JVC HD-ILA Service Manual

HD-ILA

HDILA Update

HD--

--HD

HD--

--HD

HD--

--HD

XXG786

XXFH96

XXG787

In this course, we will address the differences

In this course, we will address the differences

between the model numbers on this slide.

Obviously, the XX in the model numbers is the

variable for screen sizes of 52, 56, 61 and 70

Table Of Contents

New Features

New Features

Difference of V0 System and

Difference of V0 System and

V1 System

Iris Aperture Control

Iris Aperture Control

HD--

HD Screen Door Effect

Gamma Correction

Lamp 5 Aspect Adjustment ATSC

ILA Projection Lens

Screen Door Effect

Gamma Correction

Lamp

TH

5

Generation D.I.S.T

Aspect Adjustment ATSC

Cooling System

Cooling System

HD--

HD

HD--

HD

HD--

HD

Differences

Differences

McAllen Magic Writer Jig

McAllen Magic Writer Jig

(MMWJ)

Tech Reports

Tech Reports

Core returns

Core returns

56G786

56FH96

56G787

HD-ILA

New Feature

New Optical System

( carry from 2005 )

GENESSA

( carry from 2005 )

MaxxBass

New design system

ILA

9

Only some models

The new models for 2006 have a new optical

The new models for 2006 have a new optical

system which we will discuss later. The new

models are also employing a new

Some of the new models will contain a new

feature for the audio called

MaxxBass..

MaxxBass

genessa

IC.

V1 System Outline (1)

Difference of V0 System and V1 System

Difference of V0 System and V1 System

Light Path <Turn / Straight>

Light Path <Turn / Straight>

Iris Aperture Control

Iris Aperture Control

Cooling System

Cooling System

(only some models)

The new models ending in

The new models ending in

the light path straight verses a turn as used in

previous models. Some of the new models will

also use a Iris aperture control which can be

used when selecting the video status button.

The cooling system for the lamp and internal

parts of the OP have also been improved.

HD--

HD

XXGX

87

have

Iris Aperture Control (1)

Before use

Before use

Set brightness darkly

<ILA device’s dynamic range> : Use lower side only

<Picture's bit depth> : Becomes shallow

Slant of brightness is not smooth

s improved by ““

ItIt’’s improved by

“

Iris Aperture Control

“

Iris Aperture Control

”

Iris Aperture Control””

Iris Aperture Control

Before the use of the Iris aperture control there was noticeable

Before the use of the Iris aperture control there was noticeable

brightness indications in the picture as shown in this slide. No

the addition of the Iris aperture we can adjust the video status

improve the quality of the brightness.

Optical iris

Optical iris



•

Dark shading improvement



•

Dark shading improvement



•

Dark gray scale improvement



•

Dark gray scale improvement

w with

to

Previously, if the Brightness Control was used to adjust the pic

Previously, if the Brightness Control was used to adjust the pic

which is how the Video Status Button on earlier models functione

would limit the

shown in the right photo would be reduced and had the effect of

showing defined STEPS in the brightness of a contoured object su

as in this picture of a bottle

not smooth).

Now with the addition of the Iris aperture we can adjust the vid

Now with the addition of the Iris aperture we can adjust the vid

status to improve the quality of the brightness.

ILA

’

ILA

overall dynamic range, the Picture Bit Depth as

’

ssoverall dynamic range, the Picture Bit Depth as

’

s rounded shape (

’

s rounded shape (

“

slant of brightness

“

slant of brightness

ture,

d, it

ch

eo

Iris Aperture Control (2)

Iris Aperture

Iris Aperture

Choice

IMPORTANT:

"PICTURE ADJUST“ not related Aperture.

“

VIDEO STATUS

“

VIDEO STATUS

”

Aperture controls Light value.

”

ÆÆAperture controls Light value.

(Three phases)

: MIDDLE

: OPEN

: CLOSE

: MIDDLE

“CLOSE” phase picture

SERVO MOTER makes noise

The iris aperture controls the light value or amount

The iris aperture controls the light value or amount

of light when pressing the video status button on

the remote control. When in the theater mode the

iris is closed and the least amount of light is

permitted. When in the dynamic mode the iris is

open and the most light is permitted. During the

standard and game setting the iris is set to the

middle position. The iris aperture is opened and

closed by a servo motor which can be heard when

pressing the video status form one setting to

another. The picture adjust in the main menu does

not control the iris aperture and are not related.

Optical Iris

Highest Accuracy Black Level Reproduction

Highest Accuracy Black Level Reproduction

Ideal for

Ideal for

Standard

Brightness Level

“

Theater Light Level

“

Theater Light Level

Dynamic

Theater

Input Level

Rough

Step

Lower Black Level

Iris Open

(100%)

”

Viewing Environments

”

Viewing Environments

Dynamic

Standard

Theater

Iris Open

Iris 75%

Iris 50%

Contrast

Iris Closed

(50%)

Higher

Contrast

Ratio

Smooth

Step

In this slide you can view what the iris aperture

In this slide you can view what the iris aperture

would look like when it is in the closed and

open position. The graph shows the input level

verses the brightness level. As you can notice

that the contrast has a higher ratio and

smoother step as it changes to lower black

levels when in the theater mode. The iris

aperture is 50% closed.

