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The Panasonic BT-4LH310 31" 4K Production Monitor is suitable for a variety of production environments both in studio and out in the field. It features a 10-bit, 31" LCD panel that is LED backlit, and has a DCI-spec 4K (4096 x 2160) native resolution. It will accept 4K sources through SDI, HDMI, and DisplayPort. In addition to DCI 4K, it will accept QFHD/UHD 4K (3840 x 2160), 2K, and high definition video sources along with up to 16 channels of embedded audio.
The monitor features four 3G-SDI inputs. When used with 4K signals, the image is split into quadrants and all four inputs will be combined into one 4K image. It features two HDMI inputs. Depending on the frame rate, bit-depth, and chroma sub-sampling one or both inputs may be required for 4K signals. And it features two DisplayPort inputs. As with HDMI, one or both inputs may be require, depending on the bandwidth of the 4K signal. For all other resolutions up to 2K only a single input per image is required. This means that in non-4K applications the four SDI inputs can be used to create a "quadview image", displaying all four images on screen at once.
For local audio monitoring there is a stereo headphone jack as well as a 0.5W mono speaker. The monitor can be controlled remotely using RS-485, RS-232C, or GPI and has a tally port that will trigger red, green, or amber LED tally lights above the display. The monitor includes a removable desktop stand, and also features a VESA 200 x 200mm hole pattern on the back so that it can be attached to many standard monitor mounts.
10-Bit LED Backlit Panel
The monitor supports 4K through four SDI, two HDMI, and two DisplayPort inputs. For HDMI and DisplayPort 4K sources one or both inputs may be required, depending on the bandwidth; for SDI all four inputs will always be used. Supported frame rates, bit-depths, and chroma sub-sampling ratios include:
3840 x 2160 (UHD)
HDMI: Supports up to 60p at 8-bit, 4:4:4 when using two HDMI connections
DisplayPort: Supports up to 60p at 10-bit, 4:4:4 when using two connections
3G-SDI: Supports up to 30p at 10-bit 4:4:4; 60p at 10-bit 4:2:2 - four connections always required
4096 x 2160 (DCI 4K)
HDMI: Supports up to 60p at 8-bit, 4:4:4 when using two connections
DisplayPort: Supports up to 60p at 10-bit, 4:4:4 when using two connections
3G-SDI: Supports up to 60p at 10-bit 4:2:2; 24 or 25p at 12-bit 4:4:4 - four connections always required
In-Plane Switching Technology (IPS)
The LCD panel features in-plane switching, designed to provide greater off-axis viewing angles before significant loss of image quality is experienced when compared to non-IPS panels
Wide Color Gamut
Covers 100% of BT709, EBU and SMPTE-C color gamut specifications for television applications, and covers 96% of the DCI (P3) color gamut specification for digital cinema applications
LUT Upload Function
Allows user-defined lookup tables (LUTs) to be imported, ensuring the same calibration parameters are adhered to when the footage is viewed, edited, or color-corrected across multiple monitors
3D-LUT and 6-Pole Color Correction
Designed to eliminate color phase shifts (drift) in the LCD panel caused by luminance level differences. By providing a look-up table (LUT) for each luminance level and applying 12-bit image processing to each RGB color, it balances the six coordinate poles of the three primary colors (RGB) and their complementary colors (CMY). This is designed to help reproduce the intermediate shades of extremely fine colors
The built-in calibration function can be used to automatically adjust the white balance, which can drift out of calibration over time, by using commercially available probe sensors and display analyzers. Compatible calibration devices include:
Konica Minolta: PU32, PU35, PSU32, PSU35, CA 310
Photo Research: PR 655
Xrite: i1 Pro
Equipped with two focus assist modes:
Focus-In-Red: Overlays a red peaking outline over the parts of the image that are in focus
Zoom (4K): Enlarges either the center section of the image or one of the quarter sections 4x and displays it on the full screen
Y-Map, Zebra, and RGB Display Modes
Y-Map: Creates a false color image by assigning each luminance step a discrete color and overlays a reference chart identifying the luminance value of each color
Zebra: Similar to in-camera zebra overlays, generates 45° bands across parts of the image that exceed a certain, user-defined exposure level
RGB Color: Allows you to selectively view only one or two RGB channels at a time
Markers and Grids
Aspect Marker: Capable of indicating an image area in one of up to eight aspect ratios: 16:9 (only when 17:9 is set), 4:3, 13:9, 14:9, CNSCO2.39, CNSCO2.35, 2:1
Safe Area Marker: Within 17:9, 16:9, and 4:3 aspect ratios: 95%, 93%, 90%, 88%, 80%, USER, DOT / LINE, or VAR (user-defined)
Center Marker: Designates the center of the image, and can be used with other markers enabled
Cross Hatch Grid: A grid overlay to help determine if the camera is level on the horizon
Quad Display (2K / HD)
Taking advantage of 4K resolution when working with sub-4K video sources. The Quad Display function displays a waveform monitor (WFM) and a vector scope (VSC) as well as one of the Focus-in-Red, Y Map, or Zebra assist functions simultaneously with a full-pixel image from a 2K (2048 x 1080) or HD input source
Allows a still image to be captured from video and temporarily displayed on the monitor. This function is useful for comparing camera angles or colors between takes or scenes
Transmission and other errors are detected in the SDI source, and the error status is displayed and logged
Audio Level Meter
The audio level meter can be overlaid on the displayed image. Up to eight channels can be simultaneously displayed, and a peak hold function is included. For 3G-SDI input, channels 1-8, or channels 9-16 can be selected
Time Code and Closed Caption Display
Can display either VTC or UB time code on one line, or both VTC and UB on two separate lines. From 2K and HD-SDI sources, can display EIA/CEA 708 closed captions
Designed to provide a robust enclosure for the LCD panel for added confidence when using the monitor in the field
Accepts 28VDC power to use in the field with professional battery systems. When both DC and AC are connected simultaneously, the AC source takes precedence
Fanless, self-cooling design provides silent operation, for distraction-free use even in quiet editing rooms
Mercury Free LED Backlight
Backlight contains no mercury as an environmental protection measure
Speakers and headphone jack on front panel
Includes detachable stand
Key Lock function disables front panel controls, except for the power switch, menu operation and audio level adjustment
Functions can be assigned to five function keys for one-touch operation
Energy-saving Auto Power Down when there is no signal
input or operation