Patent Description:
This disclosure relates to the field of display technologies, and the invention in particular relates to a mobile terminal and a cover.

Due to a restriction of an existing design and process, a peripheral region needs to be reserved around an existing mobile terminal to place components such as a drive circuit and a frame sealant. To shield the component in the peripheral region and ensure an appearance effect and display quality of the mobile terminal, an ink layer is usually disposed in a corresponding peripheral region of a cover body of the mobile terminal.

In a current technology, ink is directly printed on the cover body to form the ink layer in the corresponding peripheral region of the cover body. However, in this manner, there are problems such as an ink residue, an uneven thickness of printed ink, and a display color difference, which affect display and appearance effects.

<CIT> discloses an arrangement of a fingerprint sensor on which a display panel is provided on which in turn is provided a bearer layer constituted by a dielectric layer. This structure is covered by a main cover body which also extends over other elements.

<CIT> describes that a white ink pattern is printed on a surface of a PET material to obtain a light-shielding layer and that the transparent material may then be filled into regions on the PET material without ink printing so that a transparent material has the same thickness as the white ink obtained through screen printing. An adhesive layer and other structures are then formed on the PET material and adhered onto a touch panel.

Further technological background art is disclosed in <CIT>, <CIT>, <CIT>, and <CIT>.

The object of the present invention is to provide a mobile terminal and a cover, to resolve a problem of how to evenly print ink a corresponding peripheral region of the mobile terminal. This object is solved by the independent claims and further advantageous embodiments and improvements of the present invention are listed in the dependent claims. Hereinafter, the expression ". aspect according to the invention" or "according to the invention" designates subject matter of the broadest embodiment as claimed in the independent claims. Furthermore, expressions like "optionally" or "implementation" refer to further advantageous embodiments of the invention.

The invention uses the following technical solutions:
According to a first aspect according to the invention, a mobile terminal is provided, including: a display panel; a cover body, located on a light emitting side of the display panel; a photoelectric conversion apparatus, located in a display region of the mobile terminal; a bearer layer, including a non-polarized part, where the bearer layer is disposed between the cover body and the display panel, and the bearer layer is located in a partial transmissive region of the display region, where an orthographic projection of the photoelectric conversion apparatus on the bearer layer is located in an orthographic projection of the non-polarized part on the bearer layer, and the non-polarized part is configured to enable a polarization direction of light before the light passes through the non-polarized part to be the same as a polarization direction of the light after the light passes through the non-polarized part; and an ink layer, disposed on a surface of the bearer layer, where the ink layer is located in a peripheral region of the mobile terminal. In this application, the bearer layer includes the non-polarized part, and the non-polarized part has a function of not changing a polarization direction of alight. Therefore, when only a transmissive feature of light is considered without considering another light loss, there is no light intensity loss when light passes through the non-polarized part once, thereby improving a signal that finally reaches the photoelectric conversion apparatus.

Optionally, the non-polarized part is located in the display region. In this way, a material of another part of the bearer layer is not limited, so that costs of the bearer layer can be reduced.

Optionally, the non-polarized part is in a hollow-out structure, so as to simplify a process and reduce costs.

Optionally, the non-polarized part is located in the display region and the peripheral region. The non-polarized part is enabled to cover the display region, so as to reduce a filtering function of the bearer layer on displayed light, thereby improving a display effect and reducing power consumption.

Based on this, optionally, a material constituting the non-polarized part is a non-polarized material.

Optionally, the bearer layer further includes a polarized part, and the polarized part is disposed on a periphery of the non-polarized part. A material constituting the polarized part is a polarized material.

Optionally, a thickness of the bearer layer is between <NUM> and <NUM>. This helps manufacture the non-polarized part, and avoids occurrence of a segment difference to avoid unflatness of a location of the non-polarized part.

Optionally, an area of the non-polarized part is between <NUM><NUM> and <NUM><NUM>. This can minimize an area of a fingerprint recognition region while implementing a fingerprint recognition function.

Optionally, a contour of the non-polarized part coincides with a contour of the peripheral region. This can reduce, to a maximum extent, a filtering function of the bearer layer on displayed light, thereby improving a display effect and reducing power consumption.

Optionally, the mobile terminal further includes a polarization layer disposed between the display panel and the bearer layer. A material constituting the non-polarized part is a polarized material. A fast axis direction of the non-polarized part is parallel to a polarization direction of the polarization layer, and a slow axis direction of the non-polarized part is perpendicular to the polarization direction of the polarization layer. Costs of the polarized material are lower than those of a non-polarized material.

Optionally, the mobile terminal further includes a polarization layer disposed between the display panel and the bearer layer. A material constituting the non-polarized part is a polarized material. A slow axis direction of the non-polarized part is parallel to a polarization direction of the polarization layer, and a fast axis direction of the non-polarized part is perpendicular to the polarization direction of the polarization layer. Costs of the polarized material are lower than those of a non-polarized material.

Optionally, the mobile terminal further includes a polarization layer disposed between the display panel and the bearer layer. A material constituting the non-polarized part is a polarized material. A fast axis direction and a slow axis direction of the non-polarized part each form an angle of <NUM>° with a polarization direction of the polarization layer. Costs of the polarized material are lower than those of a non-polarized material.

Optionally, a thickness of the bearer layer is between <NUM> and <NUM>. This not only can ensure a bearer capability of the non-polarized part, but also can thin and lighten the mobile terminal.

Optionally, the bearer layer has a transmittance greater than <NUM>% and a haze less than <NUM>%. This can ensure that a display effect meets a requirement.

Optionally, the non-polarized part includes at least one transparent film layer. A plurality of transparent film layers may cooperate with each other to form a non-polarized part with varying flexibility to meet various requirements.

Optionally, a material constituting the non-polarized part is a non-polarized material. The mobile terminal further includes a first transparent adhesive layer, and the first transparent adhesive layer is disposed between the bearer layer and the cover body. The transparent film layer that is in the non-polarized part and that is close to the first transparent adhesive layer is the same as a material of the first transparent adhesive layer. This can improve a connection effect between film layers.

Optionally, a material constituting the non-polarized part is a non-polarized material. The mobile terminal further includes a second transparent adhesive layer, and the second transparent adhesive layer is disposed between the bearer layer and the display panel. The transparent film layer that is in the non-polarized part and that is close to the second transparent adhesive layer is the same as a material of the second transparent adhesive layer. This can improve a connection effect between film layers.

According to a second aspect according to the invention, a cover is provided, including: a cover body; a bearer layer, disposed on the cover body, where the bearer layer is located in a part of a transmissive region of the cover, the bearer layer includes a non-polarized part, and the non-polarized part is configured to enable a polarization direction of light before the light passes through the non-polarized part to be the same as a polarization direction of the light after the light passes through the non-polarized part; and an ink layer, disposed on a surface of the bearer layer, where the ink layer is located in a non-transmissive region of the cover. The ink layer is disposed on the bearer layer. In a manufacturing process, the ink layer may be coated on the bearer layer, and then the bearer layer coated with the ink layer is attached to the cover body, so as to revolve a problem that ink cannot be evenly coated when the ink is directly coated on the cover body. Based on this, the bearer layer includes the non-polarized part, and the non-polarized part does not change a polarization direction of light. Therefore, no loss is caused when light passes through the non-polarized part. When the cover is applied to a mobile terminal that has a front fingerprint recognition function, strength of a signal that finally reaches a photoelectric conversion apparatus can be improved, thereby ensuring a fingerprint recognition effect.

