apdc

"The Evolution of PDP" - PDP Technology Continues to Develop

APDC aims to develop PDP with cell pitch of 0.1mm and luminous efficacy of 3 lumen/watt. This luminous efficacy corresponds to 10 lumen/watt for cell pitch of 0.3mm, which is used by current Plasma TV. To realize the so-called "10 lumen/watt technology", the energy loss must be minimized for the small cell pitch.
The technology will expand the areas which Plasma can become the most suitable display in many scenes in our society.

Large Screen PDP
Plasma panels are easier to increase its size compared to other TV display devices because of its technical architecture. There is a 103V plasma already. By further increasing size and resolution, even a movie theater screen size Plasma will no longer be a dream.
Super High Resolution PDP
For example, by improving resolution and brightness, we can even make a 55V plasma with 4,000x2,000 pixels. This will make Plasma suitable for medical fields or movie production studios which require especially high resolution. It will also be perfect for the ultimate home theater display.
10-lumen technology!=High Definition, High Efficiency
Small Size Super Resolution PDP
The increase in resolution and brightness will be able to make smaller Full HD Plasma TV's such as the 27V. It will be suitable for standard monitors in broadcasting and other studios to show the real gradation which the director originally intended to express.
Energy-Saving PDP
PDP is energy-saving because it consumes less power in black scene. For example, power consumption can be decreased to less than 70W with a 42V PDP when luminous efficacy of 10 lumen/watt is materialized.

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PDP is Gentle on the Eyes

PDP has a very advanced brightness control technology to minimize visual fatigue.
For example, PDP will pick up the bright area in the screen and display that part in high brightness. If the screen is all white, it will decrease brightness to 1/5. This is why PDP is gentle on the eyes and will minimize the chance of visual disorder even after watching a long movie.

Picture Quality Difference between PDP and LCD Prof. Makoto Takahashi, Interpersonal Behavior / Osaka Kyoiku University, 2005

Although the display characteristics of PDP and LCD are very different, they require accurate brightness control to minimize visual fatigue and over exposure.
 
Dynamic Brightness Contorol


Experiment Comparing PDP-TV & LCD-TV Prof. Makoto Takahashi, Interpersonal Behavior / Osaka Kyoiku University, 2005

Change in Grading Vision
Relative Transition in Subjective Symptom "Eye Tiredness"
 
LCD-TV imposed relatively high stress on vision  -->  "Vision Deterioration" "Eye Tiredness"
From 2nd Stage Experiment
As a result of comparing PDP-TV and LCD TV, LCD-TV viewer group's grading vision deteriorated after watching LCD-TV. Whereas PDP-TV viewer group's vision did not deteriorate, LCD-TV viewer's vision deteriorated gradually and did not recover completely after a break. Thus LCD-TV can be said to strongly affect the viewer's vision.

From 1st Stage Experiment
As a result of comparing the viewer's subjective symptom of eye tiredness, the experiment statistically confirmed that the number of those who claimed tiredness increased with time in the LCD viewer group.
(F(5,40)=11.305,p<.001) Since the tiredness recovers after approximately 30 minutes break, this symptom of tired eyes can be said to be caused by watching LCD-TV. On the contrary, although few claimed tired eyes before watching, the change in such symptom was not observed in the PDP viewer group. This corresponds with the result of the grading vision and indicates in symptoms as well that LCD-TV affects eye tiredness.


「視聴疲労」の定量化

狙い
検討内容

表示方式の違い 視聴疲労の差を心理評価と生理評価で定量化
Test models: 42-inch PDP by company A, and 45-inch LCD by Company B (both models released in 2005)

急性実験の結果(テロップ視聴)

通常視聴実験の結果(模擬番組視聴)

検討結果

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PDP's Aim for High Picture Quality

The performance of PDP advanced significantly as the market grew rapidly in the 21st century. From now on, people will be asking for a display device not only by its performance as a display, but also by how much it can describe the true nature of the image. It becomes more important to raise the level of color and brightness which the image is supposed to describe, not only by increasing the number of pixels to display more details.

