Chip on glass lcd driver technology

It usually connects to the mpu or mcu system via a standard serial or parallel electronic interface for example spi or i2c lcd drivers can be discrete chips implemented in standard semiconductor chip packages, with large io interconnects to a separate lcd glass via technology like elastomeric connectors or bonded flexible looms. Cof chip on film tcp tape carrier package which is the adhesion of chip onto a tape via ilb, which is then bonded onto the lcd panel. The ay0438 is used in applications ranging from industrial, consumer, telecom and automotive segmented. This touchcontroller takes information from the touch sensor and translates it into information that the pc or embedded system controller can understand. There are two ways of bonding driver ics and panels. Cog chip on glass based on a special proprietary process technology optimized for quality performance and high contrast, the amp display cog modules are the latest lcd technology. Nxp semiconductors today announced two new chip on glass cog lcd segment drivers the pcf8538 and pca8538 specifically designed for driving vertical alignment va displays. This chip is basically a smart peripheral, simple to use with only three control lines.

Ml1001 static lcd cog chip on glass driver is 40 segments lcd driver with gold bump. Chiponglass cog technology for lcd displays embedded lab. Hdg12864f3 chip on glass technology tft lcd, oled, graphic. R 10015 chiponglass cog a costeffective and reliable. It can drive up to 32 segments and has a low power operation. Gold bump is formed on the designed io pads of lcd driver ic with the height of 9 15.

At present, tcp tape carrier package is widely being used as a package for lcd driver ics. Nxp introduces the pca8538 chip on glass lcd segment driver specifically designed to drive va displays. It can be cascaded to form a single piece of 80 or 120 segments lcd drivers. These mcus meet low power design requirements including driving the lcd display in sleep mode as well as software contrast control for boosting or dimming. Segmented displays are used in a wide variety of applications, ranging from meters to portable medical devices to thermostats to exercise equipment. Segment displays earn the name glass only display because the majority of them are glass with small metal leads attached to both sides of the display. A light source projects white light onto a combination of mirrors that split the light into its three basic video colors. Cog chip on glass which is the direct adhesion of chip onto the lcd panel. Ay0438 is a cmos integrated device that drives a lcd, usually under the control of a microprocessor. Chiponglass lcd driver technology chip on glass cog. This module, provided by digikey and nxp, will provide an introduction to the nxp lcd driver portfolio, show the difference between segment drivers, character drivers and dotmatrix drivers. Nxp semiconductors describes the chip on glass technology cog in this whitepaper, whereby the integrated circuit driving the display mounts directly on the display glass, thus reducing the system cost.

Chip on glass lcd displays can display information as text or in a dotmatrix pattern. A pixel is considered to be on when enough electric. Cof chiponfilm was first introduced in 1998 as a replacement for tcp. We provide a full range of backend testing services for high density memory, mixedsignal and liquid crystal display lcd driver semiconductors. Gold bumping technology, which is a process precedent to tcp, cof and cog packaging, is a necessary interconnection technology for lcd and other flatpanel display driver semiconductors. A contact ledge which gives room for the lcd driver ic. A new cog technique using low temperature solder bumps for. They consist of a dcdc converter, a multicharacter by multiline display in 5 x 8 dot matrix format, and integrated controller driver circuitry using chip in glass cig technology to reduce ic count on the pcb.

Chiponglass lcd drivers for highresolution, vertical. Integrated segment lcd drivers microchip technology. This method of packaging cuts the amount of layers on the pcb and therefore reduces the board complexity and size. Chiponglass lcd driver technology executive summary progress in liquid crystal display lcd medical imaging technology has led to its increasing adoption for diagnostic viewing of medical images. With smd technology, the lcd driver ic and the physical display module are mounted on the printed circuit board pcb used by the microcontroller. Help identifying the driver chip number on my tft lcd shield. Cof chiponfilm technology for lcd driver ics using reel.

