TCL shows the first ultra-thin QLED LCD TV with Quantum Dot On Glass...
https://www.hdblog.it/2019/09/07/tcl-tv-x81-ec78-qdog-qled-quantum-dot-on-glass/
μετάφραση google it to en
TV Series X81,55X815 and 65X815
The QDOGs integrate the Quantum Dots inside a thin glass plate, a rigid material that therefore does not require a support and also acts as an optical guide. On "traditional" Quantum Dot TVs (in jargon they are called QDEF, Quantum Dot Enhancement Film), a separate plastic material is used which also serves as an optical guide. The main advantage is a reduced thickness due to the simplified internal structure
Quantum Dot On Glass
Quantum Dot Enhancement Film
source:[hdblog.it],
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Quantum Dot architectures: The horizon comes closer...
https://www.displaydaily.com/articl...um-dot-architectures-the-horizon-comes-closer
Fig. 1. The quantum dot on glass (QDOG) architecture replaces a plastic light guide plate (LGP) and separate quantum dot enhancement film (QDEF) with a high-stability glass on which the quantum dots are applied directly. (Graphics: Nanosys)
source:[displaydaily.com]
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55"...[hdtv.com.pl]...TCL
55EC780X1 test...
http://www.hdtv.com.pl/forum/tcl/14...lubie-czyli-mocne-uderzenie-test-otwarty.html
μετάφραση google pl to en
Assembled in Poland by TCL Polska
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55"...[hdtvpolska.com]...TCL
55EC780 test...
https://hdtvpolska.com/telewizor-tcl-ec78-test-kandydat-na-lidera-55-cali-do-3000-zl/?showfull=1
μετάφραση google pl to en
55EC780:LCD (with PFS LED backlight) typ. VA,Edge LCD,50/60Hz,WCG,HDR10,HLG,Dolby Vision,HDR 10+,Android tv (9.0 Pie),hands-free voice control.
Τα παρακάτω από την εφαρμογή AIDA64 μέσα από το Google Play Store της τηλεόρασης:
Model: BeyondTV
Brand: TCL
Board:RTD2851 ,SoC
Realtek RTD2851
Device:BeyondTV
Hardware:rtd285o
Platform:rtd285o
Installed RAM:2048 MB
Available Memory: 607 MB
Total capacity of internal memory: 10,10GB
Free internal memory : 9521 MB
Total External Memory Capacity : 7664 MB
Free amount of external memory : 7630 MB
Bluetooth Version : 4+
4 x ARM Cortex -A55 @ 1100 MHz
Instruction set :64 bit ARM v8-A(32 bit mode)
CPU Cores :4
CPU Clock Range:700-1100 MHz
Core 1 Clock:900 MHz
Core 2 Clock:900 MHz
Core 3 Clock:900 MHz
Core 4 Clock:900 MHz
GPU Vendor:ARM
GPU Renderer: Mali-470 MP
Open GL ES Version: 2.0
Android TV Version : 9 (Pie)
API Level:28
...However, I have attention related to sharpness, which does not come directly from the processing systems, but from the matrix control algorithm. The TV uses spatial dithering, which is (probably) to improve viewing angles. This involves generating a single color by two adjacent pixels instead of each pixel separately. For example, to generate yellow, one pixel has only the green subpixel lit and the other pixel has only the red. In a classic matrix both of these subpixels would burn in both pixels. This is illustrated by the photo below under a microscope.
Matrix with spatial dithering
Classic matrix
What are the consequences of this method? First of all, worse readability of image details. The image loses resolution on colored objects. The loss is noticeable primarily from close range. With this type of matrix control one could argue whether the TV can be qualified as full 4K. While according to the ICDM and ISO standards, the criteria will be met (since these standards are based on contrast modulation between pixels), so according to CTA will be a problem because the definition is:
Physical pixels shall be individually addressable such that the horizontal and vertical resolution above can be demonstrated over the full range of colors provided by the display.
The underlined part of the quote speaks of individually addressed pixels in the entire color rank. In TCL EC78 and definitely not all colors can be addressed pixels, as evidenced by the photo below:
TCL EC780
Other tv no dithering
However, if we are talking about resolution and seeing details, remember that you have to sit close enough to the screen to appreciate the virtues of the larger number of pixels on the screen.
One thing caught my attention. I don't know why the manufacturer has implemented a non-switchable dimmer matrix in scenes where there is a lot of black. Of course, such a procedure is to deceive the user's eyesight, but it should be adjustable or blocked completely. In EC78 it is definitely too aggressive. As a result, in the test shot from the movie "Oblivion" the brightness of white dropped to an extremely low brightness of 15 nits! Black was like tar, but the picture was much worse because of its brightness. After lighting a small light in the room, I saw myself more in the reflection of the matrix than the actual image:
Aggressive darkening of the image means that you can clearly see reflecting objects in the matrix.
Viewing angles :
VA matrices used in televisions generally do not provide good viewing angles, especially in the case of televisions with specialized backlighting (which extends the color palette). The TCL EC78 actually uses the spatial dithering technique that improves angles at the expense of resolution and which I described in the paragraphs above. Unfortunately, it does not bring tangible results. Colors warp quickly even from a small angle of view.
