Sony Unveils OLED Panel of Its New Lens Interchangeable Cameras

Aug 30, 2011
Shinya Saeki, Nikkei Electronics
An image seen through the EVF of the "alpha77"
An image seen through the EVF of the "alpha77"
[Click to enlarge image]
The OLED panel
The OLED panel
[Click to enlarge image]

Sony Corp mounted an electronic view finder (EVF) using an OLED panel on its lens-interchangeable digital cameras that were announced Aug 24, 2011 (See related article).

According to the company, three of them are the world's first lens-interchangeable digital cameras equipped with an EVF.

The OLED panel employed for the EVF has a screen size of 0.5 inches and a pixel count of about 2.4 million (1,024 x RGB x 768). The size of its sub-pixel is 3.3 x 9.9μm.

Compared with the LCD panel used for the EVF of the "α55," Sony's former product, the contrast ratio of the OLED panel is about 10 times higher, the company said. But Sony declined to comment on the specifications of the panel including contrast ratio, brightness and color gamut.

Sony realized the color display by combining white organic light-emitting diodes (WOLEDs) and red, green and blue color filters. With a small molecular WOLED material, the company formed OLED elements by using an evaporation method.

As a result, compared with the method in which red, green and blue OLED elements are formed, the resolution of the panel was enhanced. Sony formed driver elements, D-A converter, timing controller, etc on a silicon (Si) substrate.

The panel is produced in volume at the Higashiura Office (Aichi Prefecture, Japan) of Sony Mobile Display Corp, which is Sony's subsidiary.