Low Inductance PDP Overview
The dedicated sustain pulse driving method may be applied to a modified panel structure to greatly reduce the inductance of the PDP.
Electrode inductance provides numerous deterrents to efficient operation. As is well known, inductance requires the application of a voltage across the inductance to induce a current. For any discharge device, the availability of voltage and current determines the characteristics of the discharge. Inductance inherently impedes current pulses induced by the discharge. Without current, the voltage across the discharge is reduced. The effect of inductance is therefore, reduced voltage and reduced current. Given this relationship it clear that full screen efficiency is going to be low.
Using the methods being developed, the inductance is reduced substantially, thus discharge currents can flow faster and with higher amplitudes.
Advantages:
- Electrode inductance is reduced drastically.
- Peak discharge currents can increase offering higher brightness and improved luminous efficacy.
- Reduced loading effects. Low electrode inductance allows for faster discharge currents to flow. This helps to maintain the discharge voltage across the pixel during the discharge. Higher brightness and efficacy results.
- Chassis sustain discharge currents are reduced by at least 50%. reductions below 50% are image dependent.
- The driving method is inherently efficient, reducing circuit losses substantially under dark screen conditions.
Other Embodiments:
The methods may be applied to various illumination devices including opposed discharge devices and ALiS type plasma displays.