CN113934071A - Flexible display device and application thereof - Google Patents
Flexible display device and application thereof Download PDFInfo
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- CN113934071A CN113934071A CN202111222608.5A CN202111222608A CN113934071A CN 113934071 A CN113934071 A CN 113934071A CN 202111222608 A CN202111222608 A CN 202111222608A CN 113934071 A CN113934071 A CN 113934071A
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- -1 polyethylene terephthalate Polymers 0.000 claims description 6
- 238000000206 photolithography Methods 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 238000010923 batch production Methods 0.000 abstract description 4
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- 230000004075 alteration Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/212—Mach-Zehnder type
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/225—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference in an optical waveguide structure
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a flexible display device and application thereof, wherein the display device comprises a laser component, a flexible substrate, an optical waveguide array and output gratings which are in one-to-one correspondence with array units in the optical waveguide array; the laser component is used for generating laser, and the laser is injected into the optical waveguide array; the optical waveguide array is arranged on the first surface of the flexible substrate and used for modulating the phase and the light intensity of laser entering the optical waveguide array and transmitting the modulated laser to the output grating for displaying. The flexible display device uses laser as a light source and realizes the transmission of the laser and the modulation of phase and light intensity by combining the optical waveguide array arranged on the flexible substrate, so that the display device has the advantages of wide display color gamut, long service life, high integration level, capability of being made into various special-shaped structures according to requirements, convenience in customization and processing, low cost and the like, and is particularly suitable for batch production.
Description
Technical Field
The invention discloses a flexible display device and application thereof in a multimedia resource playing system, and belongs to the technical field of display devices.
Background
The conventional Display device is a Liquid Crystal Display (LCD) device, in which a Liquid Crystal cell is placed between two parallel glass substrates, a Thin Film Transistor (TFT) is disposed on a lower substrate glass, a color filter is disposed on an upper substrate glass, and a rotation direction of Liquid Crystal molecules is controlled by changing signals and voltages on the TFT, so as to control whether polarized light of each pixel point is emitted, thereby achieving a Display purpose.
However, with the development of society, people have made higher demands on display devices, and display devices based on Light-Emitting diodes (LEDs) have been in the process of being excellent in picture quality, long in life, and environmentally friendly. The power consumption ratio of the LED and the LCD is about 1:10, the LED has better performance in the aspect of video due to higher refreshing rate, a visual angle as wide as 160 degrees can be provided, various characters, numbers, color images and animation information can be displayed, color video signals such as televisions, videos, VCDs, DVDs and the like can also be played, and a plurality of display screens can also be played in a network way.
However, with the improvement of quality of life, LED-based display devices have not yet been able to meet the requirements of people for color saturation and lightness. Therefore, a display device based on an Organic Light-Emitting Diode (OLED) is developed, and the OLED is a flexible display device and has many advantages of self-luminescence, pixel-level Light control, wide viewing angle, high color gamut, fast dynamic response, infinite contrast, and the like, so that the display device based on the OLED displays a picture which is more vivid, three-dimensional, and textured.
However, since the OLED is an organic light emitting semiconductor material, the lifetime thereof is usually only 5000 hours, and there is still a problem of insufficient color purity, so that the OLED-based display device has disadvantages of short lifetime and difficulty in displaying vivid and rich colors.
Disclosure of Invention
An object of the present application is to provide a flexible display device and an application thereof, so as to solve the technical problems of short lifetime and insufficient color expression of the existing OLED-based display device.
The invention provides a flexible display device, which comprises a laser assembly, a flexible substrate, an optical waveguide array and output gratings, wherein the output gratings correspond to array units in the optical waveguide array one by one;
the laser component is used for generating laser, and the laser is injected into the optical waveguide array;
the optical waveguide array is arranged on the first surface of the flexible substrate and used for modulating the phase and the light intensity of the laser which is incident into the optical waveguide array and transmitting the modulated laser to the output grating for displaying.
Preferably, the optical waveguide array comprises a plurality of transmission waveguides arranged in parallel on the flexible substrate;
each transmission waveguide is provided with a plurality of Mach-Zehnder interferometers;
the transmission waveguide is used for transmitting the laser light received from the laser component to the Mach-Zehnder interferometer;
and the Mach-Zehnder interferometer is used for modulating the phase and the light intensity of the laser light entering the Mach-Zehnder interferometer and transmitting the modulated laser light to the output grating for displaying.
