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This one is certainly a USB device - most of modern laptop touchscreens are - so most of the laptop webcam reuse tips will apply. I need to find VCC, D+, D- and GND. There"s 4 pins on the connector, so I don"t have to worry about pins like EN and RST being present - they are on some touchscreens, but not this one.

The connector receptacle isn"t something that I have a plug for when looking through my collection of random wire ends. This means I have to solder to the touchscreen board, sadly.

I didn"t have 1 and 2, so I had to resort to 3. Asus X200CA doesn"t have schematics available but there"s boardview files. With OpenBoardView and the FZ key, I was able to open the boardview file and browse it. Now, where do I find the touchscreen connector?

Sometimes the touchscreen cable is a separate cable, and sometimes it"s the same cable that also carries the display signals, and I need to know this to know which connector to look for touchscreen signals on. I looked up "x200ca cable" on eBay and found this:

Looks like exactly the cable we need, one connector (right) is the kind of connector that plugs into our touchscreen controller board, and another one (left) is a Molex connector often used in laptops. So, the touchscreen has a separate connector. I could look up an "Asus X200CA teardown" video on YouTube and see exactly where that wire goes, but I saved a bit of time by googling "X200CA motherboard" and looking at images:

The pinout, however, has to be determined. I usually take a multimeter, find GND, then VCC, then USB D+ and D- - as the latter are hard to tell apart, I try them in one polarity and swap them if they don"t work.

GND is likely to be at the screw hole - checking with a multimeter, there"s indeed connectivity between one of the pins on the 4-pin connector and the metal around the screw hole. It also is connected to all of the capacitors on the board, so that cements it, we found GND. I won"t solder a wire to the screw hole itself, but instead to one of the other GND points on the board.

VCC is very prominent on this board, it"s a thick trace going somewhere to the right from the connector. Even the connector"s mechanical pins are connected to VCC and not to GND, as usual - not that it matters this time.

Now, I just connect wires from my small microUSB+3.3V breakout board to the touchscreen, and, after swapping D+ and D- wires once (at the breakout, not at the connector), it works:

Nokia manufactures a wide variety of cell phones and many of their cheaper phones contain simple LCD"s which may be used in microcontroller projects.  There is one particular LCD model that is used in a wide variety of their phones and is often referred to as simply a "Nokia LCD", or "Nokia 6100 LCD".  I used to use a Nokia 2600 phone and whenever I upgraded I took the Nokia apart to remove its LCD.  This LCD appears to be the same one that is sold as "Nokia 6100 LCD" and I was able to get it up and running with a bit of work using an AVR.

You will need some sort of breakout board in order to connect the display.  Sparkfun sells several (a standard breakout, an Arduino shield, an Olimex module, etc) as well as the bare surface-mount connector.  Since all of SparkFun"s boards include the LCD, I just bought the connector and made my own breakout board since I already had the LCD.

If you don"t have a breakout board, you need to first make some sort of connector for the LCD.  My first attempt was to solder thin magnet wire to each leg of the connector with a fine-tip soldering iron.  This took several tries but eventually I got it connected.  I then applied generous amounts of super glue to make sure it wouldn"t come apart and soldered on some thicker wires to connect to the microcontroller.

For cleaner and more practical uses, I eventually made a small breakout board for the connector that can be printed and etched using the laser printer toner transfer method.  Make sure not to put too much pressure on the transfer or the traces can be pressed together.  If this happens, you can try cutting the toner away with a sharp knife, but you"ll probably end up breaking the toner trace and have to start over.

I hand-soldered the connector to the finished PCB and then added some breakaway pin headers so that the board may be breadboarded or socketed into projects while being easily removable.

After you have a breakout board for the LCD connector, you must connect it to your circuit.  There are 10 pins on the connector, one is unused.  The LCD has four control signals (Clock, Data, Reset, Chip Select), two 3.3V inputs, two grounds, and a backlight input.  The LCD driver circuitry runs on 3.3V as do the control signals.  However, the backlight requires a higher voltage around 7V.  Using a 1K ohm resistor between the backlight power and a 12V power supply seems to work well, the voltage is around 6-6.5V which makes it bright enough to use.

Since the LCD protocol is 9-bit SPI, you cannot use the hardware SPI interface found on many microcontrollers (including the AVR series microcontrollers) as they often only support 8-bit mode.  This means that you will probably have to implement a software SPI output.  Electrically, this means you can connect the four control lines to any unused I/O pins on your microcontroller.  Your microcontroller must be running at 3.3V to connect the lines directly, otherwise add 10K ohm resistors on each line to limit the current going into the LCD.

