yo nan lòd yo pèmèt kliyan yo idantifye bon jan kalite a nan pwodwi ekspozisyon dirije, the following nine important items of led display are synthesized from various perspectives. the first eight items are suitable for general led display, while the ninth item is for small spacing led display.
mwen. klète:
maximum brightness refers to the brightness of each primary color of the led display screen at the highest gray level and brightness under a certain ambient illumination. in short, the brightness measured by a light gun in the normal direction when the display screen is set to white 255 by software. pou ekspozisyon deyò dirije, according to the use of the environment, there will be different requirements for maximum brightness, because in the case of strong environmental light, the brightness of the led display is required to be higher, so that people can see clearly the content displayed on the screen. jeneralman pale, the maximum brightness requirement of the display screen is lower when it sits in the south and faces the north. as long as it reaches 4000cd/m2, it can meet the requirement. for the display screen sitting in the north and faces the south, the brightness requirement of the whole screen can reach 7000cd/m2. the requirement of facing east and west is the same as that of facing south, because there will be a part of the time when the sunlight will directly shine on the led display. sou ekran an. nan teyori, brightness requirements greater than 5500cd square meter brightness is enough.
de. color temperature
when we see that the color of the image is different from the material on the display screen, foto nou yo pral seryezman defòme, which is related to the color temperature of the white balance of the led display screen. if the human eye watches the display screen directly, the color temperature of the white balance will be between 6500 and 8000k, which is suitable for tv broadcasting stations. on the display screen, the actual color temperature of the screen needs to be adjusted to about 5500 k, Se konsa, foto a sou ekran an ekspozisyon se reyèl apre anrejistreman ak difize pa kamera a.
3. to rafrechi
to rafrechir la refere a kantite fwa enfòmasyon sou ekspozisyon an siy ekran dirije parèt nan plen chak dezyèm. lè frekans renouvèlman an twò ba, je imen an ap jite lè l ap gade ekspozisyon dirije a. anjeneral lè nou sèvi ak kamera a tire, nou pral wè liy lan optik. anjeneral frekans frekans nan je imen an pi plis pase 300 HZ, sa vle di, to rafrechisman an se sèlman plis pase 300 HZ, pa gen okenn sans de jitter lè gade ekran an ekspozisyon ki ap dirije nan je a toutouni. si kamera a itilize pou tire, dapre anviwònman yo diferan nan kamera diferan, egzijans minimòm lan pi plis pase 600 HZ kapte liy lan optik. segondè rafrechir ka amelyore klète ak koulè fidelite ekran an. li ka detekte avèk yon kamera dijital. si li rafrechi wo, foto kamera a pran li trè klè, pa gen okenn flokon ak liy analysis. endikatè sa a enpòtan sitou lè lwe ekran ak emisyon televizyon.