84results about How to "Prevent misdischarge" patented technology

The present invention provides a drive apparatus and method for a plasma display panel, in which the drive apparatus and method improve contrast and prevent mis-discharge. According to the drive method, in a reset interval of a first sub-field, a voltage having an increasing ramp waveform is applied to scan electrodes during a first interval, and common electrodes are floated during a portion of the first interval such that a voltage of the common electrodes is increased to an initial voltage, which corresponds to a voltage applied to the scan electrodes and to a voltage applied to both sides of panel capacitors. Further, in a reset interval of a second sub-field, which exhibits a higher gray than the first sub-field, a voltage having an increasing ramp waveform is applied to the scan electrodes during a second interval, and floating the common electrodes during a portion of the second interval such that the voltage of the common electrodes is increased to another voltage, which is less than the initial voltage.

Glass for forming barrier ribs for e.g. a plasma display panel, which consists, as represented by mol % based on the following oxides, essentially of from 24 to 50% of SiO₂, from 13 to 23% of B₂O₃, from 10 to 32% of ZnO, from 3 to 20% of Li₂O, from 1 to 9% of Na₂O, from 1 to 15% of Al₂O₃, from 0 to 20% of MgO+CaO+SrO+BaO, and from 0 to 9% of Bi₂O₃, wherein ((B₂O₃+ZnO)—Al₂O₃) is at least 24 mol %; in a case where ZrO₂ is contained, its content is at most 2 mol %; and neither PbO nor F is contained.

The invention discloses a high-effect large-current combination wave generating circuit, which comprises a pulse voltage circuit, a pulse current circuit, a through-flow diode and a load, wherein the pulse voltage circuit comprises a first charging power supply, a first energy storage capacitor, a crowbar diode, a pulse transformer, a through-flow diode and an isolation capacitor; the pulse current circuit comprises a second charging power supply and a second energy storage capacitor. The circuit can produce a large current, and is simple in structure and low in cost.

A plasma display apparatus and a driving method thereof are provided. In the inventive plasma display apparatus and the driving method, when an image is displayed by dividing one subfield into a reset period, an address period, and a sustain period, a second sustain pulse applied in the sustain period of the one subfield has a sustain voltage applying time point different from that of a first sustain pulse.

The present invention relates to a plasma display apparatus and driving method thereof. The plasma display apparatus according to an embodiment of the present invention comprises a plasma display panel comprising a scan electrode and a sustain electrode, and a driver that controls one or more of sustain pulses supplied to the scan electrode and one or more of sustain pulses supplied to the sustain electrode to be overlapped with each other.

In a plasma display device, the application of at least one address signal to a cell receiving a scan signal is offset from the application of the scan signal. Such offset improves picture quality and/or reduces noise.

The present invention relates to a plasma display panel, and more particularly, to an apparatus for driving a plasma display panel and method thereof. The method for driving the PDP according to the present invention includes the steps of: setting a sustain period where a specific voltage is maintained for a predetermined time period between first and second periods whose voltage varies, in the ramp waveform, and supplying the ramp waveform to electrodes. The apparatus for driving the PDP according to the present invention includes an initialization driving circuit for generating a ramp waveform including a sustain period where a specific voltage is maintained for a predetermined time period between first and second periods whose voltage varies and supplying the ramp waveform to electrodes.

In a PDP having row electrode pairs and column electrodes formed on the front glass substrate placed parallel to the back glass substrate with a discharge in between, each of the column electrodes faces a central area between adjacent transparent electrodes of the row electrode in the row direction, and is placed in a position closer to the transparent electrode serving as its partner for initiating an address discharge than to the unrelated transparent electrode located on the opposite side of the column electrode.

The present invention relates to a plasma display apparatus, and more particularly, to a plasma display apparatus and driving method thereof, wherein a sustain waveform can be improved. According to the present invention, the plasma display apparatus includes a plasma display panel comprising a plurality of sustain electrode pairs wherein each of the sustain electrode pairs has a scan electrode and a sustain electrode, and a sustain waveform controller for controlling a rising time or a falling time of sustain waveforms supplied to at least one of the sustain electrode pairs according to a temperature of the plasma display panel. The sustain waveform controller controls a time corresponding to a time point at which a sustain discharge is generated, of the rising time and the falling time. The present invention improves a plasma display apparatus and driving method thereof. Accordingly, there is an effect in that erroneous discharge depending on a temperature of a plasma display panel can be prevented.

A plasma display device and a driving method thereof. For a plasma display device having an M electrode between X and Y electrodes, a sustain pulse is applied to the X and Y electrodes during an entire period, and a reset waveform and a scan pulse are applied to the M electrode. In addition, a scan pulse is applied to the M electrode while applying the sustain pulse to the X or the Y electrode. As a result, a gently decreasing reset waveform may be used so as to enhance contrast. Furthermore, driving circuits for driving the X and Y electrodes may be designed with the same scheme. In addition, an accurate address operation may be achieved.

