CN103901653A - Micro-display device with optical camera shooting function - Google Patents
Micro-display device with optical camera shooting function Download PDFInfo
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- CN103901653A CN103901653A CN201410166707.XA CN201410166707A CN103901653A CN 103901653 A CN103901653 A CN 103901653A CN 201410166707 A CN201410166707 A CN 201410166707A CN 103901653 A CN103901653 A CN 103901653A
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Abstract
The invention discloses a micro-display device with the optical camera shooting function. The micro-display device with the optical camera shooting function comprises a semiconductor chip, a transparent substrate and a liquid crystal layer, wherein the semiconductor chip is provided with a drive circuit; the liquid crystal layer is arranged between the semiconductor chip and the transparent substrate; the top layer of the semiconductor chip is provided with pixel electrodes for loading voltage to achieve displaying of dynamic images; CMOS light sensitive units with independent line drive circuits to finish shooting of the dynamic shot images are arranged between the pixel electrodes. The CMOS light sensitive units are prepared on the micro-display chip, so that shooting and displaying share the same optical path system, real shot scenes and micro-display images are fused highly, and dynamic images of human eyes can be shot in real time.
Description
Technical field
The present invention relates to a kind of display device, especially relate to a kind of micro-display device simultaneously with camera function.
Background technology
Micro-multiple technologies that show, comprising: liquid crystal on silicon, silica-based OLED, the devices such as DLP and MEMS.Liquid crystal on silicon (LCoS) technology is relatively ripe, below the preferred structure of described the present invention will describe as an example of LCoS example, shown in Fig. 1, be the top level structure schematic diagram of traditional LC oS micro display chip.Traditional micro display chip has two kinds of common structures, i.e. monochromatic display chip (left side structure in Fig. 1) and colored display chip (the right structure in Fig. 1).The corresponding foursquare electrode of each display pixel (being a kind of conventional include monochrome pixels electrode shape as shown in the left side in Fig. 1) of monochromatic display chip, the mode of time-division that adopts monochromatic display chip realizes colored demonstration, because red, green, blue three looks share same pixel cell, be therefore conducive to the miniaturization of pixel cell size.
Each pixel of colored display chip is made up of (if the right in Fig. 1 is a kind of color sub-pixel structure of typical delta structure three sub-pixels of red, green, blue, in figure, rectangle represents respectively the electrode zone of sub-pixel, and the word in rectangle frame represents the color of sub-pixel).In figure, the dotted line in the upper left corner represents that a pixel cell is made up of adjacent red, green, blue three sub-pixels.
Shown in Fig. 2, be sectional structure chart (list of references 1:David Armitage, Ian Underwood, the Shin-Tson Wu of traditional LC oS micro display chip, " Introduction to Microdisplays ", John Wiley & Sons, Ltd, 2006).In figure, micro display chip is made up of three-decker, is topmost transparent electrically-conductive backing plate 12, the normally glass substrate with ITO conductive layer; Centre is liquid crystal layer 13, and common liquid crystal mode of operation has TN pattern and VA pattern; Orlop is semi-conductor silicon chip 11, is provided with show electrode 14 on semi-conductor silicon chip.Major function comprises the Drive of row and column of pixel cell, with dynamic refresh of pixel electrode voltage etc., in figure, simplifying the electrode structure that has only drawn top layer (is the fundamental diagram of traditional LC oS pixel cell shown in Fig. 6, each pixel cell comprises that a triode connects respectively column electrode, row electrode and pixel electrode, between the pixel electrode of semi-conductor silicon chip and the ITO conductive layer of upper substrate, on-load voltage can cause liquid crystal to change orientation, thereby realize the modulation to incident light), for colored display chip, above electrode, also can prepare one deck colour filter, corresponding red respectively, green, blue three look color filters.
In Fig. 2, undermost silicon-based semiconductor integrated circuit adopts traditional semiconductor technology preparation conventionally, therefore except realizing the Drive of row and column function of micro-display device, and all right integrated various large scale integrated circuit functions, such as SRAM, analog to digital conversion etc.
The small image that wearable intelligent glasses adopts micro display chip and waveguide imaging arrangement that micro display chip is shown directly projects in people's eyes, makes human eye on virtual screen, see enlarged image forwardly.Take the intelligent glasses (Google glass) of Google as example, it has adopted liquid crystal on silicon (LCoS) micro display chip to show image.
Intelligent glasses, as wearable device, has video capture function simultaneously, can take in real time the live view that intelligent glasses wearer is watched.This shoot function, compared with traditional mobile phone shoot function, not only has higher use portability, simultaneously due to human eye watch visual field height consistent, for novel augmented reality application provides good platform.
