CN-121995673-A - Display device

CN121995673ACN 121995673 ACN121995673 ACN 121995673ACN-121995673-A

Abstract

The disclosure provides a display device comprising a backlight module, a light adjustment unit arranged on the backlight module and comprising a first substrate, a second substrate arranged corresponding to the first substrate, a liquid crystal layer arranged between the first substrate and the second substrate, a first electrode layer arranged between the first substrate and the liquid crystal layer and comprising a plurality of first patterns, and a display unit arranged on the light adjustment unit, wherein each of the plurality of first patterns has a first width, two adjacent first patterns of the plurality of first patterns have a first distance, the ratio of the first width to the first distance is greater than or equal to 0.5 and less than or equal to 7.5, and the phase delay of the liquid crystal layer is greater than or equal to 500 nm and less than or equal to 2700 nm.

Inventors

ZENG YUZHI
XIE HONGSHENG
LAI GUIHONG
XU XUKUAN

Assignees

群创光电股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. A display device, comprising: A backlight module; a light adjusting unit disposed on the backlight module and comprising: A first substrate; The second substrate is arranged corresponding to the first substrate; a liquid crystal layer disposed between the first and second substrates, and A first electrode layer disposed between the first substrate and the liquid crystal layer and including a plurality of first patterns, and A display unit disposed on the light adjustment unit; Each of the first patterns has a first width, and two adjacent first patterns of the first patterns have a first distance, a ratio of the first width to the first distance is greater than or equal to 0.5 and less than or equal to 7.5, and a phase retardation of the liquid crystal layer is greater than or equal to 500 nm and less than or equal to 2700 nm.
2. The display device of claim 1, wherein one of two adjacent first patterns of the plurality of first patterns is a first electrode, and another one of two adjacent first patterns of the plurality of first patterns is a second electrode, the first electrode being different from the second electrode.
3. The display device according to claim 2, wherein the light adjusting unit further comprises a second electrode layer disposed between the second substrate and the liquid crystal layer, wherein the second electrode layer comprises a second pattern overlapping the plurality of first patterns, wherein the second pattern is a third electrode, and a voltage of the third electrode is between a voltage of the first electrode and a voltage of the second electrode.
4. A display device according to claim 3, wherein the voltage difference between the first electrode and the third electrode is equal to the voltage difference between the second electrode and the third electrode.
5. A display device according to claim 3, wherein liquid crystal in the liquid crystal layer is vertically aligned adjacent to the first substrate and liquid crystal in the liquid crystal layer is horizontally aligned adjacent to the second substrate.
6. A display device according to claim 3, wherein the ratio of the first width to the first distance is greater than or equal to 0.5 and less than or equal to 3.
7. The display device according to claim 1, wherein the light adjustment unit further comprises a second electrode layer disposed between the second substrate and the liquid crystal layer, wherein the second electrode layer comprises a plurality of second patterns, wherein two adjacent first patterns of the plurality of first patterns have a first pitch, two adjacent second patterns of the plurality of second patterns have a second pitch, and a ratio of the second pitch to the first pitch is greater than 0 and less than or equal to 2.
8. The display device of claim 7, wherein one of two adjacent first patterns of the plurality of first patterns is a first electrode, another one of two adjacent first patterns of the plurality of first patterns is a second electrode, the first electrode is different from the second electrode, and one of two adjacent second patterns of the plurality of second patterns is a third electrode, another one of two adjacent second patterns of the plurality of second patterns is a fourth electrode, the third electrode is different from the fourth electrode.
9. The display device of claim 7, wherein one of the plurality of first patterns is a first electrode, one of the plurality of second patterns is a second electrode, and the first electrode is different from the second electrode.
10. The display device of claim 1, wherein the light adjustment unit further comprises a first alignment film and a second alignment film, the first alignment film being disposed between the first substrate and the liquid crystal layer, the second alignment film being disposed between the second substrate and the liquid crystal layer, wherein the first alignment film has a first rubbing direction, the second alignment film has a second rubbing direction, and the first rubbing direction is parallel to the second rubbing direction.

