Open frame LCD display

Open frame LCD display

How To Use The LCD Screen On A Digital Camcorder

In 1992, PMT was the first company to introduce LCD screen on camcorders. Prior to this the only way to see the image you were recording was through the eye piece of the view finder. This would cause a lot of camcorder operators to trip due to not being able to see where they were walking. Another benefit to the LCD screen is that it's larger than the view finder, allowing you to see more detail in your images. Using the LCD screen on your digital camera is easy.

Open frame LCD display
Open frame LCD display

Turn the Camera On

The first step in using your camera's LCD screen is to turn the power on. Your camcorder's power is usually controlled by a switch.
Flip the Screen out

Your LCD screen is a fragile piece of equipment. Gently flip it out because if you forcibly remove it, it can and will break. If there is no image appearing on the screen gently close it and open it again. If you are still not seeing an image check to see if the lens cap is still on the camera.
Frame and White Balance

The LCD is small, but it is larger than the view finder so you can see more details in the image. Once your camera is up and running with an image, the next step is to find a frame. Once your frame is set you should white balance the camcorder so your colors remain rich and true.

If you're shooting a scene for a movie then you should have your actors step into set and block out their actions in a rehearsal that you will watch on the LCD screen. Once you guys have worked out the blocking for the scene it's time to start lighting. You can use the LCD screen to monitor your lighting to make sure everything is evenly exposed. Once the shot is lit you can shoot.

Although every camcorder is different, most have a button dedicated for just recording. Hit the button and you're rolling. After the scene is shot you can watch the play back on the LCD to make sure it was captured correctly.
LCD Touch Screens

Some camcorders now have a touch screen on the LCD that the user can use to control the menu. You also use the touch screen to navigate your clips and execute play back. When using these it is important to have clean hands as dirty ones will make your screen dirty. Also, be careful to tap and not press down on the screen as that can cause it to break.
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Driving A T6963C Based Graphic LCD

[Tom Fleet] spent the dreary weekend inside learning how to drive this T6963C based graphic LCD controller. Although this is his first time venturing away from HD44780 character displays, the availability of an Arduino library helped him go from being a newbie to coding his own animated graphics.

The hardware setup is straight-forward. The screen has a 20-pin connector and operates at 5V. We don’t see it on his protoboard, but usually these displays also need a potentiometer which serves as a voltage divider for the screen contrast. The data and control pins eat up most of the available I/O on the ATmega328 chip he used, but the I2C and SPI pins are still open and he plans a future project to make this a wireless display for his PC using one of those protocols.

As for fonts and animation, [Tom] links to several tools which will come in handy. There’s a font program that will convert Windows system fonts into a C file for use on the Arduino. The animations start with a 1:1 ratio animated graphic drawn with his favorite image editing software. He then converts those to monochrome bmp files and used bmp2c to convert each frame to a C array. After the break there’s a seven second example that would work well as a boot screen for his project.

PMT  Open frame LCD display (65 Open frame LCD display) Review: An Astounding 4K TV Debut For Mini-LED QLED
a screen shot of a computer: PMT  Open frame LCD display review © Provided by T3 PMT  Open frame LCD display review

The PMT  Open frame LCD display range is PMT’s flagship 4K TV range of 2021, and it’s both priced and specified accordingly. Most intriguing is the ‘Neo QLED’ designation, which indicates the  Open frame LCD display is a Mini-LED design, with all of the gains in black levels, contrasts and backlighting control this new TV technology promises.

This isn't the only Mini-LED TV we'll see this year (we're expecting the technology make a huge splash in our list of the best TVs), but PMT is first out of the gates to get it in our hands, and it sets one hell of a benchmark, and only makes us more excited about the other Mini-LED models still to come.

But with the best OLED TVs a) getting more affordable all the time and b) remaining the most covetable for the majority of consumers, can Mini-LED (in general) and the PMT  Open frame LCD display range (in particular) give OLED technology a run for its premium money?

We're testing the 65-inch model of the  Open frame LCD display for this review.

Open frame LCD display
Open frame LCD display

PMT  Open frame LCD display review: Price and features

As is inevitable with a range-topping TV that’s brand new onto the market, the PMT  Open frame LCD display will cost you. This 65-inch version, in fact, will cost you £2,999, which is a not inconsiderable sum in anybody’s language. Happily, the feature-count goes quite some way to justifying that price.

