and the second polarizing axis is parallel or perpendicular to the first polarizing axis;
the polarization direction of the first light is parallel to the second polarization axis, and the polarization direction of the second light is perpendicular to the second polarization axis.
3. A display screen assembly as recited in claim 2, wherein:
when the second polarizing axis is parallel to the first polarizing axis, the linearly polarized light is transmitted to the second polarizer layer through the organic light-emitting layer and is transmitted to the first light sensor through the light-emitting surface;
When the second polarizing axis is perpendicular to the first polarizing axis, the linearly polarized light is transmitted to the second polarizer layer through the organic light-emitting layer and reflected to the second light sensor by the light incident surface.
4. A display screen assembly according to any one of claims 1 to 3, wherein the second polarizer layer is a metal wire grid polarizer.
5. The display screen assembly of claim 4, wherein the metal wire grid polarizer comprises:
a substrate;
a plurality of metal wire grids distributed in parallel on the substrate.
6. A display screen assembly as claimed in any one of claims 1 to 3, further comprising:
a support member disposed at a side of the organic light emitting layer facing the second polarizer layer;
the second polaroid layer is connected with the supporting piece, and the area, opposite to the second polaroid layer, on the supporting piece allows light to pass through.
7. The display screen assembly of claim 6, further comprising:
a first slide layer disposed between the first polarizer layer and the organic light-emitting layer;
and the second slide glass layer is arranged between the second polaroid layer and the organic light-emitting layer, and the fast axis of the second slide glass layer is parallel or perpendicular to the fast axis of the first slide glass layer.
8. The display screen assembly of claim 7, wherein a region of the support facing the second polarizer layer is provided with a through hole, and the second slide layer is disposed in the through hole.
9. An electronic device, comprising:
a housing;
a display screen assembly mounted on the housing, the display screen assembly being as claimed in any one of claims 1 to 8;
the processor is electrically connected with the first light sensor and the second light sensor, and the processor is used for: acquiring first light intensity detected by the first light sensor; acquiring the second light intensity detected by the second light sensor; calculating the ambient light intensity according to the first light intensity and the second light intensity;
when the linearly polarized light is transmitted to the second polarizer layer through the organic light-emitting layer and is transmitted to the first light sensor from the light-emitting surface, the processor calculates the ambient light intensity according to the following formula:
wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 C for the transmittance of the second polarizer layer to the linearly polarized light and the transmittance to the first light 2 D, for the reflectivity of the second polarizer layer to the first light 1 D, the transmittance of the second light is the transmittance of the second polaroid layer to the second light 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
10. The electronic device of claim 9, wherein the processor calculates the ambient light intensity when the linearly polarized light is transmitted through the organic light-emitting layer to the second polarizer layer and from the light-emitting surface to the first light sensor by:
wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 Transmittance of the second polarizer layer to the linearly polarized lightAnd transmittance of the first light, d 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
11. The electronic device of claim 9, wherein the processor calculates the ambient light intensity when the linearly polarized light is transmitted through the organic light-emitting layer to the second polarizer layer and reflected from the light-in surface to the second light sensor by:
Wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 D, for the transmittance of the second polarizer layer to the first light 2 And the reflectivity of the second polaroid layer to the linearly polarized light and the reflectivity to the second light are the same.
12. The electronic device of claim 9, wherein the processor calculates the ambient light intensity when the linearly polarized light is transmitted through the organic light-emitting layer to the second polarizer layer and reflected from the light-in surface to the second light sensor by:
wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 C, for the transmittance of the second polarizer layer to the first light 2 For the second polarizer layer to the first polarizer layerReflectivity of a light ray d 1 D, the transmittance of the second light is the transmittance of the second polaroid layer to the second light 2 And the reflectivity of the second polaroid layer to the linearly polarized light and the reflectivity to the second light are the same.
13. An ambient light intensity detection method, applied to an electronic device, the electronic device including a display screen assembly, the display screen assembly being as claimed in any one of claims 1 to 8, the ambient light intensity detection method comprising:
acquiring first light intensity detected by a first light sensor;
acquiring the second light intensity detected by a second light sensor;
calculating the ambient light intensity according to the first light intensity and the second light intensity;
the linearly polarized light is transmitted to the second polarizer layer through the organic light-emitting layer and is transmitted to the first light sensor through the light-emitting surface, and when the ambient light intensity is calculated according to the first light intensity and the second light intensity, the calculation is performed according to the following formula:
wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 C for the transmittance of the second polarizer layer to the linearly polarized light and the transmittance to the first light 2 D, for the reflectivity of the second polarizer layer to the first light 1 D, the transmittance of the second light is the transmittance of the second polaroid layer to the second light 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
14. The method of claim 13, wherein the linearly polarized light is transmitted through the organic light emitting layer to the second polarizer layer and transmitted from the light emitting surface to the first light sensor, and the calculation is performed by the following formula when calculating the ambient light intensity according to the first light intensity and the second light intensity:
wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 D, for the transmittance of the second polarizer layer to the linearly polarized light and the transmittance to the first light 2 And the reflectivity of the second polarizer layer to the second light ray is the reflectivity of the second polarizer layer to the second light ray.
15. The method of claim 13, wherein the linearly polarized light is transmitted through the organic light emitting layer to the second polarizer layer and reflected from the light incident surface to the second light sensor, and the calculation is performed by the following formula when calculating the ambient light intensity according to the first light intensity and the second light intensity:
Wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 D, for the transmittance of the second polarizer layer to the first light 2 And the reflectivity of the second polaroid layer to the linearly polarized light and the reflectivity to the second light are the same.
16. The method of claim 13, wherein the linearly polarized light is transmitted through the organic light emitting layer to the second polarizer layer and reflected from the light incident surface to the second light sensor, and the calculation is performed by the following formula when calculating the ambient light intensity according to the first light intensity and the second light intensity:
wherein I is 1 For ambient light intensity, W 1 For the first light intensity, W 2 A is the total transmittance of the first polarizer layer and the organic light-emitting layer to the ambient light, c is the second light intensity 1 C, for the transmittance of the second polarizer layer to the first light 2 D, for the reflectivity of the second polarizer layer to the first light 1 D, the transmittance of the second light is the transmittance of the second polaroid layer to the second light 2 And the reflectivity of the second polaroid layer to the linearly polarized light and the reflectivity to the second light are the same.
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