According to a third aspect of the present disclosure, a display component is provided. The display component includes: a display panel; a bearer layer, disposed on a light emitting side of the display panel, where the bearer layer is located in a partial transmissive region of a display region of the display component, the bearer layer includes a non-polarized part, and the non-polarized part is configured to enable a polarization direction of light before the light passes through the non-polarized part to be the same as a polarization direction of the light after the light passes through the non-polarized part; and an ink layer, disposed on a surface of the bearer layer, where the ink layer is located in a peripheral region of the display component. The ink layer is disposed on the bearer layer. In a manufacturing process, the ink layer is silkscreen printed on the bearer layer, and then the bearer layer on which the ink layer is silkscreen printed is attached to the display panel, so as to revolve a problem that ink cannot be evenly coated when the ink is directly coated on the cover. Based on this, the bearer layer includes the non-polarized part, and the non-polarized part does not change a polarization direction of light. Therefore, no loss is caused when light passes through the non-polarized part. When the display component is applied to a mobile terminal that has a front fingerprint recognition function, strength of a signal that finally reaches a photoelectric conversion apparatus can be improved, thereby ensuring a fingerprint recognition effect.

<NUM>-a mobile terminal; <NUM>-a display unit; <NUM>-a display panel; <NUM>-a sub pixel; <NUM>-an array substrate; <NUM>-an alignment substrate; <NUM>-a color filter layer; <NUM>-a liquid crystal layer; <NUM>-a frame sealant; <NUM>-a substrate; <NUM>-an OLED self-illuminated element; <NUM>-an encapsulation layer; <NUM>-a first polarization layer; <NUM>-a first hole; <NUM>-a second polarization layer; <NUM>-a second hole; <NUM>-a backlight unit; <NUM>-a through hole; <NUM>-a third polarization layer; <NUM>-a middle frame; <NUM>-a housing; <NUM>-a cover; <NUM>-a cover body; <NUM>-an ink layer; <NUM>-a PET film layer; <NUM>-a bearer layer; <NUM>-a non-polarized part; <NUM>-a transparent film layer; <NUM>-a polarized part; <NUM>-a hollow-out structure; <NUM>-a bearer film; <NUM>-a first transparent adhesive layer; <NUM>-a second transparent adhesive layer; <NUM>-a photoelectric conversion apparatus; <NUM>-a light sensitive component; A-a display region; A1-a dummy region; A2-a valid display region; B-a peripheral region; <NUM>-a transmissive region; and <NUM>-a non-transmissive region.

Unless otherwise defined, the technical terms or scientific terms used in this application shall be a general meaning understood by a person skilled in the art. The terms "first", "second", and similar words used in the specification and claims of this application do not mean any order, quantity, or importance, but are merely intended to distinguish between different components. Therefore, a feature limited by "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

The direction terms such as "left", "right", "up", and "down" are defined relative to schematic placement directions of a display apparatus in the accompanying drawings. It should be understood that these direction terms are relative concepts and are used to describe and clarify a relative direction, and may be correspondingly changed based on a change in the placement direction of the display apparatus.

An embodiment of this application provides a mobile terminal <NUM> shown in <FIG>. The mobile terminal <NUM> includes, for example, a mobile phone, a tablet computer, a personal digital assistant (personal digital assistant, PDA), and an in-vehicle computer. A specific form of the mobile terminal <NUM> is not particularly limited in this embodiment of this application. For ease of description, an example in which the mobile terminal <NUM> is a mobile phone is used below for description.

As shown in <FIG>, the mobile terminal <NUM> mainly includes a display unit <NUM>, a middle frame <NUM>, a housing <NUM>, and a cover body <NUM>. The display unit <NUM> and the middle frame <NUM> are disposed in the housing <NUM>.

The middle frame <NUM> is located between the display unit <NUM> and the housing <NUM>. The middle frame <NUM> is away from a surface of the display unit <NUM> and is configured to install internal elements such as a battery, a printed circuit board (printed circuit board, PCB), a camera (Camera), and an antenna.

The mobile terminal <NUM> further includes a central processing unit (Central Processing Unit, CPU) disposed on the PCB.

The cover body <NUM> is located on a side that is of the display unit <NUM> and that is away from the middle frame <NUM>. The cover body <NUM> may be, for example, cover glass (cover glass, CG), and the cover glass may have specific toughness.

The display unit <NUM> has a light emitting side on which a displayed picture can be seen and a back side that is disposed opposite to the light emitting side. The back side of the display unit <NUM> is close to the middle frame <NUM>, and the cover body <NUM> is disposed on the light emitting side of the display unit <NUM>.

As shown in <FIG>, the display unit <NUM> includes a display panel (display panel, DP) <NUM>.

In some embodiments of this application, as shown in <FIG>, the display panel <NUM> may be a liquid crystal display (liquid crystal display, LCD) panel. In this case, the display unit <NUM> further includes a first polarization layer <NUM> close to the light emitting side of the display panel <NUM>, and a second polarization layer <NUM> close to the back side of the display panel <NUM>. The two polarization layers are configured to provide, for the liquid crystal display panel, a backlight unit (backlight unit, BLU) <NUM> of a light source.

As shown in <FIG>, the liquid crystal display panel includes an array substrate <NUM>, an alignment substrate <NUM>, and a liquid crystal layer <NUM>. The liquid crystal layer <NUM> is disposed between the array substrate <NUM> and the alignment substrate <NUM>. The array substrate <NUM> and the alignment substrate <NUM> are matched together by using a frame sealant <NUM>, so that the liquid crystal layer <NUM> is limited in a liquid crystal cell surrounded by the array substrate <NUM>, the alignment substrate <NUM>, and the frame sealant <NUM>.

To enable the liquid crystal display panel to implement color display, as shown in <FIG>, the liquid crystal display panel further includes a color filter layer <NUM>. The color filter layer <NUM> may be disposed on the alignment substrate <NUM>. In this case, the alignment substrate <NUM> may be referred to as a color film substrate.

As shown in <FIG>, the first polarization layer <NUM> in the liquid crystal display panel may be a manufactured polarizer (polarizer). In this case, the polarizer may be attached to a surface of the light emitting side of the display panel <NUM>.

Alternatively, as shown in <FIG>, the first polarization layer <NUM> may be a wire grid polarization layer (grid polarizer, GP). For example, in a process of manufacturing the alignment substrate <NUM>, the wire gate polarization layer may be integrated into the alignment substrate <NUM> through sputtering, nanoimprinting, photolithography, or the like.

A material constituting the wire grid polarization layer may be a metal. For example, the material constituting the wire gate polarization layer includes but is not limited to aluminum (Al), copper (Cu), silver (Ag), gold (Au), chromium (Cr), and the like.

In addition, as shown in <FIG>, the second polarization layer <NUM> may be a manufactured polarizer. In this case, the second polarization layer <NUM> is disposed on a surface of the back side of the display panel <NUM>.

Alternatively, as shown in <FIG>, the second polarization layer <NUM> may be a wire gate polarization layer integrated into the array substrate <NUM> in a process of manufacturing the array substrate <NUM>.

A display principle of the mobile terminal <NUM> including the liquid crystal display panel is as follows: The backlight unit <NUM> emits white light, and white polarized light with a specific polarization direction is formed after the white light passes through the second polarization layer <NUM>. The white polarized light is irradiated into the array substrate <NUM>, and then is filtered by using the liquid crystal layer <NUM> and the color filter layer that is on the alignment substrate <NUM> to form a polarized light with three primary colors: red, green, and blue.

When a polarization direction of the polarized light is perpendicular to a polarization direction of the first polarization layer <NUM>, the polarized light cannot pass through the first polarization layer <NUM>, and no light is emitted in this case.

When the polarization direction of the polarized light is parallel to the polarization direction of the first polarization layer <NUM>, the polarized light can pass through the first polarization layer <NUM>, and emitted light has strongest light intensity in this case.

