This application claims the priority benefit of Chinese application serial No. 202110698689.X, filed on Jun. 23, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of the specification.
The disclosure relates to an electronic device including an infrared light source.
An infrared ray is also referred to as infrared light and has properties such as reflection, refraction, scattering, interference, and absorption. Any substance with a specific temperature (higher than absolute zero) radiates infrared rays. An infrared ranging sensor detects distances of obstacles by using a principle that infrared signals have different reflection intensities when encountering the obstacles at different distances. With the rapid development of communication technologies, mobile phones have become indispensable carry-on articles in people's daily life. Infrared ranging technologies are combined with the mobile phone, to improve functions and diversity of the mobile phone.
However, an infrared light source is generally disposed adjacent to a display panel. Especially, in a case that the infrared light source is matched with an organic electroluminescence display panel, the organic electroluminescence display panel is easily affected by the infrared light source to cause water ripples to flicker at edges of the display panel.
According to an aspect, an electronic device is provided. The electronic device includes a display panel, an infrared light source, and an infrared cutoff layer. The display panel includes a display surface, a back surface opposite to the display surface, and a side surface connecting the display surface and the back surface. The infrared light source is disposed adjacent to the side surface of the display panel and is configured to emit infrared light. The display panel includes an overlapping region in which the infrared light source overlaps with the side surface as viewed from a side view. The infrared cutoff layer is attached to the side surface and the back surface of the display panel, and covers at least the overlapping region and an extension region in which the overlapping region extends respectively in a transverse direction and toward the back surface by a preset distance.
Based on the above, in the electronic device of the disclosure, an infrared cutoff layer is attached to a side surface and a back surface of a display panel, and is caused to cover at least a region in the display panel in which an infrared light source overlaps with the display panel (as viewed from a side view) and an extension region in which the overlapping region extends respectively in a transverse direction and toward the back surface by a preset distance. Therefore, the impact of infrared light emitted by the infrared light source on the display panel is prevented, thereby improving the display quality of the electronic device.
The accompanying drawings are included to provide further understanding of the invention, and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate embodiments of the invention and explain the principles of the invention in combination with the description.
References will be made in detail to exemplary embodiments of the invention, and examples of exemplary embodiments are described in the accompanying drawings. Whenever possible, the same element symbols are used in the accompanying drawings and descriptions to represent the same or similar parts.
In an embodiment, the infrared light source 120 is disposed adjacent to the side surface S3 of the display panel 110 and is configured to emit infrared light. In an embodiment, the infrared light source 120 is an infrared light-emitting diode. In some embodiments, the electronic device 100 includes an infrared sensor, and the infrared light source 120 is used as an infrared signal source of the infrared sensor. The infrared light emitted by the infrared light source 120 has properties such as reflection, refraction, scattering, interference, and absorption. Any substance with a specific temperature (higher than absolute zero) radiates infrared rays. Therefore, the infrared sensor detects distances of obstacles by using a principle that infrared signals have different reflection intensities when encountering the obstacles at different distances. In another embodiment, the electronic device 100 includes an infrared camera, and the infrared light source 120 is used as a main light source of the infrared camera. The infrared camera is a device that converts a temperature distribution image of a target object into a video image mainly by detecting infrared radiation of the target object and performing photoelectric conversion, signal processing, and the like. In this embodiment, a specific distance is maintained between the infrared light source 120 and the side surface S3 of the display panel 110, and a light-emitting direction of the infrared light source 120 is the same as a light-emitting direction of the display panel 110 (in an embodiment, the directions are both upward). In some embodiments, the infrared light source 120 is disposed on a circuit board 122 (in an embodiment, a printed circuit board).
As shown in
In an embodiment, the infrared cutoff layer 130 covers at least an overlapping region 132 and an extension region 134 of the display panel 110. When viewed from a side view, the overlapping region 132 is a region in which the infrared light source 120 overlaps with the side surface S3 of the display panel 110. The extension region 134 is a region in which the overlapping region 132 extends respectively in a transverse direction and toward the back surface by a preset distance D1. In an embodiment, the preset distance D1 is generally in a range of 5 millimeters (mm) to 15 mm. In an embodiment, the preset distance D1 is generally about 10 mm. Specifically, the infrared light source 120 overlaps with the side surface S3 of the display panel 110 as viewed from the side view. Therefore, the overlapping region 132 is located on the side surface S3 of the display panel 110 and corresponds to the infrared light source 120, and the extension region 134 is a region in which the overlapping region 132 respectively extends in the transverse direction (respectively leftward and rightward) and toward the back surface by the preset distance D1 of about 5 mm to 15 mm. In this case, such a configuration that the infrared cutoff layer 130 covers at least the overlapping region 132 and the extension region 134 of the display panel 110 effectively reduces the impact of the infrared light emitted by the infrared light source 120 on the display panel 110.
In some embodiments, as shown in
Referring to
Referring to
In some embodiments, the electronic device 100b further includes a light blocking structure 160 disposed between the display panel 110 and the infrared light source 120. In this embodiment, the light blocking structure 160 is, in an embodiment, a retaining wall structure which blocks the transmission of the infrared rays, is located below the touch panel 150, and is disposed between the display panel 110 and the infrared light source 120. In an embodiment, there is a gap between an upper end of the light blocking structure 160 and the lower surface S4 of the touch panel 150. In some embodiments, a height of the light blocking structure 160 is slightly greater than a height of the infrared light source 120. In other words, the upper end of the light blocking structure 160 is slightly higher than an upper end of the infrared light source 120. In some embodiments, the material of the light blocking structure 160 includes an appropriate light blocking material such as foam, silica gel, or plastic. Definitely, the light blocking structure is alternatively made of various other materials as long as the materials have the effect of blocking the infrared light. In such a configuration, the infrared cutoff layer 130 extends along the lower surface S4 of the touch panel 150 to cover an upper portion of the light blocking structure 160. The light blocking structure 160 disposed between the display panel 110 and the infrared light source 120 is used to match the infrared cutoff layer 130, to further prevent the infrared light emitted by the infrared light source 120 from affecting the display panel 110. It is to be noted that, because the infrared cutoff layer 130 extends to cover the upper portion of the light blocking structure 160, a top view of the electronic device 100b is the same as or at least similar to the top view shown in
To sum up, in the electronic device of the disclosure, an infrared cutoff layer is attached to a side surface and a back surface of a display panel, and is caused to cover at least a region in the display panel in which an infrared light source overlaps with the display panel (as viewed from a side view) and an extension region in which the overlapping region extends respectively in a transverse direction and toward the back surface by a preset distance. Therefore, the impact of infrared light emitted by the infrared light source on the display panel is prevented, thereby improving the display quality of the electronic device.
Finally, it is to be noted that the foregoing embodiments are merely used for describing technical solutions of the invention, but are not intended to limit the invention. Although the invention is described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art is to understand that, modifications are still made to the technical solutions in the foregoing embodiments, or equivalent replacements are made to some or all of the technical features, and such modifications or replacements will not cause the essence of corresponding technical solutions to depart from the scope of the technical solutions in the embodiments of the invention.
Number | Date | Country | Kind |
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202110698689.X | Jun 2021 | CN | national |