WO2018176798A1 - 显示单元、像素电路及其驱动方法和显示面板 - Google Patents

显示单元、像素电路及其驱动方法和显示面板 Download PDF

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Publication number
WO2018176798A1
WO2018176798A1 PCT/CN2017/106036 CN2017106036W WO2018176798A1 WO 2018176798 A1 WO2018176798 A1 WO 2018176798A1 CN 2017106036 W CN2017106036 W CN 2017106036W WO 2018176798 A1 WO2018176798 A1 WO 2018176798A1
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Prior art keywords
transistor
electrode
display
unit
substrate
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Application number
PCT/CN2017/106036
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English (en)
French (fr)
Inventor
王延峰
吕振华
王志东
徐晓玲
杜渊鑫
张洪术
胡伟频
魏从从
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/767,281 priority Critical patent/US10643526B2/en
Publication of WO2018176798A1 publication Critical patent/WO2018176798A1/zh

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    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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Definitions

  • Embodiments of the present disclosure relate to the field of display technologies, and in particular, to a display unit, a pixel circuit, a driving method thereof, and a display panel.
  • the light LED (Light Emitting Diode) display technology has gained more and more attention by virtue of its advantages.
  • the micro LED is derived from LED, but it is the same as OLED (Organic Light Emitting Diode), and has the advantage of self-luminescence, but the performance is more optimized than OLED.
  • Micro LEDs have many advantages, such as power saving, high brightness, long life, low power consumption, high luminous efficiency, fast response, and slim size. At present, many companies have studied micro-LED technology.
  • Embodiments of the present disclosure provide a display unit, a pixel circuit, a driving method thereof, and a display panel, which can implement two functions of image display and image acquisition.
  • a display unit comprising: a display pixel unit for displaying an image; and an imaging pixel unit for acquiring an image.
  • the imaging pixel unit includes a photosensitive element and a filter element on the photosensitive element.
  • the photosensitive element comprises a PIN unit.
  • the filter element comprises an electrochromic filter element or a liquid crystal filter Pieces.
  • the electrochromic filter element includes: a first substrate; a second substrate disposed opposite the first substrate; a common electrode between the first substrate and the second substrate a first electrode, a second electrode, and a third electrode between the common electrode and the second substrate, the first, second, and third electrodes being located in the same layer; and at the common electrode and the a first electrochromic material between the first electrodes as a first color filter unit that transmits the first color light, located between the common electrode and the second electrode as a second color light a second electrochromic material of the second color filter unit, a third electrochromic material between the common electrode and the third electrode as a third color filter unit that transmits the third color light.
  • the electrochromic filter element includes: a first substrate; a first lower electrode on the first substrate; and a first color on the first lower electrode a first electrochromic material of the first color filter unit; a first upper electrode on the first electrochromic material; a first protective layer on the first upper electrode; and the first protective layer a second lower electrode; a second electrochromic material on the second lower electrode as a second color filter unit that transmits the second color light; and a second on the second electrochromic material An upper electrode; a second protective layer on the second upper electrode; a third lower electrode on the second protective layer; and a third through the third color light on the third lower electrode a third electrochromic material of the color filter unit; a third upper electrode on the third electrochromic material; and a second substrate on the third upper electrode.
  • the liquid crystal filter element includes: a first substrate; a second substrate disposed opposite the first substrate; and a first color filter between the first substrate and the second substrate a unit, a second color filter unit and a third color filter unit, wherein the first, second and third color filter units are located in the same layer; on the second substrate and the first, second and third color filters a protective layer between the cells; a first electrode, a second electrode, and a third electrode between the second substrate and the protective layer, wherein the first, second, and third electrodes are located on the same layer; a common electrode between the second substrate and the first, second, and third electrodes; and a liquid crystal between the common electrode and the first, second, and third electrodes.
  • the display pixel unit comprises: an LED-based display pixel unit or a liquid crystal-based display pixel unit.
  • a pixel circuit comprising: the display unit described in the first aspect of the present disclosure; a storage capacitor; a data write circuit configured to control a data voltage to be written to the storage a first end of the capacitor; a display control circuit configured to control the display pixel unit in the display unit to display an image; and an imaging control circuit configured to control the imaging pixel in the display unit Unit to capture images.
