1602 LCD display with I2C module not working - i2c 1602 lcd

2024-09-13 14:21:38

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.

Customers appreciate the value for money of the monitor. They mention it's not bad for the price, has a nice display, and is a worthwhile investment.

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Response Time – The response time of an LCD display is measured in ms (milliseconds) and it refers to the grey-to-grey transition time. Ok, so what the heck does that mean in a real world setting? Well, have you ever heard of LCD “ghosting”? Ghosting basically refers to an artifact where you essentially would see a lagging “ghost” behind objects that move across the screen. This was caused by the response time being very slow. Hence, if an object was moving across the screen, the trailing pixels behind the object wouldn’t shift color quick enough, thus creating a little ghost or shadow-trail behind the object as shown in the image below from TFT Central below :

From color grading video, to editing still photographs, to creating digital art; being able to see colors accurately is probably the single most important feature for creative professionals.

Is IPS screenA touchscreen

"...Equipped with USB-C, DisplayPort, and HDMI options, it’s easy to hook up to a range of devices, and the USB-C port even allows for power delivery—..." Read more

However, high quality TN displays shouldn’t be ruled out completely. When calibrated, high quality TN displays can be used by creative professionals when cost is major factor. As we mentioned, within the studio, each of our ASUS G75 machines is hooked up to a Dell U24 or U27 wide gamut IPS display. However, when out on location, a calibrated Asus G75 display will still work very well.

Once again, IPS monitors will also show color and brightness shifts from edge to edge depending on the quality of the display, it will simply be less than a standard TN display. Here is the same illustration, this time showing our Apple MacBook Pro 15″ Retina display at a standard viewing distance. Notice that while the color shifting is more subtle, we still see a significant amount of shifting in brightness from edge to edge. However, there is indeed less shifting than the ASUS display.

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TN refers to Twisted Nematic and from here on, we will refer to a TN TFT LCD simply as a TN display. TN displays are the most common consumer LCD display simply because they in essence offer “the most bang for the buck.”

"...The joystick also makes the hdmi input switch very easy, fireTV to Nvidia Quadro, very smooth joystick operation. But better to get a 4K HDMI switch." Read more

There are many types of TFT LCDs. But, rather than turn this into an encyclopedia of TFT LCD types, let just discuss the two most common types. When most of us think of a standard non-IPS LCD, we are actually talking about TN TFT LCD. Let’s talk about these types of displays first.

Early LCD displays were absolutely terrible in regards to black levels. Liquid crystals wouldn’t absorb enough light and thus blacks would simply become a very visible gray. With poor black levels, once again you have reduced contrast. If you have followed our post production tutorials, we always mention that contrast is created by having some deep blacks and some pure highlights in each image.

You can also imagine, having poor black levels on your monitor will also make it difficult to visualize true blacks when editing your images. Your images most likely will end up with too much deep blacks since you would be compensating visually for the lack thereof in the display.

"...The build, especially for the all-important joystick, is solid: after two years of heavy use, everything still works like new...." Read more

As of late “IPS” has become a big marketing word. Step into an Apple store and you would be hard pressed talking to someone that didn’t mention Apple’s “brand new IPS Displays!” In fact, Apple is probably one of the biggest marketers of this “new-found” technology. As a business person myself, this is when you have to tip your hat to Apple’s awesome marketing machine. Why? Well, because IPS is actually nothing new. In fact, this technology was originally invented in 1996 by Hitachi.

Without a monitor that can accurately display colors, there is no guarantee that your finished product will display correctly in its final format.

Many of you already know, the term LCD simply stands for Liquid Crystal Display. It simply refers to thin display types that use unlit liquid crystals to formulate the display. It is important that you remember standard liquid crystals are unlit, because this means that they require some form of back light in order to be visible. A point that will resurface later in this article.

"...The connection wasn't reliable and the screen would blackout. I got rid of both of them and decided I needed to move on.)..." Read more

If you are a creative professional or are interested in the digital arts, then most likely you have heard the term IPS in reference to computer and laptop monitors. In fact, having an IPS display seems to be all the rage these days. Throw a stone on the internet and you will find discussions regarding IPS displays all over the “interwebs”; and in the usual interweb fashion, many people with the strongest opinions are a little confused as to what IPS actually does.

Customers have mixed opinions about the brightness of the monitor. Some mention it has excellent brightness, vibrant colors, and a clear non-reflective display. Others say it's a bit bright, not very good with dark settings, and the brightness is a pain to change.

This was the time when everyone started hearing about TFT LCDs or “active matrix LCDs.” TFT simply stands for Thin Film Transistor and a TFT LCD is simply another variation of an LCD display. They were all the buzz when they were released because they boasted great color, contrast and response times in comparison to available passive matrix LCDs.

