Patent Description:
The hole-punch screen is a design scheme with a front camera of a mobile phone arranged underneath a display screen, including two designs: punching a through hole and providing a transparent hole, into a display panel (Panel). Being provided right underneath the display screen, the camera occupies no mobile phone frame space, allowing an ultra-narrow frame, a higher screen-to-body ratio, and a better full screen effect. The transparent hole scheme, also known as blind hole scheme, can achieve a smaller aperture with little impact on an active area (AA) of the display screen, and therefore has been widely adopted by mobile phone manufacturers.

An AMOLED hole-punch screen adopting the blind hole scheme needs to have a hole punched in a polarizer (POL) at a position corresponding to the transparent hole of the panel, so that light can pass through a display module to reach the camera underneath the panel. Because the POL has a thickness (typically <NUM>-<NUM>), the POL hole cannot be fully filled at the edge with an optical clear adhesive (OCA) currently in use for full fit and fit bubbles exist there, which affect appearance and reliability testing. <CIT> relates to a display panel and a display device. <CIT> relates to a polarizer and a manufacturing process thereof. <CIT> relates to a full-screen dispensing and bonding process, a full screen and an electronic device. <CIT> relates to a display component and a terminal device having the same.

The present invention discloses a hole-punch screen and an electronic device, to resolve a problem of bubbles present in a punched hole in the prior art. The scope of the present invention is determined only by the scope of the appended claims. More precisely, the present invention provides a hole-punch screen according to claim <NUM>. A corresponding electronic device comprising the hole-punch screen is provided in claim <NUM>. Further detailed in the dependent claims referring back to these claims.

Based on the foregoing objective, an embodiment of the present invention discloses a hole-punch screen, including:.

For the foregoing objective, an embodiment of the present invention further discloses an electronic device, including the foregoing hole-punch screen.

The technical solutions provided in the present invention can achieve the following beneficial effects:.

In the hole-punch screen disclosed in the present invention, before the polarizer is attached to the light-transmitting cover, the first through hole is first filled with the optical clear glue, which is in liquid form so that the first through hole can be fully filled and no bubbles is generated in the first through hole when the optical clear glue is solidified, thereby not affecting appearance and reliability testing.

The drawings described herein are used to disclose a further understanding about the present invention, and constitute a part of the present invention. They are used to explain the present invention without constituting any inappropriate limitation on the present invention. In the drawings:.

Reference signs are described as follows: <NUM>. light-transmitting cover; <NUM>. polarizer; <NUM>. optical clear glue; <NUM>. first through hole; <NUM>. glass component; <NUM>. upper glass; <NUM>. first recess; <NUM>. first recess bottom; <NUM>. first groove; <NUM>. lower glass; <NUM>. second recess; <NUM>. second groove; <NUM>. second recess bottom; <NUM>. foam; <NUM>. second through hole; <NUM>. frame adhesive; <NUM>. support column; and <NUM>. optical clear double-sided adhesive.

To make the objectives, technical solutions, and advantages of the present invention clearer, the following clearly and completely describes the technical solutions of the present invention with reference to specific embodiments of the present invention and corresponding drawings.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to <FIG>, an embodiment of the present invention discloses a hole-punch screen, which includes a light-transmitting cover <NUM>, a polarizer <NUM>, and a glass component <NUM>.

The light-transmitting cover <NUM> may be a clear part such as a glass cover, which mainly plays a protective role.

The polarizer <NUM> is attached to the light-transmitting cover <NUM>, the polarizer <NUM> is provided with a first through hole <NUM>, and the first through hole <NUM> is filled with optical clear glue <NUM>. The first through hole <NUM> can be fully filled with the optical clear glue <NUM>, without affecting passage of light. Before the polarizer <NUM> is attached to the light-transmitting cover <NUM>, the first through hole <NUM> is first filled with the optical clear glue <NUM>, which is in liquid form and has good fluidity so that the first through hole <NUM> can be fully filled and no bubbles is generated in the first through hole <NUM> when the optical clear glue <NUM> is solidified, thereby not affecting appearance and reliability testing. In addition, the optical clear glue <NUM> and the polarizer <NUM> can be bonded together, which prevents displacement and helps subsequent installation of other components.

The glass component <NUM> is attached to the polarizer <NUM> so that the polarizer <NUM> is located between the light-transmitting cover <NUM> and the glass component <NUM>. The glass component <NUM> is provided with a second through hole <NUM> at a position corresponding to the first through hole <NUM>. The second through hole <NUM> cooperates with the first through hole <NUM> to allow light to pass through.