  • the data writing circuit includes a first transistor, a control electrode of the first transistor is coupled to a scan line, and a first pole of the first transistor is coupled to a data line, the first A second pole of the transistor is coupled to the first end of the storage capacitor.
  • the display control circuit includes a second transistor, a control electrode of the second transistor is coupled to a second end of the storage capacitor, and a first pole of the second transistor and the display pixel The unit is coupled, and the second pole of the second transistor is configured to receive a power voltage.
  • the imaging control circuit includes a third transistor, a control electrode of the third transistor is coupled to the scan line, and a first pole of the third transistor is coupled to the imaging pixel unit.
  • the second pole of the third transistor is coupled to the imaging signal output terminal.
  • the second transistor is of the same type as the first transistor, and the third transistor is of a different type than the first transistor.
  • a method for driving a pixel circuit described in the second aspect of the present disclosure comprising: driving the display control circuit to display an image during a first period of time; The second period of time drives the imaging control circuit to acquire an image.
  • a pixel circuit comprising: the display unit described in the first aspect of the present disclosure; a storage capacitor; a first transistor; a second transistor; and a third transistor, wherein a control electrode of the first transistor is coupled to the scan line, a first pole of the first transistor is coupled to the data line, and a second pole of the first transistor is coupled to the first end of the storage capacitor; a control electrode of the second transistor is coupled to the second end of the storage capacitor, and a first pole of the second transistor is coupled to the display pixel unit in the display unit, the second crystal a second pole of the tube is configured to receive a power supply voltage; a control electrode of the third transistor is coupled to the scan line, and a first pole of the third transistor is coupled to an imaging pixel unit in the display unit, The second pole of the third transistor is coupled to the imaging signal output terminal, wherein the second transistor is of the same type as the first transistor, and the third transistor is different in type from the first transistor.
  • a method for driving a pixel circuit described in the fourth aspect of the present disclosure comprising: inputting a first voltage signal to the scan line for a first period of time Turning on the first transistor and turning off the third transistor, inputting a data signal to the data line to charge the storage capacitor to turn on the second transistor to drive the display pixel unit to emit light; and in the second Inputting a first voltage signal to the scan line to turn on the third transistor and turning off the first and second transistors during a time period, thereby outputting an image signal collected by the imaging pixel unit from the imaging signal output end .
  • the imaging pixel unit asynchronously acquires a first image signal of a first color, a second image signal of a second color, and a third image signal of a third color during the second time period.
  • a display panel comprising a plurality of pixel circuits described in the second or fourth aspect of the present disclosure, wherein an imaging pixel unit of the plurality of pixel circuits is located in a display pixel unit between.
  • a display device including the display panel described in the sixth aspect of the present disclosure.
  • the display device further includes: a filter amplifier for amplifying an image signal from the imaging pixel unit in the display panel; a scan driver and a data driver for driving the display panel; a controller for receiving the image signal from the filter amplifier and transmitting a scan signal and a data signal to the scan driver and the data driver, respectively, and an imaging control signal for controlling the imaging pixel unit Send to the display panel.
  • a filter amplifier for amplifying an image signal from the imaging pixel unit in the display panel
  • a scan driver and a data driver for driving the display panel
  • a controller for receiving the image signal from the filter amplifier and transmitting a scan signal and a data signal to the scan driver and the data driver, respectively, and an imaging control signal for controlling the imaging pixel unit Send to the display panel.
  • a display unit In the embodiments described herein, a display unit, a pixel circuit, and a driver thereof are provided The method and the display panel enable two functions of image display and image acquisition.
  • FIG. 1 is a schematic view schematically showing a cross section of a display unit 10 according to an embodiment of the present disclosure
  • FIG. 2 is a schematic view schematically showing a cross section of an electrochromic filter element 20 according to an embodiment of the present disclosure
  • FIG. 3 is a schematic view schematically showing a cross section of an electrochromic filter element 30 according to an embodiment of the present disclosure
  • FIG. 4 is a schematic view schematically showing a cross section of a liquid crystal filter element 40 according to an embodiment of the present disclosure
  • FIG. 5 is a schematic view schematically showing a pixel circuit 50 according to an embodiment of the present disclosure
  • FIG. 6 is a flow chart of a method of driving a pixel circuit in accordance with an embodiment of the present disclosure
  • FIG. 7 is a detailed flow chart of a method of driving a pixel circuit in accordance with an embodiment of the present disclosure
  • FIG. 8 is a signal timing diagram of a pixel circuit in accordance with an embodiment of the present disclosure.
