Sound inspection method and inspection apparatus for display device including sound generator
AssigneeSamsung Display Co., Ltd.
InventorsKee Yong Kim, Chang Yeob Kim, Jung Hun Sin, Han Su Cho
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Abstract
A sound inspection method of a display device and a sound inspection device including preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel, placing a vibration sensor on a second surface opposite to the first surface of the display panel, vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel; and determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region.
Claims26
A sound inspection method of a display device, the sound inspection method comprising:
- preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel;
- placing a vibration sensor on a second surface opposite to the first surface of the display panel;
- vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel;
- removing the vibration of the vibration sensor included in a masking frequency region;
- and
- determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region.
A sound inspection method of a display device, the sound inspection method comprising:
- preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel;
- placing a vibration sensor on a second surface opposite to the first surface of the display panel;
- vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel;
- determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region;
- vibrating the sound generator at a second reference frequency, vibrating the display panel, and sensing a second vibration of the vibration sensor that vibrates along with the vibration of the display panel when a frequency of a first vibration of the vibration sensor is included in the first threshold frequency region;
- and
- determining whether a frequency of the second vibration of the vibration sensor is included in a second threshold frequency region.
A sound inspection device of a display device including a display panel and a sound generator disposed on a first surface of the display panel, the sound inspection device comprising:
- a support frame configured to support the display panel;
- a vibration sensor spaced apart from the support frame;
- a voltage sensing unit configured to sense a vibration of the vibration sensor;
- and
- a determination unit configured to remove the vibration of the vibration sensor included in a masking frequency region, compare a frequency of the vibration of the vibration sensor sensed by the voltage sensing unit to a threshold frequency region, and determine whether the sound generator of the display device is a good product or a defective product.
Dependencies are inferred from the claim text.