Iris Aperture Control (3)

Object Models

Object Models

Model Names

56FH96

HDHD--56FH96

61FH96

HDHD--61FH96

70FH96

HDHD--70FH96

52G787, HD--

HDHD--52G787, HD

56G787, HD--

HDHD--56G787, HD

61G787, HD--

HDHD--61G787, HD

Circuit

Circuit

52G887

56G887

61G887

P.W.B ASS'Y

Name: IRIS P.W.B.

No. : SRA--

No. : SRA

Name: IRIS P.W.B.

No. : SRA--

No. : SRA

8301A--M2M2

8301A

83022

830

AA--M2

M2

Iris

OPTICAL/DRIVE ASSY

Include

The FH96 models employ the iris PWB SRA--

The FH96 models employ the iris PWB SRA

8301A--

8301A

8302A--

8302A

interchangeable. These are the only models

that have iris aperture feature. Future models

will also employ this feature. The iris aperture

is controlled by the main drive PWB and is

mounted on top the main drive PWB.

M2 and the G787/G887 use the SRA--

M2 and the G787/G887 use the SRA

M2. these boards are not

1080P HD-ILA Projection Lens

Newly Developed for

Newly Developed for

1080P Displays

Eleven Separate

Eleven Separate

Glass Components

One Aspheric

One Aspheric

Resin Coated Lens

Anti--

Anti

on Each Lens Element

Reflective Coating

Optical Lens improvement

Optical Lens improvement



•



 The new projection lens developed to display in

Peripheral resolution performance

•

Peripheral resolution performance

•

Brightness improvement

•

Brightness improvement

•

Chromatic aberration improvement

•

Chromatic aberration improvement

The new projection lens developed to display in 1080P have eleven separate glass components.

1080P have eleven separate glass components.

Each lens element is coated with anti--

Each lens element is coated with anti

coating to reduce unwanted reflections (screen door

effect). We will discuss this effect in a future slide.

reflective

1080P HD--

1080P HD

1080P Displays have

1080P Displays have

2 Million Pixels per chip

With 1080P displays, it is possible to

enjoy 1080i content at full 1080 x 1920

resolution.

720P Displays have only

720P Displays have only

1 Million Pixels per chip

With 720P displays, it is necessary to

scale popular 1080i content to the

lower

720 x 1280 resolution.

ILA

This slide is presented to introduce you to the differences betw

This slide is presented to introduce you to the differences betw

used in previous models, and the new 1080P chip used, for exampl

models.

Three Chip System

Three Chip System

Three Chips are

better than one.

Reflective Design

Reflective Design

Reflective is

better than

transmissive..

transmissive

No Mechanical

No Mechanical

Color Wheel

All Digital, Direct Drive

No Moving Parts in

the Optical Engine Path

No

“

No

Simultaneous Display of Red, Green, & Blue

Fatigue

No Visible

93% Efficient

Rainbow

“

Rainbow

No Single--

No Single

Electro--

Electro

Micro Mirror

Simultaneous Display of Red, Green, & Blue Color Channels for Film--

Color Channels for Film

Fatigue--

No Visible

“

Screen Door Effect

“

Screen Door Effect

93% Efficient

Highest Brightness

Excellent Contrast, with

Linear Grayscale

Realistic

”

Effect

”

Effect

Chip,

Mechanical

“

Rainbow

”

“

Rainbow

Free Extended Viewing

“

shadow detail

“

shadow detail

Artifacts

”

Artifacts

Like Images at All Times

”

een the 720 resolution chip

e, in the HD--

e, in the HD

56FH96

1080P HD-ILA

Horizontal Resolution 1920

2,073,000 Pixels x 3 !!

HD-ILA

1080p Chip

Vertical Resolution 1080

10.1 Mega pixels per sq. in.

Vertical alignment of

Vertical alignment of

liquid crystal layer for

highest contrast

High aperture ratio

High aperture ratio

& high light efficiency

The 1080P HD--

The 1080P HD

for red, blue and green devices, effectively producing

6,219,000 total pixels to produce the picture.

The measurement of each chip is:

The measurement of each chip is:

As described in previous classes, the LCD material in

As described in previous classes, the LCD material in

these chips is VERTICLLY aligned in a configuration much

like individual threads and when viewed under a

microscope, resemble that threaded description in that

they are in a vertical, spiral shape.

Arranging the LCD material in this fashion provides a high

Arranging the LCD material in this fashion provides a high

aperture ratio that has the effect of blocking a minimum

amount of the entering and reflected light and gives a

very high, 93% efficient use of available light from the high

powered lamp in the Light Engine.