  • FIG. 9 is a configuration diagram schematically showing a display panel 90 according to an embodiment of the present disclosure.
  • FIG. 10 is a cross-sectional view schematically showing a display panel 90 according to an embodiment of the present disclosure.
  • FIG. 11 is a block diagram schematically showing a display device 110 according to an embodiment of the present disclosure.
  • a display unit is provided that is capable of performing both image display and image capture functions.
  • An exemplary display unit provided by an embodiment of the present disclosure will now be described in detail with reference to FIGS. 1 through 4.
  • FIG. 1 is a schematic view schematically showing a cross section of a display unit 10 according to an embodiment of the present disclosure.
  • the display unit 10 includes a substrate 101, a display pixel unit 102 and an imaging pixel unit 103 on the substrate 101, and a protective layer 104 on the display pixel unit 102 and the imaging pixel unit 103.
  • the display pixel unit 102 is for displaying an image
  • the imaging pixel unit 103 is for acquiring an image.
  • display pixel unit 102 includes an LED-based display pixel unit or a liquid crystal-based display pixel unit.
  • the LED includes micro LED, OLED, liquid crystal LED or inorganic LED.
  • the imaging pixel unit 103 includes a photosensitive element 1031 and a filter element 1032 located on the photosensitive element 1031.
  • the photosensitive element 1031 includes a PIN unit, wherein the PIN unit is used to sense the brightness of the external image and convert the brightness into an electrical signal when the image is acquired.
  • filter element 1032 includes electrochromic filter element 20 (shown in Figure 2), electrochromic filter element 30 (shown in Figure 3), or liquid crystal filter element 40 (e.g. Figure 4).
  • FIG. 2 is a schematic view schematically showing a cross section of an electrochromic filter element 20 according to an embodiment of the present disclosure.
  • the electrochromic filter element 20 includes: a first substrate 201; a second substrate 209 disposed opposite the first substrate 201; a common electrode 202 between the first substrate 201 and the second substrate 209; a first electrode 206, a second electrode 207, and a third electrode 208 between the common electrode 202 and the second substrate 209, the first electrode 206, the second electrode 207, and the third electrode 208 are located in the same layer; and at the common electrode 202 a first electrochromic material 203 as a first color filter unit that transmits the first color light between the first electrode 206 and the first electrode 206 is located between the common electrode 202 and the second electrode 207 as a second color light.
  • the second electrochromic material 204 of the second color filter unit is located between the common electrode 202 and the third electrode 208 as a third electrochromic material 205 that transmits a third color filter unit of the third color light.
  • a black matrix exists between the first electrochromic material 203, the second electrochromic material 204, and the third electrochromic material 205 to prevent crosstalk of light.
  • the first, second, and third color lights may be red light, green light, and blue light, respectively.
  • a voltage is asynchronously applied to the first electrochromic material 203, the second electrochromic material 204, and the third electrochromic material 205, thereby acquiring a red image, a green image, and a blue image asynchronously.
  • FIG. 3 is a schematic view schematically showing a cross section of an electrochromic filter element 30 according to an embodiment of the present disclosure.
  • the electrochromic filter element 30 includes: a first substrate 301; a first lower electrode 302 on the first substrate 301; and a transmission through the first lower electrode 302.
  • a first electrochromic material 303 of a first color filter unit of color light a first upper electrode 304 on the first electrochromic material 303; a first protective layer 305 on the first upper electrode 304; a second lower electrode 306 on a protective layer 305; a second electrochromic material 307 on the second lower electrode 306 as a second color filter unit that transmits the second color light; located in the second electrochromic material 307 a second upper electrode 308; a second protective layer 309 on the second upper electrode 308; a third lower electrode 310 on the second protective layer 309; and a third color on the third lower electrode 310 a third electrochromic material 311 of a third color filter unit of light; a third upper electrode 312 on the third electrochromic material 311; and a second substrate 313 on the third upper electrode 312.
  • the first, second, and third color lights may be red light, green light, and blue light, respectively.
  • a voltage is asynchronously applied to the first electrochromic material 303, the second electrochromic material 307, and the third electrochromic material 311, thereby acquiring a red image, a green image, and a blue image asynchronously.