The LCD has many functions that are available by sending commands over the SPI interface.  The important ones are explained here and will allow you to get your LCD up and running.  A full set of commands is listed in the PCF8833 datasheet here:

Before you can write to the LCD, it must be initialized.  First, the Reset line must be pulled low for around 100ms and then raised high again.  The Reset line must remain high during operation.  Then, a sequence of commands must be sent, in the following order:

Continuing with the protocol, once the LCD is initialized it is ready to draw.  Drawing works by first defining a region to draw and then streaming pixel data to fill that region.  It is confusing at first, but if done properly is more efficient than pixel-by-pixel drawing.  A region is simply a rectangular area on the screen.  We"ll say it begins at point (X1,Y1) and ends at point (X2, Y2).  Once defined, the LCD controller will fill in pixels from left to right starting at (X1, Y1).  When it reaches the edge of the region, it will jump to the next line [in my example, (X1, Y1+1) ].  It does this until it reaches (X2, Y2) at which it stops accepting data.  If you only want to draw one pixel, you simply set (X1, Y1) and (X2, Y2) to the pixel you want to draw.  This defines the region as a single pixel.  Any data sent after the first pixel"s worth of data is discarded.

To implement the 9-bit protocol using an AVR, I found a nice ASM function in the SparkFun example code.  I modified the code some to clean it up and adapt it for the Phillips controller.  This ASM code is more efficient than using regular C and allows faster LCD writes.

Rectangles are incredibly useful.  You can draw one big rectangle to clear the screen, use them for menu elements, indicators, check boxes, frames, text backgrounds, and much more.  Thankfully they are easy to draw on the Nokia LCD"s.  All you need to do is define a region the size of the rectangle and fill it in with a solid color.  The following AVR C code (using the functions described in the last section) will do this.

Although this is a graphical LCD, it is still useful to be able to print text to it.  Unlike character-based LCD"s, graphical LCD"s do not contain a character map or font table or anything.  To print text to a graphical LCD, you must define your own font table in your code and then print it character-by-character using the table.  In my code, I have provided a font table (one that I converted by hand because I couldn"t find a good program to do it for me).  The font is 6x8 which should allow you to fit plenty of text on the screen.  I have provided functions for printing characters as well as strings.

With rectangles and text down, we can begin making truly useful stuff.  Menus allow users to select from a large number of options with only a few buttons (Up, Down, and Select are common).  To make a menu that looks good, you need to format your screen and text properly.  I wanted a single title line and the rest to be menu entries.  The LCD is 130x130 (usable) pixels in resolution.  This means that I have 130 vertical pixels to divide up into menu lines.  Since my font is 8 pixels tall, I decided that using 10-pixel-tall menu lines would be good.  This gives a 1 pixel border around the text on top and bottom, 13 total menu lines (1 title + 12 entries), and up to 21 characters per menu line.

When drawing moving objects on the LCD, you can greatly speed up the frame rate and eliminate screen glitches by only redrawing the moving parts of an object rather than redrawing the entire screen or entire object.  For instance, if a ball is moving across the screen, rather than redrawing the entire ball you can just draw the pixels along the edge that has moved and clear the pixels on the edge that has moved away.  Techniques such as frame buffering and double buffering can be used, where a new frame buffer is compared against an old frame buffer and only differing pixels are written to the display.  However, given the limitations of AVR and similar 8-bit microcontrollers, these techniques are probably out of range.  If you are using an ARM or other 32-bit microcontroller with a higher performance CPU, more RAM, etc. then you can take advantage of double buffering for a much more efficient screen drawing system.

It is actually very easy to draw full color photos on the LCD!  I simply used the serial port to transfer the image from the PC to the AVR which displays it on the LCD.  To convert the image into the correct format, I wrote a small application in Visual Basic (VS 2010) that takes a 130x130 .bmp formatted image and transforms it into the 12 bit per pixel color format needed to display on the LCD.  The Visual Basic VS2010 project is included with the code package at the end of this Instructable.

I have posted example code for both AVR and 8051 microcontrollers as I have used the LCD with both.  The code was originally written for ATMega168 based on the SparkFun examples for both the LCD and Arduino LCD Shield.  I added text and menus then ported it to 8051 for use on my 8051 project board.  I then revised many systems which have been backported into the AVR code.