Because a liquid crystal molecule in the liquid crystal layer <NUM> has an optical rotation feature on the polarized light, a specific molecular arrangement direction may change the polarization direction of the polarized light. A polarized light direction of a liquid crystal molecule in each sub pixel (sub pixel) is changed by using a pixel circuit on the array substrate <NUM>, so that an angle between the polarized light and the first polarization layer <NUM> can be controlled, so as to control a quantity of sub pixels, in all the sub pixels, that are emitted from the first polarization layer <NUM>, to display images of different grayscales.

Therefore, the mobile terminal <NUM> including the liquid crystal display panel controls, under joint action of the first polarization layer <NUM>, the second polarization layer <NUM>, and the liquid crystal layer <NUM>, an amount of light that is emitted from the backlight unit <NUM> through the first polarization layer <NUM>, to complete display.

Alternatively, in some other embodiments of this application, as shown in <FIG>, the display panel <NUM> is an organic light emitting diode (organic light emitting diode, OLED) display panel. In this case, the display unit <NUM> further includes a third polarization layer <NUM>. The OLED display panel can emit light, and therefore the BLU does not need to be disposed in the display unit <NUM>.

As shown in <FIG>, the OLED display panel includes a substrate <NUM>, a plurality of OLED elements <NUM> disposed on the substrate <NUM>, and an encapsulation layer <NUM> disposed on a side that is of the OLED element <NUM> and that is away from the substrate <NUM>.

As shown in <FIG>, the third polarization layer <NUM> may be a polarizer. In this case, the third polarization layer <NUM> is disposed on a surface of the light emitting side of the display panel <NUM>.

Alternatively, as shown in <FIG>, the third polarization layer <NUM> may be a wire gate polarization layer, and the wire gate polarization layer is integrated into the display panel <NUM>. In this case, to ensure that the wire gate polarization layer can fulfill a function of changing a polarization direction of light, the wire gate polarization layer is disposed on the side that is of the OLED element <NUM> and that is away from the substrate <NUM>.

It should be noted that the substrate <NUM> in the OLED display panel may be made of a flexible resin material. In this case, the OLED display panel is a flexible display panel.

Alternatively, the substrate <NUM> in the OLED display panel may be made of a relatively rigid-textured material, such as glass. In this case, the OLED display panel is a rigid display panel.

A light emitting principle of the mobile terminal <NUM> including the OLED display panel is as follows: Natural light emitted from the OLED element <NUM> passes through the third polarization layer <NUM> to form display light with a single polarization direction, so as to implement clear display. Luminance of light emitted from each OLED element <NUM> can be controlled by controlling a size of an electrical signal that is input to the OLED element <NUM>.

With diversification of functions of the mobile terminal <NUM>, to prevent information disclosure, as shown in <FIG>, a photoelectric conversion apparatus <NUM> is integrated into the mobile terminal <NUM> to verify identity. For example, the photoelectric conversion apparatus is configured to implement facial recognition or fingerprint recognition. For ease of description, an example in which the photoelectric conversion apparatus <NUM> is configured to implement fingerprint recognition is used below for description.

As shown in <FIG>, the photoelectric conversion apparatus <NUM> includes a plurality of light sensitive components <NUM> arranged in arrays. As shown in <FIG>, a fingerprint recognition principle of the photoelectric conversion apparatus <NUM> is as follows: A fingerprint includes a valley line and a ridge line. When a finger is placed on the cover body <NUM>, the ridge line in the fingerprint is in contact with the cover body <NUM>, and air exists between the valley line and the cover body <NUM>.

After light emitted from the display unit <NUM> is irradiated on the finger, although the light is refracted at both the valley line and the ridge line, after the light is refracted at the valley line and the ray ridge line, intensity of reflected light is different on reflected optical paths of the valley line and the ridge line because a refractive index of the air is different from that of the finger. Therefore, each light sensitive component <NUM> in the photoelectric conversion apparatus <NUM> obtains distribution of valley lines and ridge lines of the fingerprint based on luminance of received reflected light, to implement fingerprint recognition.

One implementation of the fingerprint recognition function of the mobile terminal <NUM> is a full-panel fingerprint recognition function, and the other implementation is a local fingerprint recognition function.

The following describes an example of a disposing manner of the photoelectric conversion apparatus <NUM> in the display panel <NUM> when the mobile terminal <NUM> has a full-panel fingerprint recognition function.

In some embodiments of this application, as shown in <FIG>, the display panel <NUM> includes a plurality of pixels (pixel), each pixel includes a plurality of sub pixels (sub pixel) <NUM>, and the plurality of sub pixels <NUM> include a first color sub pixel, a second color sub pixel, and a third color sub pixel. For example, a first color is red, a second color is green, and a third color is blue. A region surrounded by the sub pixels <NUM> forms a display region A of the mobile terminal <NUM>, and a region located on a periphery of the display region A is used as a peripheral region B of the mobile terminal <NUM>.

In this case, as shown in <FIG>, the plurality of light sensitive components <NUM> in the photoelectric conversion apparatus <NUM> may be separately disposed in different sub pixels <NUM>. Certainly, to prevent the light sensitive component <NUM> from shielding displayed light, the light sensitive component <NUM> is in a transmissive structure.

In this case, the light sensitive components <NUM> in the photoelectric conversion apparatus <NUM> may be evenly distributed in the sub pixels <NUM> of the display panel <NUM>. When a user touches any location of the display panel <NUM>, fingerprint recognition can be implemented, so that the mobile terminal <NUM> can have the full-panel fingerprint recognition function.

Certainly, as shown in <FIG>, the plurality of light sensitive components <NUM> in the photoelectric conversion apparatus <NUM> may be separately disposed between adjacent sub pixels <NUM>.

In this case, when a user touches each location of the display panel <NUM>, light with a specific angle in light reflected back from a finger may pass through the sub pixel <NUM> and is then irradiated on each light sensitive component <NUM>. When the user touches any location of the display panel <NUM>, fingerprint recognition can be implemented, so that the mobile terminal <NUM> can have the full-panel fingerprint recognition function.

Based on this, in a thickness direction of the mobile terminal <NUM>, an orthographic projection of the photoelectric conversion apparatus <NUM> at least coincides with the display region A, and the projection of the photoelectric conversion apparatus <NUM> may alternatively cover the display region A. In other words, the photoelectric conversion apparatus <NUM> fills the entire display region A.

For example, as shown in <FIG>, the photoelectric conversion apparatus <NUM> may be integrated into the display panel <NUM>.

As shown in <FIG>, the photoelectric conversion apparatus <NUM> may be disposed on the light emitting side of the display panel <NUM>.

As shown in <FIG>, the photoelectric conversion apparatus <NUM> may alternatively be disposed on the back side of the display panel <NUM>.

In this case, the display panel <NUM> may be a liquid crystal display panel, or the display panel <NUM> may be an OLED display panel.

It should be noted that the backlight unit <NUM> is a light shielding component. Therefore, if a liquid crystal display unit wants to implement a full-panel fingerprint recognition function, the photoelectric conversion apparatus <NUM> cannot be located on a side that is of the backlight unit <NUM> and that is away from the display panel <NUM>, and may be located between the backlight unit <NUM> and the display panel <NUM>.

The following describes an example of a disposing manner of the photoelectric conversion apparatus <NUM> in the display panel <NUM> when the mobile terminal <NUM> has a local fingerprint recognition function.

