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We finally received the TCL 65C825 TV with a 100Hz VA LCD panel and a backlighting system that is supposed to offer a good peak of brightness and a reduction of blooming

interesting at this price. First focus on the HDR capabilities of this model.

<!–[if IE 9]><!–[if IE 9]> Le TCL 65C825 et son rétroéclairage à mini-leds.

The TCL 65C825 and its Mini-Led backlight.

Manufacturer TCL was one of the pioneers of Mini-Led technology with its 65X10 TV released in 2020. The brand is doing it again this year with the 65C825 65-inch model which, while it makes do with 160 zones compared to 768 for the X10, is more affordable with a price tag of around €1600. The TCL 65C825 is in direct competition with last year’s Oled models like the LG 65CX

or some of Samsung’s Mini-Led models like the Neo Qled QE65QN85A that we haven’t tested yet. We will be interested here in the HDR rendering of the TCL 65C825 and see if the mini-led backlighting system brings a better dynamic range of the image, especially in terms of brightness.

The bright, but wacky dynamic HDR mode<

!–[if IE 9]><!–[if IE 9]>Courbe EOTF en HDR10, fenêtre de 10 %. Mode Intense

EOTF curve in HDR10, 10% window.

Intense mode

<!–[if IE 9]><!–[if IE 9]>Courbe de luminance HDR, fenêtre de 10 %. Mode Intense

HDR luminance curve, 10% window.

Intense Mode

In Dynamic HDR picture mode, the peak brightness is measured at 999 cd/m²

.

The TCL TV does better than the majority of Oled TVs whose peak brightness does not exceed 750 cd/m², with the exception of the impressive Panasonic TX-65JZ2000 with its Oled Professional panel which exceeds 950 cd/m². However, the reference luminance (in yellow) is not respected at all and the displayed image is systematically too bright in this HDR mode.

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<!–[if IE 9]><!–[if IE 9]><img src=”https://dyw7ncnq1en5l.cloudfront.net/assets/2021/07/15/1626354564488/newebfrontstyleguide/build/img/svg/lazyload-placeholder.svg” alt=”HDR Colorimetry – Dyn Mode

amique” />

HDR Colorimetry – Dynamic Mode

Dynamic HDR Colorimetry

As with all TVs on the market, the colorimetry in dynamic mode is bad. The colour temperature is fancy and pulls way too much towards blue while the colours are totally wrong. We measured a delta E of 26.6, far, far away from a delta E of 3 below which colors are considered faithful. In fact, all colors are far too saturated. For example, a pale yellow will turn into a fluorescent yellow.

An even brighter Standard HDR mode<

!–[if IE 9]><!–[if IE 9]>Courbe EOTF en HDR10, fenêtre de 10 %. Mode Standard

EOTF curve in HDR10, 10% window.

Standard Mode

<!–[if IE 9]><!–[if IE 9]>Courbe de luminance HDR, fenêtre de 10 %. Mode Standard

HDR luminance curve, 10% window.

Standard Mode

Max.

1099 cd/m²

Surprisingly enough, the standard HDR mode shows an even higher peak brightness than the dynamic mode

.

In this mode the TV manages to exceed the 1000 cd/m² mark with a peak measured at 1099 cd/m². Again, no need to talk about fidelity since the reference luminance curve is not respected at all and the brightness is systematically higher than requested.

<!–[if IE 9]><!–[if IE 9]> Colorimétrie HDR Standard

Colorimetry HDR Standard

On the

side of color fidelity, it’s a little better than the dynamic mode, but in absolute terms, it remains very, very bad and nothing displayed on the screen is related to the image requested by the source…

The HDR Film mode well calibrated and brighter than the Oled<

!–[if IE 9]><!–[if IE 9]>Courbe EOTF en HDR10, fenêtre de 10 %. Mode Standard

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EOTF curve in HDR10, 10% window.

Standard Mode

<!–[if IE 9]><!–[if IE 9]>Courbe de luminance HDR, fenêtre de 10 %. Mode Standard

HDR luminance curve, 10% window.

Standard Mode

Fortunately for TCL, everything falls into place with the HDR Film mode which is perfectly calibrated. The reference EOTF curve is perfectly respected and the TV even has the luxury of smoothing the if

gnal from 65% luminance in order to keep the details in the very bright areas of the picture up to the maximum capacity of the TV. In this mode, the peak brightness measured at 934 cd/m² remains quite high and is better than the majority of Oled TVs on the market. As a reminder, the LG 55C1 of 2021 reaches 740 cd/m², not far from the LG G1 and Sony A90J equipped with the new Oled Evo panel which exceed 780 cd/m². On the other hand, the TCL TV is not the brightest on the market as the Sony 65XH9505 reaches 1070 cd/m² in Expert mode with a Full-Led system, while the Samsung Neo Qled QE65QN95A peaks at 1570 cd/m² in Cinema mode with its mini-LEDs spread over 864 zones.

<!–[if IE 9]><!–[if IE 9]> Colorimétrie HDR – Mode Film

HDR Colorimetry – Film Mode


In this mode, the TV is perfectly calibrated. The average delta E drops to just 2.1, which is below 3 – the threshold below which the human eye can no longer distinguish between colour shades. The colors can thus be considered perfectly faithful to those sent by the source, and thus to the vision of the director.

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See you on Monday 2 August 2021 for the full review of the TCL Mini-Led LCD TV.

TCL 65C825 <!–[if IE 9]><!–[if IE 9]><img src=”https://dyw7ncnq1en5l.cloudfront.net/as sets/2021/07/15/1626354564488/newebfrontstyleguide/build/img/svg/lazyload-placeholder.svg” alt=”TCL 65C825″ />

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