Display
54.6", 3840 × 2160 (4K UHD), VA, Direct LED
54.6
Refresh rate
48Hz – 120Hz
48Hz
Dimensions
1224 × 709 × 69 mm
1224
Weight
—
Processor
AIPQ with AI
Overview
A 120 Hz native panel gives the TCL 55Q77K a gaming edge among 54.6-inch 4K Direct LED TVs. The Direct LED VA panel supports Dolby Vision, HDR10+, HDR10, HLG, with 120Hz native refresh and 240Hz. FreeSync Premium Pro, HDMI Forum VRR, G-Sync compatibility and ALLM strengthen gaming, while 2 x HDMI 2.1 + 2 x HDMI 2.0 covers sources. Google TV and the AIPQ with AI processor handle streaming and upscaling. The DCI-P3 field incorrectly contains “1.07 Billion Colors”, so no valid gamut percentage is available. Against the 65Q77K, the practical differences are screen size, stand footprint, weight and VESA pattern rather than the core family platform. Buy it if 120 Hz-class gaming and a large Direct LED screen matter more than Mini LED; skip it if strong, measured HDR performance is the priority.
BrandTCLPanel TypeVAResolution3840 × 2160 (4K UHD)Refresh Rate120 Hz native with a published 240 Hz accelerator mode
Key Highlights
- 55Q77K combines a 54.6-inch Direct LED display with 3840 × 2160 (4K UHD)
- 120 Hz native with a published 240 Hz accelerator mode, - and ALLM define its gaming capability
- Dolby Vision, HDR10+, HDR10, HLG provides the published HDR format support
- 2 x HDMI 2.1 + 2 x HDMI 2.0 plus No dedicated output listed cover the main source and sound connections
- Against the 65Q77K, the practical differences are screen size, stand footprint, weight and VESA pattern rather than the core family platform.
Who Should Buy the tcl 55Q77K
+ Best For
4K streaming
Google TV and the AIPQ with AI processor provide apps and picture processing.
High-refresh gaming
120 Hz native with a published 240 Hz accelerator mode and - suit compatible consoles and PCs.
External audio
No dedicated output listed supports a soundbar or receiver route.
Planned installation
the 54.6-inch screen works when its 1224 mm and - are checked first.
× Not Ideal For
Measured HDR comparison
The DCI-P3 field incorrectly contains “1.07 Billion Colors”, so no valid gamut percentage is available.
Desktop monitor use
DisplayPort video is not listed.
Flexible tabletop positioning
no tilt, height, swivel or pivot range is published for the supplied stand.
Unplanned furniture placement
1224 mm and 292 mm require checking before delivery.
Display Performance
Refresh Rate
120 Hz native with a published 240 Hz accelerator mode
Native and accelerator figures are separated where the sheet provides both.
Response Time
Not published
No pixel-transition figure is published for 55Q77K.
Brightness
Not published
No usable luminance figure is available.
Contrast
High (VA Panel)
This is the source-sheet claim, not a measured result.
Colour Gamut
1.07 Billion Colors
Coverage does not guarantee calibration accuracy.
HDR
Dolby Vision, HDR10+, HDR10, HLG
The DCI-P3 field incorrectly contains “1.07 Billion Colors”, so no valid gamut percentage is available.
Gaming Performance
Refresh Rate120 Hz native with a published 240 Hz accelerator modeThis is the published motion/input capability for 55Q77K.
Response TimeNot publishedMotion clarity cannot be judged from a missing transition figure.
VRR / Adaptive SyncYes, YesCompatible sources can reduce tearing and request game mode automatically.
GPU Requirement3840 × 2160 (4K UHD) at the highest published rateNative 4K near the ceiling needs a capable console or high-end GPU.
HDR & Brightness Reality
The 55Q77K accepts Dolby Vision, HDR10+, HDR10, HLG on a Direct LED VA panel. -, while local-dimming hardware is not listed. The 120 Hz-class panel benefits motion and gaming more than HDR contrast. Dolby Vision and HDR10+ confirm format support, but the missing or modest luminance data means buyers should not expect Mini LED-level highlights or black control. Bright-room performance therefore remains uncertain from the sheet alone.
Connectivity & Ports
HDMI2 x HDMI 2.1 + 2 x HDMI 2.0These are the exact versions and counts listed for 55Q77K.