In some other embodiments of this application, as shown in <FIG>, the photoelectric conversion apparatus <NUM> is centrally disposed in a small block of region in the display region A of the mobile terminal <NUM>. An orthographic projection of the photoelectric conversion apparatus <NUM> on the display panel <NUM> coincides with some sub pixels <NUM> of the display panel <NUM>, and all the light sensitive components <NUM> in the photoelectric conversion apparatus <NUM> cover only some sub pixels <NUM> of the display panel <NUM>, so that the mobile terminal <NUM> can have the local fingerprint recognition function.

Based on this, in a thickness direction of the mobile terminal <NUM>, the projection of the photoelectric conversion apparatus <NUM> is located in the display region A. In other words, the orthographic projection of the photoelectric conversion apparatus <NUM> coincides with a part of the display region A, and does not fill the display region A.

For example, as shown in <FIG>, the display panel <NUM> is a liquid crystal display panel, and the photoelectric conversion apparatus <NUM> may be disposed on a side that is of the backlight unit <NUM> and that is away from the display panel <NUM>. In this case, a through hole <NUM> is disposed on the backlight unit <NUM>, and the photoelectric conversion apparatus <NUM> is disposed in the through hole <NUM>. The photoelectric conversion apparatus <NUM> may be fastened to the display unit <NUM> or may be fastened to the middle frame <NUM> or the housing <NUM>, provided that the photoelectric conversion apparatus <NUM> extends into the through hole <NUM>.

It can be understood that in this case, to avoid a filtering function of the first polarization layer <NUM> and the second polarization layer <NUM> on light irradiated on the photoelectric conversion apparatus <NUM>, as shown in <FIG>, a first hole <NUM> may be disposed on the first polarization layer <NUM>, and a second hole <NUM> may be disposed on the second polarization layer <NUM>. In the thickness direction of the mobile terminal <NUM>, an orthographic projection of the first hole <NUM>, an orthographic projection of the second hole <NUM>, and an orthographic projection of the through hole <NUM> coincide with each other.

It can be understood that when the photoelectric conversion apparatus <NUM> is disposed in the through hole <NUM> on the backlight unit <NUM>, because the photoelectric conversion apparatus <NUM> does not shield displayed light, the photoelectric conversion apparatus <NUM> does not need to be limited to be transmissive.

In addition, the mobile terminal <NUM> includes a cover disposed on the light emitting side of the display panel <NUM>. The cover is configured to protect the display panel <NUM> and a circuit that are inside the mobile terminal <NUM>.

As shown in <FIG>, the cover <NUM> usually includes the cover body <NUM> shown in <FIG>, and further includes an ink layer <NUM> disposed on the cover body <NUM>. The ink layer <NUM> is located in the peripheral region B of the mobile terminal <NUM>.

A specific color of the ink layer <NUM> is not limited in this embodiment of this application, for example, may be black, yellow, white, blue, or red.

In a top view of the cover <NUM> shown in <FIG>, a location of the ink layer <NUM> may shield the peripheral region B around the display region A, to ensure an appearance effect and display quality of the mobile terminal <NUM>.

To reduce a probability that the ink layer <NUM> falls off, as shown in <FIG>, the ink layer <NUM> is disposed on a side that is of the cover body <NUM> and that is close to the display unit <NUM>.

When the ink layer <NUM> is directly formed on the cover body <NUM> by using a silkscreen printing process, as shown in <FIG> (a sectional view obtained through sectioning in an A-A' direction in <FIG>), especially when the ink layer <NUM> is directly formed on a curved cover body, in one aspect, when the ink layer <NUM> is formed on a curved surface, uneven coating of the ink layer <NUM> is prone to occur due to the unsmooth surface. In another aspect, the ink layer <NUM> flows in an arrow direction in the figure, causing ink to pile up at a corner of the curved surface. As a result, a color difference occurs in each part of the ink layer <NUM>.

To resolve the problem, as shown in <FIG> (a sectional view obtained through sectioning in an A-A' direction in <FIG>), in some embodiments of this application, the ink layer <NUM> is first silkscreen printed on a PET (polyethylene terephthalate, polyethylene terephthalate) film layer <NUM> by using the silkscreen printing process, and then the PET film layer <NUM> on which the ink layer <NUM> is silkscreen printed is attached to the cover body <NUM> by using a full lamination technology.

After the ink layer <NUM> is silkscreen printed on the flat PET film layer <NUM>, the PET film layer <NUM> is attached to the cover body <NUM>, to resolve a problem that ink is unevenly silkscreen printed, and prevent the ink from piling up. Costs of the PET film layer <NUM> are relatively low, and therefore manufacturing costs can be reduced.

However, the PET film layer <NUM> is a polarized film layer and has a polarization feature (a birefringence effect), and can change a polarization direction of light, causing a specific loss to light passing through the PET film layer <NUM>.

For example, the display unit <NUM> of the mobile terminal <NUM> includes an OLED display panel, and the photoelectric conversion apparatus <NUM> is disposed on a back side of the OLED display unit. After the cover <NUM> to which the PET film layer <NUM> is attached is applied to the mobile terminal <NUM>, a diagram of an optical path in a fingerprint recognition process is shown in <FIG>.

As shown in <FIG>, a Z direction in <FIG> is the thickness direction of the mobile terminal <NUM>, and X, Y, and Z directions are perpendicular to each other. For example, the X direction is parallel to a short side of the mobile terminal <NUM>, and the Y direction is parallel to a long side of the mobile terminal <NUM>.

As shown in <FIG>, for example, a polarization direction of the third polarization layer <NUM> included in the OLED display unit is parallel to the X direction is used. Light I<NUM> emitted from the OLED element <NUM> of the OLED display unit is natural light, and includes light parallel to the X direction and light parallel to the Y direction.

Linearly polarized light I<NUM> is formed after the self-illuminated light I<NUM> passes through the third polarization layer <NUM> (only the light parallel to the X direction can pass through the third polarization layer <NUM>, and the light parallel to the Y direction cannot pass through the third polarization layer <NUM>). When only a transmissive feature of light is considered without considering another light loss, light intensity is reduced by half to I<NUM>=<NUM>/<NUM> I<NUM>.

The PET film layer <NUM> is cut in an arbitrary direction, and usually has a birefringence effect. Therefore, the linearly polarized light I<NUM> changes to circularly polarized light I<NUM> due to the birefringence effect after passing through the PET film layer <NUM>. Without considering absorption and according to the Malus's rule, corresponding light intensity changes to I<NUM> =Io + Ie =I<NUM>(cosθ)<NUM> + I<NUM>(sinθ)<NUM>, where θ is an angle between a light polarization direction of the incident linearly polarized light and the polarization direction of the third polarization layer <NUM>, Io is referred to as an ordinary ray (also referred to as an o ray) complying with the law of refraction, and Ie is referred to as an extraordinary ray (also referred to as an e ray) that does not comply with the law of refraction.

After being reflected by a finger on a surface of the cover body <NUM>, the circularly polarized light I<NUM> is still maintained as circularly polarized light I<NUM>. If a reflection coefficient of the cover body <NUM> is A, corresponding light intensity changes to I<NUM> =A * I<NUM> = A*(Io + Ie).

After passing through the PET film layer <NUM> again, the circularly polarized light I<NUM> is still maintained as circularly polarized light I<NUM>, and corresponding light intensity changes to I<NUM> =I<NUM> = A* Io + A* Ie.

When the circularly polarized light I<NUM> passes through the third polarization layer <NUM> again to enter the OLED element <NUM>, light in the Y direction cannot effectively pass through the third polarization layer <NUM>, and only a part of the light can be projected. Light penetrating the third polarization layer <NUM> is linearly polarized light I<NUM>, and corresponding light intensity changes to I<NUM> =A * Io * (cosθ)<NUM> + A * Ie * (sinθ)<NUM>. In this case, a correspondence between I<NUM> and I<NUM> is I<NUM> = A * I<NUM> * (cosθ)<NUM> + A * I<NUM> * (sinθ)<NUM> = I<NUM> * A * [(cosθ)<NUM> + (sinθ)<NUM>] ≤ I<NUM> * A. When θ is <NUM>° or <NUM>°, I<NUM> = I<NUM> * A, and when θ is neither <NUM>° or <NUM>°, a light loss exists.