The glass component <NUM> may include upper glass <NUM>, lower glass <NUM>, support columns <NUM>, and foam <NUM>.

The upper glass <NUM> is directly attached to the polarizer <NUM>, and the lower glass <NUM> is attached to the upper glass <NUM> via a frame adhesive <NUM>. The frame adhesive <NUM> is located between the upper glass <NUM> and the lower glass <NUM>, and the frame adhesive <NUM> is arranged in a ring along a circumferential direction of the upper glass <NUM> so that the frame adhesive <NUM> encloses an inner cavity between the upper glass <NUM> and the lower glass <NUM>. The lower glass <NUM> is located on a side of the upper glass <NUM> facing away from the polarizer <NUM>. In addition, a plurality of support columns <NUM> are also filled between the upper glass <NUM> and the lower glass <NUM>, the plurality of support columns <NUM> are spaced apart between the upper glass <NUM> and the lower glass <NUM>, and the plurality of support columns <NUM> are all located in the inner cavity. After the foam <NUM> is attached to the lower glass <NUM>, the lower glass <NUM> is located between the upper glass <NUM> and the foam <NUM>. The second through hole <NUM> is located in the foam <NUM>, and the second through hole <NUM> and the first through hole <NUM> are arranged coaxially.

It should be noted that in a region that is between the upper glass <NUM> and the lower glass <NUM> and that corresponds to the first through hole <NUM>, no support column <NUM> is provided, so as to avoid affecting the propagation of light.

In some implementations of this embodiment, the upper glass <NUM> may be provided with a first recess <NUM>.

After the upper glass <NUM> is attached to the polarizer <NUM>, because the upper glass <NUM> is in a suspended state at the first through hole <NUM> of the polarizer <NUM>, the upper glass <NUM> is prone to deformation at that position during use, and its main deformation is manifested as a depression there in a direction facing away from the polarizer <NUM>. In this case, a first groove <NUM> is formed on a side of the upper glass <NUM> facing the polarizer <NUM>, and a protrusion is formed on a side of the upper glass <NUM> facing the lower glass <NUM>. This depression has an effect that reflected light of incident light between the lower surface of the upper glass <NUM> and the upper surface of the lower glass <NUM> is likely to produce a thin film interference effect during use. This is mainly because of the spherical protrusion formed there by the upper glass <NUM>.

To improve this situation, the first recess <NUM> may be provided in the upper glass <NUM>, the first recess <NUM> is located on the side of the upper glass <NUM> facing toward the lower glass <NUM>, with a position of the first recess <NUM> corresponding to the position of the first through hole <NUM>. The provision of the first recess <NUM> in the upper glass <NUM> can change an angle of incident light passing through the upper glass <NUM> toward the lower glass <NUM>, thereby relieving the thin film interference effect.

Further, referring to <FIG> shows a state of the upper glass <NUM> with no depression. In some implementations of this embodiment, the first recess bottom <NUM> may alternatively be shaped into an arc surface, where the first recess bottom <NUM> is a recess bottom of the first recess <NUM>. The first recess bottom <NUM> is in an arc shape in a depressed direction of the first recess <NUM>, which means that an outer wall of the arc shape faces toward the first through hole <NUM>.

The provision of the first recess bottom <NUM> with an arc surface can further change, when the upper glass <NUM> is depressed, a shape of a surface of the upper glass <NUM> at the depression facing toward the lower glass <NUM>, thereby relieving the thin film interference effect.

In an optional implementation of this embodiment, before transforming the first recess bottom <NUM> into an arc surface, the shape of the first groove <NUM> formed by the depression of the upper glass <NUM> can be measured first, and then the first recess bottom <NUM> can be ground into the same shape as the first groove <NUM>. Referring to <FIG> shows a shape of the upper glass <NUM> with depression), when the first recess bottom <NUM> has the same shape as the first groove <NUM>, the depression of the upper glass <NUM> causes the first recess bottom <NUM> to deform and become substantially flat, which can better relieve the film interference effect.

In addition, referring to <FIG> shows a state of the lower glass <NUM> with no depression. A second recess <NUM> may also be provided in the lower glass <NUM>, the second recess <NUM> is located on a side of the lower glass <NUM> facing the upper glass <NUM>, and the second recess <NUM> is located at a position of the lower glass <NUM> corresponding to the second through hole <NUM>.

