An on-screen display controller or on-screen display circuit (OSDC or OSD Controller) or just OSD is a digital circuit that provides the functionality needed to create on-screen displays - i.e. a circuit that allows text and low-level graphics to be superimposed onto a TV screen (on top of normal video signal). OSD circuitry is found as discrete chips, built-into some microcontrollers, and most recently incorporated into the main graphics processor.

Typical features

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Architecture

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OSD Chips

• Mitsubishi M350xx
• Motorola MC1415xx
• Myson Technology MTV
• Philips SAA56xx (TV MCUs + OSD)
• Philips PCA85xx
• Sanyo LC863
• Sanyo LC747
• Samsung 25xx
• SGS-Tompson STV94xx
• NEC μPD64xx

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