DisplayPortNone listedPC video must use HDMI because no DisplayPort input is published.
USB-CNone listedDo not assume laptop video or charging unless the sheet states it.
USB Hub1 x USB 3.0 Type-A + 1 x USB 2.0 Type-AThese ports are listed for media or accessories, not a full laptop dock.
Audio OutNo dedicated output listedUse the listed return channel or dedicated output for external sound.
Real-World Use Cases
Google TV and AIPQ with AI cover apps, navigation and 4K processing
Dolby Vision, HDR10+, HDR10, HLG defines the supported HDR formats
120 Hz native with a published 240 Hz accelerator mode, VRR and ALLM suit compatible sources
No dedicated output listed supports a soundbar or receiver connection
Pros & Cons
Pros
- 54.6-inch VA panel with Direct LED
- 120 Hz native with a published 240 Hz accelerator mode with and ALLM
- Dolby Vision, HDR10+, HDR10, HLG format support
- 2 x HDMI 2.1 + 2 x HDMI 2.0 plus No dedicated output listed
- Against the 65Q77K, the practical differences are screen size, stand footprint, weight and VESA pattern rather than the core family platform.
Cons
- The DCI-P3 field incorrectly contains “1.07 Billion Colors”, so no valid gamut percentage is available.
- No DisplayPort video input is listed
- The supplied stand has no published positional adjustment
- Response time is not published
Score & Ratings
7.8/10
Great
Television Identity & Market
5
| Specification | Value |
|---|---|
| Brand | TCL |
| Series | Q77K |
| Model | 55Q77K |
| Model Year | 2025 |
| Available Colors | Black |
Screen Geometry & Format
4
| Specification | Value |
|---|---|
| Screen Size | 54.6-inch |
| Marketed Screen Size | 54.6-inch |
| Aspect Ratio | 16:9 |
| Screen-to-Body Ratio | 94.84% |
Panel Architecture & Light Control
3
| Specification | Value | What It Means |
|---|---|---|
| Panel Type | VA | VA gives 55Q77K its stated panel behaviour; viewing angle and black level still depend on the actual implementation. |
| Panel Bit Depth | 10-bit (8-bit + FRC) | 10-bit (8-bit + FRC) supports the listed gradation range on 55Q77K; it does not prove factory colour accuracy. |
| Display Colors | 1.07 Billion Colors |
Surface Treatment & Viewing Layer
1
| Specification | Value |
|---|---|
| Screen Coating | Glossy |
Resolution, Scaling & Signal
3
| Specification | Value |
|---|---|
| Native Resolution | 3840 × 2160 (4K UHD) |
| Pixel Density | 80 PPI |
| Pixel Pitch | 0.315 mm |
◑
Luminance, Blacks & Contrast
3
| Specification | Value |
|---|---|
| Static Contrast | High (VA Panel) |
| Static Contrast Ratio | High (VA Panel) |
| Viewing Angles | 178° / 178° |
Color Reproduction & Calibration
1
| Specification | Value | What It Means |
|---|---|---|
| DCI-P3 Coverage | 1.07 Billion Colors | 1.07 Billion Colors is the value entered for 55Q77K; it indicates colour range only when the field contains a valid percentage. |
HDR Formats & Tone Mapping
1
| Specification | Value | What It Means |
|---|---|---|
| HDR Support | Dolby VisionHDR10+HDR10HLG |
Dolby Vision, HDR10+, HDR10, HLG lets 55Q77K accept these formats, while hardware measurements decide whether HDR actually looks convincing. |
Motion Processing & Response
3
| Specification | Value | What It Means |
|---|---|---|
| Native Refresh Rate | 120Hz | 120Hz is the base panel cadence for 55Q77K; higher accelerator labels may require lower resolution or processing. |
| Maximum Refresh Rate | 240Hz | |
| Motion Processing | 240 MR |
Console, VRR & Game Tools
4
| Specification | Value |
|---|---|
| Variable Refresh Rate | Yes |
| Auto Low Latency Mode | Yes |
| AMD FreeSync | Yes |
| Game Mode | Yes |
Broadcast Tuners & Reception
5
| Specification | Value |
|---|---|
| Built-In TV Tuner | Yes |
| Tuner Configuration | ATSCAnalog (NTSC / PAL / SECAM)Clear QAM |