ILA chips have over 2 million pixels each

Screen Door Effect

With LCD

With HD-ILA

With

With

the light source is BEHIND the picture producing

element. This is typical of LCD television and Thin

Film Transistor computer screens. The screen door

effect is a result of the shadowing of the pixel

separations and of the driving devices (transistors)

that are required to activate each pixel of an LCD

screen. The shadowing pixel walls, appearing as

though you are looking through a screen door, and

the driving transistors block light giving the

perception of reduced brightness.

Transmissive

technology such as shown here,

GENESSA

Gamma Correction

Gamma Correction

Gamma characteristics is fixed. Therefore, dark and bright area

Gamma characteristics is fixed. Therefore, dark and bright area

lost by contents of an picture.

Gamma characteristics is variable. DGC preserves dark and bright

Gamma characteristics is variable. DGC preserves dark and bright

details.

What “Gamma”? Originally, Gamma means “Cam Inverse Gamma / CRT Gamma”. Now, “Gamma Correction” means display devices correction.

(or Control )

details are

characteristic

area

What is

This term was originally used as a standard for producing the co

images received by a camera, the correct color temperature being

Originally, Gamma means

The camera is a picture producing device. The ILA can be consid

producing device. This can be compared to a musical instrument

device, and an amplifier and speaker as the music re--

device, and an amplifier and speaker as the music re

In order for the two to match sound from production to reproduct

must be kept. In video, the most critical standard is GAMMA.

In the ILA, the GAMMA is designed to be kept at 6500 degrees Kel

temperature must be observed from full black (crushed) to satura

black to full white is measured in IRE units (Institute of Radi

black to full white is measured in IRE units (Institute of Radio

the form of a non--

the form of a non

representation of value X for red and value Y for blue, with gre

meeting point.

In older systems, Gamma Correction was a fixed setting and detai

sacrificed for overall correct color temperature.

DGC or Dynamic Gamma Correction is an active constant monitoring

corrections are made automatically, depending on picture content

temperature is achieved. DGC samples areas of the picture from

makes corrections to that particular section of the picture

Now,

“

Gamma Correction (Gamma Control )

“

Gamma Correction (Gamma Control )

“

Cam Inverse Gamma / CRT Gamma

“

Cam Inverse Gamma / CRT Gamma

linear curve tracking from these two conditions and is a vector

“

Gamma Correction

“

Gamma Correction

”

means display devices characteristic correction.

”

means display devices characteristic correction.

”

?

”

?

producing device.

rrect color temperature with

3500 degrees Kelvin.

”

.

”

.

ered a picture re--

ered a picture re

being a music producing

ion, certain standards

vin. This color

tion (full white). This full

o

Engineers standard). It takes

en being the standard the

ling of the picture was

so that a constant color

black to full bright and

–

actively and constantly.

–

actively and constantly.

of this vector and

Dynamic Gamma Control

Dynamic Gamma Control

Dynamic Gamma Control

Examine distribution of brightness of each pixel.

1)1)Examine distribution of brightness of each pixel.

Concentrated band have heavy Information.

2)2)Concentrated band have heavy Information.

Emphasize detail of Concentrated band

3)3)Emphasize detail of Concentrated band

Even if there are plural concentrated bands, DGC functions.

4)4)Even if there are plural concentrated bands, DGC functions.

It is controlled for a picture change so that correction does not t

5)5)It is controlled for a picture change so that correction does no

become unnatural

Input range

GENESSA correct a image every frame.

Correcting method

Correcting method

Dynamic Gamma Control

zzDynamic Gamma Control

Color Management

zzColor Management

CPU supports

correcting

and handles it

fast.

Color Management

Color Management

Color Management

Color Management works as follows.

Found

1)1)Found

Chroma and brightness levels gain, only

2)2)Chroma and brightness levels gain, only

lower a level of the whole the picture equally, in the range tha

3)3)lower a level of the whole the picture equally, in the range tha

can display.

4)

“

5 point color's are emphasized, and see the picture very well.

4)

“

5 point color's are emphasized, and see the picture very well.

“

5 point color

“

5 point color

Point 1 : green Point 2 : yellow Point 3 : red Point 4 : blue Point 5 : flesh tones

”

in the picture.

”

in the picture.

“

5 point color

“

5 point color

”

.

”

.

t a device

Better Gradation & Color Reproduction

Adjusts gradation and

color reproduction for

the best possible

picture by constantly

monitoring the picture

Intelligent Gamma

Clearer image of boat and face

Higher Contrast

Picture Processor (32bit CPU)

Analyzes the picture data

Color Creation

Flowers and boat with vivid colors

Better Color Reproduction

Improved Performance for Optimum Picture Quality...



•

Adds an extra axis to color management circuit for



•

Adds an extra axis to color management circuit for

improved color reproduction of skin tones



•

Local sampling process targets specific color



•

Local sampling process targets specific color

regions

Adding color management and dynamic effects

Adding color management and dynamic effects

together, the

enhancement of the details of dark areas with

Dynamic Gamma Correction (middle photo

the water and other items that would normally not

be seen), and peaks otherwise washed out colors

(rightmost picture), both functions being a part of

the 32 bit Picture Processor CPU.

Genessa

system makes an

–

look at

–

look at