To be specific, light intensity of light irradiated on the photoelectric conversion apparatus <NUM> changes to I<NUM> =I<NUM> * A * [(cosθ)<NUM> + (sinθ)<NUM>] , a quantity of signals reflected by the finger decreases, and a signal finally reaching the photoelectric conversion apparatus <NUM> weakens, which affects a fingerprint recognition effect.

In addition, because the polarized film layer is cut in an arbitrary direction, normally, it is difficult to effectively control a polarization direction of the PET film layer. After the PET film layer <NUM> is cut, it cannot be ensured that polarization directions are consistent with each other in all parts on the PET film layer <NUM>. As a result, a performance difference of the mobile terminal <NUM> cannot be controlled, and under-panel fingerprint unlock experience is further affected.

Based on the foregoing problem, as shown in <FIG>, a bearer layer <NUM> is disposed between the cover body <NUM> and the display unit <NUM>. The bearer layer <NUM> faces the surface of the cover body <NUM> or faces the surface of the display unit <NUM>. The ink layer <NUM> is formed by using a silkscreen printing process, and the ink layer <NUM> is located in the peripheral region B of the mobile terminal <NUM>.

The bearer layer <NUM> is located in a partial transmissive region of the display region A, and the bearer layer <NUM> includes a non-polarized part <NUM>. An orthographic projection of the photoelectric conversion apparatus <NUM> on the bearer layer <NUM> is located in an orthographic projection of the non-polarized part <NUM>. The non-polarized part <NUM> is configured to enable a polarization direction of light before the light passes through the non-polarized part <NUM> to be the same as a polarization direction of the light after the light passes through the non-polarized part <NUM>.

It can be understood that in a process of manufacturing the mobile terminal <NUM>, finally there is a process of assembling the cover body <NUM> and the display unit <NUM>. Therefore, in this application, the bearer layer <NUM> is disposed on the cover body <NUM>, and the cover body <NUM> on which the bearer layer <NUM> and the ink layer <NUM> are disposed is assembled with the display unit <NUM>.

Alternatively, the bearer layer <NUM> may be disposed on the light emitting side of the display unit <NUM>, and the display unit <NUM> on which the bearer layer <NUM> and the ink layer <NUM> are disposed is assembled with the cover body <NUM>.

An example in which the display panel <NUM> included in the display unit <NUM> is an OLED display panel, and the photoelectric conversion apparatus <NUM> is disposed on a side that is of the OLED display panel and that is away from the cover <NUM> is used below for illustration. For another location relationship between the photoelectric conversion apparatus <NUM> and the OLED display panel, and a location relationship between the photoelectric conversion apparatus <NUM> and a liquid crystal display panel when the display panel <NUM> included in the display unit <NUM> is the liquid crystal display panel, reference may be made to the foregoing description, and details are not described herein again.

In the photoelectric conversion apparatus <NUM>, a location of the light sensitive component <NUM> corresponds to a location of the non-polarized part <NUM>. Therefore, when the photoelectric conversion apparatus <NUM> is located in the display region A, the non-polarized part <NUM> is located in the display region A. In this case, in the thickness direction of the mobile terminal <NUM>, the orthographic projection of the photoelectric conversion apparatus <NUM> on the bearer layer <NUM> is located in the orthographic projection of the non-polarized part <NUM> on the bearer layer <NUM>.

It can be learned from above that the non-polarized part <NUM> has a function of not changing a polarization direction of light. Regardless of whether light is emitted from a side of the display unit <NUM> to a side of the cover <NUM> or emitted from a side of the cover <NUM> to a side of the display unit <NUM>, the light does not change from linearly polarized light to circularly polarized light, or does not change from polarized light parallel to a paper surface to polarized light perpendicular to the reference surface. Therefore, when only a transmissive feature of light is considered without considering another light loss, there is no light intensity loss when light passes through the non-polarized part <NUM> once.

To ensure display quality, when a material of the bearer layer <NUM> is selected, optionally, the bearer layer <NUM> has a transmittance (transmittance) greater than <NUM>% and a haze (haze) less than <NUM>%.

In a process in which incident luminous flux leaves from an incident surface of a medium to an opposite emitting surface, a ratio of radiant energy projected on and passed through an object to total radiant energy projected on the object is referred to as a transmittance of the object. A higher transmittance indicates a better display effect and lower energy consumption. Therefore, the transmittance of the bearer layer <NUM> should be as high as possible, for example, may be <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, or <NUM>%.

The haze is a percentage occupied in total transmitted light intensity by intensity of transmitted light deviating from incident light by an angle of above <NUM>°, and a larger haze indicates a reduction in film glossy, transparency, and imaging degree. Therefore, the haze of the bearer layer <NUM> should not be excessively large, for example, may be <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, <NUM>%, or <NUM>%.

A structure of the mobile terminal <NUM> provided in this application is described below by using several examples.

In the following example, after the ink layer <NUM> is disposed on a surface that is of the bearer layer <NUM> and that is close to the cover body <NUM>, and the bearer layer <NUM> is attached to the cover body <NUM>, the cover <NUM> and the display unit <NUM> are attached to each.

For a correspondence between the non-polarized part <NUM> and the display region A, as shown in <FIG>, the non-polarized part <NUM> is located in the display region A but does not cover the display region A.

In this example, as shown in <FIG>, the mobile terminal <NUM> has a local fingerprint recognition function. For a disposing manner of the photoelectric conversion apparatus <NUM>, reference may be made to the example of the disposing manner of the photoelectric conversion apparatus <NUM> in the display panel <NUM> when the mobile terminal <NUM> has the local fingerprint recognition function.

As shown in <FIG>, the bearer layer <NUM> further includes a polarized part <NUM>, and the polarized part <NUM> is located on a periphery of the non-polarized part <NUM>. A material of the non-polarized part <NUM> is a non-polarized material, and a material of the polarized part <NUM> is a polarized material.

In other words, the polarized part <NUM> on the bearer layer <NUM> has a birefringence effect, but the non-polarized part <NUM> has no birefringence effect and does not change a polarization direction of light.

For a structure of the polarized part <NUM>, as shown in <FIG>, the polarized part <NUM> includes a hollow-out region <NUM>. As shown in <FIG>, the non-polarized part <NUM> is disposed in the hollow-out region <NUM> to be seamlessly spliced with the polarized part <NUM>.

It can be understood that a structure manufactured by using a non-polarized material does not change a polarization direction of light, and a polarized material opposite to the non-polarized material may change a polarization direction of light.

The non-polarized material may include, for example, one of an optical transparent adhesive, optical transparent resin, polyimide, or polymethyl methacrylate.

In some embodiments, as shown in <FIG>, in a process of manufacturing the cover <NUM>, the ink layer <NUM> is formed on a bearer film <NUM> by using a silkscreen printing technology. The bearer film <NUM> is in a complete-layer structure and does not include the hollow-out region <NUM>, and a material of the bearer film <NUM> is a polarized material.

After silkscreen printing of the ink layer <NUM> is completed, as shown in <FIG>, the hollow-out region <NUM> is formed on the bearer film <NUM>, to form the polarized part <NUM>. For example, the hollow-out region <NUM> may be formed on the bearer film <NUM> by using exposure, development, and etching processes.

