Panasonic GP7 Service Manual
Panasonic
Technical Description
Model: GP7 Series Plasma Display Monitor
[Foreword]
The requirements for flat, thin TVs that have high image quality are increasing
along with the spread of digital broadcasting services and the growing popularity
versatile discs (DVDs). We have developed the “VIERA” digital Hi-Vision plasma
TV to satisfy such demands. The VIERA features the “PEAKS” improved image
quality system which offers images of 3.62 billion colours and maximum gray
scale with 2,048 levels. The PEAKS incorporates innovative colour creation
(TH-42PW7 Back View)
technology to produce vivid images as well as proprietary “Motion Pattern Noise
Reduction” (i.e. MPD) technology to eliminate most of motion picture
anomalies and artifacts which are a continuing problem with plasma display
panel TVs, the PEAKS make it possible to gain a 10% increase in brightness
along with a 10% decrease in power consumption.
1
1. New Feature
1-1. Structure of New PEAKS System
To realize the high picture quality in Hi-Vision broadcasting, a large size screen, we,
Panasonic have originally developed the necessity plasma panel, panel driver, digital
processing LSI. The total system achieved the high picture quality names a Picture
Enhancement Accelerator with Kinetic System so calls the “PEAKS”. This time the PEAKS
improved moreover its feature and finally “New PEAKS” developed for introduction of the 7
series plasma TV. The new PEAKS proceeds video signal in full-digital and make it possible
to deal with the video signal with no degradation and high picture quality. As can be seen in
Figure 1, this shows high picture quality system New “PEAKS”
Digital Tuner
PEAKS Processor
Plasma PEAKS Driver Panel PEAKS
SD Card
High Picture Quality Control
*New Advanced Real Gamma
HDMI
*Vivid Colour Creation
*Sub Pixel Enhancer
Analogue
Video
A/D CONV
*Motion Pattern Noise Reduction
*Real Black Creation
Plasma Panel
Figure 1 High Picture Quality System New “PEAKS”
1-2. Plasma PEAKS Driver
A large size screen had the visual presence, reproduction of motion picture are the major
features for plasma TV. The new developed PEAKS driver has improved moreover those
features and newly employed the following five functions.
1) New Advanced Real Gamma
2) Vivid Colour Creation (= Colour Management)
3) Sub Pixel Enhancer
4) Motion Patter Noise Reduction (MPD)
5) Real Black Creation
2
g
1-2-1. NEW Advanced Real Gamma
As can be seen in figure 2, the human sight senses the minimum variation of brightness at
especially dark picture, and therefore it’s necessary for a fine graduation at the dark scene
against the bright scene. The new advanced real gamma controls the sub-field in
accordance with scene, so that each pixel is controlled in fine and in addition the new
plasma panel allocates the fine graduation to the low luminance range and eventually total
2,048 graduations are reproduced by normal or cinema mode setting. By this technique, the
result of dark scene is dramatically enhanced image clarity with fine detail and realism.
Sight Characteristics
Minimum Unit for Sense of Si
Bright ness
Dim Bright
ht
Figure 2 Sense of Sight verse Brightness
Real Gamma Supper Real Gamma
Graduation
Brightness
Brightness
PHD7 Normal/Cinema
2048
1536
1024
PHD7 Dynamic
PHD6
768
512
Dark Bright
Dark compensates gradation step becomes 2/3 of other component.
Scene
(APL)
Figure 3 New Advanced Real Gamma
3
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