Teruo Tohma

Organic LED full‐color passive‐matrix display

— A full-color 5.2-inch 1/4-VGA passive-matrix organic LED display has been developed, adopting selective deposition for the different emitting materials. The display features 320 (×3) × 240 pixels with an equivalent pixel size of 0.33 × 0.33 mm, white peak luminance of over 150 cd/m2, and power consumption of 6 W.

Dot‐matrix display using organic light‐emitting diodes

— A dot-matrix display with 256 × 64 pixels with a pixel size of 0.34 × 0.30 mm in size, a luminance of 100 cd/m2, and a contrast ratio of 100:1 or better has been developed using organic LED devices. The display provides high luminance, high visibility, and wide viewing angle.

Organic LED Full Color Passive-Matrix Display

A full color 5.2 inch 1/4VGA passive-matrix organic LED display has been developed adopting selective deposition for the different emitting materials. The display features 320 (× 3) × 240 pixels with an equivalent pixel size of 0.33 × 0.33 mm2 white peak luminance of over 150 cd/m2 and power consumption of 6 W.

Acoustic vibrating element of graphite and method of manufacturing same

An acoustic vibrating element, such a domed speaker diaphragm A or a phonographic pickup cantilever B, is formed by vapor deposition on an easily separable mold member 5 of tantalum or tantalum alloy when a mixture of a hydrocarbon gas and an inert gas is passed through a furnace heated to a temperature of 1150° C.-1250° C. at a flow rate in excess of 200 cm/min. The c-axis crystalline orientation of the resulting graphite element is substantially perpendicular to its surface, which provides a Youngs modulus above 16,000 Kg/cm2.