| Analog Tuner | NTSC / PAL / SECAM |
| North American Digital Tuner | ATSC |
| Clear QAM | clear qam |
Compute, Memory & Storage
1
| Specification | Value |
|---|---|
| Processor Brand Name | AIPQ with AI |
Smart Platform & System
2
| Specification | Value | What It Means |
|---|---|---|
| Smart TV | Yes | |
| Operating System | Google TV | Google TV provides 55Q77K's apps and smart-TV interface without an external streamer. |
HDMI Signal Interface
5
| Specification | Value |
|---|---|
| Total HDMI Ports | 4 |
| HDMI 2.1 Ports | 2× HDMI 2.1 |
| HDMI 2.0 Ports | 2× HDMI 2.0 |
| Auto Low Latency Mode | Yes |
| Variable Refresh Rate | Yes |
USB, Audio & Legacy I/O
3
| Specification | Value |
|---|---|
| Total USB Ports | 2 |
| USB-A 2.0 Ports | 1× USB 2.0 |
| USB-A 3.0 Ports | 1× USB 3.0 |
Wireless, LAN & Casting
4
| Specification | Value |
|---|---|
| Wi-Fi | Yes |
| Bluetooth | Yes |
| Wi-Fi Direct | Yes |
| DLNA | Yes |
Speaker Layout & Output
5
| Specification | Value |
|---|---|
| Built-In Speakers | Yes |
| Speaker Configuration | 2.0 CH |
| Speaker Channels | 2.0 CH |
| Built-In Subwoofer | Yes |
| Subwoofer Configuration | 20W |
Sound Formats & Enhancement
4
| Specification | Value |
|---|---|
| Dolby Atmos | Yes |
| Dolby Digital | Yes |
| Dolby Digital Plus | Yes |
| DTS Virtual:X | DTS Virtual:X |
Panel-Only Size & Mass
3
| Specification | Value |
|---|---|
| Width Without Stand | 1224 mm |
| Height Without Stand | 709 mm |
| Depth Without Stand | 69 mm |
Assembled TV Size & Mass
3
| Specification | Value |
|---|---|
| Width With Stand | 1224 mm |
| Height With Stand | 769 mm |
| Depth With Stand | 292 mm |
Exterior Styling & Stand Footprint
1
| Specification | Value |
|---|---|
| Chassis Color | Black |
Wall Mounting & Installation
3
| Specification | Value |
|---|---|
| VESA Mount | 300 × 300 mm |
| VESA Interface | 300 × 300 mm |
| VESA Size | 300 × 300 mm |
Electrical Load & Efficiency
5
| Specification | Value |
|---|---|
| Power Input | 100–240V |
| AC Frequency | 50–60Hz |
| Typical Power Consumption | 225 kWh |
| Average Power Consumption | 225 kWh |
| Standby Consumption | 0.5W |
Gaming Validation & Compatibility
1
| Specification | Value |
|---|---|
| ALLM | Yes |
Regulatory & Industry Approvals
1
| Specification | Value |
|---|---|
| CE | Yes |
In-the-Box Components
1
| Specification | Value |
|---|---|
| Screen Size | 54.6-inch |
Frequently Asked Questions
01 What separates the 55Q77K from the 65Q77K? +
Against the 65Q77K, the practical differences are screen size, stand footprint, weight and VESA pattern rather than the core family platform.. The core family platform remains closely related, so ports, size and installation figures deserve the closest comparison.
02 Which HDR limitation matters most on the 55Q77K? +
The DCI-P3 field incorrectly contains “1.07 Billion Colors”, so no valid gamut percentage is available. Format badges confirm compatibility, but they do not replace luminance, contrast and dimming measurements.
03 How should buyers read the gaming figures on the 55Q77K? +
The sheet lists 120 Hz native with a published 240 Hz accelerator mode with - and ALLM. Accelerator modes should not automatically be treated as native 4K operation at the same rate.
04 Which connections are actually published for the 55Q77K? +
The source lists 2 x HDMI 2.1 + 2 x HDMI 2.0 and 1 x USB 3.0 Type-A + 1 x USB 2.0 Type-A. External audio uses No dedicated output listed, while DisplayPort is absent.
05 What must be checked before installing the 55Q77K? +
With the stand it is 1224 mm wide, 292 mm deep and -. Wall mounting requires 300 × 300 mm and a suitable weight rating.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № 55Q77K