As shown in <FIG>, the polarized part <NUM> on which the ink layer <NUM> is formed is attached to the cover body <NUM> by using a full lamination technology.

As shown in <FIG>, the hollow-out region <NUM> is filled with a non-polarized material to form the non-polarized part <NUM>, so as to manufacture the cover <NUM>.

In some embodiments, as shown in <FIG>, in a process of manufacturing the cover <NUM>, the hollow-out region <NUM> is formed on the bearer film <NUM> to form the polarized part <NUM>.

As shown in <FIG>, the ink layer <NUM> is formed in the polarized part <NUM> by using a silkscreen printing technology.

After silkscreen printing of the ink layer <NUM> is completed, the polarized part <NUM> is attached to the cover body <NUM>.

After the cover <NUM> is manufactured, the manufactured cover <NUM> and the display unit <NUM> are attached to each, to form the mobile terminal <NUM> shown in <FIG>.

In some embodiments, as shown in <FIG>, the non-polarized part <NUM> includes at least one transparent film layer <NUM>. An example in which the non-polarized part <NUM> includes three transparent film layers <NUM> is used for illustration in <FIG>.

When the non-polarized part <NUM> includes a plurality of transparent film layers <NUM>, materials of the plurality of transparent film layers <NUM> are all non-polarized materials, and parameters such as thicknesses and the materials of the plurality of transparent film layers <NUM> may be the same or may be different.

The non-polarized part <NUM> is disposed as a structure including a plurality of transparent film layers <NUM>, and the plurality of transparent film layers <NUM> may cooperate with each other to form a non-polarized part <NUM> with varying flexibility, so as to meet a plurality of requirements.

In some embodiments, as shown in <FIG>, the mobile terminal <NUM> may further include a first transparent adhesive layer <NUM> configured to bond the ink layer <NUM> and the cover body <NUM>, and a second transparent adhesive layer <NUM> configured to bond the bearer layer <NUM> and the display unit <NUM>.

To improve a connection effect between film layers, in some embodiments, the non-polarized part <NUM> includes a transparent film layer <NUM>, and a material of the transparent film layer <NUM> is the same as a material of the first transparent adhesive layer <NUM>, or a material of the transparent film layer <NUM> is the same as a material of the second transparent adhesive layer <NUM>.

In some embodiments, the non-polarized part <NUM> includes a plurality of transparent film layers <NUM>, and a material of the transparent film layer <NUM> that is in the non-polarized part <NUM> and that is close to the first transparent adhesive layer <NUM> is the same as a material of the first transparent adhesive layer <NUM>.

In some embodiments, a material of the transparent film layer <NUM> that is in the non-polarized part <NUM> and that is close to the second transparent adhesive layer <NUM> is the same as a material of the second transparent adhesive layer <NUM>.

To facilitate manufacturing of the non-polarized part <NUM>, and avoid a segment difference to avoid unflatness of a location of the non-polarized part <NUM>, optionally, a thickness of the bearer layer <NUM> is between <NUM> and <NUM>. For example, the thickness of the bearer layer <NUM> is <NUM>, <NUM>, <NUM>, or <NUM>.

To minimize an area of a fingerprint recognition region while implementing a fingerprint recognition function, in some embodiments, an area of the non-polarized part <NUM> is between <NUM><NUM> and <NUM><NUM>. A shape of the non-polarized part <NUM> is not limited, for example, the non-polarized part <NUM> is a rectangle of <NUM>×<NUM>.

The cover body <NUM> may be a flexible cover body, or may be a rigid cover body.

As shown in <FIG>, the cover body <NUM> may be a 2D (two-dimensional) flat cover body. As shown in <FIG>, the cover body <NUM> may be a 3D (three-dimensional) curved cover body.

Based on this, in some embodiments, as shown in <FIG>, the display region A includes a dummy (dummy) region A1 and a valid display region A2. In a display process, sub pixels <NUM> located in the dummy region A1 display a black image, and sub pixels <NUM> located in the valid display region A2 is configured to implement a display function of the mobile terminal <NUM>.

It should be noted that in the display process, an electrical signal that drives the sub pixel <NUM> to perform display first passes through the sub pixel <NUM> located in the dummy region A1, and then enters the sub pixel <NUM> located in the valid display region A2. A process in which the electrical signal passes through the dummy region A1 is also a step-by-step stabilization process, and the dummy region A1 may fulfill a function of stabilizing the electrical signal. In addition, the dummy region A1 is configured to define a boundary of the valid display region A2, and fulfills a locating function.

The ink layer <NUM> is disposed on the bearer layer <NUM>. As shown in <FIG> (a sectional view obtained through sectioning in a B-B' direction in <FIG>), the ink layer <NUM> may extend into the dummy region A1.

Based on the mobile terminal, a diagram of an optical path in a fingerprint recognition process is shown in <FIG>. X, Y, and Z directions in <FIG> are the same as the directions in <FIG>.

For example, a polarization direction of the third polarization layer <NUM> included in the OLED display unit is parallel to the X direction. Light I<NUM> emitted from the OLED element <NUM> of the OLED display unit is natural light, and includes light parallel to the X direction and light parallel to the Y direction.

Linearly polarized light I<NUM> is formed after the self-illuminated light I<NUM> passes through the third polarization layer <NUM> (only the light in the X direction can pass through the third polarization layer <NUM>, and the light in the Y direction cannot pass through the third polarization layer <NUM>). When only a transmissive feature of light is considered without considering another light loss, light intensity is reduced by half to I<NUM> = <NUM>/<NUM> I<NUM>.

The non-polarized part <NUM> does not change a polarization direction of light. Therefore, after the linearly polarized light I<NUM> passes through the non-polarized part <NUM> on the bearer layer <NUM>, the light is still linearly polarized light I<NUM>, and corresponding light intensity changes to I<NUM> =I<NUM>.

After being reflected by a finger on a surface of the cover body <NUM>, the linearly polarized light I<NUM> is still maintained as linearly polarized light I<NUM>. If a reflection coefficient of the cover body <NUM> is A, corresponding light intensity changes to I<NUM> =A * I<NUM>.

After passing through the non-polarized part <NUM> on the bearer layer <NUM>, the linearly polarized light I<NUM> is still maintained as linearly polarized light I<NUM>, and corresponding light intensity changes to I<NUM> =I<NUM>.

When the linearly polarized light I<NUM> passes through the third polarization layer <NUM> again to enter the OLED element <NUM>, because a polarization direction of the light always remains unchanged, there is no light intensity loss when the linearly polarized light I<NUM> passes through the third polarization layer <NUM> again. Light penetrating the third polarization layer <NUM> is linearly polarized light I<NUM>, and corresponding light intensity changes to I<NUM> =I<NUM> =A * I<NUM>.

To be specific, light intensity of light irradiated on the photoelectric conversion apparatus <NUM> changes to I<NUM> =I<NUM> =A * I<NUM>, and no loss is caused when light passes through the non-polarized part <NUM>, so that strength of a signal that finally reaches the photoelectric conversion apparatus <NUM> can be improved, thereby ensuring a fingerprint recognition effect.

According to the mobile terminal <NUM> provided in this embodiment of this application, the ink layer <NUM> is disposed on the bearer layer <NUM>. In a process of manufacturing the mobile terminal <NUM>, after the ink layer <NUM> is silkscreen printed on the bearer layer <NUM>, the bearer layer <NUM> on which the ink layer <NUM> is silkscreen printed is attached to the cover body <NUM> or the display unit <NUM>, so as to avoid that ink cannot be evenly silkscreen printed when the ink is directly silkscreen printed on the cover body <NUM>, to resolve problems such as a color difference in each part of the ink layer <NUM> or ink piling up at a corner of the curved cover body.