Preferably, the mach-zehnder interferometer includes an input interface, a beam splitter, two interference arms, a beam combiner, and an output interface;
the input interface is connected with the transmission waveguide and used for receiving the laser transmitted by the transmission waveguide;
the beam splitter is used for splitting the laser received by the input interface into two beams which are respectively marked as a first laser and a second laser;
the two interference arms are used for respectively receiving the first laser and the second laser and modulating the phase and the light intensity of the first laser and the second laser under the control of voltage;
and the beam combiner is used for combining the modulated first laser and the modulated second laser output by the two interference arms and outputting the combined laser and the combined laser to the output grating for display through an output interface.
Preferably, the laser assembly comprises a laser chip, an input waveguide and a plurality of ring waveguides;
the laser chip is used for generating laser, and the laser is injected into the input waveguide;
the input waveguide is arranged on the first surface of the flexible substrate and is vertically connected with the plurality of transmission waveguides, and the annular waveguide is arranged at each connecting point;
the annular waveguide is used for coupling the laser light on the input waveguide to the transmission waveguide.
Preferably, the input waveguide and the transmission waveguide are both formed inside the flexible substrate by a laser direct writing or photolithography method.
Preferably, the display device further comprises a reflective film layer disposed on the other surface of the flexible substrate for increasing the display brightness of the display device.
Preferably, the display device further comprises a beam expanding unit;
the beam expanding unit is arranged on the light emitting path of the output grating and used for expanding the angle of the output grating for outputting laser.
Preferably, the display device further comprises a coupling lens;
the coupling lens is arranged between the laser chip and the input waveguide and is used for coupling laser generated by the laser chip to the transmission waveguide.
Preferably, the material of the flexible substrate is one or more of polyimide, polyethylene terephthalate and polydimethylsiloxane.
A second aspect of the present invention provides a multimedia asset playing system, which includes the above-mentioned flexible display device.
Compared with the prior art, the flexible display device and the application thereof in the multimedia resource playing system have the following beneficial effects:
the flexible display device uses laser as a light source, and realizes the selection, transmission and path switching of the laser by combining the optical waveguide array arranged on the flexible substrate, so that the display device has the advantages of wide display color gamut, long service life, high integration level, capability of being made into various special-shaped structures according to requirements, convenience in customization and processing, low cost and the like, and is particularly suitable for batch production.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mach-zehnder interferometer in a flexible display device according to an embodiment of the present invention.
FIG. 1 shows a laser module; 11 is a laser chip; 12 is an input waveguide; 13 is a ring waveguide; 2 is a flexible substrate; 3 is an optical waveguide array; 31 is a transmission waveguide; a Mach-Zehnder interferometer at 32; 321 is an input interface; 322 is a beam splitter; 323 is an interference arm; 324 is a control electrode; 325 is a beam combiner, 326 is an output interface; and 4 is an output grating.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention.
As shown in fig. 1, the flexible display device according to the embodiment of the present invention includes a laser assembly 1, a flexible substrate 2, an optical waveguide array 3, and output gratings 4 corresponding to array units in the optical waveguide array 3 one to one;
the laser component 1 is used for generating laser, and the generated laser is injected into the optical waveguide array 3;
the optical waveguide array 3 is disposed on the first surface of the flexible substrate 2, and is configured to modulate a phase and a light intensity of laser light incident into the optical waveguide array, and transmit the modulated laser light to the output grating 4 for display. The flexible substrate 2 is made of one or more of polyimide, polyethylene terephthalate and polydimethylsiloxane, and the flexible substrate 2 made of the above materials has high flexibility, flexibility and variability and can be made into various special-shaped structures according to needs.
The flexible display device uses laser as a light source and realizes the transmission of the laser and the modulation of phase and light intensity by combining the optical waveguide array arranged on the flexible substrate, so that the display device has the advantages of wide display color gamut, long service life, high integration level, capability of being made into various special-shaped structures according to requirements, realization of flexible display, convenience in customized processing, low cost and the like, and is particularly suitable for batch production.