But in current intelligent glasses product, wearable intelligent glasses product generally adopts independently micro display chip and shooting chip, completes respectively the demonstration of virtual image and the shooting of reality scene.The demonstration separating and camera system exist and show the inconsistent of image and shot object, thereby have reduced in augmented reality application the height syncretizing effect of the dummy object of demonstration and real-world object.Therefore in augmented reality display application, need between photographic images and display image content, carry out locus rectification, increase the difficulty of design and the production of product.
Summary of the invention
The object of this invention is to provide a kind of micro-display device with optical pickup function, this micro-display device is prepared CMOS optical sensor on micro display chip, make to take and show and share same light path system, thereby guarantee that the reality scene of shooting and the height of micro-demonstration image merge, and are also beneficial to the dynamic image of real-time shooting human eye simultaneously.
Object of the present invention is achieved through the following technical solutions:
A kind of micro-display device with optical pickup function, comprise the semi-conductor chip, the transparency carrier that are prepared with driving circuit, be arranged on the liquid crystal layer between semi-conductor chip and transparency carrier, be provided with on-load voltage at the top layer of semi-conductor chip and realize the pixel electrode that dynamic image shows, it is characterized in that: between pixel electrode, be prepared with the CMOS photosensitive unit with independent rows column drive circuit.
In the present invention, above pixel electrode, there are liquid crystal layer, on-load voltage can change the liquid crystal modulation angle reverse to incident polarisation of light.Or pixel electrode is OLED structure above, and on-load voltage can be realized the luminescence display of pixel cell.CMOS photosensitive unit can complete the shooting of dynamic video image.
The preferred pixel electrode of the present invention can be LCoS display unit.CMOS photosensitive unit is positioned at LCoS display unit, or CMOS photosensitive unit is between LCoS display unit gap.CMOS photosensitive unit can be corresponding one by one with LCoS display unit, or CMOS photosensitive unit and LCoS display unit inconsistent in space distribution.
There is color filter at pixel electrode and CMOS photosensitive unit top.CMOS photosensitive unit can adopt with LCoS display unit the color filter of identical wavelength, realizes the shooting of coloured image.CMOS photosensitive unit can adopt with LCoS display unit the color filter of different wave length, realizes infrared shooting.
The invention has the beneficial effects as follows: the present invention is prepared CMOS optical sensor on micro display chip, due to show and shooting be positioned on same chip, make to take and show and share same light path system, thereby guarantee that the reality scene of shooting and the height of micro-demonstration image merge, and are also beneficial to the dynamic image of real-time shooting human eye simultaneously.
The proposed by the invention technology that CMOS photosensitive unit is prepared on micro display chip is equally applicable to silica-based OLED, the micro display chips such as DLP and MEMS.
Accompanying drawing explanation
Fig. 1-1st, the top level structure schematic diagram of monochromatic display chip in traditional LC oS micro display chip.
Fig. 1-2 is the top level structure schematic diagram of colored display chip in traditional micro display chip.
Fig. 2 is the cross-sectional view of traditional micro display chip.
It shown in Fig. 3, is the preferred micro display chip cross-sectional view of the present invention.
It shown in Fig. 4, is the preferred monochromatic micro display chip top level structure schematic diagram of the present invention.
It shown in Fig. 5, is the preferred colored micro display chip top level structure schematic diagram of the present invention.
Fig. 6 is the fundamental diagram of traditional LC oS pixel cell.
Fig. 7 is the fundamental diagram of traditional cmos photosensitive unit.
Embodiment
A kind of micro-display device with optical pickup function, see Fig. 3, this micro-display device comprises the semi-conductor chip 1, the transparency carrier 2 that are prepared with driving circuit, be arranged on the liquid crystal layer 3 between semi-conductor chip and transparency carrier, be provided with on-load voltage at the top layer of semi-conductor chip and realize the pixel electrode 4 that dynamic image shows, between pixel electrode, be prepared with and there is Drive of row and column circuit independently and complete the CMOS photosensitive unit 5 that dynamic video image is taken.Above pixel electrode, there are liquid crystal layer, on-load voltage can change the liquid crystal modulation angle reverse to incident polarisation of light.Or pixel electrode is OLED structure above, and on-load voltage can be realized the luminous of pixel cell.
The preferred pixel electrode of the present invention is LCoS display unit.CMOS photosensitive unit is positioned at LCoS display unit, or CMOS photosensitive unit is between LCoS display unit gap.CMOS photosensitive unit can be corresponding one by one with LCoS display unit, or CMOS photosensitive unit and LCoS display unit inconsistent in space distribution.
