Cha Keun Yoon

Vacuum ultraviolet emission characteristics from He–Ne–Xe gas discharge in an alternating current plasma display panel cell

We measured the time integrated vacuum ultraviolet (VUV) emission spectra of He–Ne–Xe gas mixture from a surface type alternating current (ac) plasma display panel cell. The measured emission lines are the resonance line (147 nm) from Xe*(1s4), the first continuum (150 nm) and the second continuum (173 nm) from Xe dimer excited states. The relative intensities of VUV spectral lines from Xe* and Xe2* are dependent on the He/Ne mixing ratio as well as the Xe partial and total pressure. The intensity of 147 nm VUV increases with the Ne content increase and Xe2* molecular emission increases with the He content increase. Infrared (IR) spectra and the time variation of VUV were measured to explain the reaction pathway and the effect of the mixing ratio of He/Ne on the spectral intensity. A detailed study for the decay time shows that the decay time of 147 nm has two time constants and the radiation of 150 and 173 nm results mainly from Xe*(1s5). The IR spectra shows that the contribution from Xe**(>6 s) to Xe*(...

Two-dimensional modeling of a surface type alternating current plasma display panel cell: discharge dynamics and address voltage effects

To improve the luminance and efficiency of an alternating current plasma display panel, the direct measurement of infrared and vacuum ultra violet (VUV) imaging is performed to study discharge dynamics. Images show two emission regions. One is the cathode glow and the other is the anode glow. In the course of discharge cycle, the cathode glow propagates toward the outer edge of the electrode, while the anode glow does not propagate. We developed a two-dimensional model to simulate the time evolution of the discharge dynamics. We learned from the modeling results that the dominant role for the propagation of the cathode glow is the ion transport and the electron transport for the anode glow. In addition, the effects of address voltage on the luminance and efficiency are investigated during the sustain period. When the address electrode is floating, VUV output is larger than that of biased conditions, but the efficiency decreases slightly. The comparison of 100 V with 0 V bias shows that biased voltage does not affect the luminance and efficiency at the steady state.

Characteristics of vacuum ultraviolet emission from a surface discharge type alternating current plasma display panel cell

We have measured the time variation of 147 nm vacuum ultraviolet (VUV) resonance emission as well as the continuum such as 152 and 173 nm VUV and the two-dimensional images of 147 nm VUV from the He–Xe discharge in a surface discharge type single alternating current (ac) plasma display panel (PDP) cell using an image intensified charge-coupled device camera. A detailed measurement of the resonance radiation exhibits a fast rising to its peak and decay with multiple time constants. The changes in decay time constants, relative intensities of resonance, and dimer radiation change with the total gas pressure as well as the Xe partial pressure implies that collisional excitation, deexcitation, and interlevel transition play important roles in determining the VUV emission characteristics. The two-dimensional images show that a weak, broad VUV emission comes out from the cathode area with a strong, narrow emission from the anode area. We have solved the He–Xe discharge reaction equations together with the two-d...

Spatio-temporal characteristics of infrared and vacuum ultraviolet emission from a surface discharge type AC plasma display panel cell with He-Xe and Ne-Xe gas mixture

The spatio-temporal variations of 147 nm, 173 nm, and infrared emission images were obtained from a surface discharge type AC plasma display panel (PDP) cell with the He-Xe and Ne-Xe mixture. The differences in 147 nm, 173 nm, and infrared emission characteristics between He-Xe and Ne-Xe gas mixture were observed and explained by the differences in the xenon ion mobility and dimer reaction coefficients in two cases.

Analysis of He-Xe Discharge Kinetics in an AC PDP Cell

We measured the time variation of 147nm VUV Xe*(3P1) resonance emission as well as the continuum from the He-Xe discharge in a single surface discharge type AC PDP cell using an image intensified CCD camera. A detailed measurement of the resonance radiation exhibits a strong pressure broadening, fast rising to its peak and decay with multiple time constant. The decay time constants, relative intensities of resonance and dimer radiation change with the total gas pressure as well as the Xe content which implies that the collisional excitation, deexcitation and interlevel transition play important role in determining the VUV emission characteristics. We solved the He-Xe discharge reaction equations together with the 2-dimensional multi-fluid equations for electron and ions to explain the experimental results and elucidate the dominant kinetic pathways which lead to the VUV emission in the AC PDP cells.

Spatio-Temporal Variation of VUV and IR Emission from Surface Discharge Type AC PDP Cell with He-Xe and Ne-Xe

The spatio-temporal variations of 147nm, 173nm, and IR emission images were obtained from He-Xe and Ne-X surface discharge type AC PDP cell. Differences in the 147nm, 173nm, and IR emission characteristics between He-Xe and Ne-Xe gas mixture were observed and explained by the difference of Xe mobility and dimer reaction coefficients in two cases.

Time-resolved imaging of VUV emission from a He-Xe micro surface discharge

A direct observation of two-dimensional, time dependent behavior of 147 nm and 173 nm vacuum ultra violet emission from a single surface discharge type AC plasma display panel cell were obtained using a gated, image intensified charge-coupled device (ICCD). The images on the ICCD are formed by a pinhole. The two lines show similar spatial profile but quite different temporal behavior.

High luminous efficiency characteristics of alternating current plasma display panel with delta color arrayed, enclosed barrier rib structure

The luminous efficiency characteristics of a new alternating current plasma display panel (ac PDP) structure with the segmented electrodes in delta color arrayed subpixels with enclosed barrier ribs (SDE) are investigated. The SDE structure which has a 4:3 horizontal to vertical cell dimension ratio showed higher luminance and luminous efficiency increment characteristics as the Xe partial pressure increased compared to those of the conventional stripe type with 1:3 ratio for a given resolution. The luminance and luminous efficiency increases with the electrode width, which provides a means to change the color temperature for the full color panel without using other method such as the subpixel size change. The driving feasibility of SDE structure panel with various electrode widths is confirmed by demonstrating the existence of sufficient driving voltage margin

P‐60: The Effects of Barrier Ribs on Address and Sustain Discharges in PDP Studied by Three‐dimensional Simulation

Three-dimensional fluid code was used to investigate the effect of barrier ribs on the addressing and the sustaining discharges. The barrier rib height and the cell pitch are the main parameters used in this study. The lower barrier rib height allows the faster addressing but requires the higher sustain voltage, while the wider cell pitch allows the lower address and sustain voltages. We used the voltage transfer curve to analyze the sustain period.

Spatio‐temporal variation of VUV and IR emissions from surface‐discharge‐type ACPDP cell

— The spatio-temporal variations of 147-nm, 173-nm, and IR emission images were obtained from He-Xe and Ne-Xe surface-discharge-type ACPDP cells. Differences between the 147-nm, 173-nm, and IR emission characteristics between He-Xe and Ne-Xe gas mixtures were observed and explained by the difference of Xe mobility and dimer reaction coefficients in two cases.