Akira Tokai

35.4: New Approach for Wall Display with Fine Plasma Tube Array Technology

A wall-sized emissive full-color display with fine plasma tubes using three electrodes is proposed. Each tube has an internal MgO overcoat and a phosphor layer. The experimental display was fabricated and the results will be presented. This method will realize a display with a flexible screen shape and an expandable screen size.

5.3: Discharge Observation of Plasma Tubes

The plasma tube array display presents the wall size display with very high luminous efficacy. Discharging in plasma tube was observed to estimate the structure for high luminous efficacy. From the results of the observation, it is estimated that not only the discharge gap but also the discharge cavity effects to the luminous efficacy. With this result new structure was tries and 3.7 lm/W was achieved as the luminous efficacy.

A light and flexible plasma tube array with a film substrate

— The plasma tube array is expected to lead to the realization of wall-sized displays. This method will realize an emissive-type display with a flexible screen and an expandable screen size. We have investigated a plastic film substrate with display electrodes for use as a flexible screen and successfully developed the worlds largest bendable emissive display (1000 × 128 mm). The operating voltage distribution was improved compared to that with a plate substrate, and a sufficient voltage margin was maintained.

18.3: Dynamic Driving Characteristics of Plasma Tubes Array

The plasma tubes array is expected to realize the wall size display. However, as a reflection of our tube designing policy for high luminous efficacy, the basic electrical characteristics of plasma tubes array are different from those of conventional PDPs. Some new driving technologies were developed to make the dynamic driving sequence for conventional PDPs adoptable for this high efficacy plasma tubes array. With these results, a full-colour 1m by 128 mm tubes array composed of 128 plasma tubes with the luminous efficacy of 3.1 lm/W was developed.

29.1: Low Cost Barrier Rib Formation Technologies for High Efficiency PDPs

Two new techniques of barrier rib formation applicable to a variety of structures for high-performance PDPs suitable for mass-production were developed. The two techniques are mold replication, using adhesives with a reusable mold, and direct glass sculpting. Both equipment investment and material costs were reduced from previous methods in each technique. The feasibility of each method was demonstrated by fabrication tests and measured performance of test panels.

14.1: Invited Paper: Development of Plasma Tube Array Technology for Extra‐Large‐Area Displays

We developed the basic technology for a plasma tube array that could be used to produce emissive, extra-large-area displays. The cell design for high luminous efficacy was developed and luminous efficacy of 5.4 lm/W was achieved for a 20 cm test tubes array. Basic techniques, such as those to produce the tube structure, flexible electrode substrate, drive waveform, were also developed. A high luminous efficacy of 3.7 lm/W and lightweight of 0.6 kg were achieved for a 43-inches-diagonal test array.

High-luminance 1-m-long plasma tubes for wall displays

The plasma-tube array is expected to realize a wall-sized display. This method will realize an emissive-type display with a flexible screen shape and an expandable screen size. The shape of the plasma tube was investigated to realize high luminance, high luminance efficacy, and high flexural strength. As the result, a cyl indroid tube is proposed to satisfy these demands. An experimental display of 1 m x 128 mm has been developed with these cylindroid tubes and it demonstrated a high luminous efficacy of 3.1 lm/W.