CN112558388A - OLED-based projection system - Google Patents
OLED-based projection system Download PDFInfo
- Publication number
- CN112558388A CN112558388A CN202011237642.5A CN202011237642A CN112558388A CN 112558388 A CN112558388 A CN 112558388A CN 202011237642 A CN202011237642 A CN 202011237642A CN 112558388 A CN112558388 A CN 112558388A
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- Prior art keywords
- lens
- oled
- light source
- display panel
- light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
Abstract
The invention is suitable for the technical field of projection systems, and provides an OLED-based projection system, which comprises: an OLED display panel for generating a self-luminous source; a lens set disposed on the light of the light source emitted from the OLED display panel for projecting the light source pattern emitted from the OLED display panel onto a projection area; the lens is used for projecting the light source pattern focused by the lens group onto the projection area through the lens, wherein the lens comprises a telecentric lens; the OLED display panel can be used as a self-luminous light source, so that the energy utilization rate is high, and the power consumption is low; the lens is set to be a telecentric lens, and the obtained image magnification ratio can not be changed in a certain object distance range through the telecentric lens, so that the projection effect is better. The invention can improve the utilization rate of the light source, has simple structure, effectively reduces energy consumption, improves the imaging quality and can realize the effect of projecting pictures on curved surfaces.
Description
Technical Field
The invention belongs to the technical field of projection systems, and particularly relates to an OLED-based projection system.
Background
An OLED (organic light-emitting diode), also called organic electroluminescent display, or organic light-emitting semiconductor (OLED). The OLED is a current-type organic light emitting device, and emits light by injection and recombination of carriers, and the intensity of light emission is proportional to the injected current. Under the action of an electric field, holes generated by an anode and electrons generated by a cathode move, are respectively injected into a hole transport layer and an electron transport layer, and migrate to a light emitting layer. When the two meet at the light emitting layer, energy excitons are generated, thereby exciting the light emitting molecules to finally generate visible light.
Conventional projectors usually require a white light source or a plurality of monochromatic light sources as a backlight source, and the white light source or the plurality of monochromatic light sources illuminate devices generating transmission or reflection projection patterns, such as a DMD, polarized lenses of three primary colors, liquid crystals, and the like, and the generated patterns are projected through a series of lenses to form a projection picture. The structure is complex, the utilization rate of the light source is low, and an additional light source is needed. And the projection speed of such a system configuration may be limited by the response speed of the device producing the transmissive or reflective projection pattern. The imaging quality may be limited by the resolution of the device producing the transmitted or reflected projection pattern.
Disclosure of Invention
The invention provides a projection system based on an OLED (organic light emitting diode), aiming at solving the problems of poor projection effect, complex structure and high energy consumption.
The invention is thus realized, an OLED-based projection system comprising:
an OLED display panel for generating a self-luminous source;
a lens set disposed on the light of the light source emitted from the OLED display panel for projecting the light source pattern emitted from the OLED display panel onto a projection area;
and the lens is arranged on a light path of the lens group and used for projecting the light source pattern focused by the lens group onto the projection area through the lens, wherein the lens comprises a telecentric lens.
Furthermore, the OLED display panel is in a planar or curved structure.
Further, the OLED display panel has a left-right viewing angle width exceeding 170 degrees.
Still further, the lens group includes: any one or more of a diaphragm, a glass plate with pinholes or a grating or a black opaque pattern or other light-transmitting material, a prism, a lens, a reflector, a polarizing prism, a semitransparent reflector, a polarization beam splitter, a trichromatic beam splitter prism, a filter, a spatial light modulator and a polarizing plate.
Further, the display area of the OLED display panel is provided with one or more light-emitting blocks.
Further, the one or more light-emitting blocks are used to emit a white light source or a monochromatic light source.
Compared with the prior art, the invention has the following beneficial effects: transmitting the light source pattern to a lens by using the lens group, and projecting the light source pattern to a projection area through the lens for display; the OLED display panel can be used as a self-luminous light source, so that the energy utilization rate is high, and the power consumption is low; because the OLED display panel is a continuous light-emitting panel, the pixel block effect and the traditional LED light source strip patterns of the traditional projector can be eliminated (the traditional projection system needs to eliminate the traditional LED light source strip patterns through a light homogenizing device); the lens is set to be a telecentric lens, and the obtained image magnification ratio can not be changed in a certain object distance range through the telecentric lens, so that the projection effect is better. The invention can improve the utilization rate of the light source, has simple structure, effectively reduces energy consumption, improves the imaging quality and can realize the effect of curved surface projection pictures.
