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3D LED display screen

An LED display, 3DLED technology, applied in optics, instruments, optical components, etc., can solve problems such as crosstalk, light leakage, accompanying shadow, etc., and achieve the effect of eliminating dispersion, improving contrast, and realizing equal phase delay.

Active Publication Date: 2015-05-27
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a one-to-one relationship between the phase retardation of the light wave of the wave plate used to make the LED screen realize the 3D display effect and the wavelength of the light, and the polarized light of the three wavelengths of red light, green light and blue light passes through this ordinary 1 / 4 The phase retardation behind the wave plate is different, and the outgoing light of the three primary colors is circularly polarized or elliptically polarized, so there will be chromatic aberration, resulting in 3D display defects such as light leakage, accompanying shadows, or crosstalk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 It is a schematic structural diagram of the 3D LED display screen that can realize the equi-phase function in this embodiment. The 3D LED display screen with equal phase function mainly includes an LED display screen, a layer of polarizing film and an equal phase retarder; the LED screen is composed of an array of LED lamp beads; the polarizing film can be a left polarizing film or a right polarizing film, and is arranged in front of the LED screen; the equal phase retarder is composed of two antiparallel rubbing liquid crystal cells, and is arranged in front of the polarizing film. Both the LED display screen and the polarizing film can be obtained commercially. The phase retardation of light of different wavelengths after passing through the equal phase retarder is equal and the value of the phase retardation is π / 2. The preparation method of the equal phase retarder is as follows:

[0024] Take 8 pieces of ITO glass, do orientation treatment, pre-tilt angl...

Embodiment 2

[0030] figure 1 It is a schematic structural diagram of the 3D LED display screen that can realize the equi-phase function in this embodiment. The 3D LED display screen with equal phase function mainly includes an LED display screen, a layer of polarizing film and an equal phase retarder; the LED screen is composed of an array of LED lamp beads; the polarizing film can be a left polarizing film or a right polarizing film, and is arranged in front of the LED screen; the equal phase retarder is composed of two antiparallel rubbing liquid crystal cells, and is arranged in front of the polarizing film. Both the LED display screen and the polarizing film can be obtained commercially. The phase retardation of light of different wavelengths after passing through the equal phase retarder is equal and the value of the phase retardation is π / 2. The preparation method of the equal phase retarder is as follows:

[0031] Take 8 pieces of ITO glass, do orientation treatment, pre-tilt angl...

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Abstract

The invention provides a 3D LED display screen. The 3D LED display screen comprises an LED display screen body, polarizing film and an equal-phase delay sheet. The equal-phase delay sheet comprises a birefringence material layer A and a birefringence material layer B which are stacked. For light with wavelengths being lambda 1 and lambda 2, the thickness dA of the birefringence material layer A and the thickness dB of the birefringence material layer B meet: (img file= ' DDA000417413020000011. TIF' wi= '576' he = '152' / ) ( / maths), and the e axis directions of the birefringence material layer A and the birefringence material layer B are vertical. Phase delays of light of different wavelengths after passing through the equal-phase delay sheet are identical, and the phase delay values are pi / 2. The polarizing film is disposed between the equal-phase delay sheet and the LED display screen body. By means of the LED display screen, dispersion can be eliminated, and accordingly, 3D display defects such as light leak, shadow or crosstalk are prevented, and the display effect is good.

Description

technical field [0001] The invention relates to a 3D LED display screen, in particular to a 3D LED display screen with an equal-phase function. Background technique [0002] LED screen is a new imaging electronic device made of light-emitting diodes arranged in sequence. It has the characteristics of high brightness, wide viewing angle, and long life. It is widely used in TV screens, outdoor advertising screens and other products. Compared with ordinary 3D screens, 3D LED screens have higher brightness, more vivid colors, larger viewing angles, and higher product added value. In the patent CN102750881A, after covering a layer of polarization conversion film on the surface of an ordinary LED screen, a layer of reflective polarizing film is covered to realize a 3D LED display screen that can enhance the polarized light effect. The reflective polarizing film in this patent is a special 1 / 4 wave plate, so the polarizing film and 1 / 4 wave plate are alternately covered on the sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/33G02B27/26G02B30/25
CPCG02B30/25G09F9/33
Inventor 钱皓董坤
Owner JIANGSU HECHENG DISPLAY TECHCO