Chip on glass bonding with adhesive acp finetech bonder. This chip can either be located on a controller board inside the system or it can be located on a flexible printed circuit fpc affixed to the glass touch sensor. Hdg12864l7 chip on glass technology tft lcd, oled, graphic. Unlike typical lcd displays, cog displays dont have a builtin pcb board and instead have the ic directly mounted on the glass. Vertical alignment displays with chip on glass lcd segment driver. It is designed for cog chip on glass panel assembly, with an integrated touch screen display below 7 inches, making it ideal for compact and mediumsized portable devices such as tablet pcs and smart. Asgamorphous silicon tft gate driver circuit technology for. The tc3210 is designed for chip on glass cog panel assembly to support the new generation of sleek lcd panel modules. Highly integrated ultra low power lcd controllerdriver ics. The pca8539 is a singlechip lcd driver that generates drive signals for any static or multiplexed lcd with up to 18 backplanes, 100 segments, and graphics of.

Display driver market size, share, industry analysis and. Aimed at mobile terminal applications, the ste20xx range of lcd display drivercontroller chips offer the highest possible level of integration and low power consumption. An658 lcd fundamentals and the lcd driver module of 8. Vertical alignment displays with chiponglass lcd segment. Asgamorphous silicon tft gate driver circuit technology. We offer cost effective tn, stn, fstn, and cstn technology and complete engineering support services. Chiponglass technology for a simpler, and less expensive. Cog chip on glass displays are monochromatic passive or active matrix lcd displays that can display information as text or in a dot matrix pattern. Integration of gate driver circuit on glass substrate enables single chip and 3. The lcd pixels can be considered as a capacitor, so depending on the size of the lcd glass, capacitance can vary. Gold bump is formed on the designed io pads of lcd driver. Ds00000658bpage 3 an658 how an lcd works as explained in the previous section, the twist created in the lc fluid is the basis of how the panel operates. An658 lcd fundamentals and the lcd driver module of 8bit pic.

An lcd basically produces an output display by the switching of segments or pixels between on or off. Jul 09, 20 vertical alignment displays with chip on glass lcd segment driver. Direct driving of lcd display using general io features software driver for displays with one common line suitable for parts without on chip hardware for lcd driving control up to 15 segments using 16 io lines fully interrupt driven operation introduction as a low power alternative to leds and 7segment leddisplays, small liquid. Chiponglass cog is a flip chip bonding technology for direct connection assembly of bare integrated circuits on glass substrate by using anisotropic conductive film or. A display glass that represents the active display area. Find high quality chip on glass lcd suppliers on alibaba. Lcd chiponglass displays newhaven display intl digikey. This is one of the few new guaranteed to work or a replacement will be sent. Chip on glass lcd display chip on glass lcd technology and the benefits of character and graphic chip on glass displays. An658 lcd fundamentals and the lcd driver module of 8bit. The tc3318 is a low power, integrated display driver and touchscreen controller solution for fhd displays supporting up to 1080. After this type ic chip has been produced, a gold bump is placed on the ic chip and then sealed onto the polymide board. This type of module has the lcd glass mounted via a bezel to a printed circuit board pcb containing the lcd driver ics. Cof chiponfilm technology for lcd driver ics using.

A new chip on glass cog technique using flip chip solder joining technology has been developed for excellent resolution and high quality liquid crystal display lcd panels. Understanding touchscreen technology and design by steve kolokowsky, senior elect design engineer, and trevor davis, senior business development manager, cypress semiconductor corp. Nxp semiconductors chiponglass cog a costeffective and reliable technology 3. Choose an lcd mcu using the maps microchip advanced parts selector. Tape automated bonding ic mounting method uses the same type of integrated circuits as chip on glass technology gold bumped or flip chips. Developed to meet the low power design requirements. Chip on board cob construction is the most common type of lcd module on the market today. Related product highlight lcd character and graphic displays providing eight different backlight color options and low. The chip on glass feature is ideal for low power graphical applications that require a thin display module. The black circular area on the back of the display pictured below is the area where the lcd controller is housed on the display.