  • FIG. 4 is a schematic view schematically showing a cross section of a liquid crystal filter element 40 according to an embodiment of the present disclosure.
  • the liquid crystal filter element 40 includes a first substrate 401, a second substrate 411 disposed opposite the first substrate 401, and a first color filter unit 402 between the first substrate 401 and the second substrate 411.
  • the second color filter unit 403 and the third color filter unit 404, the first color filter unit 402, the second color filter unit 403 and the third color filter unit 404 are located in the same layer; the second substrate 411 and the first color filter unit 402, a protective layer 405 between the second color filter unit 403 and the third color filter unit 404; a first electrode 406, a second electrode 407, and a third electrode 408 between the second substrate 411 and the protective layer 405, An electrode 406, a second electrode 407 and a third electrode 408 are located in the same layer; a common electrode 410 between the second substrate 411 and the first electrode 406, the second electrode 407 and the third electrode 408; and the common electrode 410 The liquid crystal 409 between the first electrode 406, the second electrode 407, and the third electrode 408.
  • liquid crystal 409 includes a ferroelectric liquid crystal. It will be appreciated that other types of liquid crystals may also be employed with embodiments of the present disclosure.
  • the first color filter unit 402, the second color filter unit 403, and the The three color filter units 404 are a red pigment, a green pigment, and a blue pigment, respectively.
  • the liquid crystals 409 on the first color filter unit 402, the second color filter unit 403, and the third color filter unit 404 are asynchronously driven to asynchronously filter light of different colors, thereby asynchronously acquiring a red image, a green image, and a blue image.
  • a pixel circuit comprising a display unit as described above to effect image display and image acquisition.
  • An exemplary pixel circuit provided by an embodiment of the present disclosure will now be described in detail with reference to FIG.
  • FIG. 5 is a schematic diagram schematically showing a pixel circuit 50 in accordance with an embodiment of the present disclosure.
  • the pixel circuit 50 includes: a storage capacitor 501; a data write circuit 502 configured to control a data voltage to be written to a first end of the storage capacitor 501; and a display control circuit 503 configured to control the display unit Display pixel unit 102 in 10 to display an image; display pixel unit 102 configured to display an image; imaging control circuit 504 configured to control imaging pixel unit 103 in display unit 10 to acquire an image; and imaging pixel unit 103, used to collect images.
  • the data writing circuit 502 includes a first transistor T1.
  • the control electrode of the first transistor T1 is coupled to the scan line Gm, and the first electrode of the first transistor T1 is coupled to the data line Dn.
  • the second pole of the transistor T1 is coupled to the first end of the storage capacitor 501.
  • the display control circuit 503 includes a second transistor T2, the control electrode of the second transistor T2 is coupled to the second end of the storage capacitor 501, and the first electrode of the second transistor T2 is coupled to the display pixel unit.
  • the second transistor T2 is coupled to receive a power supply voltage.
  • the imaging control circuit 504 includes a third transistor T3.
  • the control electrode of the third transistor T3 is coupled to the scan line Gm, and the first electrode of the third transistor T3 is coupled to the imaging pixel unit 103.
  • the second pole of the transistor T3 is coupled to the imaging signal output terminal DOn.
  • the Bias end in FIG. 5 is a reference voltage signal end corresponding to the photosensitive element 1031 in the imaging pixel unit 103.
  • the reference voltage signal is related to the specific device characteristics of the photosensitive element 1031, and the present disclosure is not particularly limited thereto.
  • the second transistor T2 is of the same type as the first transistor T1, and the T3 third transistor is of a different type than the first transistor T1.
  • the first One transistor T1 and the second transistor T2 are N-type transistors, and the third transistor is a P-type transistor.
  • the first transistor T1 and the second transistor T2 are P-type transistors, and the third transistor is an N-type transistor. It should be noted that the following description is directed to the case where the first transistor T1 and the second transistor T2 are N-type transistors and the third transistor is a P-type transistor.
  • first transistor T1 and the second transistor T2 are P-type transistors and the third transistor is an N-type transistor, it is only necessary to change the voltage of the transistor control electrode to the opposite polarity to achieve the same The function is not repeated here.
  • a driving method for driving the pixel circuit 50 as described above is also provided to achieve image display and image acquisition.
