Deepsky's Variable Current Technology achieves an impressive 19-bit grayscale, setting a new standard for color depth and accuracy in LED displays.

Central to Deepsky's video processing pipeline is the ability to accurately change the LED current in GEMINI, our patented IC driver (US patent US11,361,707, CN201880098920.8).

From 0 to approximately 50 nits, HUBBLE, Deepsky's GPU processor, instructs GEMINI to operate at its lower LED current setting (around 0.156mA). This results in low-amplitude LED light pulses, allowing the Delta Sigma linear modulator to achieve a very fine control over the LED brightness.

Once the maximum brightness achievable at this lower current is reached (around 50 nits), HUBBLE progressively increases the current instructions for the various GEMINI drivers on the screen. This leads to a gradual increase in overall display brightness.

Deepsky's processing pipeline approximates the exponential electro-optical transfer function (EOTF) using segmented, geometric slopes. Each slope corresponds to a selectable LED current level, allowing for fine-tuned control over brightness and contrast.

By combining a linear Delta Sigma modulator with the 16 available LED current levels, we achieve an effective dynamic range equivalent to linear 19 bits.

Deepsky's innovative processing pipeline redefines grayscale management in LED displays.

From video capture to LED dot illumination, experience unprecedented levels of precision and control.

Video input

Connect your sources seamlessly with HDMI, SDI, or SMPTE2110 inputs.

Enjoy hassle-free local playback thanks to embedded FFMPEG.

Experience exceptional color depth and accuracy with up to 12-bit per color and support for Gamma, PQ and HLG transfer functions.

Processing

Pixel values are decoded and processed in 32-bit floating-point format per subpixel, ensuring high precision throughout the pipeline.

For each LED, the processor calculates both its grayscale value and the optimal electrical current using Deepsky's Variable Current technology.

The sophisticated pixel algorithms factor in LED color, efficiency, non-linearity, and real-time temperature data from the integrated sensor within each IC driver.

LED driver

The Deepsky IC driver handles the Digital-to-Analog conversion of LED brightness values. Its Delta Sigma modulator, coupled with 16 selectable LED currents, acts as a non-linear controller, achieving a grayscale equivalent to a 19-bit linear scale.

Additionally, 4 bits of adjustable video frame dithering can be incorporated, providing an unprecedented 23-bit grayscale capability.

Page updated

Report abuse