Based on this, the bearer layer <NUM> includes the non-polarized part <NUM>, and the non-polarized part <NUM> does not change a polarization direction of light. Therefore, no loss is caused when light passes through the bearer layer <NUM>, so that strength of a signal that finally reaches the photoelectric conversion apparatus <NUM> can be improved, thereby ensuring a fingerprint recognition effect.

In addition, the bearer layer <NUM> further includes the polarized part <NUM>. The material of the polarized part <NUM> is a polarized material, and costs of the polarized material are relatively low. In this way, manufacturing costs can be reduced.

A difference between this example and Example <NUM> lies in that the non-polarized part <NUM> has a relatively large area and covers the display region A.

For a correspondence between the non-polarized part <NUM> and the display region A, as shown in <FIG>, the non-polarized part <NUM> covers the display region A.

In some embodiments, as shown in <FIG>, the non-polarized part <NUM> may exactly coincide with the display region A.

In some embodiments, considering a process error, as shown in <FIG>, the non-polarized part <NUM> may cover the display region A and extend into the peripheral region B.

In this example, the mobile terminal <NUM> may have a full-panel fingerprint recognition function. In this case, as shown in <FIG>, in the thickness direction of the mobile terminal <NUM>, an orthographic projection of the photoelectric conversion apparatus <NUM> covers the display region A. For a disposing manner of the photoelectric conversion apparatus <NUM>, reference may be made to the example of the disposing manner of the photoelectric conversion apparatus <NUM> in the display panel <NUM> when the mobile terminal <NUM> has the full-panel fingerprint recognition function.

The mobile terminal <NUM> may alternatively have a local fingerprint recognition function. In this case, as shown in <FIG>, in the thickness direction of the mobile terminal <NUM>, an orthographic projection of the photoelectric conversion apparatus <NUM> is located in the display region A. For a disposing manner of the photoelectric conversion apparatus <NUM>, reference may be made to the example of the disposing manner of the photoelectric conversion apparatus <NUM> in the display panel <NUM> when the mobile terminal <NUM> has the local fingerprint recognition function.

In this example, the non-polarized part <NUM> is enabled to cover the display region A, so as to reduce a filtering function of the bearer layer <NUM> on displayed light, thereby improving a display effect and reducing power consumption.

A difference between this example and Example <NUM> lies in that as shown in <FIG>, the non-polarized part <NUM> on the bearer layer <NUM> is in a hollow-out structure.

The non-polarized part <NUM> on the bearer layer <NUM> is in the hollow-out structure, that is, a hollow-out region <NUM> is disposed on the bearer layer <NUM>. The hollow-out region <NUM> is filled with air rather than a material.

In some embodiments, because light is refracted in the air, to avoid that an excessively thick air layer in the hollow-out structure (a thickness of the air layer is equal to a thickness of the bearer layer <NUM>) has a relatively large impact on an optical path, the thickness of the bearer layer <NUM> is between <NUM> and <NUM>.

The non-polarized part <NUM> is filled with no material, so that the non-polarized part <NUM> is an air layer, to reduce used materials, simplify a manufacturing process, reduce costs, and improve efficiency.

The bearer layer <NUM> includes only the non-polarized part <NUM>, and a material of the bearer layer <NUM> is a non-polarized material. For a correspondence between the non-polarized part <NUM> and the display region A, as shown in <FIG>, a contour of the non-polarized part <NUM> coincides with a contour of the peripheral region B.

The non-polarized material includes, for example, one of an optical transparent adhesive, optical transparent resin, polyimide, or polymethyl methacrylate.

In some embodiments, to ensure a bearer capability of the non-polarized part <NUM>, a thickness of the non-polarized part <NUM> is greater than <NUM>. Considering a lightweight and thinness requirement for the mobile terminal <NUM>, the thickness of the non-polarized part <NUM> is less than <NUM>.

The thickness of the non-polarized part <NUM> is, for example, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or <NUM>.

It can be understood that materials and thicknesses of the transparent film layers <NUM> may be the same or may be different, but the materials of the transparent film layers <NUM> are necessarily non-polarized materials.

In this example, the mobile terminal <NUM> may have a full-panel fingerprint recognition function. In this case, as shown in <FIG>, in a thickness direction of the mobile terminal <NUM>, an orthographic projection of the photoelectric conversion apparatus <NUM> covers the display region A.

The mobile terminal <NUM> may alternatively have a local fingerprint recognition function. In this case, as shown in <FIG>, in the thickness direction of the mobile terminal <NUM>, an orthographic projection of the photoelectric conversion apparatus <NUM> is located in the display region A.

In this example, the material of the bearer layer <NUM> is selected as a non-polarized material, so that there is no birefringence effect throughout the bearer layer <NUM>, to reduce shielding of the bearer layer <NUM> on displayed light and improve a display effect.

A difference between this example and Example <NUM> lies in that a material of the bearer layer <NUM> is a polarized material.

The bearer layer <NUM> includes only the non-polarized part <NUM>. For a correspondence between the non-polarized part <NUM> and the display region A, as shown in <FIG>, a contour of the non-polarized part <NUM> coincides with a contour of the peripheral region B.

A fast axis direction of the non-polarized part <NUM> is parallel to a polarization direction of a polarization layer that is of the display unit <NUM> and that is close to the cover body <NUM>, and a slow axis direction of the bearer layer <NUM> is perpendicular to the polarization direction of the polarization layer.

It can be understood that when the display panel <NUM> included in the display unit <NUM> is a liquid crystal display panel, the polarization layer herein may be the first polarization layer <NUM>.

When the display panel <NUM> included in the display unit <NUM> is an OLED display panel, the polarization layer herein is the third polarization layer <NUM>.

In this embodiment of this application, a light vector (light vector) direction with a slow propagation speed in the non-polarized part <NUM> is a slow axis, and a light vector direction with a fast propagation speed in the non-polarized part <NUM> is a fast axis.

The non-polarized part <NUM> may be, for example, a PET film layer. Because the fast axis direction of the non-polarized part <NUM> is parallel to the polarization direction of the polarization layer of the display unit <NUM>, a polarization direction of light does not change regardless of a specific region, in the non-polarized part <NUM>, from which the light is emitted.

It should be understood that "perpendicular" does not mean "absolute perpendicular". That A is perpendicular to B may mean: An angle between A and B falls within a range of [<NUM>-a, <NUM>+a]. "Parallel" does not mean "absolute parallel" either. That A is parallel to B may mean: An angle between A and B falls within a range of [<NUM>, b].

In this case, when polarized light emitted from the display unit <NUM> passes through the bearer layer <NUM>, the slow axis direction does not change a polarization direction of transmitted light, and the polarization direction of the transmitted light is parallel to the fast axis direction. A polarization state of incident light does not change when the incident light passes through the bearer layer <NUM>.

In this example, the same as in Example <NUM>, the mobile terminal <NUM> may have a full-panel fingerprint recognition function, or may have a local fingerprint recognition function.

A difference between this example and Example <NUM> lies in that a slow axis direction of the non-polarized part <NUM> is parallel to a polarization direction of a polarization layer of the display unit <NUM>, and a fast axis direction of the non-polarized part <NUM> is perpendicular to the polarization direction of the polarization layer.

For a correspondence between the non-polarized part <NUM> and the display region A, as shown in <FIG>, a contour of the non-polarized part <NUM> coincides with a contour of the peripheral region B.

In this case, when polarized light emitted from the display unit <NUM> passes through the bearer layer <NUM>, the fast axis direction does not change a polarization direction of transmitted light, and the polarization direction of the transmitted light is parallel to the slow axis direction. A polarization state of incident light does not change when the incident light passes through the bearer layer <NUM>.

