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System and method for partitioned color, double rate video transfer

A technology of color and word transmission, applied in the direction of using projection device image reproducer, laser parts, phonon exciter, etc., can solve the problem of data and clock rate, etc.

Active Publication Date: 2014-01-22
INTERSIL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alternatively, these 10-bit R, G, and B data words could be sent one by one from the controller 104 to the LDD 108 on the same 10 parallel signal traces, but this would require a 3x speed data and clock rate

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  • System and method for partitioned color, double rate video transfer
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  • System and method for partitioned color, double rate video transfer

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Embodiment Construction

[0034] As described above, the pico projector device 100 may be integrated with a portable device such as a mobile phone. Due to the small size of such portable devices, there is a need to reduce the number of connections between the controller 104 and the LDD 108 to reduce the size and pin count of these two chips. Also, to keep the cost and power consumption of these chips down, data and clock speeds need to be kept low. For a particular example, the problem to be solved may be to send 3x10 bits of video data words from the controller chip 104 to the LDD chip 108 every 10 ns. If a 100MHz clock is used, 30 parallel data pins are required to support this data flow. This necessitates high pin counts for applications such as pico projectors, where a small footprint chip is required to allow the unit to fit into a small space. However, if the data is transmitted sequentially in color order as three 10-bit words, the clock rate has to rise to 300MHz, which is too high for many a...

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Abstract

Systems, methods and devices provide for fast and power efficient transfer of three color data words (e.g., a M-bit red color word, a M bit green color word and a M-bit blue color word) per pixel from a controller to a laser diode driver (LDD). First and second transfer words are produced based on the three color data words. The first transfer word is transferred from the controller to the LDD and stored at LDD in response to a low-to-high portion of a cycle of a data transfer clock, and the second transfer word is transferred and stored in response to a high-to-low portion of a cycle of the data transfer clock. The first, second and third color data words are reproduced by the LDD in dependence on the first and second received transfer words. First, second and third DACs of the LDD are driven with the first color data word, the second color data word, and the third color data word. Three light sources (e.g., red, green and blue laser diodes or LEDs) are driven with output currents of the DACs.

Description

[0001] claim priority [0002] This application claims priority to the following U.S. patent applications: [0003] U.S. patent application entitled "Systems and Methods for Color Blocking, Double Rate Video Transmission (SYSTEMS ANDMETHODS FOR PARTITIONED COLOR, DOUBLE RATE VIDEOTRANSFER)" filed by Alexander Fairgrieve and D.Stuart Smith on July 27, 2010 No. 12 / 844,691 (Docket No. ELAN-01248US1); and [0004] US Patent Application entitled "Systems and Methods for Color Blocking, Double Rate Video Transmission (SYSTEMS ANDMETHODS FOR PARTITIONED COLOR, DOUBLE RATE VIDEOTRANSFER)" filed by Alexander Fairgrieve and D.Stuart Smith on December 29, 2009 No. 61 / 290,861 (Docket ELAN-01248US0), both of which are hereby incorporated by reference. technical field [0005] Embodiments of the invention generally relate to methods, devices and systems for transferring color data words from one component to another, such as from a controller to a laser diode driver circuit. Background ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31H01S5/042
Inventor A·费尔格里弗D·S·史密斯
Owner INTERSIL INC