Well, that is exactly what I am talking about. When looking at your computer straight on, you will notice shifting in color and brightness from the center of your screen out to the edges. This isn’t a major issue when you are working on a smaller display on say a 13-17″ laptop because the angle from edge to edge isn’t very extreme. But, on anything larger, this can have a very big impact.

"...Starting with screen quality, brightness is great, contrast is beyond expectation, white, gray, and black uniformity are all top notch, with little..." Read more

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At a standard viewing distance, this first example shows the edge to edge color and brightness shifting on our uncalibrated Asus G75VW-DS73. This is a very high quality FHD LED display (which is the next best thing to Retina in my opinion), yet we can still see some brightness and color shifting from the center out to the edge of the display. This effect is even more noticeable in the vertical direction, and the overall color shifting effect itself will be far more exaggerated on lower quality displays.

However, the needs of creative professionals are quite different. Creative professionals rely on their displays to show accurate colors from edge to edge within their working space. Monitors without a wide viewing angle will show color shifting whenever you are not viewing that particular area straight on.

Anyway, it was back in 1996-1998 when I remember the term TFT and “Active Matrix” becoming major buzz words in marketing computer displays. At the time, I was actually working as a sales person and then a technician for the brick-and-mortar computer retail powerhouse Comp USA (now an online only company, boo hoo!).

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"...It is HUGE and so clear! It was very easy to set up, and the best part was that it came with two cords: a regular USB to USB cord and a USB-C to USB-..." Read more

Customers have mixed opinions about the build quality of the monitor. Some mention the stand feels solid, the monitor is reliable, and easy on the eyes. Others say the build quality is inferior, the plastic frame, cables, stand, everything looks cheap, and everything is really choppy.

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"...Starting with screen quality, brightness is great, contrast is beyond expectation, white, gray, and black uniformity are all top notch, with little..." Read more

Most TN panels can only represent 70% of the 24-bit color available from graphics cards as they only display 6-bits per RGB color (i.e. 6-bits Red + 6-bits Green + 6-bits Blue = 18-bits). So, instead they display interpolated 24-bit color using dithering. Think of dithering as smudging two colors on a palette t0 create a desired shade, only instead of paint it is combining surrounding pixels to create the desired shade. If you have a high-quality TN display, this generally isn’t going to be noticeable. However, poor quality TN displays may only show as little as 10%-30% of NTSC, Adobe RGB and sRGB color gamuts.

IPS is indeed a better display technology for creative professionals. If you are considering a long-term career as a creative professional, then a high quality wide gamut IPS LCD is an absolute must have. In fact, whenever we are working on production tutorials seen in the LR4 Workshop Collection and software such as the LR4 Preset System, we are always working on high quality IPS LCDs because we need a reference quality display in order to achieve accurate final results.

Contrast & Black Levels – First, take what you know about contrast ratios and throw it out the window. All of this 1000:1, 10,000:1, 1 million:1 contrast measurements are bogus. Why? Because factories are performing these measurements according to their own scales, not a uniform scaling system. Hence comparing contrast numbers across different brands is absolutely useless.

Customers have mixed opinions about the monitor's color accuracy. Some mention the colors are accurate and the resolution keeps things sharp, while others say the colors are off, the blacks are at best a dark gray, and the color accuracy is difficult to test.

In the image below, after calibration with our Spyder 4 Elite, the calibration report shows that our Dell U2711 27-inch Monitor displays 93% of SRGB and 87% of Adobe RGB. While it may not calibrate as well as an even higher-end NEC or EIZO display, it is a great wide gamut IPS monitor for a modest price.

Customers find the monitor easy to set up. They mention it's plug-and-play with the Mac, works straight out of the box, and has a simple connection. Some appreciate the easy-to-understand explanation as to why 1440 resolution works better. The joystick also makes the HDMI input switch very easy. At full resolution, working with multiple documents is painless.

Black levels on the other hand refers to how dark a pixel can actually become. We briefly mentioned earlier that liquid crystals are not self-illuminating, which is why you need a back or edge light to light up the pixels. Well, if you have a light shining through a pixel, it is easy to reveal brighter colors and whites. But, what about blacks? If the liquid crystal has a light directly behind it, then the only way to show black is for the liquid crystal to block all of the incoming light. In the example below, the image on the left has much better overall contrast and black levels when compared to the example on the right. This is an illustration of what black levels would look like on a poor quality LCD where the back-light shines through the black pixels.

