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US 11,776,519 B2Granted
Vibration generating device and display apparatus including the same
AssigneeLG Display Co., Ltd.
InventorsYuSeon Kho, Yong-Su Ham, YongWoo Lee
Life of this patent
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Abstract
A display apparatus includes a display panel displaying an image and a vibration generating device disposed on a rear surface of the display panel to vibrate the display panel. The vibration generating device includes a piezoelectric structure including a first region and a second region, the first region has a vibration characteristic of a first frequency, and the second region has a vibration characteristic of a second frequency which differs from the first frequency.
Claims38
A vibration generating device, comprising:
- a piezoelectric structure including a first region and a second region,
- wherein:
- each of the first region and the second region comprises:
- a plurality of first portions having a piezoelectric characteristic;
- and
- a second portion disposed between the plurality of first portions,
- a width of the first portion of the second region is less than a width of the first portion of the first region,
- the first region has a vibration characteristic of a first frequency,
- the second region has a vibration characteristic of a second frequency which differs from the first frequency,
- a side surface of the first region is directly connected to a side surface of the second region,
- the first region is configured as one or more of a haptic actuator, a speaker actuator, and a receiver actuator, and
- the second region is configured as a sensing actuator or a fingerprint sensing actuator.
9 more elements
A vibration generating device, comprising:
- a piezoelectric structure including a first region and a second region,
- wherein:
- the first region has a vibration characteristic of a first frequency,
- the second region has a vibration characteristic of a second frequency which differs from the first frequency,
- a first portion of the second region comprises one or more cavities,
- a second portion of the second region is disposed in the one or more cavities,
- the second region comprises an ultrasound oscillation region and an ultrasound reception region,
- one or more cavities of the first portion disposed in the ultrasound oscillation region have a first depth based on a quarter wavelength “λ/4” of a corresponding frequency in a medium of the first portion, and
- one or more cavities of the first portion disposed in the ultrasound reception region have a second depth based on a quarter wavelength “λ/4” of a corresponding frequency in a medium of the second portion.
6 more elements
A vibration generating device, comprising:
- a first region having a first vibration characteristic and configured to operate in a first vibration mode;
- and
- a second region having a second vibration characteristic and configured to operate in a second vibration mode,
- wherein each of the first region and the second region comprises:
- a plurality of first portions having a piezoelectric characteristic;
- and
- a second portion disposed between the plurality of first portions,
- wherein a width of the first portion of the second region is less than a width of the first portion of the first region,
- wherein the first region and the second region comprise insulating materials having different Young's modulus,
- wherein a side surface of the first region is directly connected to a side surface of the second region,
- wherein the first region is configured as one or more of a haptic actuator, a speaker actuator, and a receiver actuator, and
- wherein the second region is configured as a sensing actuator or a fingerprint sensing actuator.
9 more elements
A vibration generating device, comprising:
- a piezoelectric structure including a first region and a second region,
- wherein each of the first region and the second region comprises:
- a plurality of first portions having a piezoelectric characteristic;
- and
- a second portion disposed between the plurality of first portions,
- wherein a width of the first portion of the second region is less than a width of the first portion of the first region,
- wherein the first region and the second region are individually driven for different functions, and the second region is driven for image sensing,
- wherein a side surface of the first region is directly connected to a side surface of the second region,
- wherein the first region is configured as one or more of a haptic actuator, a speaker actuator, and a receiver actuator, and
- wherein the second region is configured as a sensing actuator or a fingerprint sensing actuator.
7 more elements
Dependencies are inferred from the claim text.