tft display glitch made in china

If anyone has one of these displays that you thought was broken, here is a working sketch based on an 8051 driver example I received from the Chinese vendor. Perhaps it will help get someone started... I took the function initial() from this sketch and added it to Bodmers ST7735_init.h for my "BLUETAB" version which is the subject of this topic.

You don"t dismantle anything. Just look at the pcb side of your display. There will be some visible chips and some printed information e.g. model number.

As screen showing text is in black and white mode, it may display well even the interfaces are miss-matched. But not for color, it is highly possible causing by the LVDS interface type matching problem. Please recheck the host interface type and TFT interface type in their specifications.

Since different type of LVDS signal packing the RGB data in different ways, showing a gray level bar on the display will help you see the issue easily. (Please refer to Appendix for possible result)

Yes, it can work. You just need to leave the IN3+ and IN3- opened and connect the others. (Please, refer to their specification for details) As the 18bit-LVDS signal cannot tell the TFT display to show a “full white(FFFFFF)”, the highest white level will be ”FCFCFC”.

Check the backlight power supply. There may be a “low-level” PWMgiven to the TFT display module which dims the backlight brightness . Or the PWM active level is reversed. Also, it could be wrongly feeding a 18bit LVDS data to a 24bit-LVDS(VESA) TFT display module . (see Appendix) Some of Topway"s TFT display modules have interface selection setting. It might be wrongly wired. (Pls, refer to their specification for details)

RE:Country of origin; Thin Film Transistor (TFT); Liquid Crystal Display (LCD); TFT/LCD module; PCB; flat panel display computer monitor; marking; outermost container; ultimate purchaser; substantial transformation; Hitachi; Japan; China; HRL 560427; 19 CFR 134.1(a); 134.32(d).

This is in reply to your letter, dated April 8, 2002. In that letter, you requested a ruling on the country of origin marking requirements for TFT- LCD modules assembled in China of Japanese components and imported into the United States to be used to make notebook computer monitors and flat panel desktop computer monitors. Our response follows.

Hitachi will produce finished thin film transistor (TFT)/liquid crystal display (LCD) modules that will be imported into the United States. The two products at issue are: 1) TFT/LCD modules for use with notebook computers; and 2) a Super IPS (In Plane Switching) TFT-LCD module to make flat panel desktop computer monitors.

You state that although the Japanese-origin TFT-LCD Cell is the primary component, the Japanese components are substantially transformed in China when they are assembled into a TFT-LCD module in China. You contend that the components, which include the PCB, Back Light Unit (with CFL), tape, frame, cables, and the TFT-LCD Cell, when assembled result in a different commercial article, that is, a completed TFT-LCD module ready for use to manufacture notebook computer monitors or flat panel desktop computer monitors.

A representative of your company stated by telephone on April 24, 2002, that after importation of the finished TFT-LCD modules into the U.S., your company stores them in a warehouse as part of your company’s inventory. When a customer orders the modules, they are shipped to the customer. Your representative stated that because the imported articles are highly sensitive and fragile, your company does not normally repackage the imported articles. Your company’s customers then incorporate the TFT-LCD modules into a monitor when manufacturing their final computer product. In other words, the modules are not ready to be used as monitors when imported into the U.S. because they lack components such as the frame, power supply, driver, et cetera and must be further processed in the United States.

What are the country of origin marking requirements for finished TFT-LCD modules assembled in China from Japanese components and imported into the United States to be used for manufacturing notebook computer monitors and flat panel desktop computer monitors?

Based on the facts provided, it is our opinion that the assembly of various components used in producing the TFT/LCD module in China, including the Back Light Unit which is made in China from approximately 12 components, effects a substantial transformation of the individual components. The individual components, most of which are made in Japan, lose their identity and become integral part of the new article – TFT/LCD module. The assembly operations are also not minimal or simple. Thus, the TFT/LCD module as imported into the United States qualifies as a product of China and therefore should be marked as such.

In HRL 560427, the LCD module was made in Japan and imported into the U.S. The LCD module was then combined with nine other U.S. components to manufacture the final Flat Panel TFT/LCD monitor for personal computers. Customs ruled that the Japanese-origin LCD module was substantially transformed in the U.S. when incorporated into the monitor in the U.S. Similarly, in the instant case, the TFT/LCD module made in China will be incorporated in the United States into flat panel desktop computer monitors and notebook computer monitors manufactured by your customers.