There is color filter at pixel electrode and CMOS photosensitive unit top.CMOS photosensitive unit can adopt with LCoS display unit the color filter of identical wavelength, realizes the shooting of coloured image.CMOS photosensitive unit can adopt with LCoS display unit the color filter of different wave length, for example, adopts infrared color filter to realize infrared shooting.
The present invention prepares CMOS photosensitive circuit on semi-conductor silicon chip simultaneously, CMOS photosensitive array is integrated on the same semi-conductor silicon chip of LCoS micro display chip, realizes image and show and shoot function on same chip.
It shown in Fig. 3, is the preferred monochromatic micro display chip sectional structure chart of the present invention, be with the maximum differential of traditional LC oS micro display chip, (traditional structure of cmos sensor is with reference to list of references 2: Wang Qingyou between adjacent display pixel cells, to have inserted a CMOS photosensitive unit, " image sensor application technology ", Electronic Industry Press, 2013); It shown in Fig. 7, is the fundamental diagram of traditional logarithmic response type CMOS-APS photosensitive unit, this photosensitive unit has very high dynamic range, its pixel cell structure is made up of photodiode D0, load pipe M0, source follower M1 and row gate tube M2, load tube grid is a constant bias voltage (if not necessarily supply voltage), this pixel cell output signal becomes logarithmic relationship with incident optical signal, and its work characteristics is that light is converted into signal voltage continuously.CMOS photosensitive unit array and LCoS array of display cells, and Drive of row and column circuit control separately, be positioned on same semi-conductor silicon chip, but independent separately.Traditional CMOS photosensitive unit top comprises a lenticule, be used for making convergence of rays at photosensitive unit, in preferred version of the present invention, owing to need to guaranteeing that cmos cell and LCoS unit have consistent smooth upper surface to meet the requirement of liquid crystal aligning layer effects on surface flatness, will save traditional microlens structure in preferred version of the present invention.In space distribution, because the size of cmos cell is much smaller than LCoS unit, cmos cell can be embedded in LCoS display unit, in figure, black region represents cmos cell as shown in Figure 3.Fig. 4 is the semi-conductor chip top level structure schematic diagram of preferred structure of the present invention, and cmos cell is positioned at the lower right corner place of each LCoS display unit, now can realize monochrome image and take; When in the time that LCoS display unit top layer increases color filter (top level structure as shown in the right in Fig. 1), cmos cell can be positioned at LCoS display unit color filter shared with it, now can realize coloured image shoot function.
Due to cmos cell and LCoS unit separate, and without corresponding one by one, except the preferred technical scheme of the present invention, can also between LCoS display unit, embed cmos cell, or adopt the more CMOS array of low resolution, each cmos cell is dispersed between the gap of multiple LCoS, and researcher in this field can design various array modes as required.
It shown in Fig. 5, is the preferred colored micro display chip top level structure structural drawing of the present invention.In figure, CMOS photosensitive unit is positioned at the gap of red, green, blue three color pixel unit, the region that in figure, letter " C " indicates.The schematic diagram that has just drawn " C " areal distribution in figure, this area researchist can design various difformities and arrangement mode according to the actual requirements.The advantage of this structure is that CMOS top layer can adopt the color filter from red, green, blue three looks different, and for example can adopt transmission region is infrared color filter, thereby realizes infrared image shoot function.This infrared shooting function can be applied to eye tracking location, and the real-time shooting of reality scene under low-light (level) environment.
Claims (9)
1. one kind has the micro-display device of optical pickup function, comprise the semi-conductor chip (1), the transparency carrier (2) that are prepared with driving circuit, be arranged on the liquid crystal layer (3) between semi-conductor chip (1) and transparency carrier (2), be provided with on-load voltage at the top layer of semi-conductor chip (1) and realize the pixel electrode (4) that dynamic image shows, it is characterized in that: between pixel electrode (2), be prepared with the CMOS photosensitive unit (5) with independent rows column drive circuit.
2. the micro-display device with optical pickup function according to claim 1, is characterized in that: described pixel electrode (4) is LCoS display unit.
3. the micro-display device with optical pickup function according to claim 2, is characterized in that: CMOS photosensitive unit (5) is positioned at LCoS display unit.
4. the micro-display device with optical pickup function according to claim 2, is characterized in that: CMOS photosensitive unit (5) is between LCoS display unit gap.
5. the micro-display device with optical pickup function according to claim 2, is characterized in that: CMOS photosensitive unit (5) is corresponding one by one with LCoS display unit.
6. the micro-display device with optical pickup function according to claim 2, is characterized in that: CMOS photosensitive unit (5) is inconsistent in space distribution with LCoS display unit.