Drawings
FIG. 1 is a schematic diagram of an OLED-based projection system according to the present invention;
fig. 2 is a schematic view of a light-emitting block structure of an OLED display panel according to the present invention.
In the figure, 1, an OLED display panel, 2, a lens group, 3, a lens, 4, a projection area, 5 and a light-emitting block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention transmits the light source pattern to the lens group by an OLED display panel, transmits the light source pattern to the lens by the lens group, and projects the light source pattern to a projection area through the lens for display; the OLED display panel can be used as a self-luminous light source, so that the energy utilization rate is high, and the power consumption is low; because the OLED display panel is a continuous light-emitting panel, the pixel block effect and the traditional LED light source strip patterns of the traditional projector can be eliminated (the traditional projection system needs to eliminate the traditional LED light source strip patterns through a light homogenizing device); the lens is set to be a telecentric lens, and the obtained image magnification ratio can not be changed in a certain object distance range through the telecentric lens, so that the projection effect is better.
Example one
The present invention provides an OLED-based projection system, as shown in fig. 1, comprising: an OLED display panel 1 for generating a self-luminous light source; a lens group 2, the lens group 2 is arranged on the light of the light source emitted by the OLED display panel 1 and is used for projecting the light source pattern emitted by the OLED display panel 1 onto a projection area 4; and the lens 3 is arranged on the optical path of the lens group 2 and used for projecting the light source pattern focused by the lens group 2 onto the projection area 4 through the lens 3, wherein the lens 3 comprises a telecentric lens 3.
The Telecentric lens 3(Telecentric) is mainly designed for correcting the parallax of the conventional industrial lens 3, and can ensure that the magnification of the obtained image is not changed within a certain object distance range, which is very important for the case that the measured object is not on the same object plane.
Specifically, a light source pattern is sent to a lens group 2 by an OLED display panel 1, the light source pattern is transmitted to a lens 3 by the lens group 2, and the light source pattern is projected to a projection area 4 through the lens 3 for display; the OLED display panel 1 can be used as a self-luminous light source, so that the energy utilization rate is high, and the power consumption is low; because the OLED display panel is a continuous light-emitting panel, the pixel block effect and the traditional LED light source strip patterns of the traditional projector can be eliminated (the traditional projection system needs to eliminate the traditional LED light source strip patterns through a light homogenizing device); by setting the lens 3 as the telecentric lens 3, the obtained image magnification ratio can not be changed within a certain object distance range through the telecentric lens 3, and the projection effect is better.
In this embodiment, as shown in fig. 1, the OLED display panel 1 has a planar or curved structure. The bending degree of the patterns of the OLED display panel 1 in the shapes and sizes can be flexibly customized, the color of a light source can be flexibly customized, and the LED display panel can adapt to wider and more complex application scenes. The OLED display panel 1 has the characteristics of self-luminous source, high energy utilization rate, low power consumption and the like.
The OLED can be produced on different flexible substrate materials such as plastics and resin, and the soft screen can be realized by evaporating or coating an organic layer on a plastic substrate. Therefore, the pattern focal plane projected by the OLED-based projector can be a plane or a curved surface, and the application scene is wider. Because the finished OLED product has light weight, light and thin volume and self-luminescence, the projection system structure based on the OLED can be made smaller, lighter and more portable.
In this embodiment, as shown in fig. 1, the left and right viewing angle width of the OLED display panel 1 exceeds 170 degrees. The OLED display panel 1 has a wide viewing angle as a light source of a projector, and since the OLED is actively illuminated, a picture is not distorted over a wide viewing angle range compared to other displays. The upper and lower view angles and the left and right view angles exceed 170 degrees, so that the application scenes are wider.
In this embodiment, referring to fig. 1, the lens group 2 includes: any one or more of a diaphragm, a glass plate with pinholes or a grating or a black opaque pattern or other light-transmitting material, a prism, a lens, a reflector, a polarizing prism, a semitransparent reflector, a polarization beam splitter, a trichromatic beam splitter prism, a filter, a spatial light modulator and a polarizing plate. The light transmission effect is good, so that the projection effect is better. A stop is an entity that acts to limit the light beam in an optical system. It may be the edge of a lens, a frame or a specially provided screen with holes. Its effect can be divided into two aspects, which facilitate limiting the beam or limiting the size of the field of view (imaging range). Thereby improving the projection efficiency of the zoom projection system. The zoom projection system can be applied to intraoral scanners of teeth and the like, and has a wide application range.
