lvds interface lcd panel free sample

LVDS displays can vary a lot. LVDS displays are not governed by a set of well defined rules like MIPI DSI displays are. Therefore, it is up to the LCD manufacturer and the LVDS display driver IC manufacturer to use LVDS interface as they please, as long as they follow the physical interface and logic levels.

Based on this data, we can pick an LVDS transmitter IC. SN75LVDS84 from Texas Instruments is great for use with LCD displays that can be driven by an STM32.

Then to enter "Free-Running" mode, the uC in a similar manner issues a "Read Burst" command, holding DQM active until the uC has a chance to release the Data/Command/Address pins. At which point, the uC is completely out of the picture, and the data previously stored in the SDRAM is output right back to its Command/Address inputs. At the end of the first page is a command to read the next page. (Note that even after wiring all the Address/Command pins to DQ pins, there are *several* DQ pins remaining, which can then be used for other purposes, like driving an LCD, etc).

As implemented for the LCD, the last page issues a "Read" command back to Page 0. Thus, the same pages are output continuously and repeatedly (refreshing the LCD image). The simple act of Activating a page in memory causes that memory page to be refreshed. And, again, SDRAM refresh isn"t necessary nearly as often as specified (once every 10 seconds seems to be plenty). Thus, no explicit "refresh" commands are necessary in this case, since each page is cycled through repeatedly.

So, what can be done with these complex jump-patterns... well, imagine it a bit like a flow-chart... Possibly a state-machine. In the case of the LVDS-LCD, rather than writing the same data repeatedly in a linear fashion, we could have several states. The serial data-patterns sent during a Horizontal Front Porch, for instance, are identical, but they must be repeated a dozen or more times in each row, and repeated for every row. Instead of loading a dozen *768 identical patterns in the SDRAM, why not have it loaded once and have it cycle? It takes a bit more real-time control from the microcontroller, but could be useful to jump between states like this. And some of these jumps don"t require uC control at all, such as jumping from the end of each drawn-row to the Horizontal Front Porch. In other words, 768 separate locations all end up jumping to the same location.

The circuitry has changed slightly, and I"m straying a bit from my desire to avoid glue-logic... In sdramThing2.0, data and Free-Running commands were all stored in the same "group" of chips. Now, data has been moved to the Side-Kick. Since I"m still working with the LCD display (for testing-purposes), this isn"t quite so cut-and-dried. The timing information (Pixel-Clock and DE/Vsync/Hsync, which is combined with the Blue values) is still loaded into the Free-Runner, such that it won"t change when sampling. The other two pins ("Red" and "Green") are connected to the Side-Kick for Sample/Repeat.

Flat Panel Display Link, more commonly referred to as FPD-Link, is the original high-speed digital video interface created in 1996 by National Semiconductor (now within Texas Instruments). It is a free and open standard for connecting the output from a graphics processing unit in a laptop, tablet computer, flat panel display, or LCD television to the display panel"s timing controller. Most laptops, tablet computers, flat-panel monitors, and TVs use the interface internally.

FPD-Link was the first large-scale application of the low-voltage differential signaling (LVDS) standard. National Semiconductor immediately provided interoperability specifications for the FPD-Link technology in order to promote it as a free and open standard, and thus other IC suppliers were able to copy it. FlatLink by TI was the first interoperable version of FPD-Link.

By the end of the twentieth century, the major notebook computer manufacturers created the Standard Panels Working Group (SPWG) and made FPD-Link / FlatLink the standard for transferring graphics and video through the notebook"s hinge.

Another display interface based on FPD-Link is OpenLDI. It enables longer cable lengths because of a built-in DC balance coding to reduce the effects of intersymbol interference. In the OpenLDI version of DC balance coding, one of the seven serialized bits indicates whether the coding scheme needs to invert the other six bits transmitted in the clock period to maintain DC balance. Therefore, each LVDS pair other than the clock pair effectively transmits six bits per clock cycle. However, OpenLDI lost the video-transfer standards competition to Digital Visual Interface (DVI) in the early twenty-first century, and the result was stand-alone LCD panels using DVI to receive video from a desktop computer.

FPD-Link II was introduced in 2006 and is an improved version of FPD-Link. National Semiconductor designed it specifically for automotive infotainment and camera interface applications. FPD-Link II embeds the clock in the data signal and therefore uses only one differential pair to transmit both the clock and video data. This further reduces the size, weight, and cost of cables for infotainment and safety camera applications. For example, the 24-bit color application now uses only one twisted pair instead of the 5 twisted pairs used by FPD-Link.

The Digital Content Protection LLC approved FPD-Link III in 2009 as a high-bandwidth interface for carrying content whose owner wants HDCP security. This approval enables the FPD-Link III chipsets to include the highly confidential HDCP keys and state machines to encrypt the content. The embedded control channel in the FPD-Link III chipsets simplifies the key exchange protocols between the source and destinations that verify the destination is secure.

If using a High Brightness Display, you can choose the AD Board which have light sensor function that can adjust panel"s brightness automatically.PCAP touch supports 10-finger multi-touch capability, light gloves and stylus touch (need to adjust the firmware),

If using a High Brightness Display, you can choose the AD Board which have light sensor function that can adjust panel"s brightness automatically.PCAP touch supports 10-finger multi-touch capability, light gloves and stylus touch (need to adjust the firmware),