pulse forward current
LED display classification
(1 ) according to the word score: stroke display word high minimum 1mm ( monolithic integrated a number of digital control words high generally in 2 ~ 3mm). Other types of stroke display up to 12.7mm ( 0.5 inches ) or even hundreds of mm.
( 2) according to the color red, orange, yellow, green and several kinds of.
( 3) according to the structure, a reflection cover, a seven section type and monolithic integrated.
(4 ) from the light emitting section of electrode connection with common anode and cathode two.
LED display parameters
Because the LED display is the basis for the LED, so its optical, electrical characteristics and the ultimate meaning of the parameters most with light emitting diodes of the same. But because the LED display includes a plurality of light emitting diodes,dvb t tuners so has the following special parameter:
1 luminous intensity ratio
Due to the digital tube sections in the same driving voltage, the current is not the same, so each luminous intensity of different. All segments of the luminous intensity values of maximum value and the minimum value of the ratio of luminous intensity ratio. Ratio can be 1.5 ~ 2.3, can not exceed the maximum of 2.5.
2 pulse forward current
If the stroke display each typical DC forward current of IF, the pulse can be much larger than the IF, forward current. Pulse duty ratio is smaller, pulse forward current can be more.
Plasma monitor In the last few years PDP (Plasma Display Panel, plasma monitor) has used the plasma plane screen technology new generation graphic display device which develops high speed. Image formation principle
The plasma display technology's image formation principle is arranges over a thousand seals on the display monitor the small low pressure gas compartments, causes it through the electric current stimulation to send out the ultraviolet ray which the naked eye cannot see,dvb t receivers then the ultraviolet ray strikes against on the following glass red, green, the blue 3 color self-luminescent material to send out the visible light which the naked eye can see, by this image formation.
Plasma monitor's superiority: Thickness is thin, the resolution high, takes the space to be few, and may take in family's wall hanging television use, has represented the future computer monitor's trend of development.
Plasma monitor's characteristic: 1. brightness, high contrast gradient The plasma monitor has the high luminance and the high contrast gradient, the contrast gradient achieves 500; 1st, completes can meet the eye need; Brightness is also very high, therefore its color reducibility is good.
2. the pure plane image does not have the distortion The plasma monitor's RGB illumination grid assumes the uniform distribution in the plane, like this causes the image, even if also does not have the distortion phenomenon occurrence in the edge. But in the pure even CRT monitor, because is non-uniform in the edge scanning velocity, very rambunctious to not distorted level.
3. be ultra-thin design, ultra wide angle of view As a result of the plasma technology display principle's relations,cable suppliercause its complete machine thickness to be lower than traditional greatly the CRT monitor, compares the difference with LCD not to be also big, moreover can the multiposition impositions. The user may act according to likes personally, hangs the plasma monitor on the wall or suspends on the table, has saved the room greatly, and neat, artistic is also fashionable.
4. has the complete input connection For coordinate connection each kind of supply oscillator, the plasma monitor has had the DVD component connection, the standard VGA/SVGA connection, the S post, the HDTV component connection (Y, Pr, Pb) and so on, may receive the power source, VCD, DVD, HDTV and the computer and so on each kind of signal output.
5. the environmental protection does not have the radiation The plasma monitor has used the good electromagnetic screen measure generally in the structural design, its screen pretage environment can also have the electromagnetic screen and preventInfrared radiation's function, does not have the injury nearly to the eye, has the good environment characteristic.