Have you had luck with your project? I am not familiar, but it appears the display in such vehicles is usually not an LCD of any kind, but a vacuum fluorescent discharge tube display, VFD. It"s a collection of thin shaped glass vacuum tubes that are coated with a Luminophore on the inside that determines their colour; correspondingly, while they can be manufactured in various colour, their colour can not be changed afterwards. I am not aware of any possibility to get a custom one-off VFD made for you.

It"s possible to reverse engineer the signals driving the display, and then create a drop in replacement, based on a microcontroller interpreting the signal and driving a graphic display of some kind, an LCD or OLED. With OLED, there is the question of suitability to vehicle use. The displays aren"t intended to run for hours on end, they degrade with use. Also their brightness is typically 10 times weaker than VFD. Also very few colours are available, you may be stuck with a colour that is more similar to that of VFD blue than your chosen LED blue. With LCD, there is an aesthetic issue with lowered contrast and potentially bad viewing angles. Monochromatic LCDs usually allow replacement of LEDs lighting them, and also LCDs with adjustable RGB backlight are available. An advantage of using a graphic display on a microcontroller is that you are not stuck with static symbols, you can adorn them with effect graphics, such as the frame of PRNDL gliding across the display or magnifying the currently active mode, beautiful, easily legible font for your odometer, etc.

Do you have a photograph of your display at hand so i know whether i"m thinking in the right direction? I am thinking of a display which has PRND321, a set of 7-segments for odometer, a couple of extra symbols around, but no text capability. If you have text dot matrix display which has distinct single-pixel spaces between the characters, it"s likely an HD44780 signal-compatible VFD, and you can get HD44780 LCD replacements. They come with width of 8, 16, 20 and 40 characters and height of 1, 2 and 4 lines.0

I could not find pictures I took when I disassembled. I attached some I found online and believe it to be a VFD. On this one, It turns out the illumination color is by a colored thin plastic film on the panel. Illuminated without the panel and it is white.

The "Message Center" appears to be an LCD it illuminates 2 colors, orange for some advisements, red for others i.e. low battery. I would like to change the color to blue or maybe green when it lights up as part of normal starting and vehicle going thru its checks. Any thoughts you have on this would be greatly appreciated.

Message center is a monochrome graphics LCD. You shall probably find some SMD LEDs on the board beneath it, that can be replaced. I am not familiar with specific display model employed, nor are there any data sheets - it has apparently been manufactured by Optrex Corporation, Japan, specifically for use by a division of General Motors, and has not been available generally or used anywhere else. Most companies wouldn"t be caught dead ordering or a 45x28 LCD. For reference, the display model designation is DMF-50796H. If it"s anything like i imagine it to be, there should be a metal shield retained by twisted tabs on a PCB, and merely removing the shield should give you access to the LEDs.

An interesting hack, with possibility of grand destruction, is inverting the LCD. On top of the glass is usually a polarization film that can be peeled off and replaced with one mounted 90° off-angle. Tough luck if the filter is instead sandwiched between glass layers.

Dear friends,i have nokia 2600c2 and nokia 2700c mobile. I need lcd datasheet used in these mobile. Do any budy have any idea where can i find it. I tried google but no use.2

Hello, I found out that which I was using was not a PCF8833 driven display but a ST7628. I wonder if the connector pinout is the same in both display types.

I read that it can be easily controlled via any 3 wire interface (which I am planning to software implement with a sort of loop till get a kind of 9-bit serial with enable/disable) in the datasheet, but as it"s the driver datasheet it only shows the whole driver IC pinout instead of the 10 pin nokia LCD connector. I don"t know how to connect it, I am afraid of damaging it. The display is currently working (with the phone) so if I could connect it, then it should work or show anything more than a black background.

i am doing a project on high speed photography controller. in which i have to interface nokia 6100 lcd with the ATMEGA 32 IC for setting parameters. i have the nokia 6100 LCD, but have few questions

I posted the pinout as well as the commands. The circuit is described above as well, it"s pretty simple if you take the time to look at the documentation of the LCD and read through the code. Note that Instructables is not in any way a professional help organization for your immediate needs, and no, I will not contact you in dire emergency because you didn"t read the code or pinout all the way through, because you would"ve learned all 3 of those things by doing so. Plus, no two setups are exactly the same, you can"t expect me to spit out your particular circuit...you have to do some of the work yourself!0

A close look at the video input interfaces used in LCD monitors. With the emergence of a new generation of interfaces, growing numbers of LCD monitors feature multiple and different interfaces. Image quality and ease of use are likely to depend on how well the user knows and uses the unique characteristics of each interface when connecting the appropriate devices.

