Aicmiú agus pointí eolais backlight LCD

Aicmiú agus pointí eolais na bpainéal backlight LCD

Is comhpháirteanna optúla iad backlights a sholáthraíonn foinse solais backside i dtáirgí taispeána LCD. Toisc nach bhfuil airíonna astaithe solais ag an ghloine leachtchriostail féin, cuirfear foinse astaithe solais, is é sin, painéal backlight, taobh thiar den ghloine leachtchriostail de réir mar is gá. Clúdaíonn an raon iarratais leighis, áilleacht, ionstraimíocht, trealamh feithicle, trealamh tionsclaíoch, críochfoirt bhainc, uathoibriú oifige, cumarsáid, bréagáin leictreonacha agus táirgí tomhaltóra.

Prionsabal oibre an phainéil backlight:

Is é prionsabal oibre an backlight LED ná foinse solais pointe (LED) a thiontú ina fhoinse solais dromchla (backlight, backlight)

Aicmiú boird backlight:

Faoi láthair, tá trí chineál painéil backlight go príomha: EL, CCFL agus LED de réir an cineál foinse solais. De réir suíomh dáileadh na foinse solais, roinntear iad i gcineál imeall agus cineál díreach (cineál backlight bun).

Seo réamhrá gairid dóibh:

◆Edge-light type: A backlight plate made by placing a linear or point light source on the side of a specially designed light guide plate. According to the needs of actual use, it can be made into a bilateral type or even a trilateral type. The edge light type backlight can generally be made very thin, but the light utilization rate of the light source is small, and the thinner the light source, the smaller the utilization rate, about 50 percent . The core of its technology is the design and production of light guide plates. Edge light type commonly used LED backlight and CCFL backlight.

◆LED light backlight: LED light is also called light-emitting diode. Compared with other light sources, the power consumption of a single LED light is very small. From blue to red, LED lights have many colors, commonly used such as "Table 1" and "Table 2"; another special color is white, and "Table 3" gives its commonly used chromaticity range. In various colors, it can be roughly divided into two types: high light and low light: basically, "Table 1" belongs to low light (although amber, orange and red also have slightly high light), "Table 1" belongs to low light 2" and "Table 3" are highlighted.

Since white is a mixed color and has no identifiable wavelength value, it is represented by its coordinate value on the chromaticity diagram. We customize it as "Cool White" and "Warm White". In all kinds of colors, there is a problem of color deviation, among which blue and white are more obvious, especially white, and now LED suppliers cannot effectively control it.

◆CCFL backlight: The great advantage of this type of backlight is high brightness, so it is basically used in black and white negative phase, blue mode negative phase and color liquid crystal display devices with large area. In theory, it can make various colors according to the color matching principle of three primary colors. The disadvantage is that the power consumption is large, it needs to be driven by an inverter circuit, and the operating temperature is narrow, which is between 060 degrees, while other backlight boards such as LED can reach -2070 degrees.

Cineál backlight bun: Is foinse solais dromchla cothrom é le struchtúr áirithe. Is féidir é a bheith ina fhoinse solais dromchla leanúnach agus aonfhoirmeach, mar shampla lampa fluaraiseacha EL nó árasán; is féidir é a bheith comhdhéanta freisin de go leor foinsí solais pointe, mar shampla ponc maitrís LED nó lampa gealbhruthach. Painéil backlight, etc. Is minic a úsáidtear ponc maitrís LED agus backlight EL.

◆ EL backlight: that is, electroluminescence, which is a cold light source that emits light by the intrinsic luminescence of phosphors excited by an alternating electric field. Its great advantage is that it is thin, and it can achieve a thickness of 0.20.6mm. The disadvantage is that the brightness is low, the life is short (usually 30005000 hours), it needs to be driven by inverter, and there will be flickering, noise and other defects due to the interference of the circuit. There are two types of EL drivers: inverter and Driver IC driver.

Toisc nach féidir le minicíocht agus le voltas aschuir ualaigh an Tiománaí reatha IC na coinníollacha tipiciúla EL (400Hz, AC100V) a bhaint amach, tá an gile níos ísle ná an tiomáint inverter. Le déanaí, tá painéil backlight solas bán (dath iomlán) EL agus LCD tar éis teacht amach ceann i ndiaidh a chéile freisin. Mar gheall ar an gile níos dorcha, áfach, úsáidtear é go bunúsach le haghaidh taispeántais criostail leachta beaga faoi bhun 4 orlach. Mar shampla: fóin phóca, PDAs, consóil cluiche, srl. Painéil chúl-sholais gile lánmhéide, dath iomlán (solas bán), agus anois tá an príomhshrutha fós ag baint úsáide as CCFL mar fhoinse solais.

◆LED bottom backlight: The advantages are good brightness and good uniformity. The disadvantage is that the thickness is large (greater than 4.0mm), the number of LEDs used is large, and the heating phenomenon is obvious. Generally, low-bright colors are used for design, and high-bright colors are basically ignored due to the high cost.