Picture regulator for picture apparatus and its method
A technology of image equipment and adjustment method, applied in image communication, parts of color TV, parts of TV system, etc., can solve the problems of lowering combined image quality, lowering work efficiency, brightness deviation, etc., to prevent entering an infinite loop , The effect of reducing the adjustment failure rate and reducing the adjustment time
Inactive Publication Date: 2007-07-18
NANJING LG TONGCHUANG COLOR DISPLAYS SYST CO LTD
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Problems solved by technology
[0013] First, because the offset and gain are changed in tandem, even if the offset adjustment is completed, if the gain value changes, each combination will have a deviation because the offset adjustment value does not work properly
[0014] That is, when the gain adjustment value is changed, it is possible to confirm the deviation of the adjustment offset migration, in this case, because the offset adjustment value cannot be set normally, the brightness deviation occurs for each combination
[0015] Second, when the brightness deviation is serious, there is a problem of seriously reducing the combined image quality
[0016] Third, in the production process of adjusting offset and gain, if the signal strength is weak or the characteristics of a single analog digital IC are poor, there is a fear of entering an infinite loop
In this case, because the process of adjusting offset and gain will waste a considerable amount of time, it will greatly reduce work efficiency
Method used
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[0034] Referring to the accompanying drawings, the correct embodiments of the picture adjustment device and method of the image equipment of the present invention are described as follows:
[0035] As shown in FIG. 2, first, in order to convert the input analog image signal into an A / D conversion unit (10) of a digital value; the digital image signal converted by the A / D conversion unit (10) is processed into a signal that can be output The image processing unit (20) of the image processing unit (20); the (1) storage unit (30) for storing the digital data processed by the image processing unit (20); the first (1) storage unit (30) for storing the offset and gain adjustment values of the A / D conversion unit (10) (2) a storage part (50); adjust the offset and gain of the above-mentioned A / D conversion part (10) in turn, if the digital data gain value stored in the above-mentioned (1) storage part (30) is within the setting range, The above-mentioned offset and gain adjustment ...
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The invention in use for adjusting deflection and gain of A / D conversion part caused by deflection of IC product includes following steps: (1) adjusting deflection of A / D conversion part to determine whether the deflection adjustment value satisfies target range or not; (2) if yes, adjusting gain of A / D conversion part to determine whether the gain adjustment value satisfies setting range or not; if not, stopping the said gain adjustment, and readjusting deflection. Thus, the invention adjusts deflection first, and then adjusts gain. In procedure of adjusting gain, if gain value is out of the setting range, then deflection adjustment is carried out again. The invention reduces failure rate and time of adjustment greatly.
Description
technical field [0001] The present invention relates to an image device, in particular to an image device screen adjustment device and a method for adjusting the offset and gain of an analog-digital conversion unit in consideration of product IC variations in the production process. Background technique [0002] Generally, an image device such as a digital TV performs digital processing on the input signal and inputs it to the image processor. [0003] At this time, the process of digitally processing the analog image is very important, and the same digital value must always be output for a certain level of input. [0004] However, because of the unique characteristics of ICs, the image device has an internal small error for the same input. [0005] Therefore, in order to minimize this error, a process of adjusting the offset and gain of the analog-to-digital conversion section is required before the product is shipped. [0006] The picture adjustment method of traditional...
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IPC IPC(8): H04N5/14G09G5/36
Inventor 李东翼
Owner NANJING LG TONGCHUANG COLOR DISPLAYS SYST CO LTD