Note: Below is the translation from the Japanese of the "IT Media LCD Display Course II, Part 2," published on December 16, 2008. Copyright 2011 ITmedia Inc. Information about Mini DisplayPort was added to the English translation.

Driven by demand for higher-resolution monitor environments and the proliferation of high-definition devices, the types of video input interfaces ("interfaces" hereinafter) found in LCD monitors continue to proliferate. More than likely, significant numbers of users encountering LCD monitors incorporating multiple input systems have wondered what to connect to which terminal. In this article, we"ll discuss, one by one, the main interfaces used today. But first, let"s give an overview of the types of interfaces available.

The interfaces for LCD monitors designed for use with PCs can be grouped into two categories: analog interfaces, carryovers from the days of CRT monitors, and the digital interfaces developed more recently. An analog interface involves the additional steps of conversion of digital signals within the PC to analog signals for output and the conversion of these analog signals back into digital form by the LCD monitor receiving the signal. This series of actions can degrade image quality. (Image quality also depends on the quality of the route used in converting from analog to digital.) A digital interface offers superior image quality, since it transmits digital signals without conversion or modification.

LCD-monitor interfaces also can be grouped by differences in the devices connected. Major categories here are inputs from PCs and inputs from audio-video (AV) devices. PC input generally involves one of the following five interface types: D-Sub for analog connections; DVI-D for digital connections; DVI-I, which is compatible with both analog and digital connections; and HDMI and DisplayPort, representing the new generation of interfaces for digital connections. Other more recent adapters input and output PC RGB signals and LCD monitors using USB as a video input interface.

It"s worth noting that while HDMI was designed for use with AV input and output, the standard also supports PC input and output. LCD monitors incorporating HDMI ports include some that support PC input officially and others that—whether or not they can display PC input—do not support PC input officially.

Known officially as D-Sub miniature, D-Sub is not exclusive to display use. It"s also used for serial-port, parallel-port, SCSI, and other connectors, with the number of connector pins depending on the purpose of use. However, these connector standards are rarely if ever found in PCs now for general-purpose personal use, most such applications having migrated to USB.

When used as a monitor interface, a D-Sub port is also known as a VGA port, an analog connection standard that"s been around for some time. The connector is a DE-15 connector with 15 pins in three rows, often referred to as a "mini-D-Sub 15-pin" or "D-Sub 15-pin" connector. (Some connectors omit unused pins.) D-Sub is currently the most widely used monitor interface, compatible with very large numbers of PCs and LCD monitors.

A D-Sub female connector (photo at left) installed on the monitor side and a D-Sub male connector (center photo) on the cable side. A D-Sub cable features a screw on each end of the connector that can be turned by hand to prevent unintended disconnection (photo at right).

The Digital Visual Interface (DVI) standard uses one of three types of connectors: DVI-D for digital connection; DVI-A for analog connection; and DVI-I, compatible with both digital and analog connections. The DVI-A connector for analog use is not in general use and can be disregarded when choosing monitor products.

Keep in mind that there are two types of mainstream DVI-D digital connections: single link and dual link. For a single-link DVI-D connection, the maximum resolution that can be displayed is 1920 × 1200 pixels (WUXGA). Higher resolutions (such as 2560 × 1600 pixels) require a dual-link DVI-D connection providing double the bandwidth of a single-link DVI-D (7.4 Gb/second or higher). To use a dual-link DVI-D connection, the DVI-D input on the LCD monitor side, the DVI-D output on the PC side, and the DVI-D cable must all be compatible with the dual-link DVI-D standard.

DVI-I, the other DVI standard, can be used with both digital and analog connections, depending on the monitor cable used. Since a DVI-I analog signal is compatible with the D-Sub standard, an analog connection can be formed by using a monitor cable with a D-Sub connector on one end and a DVI-I connector on the other. Depending on the cable and the connectors on the PC side and on the LCD-monitor side, it may also be possible to use an adapter for connecting a DVI-I connector with a D-Sub connector.

A DVI-D female connector installed on the monitor side (photo at left) and a DVI-D single-link (18-pin) male connector installed on the cable (center photo). As with D-Sub cables, a DVI-D cable can be secured into place by turning the screws on either end of the connector (photo at right).