In the instant case, unlike the case in 560247, the importer is not the manufacturer or the processor. However, subject to the terms of 19 C.F.R. § 134.35(a) and 19 C.F.R. § 134.1(d)(1), your company’s customers, who use the imported TFT/LCD modules to produce the flat panel desktop computer monitors and notebook computer monitors in the United States would be considered the ultimate purchasers. Therefore, as in HRL 560247, the imported article in the instant case qualifies for the marking exception provided in 19 C.F.R. § 134.35(a) and 19 C.F.R. § 134.32(d). Consequently, the country of origin marking requirements may be met in the instant case by having the imported articles’ containers (i.e. boxes or other containers that hold the modules) marked with the country of origin, assuming that those containers also reach your customers.

For the foregoing reasons and based on the facts provided, the TFT/LCD modules are products of China and therefore should be so marked. However, because the TFT/LCD modules will be used by your customers to manufacture flat panel desktop computer monitors and notebook computer monitors in the United States, your customers are the ultimate purchasers. Therefore, the marking requirements may be met by marking the containers of the imported articles with their country of origin, assuming that your customers receive the articles in those containers.

one is a hardware fault, the other is a software problem. Although only these two big aspects but involved in the details of the aspect is very much, the following details about the display color abnormal possible reasons and solutions.

Monitor color is not normal, we recommend the first use of the elimination method, as far as possible to eliminate some simple problems. There are many reasons leading to the abnormal display of the display color, such as checking whether the display data line is normal, the display color control panelis not set well, poor contact, or rust of the display wire may lead to such problems.

If all of the above methods are ineffective and the display is well over five years old, we can consider the color deviation of the display caused by the aging of the electron gun to be abnormal.

Usually use more than 2 years of the color display will appear this kind of fault, the real cause of the fault is mostly caused by the picture tube seat moisture oxidation, as long as the replacement of the original new tube seat can be troubleshoot. But some say it would be gilding the gilt by using a small piece of sandpaper to polish the protruding end of the tube to remove the oxide. In the picture tube that the author has replaced the tube seat, some of them do have some oxides on the tube foot, but these oxides are missing from the original tube seat to the tube foot, which can be removed with a brush. Up to now, the author did not see the tube was oxidized, but due to excessive force and make the tube leakage and damage the picture tube is encountered a few cases, so we do not use sandpaper to burnish, so as not to appear “death” damage!

If the replacement of the tube seat is not effective will replace the FBT, but in this work, the author suggests you had better find professional personnel! In addition, some types of visual amplifier parts of the circuit are more special, sometimes after the fault will also cause the image blur. But at this time usually the brightness and line, field amplitude are also abnormal, for this kind of fault point the author recommends that you deliver professional personnel to deal with! If the color display is not a brand-name product and the use of a very long time, then the author suggests that you find a professional electrical maintenance department to replace the work of the tube seat, so as to avoid the occurrence of pipe neck leakage and other accidents after the responsibility!

1) the image is clear at the beginning of starting up, but the color of the display is abnormal as the use time is prolonged and the display becomes increasingly blurred;

A lot of people think this is the mains voltage of the mains electricity is the insufficient or unstable cause, some “master” can say even because of the lamps and lanterns that contains electronic ballast or electromechanical kind electric appliance brings color to show the interference of power source, somebody says the hardware fault that the video card produced is caused by. In fact, these views are wrong, because the display voltage requirements are not very strict – most of the current color display can be in the 100V ~ 240V power supply voltage under normal operation. As for other electrical appliances that will cause interference is even more impossible, after all, color display use is not mutual inductance stabilized voltage power supply, and other electrical appliances even if the interference will not be screen flicker!

Compatibility failure will usually cause the computer can not to start up and alarm sound, the system is not stable crash or screen abnormal miscellaneous phenomenon. Display card compatibility fault generally occurs in the computer just installed or upgrade, more in the motherboard and display card is not compatible or motherboard slot and display card gold finger can not completely contact. The video card compatibility fault usually USES the replacement method to detect, generally USES the replacement video card to troubleshoot the fault.

CMOS setup failure is caused by the error of displaying related options in CMOS. Common CMOS setup failures mainly include: integrated graphics card motherboard, CMOS graphics card shielding options setting error; For example, the “AGP Driving Control” option is incorrectly set (usually “AUTO”), “AGP Aperture Size” option is incorrectly set, and “FAST Write Supported” option is incorrectly set.CMOS error is generally modified by loading the default BIOS value.

If the fault is serious, the maintenance requires that you must have certain hands-on ability and professional knowledge, so the author suggests that if you still have not been repaired after eliminating the simple cause of the fault, please deliver it to the electrical maintenance department for treatment. Sometimes some magnetic objects (such as some low power box or ADSL cat power supply, etc.) placed near the display will cause a certain Angle flicker on the screen, so when this phenomenon to try to clear the display around the objects to see, usually the problem can be solved.