  • a driving method of driving a pixel circuit provided by an embodiment of the present disclosure will now be described in detail with reference to FIGS. 6 through 8.
  • FIG. 6 is a flow chart of a method of driving pixel circuit 50 in accordance with an embodiment of the present disclosure.
  • FIG. 8 is a signal timing diagram of a pixel circuit 50 in accordance with an embodiment of the present disclosure.
  • step S601 the display control circuit 503 is driven to display an image during the first time period t1; and in step S602, the imaging control circuit 504 is driven during the second time period t2. To capture images.
  • FIG. 7 is a specific flow chart of a method of driving a pixel circuit 50 in accordance with an embodiment of the present disclosure.
  • the first voltage signal is a high level signal
  • the first voltage signal is input to the scan line Gm to turn on the first transistor T1 and turn off the first
  • the three transistor T3 inputs a data signal to the data line Dn to charge the storage capacitor 501 to turn on the second transistor T2 to drive the display pixel unit 102 to emit light, thereby causing the display unit 10 to display an image.
  • step S701 in the second time period t2, the first voltage signal is a low level signal, and the first voltage signal is input to the scan line Gm to turn on the third transistor T3 and turn off the first transistor T1 and the second transistor T2,
  • the image signal acquired by the imaging pixel unit 103 is output from the imaging signal output terminal DOn, thereby causing the display unit 10 to acquire an image.
  • the second time period t2 may sequentially include the first sub-period 1, the second sub-period 2, and the third sub-period 3.
  • the first to third sub-periods may be the same or different.
  • the imaging control signal is transmitted to the imaging pixel unit 103 in a time division by a controller (described later).
  • the controller transmits a first imaging control signal to the imaging pixel unit 103 in the first sub-period 1, a second imaging control signal to the imaging pixel unit 103 in the second sub-period 2, and an imaging pixel unit in the third sub-period 3 103 transmits a third imaging control signal.
  • the first image signal of the first color is acquired by the imaging pixel unit 103.
  • the second image signal of the second color is acquired by the imaging display unit 103.
  • the third image signal of the third color is acquired by the imaging display unit 103.
  • the first, second, and third imaging control signals are a red imaging control signal RC, a green imaging control signal GC, and a blue imaging control signal BC, respectively, first, The second and third colors are red, green, and blue, respectively, and the first, second, and third image signals are red, green, and blue image signals, respectively.
  • the embodiment of the present disclosure does not limit the order of image acquisition of different colors, and those skilled in the art can select the acquisition order of images of different colors as needed. Further, as shown in FIG. 8, in the second period t2, the imaging signal output terminal DOn asynchronously outputs red, green, and blue image signals.
  • a display panel including the pixel circuit as described above is also provided.
  • An exemplary display panel provided by an embodiment of the present disclosure will now be described with reference to FIGS. 9 and 10.
  • FIG. 9 is a structural diagram schematically showing a display panel 90 according to an embodiment of the present disclosure.
  • the display panel 90 includes a plurality of pixel circuits 50, a plurality of scanning lines, a plurality of data lines, and a plurality of imaging signal output lines.
  • Each pixel circuit 50 is connected to a corresponding scan line, a corresponding data line, and a corresponding imaging signal output line.
  • FIG. 10 is a cross-sectional view schematically showing a display panel 90 according to an embodiment of the present disclosure.
  • the display panel 90 includes a substrate 101, a display pixel unit 102 and an imaging pixel unit 103 on the substrate 101, and a protective layer 104 on the display pixel unit 102 and the imaging pixel unit 103.
  • the display panel 90 includes a plurality of pixel circuits 50.
  • the plurality of pixel circuits 50 includes a plurality of display units 10.
  • the plurality of display units 10 include a plurality of display pixel units 102 and a plurality of imaging pixel units 103.
  • the imaging pixel unit 103 bits Between the display pixel units 102.
  • FIG. 11 is a block diagram schematically showing a display device 110 according to an embodiment of the present disclosure.
  • the display device 110 includes a display panel 90, a filter amplifier 1101 for amplifying an image signal from the imaging pixel unit 103 in the display panel 90, a scan driver 1102 for driving the display panel 90, and a data driver 1103.