Monitor cables with DVI-I connectors on both ends were available at one time. These are rare today, since this configuration made it difficult to determine whether the connection was digital or analog and generated frequent connection issues. Having DVI-I connectors on both the PC side and the LCD monitor side can lead to confusion. In such cases, the ideal configuration is a digital connection made with a DVI-D cable.

The shapes of HDMI, DisplayPort, and Mini DisplayPort connectors resemble that of a USB series-A connector (on the side of the USB host, such as a PC). The connectors lack screws, allowing the cables to be readily inserted and removed. (The disadvantage: This makes it easier to dislodge a cable connection if a hand or foot catches on the cable.)

At left is an HDMI (type A) female connector; in the middle is a DisplayPort female connector; at right is a Mini DisplayPort female connector. The HDMI connector has 19 pins. The DisplayPort and Mini DisplayPort connectors have 20 pins and an asymmetrical (left to right) connector. (The HDMI standard also defines a 29-pin type-B connector compatible with resolutions exceeding 1080p.)

Another feature is that HDMI, DisplayPort, and Mini DisplayPort video signals can be converted back and forth with the DVI-D standard, a PC digital interface. Using the appropriate conversion adapter or cable, we can output video from a DVI-D, HDMI, DisplayPort, and Mini DisplayPort connector and input to any of these options. Currently, however, this implementation appears to be imperfect: In certain cases, input and output devices are not completely compatible (i.e., video does not display).

An HDMI (type-A) female connector (photo at left) and male connector (center photo). The compact HDMI cable is easily connected and disconnected, just like a USB cable (photo at right). HDMI cables come in two types: Standard (category 1), denoting those that have passed 74.25 MHz in transmission-speed tests, and High Speed (category 2), denoting those certified for 340 MHz. A High Speed cable is recommended when using high-definition signals such as 1440p.

DisplayPort female (photo at left) and male (center photo) connectors. Although a DisplayPort cable resembles an HDMI cable, it has two hooks at the top of the connector to make it harder to disconnect accidentally (photo at right).

Since DisplayPort is a serial interface like PCI Express that generates a clock from the data instead of using external clock signals, data transmission speeds and functionality are easily improved. In addition, since DisplayPort employs a configuration wherein the LCD monitor is operated directly, it makes it possible to reduce the numbers of components. Another benefit is its ability to transmit signals over distances of up to 15 meters.

A component video port has separate connectors for each of the three video-signal types: A green connector for the Y signal, a blue connector for the Pb (Cb) signal, and a red connector for the Pr (Cr) signal. In most cases, the compatible video formats are 480i, 480p, 720p, and 1080i, with connectors labeled Y, Cb, and Cr compatible with 480i video and connectors labeled Y, Pb, and Pr with higher-quality video formats.

While component video ports offer higher quality and greater benefits than most other types of analog video input, they also entail inconveniences, including more troublesome connections (since they use three connectors) and greater space requirements on devices equipped with such ports. Additionally, they are incapable of transmitting control signals. In Japan, the D-Terminal standard, formulated by the Japan Electronics and Information Technology Industries Association (JEITA, known at the time as the Electronic Industry Association of Japan, or EIAJ), which features its own improvements on these points, has entered widespread use.

A D-Terminal connector combines the three types of component video signals into a single cable and is easier to connect. It also embeds a control signal to identify scanning lines, scanning method, and aspect ratio. (In passing, it"s called a D-Terminal only because its connector is shaped like the letter "D"; the "D" does not mean "digital." Signals flowing through the D-Terminal and the connecting cable are analog.) The table below gives the types of D-Terminals (D1 – 5) and corresponding video formats. While many products feature D5 terminals, which are compatible with 1080p video, this is not specified in the official JEITA standard.

D-Terminal female (photo at left) and male (center photo) connectors. Each connector end of a D-Terminal cable features a hook to prevent accidental disconnection (photo at right). The connector has 14 pins.

Comparisons of picture quality between component video and D-Terminal standards show that component video, with its three separate connectors, offers higher picture quality, due to structural characteristics of the cable and connector. Many believe this difference becomes even more marked with longer cables.

On an RCA connector with three single pins in a row, the yellow pin is the composite female connector (photo at left). Most composite cables assume the form of a single cable that splits into three connectors, with the yellow connector used for video and the red and white for stereo audio (center photo). An S-Video female connector (photo at right), which has four pins.

