Abstract:
A plasma display device which can provide stable discharging operations irrespective of variations in temperature. A load capacitor of a plasma display panel is charged or discharged via a switching element and a resistor element with one end to which a predetermined potential is supplied thereby creating a gradually varying waveform of a drive pulse, in which the switching element is controlled by an operational amplifier. That is, the operational amplifier controls the switching element based on a control voltage according to the difference between the potential at the other end of the resistor element and the potential of a gradually varying waveform generation signal for promoting the gradually varying waveform to be generated.
Abstract:
A drive apparatus for driving a display panel having a plurality of row electrode groups each of which includes a plurality of row electrodes, and a plurality of column electrodes arrayed in the direction intersecting with each row electrode of the plurality of row electrode groups to form display cells at the intersection points. The drive apparatus comprises a controller for generating a control signal for each of the row electrode groups, and a row electrode drive circuit for generating a drive pulse in response to the control signal and supplying the pulse to each row electrode of each of the row electrode groups. The control signal is delayed when being supplied to the drive circuit for each of the row electrode groups.
Abstract:
A drive circuit of plasma display panel (PDP) unit including at least a pair of electrodes and discharge cells connected thereto, further comprises a first path having a first switch and a first coil for applying voltage to the discharge cells; a second path having a second switch and a second coil for expelling the voltage applied to the discharge cells; and electric charge accumulating devices connected to the first path and the second path, wherein the inductance value of the second coil is larger than the inductance value of the first coil.
Abstract:
The semiconductor device includes a plurality of semiconductor packages stacked on one another. Each semiconductor package includes a main current electrode terminal disposed in a case section of the semiconductor package, the main current electrode terminal being exposed outside the case section to be electrically connected to an external power supply. The main current electrode terminal extends in the stack direction of the semiconductor packages, and embedded in the case section at a surface portion thereof facing an external surface of the case section. Both end surface portions of the main current electrode terminal in the stack direction respectively reach end surface portions of the case section in the stack direction so that the main current electrode terminals of each adjacent two of the semiconductor packages are in contact with each other when the semiconductor packages are stacked on one another in the stack direction.
Abstract:
The semiconductor device has a unit stack body including a plurality of units stacked on one another. Each unit includes a power terminal constituted of a lead part and a connection part. The connection part is formed with a projection and a recess. When the units are stacked on one another, the projection of one unit is fitted to the recess of the adjacent unit, so that the power terminals of the respective unit are connected to one another.
Abstract:
It is an object of the invention to provide an improved flat panel type display apparatus allowing a low cost and a simplified wiring process. First and second terminal groups adjacent to each other as well as a third terminal group separated from the first and second terminal groups and are formed on the outside edge of a rear glass substrate of display section main body of the display apparatus. The first terminal group is comprised of connection terminals formed with wiring patterns connected to display electrodes. The second and third terminal groups and are connected to each other by predetermined wiring patterns. On connection end of TCP equipped with a driver IC, there are formed connecting terminals corresponding to the first and second terminal groups.
Abstract:
A driving apparatus for a display panel having a plurality of row electrodes and a plurality of column electrodes intersecting the row electrodes, for generating a drive pulse to be applied to each of the electrodes. The driving apparatus includes a DC power supply for generating a DC voltage and having a positive terminal and a negative terminal one of which is applied with a reference potential, a coil having one end connected to the other terminal of the DC power supply, and a switching arrangement for alternately making a connection and disconnection between the one end of the coil and the other terminal of the DC power supply. At the time the alternate switching is performed, a potential change appearing on the other end of the coil is used as the drive pulse.
Abstract:
A plasma display device for producing a display using an address period in which paired row electrodes are applied with a scan pulse, and column electrodes are simultaneously applied with pixel data pulses to select light emitting pixels and non-light emitting pixels, and a discharge sustaining voltage in which the paired row electrodes are applied with a sustain pulse to sustain a sustaining discharge for light emitting pixels and non-light emitting pixels, wherein the sustain pulse has a waveform exhibiting gentle rising or falling at a leading edge thereof, as compared with the scan pulse, and the sustaining discharge is limited in a region near a discharge gap formed between paired row electrodes within a unit light emitting region.
Abstract:
Application timing of driving pulses for a PDP is controlled so that a flow direction of a discharge current which flows between a first row electrode and a second row electrode of each of row electrode pairs belonging to odd numbered display lines due to the electrical discharge is opposite to a flow direction of a discharge current which flows between a first row electrode and a second row electrode of each of row electrode pairs belonging to even numbered display lines. Furthermore, an impedance of a current channel for the discharge current which flows between the row electrode pair belonging to the odd numbered display line and the electrode driving means is made substantially the same as an impedance of a current channel for the discharge current which flows between the row electrode pair belonging to the even numbered display line and the electrode driving means.
Abstract:
The plasma display panel (PDP) unit of the present invention comprises a PDP drive circuit for supplying drive power to a display panel and a control portion for controlling the drive power. The control portion includes a power correction value generating circuit for generating a power correction value and the PDP drive circuit contains a voltage adjusting circuit for outputting the drive power based on the power correction value.