Electronic devices including colored glass-based components
Components formed from colored glass-based materials are disclosed. A cover member formed from a colored glass-based material may be positioned over one or more device components such as a component of a wireless communication or charging system. The cover member may have optical properties, electrical properties, magnetic properties, and/or mechanical properties compatible with the requirements of the one or more device components. In some cases, different portions of the cover member may be configured to have different optical and/or electrical properties.
1 . An electronic device, comprising:
a display; and
an enclosure comprising:
an enclosure component;
a front cover assembly coupled to the enclosure component and comprising a front cover member positioned over the display;
a rear cover assembly coupled to the enclosure component and including:
a rear cover member formed from a glass material including metal nanoparticles configured to impart color to the glass material and having a dielectric constant from 5 to 7 in a frequency band from 5 GHz to 40 GHZ, the rear cover member comprising:
a first portion defining a first thickness and characterized by a first color; and
a second portion defining a second thickness, greater than the first thickness, and characterized by a second color, different from the first color; and
a coating disposed along an interior surface of the rear cover member.
2 . The electronic device of claim 1 , wherein:
the electronic device further comprises a rear-facing camera array comprising an array of camera modules;
the second portion of the rear cover member defines an array of through-holes; and
each camera module of the array of camera modules extends into a respective through-hole of the array of through-holes.
3 . The electronic device of claim 1 , wherein the second portion includes a periphery of the rear cover member.
4 . The electronic device of claim 1 , wherein the electronic device further comprises an RF antenna assembly configured to operate in the frequency band.
5 . The electronic device of claim 1 , wherein:
the first portion has an L* value of at least 90; and
an L* difference between the first portion and the second portion is at least 10.
6 . The electronic device of claim 1 , wherein a chroma difference between the second portion and the first portion is at least 10.
7 . The electronic device of claim 6 , wherein:
a percentage difference between the second thickness and the first thickness ranges from 50% to 200%; and
the chroma difference between the second portion and the first portion is from 15 to 50.
8 . An electronic device comprising:
an enclosure comprising:
an enclosure component defining a side surface of the electronic device;
a front cover assembly coupled to the enclosure component, defining a front surface of the electronic device, and comprising a front cover member; and
a rear cover assembly coupled to the enclosure component, defining a rear surface of the electronic device, and comprising:
a rear cover member formed from a colored glass material and having a dielectric constant from 5 to 6.5 in a frequency band from 5 GHz to 40 GHZ, at least a portion of the rear cover member having:
an average transmission for visible light greater than 75%; and
a chroma value of at least 1.75; and
an optical coating disposed along an interior surface of the rear cover member;
a display positioned below the front cover assembly; and
a transceiver component of a wireless communication system positioned below the rear cover assembly.
9 . The electronic device of claim 8 , wherein:
the portion of the rear cover member is a first portion having a first thickness; and
a second portion of the rear cover member has:
a second thickness, greater than the first thickness;
an average transmission for the visible light less than the average transmission for visible light of the first portion; and
a chroma value greater than the chroma value of the first portion.
10 . The electronic device of claim 9 , wherein the chroma value of the second portion of the rear cover member is at least 25.
11 . The electronic device of claim 8 , wherein at least a portion of the optical coating is characterized by an L* value of 90 or more, an a* value having a magnitude less than 0.5, and a b* value having a magnitude less than 1.
12 . The electronic device of claim 8 , wherein the optical coating further includes a multilayer interference stack comprising multiple dielectric layers configured to produce optical interference.
13 . The electronic device of claim 8 , wherein the transceiver component is a directional antenna configured to transmit wireless signals and a frequency band of the directional antenna is between 25 GHz and 39 GHz.
14 . The electronic device of claim 8 , wherein the colored glass material comprises a transition metal element incorporated into a glass phase of the colored glass material.
15 . An electronic device comprising:
a display;
a rear-facing camera array comprising an array of camera modules; and
an enclosure comprising:
an enclosure component defining a side surface of the electronic device;
a first cover assembly defining a front surface of the electronic device, the first cover assembly comprising a first cover member positioned over the display; and
a second cover assembly defining a rear surface of the electronic device and comprising:
a second cover member formed of a colored glass, a first portion of the second cover member having a first L* value and a second portion of the second cover member having a second L* value, less than the first L* value and defining an array of through-holes, each camera module of the array of camera modules extending into a respective through-hole of the array of through-holes; and
a coating disposed along an interior surface of the second cover member.
16 . The electronic device of claim 15 , wherein the second portion of the second cover member has a transmission for visible light less than 75%.
17 . The electronic device of claim 15 , wherein a hue difference (ΔH*) between the first portion and the second portion is less than 15 degrees.
18 . The electronic device of claim 17 , wherein:
the first portion of the second cover member has a first hue; and
the coating is configured so that a corresponding portion of the second cover assembly has a second hue different from the first hue.
19 . The electronic device of claim 15 , wherein:
the first portion of the second cover member has a thickness greater than 0.3 mm and less than 0.75 mm; and
the second portion of the second cover member has a thickness greater than 1 mm and less than or equal to 2 mm.
20 . The electronic device of claim 15 , wherein the colored glass is an ion exchanged alkali aluminosilicate glass.