These vfd modules offer improved viewing angles, readability, and temperature ranges over their lcd counterparts. Providing high contrast, true black background, a wide viewing angle, and excellent image quality even at extreme temperatures, va displays offer many advantages, but typically require a higher lcd. Display driver market, by type display driver ic, touch display driver integration, by device smartphone, tablet, wearable, tv, automotive display, by technology lcd, oled, others, by package type chiponglass, chiponfilm global forecast till 2023. Cog is a very reliable and well established technology, and offers very thin profile lcd display modules at lower cost. Pca8530 automotive 102 x 4 chiponglass lcd segment.

New interface standard for largescreen tftlcd panels from. To realize such flexible displays, ddic display driver ic cof chip on film technology is a requirement. Mar 26, 2014 the pca8539 is a single chip lcd driver that generates drive signals for any static or multiplexed lcd with up to 18 backplanes, 100 segments, and graphics of up to 1800 display elements. The pca8547 is a fully featured aecq100 compliant liquid crystal display lcd driver, specifically designed for highcontrast vertical alignment va lcd with multiplex rates up to 1. Lcd chip on glass displays newhaven display designs custom chip on glass lcds in a wide variety of dot pixel formats. These new additions to microchips existing lcd microcontroller family complements an already extensive product portfolio by providing the greatest. Lcd chiponglass character displays newhaven display. This driver generates the drive signals for any static or multiplexed lcd containing up to four backplanes, 44 segments, and up to 176 elements. The construction of the display is similar to that of a sandwich. Although lcd monitors have many advantages over cathoderay tube monitors, cost continues to be a factor when medical professionals choose equipment.

Lcd fundamentals and the lcd driver module of 8bit pic. Chip on glass lcd suppliers, manufacturer, distributor. This stand alone lcd driver can drive up to 32 segments of arbitrary configuration and includes an on chip oscillator. Chiponglass lcd driver technology nxp semiconductors. Related product highlight lcd character and graphic displays providing eight different backlight color options and low power backlight for higher brightness per watt. In the flip chip technology, the chip is mounted upsidedown metal contacts down, providing a direct electrical connection to the io pads, eliminating the wirebonding step.

Ultra low power mcus 490na backup with rtc, 39uamhz active faster wakeup times and onthe fly user selectable. Lcd controller and driver ics pdd specializes in lcd modules and glass products. An lcd driver chip mounted directly onto the display glass. Tc3210 1932channel edp tcon embedded display driver. Alibaba offers 23 chip on glass lcd suppliers, and chip on glass lcd manufacturers, distributors, factories, companies. Chip on glass cog technology is a design methodology for lcd displays that offers several advantages over conventional surface mount device smd technology. Fsc lcds contain a chip on glass driver ic can also be used with a capacitive touchscreen. Lcs are affected by electric current and when a voltage. Microcontrollers with integrated lcd drivers can directly drive segmented displays with letters, numbers, characters and icons with up to 512 segments.

Chiponglass cog technology is an alternative design methodology in which the lcd driver is mounted directly on the display glass see figure 1b. Cog chip on glass is a method of directly mounting ddic onto a rigid glass substrate, whereas cof chip on film or cop chip on plastic is where the ddic is directly bonded onto the flexible substrate to ensure realization of. Anisotropic conductive film acf, is a leadfree and environmentally friendly adhesive interconnect system that is commonly used in liquid crystal display manufacturing to make the electrical and mechanical connections from the driver electronics to the glass substrates of the lcd. Moreover, 8bit pic microcontrollers with integrated lcd controllers are also introduced. A new cog technique using low temperature solder bumps for lcd driver ic packaging applications abstract.

Apr 15, 2011 this module, provided by digikey and nxp, will provide an introduction to the nxp lcd driver portfolio, show the difference between segment drivers, character drivers and dotmatrix drivers. Lcds are used for cell phones, laptop pcs, monitors and television, and. Lcd segment drivers support any static or multiplexed lcd containing up to a certain number of segments or icons. Tc3318 integrated multitouch controller and display driver. It is cascadable, has an on chip oscillator and is compatible for both cmos and ttl inputs. When this technology is applied to lcd panels due to the circuit board being glass, it is socalled chip on glass cog, and bonding of the flexible printed circuit fpc and glass lcd is called fog film on glass. The tc3210 provides a single chip display driver solution that replaces the traditional multi chip solution consisting of an edp tcon mated up with separate source driver chips.