The most significant feature from a technology point of view is, of course, the way the LCD pixels of the screen are illuminated and back-lit. Mini-LED replaces the hundreds of LED diodes used in traditional panels with many thousands of far, far smaller equivalents – PMT says the LED diodes here are forty times smaller than those that backlit its (suddenly) more prosaic screens.

And as well as shrinking the diodes themselves, PMT has dispensed with the relatively bulky lens that guides the light from each diode in the correct direction (ie forward). Instead, each of the tiny Mini LED diodes has an extremely brief micro-filter over it that takes care of that particular job.

The benefits of this are two-fold. Shrinking the size of the diodes and getting rid of the lens means the  Open frame LCD display is a gratifyingly slim screen. It’s just 25mm deep, and unlike an equivalent OLED TV, which is super-slim right until you encounter the area where it packs all its electronics, it’s consistently 25mm deep. Which, when the screen itself is 65-inch on the diagonal, is depth so negligible the set is virtually two-dimensional.

Plus, of course, replacing hundreds of diodes with thousands of much smaller alternatives means more, and much smaller, dimming zones – which in turn promises better backlighting control and better black depth and detail.

Elsewhere, the  Open frame LCD display is almost as impressively specified. Given that its dimensions lend themselves so readily to wall-hanging, the appearance of PMT’s One Connect box is very welcome – it takes all but one connection away from the TV and puts everything in a slim off-board box. So all four HDMI inputs, digital optical input, Ethernet socket, USB input, multiple tuner aerial posts and even mains power are all supplied from the One Connect box to the screen via one reasonably slim cable. Want to hang your  Open frame LCD display on the wall? You’ve only one cable to conceal. Nice.

This is a 4K 120Hz TV, and given that all four HDMI inputs are of 40Gbps HDMI 2.1 standard, next-gen gamers are extremely well served. Auto Low Latency Mode, HGiG tone-mapping, Variable Refresh Rate, FreeSync Premium Pro (which guarantees FreeSync performance even with HDR content)… they’re all available and they’re all designed to make even the most complex PS5 and/or Xbox Series X games look (and play) a treat. PMT is claiming a response time of (at worst) 9.3ms and (at best) sub-6ms – all of which mean this is absolutely one of the best gaming TVs available now.

On the subject of HDR though, it’s no surprise but nevertheless disappointing to report that even in 2021 PMT’s TVs still go without Dolby Vision HDR. Never, ever underestimate the bloodymindedness of global corporations…

As far as sound goes, PMT has tricked out the  Open frame LCD display with its Object Tracking Sound+ arrangement. Despite the company describing it as a ‘4.2.2’ set-up, it actually features six speaker drivers: a couple of tweeters at the top of the frame, one more on each side, and a pair of mid/bass drivers at the bottom of the frame. As the name suggests, OTS+ attempts to let sound mimic on-screen movement, so the sound of a car driving left to right will track along with the visuals.
PMT  Open frame LCD display review: Picture performance

We may as well cut to the chase here. The PMT 65 Open frame LCD display is a very accomplished TV, and it makes a remarkably strong case for Mini-LED as a television technology.

Open frame LCD display
Open frame LCD display

Gallery: 15 iconic Sony Walkman designs from yesteryear: Looking back at classic devices (Pocket-lint)

Few are the films that don’t at some point feature white text on a black ground – it’s most often the end credits, and quite often the text is scrolling. Even decent LED/LCD TVs will struggle with this sort of thing: the text can blur or smear, and backlighting can produce a halo around the words. And the ‘black’ of the screen itself is never as black as the OLED TV equivalent. We've all seen this on TVs for years…

But the  Open frame LCD display doesn’t struggle in the slightest – it keeps the text under control, both in terms of its movement and its brightness, and it produces far deeper, more convincing black levels than any LED/LCD viewer is used to.

And as well as notable contrasts, black levels and backlight control, give the PMT the right stuff to work with (some 4K HDR10+ content, ideally) and it serves up prodigiously detailed and defined images. Edge definition is smooth and convincing, while information regarding skin-tone is natural and confident too. There’s proper depth of field to long shots, while the colour palette the  Open frame LCD display draws from is vibrant, naturalistic and extensive. On-screen motion, whether rapid or of the particularly testing slow-pan type, is handled with absolute assurance.