STONE provides a full range of 3.5 inches to 15.1 inches of small and medium-size standard quasi TFT LCD module, LCD display, TFT display module, display industry, industrial LCD screen, under the sunlight visually highlight TFT LCD display, industrial custom TFT screen, TFT LCD screen-wide temperature, industrial TFT LCD screen, touch screen industry. The TFT LCD module is very suitable for industrial control equipment, medical instruments, POS system, electronic consumer products, vehicles, and other products.

In this article, we are looking at the benefits of looking for Chinese TFT LCD manufacturers. Instead of resorting to other manufacturing means, opting for the Chinese is a much wiser and lucrative choice. If you are looking for Chinese LCD manufacturers, you should start with STONE Tech.

Handbags, wallets, phone cases, and other similar items have become the favorites of wholesalers and bulk buyers. These products are directly sold to end consumers. However, the fascinating thing about the Chinese production and manufacturing business is that it does not only cover the end-consumer products. Rather, you can also acquire raw and basic materials needed for the further manufacturing of goods and products. One such product is LCD displays.

LCD displays have become something of a necessity in today’s world of tech advancement. Many things in our daily life have been automated, and are operated using an interactive user interface. For these kinds of machines and gadgets, LCD displays are typically necessary.

STONE Tech is an LCD manufacturer located in Beijing, China. It was founded back in 2010, and it has been developing TFT LCD display modules ever since. These modules can be used for a variety of different machines including electric equipment, precision instruments, and civil electronics etcetera.

One of the main benefits that you get with Stoneitech.com is that there is a wide range of diverse products that you can purchase. For example, there are three different application types that you can choose from which include the Industrial Type, Advanced Type, and Civil Type. Similarly, there is a range of different sizes that you can choose from. There are 11 different sizes that you can buy, ranging from the smallest 3.5-inch display to the large 15.1-inch one. The same goes for the Android series which where you can choose between 4.5-inch and 31.5-inch displays.

The same applies to LCD displays. When you save up on costs when buying LCD displays, you can set a lower price for the whole machine or gadget that you are producing.

In case you need some convincing about buying from the Chinese, we have compiled a list of benefits that you can enjoy when looking for TFT LCD manufacturers in China.

the baseissueis when i render some thing in TFT lcd anddon"t change it for a while( minutes or hours ) and then change it to dark, alight shadowof last image can be seen on the place. it was very surprising to me because as I know this issue was for oldCRTdisplays and not for LCDs and I"d never seen any same problem with my other TFT based LCD projects. so is it true pixels of a LCD couldbecome spoiledbecause of no changing awhile, or there is other problem that I cant see!!.

In this Arduino touch screen tutorial we will learn how to use TFT LCD Touch Screen with Arduino. You can watch the following video or read the written tutorial below.

As an example I am using a 3.2” TFT Touch Screen in a combination with a TFT LCD Arduino Mega Shield. We need a shield because the TFT Touch screen works at 3.3V and the Arduino Mega outputs are 5 V. For the first example I have the HC-SR04 ultrasonic sensor, then for the second example an RGB LED with three resistors and a push button for the game example. Also I had to make a custom made pin header like this, by soldering pin headers and bend on of them so I could insert them in between the Arduino Board and the TFT Shield.

Here’s the circuit schematic. We will use the GND pin, the digital pins from 8 to 13, as well as the pin number 14. As the 5V pins are already used by the TFT Screen I will use the pin number 13 as VCC, by setting it right away high in the setup section of code.

I will use the UTFT and URTouch libraries made by Henning Karlsen. Here I would like to say thanks to him for the incredible work he has done. The libraries enable really easy use of the TFT Screens, and they work with many different TFT screens sizes, shields and controllers. You can download these libraries from his website, RinkyDinkElectronics.com and also find a lot of demo examples and detailed documentation of how to use them.

After we include the libraries we need to create UTFT and URTouch objects. The parameters of these objects depends on the model of the TFT Screen and Shield and these details can be also found in the documentation of the libraries.

So now I will explain how we can make the home screen of the program. With the setBackColor() function we need to set the background color of the text, black one in our case. Then we need to set the color to white, set the big font and using the print() function, we will print the string “Arduino TFT Tutorial” at the center of the screen and 10 pixels  down the Y – Axis of the screen. Next we will set the color to red and draw the red line below the text. After that we need to set the color back to white, and print the two other strings, “by HowToMechatronics.com” using the small font and “Select Example” using the big font.

The picture is not displayed full screen and also there is some lines at the time of bootup. Please find the source code, pictures and datasheets for your reference.

It"s called "Remanence effect". Basically the games sections which stay static were displayed at the same place for too long and got "stuck" on that place in your screen. This is a common issue with liquid crystal displays. That"s why on TVs like Samsung, the on screen display (OSD) keeps moving and does not stay static. It only happens if the image stays for very long.