Most such products are adapters, which connect to the PC using USB and feature DVI-D or DVI-I connectors on the output side. These are then connected to LCD monitors. After the user installs a device driver, the PC recognizes the adapter as a monitor adapter. Users can create a multi-monitor environment in Windows by activating the secondary monitor connected to the adapter in Display Properties. In terms of display performance, these adapters are not well suited to uses that require high-speed response; they are associated with slight delays in reflecting mouse or keyboard operations.

A small number of LCD monitors on the market use USB as a video input interface, making it possible to output and display a PC screen through a USB connection between the PC and the LCD display. These, too, are ideal for laptops and netbooks, since they allow users to use laptops connected to large-screen LCD monitors at their office desks or at home, then use the laptops for mobile use when out and about simply by unplugging a single USB cable.

Pins20 pins for external connectors on desktops, notebooks, graphics cards, monitors, etc. and 30/20 pins for internal connections between graphics engines and built-in flat panels.

This is the pinout for source-side connector, the sink-side connector pinout will have lanes 0–3 reversed in order; i.e., lane 3 will be on pin 1(n) and 3(p) while lane 0 will be on pin 10(n) and 12(p).

The interface uses an LVDS signal protocol that is not compatible with DVI or HDMI. However, dual-mode DisplayPort ports are designed to transmit a single-link DVI or HDMI protocol (TMDS) across the interface through the use of an external passive adapter, enabling compatibility mode and converting the signal from 3.3 to 5 volts. For analog VGA/YPbPr and dual-link DVI, a powered active adapter is required for compatibility and does not rely on dual mode. Active VGA adapters are powered directly by the DisplayPort connector, while active dual-link DVI adapters typically rely on an external power source such as USB.

DisplayPort version 1.2 was introduced on 7 January 2010.Gbit/s in High Bit Rate 2 (HBR2) mode, which allows increased resolutions, higher refresh rates, and greater color depth, such as 3840 × 2160 at 60Hz 10bpc RGB. Other improvements include multiple independent video streams (daisy-chain connection with multiple monitors) called Multi-Stream Transport, facilities for stereoscopic 3D, increased AUX channel bandwidth (from 1Mbit/s to 720Mbit/s), more color spaces including xvYCC, scRGB, and Adobe RGB 1998, and Global Time Code (GTC) for sub 1μs audio/video synchronisation. Also Apple Inc."s Mini DisplayPort connector, which is much smaller and designed for laptop computers and other small devices, is compatible with the new standard.

DisplayPort version 1.2a was released in January 2013Adaptive Sync.AMD"s CES 2014 on a Toshiba Satellite laptop by making use of the Panel-Self-Refresh (PSR) feature from the Embedded DisplayPort standard,

When using only two lanes on the USB-C connector via DP Alt Mode to allow for simultaneous SuperSpeed USB data and video, DP 2.0 can enable such configurations as:

DisplayPort cables and ports may have either a "full-size" connector or a "mini" connector. These connectors differ only in physical shape—the capabilities of DisplayPort are the same regardless of which connector is used. Using a Mini DisplayPort connector does not affect performance or feature support of the connection.

The standard DisplayPort connector (now referred to as a "full-size" connector to distinguish it from the mini connector): §4.1.1 was the sole connector type introduced in DisplayPort1.0. It is a 20-pin single-orientation connector with a friction lock and an optional mechanical latch. The standard DisplayPort receptacle has dimensions of 16.10mm (width) × 4.76mm (height) × 8.88mm (depth).: §4.2.1.7, p201

The Mini DisplayPort connector was developed by Apple for use in their computer products. It was first announced in October 2008 for use in the new MacBooks and Cinema Display. In 2009, VESA adopted it as an official standard, and in 2010 the specification was merged into the main DisplayPort standard with the release of DisplayPort1.2. Apple freely licenses the specification to VESA.

The Mini DisplayPort (mDP) connector is a 20-pin single-orientation connector with a friction lock. Unlike the full-size connector, it does not have an option for a mechanical latch. The mDP receptacle has dimensions of 7.50mm (width) × 4.60mm (height) × 4.99mm (depth).: §2.1.3.6, pp27–31 The mDP pin assignments are the same as the full-size DisplayPort connector.: §2.1.3

Pin 20 on the DisplayPort connector, called DP_PWR, provides 3.3V (±10%) DC power at up to 500mA (minimum power delivery of 1.5W).: §3.2 This power is available from all DisplayPort receptacles, on both source and display devices. DP_PWR is intended to provide power for adapters, amplified cables, and similar devices, so that a separate power cable is not necessary.

