Flat Panel and LCD Screens: Part 1

2018-02-13T16:36:45+00:00

Liquid crystal display (LCD) screens are omnipresent in our technologically saturated lives.  Having largely displaced the older CRT screens, LCDs make up a large portion of the digital imaging we see all around us.  They are present in everything from our ubiquitous smartphones and computer screens to digital billboards, wristwatches and vehicle and aircraft instrumentation.  How do flat panel LCD screens work? One can often find videos and articles documenting eager teardowns of new devices, but few delve beyond the hardware and into the materials and design behind the screen itself.  For this series of blog posts, we will be review some aspects of display technology , why they work, and how they are assembled.  To illustrate my points, I’ve disassembled a legacy Sony Ericsson® S500i phone [...]

Flat Panel and LCD Screens: Part 1 2018-02-13T16:36:45+00:00

Flat Panel and LCD Screens, Part 2

2018-02-22T10:23:01+00:00

Figure 1: Unpowered Sony Ericsson S500i LCD screen at 200x magnification In our last blog post, I wrote about some of the physics and materials science principles that go into the design and manufacture of liquid-crystal display (LCD) screens.  The eponymous liquid crystals (LCs) in such a display have to be quite small in order to create a seamless image; as I mentioned in the last entry, the subpixels (the red, green and blue elements comprising a pixel, visible in Figure 1) can be smaller than a red blood cell.  Each of these subpixels needs its own control system that interacts with the data drivers along the periphery of the screen.  These power and control circuit components [...]

Flat Panel and LCD Screens, Part 2 2018-02-22T10:23:01+00:00