CN215494432U - Ultra-high contrast liquid crystal display screen - Google Patents
Ultra-high contrast liquid crystal display screen Download PDFInfo
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- CN215494432U CN215494432U CN202122053620.XU CN202122053620U CN215494432U CN 215494432 U CN215494432 U CN 215494432U CN 202122053620 U CN202122053620 U CN 202122053620U CN 215494432 U CN215494432 U CN 215494432U
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Abstract
The application provides a super high contrast liquid crystal display, include: a first liquid crystal display screen which is colored or black and white; the second black and white liquid crystal display screen is superposed on the first liquid crystal display screen, so that after the first liquid crystal display screen and the second liquid crystal display screen are superposed, each pixel point of the first liquid crystal display screen and each pixel point of the second liquid crystal display screen are completely superposed in the projection direction; and a driving circuit for controlling the first liquid crystal display screen and the second liquid crystal display screen to work synchronously. The ultrahigh-contrast liquid crystal display screen adopts the first liquid crystal display screen and the second liquid crystal display screen which are overlapped together and all the pixel points are completely overlapped in the projection direction, and the contrast of the ultrahigh-contrast liquid crystal display screen is improved by synchronously controlling the change of the corresponding pixel points between a fully-opened state, an opened state or a closed state.
Description
Technical Field
The utility model relates to the field of liquid crystal display screen manufacturing, in particular to an ultrahigh-contrast liquid crystal display screen.
Background
The contrast ratio of the current liquid crystal display (e.g. lcd tv, etc.) is generally about 800: 1, up to about 1500: 1. this is because when light passes through the liquid crystal layer of the liquid crystal display, it cannot be completely turned off to form a pure black picture in the case of a dark picture. Therefore, the existing liquid crystal display cannot meet the requirements of high depth of field and 3D visual application effect.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the prior art, the present invention provides an ultra-high contrast liquid crystal display panel, comprising:
a first liquid crystal display screen which is colored or black and white;
the second black and white liquid crystal display screen is superposed on the first liquid crystal display screen, so that after the first liquid crystal display screen and the second liquid crystal display screen are superposed, each pixel point of the first liquid crystal display screen and each pixel point of the second liquid crystal display screen are completely superposed in the projection direction; and
and the driving circuit controls the first liquid crystal display screen and the second liquid crystal display screen to work synchronously.
In some embodiments of the present invention, the polarizer on the side of the first liquid crystal display panel and the second liquid crystal display panel facing each other is removed.
In some embodiments of the present invention, the first liquid crystal display panel includes a first glass substrate layer, a first TFT layer, a first liquid crystal material layer, a color film layer or a black-and-white monochromatic film layer, a second glass substrate layer, and a first polarizer, which are stacked from bottom to top.
In some embodiments of the present invention, the second liquid crystal display panel includes a second polarizer, a third glass substrate layer, a second TFT layer, a second liquid crystal material layer, a black-and-white monochromatic film layer, and a fourth glass substrate layer stacked from bottom to top.
In some embodiments of the present invention, the first glass substrate layer is integrally formed with the fourth glass substrate layer.
In some embodiments of the present invention, the first glass substrate layer is integrally formed with the fourth glass substrate layer.
In some embodiments of the present invention, the absorption axis direction of the first polarizer is parallel or perpendicular to the absorption axis direction of the second polarizer.
In some embodiments of the present invention, the first TFT layer and the second TFT layer each include a semiconductor switching device for controlling the operation of a single pixel.
In some embodiments of the present invention, the semiconductor switching device is composed of a pixel electrode, a semiconductor switch, and a storage capacitor.
In some embodiments of the present invention, the size, the number, and the arrangement position of each pixel of the first liquid crystal display and the second liquid crystal display are completely the same.
The ultrahigh-contrast liquid crystal display screen adopts the first liquid crystal display screen and the second liquid crystal display screen which are overlapped together and all the pixel points are completely overlapped in the projection direction, and the contrast of the composite liquid crystal display screen is improved by synchronously controlling the change of the corresponding pixel points between a fully-opened state, an opened state or a closed state, so that the ultrahigh-contrast liquid crystal display screen is formed. When corresponding pixel points (completely coincident pixel points in the projection direction) in the first liquid crystal display screen and the second liquid crystal display screen are in a fully-opened state, the pixel points cannot cause extra obstruction to light, namely, for the whole ultrahigh-contrast liquid crystal display screen, the pixel points are in the states of highest transmittance and brightest light. On the contrary, when the corresponding pixel points (pixel points completely overlapped in the projection direction) in the first liquid crystal display and the second liquid crystal display are both in the "off state", the light at the pixel point is cut off twice, that is, for the whole ultra-high contrast liquid crystal display, the pixel point is in the state of lowest transmittance and darkest (if the contrast of each screen is 500:1, in the "off state", the transmittance is only 1/250000 theoretically).