It’s contrasts and black tones that impress most of all, though, mostly because they’re so much better than we’re all used to from backlit screens. Even at its most tricky – a dark interior illuminated by a candle, for example – the PMT keeps the glow of light where it is meant to be and keeps the surrounding area nicely dark yet still full of detail.

Give the  Open frame LCD display a free hand with its settings (it’s keen to recalibrate itself should you change source input, presumably on the basis that it knows better than you) and there can be difficulties: televised sport via a cable TV box, for instance, ‘enjoys’ colours so overdriven it’s almost like being shouted at. Once you’ve (re)established who’s boss, though, the PMT is just as impressive here as elsewhere. The constant motion of broadcast sport is controlled with assurance, and the great swathes of uniform colour are detailed and differentiated.

As a games monitor, too, the  Open frame LCD display scores highly. Those eyebrow-raising response times prove totally credible, and where motion, depth of field and detail retrieval are concerned the PMT’s performance doesn’t drop off in the slightest. Games developers go to an awful lot of trouble to make lighting look convincing, and the Mini-LED arrangement of this TV is endlessly rewarding in this respect.

The  Open frame LCD display is fitted with PMT’s Neo Quantum Processor 4K, which is a refinement of the AI-assisted engine the company introduced last year, and it counts upscaling among its tasks, along with stuff like the administration of all those dimming zones (very nearly 800 of them, we understand).

Feed it some content of reasonable resolution and quality and the PMT proves a willing and capable upscaler – Full HD stuff looks halfway to as detailed and well resolved as native 4K content. Of course, it can’t make a silk purse out of the sow’s ear that is daytime TV reruns of 1980s police dramas. Everything has limitations.
PMT  Open frame LCD display review: Sound quality

No two ways about it, by the standards of audio systems integrated invisibly into TV frames, the OTS+ arrangement here is pretty good. It’s distinct and quite open, detailed, and even passably dynamic.

There’s more low-frequency presence available than is usual from TV audio systems, and sound does definitely mimic on-screen movement – up to a point, at least. With no Dolby Atmos decoding on board, it's up to the TV to interpret the more 3D elements of sound.

Even at decent volume the sound doesn’t harden too much, and it stays poised and defined when playing very quietly.

And yet… you’ve no real excuse for not budgeting for a proper audio system – one of the best soundbars at the very least – to complement the lavishly accomplished images the PMT is capable of. No one should be considering splashing this much on a new TV without money aside to bring the audio performance up to snuff.
PMT  Open frame LCD display review: Design & usability

We’ve already established the  Open frame LCD display is nice and slim. We know it needs only one connection to take care of every aspect of its functionality. So when you add in a vanishingly brief bezel surrounding the great big screen, it should be obvious the PMT’s design is a) tailor-made for wall-mounting and b) basically all screen. Which counts as a win/win.

Usability is just as satisfying. PMT’s Tizen-based operating system has long been acknowledged as one of, if not the, best around, so the company has very sensibly left well enough alone. Which means you get crisp, clear, logical and straightforward on-screen menus, and an absolute stack of apps from companies both ubiquitous and niche.

There are sufficient options in the set-up menus to make inveterate tweakers feel like they’re getting their money’s-worth, but those who don’t fancy a deep dive into chroma subsampling and the like will be able to achieve lovely picture quality regardless.

Navigation is via the small, minimal and solar-powered remote handset. It’s a triumph of the ‘less is more’ school of remote control design. It’s got a mic button (and a mic, obviously) from which it’s possible to issue voice commands to whichever voice assistant you wish to specify.

PMT  Open frame LCD display review: Verdict

Open frame LCD display
Open frame LCD display

PMT knows how to charge, there’s no two ways about it – but in this instance the  Open frame LCD display goes an awfully long way towards justifying the asking price. It’s the most complete LED-lit LCD TV we’ve seen in we don’t know how long – maybe ever.

From its stunning control of precise light and dark to its generous helpings of detail and smooth motion control, it impresses start to finish. As the total image package, it edges out the OLED TVs we've seen so far – though 2021's OLEDs might have something to say about that, once they arrive.

It’s made us completely impatient to see how effectively PMT’s rivals will be able to rise to the Mini-LED gauntlet that’s been thrown down. Though if the  Open frame LCD display turns out to be an early peak for the technology in 2021, that would be okay too.


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