"...A few mentioned that the color is off, they are too bright and saturated, almost neon. I did experience this...." Read more

"...Build quality is okay. It looks like the cheap plastic that it is, though I like the narrow bezel all the way around the front...." Read more

"...This is my 3rd LG monitor and all have had no issues with durability, hopefully I have the same kind of luck with this one." Read more

IPS displays were designed to improve on the flaws of TN technology, primarily in regards to the poor viewing angles and color reproduction. They do this by simply altering the direction of the pixels within the display (parallel instead of perpendicular pixels). Of course, it really isn’t that simple and neither is explaining it. So let’s just leave it at that 😉

TN displays have evolved to the point of having an incredibly fast response time, which is one area where an IPS display suffers. This means that a TN display would be better for entertainment, since it will not show as much ghosting when watching sports, or playing your favorite video game.

"...joystick, is solid: after two years of heavy use, everything still works like new.I have only two complaints: 1...." Read more

"...This monitor has nice saturation and overall color balance. I'm no colorist but the display just looks really, really good...." Read more

To illustrate this, in the above image we took a single RAW image and processed it on one of our calibrated displays. We then took this image and displayed it on our uncalibrated 17″ ASUS G75VW-DS73 and on our uncalibrated 15″ MacBook Pro Retina. Both screens were then shot with a Canon 5D Mark III in a completely dark room at the exact same settings to show the difference in color. The uncalibrated MacBook Pro Retina comes far closer to being color correct straight out of the box than the ASUS display. This isn’t to say the ASUS display is unusable, far from it. This simply means that prior to using the ASUS for editing, it does need to be calibrated with an external calibration device such as the Spyder 4 Elite Elite (which is what we use in the studio).

Customers like the picture quality, monitor quality, and value for money of the product. They mention that the display is gorgeous, has good color rendering, and the contrast is beyond expectations. Some are satisfied with the ease of setup. However, some customers disagree on functionality, build quality, brightness, and color accuracy.

These features make IPS displays far better when it comes to professional creative applications than casual consumer entertainment uses.

Again, on a smaller 13″, 15″ or 17″ laptop display, this isn’t as big of a problem. On our laptops, we are generally working within the center of the screen and since the screens are small to begin with, the shifting will not be as noticeable. However, could you now imagine sitting close to say a 24″ or 27″ display? Without a high quality IPS display, the color shifting will be so significant that it will be difficult to correctly color your creative works.

To illustrate this point, we took the same RAW image and duplicated twice to create a total of 3 duplicate images. Within Lightroom 4, we are using the Survey View to view all images side by side. At a standard viewing distance, I shot an image in a dark room with our Canon 5D Mark III and a 17-40mm lens.

"...3. The blacks on the monitor are pretty gray - the contast on the monitor is decent but isn't super impressive...." Read more

"...Colors stand out, super res is great. response time is good and the 4k is obviously the main selling point...." Read more

In regards to viewing angles, TN displays suffer (particularly in the vertical direction which is what you saw in the illustration above). In fact, if you have ever tried to watch a movie on your laptop while laying down, you may have even noticed the colors inverting at extreme angles.

Finally! If you have made it to this point in the article, then pat yourself on the back because you probably know more about LCD displays than most, haha.

But, to keep things simple, let’s just say that IPS is IPS is IPS. In other words, let’s just talk about the technology (and similar technologies) as a whole.

That’s right folks, this latest marketing buzz word is in regards to a technology that as of today (Dec 13, 2012) has been available for nearly 16 years. And once again, I tip my hat to you Apple. Because now everyone has “gotta have” an IPS display. But, what exactly is an IPS display? We will get there in due time, but for now, let’s go over some of the basics.

"...So what appears to be a great product at a good price, and an experience soured by less than adequate service!" Read more

Indeed, when it comes to creative professionals using TN panels for their work, choosing a high quality TN panel is extremely important. Overall quality, viewing angle, contrast, and color representation will differ significantly between make and model. For example, the ASUS G75 units that we use for image editing feature an FHD LED back-lit TN TFT LCD; which from all the laptops I have tried, are the next best thing to the MacBook Pro Retina display. When in the studio, we still use Dell Ultrasharp IPS screens attached to each G75 workstation. But, when we are out-and-about on location without IPS displays, a calibrated G75 display will still work just fine for image editing and color grading.

Poor overall contrast results in flat looking displays given that the difference between color and light contrast from pixel to pixel is very low. To use a photography term, a high contrast display will look like it “pops.”

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As we previously mentioned, IPS technology has been around for quite a while. It may also surprise you to know that there are several different types of IPS technologies. IPS, S-IPS, AS-IPS, IPS-Pro, H-IPS, etc. All of these are different types of IPS technologies created and used by different manufacturers and display lines. It is beyond the scope of this article to discuss each of these, but just know that all IPS technology is not equal, and it is definitely worth digging into what type of IPS technology a display has before purchasing.

For example, typical uncalibrated consumer LCDs tend to be more blue/red than a calibrated or professional color correct LCD. Thus, when editing your image, you would tend to overcompensate creating an image to look warm on screen. However, once you printed said image, you would find that it comes out far too warm since your screen wasn’t correctly displaying the colors to begin with. Hence a monitor that doesn’t accurately display colors will force you to incorrectly overcompensate.

