engineering design

TEAM MEMBERS VISHWANATH SUJAY

MAHESHBALAKRISHNAMANJUNATH

RAHUL K SRIVASTAVA

DESIGN PROCEDURE FOR THE TELEVISIONSUJAY ---------

INTRODUCTION ,MORPOLOGICAL CHART

BALAKRISHNA--------PRODUCT DESIGN SPECIFICATIONMANJUNATH--- ------CREATIVITYMAHESH------------CRITERIA RANKING AND WEIGHTINGRAHUL K SRIVASTAVA---HARRIS DIAGRAM

Introduction

•Television (TV) is a widely used telecommunication medium for transmitting and receiving moving images, either monochromatic ("black and white") or color, usually

accompanied by sound.

• TELE means “far” in greek and vision means “see” in latin

• A standard television set comprises multiple internal electronic circuits, including those for receiving and decoding broadcast signals. A visual display device which lacks a tuner is properly called a monitor, rather than a television. A television

system may use different technical standards such as digital television (DTV) and high-definition television

ORIGIN OF TELEVISION

• In 1884 Paul Gottlieb Nipkow, a 20-year old university student in Germany, patented the first electromechanical television system

• In 1927, Philo Farnsworth made the world's first working television

system with electronic scanning of both the pickup and display devices

• The first practical use of television was in Germany

PRINCIPLES OF TELEVISION Transmission of Pictures• A television system uses one or more television

cameras to convert the light energy of a natural moving visible scene, either in a television studio or outdoors, into an electronic signal. Alternatively, the signal may be obtained from a video tape recorder, from telecine machines, or from slide scanners. These last two convert films or photographic slides into appropriate signals.

• This signal is usually conveyed by line to a television transmitting station where it modulates a carrier source, and the resultant vision -modulated carrier wave is passed to the transmitting aerial to be radiated in all directions as a broadcast vision signal.

Transmission of Sound• The sound energy information associated with the

visible scene is picked up by a microphone and converted into an electronic signal which is also passed by line to the transmitting station to modulate a separate carrier source. The resultant sound -modulated carrier wave is then passed to the transmitting aerial to be radiated into the atmosphere along with the vision-modulated carrier wave

Reception of T.V. Signals• Within a certain distance from the t.v transmitting aerial,

according to the amount of radio-frequency power radiated, a t.v receiving aerial can pick up the combined vision and sound modulated wave to pass it to a t.v receiver. The receiver amplifies the received signal, and then separates the vision and sound components after a demodulation process.

The Demodulation Process• The demodulated vision signal is passed to a cathode ray

tube to reproduce as closely as possible the original visible moving scene at the transmitting end. The demodulated sound signal is passed to a loud speaker to reproduce as closely as possible the original sound information associated with the visible scene. Figure 5 below shows the simple principles of a television broadcast system.

Panel specifications:

screen size

UV Glossy finish

75000:1 super contrast ratio .. Etc.,

High picture quality .

Automatic volume leveler .

Special added features:

With blue tooth.

Dust defender (creativity).

Use of super back up (creativity).

CONTENTS

• Panel specifications: Screen size

Super contrast ratio 1366*768 Resolution

500 cd/m2 brightness

• Picture: Selectable 12 picture models 5 mode colour temp. control

• Features: Channel name, programmes name Child lock, remainder timer , alarm, clock..,ect. Programme edit (swap, skip), organizer/directory.

• Best audio system.

• Tuning: FST tuning , 300+ programme memories , good connectivity

• Use of: remote/keys/touch screen keypad.

Invisible speaker HDML Expert mode Swivel stand

Intelligent sensor & AV mode

Foreword;- Circumstances which led including facilities, like-

For higher picture clarity & back light adjustment (cinema mode).

DCRe- (digital colour reality engine)

Easy connectivity should enable the customer requirements to connect other electronic gadgets.

digital noise reducer. (DNR)

Dolby digital audio o/p

With FM tuner , speaker & head set (with music mode).

