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Development of a Display Color Viewing Angle Measurement System to Match Visual Perception

How to Measure 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.

The 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 (%).

-	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. 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.

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.

PDP is gentle to 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.


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








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.




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.












 

Panasonic VIERA Concept & Technology (4)

4. Tonal Expression
3,072 Equivalent Steps of Gradation
The equivalent of 3,072 steps of gradation express finely nuanced images. Maximum 16-bit video processing makes it possible to reproduce images with 3,072 equivalent steps of gradation. The picture noise nd black blocking that occur with insufficient gradation is suppressed even in scenes with intricate detail, fine textures and subtle expressions. Even the most detailed parts of an image are rendered with beautiful smoothness.

5. Contrast
Max. 10,000 : 1 Contrast
Increased luminous efficiency achieves maximum contrast of 10,000:1. The ability to express rich, deep blacks is extremely important for displaying beautiful pictures. VIERA uses the Real Black Drive System to minimise pre-discharge emission and improve the expression of black colours. In addition, the Deep Black Filter for the front protective glass further enhances rendering abilities to deliver richer, deeper blacks. The VIERA screen also minimises glare even in well-lit rooms to ensure high picture quality.

6. Gentle to Eyes
Professor Akira Okada of Osaka City University conducted experiments to prove that plasma TVs are more gentle to the eyes than LCD TVs.The test found that plasma TVs are easier to watch and less tiring.

Panasonic VIERA Concept & Technology (3)

Beautiful Images from Any Angle

The plasma panel uses self-emitting pixels, so images appear clear and beautiful from any angle. The images on an LCD TV tend to appear whitish when viewed from an angle. Since the Plasma Display Panel displays images with self-emitting pixels, the picture is vivid and clear from corner to corner, regardless of the viewing angle. This means that a group of people can watch high-quality, high-resolution images on a large-screen plasma TV at the same time.

Advanced 3D Colour Management

Crystal-clear blues, crisp greens and vivid reds are beautifully rendered. VIERA adjusts colour tones three-dimensionally on the colour difference plane and in the brightness axial direction. This precise, detailed control achieves optimum colour correction. As a result, VIERA displays images in richly vivid, beautiful colours that leave a strong impression on the viewer. In the 2007 models, red expression has been improved even more.

Panasonic VIERA Concept & Technology (2)

2. Motion Image Expression
Superb Motion Image Display
The Plasma Display Panel's self-emitting illumination achieves high motion image resolution. While an LCD displays images by varying the intensity of the backlight, the Plasma Display Panel displays them with its self-emitting pixels. This gives the Plasma Display Panel superb motion image response and renders high-resolution images without blurring even in scenes with considerable motion, like sports and movie scenes. Motion Pattern Noise Reduction Tonal expression is enhanced by suppressing pseudo-contour noise in motion images. The Motion Pattern Noise Reduction circuit detects motion patterns that tend to generate noise, and makes adjustments to maximise image quality. It helps produce clean, sharp images with outstanding gradation, even in scenes with considerable motion. The result is a noticeable improvement in moving picture quality. 3. Colour Reproduction   Faithful Colour Reproduction The original colours contained in digital HD broadcasts are faithfully reproduced. Digital HD broadcasting is based on the colour specifications specified by the HDTV standard (ITU-R BT709). VIERA Plasma Display Panel offers 100% coverage of the colour reproduction range specified by this standard. Because VIERA's colour gamut is very close to that of the HDTV standard, it is able to reproduce digital HD broadcasts with natural and beautiful colours.

