Abstract: A piezoelectric thin film filter includes: a substrate comprising a parallel cavity constituting the parallel resonator and a series cavity constituting the series resonator; a parallel lower electrode formed on a parallel substrate portion constituting the parallel resonator in the substrate; a series lower electrode formed on a series substrate portion constituting the series resonator in the substrate; a piezoelectric layer formed on the substrate, the parallel lower electrode, and the series lower electrode; and an upper electrode formed on the piezoelectric layer, wherein the series lower electrode comprises a first series lower electrode formed on a portion where the series cavity is formed in the series substrate portion, and a second series lower electrode formed on a portion where the series cavity is not formed in the series substrate portion, wherein a thickness of the first series lower electrode is less than or equal to a predetermined thickness.

Abstract: Disclosed is an air-gap type film bulk acoustic resonator (FBAR) including a substrate including an air-gap portion which has a substrate cavity and is formed in a top surface, a lower electrode formed above the substrate, a piezoelectric layer formed above the lower electrode, and an upper electrode formed above the piezoelectric layer and having one side on which an electrode edge is formed to be adjacent to a vertical virtual boundary of a sidewall of the air-gap portion. Here, the piezoelectric layer includes a piezoelectric cavity formed below the electrode edge.

Abstract: A driving circuit for a liquid crystal display and the liquid crystal display are disclosed. The liquid crystal display includes a display panel for displaying an image and a driving voltage generating circuit connected to the display panel, wherein the driving circuit includes a DC-DC converter for converting an input voltage level of a power input terminal to drive the display panel and outputting it as a driving voltage, a power line for connecting the power input terminal and the DC-DC converter, a first diode connected to a first node of the power line, a driving voltage terminal connected to an output terminal of the DC-DC converter, and a second diode connected to the first diode and the driving voltage terminal, wherein the power line includes a second node connected to a ground electrode between the first diode and the second diode.

Abstract: A backlight assembly, a display apparatus having the backlight assembly, and a method of assembling the backlight assembly are disclosed for embodiments. For example, a backlight assembly may include a receiving container which includes a first receiving member that receives a lamp and a portion of a light guide plate and a second receiving member that receives a remaining portion of the light guide plate. A reflection sheet is disposed between the light guide plate and the receiving container and elongated to cover the lamp. An adhesive is disposed between the reflection sheet and the receiving container and includes a heat-bondable material to adhere the reflection sheet to the receiving container when heat is applied thereto. Accordingly, the reflection sheet may be prevented from being wrinkled due to heat generated from the lamp, thereby enhancing assemblability of the backlight assembly.

Abstract: A backlight assembly, a display apparatus having the backlight assembly, and a method of assembling the backlight assembly are disclosed for embodiments. For example, a backlight assembly may include a receiving container which includes a first receiving member that receives a lamp and a portion of a light guide plate and a second receiving member that receives a remaining portion of the light guide plate. A reflection sheet is disposed between the light guide plate and the receiving container and elongated to cover the lamp. An adhesive is disposed between the reflection sheet and the receiving container and includes a heat-bondable material to adhere the reflection sheet to the receiving container when heat is applied thereto. Accordingly, the reflection sheet may be prevented from being wrinkled due to heat generated from the lamp, thereby enhancing assemblability of the backlight assembly.

Abstract: A driving voltage circuit for a liquid crystal display and a liquid crystal display using the driving voltage circuit. A liquid crystal display according to the present invention includes a liquid crystal display panel for displaying an image and a driving voltage generating circuit connected to the display panel, wherein the driving voltage generating circuit includes a DC-DC converter for converting an input voltage level of a power input terminal to drive the liquid crystal display panel and outputting it as a liquid crystal driving voltage, a power line for connecting the power input terminal and the DC-DC converter, a first diode connected to a first node of the power line, a liquid crystal driving voltage terminal connected to a first output terminal of the DC-DC converter, and a second diode connected to the first diode and the liquid crystal driving voltage terminal, wherein the power line includes a second node connected to a ground electrode between the first diode and the second diode.