To support a particular format, the source and display devices must both support the required transmission mode, and the DisplayPort cable must also be capable of handling the required bandwidth of that transmission mode. (See: Cables and connectors)

Limited adapter speed – Although the pinout and digital signal values transmitted by the DP port are identical to a native DVI/HDMI source, the signals are transmitted at DisplayPort"s native voltage (3.3V) instead of the 5V used by DVI and HDMI. As a result, dual-mode adapters must contain a level-shifter circuit which changes the voltage. The presence of this circuit places a limit on how quickly the adapter can operate, and therefore newer adapters are required for each higher speed added to the standard.

Single-link DVI only – Since DisplayPort dual-mode operates by using the pins of the DisplayPort connector to send DVI/HDMI signals, the 20-pin DisplayPort connector can only produce a single-link DVI signal (which uses 19 pins). A dual-link DVI signal uses 25 pins, and is therefore impossible to transmit natively from a DisplayPort connector through a passive adapter. Dual-link DVI signals can only be produced by converting from native DisplayPort output signals with an active conversion device.

Both HDMI and DisplayPort have published specification for transmitting their signal over the USB-C connector. For more details, see USB-C § Alternate Mode partner specifications and List of devices with video output over USB-C.

Mini DisplayPort (mDP) is a standard announced by Apple in the fourth quarter of 2008. Shortly after announcing Mini DisplayPort, Apple announced that it would license the connector technology with no fee. The following year, in early 2009, VESA announced that Mini DisplayPort would be included in the upcoming DisplayPort 1.2 specification.

Micro DisplayPort would have targeted systems that need ultra-compact connectors, such as phones, tablets and ultra-portable notebook computers. This standard would have been physically smaller than the currently available Mini DisplayPort connectors. The standard was expected to be released by Q2 2014.

Direct Drive Monitor (DDM) 1.0 standard was approved in December 2008. It allows for controller-less monitors where the display panel is directly driven by the DisplayPort signal, although the available resolutions and color depth are limited to two-lane operation.

Embedded DisplayPort (eDP) is a display panel interface standard for portable and embedded devices. It defines the signaling interface between graphics cards and integrated displays. The various revisions of eDP are based on existing DisplayPort standards. However, version numbers between the two standards are not interchangeable. For instance, eDP version 1.4 is based on DisplayPort 1.2, while eDP version 1.4a is based on DisplayPort 1.3. In practice, embedded DisplayPort has displaced LVDS as the predominant panel interface in modern laptops and modern smartphones.

eDP 1.0 was adopted in December 2008.Hz sequential color monitors, and a new display panel control protocol that works through the AUX channel.framebuffer memory in the display panel controller.Version 1.5 was published in October 2021; adds new features and protocols, including enhanced support for Adaptive-Sync, that provide additional power savings and improved gaming and media playback performance.

Internal DisplayPort (iDP) 1.0 was approved in April 2010. The iDP standard defines an internal link between a digital TV system on a chip controller and the display panel"s timing controller. It aims to replace currently used internal FPD-Link lanes with a DisplayPort connection.GHz clock and is nominally rated at 3.24Gbit/s per lane, with up to sixteen lanes in a bank, resulting in a six-fold decrease in wiring requirements over FPD-Link for a 1080p24 signal; other data rates are also possible. iDP was built with simplicity in mind so doesn"t have an AUX channel, content protection, or multiple streams; it does however have frame sequential and line interleaved stereo 3D.

SlimPort, a brand of Analogix products,Mobility DisplayPort, also known as MyDP, which is an industry standard for a mobile audio/video Interface, providing connectivity from mobile devices to external displays and HDTVs. SlimPort implements the transmission of video up to 4K-UltraHD and up to eight channels of audio over the micro-USB connector to an external converter accessory or display device. SlimPort products support seamless connectivity to DisplayPort, HDMI and VGA displays.Google"s Nexus 4 smartphone.LG G series also adopted SlimPort.

On 22 September 2014, VESA published the DisplayPort Alternate Mode on USB Type-C Connector Standard, a specification on how to send DisplayPort signals over the newly released USB-C connector. One, two or all four of the differential pairs that USB uses for the SuperSpeed bus can be configured dynamically to be used for DisplayPort lanes. In the first two cases, the connector still can carry a full SuperSpeed signal; in the latter case, at least a non-SuperSpeed signal is available. The DisplayPort AUX channel is also supported over the two sideband signals over the same connection; furthermore, USB Power Delivery according to the newly expanded USB-PD 2.0 specification is possible at the same time. This makes the Type-C connector a strict superset of the use-cases envisioned for DockPort, SlimPort, Mini and Micro DisplayPort.

