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Field amplitude temperature compensation circuit of television

A technology of temperature compensation circuit and temperature compensation unit, which is applied in the field of televisions, can solve problems such as geometric distortion and TVs not having temperature compensation functions, and achieve the effect of universal applicability

Inactive Publication Date: 2012-09-05
KONKA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a television field amplitude temperature compensation circuit for the defect that the above-mentioned televisions in the prior art do not have a temperature compensation function and cause geometric distortion when the temperature changes cause a large field amplitude change

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  • Field amplitude temperature compensation circuit of television
  • Field amplitude temperature compensation circuit of television

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Embodiment Construction

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] like figure 1 As shown, the figure shows an embodiment of the television field amplitude temperature compensation circuit of the present invention. The TV field amplitude temperature compensation circuit shown includes an RGB back-end processing chip 1 and a connection between the field high voltage compensation port V-EHT (set on the second pin of the RGB back-end processing chip 1) and the automatic brightness control voltage ABL. A temperature compensation unit 2, the temperature compensation unit 2 is used to change the voltage of the field high voltage...

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Abstract

The invention relates to a field amplitude temperature compensation circuit of a television. The circuit comprises an RGB back-end processing chip and a temperature compensation unit connected between a field high-voltage compensation port V-EHT of the RGB back-end processing chip and an ABL voltage, wherein the temperature compensation unit is used for changing the voltage of the field high-voltage compensation port V-EHT during temperature change to change the field output amplitude therewith. The current television has no temperature compensation function, so geometric distortion is generally caused when the field amplitude change is large due to the temperature change. The field amplitude temperature compensation circuit of the television can achieve the purpose of temperature compensation according to the size of the field amplitude changed along with the temperature change by using the property of the junction voltage of common diodes changed along with the temperature change and changing the number of the diodes; and the circuit makes full use of the function of field EHT, and has universal applicability.

Description

technical field [0001] The invention relates to a television set, and more specifically relates to a television field amplitude temperature compensation circuit. Background technique [0002] At present, TV sets do not have a field amplitude temperature compensation circuit. When the field amplitude changes, it is only to improve the accuracy of components, or use the negative temperature characteristics of ordinary resistors to improve the field amplitude change caused by temperature changes, or increase the heat sink and other simple methods. . After taking these measures, if there are still some changes in the field amplitude, for example, it is acceptable that the test signal of the five circles changes to a small grid in a large grid, but when the device causes a large change in the field amplitude due to temperature changes, If using LV71002 Sanyo's back-end RGB processing and scanning driver solution, the general solution cannot solve the problem of field amplitude v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/68
Inventor 张敬东姚进
Owner KONKA GROUP
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