Automatic volume restrict in color TV and device of providing truly accompanying sound only

A sound and volume technology, applied in the field of TV, can solve the problems of low sound, distortion of sound, and burning speakers.

Inactive Publication Date: 2004-10-27
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the manufacturer sets the maximum distortion power at 70% of the original adjustment, then it is possible to encounter a channel with a low sound, even if the adjustment is increased to 100%, the sound is still extremely low, which cannot meet t...

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  • Automatic volume restrict in color TV and device of providing truly accompanying sound only
  • Automatic volume restrict in color TV and device of providing truly accompanying sound only
  • Automatic volume restrict in color TV and device of providing truly accompanying sound only

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Embodiment Construction

[0007] The best way to realize this innovation will be described in detail below in conjunction with the accompanying drawings. It is no longer necessary to repeat what has been mentioned above or in combination with the existing technology or should be changed in the same way.

[0008] As shown in Figure 2, relay KA2 or thyristor or thyristor SCR and its associated circuits can be selected. If the relay KA2 and its related circuits are selected, it has versatility, strong overload resistance and high reliability, but the price is slightly more expensive. It is cheaper to use thyristor SCR and its related circuits. However, the circuit requires: it is better to have a circuit that cuts the bright spot on / off and prevents the impact sound of on / off, slows down the moment of standby switching so as not to make the AVCC of the audio power amplifier power drop rapidly, and also requires the use of prolonging the moment of standby to still make the line trace It is better to ente...

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PUM

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Abstract

In the invention, the switch regulated power supply runs at three modes: in normal operation, stand by, and as power source of truly accompanying sound only. The invention features energy saving, compact, reliable, avoiding distortion of accompanying sound and protecting loud speaker and power amplifier of accompanying sound.

Description

Technical field [0001] The invention mainly relates to the field of television technology. Background technique [0002] During the so-called "screen saver" or "listening alone" of the prior art, field scanning, decoding circuit and kinescope circuit are still working. Only turn down the contrast and brightness to the minimum. Power consumption has not slowed down significantly. What is even more harmful is: when the ultra-high voltage of the line output stage is in the screen saver or alone, it will rise to the maximum value, and it is easier to absorb moisture and cause high-voltage ignition failure. [Although "listening alone" for a long time can cut off the line output stage, the advantage of less power consumption. However, due to the excessive light load or no load of the power supply in most normal working states, the frequency rises and serious heating occurs. The power supply is easily damaged and unfavorable to the picture tube, unless a new "listening alone" p...

Claims

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Application Information

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IPC IPC(8): H04N5/00H04N5/60H04N5/63
Inventor 戴俊
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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