Drawings
Fig. 1 is a schematic view illustrating a structure of an ultra-high contrast liquid crystal display panel according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the following description is only exemplary of the present invention and should not be construed as limiting the present invention in any way. The various embodiments may be combined with one another to form other embodiments not described below or explicitly shown in the figures.
As shown in fig. 1, the ultra-high contrast lcd panel 100 of the present embodiment includes a first color or black-and-white lcd panel 110, a second black-and-white lcd panel 120, and a driving circuit 130. The second liquid crystal display 120 is superimposed on the first liquid crystal display 110 (as shown in fig. 1, the lower side), so that after the two are superimposed, each pixel point of the first liquid crystal display 110 and each pixel point of the second liquid crystal display 120 are completely overlapped in the projection direction (that is, after the pixel point of the first liquid crystal display 110 is projected on the second liquid crystal display 120, the pixel point of the first liquid crystal display 110 and the corresponding pixel point of the second liquid crystal display 120 are completely overlapped). The driving circuit 130 controls the first liquid crystal display 110 and the second liquid crystal display 120 to operate synchronously.
Further, in order to achieve the above complete coincidence, the sizes, the numbers and the arrangement positions of the pixels of the first liquid crystal display 110 and the second liquid crystal display 120 are completely consistent.
The pixel points of the first and second liquid crystal displays 110 and 120 have a "full-on state" in which light can completely pass therethrough, an "on state" in which light can partially pass therethrough, and an "off state" in which light cannot pass therethrough. It should be understood by those skilled in the art that the "fully open state" and the "closed state" are theoretical states.
The above-mentioned "fully-on state", "on state" and "off state" are states in which different voltages are applied to the liquid crystal material at a certain pixel point to cause the liquid crystal material at that point to assume different optical rotation states. In other words, the optical rotation state of the liquid crystal material changes with a change in applied voltage. The liquid crystal material at the pixel points acts like a light valve.
When the corresponding pixels (completely overlapped pixels in the projection direction) in the first liquid crystal display 110 and the second liquid crystal display 120 are both in the "fully open state", the pixel does not cause an extra obstruction to the light, that is, for the whole ultra-high contrast liquid crystal display 100, the pixel is in the state of highest transmittance and brightest. Conversely, when the corresponding pixel points (the pixel points completely overlapped in the projection direction) in the first liquid crystal display 110 and the second liquid crystal display 120 are both in the "off state", the light at the pixel point is cut off twice, that is, for the whole ultra-high contrast liquid crystal display 100, the pixel point is in the state of lowest transmittance and darkest.
Based on the above principle, it is assumed that the contrast ratios of the first liquid crystal display 110 and the second liquid crystal display 120 are both 500:1 (i.e., the light leakage is 1/500), and if a corresponding pixel point is in the "fully open state", the light leakage of the entire ultra-high contrast liquid crystal display 100 is 500. If a corresponding pixel is in an "off state", light leakage through the second lcd 120 of the lower layer is 1/500, and light leakage through the first lcd 110 of the upper layer is 1/500, and light leakage of the entire ultra-high contrast lcd 100 is 1/250000. Further, the maximum contrast 250000 of the two pixel points is achieved: 1, thereby improving the contrast of the entire liquid crystal display panel 100.
Further, in this embodiment, the polarizer on the side of the first liquid crystal display 110 and the second liquid crystal display 120 opposite to each other is removed, that is, there is no polarizer between the first liquid crystal display 110 and the second liquid crystal display 120. In other words, if the first liquid crystal display panel 110 and the second liquid crystal display panel 120 employ the existing liquid crystal display panel, the polarizer disposed therebetween is removed when they are stacked, thereby preventing the polarizer from attenuating light passing therethrough. Therefore, it is better to ensure that the maximum brightness of the ultra-high contrast liquid crystal display panel 100 remains substantially unchanged compared to the first liquid crystal display panel 110 or the second liquid crystal display panel 120 alone.
Further, in the present embodiment, the first liquid crystal display panel 110 includes a first glass substrate layer 111, a first TFT layer 112, a first liquid crystal material layer 113, a color film layer or a monochrome film layer 114, a second glass substrate layer 115, and a first polarizer 116 stacked from bottom to top.
Further, the second liquid crystal display panel 120 includes a second polarizer 121, a third glass substrate layer 122, a second TFT layer 123, a second liquid crystal material layer 124, a black-and-white monochromatic film layer 125, and a fourth glass substrate layer 126 stacked from bottom to top.
