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Backlight unit and display device comprising same

A backlight unit, a single technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as poor uniformity of light emission and thick thickness

Pending Publication Date: 2017-12-01
NANJING TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present application is to provide a backlight unit and a display device including the same, so as to solve the problems of thick thickness and poor luminous uniformity of direct-lit backlight units in the prior art

Method used

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  • Backlight unit and display device comprising same
  • Backlight unit and display device comprising same
  • Backlight unit and display device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 2 As shown, the backlight unit includes a substrate 6 (with an area of ​​70cm*40cm), a wavelength conversion film 4, and a cup body; the cup body is formed by extending the edge of the substrate 6 toward the direction of the wavelength conversion film 4, and has an opening. The section is an isosceles inverted trapezoid (base angle 135 degrees), the cup has an opening, side walls and a substrate 6, and the side walls of the cup and the inner surface of the substrate 6 are provided with a reflective film ( figure 2 Not shown in ) substrate 6 has a plurality of groove portions ( figure 2 not shown), the backlight unit also includes a micro LED chip array, the micro LED chip array such as figure 1 as shown ( figure 1 It is only a schematic diagram, and the actual number of micro-LED chips is not shown), the micro-LED chip array includes a plurality of micro-LED chips 1 arranged in a matrix, and the micro-LED chip array includes 2660 rows*7000 micro-LED ...

Embodiment 2

[0055] Such as Figure 4 As shown, the backlight unit includes a substrate 6 (with an area of ​​15cm*8cm), a wavelength conversion film 4, and the substrate 6 has a plurality of grooves ( Figure 4 not shown), the backlight unit also includes a micro LED chip array, the micro LED chip array such as figure 1 as shown ( figure 1 It is only a schematic diagram, and the actual number of micro-LED chips is not shown), the micro-LED chip array includes a plurality of micro-LED chips 1 arranged in a matrix, and the micro-LED chip array includes 1000 rows*800 micro-LED chips, in the form of a cuboid shape, its length*width*height is 0.05mm*0.1mm*0.05mm, the luminous wavelength range of the micro LED chip 1 is 440-465nm; the distance between each micro LED chip 1 in the length and width direction is 0.05mm, And it has an independent control circuit; the distribution density of micro LED chips 1 is 6666 per square centimeter, and they are embedded in the groove part of the substrate. ...

Embodiment 3

[0058] The micro-LED chip array includes 250 rows*266 columns of micro-LED chips 1, which are in the shape of a cuboid, and its length*width*height is 0.1mm*0.4mm*0.1mm. The distribution density of chip 1 is 554 pieces / square centimeter, and the others are the same as in embodiment 2.

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Abstract

The invention provides a backlight unit and a display device comprising the same. The backlight unit comprises a substrate, a wavelength conversion film and a miniature LED (light-emitting diode) chip array, the wavelength conversion film comprises a phosphor and is arranged on the substrate, the miniature LED chip array comprises a plurality of miniature LED chips, and the cross section area of each miniature LED chip is smaller than or equal to 1mm<2>. According to the backlight unit, the cross section area of miniature LED chip array is small, more LED chips can be arranged in the same substrate area, so that the brightness of a backlight component is high and uniformly dispersed, the miniature LED chip array is thin, secondary lens dispensing is omitted, the whole thickness of the direct-type backlight unit can be reduced, the miniature LED chips have lower driving current, less electric energy is converted into heat energy, energy is saved, less heat is generated, and the service life of the backlight unit can be prolonged.

Description

technical field [0001] The present application relates to the display field, in particular, to a backlight unit and a display device including the same. Background technique [0002] Traditional direct-lit backlights are equipped with multiple LED chips of common sizes on the unit substrate. Due to the light-emitting characteristics of the LED chips themselves, light needs to be redistributed through lenses to be applied to the display unit. However, due to the limitation of the light mixing distance of the lens (according to the current technology, the distance can be up to 12mm, it is difficult to continue to reduce), the thickness of the traditional direct-type unit is relatively large, which does not meet the mainstream needs of the current market. It is generally used in large-scale displays and cannot be used. in small displays. Although the traditional edge-lit backlight can be used in small displays, it cannot achieve ultra-high brightness due to structural limitati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
CPCG02F1/133603G02F1/133614
Inventor 尹侠赵飞
Owner NANJING TECH CORP LTD
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