A difference between this example and Example <NUM> lies in that a fast axis direction and a slow axis direction of the non-polarized part <NUM> each form an angle of <NUM>° with a polarization direction of a polarization layer of the display unit <NUM>.

In some embodiments, a thickness of the non-polarized part <NUM> meets the following formula: <MAT>.

In the formula, nfast is a refractive index in the fast axis direction of the non-polarized part <NUM>, nslow is a refractive index in the slow axis direction of the non-polarized part <NUM>, T is the thickness of the non-polarized part <NUM>, m is a positive integer, and λ is a wavelength. The fast axis direction of the non-polarized part <NUM> is perpendicular to the slow axis direction of the non-polarized part <NUM>.

It should be understood that A and B form an angle of <NUM>° does not mean that A and B absolutely form the angle of <NUM>°. That A and B form an angle of <NUM>° may mean: An angle between A and B falls with a range of [<NUM>-c, <NUM>+c].

Because a fast axis and a slow axis of the bearer layer <NUM> are perpendicular to each other, the polarization direction of the polarization layer forms an angle of <NUM>° with each of the fast axis direction and the slow axis direction of the bearer layer <NUM>, a light loss in the fast axis direction is exactly emitted from the slow axis, and a light loss in the slow axis direction is exactly emitted from the slow axis. Therefore, incident light has a relatively small light loss when passing through the bearer layer <NUM>.

An embodiment of this application further provides a cover <NUM>. As shown in <FIG>, the cover <NUM> includes a transmissive region <NUM> and a non-transmissive region <NUM>, and the cover <NUM> includes a cover body <NUM>, a bearer layer <NUM>, and an ink layer <NUM>.

The bearer layer <NUM> is disposed on the cover body <NUM>, and the bearer layer <NUM> is located in a part of the transmissive region <NUM>. The bearer layer <NUM> includes a non-polarized part <NUM>, and the non-polarized part <NUM> is configured to enable a polarization direction of light before the light passes through the non-polarized part <NUM> to be the same as a polarization direction of the light after the light passes through the non-polarized part <NUM>.

The ink layer <NUM> is disposed on a surface of the bearer layer <NUM>, and the ink layer <NUM> is located in the non-transmissive region <NUM>.

The cover body <NUM> may be a flexible substrate, or may be a rigid substrate.

As shown in <FIG>, division of the transmissive region <NUM> and the non-transmissive region <NUM> is unrelated to a shape of the cover body <NUM>. For a curved cover, an arc surface unnecessarily can be only the non-transmissive region <NUM>, and may be a part of the transmissive region <NUM>.

As shown in <FIG>, the non-polarized part <NUM> may be located in the transmissive region <NUM> but does not cover the transmissive region <NUM>.

As shown in <FIG>, the non-polarized part <NUM> may cover the transmissive region <NUM>. For example, the entire bearer layer <NUM> may be used as the non-polarized part <NUM>.

As shown in <FIG>, the ink layer <NUM> is disposed on a surface that is of the bearer layer <NUM> and that is close to the cover body <NUM>.

As shown in <FIG>, the ink layer <NUM> is disposed on a surface that is of the bearer layer <NUM> and that is away from the cover body <NUM>.

According to the cover <NUM> provided in this embodiment of this application, the ink layer <NUM> is disposed on the bearer layer <NUM>. In a manufacturing process, the ink layer <NUM> may be coated on the bearer layer <NUM>, and then the bearer layer <NUM> coated with the ink layer <NUM> is attached to the cover body <NUM>, so as to revolve a problem that ink cannot be evenly coated when the ink is directly coated on the cover body <NUM>. Based on this, the bearer layer <NUM> includes the non-polarized part <NUM>, and the non-polarized part <NUM> does not change a polarization direction of light. Therefore, no loss is caused when light passes through the non-polarized part <NUM>. When the cover <NUM> is applied to a mobile terminal that has a front fingerprint recognition function, strength of a signal that finally reaches a photoelectric conversion apparatus <NUM> can be improved, thereby ensuring a fingerprint recognition effect.

An embodiment of this application further provides a display component. As shown in <FIG>, the display component includes a display panel <NUM>, a bearer layer <NUM>, and an ink layer <NUM>.

The bearer layer <NUM> is located on a light emitting side of the display panel <NUM>, and the bearer layer <NUM> is located in a partial transmissive region of a display region A of the display component. The bearer layer <NUM> includes a non-polarized part <NUM>, and the non-polarized part <NUM> is configured to enable a polarization direction of light before the light passes through the non-polarized part <NUM> to be the same as a polarization direction of the light after the light passes through the non-polarized part <NUM>.

The ink layer <NUM> is disposed on a surface of the bearer layer <NUM>, and the ink layer <NUM> is located in a peripheral region B of the display component.

The display panel <NUM> may be a liquid crystal display panel, or may be an OLED display panel.

As shown in <FIG>, the ink layer <NUM> may be disposed on a side that is of the bearer layer <NUM> and that is away from the display panel <NUM>.

As shown in <FIG>, the ink layer <NUM> may be disposed on a side that is of the bearer layer <NUM> and that is close to the display panel <NUM>.

As shown in <FIG>, the non-polarized part <NUM> may be located in the display region A but does not cover the display region A.

As shown in <FIG>, the non-polarized part <NUM> may cover the display region A.

According to the display component provided in this embodiment of this application, the ink layer <NUM> is disposed on the bearer layer <NUM>. In a manufacturing process, the ink layer <NUM> is silkscreen printed on the bearer layer <NUM>, and then the bearer layer <NUM> on which the ink layer <NUM> is silkscreen printed is attached to the display panel <NUM>, so as to revolve a problem that ink cannot be evenly coated when the ink is directly coated on the cover <NUM>. Based on this, the bearer layer <NUM> includes the non-polarized part <NUM>, and the non-polarized part <NUM> does not change a polarization direction of light. Therefore, no loss is caused when light passes through the non-polarized part <NUM>. When the display component is applied to a mobile terminal that has a front fingerprint recognition function, strength of a signal that finally reaches a photoelectric conversion apparatus <NUM> can be improved, thereby ensuring a fingerprint recognition effect.

Claim 1:
A mobile terminal (<NUM>), comprising:
a display panel (<NUM>);
a cover body (<NUM>), located on a light emitting side of the display panel (<NUM>);
a photoelectric conversion apparatus (<NUM>), located in a display region (A) of the mobile terminal (<NUM>);
a bearer layer (<NUM>), comprising a non-polarized part (<NUM>), wherein the bearer layer (<NUM>) is disposed between the cover body (<NUM>) and the display panel (<NUM>), and the bearer layer (<NUM>) is located in a partial transmissive region (<NUM>) of the display region (A), wherein
an orthographic projection of the photoelectric conversion apparatus (<NUM>) on the bearer layer (<NUM>) is located in an orthographic projection of the non-polarized part (<NUM>) on the bearer layer (<NUM>), and the non-polarized part (<NUM>) is configured to enable a polarization direction of light before the light passes through the non-polarized part (<NUM>) to be the same as a polarization direction of the light after the light passes through the non-polarized part (<NUM>); and
an ink layer (<NUM>), disposed on a surface of the bearer layer (<NUM>), wherein the ink layer (<NUM>) is located in a peripheral region (B) around the display region (A);
wherein the ink layer (<NUM>) is first silkscreen printed on a polyethylene terephthalate, PET, film layer (<NUM>) by using the silkscreen printing process, and then the PET film layer (<NUM>) on which the ink layer (<NUM>) is silkscreen printed is attached to the cover body (<NUM>) by using a full lamination technology.