The optical waveguide array 3 in the present embodiment includes a plurality of transmission waveguides 31 arranged in parallel on the flexible substrate 2;
each transmission waveguide 31 is provided with a plurality of modulators, which may be mach-zehnder interferometers 32, directional couplers, electro-absorption modulators, and the like. The present embodiment preferably uses a mach-zehnder interferometer 32 as the modulator;
the transmission waveguide 31 of the present embodiment is for transmitting the laser light received from the laser component 1 to the mach-zehnder interferometer 32;
the mach-zehnder interferometer 32 modulates the phase and intensity of the laser light incident therein, and transmits the modulated laser light to the output grating 4 for display.
Specifically, the mach-zehnder interferometer 32 has a structure as shown in fig. 2, and includes an input interface 321, a beam splitter 322, two interference arms 323, a beam combiner 325, and an output interface 326;
the input interface 321 is connected to the transmission waveguide 31, and is configured to receive the laser light transmitted by the transmission waveguide 31;
the beam splitter 322 is configured to split the laser received by the input interface 321 into two beams, which are respectively marked as a first laser and a second laser;
the two interference arms 323 respectively receive the first laser and the second laser, wherein one of the interference arms 323 is provided with a control electrode 324, and the control electrode 324 controls the two interference arms 323 to modulate the phase and the light intensity of the first laser and the second laser according to the analog control voltage output by the driving circuit; the driving circuit functions to sequentially scan the gray scale of each pixel of each row/column of the video signal row by row/column and output an analog control voltage corresponding to the gray scale of each pixel.
The beam combiner 325 is configured to combine the modulated first laser beam and the modulated second laser beam output by the two interference arms 323 and output the combined laser beam to the output grating 4 through the output interface 326 for displaying.
In the embodiment, the mach-zehnder interferometer 32 is used as a modulator of laser, which has the advantages of large allowable bandwidth, low requirements on both light source and temperature, and the like, so that a display device manufactured by using the mach-zehnder interferometer has wide application range and long service life.
The laser module 1 in the present embodiment includes a laser chip 11, an input waveguide 12, and a plurality of ring waveguides 13;
the laser chip 11 is used for generating laser, and the generated laser is injected into the input waveguide 12;
an input waveguide 12 is disposed on the first surface of the flexible substrate 2 and is vertically connected to the plurality of transmission waveguides 31, and a ring waveguide 13 is disposed at each connection point;
the ring waveguide 13 is used to couple the laser light on the input waveguide 12 to the transmission waveguide 31.
In the present embodiment, the input waveguide 12 and the transmission waveguide 31 may be finished waveguides, for example, finished waveguides obtained by 3D printing, or waveguides formed inside the flexible substrate 2 by a laser direct writing or photolithography method. The present embodiment preferably forms the input waveguide 12 and the transmission waveguide 31 inside the flexible substrate 2 by a laser direct writing or photolithography method.
Since the output grating 4 has a problem of low unidirectional light extraction, the present embodiment provides a reflective film layer on the other surface of the flexible substrate 2 where the transmission waveguide 31 is not provided, and the reflective film layer can increase display output brightness.
Because the output grating 4 still has the problem of narrow viewing angle, the beam expanding unit is disposed on the light exit path of the output grating 4 in this embodiment, so as to expand the angle of the output grating 4 outputting laser light, and make the uniformity of the picture displayed by the display device better. Wherein the beam expanding means is a microlens.
The display device of the embodiment is also provided with a coupling lens;
the coupling lens is disposed between the laser chip and the input waveguide, and is used for coupling the laser light generated by the laser chip to the transmission waveguide 31.
A second aspect of the present invention provides a multimedia asset playing system, which includes the above-mentioned flexible display device.
The flexible display device has the advantages of wide display color gamut, long service life, high integration level, convenience in customized processing and low cost, and is suitable for batch production.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. A flexible display device is characterized by comprising a laser assembly, a flexible substrate, an optical waveguide array and output gratings which are in one-to-one correspondence with array units in the optical waveguide array;
the laser component is used for generating laser, and the laser is injected into the optical waveguide array;
the optical waveguide array is arranged on the first surface of the flexible substrate and used for modulating the phase and the light intensity of the laser which is incident into the optical waveguide array and transmitting the modulated laser to the output grating for displaying.