PDP, which is a self-light-emitting device, has many advantageous characteristics to describe high level picture quality for high resolution, large screen TV's. One of the characteristics is Moving picture resolution. PDP can reproduce clear image of fast moving in sports or a flower field gazing in the wind without any blur. The second characteristic is the color reproduction. PDP can describe primary colors to subtle gradation colors with its true and delicate touch. The third is contrast, which can describe true white and jet black. The firm expression of black enhances thesolidity of the picture, and will even show the glitter in jewels or the touch of jet black fur of a cat as if you could reach out and touch. PDP's beautiful gradation will reproduce delicate feeling or subtle shadow of the object, and will clearly show the details in dark scenes which often appear in movies. Another advantage of PDP is that the contrast and color does not change from any viewing angle. Large size PDP-TV is the key role player in the living room which entertains the family.

APDC works to evolve these advantages of PDP, and will create the future ofPDP-TV to bring joy to all the families in the world.

Spectacular High Picture Quality

[Moving Picture Resolution]  clear Moving 動きの速い映像をクッキリ再現できるテレビは、スポーツやアクション映画などの動きの激しいシーンも滑らかに再現します。
[Still Picture Resolution]  possible of more delicate expression 静止画解像度は主に画素数で決まります。フルHD(1920×1080画素)のディスプレイはハイビジョン放送をより緻密な映像で再現することができます。
[Contrast]  true white and jet black 純白と漆黒の比がコントラスト、キラッと光る鋭い光や映画に多い暗い映像の表現力が映像に深みを与え、立体感や鮮明さが感動を伝えます。
[Gradation]  smooth gradation 階調特性の良いディスプレイでは、映像が持つ細やかな質感までもグラデーション豊かに表現することができます。
[Color Reproduction]  ample color reproduction 原色から微妙な色合いまで美しく再現できることはディスプレイにとって非常に重要な要素です。リアリティあふれる色再現が映像の持つ感動や迫力を余すことなく伝えます。
[Viewing Angle]  beautiful from any angle 大画面テレビは茶の間の主役、どこから見てもコントラストや色の変化がないことは重要なポイントです。広い視野角のテレビは家族や友人と感動を分かち合えます。

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How to Measure Moving Picture Resolution

The Purpose of Measuring Moving Picture Resolution
Resolution of Flat Panel Displays has been commonly described in pixels, although the number of pixel of the panel and how it really looks is dependent on the characteristics of the panel type especially in displaying moving picture as in TV programs.
APDC developed a method of measuring and evaluating moving picture display performance in a scale that is close to human vision. This method allows quantitative analysis of resolution which is closely related to the number of pixels of the panel for moving picture.

Outline of Moving Picture Resolution
T he measurement simulates human eye system to reconstruct the image which is to be reflected on retina, and quantitatively evaluates the actual resolution which the display can describe. It measures the resolution of moving picture in a way how it really looks in "TV lines" or "deterioration ratio against still picture resolution (%).
 
The System of Measurement
Procedure
Make a follow shot on the resolution chart scrolling on the display.
Read the resolution scale at the limit point where the pattern can be recognized.
   
The resolution, given at the typical speed of "five seconds per screen", is defined as representative value of Moving Picture Resolution.
Moving Picture Resolution (Relative Value)

We propose to the Full HD TV manufacturing / sales companies to widely use this indication so that the consumers can easily understand the Moving picture resolution of each display.

Plasma makes it possible!

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Development of a Display Color Viewing Angle
Measurement System to Match Visual Perception
Purpose of development of newly defined 'color viewing angle' measurement method
Why is a color viewing angle necessary?
New Method Highlights
Color Viewing Angle Definition and Characteristics
Color Viewing Angle Definition and Characteristics
Definition Viewing angle where the amount of color change
from measured front on color (冰’v’) reaches 冰’v’=0.015.
Characteristics 1. Quantifies image difference using the easiest to perceive color change 冰’v’.
2. A Macbeth chart is used to derive a color change perception threshold that is common for all displays.
3. Provides a means of expressing physically measured viewing angle color characteristics that match user perceptions.
Experiment for Evaluating Color Change Perception Threshold
Color Viewing Angle Measurement Method and Results
Measuring Method
Example Measurement Results Measurement Device Development
Conclusion
Development Results
We were able to develop a system that allows representation of display viewing angle characteristics on a scale that parallels human eye perception.
● Using human visual perception characteristics as a basis, we derived a color change perception threshold. Color change 冰’v’=0.015
● We were able to determine and quantify user perception of the angles at which a display is able to maintain the same colors as those visible when viewed from straight on. 
● We developed a system that combines a spectral radiance meter with a rotary stage for automatic color viewing angle measurement.

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Great for moving pictures! Even moving pictures are crisp and clear.
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