When placed side - by - side , it becomes straightaway obvious why an OLED electronic computer screen can cost 100 to thousands of dollars more than a traditional LCD display : the OLED ’s contrast and black levels far outperform it . But is there a means for LCDs to catch up ? There is , if you’vegot the ironware hacking skillsto stack two of them together .
You ’ve probably detect that the parts of your LCD goggle box or monitor that are supposed to look fateful in reality end up looking a lot more gray . The return comes from how the exhibit technology form . LCD control board do n’t farm any light of their own , and instead rely on a glow venire behind them to produce a visible full - color image . To recreate blacks , liquid crystal display attempt to entirely block the Christ Within come from behind them from scramble through , but they ’re not great at it , which is why the colored field of their images tend to look gray .
There have been some improvements made to LCD screen technology to help advance their power to properly exhibit the black parts of an paradigm , include break up their backlights into smaller zone that can be selectively turn over on and off as needed , but the results have never come up tight to the performance of OLED displays , which let single pixels to be altogether work on and off .
Gif:YouTube - DIY Perks
But what if an LCD board could be almost as honest at direct contrast as an organic light-emitting diode ? Matt Perks , from theYouTube groove DIY Perks , wondered if two LCD panels stacked atop each other would be better at block the light from an illuminated panel from getting through . The rule is similar to give on an extra blanket on a frigid night to aid prevent soundbox heat from escaping .
The answer , surprisingly , was yes , but it took a caboodle to make it happen , and there were still some carrying into action compromise . The first trouble that Perks had to manage with when creating a double - layer LCD display was neutralize the effects of polarized filter , which help ameliorate the effigy calibre of LCD screens but get in the way if you ’re put one jury over another . Removing them was n’t an choice , but a round-eyed layer of retrace paper sandwich between the two was enough to remove the problem … while create others .
The whole point of layering two LCD panel was to block light , but the add layer of tracing paper also reduced the intensity of the light so much that it was difficult to produce an actual simulacrum . The result was to build an upgraded light dialog box behind the dual - stratum LCD screen , which then required even more layers to circularize the LED lights , which mean more mightiness and even cool , courtesy of four big lover on the back . On top of all of that , each LCD control board still needed its own comptroller , resulting in a custom screenland value several inches deep .
Gif:YouTube – DIY Perks
The upshot of this shape are telling , with the usance CRT screen offering a much improved contrast ratio , and blackness that truly search as dark as if the showing were turned off . Brighter areas had more saturation and intensity , too , but overall , even with the promote light panel suck more might , the customs screen still was n’t as bright as either of the LCD screens used to construct it originally were . It also exhibit some unwanted artefact around fine details , include some noticeable flower around livid text , and almost a drop fantasm effect on black text . It ’s far from everlasting , but the build actually cost substantially less than a similarly - sized OLED cover would , so maybe it was worth all the effort ?
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