This concept in the following referred to as cog concept reduces the number of tracks and layers on the. Chip on glass lcd drivers for highresolution, vertical alignment displays 26 march 2014 nxp semiconductors today announced the production rampup of two new chip on glass. Lcd 436 collectors this is one of the rarest new chips in the market. Development made simple gui intelligent tft lcd modules. It targets at custom tn lcd cog module product which requires the best quality of tn lcd technology. The three color images are combined using a prism to form a fullcolor image consisting of millions of colors. Lcd chiponglass character displays newhaven display intl. In january 1989, epson launched its first 3lcd projector, the vpj700. Anisotropic conductive adhesive aca what takes place in this sandwiched interface is depicted on the next slide. The material is also available in a paste form referred to as anisotropic conductive paste.

Depending on the number of segments that need to be driven, additional driver chips may be required if there are a large number of segments to drive refresh. But in this paper we can implement a qvga asi tft lcd panel with 1 chip, 3 side free architecture by integrating gate driver circuits on glass. Since chip on glass cog displays dont have a builtin pcb board, the integrated controller ic is directly mounted on the glass of the display. Vary the contrast on the lcd to account for different operating conditions such as temperature, lighting and humidity. Support any lcd dot matrix displaying some lines of characters in 5 x 8 dot format through an onchip character generator rom. This more than doubles the overall thickness of the display. Jul 30, 2004 samsungs new currentmode interface of cascade chip on glass cog chip on film cof cicc standard uses a new technology for data transfer where the lcd driver ic the source driver is. A 8 bit parallel interface is provided to directly interface to a microprocessor mpu. Cog reduces the overall system cost but requires close coordination between lcd design and ic module manufacturer.

A seal ring around the display glass which protects and seals the display glass. Prominent features of the lcd driver module of these. Fsc lcds contain a chiponglass driver ic can also be used with a capacitive touchscreen. Biasing using resistor ladder external resistor ladder one of the simplest ways to generate the bias voltages is to use a resistor ladder on the board. Help identifying the driver chip number on my tft lcd shield read 4672 times previous topic next topic. Pic microcontrollers with integrated lcd driver module. Invaluable for portable applications especially when the battery level drops. Whereas today, manufacturers often implement lcds by connecting a cased 1 lcd driver integrated circuit with the physical display via a pcb, cog technology is an alternative design methodology in which the lcd driver mounts directly on the display glass. Cof chip on film technology for lcd driver ics using reeltoreel system kenji toyosawa nakae nakamura kazuhiko fukuta yasunori chikawa module assembly application engineering dept.

Each lcd chip takes the electrical signal it receives and creates an image. Nxp two new chiponglass lcd segment drivers the pcf8538. The drive connection is made using either fixed pins or elastomer connectors. Sharp first began using tcp assembly processes for lcds in 1985, and we have developed a number of tcp technologies, becoming a leader in the tcp industry. Nxp semiconductors describes the chiponglass technology cog in this whitepaper, whereby the integrated circuit driving the display mounts directly on the display glass, thus reducing the system cost. However, it is possible to add a pcb printed circuit board or a controller driver chip ic. After lcd panel module factory acquires ic, the gold bump of the ic is bonded. The adhesive along the edges is used to attach the tab to the lcd glass andor pcb. Unlike typical lcd displays, cog displays dont have a builtin pcb board and instead have the ic directly mounted on the glass of the display. Microcontrollers with integrated lcd drivers can directly drive segmented displays with letters, numbers, characters and icons. Im having some issues trying to get my tft lcd screen for my arduino uno working. Vertical alignment displays with chiponglass lcd segment driver.