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Wide Color Gamut – The monitor’s color gamut refers to color reproduction, or basically how well colors can be accurately displayed in any given situation. This is feature that is absolutely crucial when it comes to creative professionals. The wider the color gamut, the better the display can reproduce extended colors found in the Adobe RGB and NTSC color gamuts.

Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.

"...Unit starts in VIVID mode. An over saturated, over brightened mode. Guess it would useful if your office desk was on your back porch in full sun!...." Read more

Response Time is an important feature when it comes to entertainment. Whether you are enjoying a movie, watching your favorite sports team, or playing the latest video game, a slow response time will ruin your experience as it can be very distracting.

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LCD technology in general suffers from reduced contrast and poor black levels when compared to other types of technology, such as plasma and CRT displays. They have come a long way, but they still have a ways to go.

Customers are satisfied with the picture quality of the monitor. They mention it's gorgeous, has good color rendering, and perfect picture. They also appreciate the brightness, contrast, and screen image clarity. Overall, customers say it's amazing and matches perfectly with an Apple environment.

Customers like the monitor's quality. They mention it's an excellent option as a second monitor to a MacBook 16-inch, and a great 27-inch monitor for their setups. They appreciate the small bezels and bright screen. Overall, customers say it's an ideal monitor for working from home and coding.

In this article, we are going to help demystify the term IPS (In-Plane Switching); but more importantly, we want to help everyone better understand display technologies from a real-world-practical standpoint. Let me preface this by saying that if you are looking for a technical/scientific article on display technologies, then this isn’t the place for you. Like every article on SLR Lounge, our goal is write approachable articles designed to help our readers in understanding real-world functionality. Let’s get started!

Remember that when it comes to each type of display technology, quality will vary. A high quality TN display can perform better than a low quality IPS display. Within IPS displays, there are several different types of IPS technologies.

Viewing Angle – First, keep in mind that it isn’t always beneficial to have a wide viewing angle on your LCD. In fact, when we worked in the finance industry, we would always use screen privacy protectors whenever we were on our laptops working on the road. These privacy protectors essentially cut down the viewing angle by an extreme amount so that only those looking directly at the screen could see the display. If you are handling sensitive information on your laptop, the last thing you want is an IPS display that will let anyone see your screen from any angle possible.

As with any display technology, they improve over time. IPS displays now have great contrast and black levels (a problem they previously suffered from). However, their response times still don’t compare to standard TN displays. In fact, the previous example of ghosting was actually on an IPS display. While response times have improved over time, the IPS displays still lag in this feature.

"...Super happy that it was plug and play with the Mac, and operates correctly with the Mac. It's a keeper for me...." Read more

To aid you on your IPS display research, here is one last tid-bit of interesting info. Factories that manufacturer these TFT display panels are extremely expensive. In fact, they are so expensive that this high barrier to entry means that there are only a handful of manufacturers out there. In my opinion, Panasonic (who purchased IPS technology from Hitachi), Hitachi, Samsung, Toshiba, Sony and Sharp are the best manufacturers of IPS technology.

Since our latest posts discussing our favorite laptops for creative professionals and the Lightroom 4 benchmark tests, we have seen a lot of comments and questions regarding displays. The particular keyword in these discussions being “IPS.”

Let’s now skip ahead to the present. Most every type of monitor that is purchased today is going to be a type of TFT LCD display. That’s right, your lovely new IPS display is actually just a type of TFT LCD. It is simply a different technology variant of thin film transistor liquid crystal displays. In fact, there are two primary variations of TFT LCDs which we are going to discuss shortly. First, let’s discuss some of the most important features when it comes to displays.

While an LCD with poor black levels is tolerable for general computer work, it is absolutely terrible when it comes to watching movies. You all know the black bars at the top and bottom of widescreen movies when played on a TV with a different aspect ratio? Well, on a LCD display with poor black levels, those black bars become a very visible gray (which I am sure is something many of you might have noticed).

Now that we have covered the most important features of a display, let’s move on to discussing the two most common types of TFT LCDs and their strengths and weaknesses in regards to these features above.

So, that lovely little Dell, Asus, HP or other brand of TN/IPS LCD that you are looking at isn’t actually coming from said companies. They are simply purchasing the TFT LCD panels OEM from these large manufacturers and using them in their displays. Looking into who actually makes the panel for your so-desired TN or IPS LCD will help in comparing each display’s individual quality.

With all the display acronyms for technology that have come out over the past 10-20 years, it is no wonder why people are confused. Well, let me see if I can help “de-confuse” the situation. First, let’s start with the basics, the LCD.