Abstract:
A lighting device for a display device, includes a light source and a chassis arranged to cover the light source. The chassis is defined by a plate-shaped member having a reticulated structure. Thus, the lighting device for a display device, capable of preventing or suppressing beat tones generated on a lamp housing member, is provided without increasing the thickness of the device and with a simple structure.
Abstract:
A lighting device 12 for a display device, according to the present invention, includes a light source 17 and a chassis 14 arranged to cover the light source 17. The chassis 14 is formed of a plate-like member 53 having a reticulated structure 55. Thus, the lighting device for a display device, capable of preventing or suppressing beat tones generated on a lamp housing member, is provided without increasing the thickness of the device and with a simple structure.
Abstract:
A noise preventing film includes a base layer, a conductive layer stacked on the base layer, a noise preventing layer stacked on the conductive layer, and a noise preventing particle distributed in the noise preventing layer. An LCD device includes the noise preventing film, and a method for manufacturing the noise preventing film is provided.
Abstract:
An optical modulator includes a crystal structure that exhibits polaritonic or excitonic behavior. A shock wave propagates through the crystal structure so as to optically modulate and manipulate a light signal propagating in the crystal structure.
Abstract:
A device for damping the vibrations of an elongated, substantially rectangular crystal in response to an applied high voltage electrical field comprises a pair of dielectric panes which are impedance matched with the crystal and are attached to opposite sides thereof. As attached to the crystal, each of the panes is disposed at the periphery of the electrical field, and an aluminum block is attached to each of the panes on a surface which is opposite from the crystal. The mass of aluminum blocks, and the texture of their exposed outer surfaces cooperate to mechanically dampen the acoustic vibrations transmitted from the crystal through the panes. Additionally, the rectangular dimensions of the crystal are chosen to delay the propagation of acoustic waves from the surfaces of the crystal to its center. This is done in order to preserve an optical window through the crystal for a period of time during which this window, at the center of the crystal, experiences only the electro-optical effect caused by an applied electrical field and does not experience the "ringing" which is caused by acoustic waves.
Abstract:
An electro-optic device, which processes by modulating, switching or gating, a light beam in response to an electrical signal utilizes an electro-optic crystal through which the beam to be processed passes. An electric field is generated by pulses which modulate the crystal's index of refraction and also causes piezoelectric ringing in the crystal. Acoustic energy absorbing material is coupled to the crystal for absorbing the piezoelectrically generated acoustic waves propagating perpendicularly to the applied electric field direction which has been found to be the dominant acoustic mode affecting the birefringence of the crystal and causing the ringing. The field is applied in short pulses (of the order of 10 nsec or less) thereby reducing lower frequencies in the acoustic energy spectrum thereby facilitating the absorption of the ringing energy. The modulation or gating of the optical beam may be carried out at high repetition rates which have heretofore limited the use of electro-optic devices to repetition rates of approximately 1 KHz or less.
Abstract:
Apparatus is disclosed which utilizes an acoustic impedance matching technique to substantially reduce the occurrence of acoustic resonances in an electro-optic crystal. In one embodiment, the acoustic resonance damping apparatus is adapted to apply an electric field to the electro-optic crystal. Several additional embodiments are disclosed.