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Transparent display capable of increasing contrast ratio

A technology of transparent display and contrast, applied in the direction of instruments, lighting devices, electric solid devices, etc., can solve the problem of light intensity reduction, etc., and achieve the effect of high contrast, good display effect and high transmittance

Inactive Publication Date: 2009-08-19
KUNSHAN VISIONOX DISPLAY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, it will also reduce the intensity of the light emitted from the device, that is, the light generated by the display itself by half.

Method used

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  • Transparent display capable of increasing contrast ratio
  • Transparent display capable of increasing contrast ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] refer to figure 1 . The display of this embodiment includes a glass substrate 1, a first electrode 2, an organic light-emitting component 3, and a second electrode 4 that are adjacent in sequence, and also includes a semi-reflective and semi-transmissive cholesteric coating on the other side of the second electrode 4. The liquid crystal layer 5 can be cured by ultraviolet irradiation or heating. The cholesteric liquid crystal layer 5 has specific optical properties according to the arrangement of helical molecules, and the light incident parallel to the helical axis, in the wavelength corresponding to the pitch of the helix, corresponds to The rotation direction of the spiral, the circularly polarized light component of one rotation direction is reflected, and the other is transmitted; natural light can be regarded as a superposition of left-handed circularly polarized light and right-handed circularly polarized light, so the cholesteric liquid crystal layer 5 pairs of ...

Embodiment 2

[0016] This embodiment adopts figure 1 The structure, the display screen is used for mosaic use such as mobile phones and computers. Since the back of the display screen is embedded in the casing, it is equivalent to adding a light-absorbing layer behind the cholesteric liquid crystal layer 5 . Assuming that the intensity of ambient light is 20nit, the self-luminous brightness of an ordinary organic EL display with a reflective cathode is 200nit when it is working, the brightness of an ordinary organic EL display with a reflective cathode is 20nit when it is not working, and the brightness when it is working is 200nit. for:

[0017] (The self-luminous luminance of an ordinary organic EL display with a reflective cathode + the intensity of ambient light when it is working): the brightness of an ordinary organic EL display with a reflective cathode when it is not working

[0018] =(200+20):20

[0019] =11:1;

[0020] The brightness of the display screen in this embodiment wh...

Embodiment 3

[0034] This embodiment adopts figure 1 The structure is used for non-mosaic display, and both sides of the display are exposed, which is suitable for occasions that require both display and transparency, such as car windows. The two sides of the display in this embodiment are respectively the viewing side of the display and the outside of the display. Assuming that the intensity of the ambient light is 20nit, the self-luminous brightness of the ordinary organic EL transparent display is 200nit when it is working, and the brightness when it is not working is 20nit. The brightness of the display when it is working is:

[0035] The self-luminous brightness of ordinary organic EL transparent display + the intensity of ambient light when it is working

[0036] =200+20

[0037] =220nit,

[0038] The contrast is:

[0039] Brightness when the monitor is working: Brightness when the monitor is not working

[0040] =220:20

[0041] =11:1;

[0042] The light intensity transmitted ...

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Abstract

The invention discloses a transparent display capable of increasing contrast, which comprises a transparent display and at least one semi-reflective and semi-transmissive film arranged on one side thereof. The invention utilizes the feature that the semi-reflective and semi-transmissive film only reflects half of the light of a certain wavelength, and controls the wavelength of the reflected light by adjusting the pitch of its helix, so that the reflected light matches the wavelength of the light emitted by the device. , to get more reflection; in addition, it still has a high transmittance relative to natural light. The light output intensity of one side of the invention is significantly higher than that of the other side, the contrast ratio is high, and the display effect is good.

Description

technical field [0001] The invention relates to a display, in particular to a transparent display capable of increasing contrast. Background technique [0002] Three new display technologies emerging in recent years: plasma display, field emission display and organic electroluminescent display (OLED), all make up for the shortcomings of cathode ray tube and liquid crystal display to a certain extent. Among them, the organic electroluminescent display has a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, and rich colors. Compared with liquid crystal displays, OLED does not require a backlight source, has a large viewing angle, and low power. The speed can reach 1,000 times that of liquid crystal displays, but the manufacturing cost is lower than that of liquid crystal displays with the same resolution. Therefore, organic electroluminescent displays are bound to have broad application prospects. [0003] Ordinary OLED dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/50H05B33/22G09F9/30
Inventor 邱勇刘嵩高裕弟
Owner KUNSHAN VISIONOX DISPLAY TECH