Since its introduction in 2006, DisplayPort has gained popularity within the computer industry and is featured on many graphic cards, displays, and notebook computers. Dell was the first company to introduce a consumer product with a DisplayPort connector, the Dell UltraSharp 3008WFP, which was released in January 2008.AMD and Nvidia released products to support the technology. AMD included support in the Radeon HD 3000 series of graphics cards, while Nvidia first introduced support in the GeForce 9 series starting with the GeForce 9600 GT.

Nvidia revealed the GeForce GTX 1080, the world"s first graphics card with DisplayPort 1.4 support on 6 May 2016.Radeon RX 400 Series will support DisplayPort 1.3 HBR and HDR10, dropping the DVI connector(s) in the reference board design.

Dual-link DVI is limited in resolution and speed by the quality and therefore the bandwidth of the DVI cable, the quality of the transmitter, and the quality of the receiver; can only drive one monitor at a time; and cannot send audio data. HDMI 1.3 and 1.4 are limited to effectively 8.16Gbit/s or 340MHz (though actual devices are limited to 225–300MHzVGA connectors have no defined maximum resolution or speed, but their analog nature limits their bandwidth, though can provide long cabling only limited by appropriate shielding.

I am aware that there are better alternatives for screens that can be found for under £15. I was curious what was in a £15 quid projector and bought it for that reason. Disassembling it was fun and has already netted me lenses, heatsinks, and LEDs etc. for other projects which is worth more than its cost. The reason I asked was because a) I am loathe to bin the LCD and hence contribute to our electronic waste problems, and b) I am specifically looking for LEDs (most of the displays on eBay and Amazon are OLEDs) as I want to make an ESP32-controlled projector as a project. Non-OLEDs are difficult to find on eBay/Amazon nowadays. Hence I was asking on the off-chance that this screen might be similar to something else in Occidental part of the world that I could use.

From what you say it feels its very unlikely for there to be a shortcut and I"ll have decode the signals manually. Designing and manufacturing (or finding a 30 pin adapter) is not a problem but I can"t justify to myself spending the better part of my weekends in a month to decode the signals just to use it when I can spend £10 buying an SPI LCD from eBay which does the exact same thing. I"ll probably bite the bullet and do that.

Shame about having to bin the screen though. I have found the schematics for the GM8284DD chip and probably with a magnifying glass would be able to make out the LCD connections (RGB input etc.) on the circuit board but again, I"m not sure if its that cost-efficient spending that many weekends working on it...

The wiring connections to the screen would have to match between the old display and the new. By that I mean that the wires coming from the system board would have to perform the same functions when connected to the same points on the new display. For this you would have to know the internal wiring details of both the old and the new display panels. It would also have to have the same type of cable connector as well.

One way that might possibly work is to open the phone and see if there is a part number printed on the back of the LCD panel itself. Using just the number try searching online to see if you get results.

Most LCD panels be it for TV, Monitors , Phones etc., are made by specialist LCD panel manufacturers who make to order for the device manufacturer. Also don"t be surprised that even if you find the manufacturer that you will not be able to purchase it directly from them.

You could also search places like Ebay etc where your particular model phone may be offered for sale as faulty good for parts where it appears that the LCD screen is undamaged and possibly still working but cannot verify as the phone doesn"t work at all. You could always contact the seller and ask was it working before the phone failed, was the phone dropped etc., and hope for honest answers. Then it depends on how much you are prepared to gamble, money wise, hoping that the LCD is at least OK, so that you can swap it over.

As you can see from the schematic (scroll down a bit) in the link below the example shows the LCD having 16 input leads. There is no standard as to what function goes onto what input as the LCD manufacturer would make to order from the device manufacturer to suit whatever particular requirements.

The best that I can suggest is that you offer it for sale (or for free) as faulty -good for parts, LCD works on places such as Ebay, Gumtree, etc. to minimize the amount going to landfill. You might be surprised at the response as usually the major problem with devices is a broken screen which is hard to source, especially on the lesser known brands. So if it is re -usable by someone else you have minimized, as best you can, the amount going to landfill (the other phone is repaired instead of replaced, again with less landfill and your phone has less parts being sent to landfill by the new owner - basically one completely faulty phone being sent instead of two partially faulty), and also perhaps you have recouped a little cash towards the purchase of a new phone.