Description

Display device Technical Field The disclosure relates to the field of display devices, and in particular, to a display device with a peep-proof effect. Background With the continuous development of technology, display devices are designed with anti-peeping, low energy consumption, high quality or low cost. Nowadays, a display device with a concentrated light source is mostly obtained by attaching a peep-proof sheet on the display device or using a collimation type backlight module (collimated backlight) and the like, so as to achieve privacy effect. However, the above method still has the disadvantages of high energy consumption, high cost or low yield. Therefore, there is a need to provide a new display device to improve the above-mentioned drawbacks. Disclosure of Invention The disclosure provides a display device, which is characterized by comprising a backlight module, a light adjusting unit arranged on the backlight module and comprising a first substrate, a second substrate arranged corresponding to the first substrate, a liquid crystal layer arranged between the first substrate and the second substrate, a first electrode layer arranged between the first substrate and the liquid crystal layer and comprising a plurality of first patterns, and a display unit arranged on the light adjusting unit, wherein each of the plurality of first patterns has a first width, two adjacent first patterns of the plurality of first patterns have a first distance, the ratio of the first width to the first distance is larger than or equal to 0.5 and smaller than or equal to 7.5, and the phase delay of the liquid crystal layer is larger than or equal to 500 nm and smaller than or equal to 2700 nm. Drawings Fig. 1 is a schematic perspective view of a display device according to an embodiment of the disclosure; FIG. 2 is a schematic perspective view of a light adjustment unit according to an embodiment of the disclosure; FIG. 3 is a schematic cross-sectional view of a light conditioning unit according to an embodiment of the present disclosure; FIG. 4 is a plot of the ratio of the first width to the first distance of the electrodes at different first pitches versus the ratio of the 45 degree angle luminance to the 0 degree angle luminance for a light adjustment unit according to an embodiment of the present disclosure; FIG. 5 is a plot of the ratio of the first width to the first distance of the electrodes versus the ratio of the 45 degree angle brightness to the 0 degree angle brightness for the light conditioning unit according to an embodiment of the present disclosure at different phase delays; FIG. 6 is a schematic perspective view of a light conditioning unit according to another embodiment of the present disclosure; FIG. 7 is a schematic cross-sectional view of a light conditioning unit according to another embodiment of the present disclosure; FIG. 8 is a plot of the ratio of the first width to the first distance of the electrodes at different first pitches versus the ratio of 45 degree angle brightness to 0 degree angle brightness for a light conditioning unit according to another embodiment of the present disclosure; FIG. 9 is a plot of the ratio of the first width to the first distance of the electrodes versus the ratio of 45 degree angle luminance to 0 degree angle luminance for a light conditioning unit according to another embodiment of the present disclosure at different phase delays; FIG. 10 is a schematic perspective view of a light conditioning unit according to another embodiment of the present disclosure; Fig. 11 is a schematic perspective view of a light adjustment unit according to another embodiment of the present disclosure. [ Reference numerals description ] 1. Backlight module 100. Display device 2. Light adjusting unit 21. A first substrate 22. A second substrate 23. Liquid crystal layer 24. A first electrode layer 241. First pattern 2411. First electrode 2412. Second electrode 25. A second electrode layer 251. Second pattern 2511. Third electrode 2512. Fourth electrode 26. First alignment film 27. Second alignment film 3. Display unit 31. Third polarizer 32. Third substrate 33. Third electrode layer 34. Fourth substrate 35. Fourth polarizer Angle a L length direction Re phase retardation P1 first pitch P2 second pitch S1 first distance S2 second distance W1 first width W2 second width Detailed Description The following describes an electronic device according to an embodiment of the present disclosure in detail. It should be understood that the following description provides many different embodiments for implementing different aspects of some embodiments of the disclosure. The particular elements and arrangements described below are merely for simplicity and clarity in describing some embodiments of the present disclosure. These are, of course, merely examples and are not intended to be limiting of the present disclosure. Moreover, similar and/or corresponding reference numerals may be used in dif