Here, the first glass substrate layer 111 and the fourth glass substrate layer 126 may be glued to realize the superposition of the two, or the first glass substrate layer 111 and the fourth glass substrate layer 126 may be integrally formed (actually, one glass substrate layer is formed) to realize the superposition of the two.
According to an embodiment of the present invention, the absorption axis direction of the first polarizer 111 is parallel or perpendicular to the absorption axis direction of the second polarizer 126. Under the condition that the two light absorption axes are parallel, the liquid crystal display screen which is not electrified is in a normally black state, and under the condition that the two light absorption axes are vertical, the liquid crystal display screen which is not electrified is in a normally white state.
According to an embodiment of the present invention, the first TFT layer 112 and the second TFT layer 123 each include a semiconductor switching device for controlling the operation of a single pixel. More specifically, the semiconductor switching device is composed of a pixel electrode, a semiconductor switch, and a storage capacitor
It will be understood by those skilled in the art that when the first liquid crystal display panel 110 includes the color film layer 114, the resulting ultra-high contrast liquid crystal display panel 100 is a color liquid crystal display panel. When the first liquid crystal display 110 includes a black-and-white monochromatic film layer, the obtained ultra-high contrast liquid crystal display 100 is a black-and-white liquid crystal display (this type of liquid crystal display is more advantageous for application in the field of 3D printing). The second liquid crystal display 120 can only include a black and white monochromatic film layer 125.
According to one embodiment of the present invention, the driving circuit 130 behaves as: the parallel printed circuit boards 131 are driven by the same driver IC 132. The parallel printed circuit boards 131 are respectively connected to the first liquid crystal display 110 and the second liquid crystal display 120, so as to ensure that the pixels in the first liquid crystal display 110 and the second liquid crystal display 120 operate synchronously.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Ultra-high contrast liquid crystal display, its characterized in that includes:
a first liquid crystal display screen which is colored or black and white;
the second black and white liquid crystal display screen is superposed on the first liquid crystal display screen, so that after the first liquid crystal display screen and the second liquid crystal display screen are superposed, each pixel point of the first liquid crystal display screen and each pixel point of the second liquid crystal display screen are completely superposed in the projection direction; and
and the driving circuit controls the first liquid crystal display screen and the second liquid crystal display screen to work synchronously.
2. The ultra-high contrast liquid crystal display panel of claim 1, wherein:
and the polaroids on the opposite sides of the first liquid crystal display screen and the second liquid crystal display screen are removed.
3. The ultra-high contrast liquid crystal display panel according to claim 1 or 2, wherein the first liquid crystal display panel comprises:
the liquid crystal display panel comprises a first glass substrate layer, a first TFT layer, a first liquid crystal material layer, a color film layer or a black-white monochromatic film layer, a second glass substrate layer and a first polarizer which are stacked from bottom to top.
4. The ultra-high contrast liquid crystal display panel of claim 3, wherein the second liquid crystal display panel comprises:
the second polarizer, the third glass substrate layer, the second TFT layer, the second liquid crystal material layer, the black-white monochromatic film layer and the fourth glass substrate layer are stacked from bottom to top.
5. The ultra-high contrast liquid crystal display panel of claim 4, wherein:
the first glass substrate layer is glued to the fourth glass substrate layer.
6. The ultra-high contrast liquid crystal display panel of claim 4, wherein:
the first glass substrate layer and the fourth glass substrate layer are integrally formed.
7. The ultra-high contrast liquid crystal display panel of claim 4, wherein:
the light absorption axis direction of the first polarizer is parallel to or vertical to the light absorption axis direction of the second polarizer.
8. The ultra-high contrast liquid crystal display panel of claim 4, wherein the first TFT layer and the second TFT layer each comprise:
a semiconductor switching device for controlling the operation of the individual pixels.
9. The ultra-high contrast liquid crystal display panel of claim 8, wherein:
the semiconductor switching device is composed of a pixel electrode, a semiconductor switch, and a storage capacitor.
10. The ultra-high contrast liquid crystal display panel of claim 1, wherein:
the sizes, the quantities and the arrangement positions of all pixel points of the first liquid crystal display screen and the second liquid crystal display screen are completely consistent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122053620.XU CN215494432U (en) | 2021-08-27 | 2021-08-27 | Ultra-high contrast liquid crystal display screen |
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| CN202122053620.XU CN215494432U (en) | 2021-08-27 | 2021-08-27 | Ultra-high contrast liquid crystal display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589563A (en) * | 2021-08-27 | 2021-11-02 | 北京博冉泽显示科技有限公司 | Ultra-high contrast liquid crystal display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589563A (en) * | 2021-08-27 | 2021-11-02 | 北京博冉泽显示科技有限公司 | Ultra-high contrast liquid crystal display screen |
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