The lower glass <NUM> is located between the upper glass <NUM> and the foam <NUM>, and the foam <NUM> is provided with a second through hole <NUM> at a position corresponding to the first through hole <NUM>. The lower glass <NUM> is suspended at the second through hole <NUM> of the foam <NUM>. During use, the lower glass <NUM> is also prone to deformation at that position, and its main deformation is manifested as a depression there toward the upper glass <NUM>. In this case, a second groove <NUM> is formed on a side of the lower glass <NUM> facing away from the upper glass <NUM>, and a protrusion is formed on the side of the lower glass <NUM> facing the upper glass <NUM>, which is also likely to cause light reflected between the lower surface of the upper glass <NUM> and the upper surface of the lower glass <NUM> to produce a thin film interference effect. The provision of the second recess <NUM> can effectively improve the above situation, and when the second recess <NUM> cooperates with the first recess <NUM>, the thin film interference effect can be better relieved.

Further, in some implementations of this embodiment, the second recess bottom <NUM> may alternatively be shaped as an arc surface, where the second recess bottom <NUM> is a recess bottom of the second recess <NUM>. The second recess bottom <NUM> is in an arc shape in a direction from the lower glass <NUM> to the foam <NUM>, which means that an outer wall of the arc shape faces toward the second through hole <NUM>.

The provision of the second recess bottom <NUM> with an arc surface may further change, when the lower glass <NUM> is depressed, a shape of a surface of the lower glass <NUM> facing toward the upper glass <NUM> at the depression, thereby relieving the thin film interference effect.

The first recess <NUM> can be provided in a cylindrical shape, the second recess <NUM> can be provided in a spherical shape, the first recess <NUM> and the second recess <NUM> are coaxially arranged, and both the first recess <NUM> and the second recess <NUM> are coaxial with the first through hole <NUM>, so that four light-transmitting portions in the hole-punch screen, the first through hole <NUM>, the first recess <NUM>, the second recess <NUM>, and the second through hole <NUM>, are coaxially arranged, which facilitates passage of light.

In addition, a diameter of the first recess <NUM> may be equal to a diameter of the first through hole <NUM>, a diameter of the second recess <NUM> may be equal to a diameter of the second through hole <NUM>, and the diameter of the second through hole <NUM> is slightly smaller than the diameter of the first through hole <NUM>.

Because the first through hole <NUM> and the second through hole <NUM> may be different in size for different electronic devices, the first recess <NUM> and the second recess <NUM> can also be adjusted appropriately in size and depth for different electronic devices to achieve suitable results.

In an optional implementation of this embodiment, before transforming the second recess bottom <NUM> into an arc surface, the shape of the second groove <NUM> formed by the depression of the lower glass <NUM> can be measured first, and then the second recess bottom <NUM> can be ground into the same shape as the second groove <NUM>. Referring to <FIG> shows a shape of the lower glass <NUM> with depression), when the second recess bottom <NUM> has the same shape as the second groove <NUM>, the depression of the lower glass <NUM> causes the second recess bottom <NUM> to deform and become substantially flat, which can better relieve the film interference effect.

Because the first recess bottom <NUM> and the second recess bottom <NUM> are both flat when the upper glass <NUM> and the lower glass <NUM> are both depressed, the thin film interference effect can be substantially eliminated.

According to the invention, a contact area between the support columns <NUM> and the upper glass <NUM> is less than a contact area between the support columns <NUM> and the lower glass <NUM>. This is because incident light generally enters from the upper glass <NUM> toward the lower glass <NUM>, and therefore, reducing the contact area between the support columns <NUM> and the upper glass <NUM> can avoid formation of shadows.

Further, the support columns <NUM> may be arranged in a tapered shape, with a cross-sectional area of the support columns <NUM> gradually increasing in a direction of the upper glass <NUM> toward the lower glass <NUM>.

In some implementations of this embodiment, the polarizer <NUM> is attached to the light-transmitting cover <NUM> via an optical clear double-sided adhesive <NUM>. The attachment using the optical clear double-sided adhesive <NUM> has characteristics such as colorless and transparent, a light transmittance above <NUM>%, good bonding strength, capable of being cured at room temperature or medium temperature, and small curing shrinkage. In this embodiment, the optical clear double-sided adhesive <NUM> may be an OCA optical adhesive. Certainly, the OCA optical adhesive is only an optional implementation of this embodiment. In other implementations, the polarizer <NUM> and the light-transmitting cover <NUM> may alternatively be attached by another optical clear double-sided adhesive <NUM> with a light transmittance of above <NUM>%.