In this embodiment, as shown in fig. 1-2, the display area of the OLED display panel 1 is provided with one or more light-emitting blocks 5. The display area of the OLED display panel 1 is formed by one or more light-emitting blocks 5, and the shapes, sizes and numbers of the light-emitting blocks 5 can be customized according to actual requirements. The OLED display panel 1 may thus not be limited to pixel blocks, specific patterns such as a plurality of light emitting strips, non-dense pin hole patterns, and the like. The patterns are various, and the visual effect is better. Meanwhile, the response speed of the OLED display panel 1 is high, and the response time can reach microsecond level. The moving image is better realized due to higher response speed, and the projector can be used as a high-speed projector.
In this embodiment, as shown in fig. 1-2, the one or more light-emitting blocks 5 are used to emit a white light source or a monochromatic light source. The OLED display panel 1 directly projects the patterns out from the white light source or the monochromatic light source to generate a projection picture, so that the utilization rate of the light source is greatly improved, and the OLED display panel has the advantages of simple structure, low power consumption and the like.
Further, OLEDs can operate over a wide temperature range compared to LCDs, and can operate properly at temperatures from-40 to 80 degrees celsius, as analyzed by the relevant technology. Therefore, the regional limitation can be reduced, and the solar water heater can be normally used in extremely cold regions. Thus, the OLED projector can work in a more severe scene.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. An OLED-based projection system, comprising:
an OLED display panel for generating a self-luminous source;
a lens set disposed on the light of the light source emitted from the OLED display panel for projecting the light source pattern emitted from the OLED display panel onto a projection area;
and the lens is arranged on a light path of the lens group and used for projecting the light source pattern focused by the lens group onto the projection area through the lens, wherein the lens comprises a telecentric lens.
2. The OLED-based projection system of claim 1, wherein the OLED display panel is in the shape of a planar or curved structure.
3. The OLED based projection system of claim 1 wherein the OLED display panel has a left-right viewing angle width in excess of 170 degrees.
4. The OLED-based projection system of claim 1, wherein said lens group includes: any one or more of a diaphragm, a glass plate with pinholes or a grating or a black opaque pattern or other light-transmitting material, a prism, a lens, a reflector, a polarizing prism, a semitransparent reflector, a polarization beam splitter, a trichromatic beam splitter prism, a filter, a spatial light modulator and a polarizing plate.
5. The OLED-based projection system of claim 1, wherein the display area of the OLED display panel is provided with one or more light-emitting blocks.
6. The OLED-based projection system of claim 5, wherein the one or more light-emitting blocks are configured to emit a white light source or a monochromatic light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237642.5A CN112558388A (en) | 2020-11-09 | 2020-11-09 | OLED-based projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237642.5A CN112558388A (en) | 2020-11-09 | 2020-11-09 | OLED-based projection system |
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| Publication Number | Publication Date |
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| CN112558388A true CN112558388A (en) | 2021-03-26 |
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| CN202011237642.5A Pending CN112558388A (en) | 2020-11-09 | 2020-11-09 | OLED-based projection system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100220297A1 (en) * | 2005-08-29 | 2010-09-02 | 3M Innovative Properties Company | Illumination system and projection system incorporating same |
| CN201600541U (en) * | 2009-11-13 | 2010-10-06 | 惠州市华阳多媒体电子有限公司 | Miniature projector light source device and miniature projector |
| CN110879473A (en) * | 2019-11-27 | 2020-03-13 | 歌尔股份有限公司 | Projection lens assembly and head-mounted display device |
| CN111007689A (en) * | 2019-12-04 | 2020-04-14 | 陕西极视光电科技有限公司 | Energy-saving projector capable of controlling dynamic HDR of light source brightness in partition mode |
| CN111679540A (en) * | 2020-06-22 | 2020-09-18 | 深圳康佳电子科技有限公司 | Projection device |
-
2020
- 2020-11-09 CN CN202011237642.5A patent/CN112558388A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100220297A1 (en) * | 2005-08-29 | 2010-09-02 | 3M Innovative Properties Company | Illumination system and projection system incorporating same |
| CN201600541U (en) * | 2009-11-13 | 2010-10-06 | 惠州市华阳多媒体电子有限公司 | Miniature projector light source device and miniature projector |
| CN110879473A (en) * | 2019-11-27 | 2020-03-13 | 歌尔股份有限公司 | Projection lens assembly and head-mounted display device |
| CN111007689A (en) * | 2019-12-04 | 2020-04-14 | 陕西极视光电科技有限公司 | Energy-saving projector capable of controlling dynamic HDR of light source brightness in partition mode |
| CN111679540A (en) * | 2020-06-22 | 2020-09-18 | 深圳康佳电子科技有限公司 | Projection device |
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Application publication date: 20210326 |
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