A novel driving scheme based on simultaneous emission is reported for 2D/3D AMOLED TVs. The new method reduces leftright crosstalk without sacrificing luminance. The new scheme greatly simplifies the pixel circuit as the number of transistors for V th compensation is reduced from 6 to 3. The capacitive load of scan lines is reduced by 48%, enabling very high refresh rate (240 Hz). IntroductionStereopsis, the basic principle of producing depth perception with 2D displays, was discovered by Sir Charles Wheatstone [1] in 1838. In fact, the first "motion picture" was a series of stereoscopic images (1878) [2]. Since that time, various types of 3D displays have been invented. However, the overwhelming majority of today's displays are only 2D capable, despite the viewer's interest in 3D displays.Fatigue or dizziness from watching 3D displays may be the primary cause for slow adoption. Poorly authored 3D content is one factor that causes discomfort. Having to wear special glasses for one to two hours is another. The third factor is the discrepancy of the rendered images with the real solid object. Many 3D displays fail to reproduce the feeling of solidity of a 3D object because some of the information (image) intended for the left eye gets to the right eye and that for the right eye reaches the left eye. We call this undesirable effect left-right (L-R) crosstalk.Viewers do not like having to wear 3D glasses. Therefore, autostereoscopic displays would be preferred. However, auto-stereo displays developed thus far have a very limited viewing zone (angle and distance) and inevitably they show L-R crosstalk. Only stereoscopic displays that include passive/active glasses can be made L-R crosstalk-free regardless of the viewer's position and viewing angle.In order to send left and right images separately, stereoscopic displays use two methods: spatial division or temporal division. Spatial division requires 2x spatial resolution (2x FHD for FHD) and temporal division requires 2x temporal resolution (120 Hz for 60 Hz). In most cases, spatial division incurs higher cost (2x driver ICs and patterned polarizer) than temporal division and it is subject to penalties due to reduced aperture ratio (reduced life time for AMOLEDs and reduced brightness for LCDs). For these reasons, we believe that the temporal division should prevail in the near term, that is, before an auto-stereoscopic display that is completely free from restrictions on viewing zone is invented.In this report, we propose a new scheme for frame-by-frame driving of a 3D AMOLED display. It exploits the fast responding and self-emissive nature of AMOLEDs to produce bright and L-R crosstalk-free 3D. New Driving Scheme: Simultaneous EmissionFIGURE 1 shows conventional driving methods for AMOLEDs. There are basically four distinct functional steps: (1) reset, (2) V th storage, (3) data scan, and (4) emission. In the conventional method, all these steps progress line-by-line, including the emission step. We call this approach progressive emission (PE). A frame-by-frame impl...

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3D displays have required 1/240 s of scan time to properly display a stereoscopic image. In this report, a new driving method is proposed that provides 1/120 s of scan time, thus enabling higher resolution. The pixels are arranged as two groups: Even and Odd. One group performs scanning while the other group is emitting and in the next field, these roles are swapped. Therefore, the entire frame time can be used for data input, rather than 1/2 of the frame time as in the previous method.

We have developed a 14.1 inch full color polymer LED display, based on an a-Si TFT backplane, using ink jet printing, which does not show visible swathe marks during display operation. To remove the swathe marks, we have developed the single path printing technology for the hole-conduction layer deposition to significantly reduce the complexity of interlacing printing across the panel, which is known as an alternative to remove the swathe marks. In addition, we have adopted the interlayer process to increase the lifetime of ink jet printed displays. These technologies will enable the scale-up of the ink jet printed AMOLED applications to larger size displays, such as desktop monitors and TVs.

A novel driving scheme, smart power control (SPC), is reported to reduce the power consumption of an AMOLED panel. SPC analyzes the range of the input data of each frame, calculates the optimum level of the power rail that drives the OLED, and varies the power rail voltage accordingly. As a result, a 30" AMOLED consumes 20.1% less power when displaying the IEC 62087 standard movie clip.