LCD SCROLLING AND TECHNOLOGY WITH CLEAR DIMENSIONS
- 1. WELCOME
- 2. Electronics and communication engineering SRINIVASA INSTITUTE OF ENGINEERING AND TECHNOLOGY Batch ● O.Anusha(21403-EC-042) ● J. Shanmukha Siva sankar(21403-EC-028) ● N.Karthik(21403-EC-041) ● P.Prasanna(21403-EC-044) ● P. Vallibaba(21403-EC-046) Guide Ms. G. Baby DRIVE CUT FOR AUTOMATIC LCD
- 3. ABSTRACT • A liquid crystal display, or LCD, is a video display that utilizes the light modulating properties of liquid crystals to display pictures or text on a screen.Since their invention in 1964,LCD screens have grown to be used in a very wide variety of applications,including computermonitors,television, and instrument panels. • A liquid crystal display is a thin, flat display device made up of any number of pixels arrayed in front of a light source or reflector. • It uses very small amounts of electric power, and is suitable for use in battery-powered electronic devices. • Colour displays are possible by incorporating colour filters. • The heart of all liquid crystal displays (LCDS) is a liquid crystal itself. A liquid crystal is a substance that flows like a liquid, but its molecules orient. themselves in the manner of a crystal.
- 4. INTRODUCTION • LCD (Liquid Crystal Display) is a type of flat panel display which uses liquid crystals in its primary form of operation. LEDs have a large and varying set of use cases for consumers and businesses,as they can be commonlyfound in smartphones,televisions,computermonitors and instrument panels. • LCDs were a big leap in terms of the technologythey replaced,which include light-emitting diode (LED) and gas-plasmadisplays. LCDs allowed displays to be much thinner than cathode ray tube (CRT) technology.LCDs consume much less powerthan LED and gas-display displays because they work on the principle of blocking light rather than emitting it. Where an LED emits light, the liquid crystals in an LCD produces animage using a backlight
- 6. LCD USE • liquid crystal display (LCD),electronic display device that operates by applying a varying electric voltage to a layer of liquid crystal, thereby inducing changes in its optical properties. LCDs are commonly used for portable electronic games, as viewfinders for digital cameras and camcorders, in video projection system,for electronic billboards,as monitor for computers,and in flat pannel television.
- 7. LCD COMPONENTS The basic display using liquid crystals is composed of six main components • A polarizing filter • A glass plate that has a transparent electrode pattern • The liquid crystal material • A clear common electrode on glass • A polarizer whose axis is crossed compared to the first polarizer • Either a reflective surface
- 8. BLOCK DIAGRAM OF LCD SCREEN
- 9. LCD CONTROLLER • A controller board is a piece in an electrical circuit that interfaces with a peripheral object by connecting the computer to it. The connection may be with other computer parts, such as the memory controller, or with an external device, like a mouse, that acts as a peripheral controller for an operation of the original device.
- 10. LCD PANNEL • LCD is a combination of two states of matter, the solid and the liquid. The solid part is crystal and this liquid and crystal together make the visible image. LCD consists of two layers which are two polarized panels- filters and electrodes. • The LCD controller board is often called the analog/digital (A/D) board. • As a type of hardware processor, it allows for various video source inputs to be connected, selected, and displayed on the LCD screen. It does this by converting the different video input signals into a format manageable by the LCD panel.
- 11. BACKLIGHT • Backlights are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in smart phones, computer displays and LCD televisions to produce light in a manner similar to a CRT display.
- 12. 7-SEGMENT • This 7-segmentdisplay driver which is known as a Binary Coded Decimal or BCD to 7-segment display decoder and driver, is able to illuminate both common anode or common cathode displays. But there are many other single and dual display drivers available such as the very popular TTL 7447.
- 13. WORKING HEADING
- 14. LCD WORKING • A display is made up of millions of pixles. The quality of a display commonly refers to the number of pixels; for example, a 4K display is made up of 3840 x2160 or 4096x2160 pixels. A pixel is made up of three subpixels; a red, blue and green—commonly called RCB. When the subpixels in a pixel change color combinations, a different color can be produced. With all the pixels on a display working together, the display can make millions of different colors. When the pixels are rapidly switched on and off, a picture is created. • The way a pixel is controlled is different in each type of display; CRT, LED, LCD and newer types of displays all control pixels differently. In short, LCDs are lit by a backlight, and pixels are switched on and off electronically while using liquid crystals to rotate polarized light. A polarizing glass filter is placed in front and behind all the pixels, the front filter is placed at 90 degrees. In between both filters are the liquid crystals, which can be electronically switched on and off.
- 15. WIFI CONTROLLER • A wireless LAN controller (WLC)is a network device used to monitor and manage wireless access points in an organization. WLCs are connected to routers and allow devices from across the organization to connectto the router via access points. WLCs are generally used in combinationwith the Lightweight AccessPoint Protocol(LWAPP)to manage light-weight access points in bulk by the network administrator or network operations center. The wireless LAN controller is part of the Data Plane within the Cisco Wireless Model. • The WLANcontroller automatically handles the configuration of wireless accese-points It centralizes wireless network infrastructure and handles bandwidth allocation to the access points (APs). Before the use of WLCs were widespread,APs had to handle connections individually, leading to unstable data links and poor connections.The use of WLCs solves this problem.
- 17. LCD SCREEN
- 19. LCD SPECIFICATIONS •Touch Type. LCD displays have various touch technologies, including. •Brightness (Luminance) . •Backlight Longevity. •Temperature Range. •Color Depth. •Viewing Angle and Technology. •Dimensions and Areas. •Response Time.
- 20. ADVANTAGES • An LCD cell consumes only microwatts of power over a thousand times less than LED displays. • LCDs can operate on voltages as low as 2 to 3 V and are easily driven by MOS IC drivers.
- 21. DISADVANTAGE • They cannot be seen in the dark, • They have a limited viewing angle; • They can be operated in limited temperature range.
- 22. APPLICATIONS • LCDs with a small number of segments, are used in digital watches and pocket calculators, Small monochrome displays in personal organizers, or older laptop screens High-resolution color displays such as modern LCD computer monitors and televisions.
- 23. CONCLUSION • The flat screen itself is, except in laptops, still regarded as an investment item. People are unwilling to buy flat until their existing CRT expires. For reliability at present LCDs have the edge over plasma for small screens but in the giant screen TV market in particular Plasma is the only option. A 60-inch LG television is currently retailing at £15 000 which is slightly out of the price range of the average consumer but certainly is a very desirable item. The future of the flat screen is probably going to be based on the LCD for at least another few years until emissive displays reach their full potential, both in size and reliability. Unless these factors are significantly more favourable than those of current flat screen technology there may be an unwillingness to switch to these materials. If a good performance is seen then obviously organics will win out due to cost and ease of manufacture. I feel that by the end of the decade the future of plastic screens will have been decided one way or another.
- 24. Future scope MarketOverviewof GlobalLCD Display panelmarket: • According to our latest research, the global LCD Display Panel market looks promising in the next 5 years. As of 2022,the global LCD Display Panel market was estimated at USD million and it’s anticipated to reach USDmillion in 2028, with a CAGR of Percentduring the forecastyears.This report covers a research time span from 2018 to 2028,and presents a deep and comprehensive analysis of the global LCD Display Panel market, with a systematical descriptionof the status quo and trends of the whole market, a close look into the competitive landscape of the major players, and a detailed elaboration on segmentmarkets by type, by promising in the next 5 years.As of 2022,the global LCD display panel market was estimated at USD million,and it’s anticipated to reach USD million in 2028,with a CAGR of percentduring the forecastyears.
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