quot;Five tricks" from the projector color cast failure
Projector color cast because
With projection technology continues to mature in the hands of users Projector “Shadow” is mainly LCD projector and digital projector. However, when using this type of projector, projection color cast often encounter the problem, leading to a decline in projection effects. So why do failures occur Projector color cast, we encounter such a failure, how quickly to respond? Believe that the contents of this article below will give you a satisfactory answer!
Projection color cast because
Normal circumstances, the LCD projector through the internal optical processing system, will be light, “decompose” into the red, green and blue color beams of light, the three color light beam after transmission, respectively, AD conversion, modulation and other processes , appears in the three liquid crystal panel, and then through the optical path control unit, to achieve the normal color of light off the last three color light beam projection prism of the synthesis, the formation of color image output through the projector lens on the projector screen. And DLP digital projectors through on red, green and blue color wheel technology to the color of the projection image processing, the projection degree of color fidelity DMD micromirror projector is closely related to the number of how many. If the deal through the projector optical system, the output of.
Three-color projection light in a certain one or a few colors, then the image appears on the screen will appear obvious color cast failure. Obviously, the main reason for the color offset caused by projection, the projector is the internal optical processing system, by “external” interference, you can not correct the image color processing, and “express”, but of course there’s “external force” includes a number of factors , caused by different factors in the projection of color cast need a different approach to solve.
Projection color cast of the actual
Units have a Hitachi projector, its “service” time for nearly two and a half faster. Most recently, do not know why, through the projector screen projector images out of total sensory obvious color cast phenomenon. At first I also thought Cause of being cold, and do not mind this phenomenon, but in the days after the projection, projection fault still can not remove color cast, it is clear that the projector is really ill,. In desperation I decided to look at the projector for a thorough examination.
I first connect the projector and computer lines were checked and found that with the projector connected to the computer is a Celeron 733 desktop Founder, will be to connect the projector and the computer’s VGA cable Internal and mixing took place, leading to a serious projection signal crosstalk phenomenon? first anyway, or the first VGA interface cable at both ends removed to see! was the author of a did and quickly got multimeter, apart VGA cable on both sides of the interface, and which signal lines of each were examined, the results did not find the signal wire hinge, broken and shorted such failure.
Projector or to verify whether the fault signal line, the author also used with a VGA cable to the projector and another computer connected again switched on, they found the projector on the projection screen output Not only no color cast screen phenomenon, and results seem very clear, very clear VGA data projector line with the Okanagan is normal, the problem is most likely connected to the projector that previously caused the computer platform Founder. So the author of the computer that sets Founder checked to see if the computer’s display resolution parameters, whether the projector within the support; when I open the Display Properties settings Founder Computer window, find the computer’s “color” parameter is set to 16 colors Color “display resolution” parameter is set to become the “800×600″, “Refresh resolution” parameter is set to 75Hz; each of these parameters with the relevant technical indicators projector comparison, the Founder computer projectors found support for all display parameters, indicating that failure is not a projection color cast caused by the Founder computer itself!
A result of these efforts made a preliminary analysis of something like this: VGA cable and the projector itself is normal to connect the projector is normal Founder computers, projection display parameter settings are correct.
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