INTRODUCING:i. Effective use of dust defender concept, to protect the screen.ii. Super contrast ratio with automatic adjuster.iii. With effective data transfer connection 9blue tooth )be included.iv. Good connectivity for S Video –in, VGA in ,OC audio in, 2 HDML RF in & also

USB., ect,.v. Other entertainment facilities ( gaming, sudoku, dictionary, ect)

SCOPE: As a initial requirements like picture & sound quality and their efficiency constant ,along with maintain ace of TV is also made simple by using dust defender may be it not cover whole system.

Music expressers i.e, special directory for Bluetooth, songs &with FM tuner

Soft start should be included

Effective speakers.

Automatic image optimization

• Today many features added TV's are in market but the customer wants almost all features that are available in other devices . So upon all that quality be the on of influential factor for PR

• The temperature range during operation is b/w 150 to 480c.

• The humidity range b/w 10 to 70%

o TV should consists of good effective speakers & pictures

o super back up include necessary recharging and charging type of batteries &it should be safe.

o Special electronic devices are required for special features like FM radio with speakers ,etc .these all maintained such that it should not increase weight of the product .

o 6 brand equalizers for audio.

o initialization must take <20 minutes

oFor packing &shipment assembles should be specified to prevent damage during transport .

o In manufacturing ,the design team should considered the wear résistance, flammability ,density ,hardness of the texture ,colour ,aesthetics &recyclability.

To proper operational requirements of the TV

1. Installation of the product is to be simplified by providing special mode of pins switch etc.., & also operator should ensure that no loose connection in power cord ( connect power cord 110/127-220 1240 v, 50/60 Hz supply

2. Stand –By key( mode) is provided in both remote &TV as on/off.

3. For the safety working of TV the necessary precautions that the customer should maintain is mentioned.eg

4 To prevent from shock or fire do not expose the receiver to rain or moisture.

5 Never spill any kind of liquid on TV. Etc.,

ACCEPTANCE STANDARDS

• The all the parts of TV should be standardized by the company like ISI,ISO& Other national acceptance standards.

• The wires connected should be good quality ,since there is no short circuiting .

DISPOSALTV are made up of such materials (parts) that are very

hazardous to environment ,while in discharging of it ..so RECYLING is necessary& minimizing the hazardous materials

CRITERIA RANKING

1)THE FIRST STEP IN FORMAL CONCEPT SELECTION PROCEDURES IS TO RANK THE PDS CRITERIA IN ORDER

OF IMPORTANCE.

2)MOST METHODS OF CRITERIA RANKING INVOLVE THE FORMATION

OF A MATRIX AND ONE METHOD, PROPOSED BY PUGH, IS PERHAPS THE

MOST WIDELY USED. THIS MATRIX HAS BECOME KNOWN AS

THE BINARY DOMINANCE MATRIX.

Criteria RANKING(television)

CONCEPTS A

B C D E F G TOTAL RANKIN

GA PICTURE

QUALITY - 1 1 1

1 1 1

6

1

B SOUND QUALITY

0 - 1 1 1 1 1

5

2

C CHANNELS

0 0

- 1 1 1 1 4

3

D Picture inpicture

0 0 0

- 1 1 1 3

4

E CONNECTIVITY 0 0 0 0 - 1 1 2 5f Remote and sensor 0 0 0 0 0 - 1 1 6g Botton control 0 0 0 0 0 0 0 0 7

CRITERIA WEIGHTING1) DURING THE WEIGHTING PROCEDURE

CRITERIA ARE FIRST RE-ORDERED2) WITH THE MOST IMPORTANT FIRST, AS IN TABLE THIS RE-ORDERING ENSURES THAT THOSE CRITERIA WHICH HAVE THE

GREATEST INFLUENCE ON CONCEPT SELECTION ARE CONSIDERED FIRST

3) THIS IS PARTICULARLY IMPORTANT WHEN MANY CRITERIA ARE INVOLVED AND MANY DECISIONS HAVE TO BE MADE. THE

ASSIGNING OF WEIGHTINGS TO EACH CRITERION IS THE SUBJECT OF MUCH

DEBATE.