The present invention relates to a plasma display apparatus and driving method thereof. In an embodiment of the present invention, a scan bias voltage that is controlled according to a mapped sub-field, a data load or an APL of each sub-field is supplied. In an embodiment of the present invention, a scan bias voltage is changed depending on a sub-field, an APL or a data load. Therefore, address margin can be improved, a stabilized operation can be provided, and an erroneous discharge and/or miswriting can be prevented.

The present invention discloses a wearable electrocardio dynamic full-true mapping intelligent defibrillator. The wearable electrocardio dynamic full-true mapping intelligent defibrillator comprises clothes, electrocardio patches, defibrillation electrode patches, a flexible energy storage device and a miniature embedded control center, and the electrocardio patches, the defibrillation electrode patches and the miniature embedded control center are detachably arranged on the clothes; and the flexible energy storage device supplies power to the miniature embedded control center and the defibrillation electrode patches and comprises a flexible water system battery and/or a flexible super capacitor. The wearable electrocardio dynamic full-true mapping intelligent defibrillator realizes long-term and continuous monitoring of 12-lead electrocardio-activity, can be used for diagnosis, prognosis evaluation and complication prevention treatments of cardiovascular diseases, sleep apnea syndromeand other diseases, can safely conduct defibrillation in time and can also effectively avoid discharge by mistake. The present invention also discloses the control method of the wearable electrocardio dynamic full-true mapping intelligent defibrillator.

A plasma display device which generates reset discharge in a reset period prior to an address period in the beginning subfields of a one-field display period, and applies two sustain pulses, which have rising timings different from each other by a predetermined period of time and have partly overlapping application periods, to row electrodes forming each row electrode pair after ending a sustain period in a last subfield of the one-field display period to thereby cause erasure discharge in discharge cells where sustain discharge has been caused in the last subfield.

Provided a plasma display apparatus. The apparatus includes a first electrode and a driver. The first electrode is formed at an upper substrate. The driver applies a sustain pulse to the first electrode. The driver applies a driving waveform whose, in one subfield, any one sustain pulse (SP1) has a longer falling time than another sustain pulse (SP2) applied earlier than the sustain pulse (SP1).

A plasma display panel is disclosed. More particularly, the present invention relates to a plasma display panel, which can improve discharge stability as well as brightness and efficiency. The plasma display panel according to the present invention includes transparent electrodes (ITO electrodes) spaced in parallel to each other at a predetermined distance; and metal electrodes each formed on the transparent electrodes (ITO electrodes) in parallel to the transparent electrodes (ITO electrodes) so that the respective transparent electrodes (ITO electrodes) are inclined toward the side where the transparent electrodes face.

A method of driving a plasma display panel including a plurality of scanning electrodes covered with a dielectric layer, and a plurality of sustaining electrodes covered with a dielectric layer, including the steps of (a) applying scanning pulses in time-division to the scanning electrodes in an addressing period in which a cell or cells emitting light is(are) selected, and applying sustaining pulses to the sustaining electrodes in a sustaining period for generating preliminary discharge and preliminary erasing discharge before the cell or cells emitting light is(are) selected, and (b) applying a serrate pulse to the scanning or sustaining electrodes when the preliminary erasing discharge is generated, the serrate pulse having an inclination smaller than 10 V/μs, wherein a period of time until the generation of the preliminary erasing discharge from the termination of the preliminary discharge is set shorter than 3T where T indicates a decay time constant of priming particles.

A plasma display panel to prevent misdischarge in a non-discharge region. The plasma display panel includes a first substrate and a second substrate facing the first substrate. A plurality of display electrodes are formed extending on the first substrate, and a plurality of address electrodes are formed extending on the second substrate and cross the display electrodes. Barrier ribs including a plurality of barrier rib members are positioned between the first substrate and the second substrate, and form a plurality of discharge cells and non-discharge regions. A phosphor is formed inside each of the discharge cells. Each of the non-discharge regions includes one of exposure regions where a part of one of the display electrodes is exposed. The exposure regions are placed alternately in an extending direction of the display electrodes.

A plasma display panel capable of preventing faulty discharge and non-uniform discharge by applying a uniform address voltage to all subpixels. This is done by neutralizing the negative surface potential of a zinc silicate green fluorescent material using YBO₃:Tb as a positive surface potential material on the partition walls between the electrodes. Also, the thickness of this YBO₃:Tb material and a lateral spacing between a scan electrode and the positive surface potential material are carefully selected to arrive at a design resulting in no faulty pixels. Grooves can also be formed in the tops of the partition walls so that the positive surface potential material filled therein does not mix with the neighboring flourescent material.