2. The flexible display device of claim 1, wherein the array of light guides comprises a plurality of transmission waveguides disposed in parallel on the flexible substrate;
each transmission waveguide is provided with a plurality of Mach-Zehnder interferometers;
the transmission waveguide is used for transmitting the laser light received from the laser component to the Mach-Zehnder interferometer;
and the Mach-Zehnder interferometer is used for modulating the phase and the light intensity of the laser light entering the Mach-Zehnder interferometer and transmitting the modulated laser light to the output grating for displaying.
3. The flexible display device of claim 2, wherein the mach-zehnder interferometer comprises an input interface, a beam splitter, two interference arms, a beam combiner, and an output interface;
the input interface is connected with the transmission waveguide and used for receiving the laser transmitted by the transmission waveguide;
the beam splitter is used for splitting the laser received by the input interface into two beams which are respectively marked as a first laser and a second laser;
the two interference arms are used for respectively receiving the first laser and the second laser and modulating the phase and the light intensity of the first laser and the second laser under the control of voltage;
and the beam combiner is used for combining the modulated first laser and the modulated second laser output by the two interference arms and outputting the combined laser and the combined laser to the output grating for display through an output interface.
4. The flexible display device of claim 1, wherein the laser assembly comprises a laser chip, an input waveguide, and a plurality of ring waveguides;
the laser chip is used for generating laser, and the laser is injected into the input waveguide;
the input waveguide is arranged on the first surface of the flexible substrate and is vertically connected with the plurality of transmission waveguides, and the annular waveguide is arranged at each connecting point;
the annular waveguide is used for coupling the laser light on the input waveguide to the transmission waveguide.
5. The flexible display device of claim 4, wherein the input waveguide and the transmission waveguide are each formed inside the flexible substrate by a laser direct writing or photolithography method.
6. The flexible display device according to any one of claims 1 to 5, further comprising a reflective film layer disposed on the other surface of the flexible substrate for increasing the display brightness of the display device.
7. The flexible display device according to any one of claims 1-5, wherein the display device further comprises a beam expanding unit;
the beam expanding unit is arranged on the light emitting path of the output grating and used for expanding the angle of the output grating for outputting laser.
8. The flexible display device according to any of claims 1-5, wherein the display device further comprises a coupling lens;
the coupling lens is arranged between the laser chip and the input waveguide and is used for coupling laser generated by the laser chip to the transmission waveguide.
9. The flexible display device of claim 1, wherein the flexible substrate is made of one or more of polyimide, polyethylene terephthalate, and polydimethylsiloxane.
10. A multimedia asset playback system comprising the flexible display device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222608.5A CN113934071A (en) | 2021-10-20 | 2021-10-20 | Flexible display device and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222608.5A CN113934071A (en) | 2021-10-20 | 2021-10-20 | Flexible display device and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113934071A true CN113934071A (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111222608.5A Pending CN113934071A (en) | 2021-10-20 | 2021-10-20 | Flexible display device and application thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1754121A (en) * | 2002-12-20 | 2006-03-29 | 通用电气公司 | Wideband optical modulator with polymer waveguide and drive amplifier integrated on flexible substrate |
| CN101470311A (en) * | 2007-12-26 | 2009-07-01 | 康佳集团股份有限公司 | Laser display apparatus employing planar optical waveguide array as optical modulator and method thereof |
| CN111999914A (en) * | 2020-08-18 | 2020-11-27 | 华中科技大学 | Method and device for integrating full-dimensional high-speed light field regulation and control |
-
2021
- 2021-10-20 CN CN202111222608.5A patent/CN113934071A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1754121A (en) * | 2002-12-20 | 2006-03-29 | 通用电气公司 | Wideband optical modulator with polymer waveguide and drive amplifier integrated on flexible substrate |
| CN101470311A (en) * | 2007-12-26 | 2009-07-01 | 康佳集团股份有限公司 | Laser display apparatus employing planar optical waveguide array as optical modulator and method thereof |
| CN111999914A (en) * | 2020-08-18 | 2020-11-27 | 华中科技大学 | Method and device for integrating full-dimensional high-speed light field regulation and control |
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