7. the micro-display device with optical pickup function according to claim 1, is characterized in that: have color filter at pixel electrode (4) and CMOS photosensitive unit (5) top.
8. the micro-display device with optical pickup function according to claim 7, is characterized in that: CMOS photosensitive unit (5) and LCoS display unit adopt the color filter of identical wavelength.
9. the micro-display device with optical pickup function according to claim 7, is characterized in that: CMOS photosensitive unit (5) and LCoS display unit adopt the color filter of different wave length.
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| CN104407440A (en) * | 2014-11-19 | 2015-03-11 | 东南大学 | Holographic display device with sight tracking function |
| CN104570449A (en) * | 2015-01-29 | 2015-04-29 | 京东方科技集团股份有限公司 | Display panel, manufacturing method of display panel, and display device |
| CN104601974A (en) * | 2014-12-30 | 2015-05-06 | 深圳市亿思达科技集团有限公司 | Eye-tracking-based holographic display and holographic display device |
| CN105161020A (en) * | 2015-10-21 | 2015-12-16 | 上海集成电路研发中心有限公司 | Screen and portable electronic device with the same |
| CN106019671A (en) * | 2016-07-22 | 2016-10-12 | 杨永建 | Unit integrating display and camera shooting, component and panel |
| WO2017080057A1 (en) * | 2015-11-13 | 2017-05-18 | 小米科技有限责任公司 | Oled panel, terminal, and photosensitive control method |
| CN106847092A (en) * | 2017-03-10 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of display panel, display device and its method for obtaining image |
| CN107038960A (en) * | 2017-06-15 | 2017-08-11 | 赵其煜 | A kind of micro-display system and its implementation |
| WO2017185786A1 (en) * | 2016-04-29 | 2017-11-02 | 努比亚技术有限公司 | Cmos device for achieving global exposure, terminal thereof and exposure control method therefor |
| CN107728361A (en) * | 2017-09-19 | 2018-02-23 | 捷开通讯(深圳)有限公司 | Display panel and electronic equipment with camera function |
| CN105355640B (en) * | 2015-11-16 | 2018-08-28 | 上海集成电路研发中心有限公司 | Smart mobile phone screen, system and preparation method |
| CN108919553A (en) * | 2018-07-26 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of production method of display panel, display device and display panel |
| WO2019205576A1 (en) * | 2018-04-26 | 2019-10-31 | 京东方科技集团股份有限公司 | Color film substrate and manufacture method therefor, display panel, display device and operation method |
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| CN104407440A (en) * | 2014-11-19 | 2015-03-11 | 东南大学 | Holographic display device with sight tracking function |
| CN104601974A (en) * | 2014-12-30 | 2015-05-06 | 深圳市亿思达科技集团有限公司 | Eye-tracking-based holographic display and holographic display device |
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| CN106019671A (en) * | 2016-07-22 | 2016-10-12 | 杨永建 | Unit integrating display and camera shooting, component and panel |
| CN106019671B (en) * | 2016-07-22 | 2023-12-22 | 杨永建 | Unit, assembly and board integrating display and camera shooting |
| CN106847092A (en) * | 2017-03-10 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of display panel, display device and its method for obtaining image |
| CN106847092B (en) * | 2017-03-10 | 2020-03-31 | 京东方科技集团股份有限公司 | Display panel, display device and method for acquiring image |
| WO2018161563A1 (en) * | 2017-03-10 | 2018-09-13 | 京东方科技集团股份有限公司 | Display panel, and display device and image acquisition method thereof |
| US10623697B2 (en) | 2017-03-10 | 2020-04-14 | Boe Technology Group Co., Ltd. | Display panel, display device and image pickup method therefor |
| CN107038960A (en) * | 2017-06-15 | 2017-08-11 | 赵其煜 | A kind of micro-display system and its implementation |
| CN107728361A (en) * | 2017-09-19 | 2018-02-23 | 捷开通讯(深圳)有限公司 | Display panel and electronic equipment with camera function |
| WO2019205576A1 (en) * | 2018-04-26 | 2019-10-31 | 京东方科技集团股份有限公司 | Color film substrate and manufacture method therefor, display panel, display device and operation method |
| US11587965B2 (en) | 2018-04-26 | 2023-02-21 | Boe Technology Group Co., Ltd. | Display panel and manufacturing method thereof, display device and operation method thereof |
| CN108919553B (en) * | 2018-07-26 | 2023-03-14 | 京东方科技集团股份有限公司 | Display panel, display device and manufacturing method of display panel |
| CN108919553A (en) * | 2018-07-26 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of production method of display panel, display device and display panel |
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