CONCEPTS TOTAL POINTS WEIGHTAGE RANKING

A PICTURE QUALITY

6 0.285

1

B SOUND QUALITY

5

0.238 2

C CHANNELS 4

0.190 3

D Picture inpicture

3

0.142 4

E CONNECTIVITY 2

0.092 5

f Remote and sensor

1

0.047 6

g Botton control 0

0.000 7

TOTAL = 1.000

Criteria weighting(television)

PIE CHART

BAR CHART

HARRIS DIAGRAM FORTELEVISION

CRITERION STANDARD SCORE

MACHININGREQUIREMENT

LITTLE ++

GENERAL MACHINING -

SPECIALIST MACHINING --

RELATIVE COST LOW ++

MEDIUM -

HIGH --

DISPLAY SCREEN LCD’S ++

FLAT SCREEN -

MICA SCREEN --

WITHSTANDINGVOLTAGE

FLUCTUATION

MORE THAN 50 V ++

20 V< A< 50 V -

LESS THAN 10 V --

RELABILITY IN OPERATION MORE THAN 5 YRS ++

5YRS <A < 3 YRS -

LESS THAN 3 YRS --

ENVIROMENTALSPECIFICATION

COMPLETELY ROBUST ++

AFFECTED BY HOSTILE ENVIROMENT

-

AFFECTED BY REGULAR CHANGE IN ENVIRONMENT

--

morphological chart

features Usage Examples

Definition (lines)

Interlaced (fields)

hz

Progressive (frames)Rate (HZ)

Low; MP@LL LDTV, VCD

240; 288 (SIF)

24, 30; 25

Standard; MP@ML

SDTV, SVCD,

DVD, DV

480 (NTSC, PAL-M

60 24 30

576 (PAL, SECAM

50 50

Enhanced EDTV 480; 576 60; 50

High; MP@HL

HDTV, Blu-ray

Disc, HD DVD, HDV

720 24, 30, 60; 25, 50

1080 50 60 24, 30; 25

CONCLUSION

• In the advances in display technology, there are now several kinds of video displays used in modern TV sets:

• Rear Projection (RPTV): Most very large screen TVs (up to 254 cm (100 inch) and beyond) use projection technology. Three types of projection systems are used in projection TVs: CRT-based, LCD-based, and DLP (reflective micromirror chip) -based, D-ILA and LCOS-based. Projection television has been commercially available since the 1970s, but at that time could not match the image sharpness of the CRT; current models are vastly improved, and offer a cost-effective large-screen display.

• A variation is a video projector, using similar technology, which projects onto a screen. This is often referred to as "front projection".

.

• CRT (cathode-ray tube): The most common screens were direct-view CRTs for up to roughly 100 cm (40 inch) (in 4:3 ratio) and 115 cm (45 inch) (in 16:9 ratio) diagonals. These are the least expensive, and are a refined technology that can still provide the best overall picture quality value. As they do not have a fixed native resolution, they are capable of displaying sources with different resolutions at the best possible image quality. The frame rate or refresh rate of a typical NTSC format CRT TV is 29.97 Hz, and for the PAL format, 25 Hz, both are scanned with two fields per frame in an interlaced fashion. A typical NTSC broadcast signal's visible portion has an equivalent resolution of about 640x480 pixels. It actually could be slightly higher than that, but the vertical blanking interval (VBI), allows other signals to be carried along with the broadcast.

• Flat panel (LCD or plasma): Modern advances have brought flat panels to TV that use active matrix LCD or plasma display technology. Flat panel LCDs and plasma displays are as little as 25.4 mm (1 inch) thick and can be hung on a wall like a picture or put over a pedestal. Some models can also be used as computer monitors.

• LED technology has become one of the choices for outdoor video and stadium uses, since the advent of bright LEDs and driver circuits. LEDs enable scalable ultra-large flat panel video displays that other technologies may never be able to match in performance.

• Each has its pros and cons. Flat panel LCD and plasma displays have a wide viewing angle (around 178 degrees) so they may best suited for a home theatre with a wide seating arrangement. Rear projection screens do not perform well in daylight or well-lit rooms and so are only suited to darker viewing areas.

• TV Widgets - latest in technology field, are here to rock the TV world and to give a new meaning to television watching. Now you can watch television, surf the web, and enjoy the features of small applications while watching your favorite shows on your favorite LCD or Plasma TV. You can have the ticker of stocks running at one side, a small window showing the current temperature of your city, you can check headlines from one corner. If you would like to have photos from your favorite program, you can capture them, make the slideshow and put on the TV

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