Backlight plate provided with tandem LED components, manufacturing method and display provided with backlight plate

Abstract

The invention discloses a backlight plate provided with tandem light emitting diode (LED) components, a manufacturing method of the backlight plate, and a display provided with the backlight plate. The backlight plate comprises a power supply device, the tandem LED components and a liquid crystal module, wherein the power supply device supplies energy to at least two strings of tandem LED components parallel with each other and the liquid crystal module which serves as a backlight source; the tandem LED components consist of enough LEDs connected in series; and the supply voltage needed by each string of the LEDs is close to the multiplication product of the average voltage and the number of the LED, thereby greatly solving the problem of different forward voltage needed by each LED, and reducing the screening cost of the LEDs. The backlight plate further can comprise a light homogenizing device, wherein a front reflecting piece is arranged between a light homogenizing sheet and the tandem LED components; a back reflecting piece is arranged at a position far away from the light homogenizing sheet side; and the two reflecting pieces repeatedly project and homogenize the light emitted by the tandem LED components, thereby achieving the effects of reducing the manufacturing cost and improving the product yield.

Description

【Technical field】 [0001] The invention relates to a backlight panel, especially an LED backlight panel and a display with the backlight panel, which reduce screening conditions and costs by connecting a large number of light-emitting diode (hereinafter referred to as LED) components in series. 【Background technique】 [0002] The application fields of LED are gradually widening, and it has been gradually accepted as the mainstream in the field of backlight and display, but limited by the insufficient brightness of individual LEDs, so common such as figure 1 As shown, several LED elements 10 are connected in series and driven by a single DC power supply 12 as, for example, a backlight source for a notebook computer. The biggest advantage of this technology of connecting multiple LEDs in series is that it simplifies the driving device of the LED, and can use a larger voltage and a smaller current to provide enough electric power to drive multiple LEDs. The cost of the power sup...

AI Technical Summary

Problems solved by technology

[0012] 1. The efficiency of power supply is low: because the electric energy exceeding the actual demand cannot correspond to drive the LED components to emit higher brightness light, so when the actual light emission is equal to the serial LED components classified according to the voltage in the previous example, the previous classification method will only It needs to consume about 87% of the electric energy of this method;

[0013] 2. Using the combination of a current source with a fixed output current and a power supply with a higher voltage deliberately applied, according to the above calculation, in order to drive 100 strings of LEDs, a display must provide 100 current sources Is with high voltage resistance, and the manufacturing cost will be reduced. increase;

[0014] 3. If the backlight panel is composed of RGB three-color chips, the number and cost of high-voltage current sources need to be increased by three times

Images