F. P. M. Budzelaar

Towards large‐area full‐color active‐matrix printed polymer OLED television

Abstract— We have developed a new multi-head polymer OLED ink-jet-printing technology to make large-screen OLED television displays. This printer is used to make a 13-in.-diagonal 16:9-format polymer-OLED prototype driven by an LTPS active matrix with a pixel circuit which compensates for TFT threshold-voltage variations. A novel scrolling-bar addressing scheme is used to reduce motion artifacts and to make sparkling images with a high local peak brightness. The scalability of the polymer-OLED technology to larger sizes for television applications is discussed.

Novel concept for full‐color electronic paper

— Despite a steep increase in commercial devices comprising paper-like displays, a much desired feature is still missing: bright full-color electronic paper. A new reflective-display technology has been developed to solve this issue. For the first time, the principles behind this in-plane electrophoretic technology will be presented, which enables the realization of full-color reflective displays with a higher brightness than presently available e-paper technologies, without compromising paper-like properties such as viewing angle and ultra-low power consumption. An additional major advantage (e.g., for future low-cost manufacturing) is that, besides direct-drive and active-matrix configurations, a passive-matrix option with analog gray levels has been successfully developed.

44.4: Distinguished Paper: Towards Large‐Area Full‐Color Active‐Matrix Printed Polymer OLED Television

We have developed a new multi-head Polymer OLED inkjet print technology to make large screen OLED television. This printer is used to make a 13″ diagonal 16:9 format Polymer OLED prototype driven by an LTPS active matrix with a pixel circuit which compensates for TFT threshold voltage variations. A novel scrolling-bar addressing scheme is used to make sparkling images with a high local peak brightness. Color processing is used to improve the overall perception of the image.

46.1: Invited Paper: Novel Design for Full‐Color Electronic Paper

Despite a steep increase in commercial devices comprising paper-like displays, a much desired feature is still missing: bright full-color electronic paper. We have developed a new reflective display technology to solve this issue. for the first time we will report about the principles behind our in-plane electrophoretic technology, which enables the realization of full-color reflective displays with a higher brightness than all present e-paper technologies, without compromising paper-like properties like viewing angle and ultra-low power consumption. An additional major advantage (e.g. for future low-cost manufacturing) is that, besides direct-drive and active-matrix configurations, a passive-matrix option has been developed successfully.

44.5: Dynamic Wide‐Color‐Gamut RGBW Display

LCD displays with an additional white primary (RGBW displays) have some clear advantages over conventional RGB displays. Firstly, they can transmit 50% more light and secondly they can have 50% more resolution compared to a conventional RGB display. RGBW displays also have a clear disadvantage; the display gamut does not match with the standard three-primary (RGB) input gamut. Up to now, this resulted in rather poor color rendition of such displays, which prevented mass-introduction in the (high-end) LCD-TV market. This paper presents the Philips Dynamic Gamut concept that solves the color rendition issues and describes the technical details of a 26″ demonstrator that proves the concept.

The Fast Intelligent Tracking (F!T) tube: A CRT without a shadow mask

The F!T tube is a new type of CRT without a shadow mask. The primary function of the mask, color selection, is taken over by an electronic control system that guides the electron beams over the correct phosphor lines. The position of the beams is detected by means of dedicated structures on the faceplate. Proof of the principle has been shown in single- and triple-beam 17- and 32-in. tubes.

Video processing for active‐matrix polymer OLED TV

— Active-matrix OLED panels have inherent features that allow a higher-quality image reproduction than LCD panels, i.e., high-contrast, fast response time, and the capability to produce locally high peak luminance levels. We demonstrated a 13-in.-ink-jet-printed active-matrix polymer-OLED prototype for TV applications at SID 2004. This prototype is used as a carrier for studying video-processing algorithms that take full advantage of the specific characteristics of OLEDs. Addressing schemes, gamut conversion, histogram-based brightness control, and sparkle processing will be discussed.

44.1: The Fast Intelligent Tracking (F!T) Tube: A CRT without a Shadow Mask

The F!T tube is a new type of CRT without a shadow mask. The primary function of the mask, color selection, is taken over by an electronic control system that guides the electron beams over the correct phosphor lines. The position of the beams is detected by means of dedicated structures on the faceplate. Proof of the principle has been shown in single- and triple-beam 17″ and 32″ tubes.

Quantitative imaging performance of frequency-tunable capacitive micromachined ultrasonic transducer array designed for intracardiac application: Phantom study

Highlights2‐D imaging probe prototype based on a collapse‐mode CMUT array developed.Imaging performance quantified at a range of bias voltage and driving pulse settings.Demonstration of frequency tunability on a tissue‐mimicking phantom.Images with different characteristics (e.g. penetration, resolution) are presented. ABSTRACT Commercially available intracardiac echo (ICE) catheters face a trade‐off between viewing depth and resolution. Frequency‐tunable ICE probes would offer versatility of choice between penetration or resolution imaging within a single device. In this phantom study, the imaging performance of a novel, frequency‐tunable, 32‐element, 1‐D CMUT array integrated with front‐end electronics is evaluated. Phased‐array ultrasound imaging with a forward‐looking CMUT probe prototype operated beyond collapse mode at voltages up to three times higher than the collapse voltage (Symbol V) is demonstrated. Imaging performance as a function of bias voltage (Symbol V to Symbol V), transmit pulse frequency (5–25 MHz), and number of transmit pulse cycles (1–3) is quantified, based on which penetration, resolution, and generic imaging modes are identified. It is shown that by utilizing the concept of frequency tuning, images with different characteristics can be generated trading‐off the resolution and penetration depth. The penetration mode provides imaging up to 71 mm in the tissue‐mimicking phantom, axial resolution of 0.44 mm, and lateral resolution of 0.12 rad. In the resolution mode, axial resolution of 0.055 mm, lateral resolution of 0.035 rad, and penetration depth of 16 mm are measured. These results show what this CMUT array has the potential versatile characteristics needed for intracardiac imaging, despite its relatively small transducer aperture size of 2 mm Symbol 2 mm imposed by the clinical application. Symbol. No caption available. Symbol. No caption available. Symbol. No caption available. Symbol. No caption available.