During assembly, the glass component <NUM> can be assembled first, and then the polarizer <NUM> and the upper glass <NUM> are attached together. The polarizer <NUM> and the glass component <NUM>, after being securely attached, can be placed on a flat surface so that the polarizer <NUM> is located uppermost, and then the first through hole <NUM> in the polarizer <NUM> is filled with optical clear glue. Because in this case the upper glass <NUM> is depressed to form a first groove <NUM> communicating with the first through hole <NUM>, when the optical clear glue is filled, a volume of the optical clear glue needs to be greater than a capacity of the first through hole <NUM>, so that the optical clear glue also fills up the first groove <NUM>, which can avoid a gap between the polarizer <NUM> and the upper glass <NUM>. Finally, the optical clear double-sided adhesive <NUM> is used to bond the light-transmitting cover <NUM> to the polarizer <NUM> to complete the assembly.

To avoid volume shrinkage of the optical clear glue after solidification, the light-transmitting cover can be attached to the polarizer <NUM> after the optical clear glue in the first through hole <NUM> is completely solidified and the upper surface of the solidified optical clear glue is flush with the upper surface of the polarizer <NUM>.

In some implementations of this embodiment, the optical clear glue can be solidified by UV light, and the optical clear double-sided adhesive <NUM> can also be used to bond the polarizer <NUM> and the upper glass <NUM>.

The first recess <NUM> and the second recess <NUM> can be made by a numerical control machine or by etching or another method.

A glass polishing process can be used for the upper glass <NUM> and the lower glass <NUM>, to polish the lower surface of the upper glass <NUM> and the upper surface of the lower glass <NUM>, so as to improve surface flatness of the upper glass <NUM> and the lower glass <NUM> and reduce a degree of depression of the upper glass <NUM> at the first through hole <NUM> and a degree of depression of the lower glass <NUM> at the second through hole <NUM>, thereby reducing interference with incident light.

An embodiment of the present invention further discloses an electronic device, which includes the foregoing hole-punch screen.

The electronic device provided in the present invention has the foregoing hole-punch screen. Because the first through hole <NUM> in the hole-punch screen is filled with the optical clear glue, no gap is created between the polarizer <NUM> and the glass component <NUM> as well as between the polarizer <NUM> and the light-transmitting cover <NUM>, thereby not affecting appearance and reliability testing, so that camera performance is optimized.

The electronic device in the embodiments of the present invention may be a smart phone, a tablet computer, an e-book reader, a game console, a smart watch, or the like. The embodiments of the present invention do not limit the specific type of the electronic device.

The foregoing embodiments of the present invention focus on the differences between the embodiments. As long as different features of improvement in the embodiments do not conflict, they can be combined to form more preferred embodiments. Further descriptions are omitted herein for the purpose of brevity.

Claim 1:
A hole-punch screen, comprising
a light-transmitting cover (<NUM>);
a polarizer (<NUM>), wherein the polarizer (<NUM>) is attached to the light-transmitting cover (<NUM>), the polarizer (<NUM>) is provided with a first through hole (<NUM>), and the first through hole (<NUM>) is filled with optical clear glue (<NUM>); and
a glass component (<NUM>), wherein the glass component (<NUM>) is attached to the polarizer (<NUM>), the polarizer (<NUM>) is located between the light-transmitting cover (<NUM>) and the glass component (<NUM>), and the glass component (<NUM>) is provided with a second through hole (<NUM>) at a position corresponding to the first through hole (<NUM>),
wherein the glass component (<NUM>) comprises:
upper glass (<NUM>), wherein the upper glass (<NUM>) is attached to the polarizer (<NUM>), the upper glass (<NUM>) is provided with a first recess (<NUM>) at a position corresponding to the first through hole (<NUM>), and the first recess (<NUM>) is located on a side of the upper glass (<NUM>) facing away from the polarizer (<NUM>);
lower glass (<NUM>), wherein the lower glass (<NUM>) is attached to the upper glass (<NUM>) via a frame adhesive (<NUM>);
support columns (<NUM>) located between the upper glass (<NUM>) and the lower glass (<NUM>); and
foam (<NUM>), wherein the foam (<NUM>) is located on a side of the lower glass (<NUM>) facing away from the upper glass (<NUM>), and the second through hole (<NUM>) is located in the foam (<NUM>),
wherein a contact area between the support columns (<NUM>) and the upper glass (<NUM>) is less than a contact area between the support columns (<NUM>) and the lower glass (<NUM>).