Panasonic VIERA Concept & Technology (1)

Panasonic Viera Picture :

Five Essential Factors for Beautiful Images, and the Functions that Achieve Them

1 Resolution ‧ 1080p Digital Processing Chip-set ‧ 1080p Digital Re-mastering Processor ‧ Sub-pixel Controller 2 Motion Image Expression ‧ Superb Motion Display ‧ Motion Pattern Noise Reduction 3 Colour Image Expression ‧ Faithful Colour Reproduction ‧ Beautiful Images from Any Angle ‧ Advanced 3D Colour Management 4 Tonal Expression ‧ 3,072 Equivalent Steps of Gradation 5 Contrast ‧ Max. 10,000:1 Contrast

1. Resolution

1080p Digital Processor

Possible to processes 1080p signal and non HD video signals are also converted to HD level and reproduced 1080p Digital Processing Chip-set The VIERA processor supports the input of 1080p video signals. The processor also applies optimum signal processing to the input 1080p video signal without down-converting it, and outputs the signal in the same 1080p format. 1080p Digital Re-mastering Processor The VIERA processor converts analog TV broadcasts and DVD sources to 1080p video signals. This allows it to render crystal-clear pictures with every detail preserved. In fact, VIERA images are more beautiful than the originals. The VIERA processor also applies i/p conversion to 1080p video signals for even higher resolution. This ensures the display of sharper, clearer high-definition images on large screens.

Sub-pixel Controller

Dot-by-dot correction for smooth diagonal lines! Whereas sets of RGB dots were treated as a single pixel in conventional systems, VIERA's Sub-pixel Controller processes each R, G, and B sub-pixel individually. This results in smooth diagonal lines, which otherwise become noticeably jagged or blurred when displayed on a large screen. The Sub-pixel Controller ensures sharp, clear contours.

Dramatically Improves the Picture on Your Home Entertainment System

The Datacolor SpyderTV colorimeter and software deliver an easy-to-use solution for optimizing any TV for a better viewing experience. SpyderTV scientifically measures contrast, brightness, color, tint, and color temperature presets on your TV and helps you make the necessary adjustments to dramatically improve your picture quality. SpyderTV supports Plasma, RPTV, DLP, LCD and CRT TVs.

Features & Benefits

• Innovative SpyderTV Colorimeter
  The new standard for TV color accuracy. SpyderTV scientifically determines the optimal settings for your system using the sliders that exist in the user menu of your TV.
• Sleek Hardware Design
  Cutting-edge industrial design offers effortless calibration for all types of TVs.
• Easy-to-Use Calibration Wizard Software
  SpyderTV walks you through the entire optimization process with its intuitive interface. Comprehensive help screens guide you through each step to achieve your desired color setting.
• Step-by-step Instructions
  SpyderTV instructions video will turn you into an expert.
• Excellent Reporting
  SpyderTV provides an excellent report after optimization of the TV. You can save and/or print the report for your future reference.
• Unique Before and After Viewing Feature
  Our unique before and after images allow you to compare your TV's before and after state.
• SpyderTV supports Plasma, RPTV, DLP, LCD and CRT TVs.

You Bought A Great TV. We Can Make It Better.

What is TV calibration?
Professional calibration is essentially "custom tuning" your TV to perform at its best in your own home. Using our hardware and software, it scientifically measures and adjusts your TV, taking into consideration the components that it's connected to, room lighting, and other factors that affect performance.

Whatever type of high-definition TV you own - plasma, DLP, LCD, or other - professional calibration will make a visible and obvious improvement in picture quality.

Why do I need it?
Right out of the box, your new TV is still set at the factory's default settings - NOT the ideal settings for your home.Your TV's performance can be greatly improved, and the secret is calibration. Consider this:

	- Your TV can only deliver maximum performance when it's calibrated to work perfectly with your video sources (such as cable and DVD) and with the room's lighting conditions.
	- Each TV has a set of sensitive controls; obtaining the correct values is very difficult by eye alone.
	- Color settings can drift over time, so calibration is recommended for older TVs as well. What are the benefits? Professional calibration is the one thing you can do to dramatically improve your TV's picture quality. Here are just some of the improvements you'll be able to see immediately: - Color values will be more accurate. - Skin tones will be more natural and lifelike. - Shadow and highlight detail will be maximized, for a much fuller viewing experience. - You'll see improvement in cable and satellite programming, next- generation DVDs, video games - even your existing DVDs and home movies. - Films will more accurately represent what their directors intended - Optimizing the settings can improve the efficiency of your TV and extend its life.