  • a controller 1104 for receiving an image signal from the filter amplifier 1101 and transmitting the scan signals (G1, G2 ... Gm) and the data signals (D1, D2 ... Dn) to the scan driver 1102 and the data driver 1103, respectively, and
  • An imaging control signal for controlling the imaging pixel unit 103 is sent to the display panel 90.
  • the imaging control signal is used to control an imaging pixel unit in the display panel to capture an image.
  • the imaging pixel unit may capture images of different colors, such as red, green, and blue images.
  • the controller 1104, the filter amplifier 1101, the scan driver 1102, and the data driver 1103 included in the display device 110 exist independently of the display panel 90. It will be appreciated that the controller, filter amplifier, scan driver and data driver can also be formed integrally with the display panel.

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Abstract

一种显示单元(10)、像素电路及其驱动方法和显示面板。显示单元(10)包括：用于显示图像的显示像素单元(102)；以及用于采集图像的成像像素单元(103)。成像像素单元(103)包括感光元件(1031)和位于感光元件(1031)上的滤光元件(1032)。

Description

显示单元、像素电路及其驱动方法和显示面板
相关申请的交叉引用
本申请要求于2017年3月31日递交的中国专利申请第201710206868.0号优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及显示技术领域，尤其涉及一种显示单元、像素电路及其驱动方法和显示面板。
背景技术
随着显示技术的不断发展，微LED(Light Emitting Diode)显示技术凭借其优势已得到越来越多的关注。微LED来源于LED，却与OLED(Organic Light Emitting Diode)相同，也具有自发光优势，但性能比OLED更加优化。微LED具有许多优点，如省电、高亮度、长寿命、低功耗、发光效率高、响应速度快、体积轻薄等。目前，已有许多企业对微LED技术进行研究。
发明内容
本公开实施例提供了一种显示单元、像素电路及其驱动方法和显示面板，能够实现图像显示和图像采集两种功能。
在本公开的第一方面中，提供一种显示单元，包括：用于显示图像的显示像素单元；以及用于采集图像的成像像素单元。
在一个实施例中，所述成像像素单元包括感光元件和位于所述感光元件上的滤光元件。
在一个实施例中，所述感光元件包括PIN单元。
在一个实施例中，所述滤光元件包括电致变色滤光元件或液晶滤光元 件。
在一个实施例中，所述电致变色滤光元件包括：第一基板；与所述第一基板相对设置的第二基板；位于所述第一基板与所述第二基板之间的公共电极；位于所述公共电极与所述第二基板之间的第一电极、第二电极和第三电极，所述第一、第二和第三电极位于同一层；以及位于所述公共电极与所述第一电极之间的作为透过第一颜色光的第一滤色单元的第一电致变色材料，位于所述公共电极与所述第二电极之间的作为透过第二颜色光的第二滤色单元的第二电致变色材料，位于所述公共电极与所述第三电极之间的作为透过第三颜色光的第三滤色单元的第三电致变色材料。
在一个实施例中，所述电致变色滤光元件包括：第一基板；位于所述第一基板上的第一下电极；位于所述第一下电极上的作为透过第一颜色光的第一滤色单元的第一电致变色材料；位于所述第一电致变色材料上的第一上电极；位于所述第一上电极上的第一保护层；位于所述第一保护层上的第二下电极；位于所述第二下电极上的作为透过第二颜色光的第二滤色单元的第二电致变色材料；位于所述第二电致变色材料上的第二上电极；位于所述第二上电极上的第二保护层；位于所述第二保护层上的第三下电极；位于所述第三下电极上的作为透过第三颜色光的第三滤色单元的第三电致变色材料；位于所述第三电致变色材料上的第三上电极；以及位于所述第三上电极上的第二基板。
在一个实施例中，所述液晶滤光元件包括：第一基板；与所述第一基板相对设置的第二基板；位于所述第一基板与所述第二基板之间的第一滤色单元、第二滤色单元和第三滤色单元，所述第一、第二和第三滤色单元位于同一层；位于所述第二基板与所述第一、第二和第三滤色单元之间的保护层；位于所述第二基板与所述保护层之间的第一电极、第二电极和第三电极，所述第一、第二和第三电极位于同一层；位于所述第二基板与所述第一、第二和第三电极之间的公共电极；以及位于所述公共电极与所述第一、第二和第三电极之间的液晶。
在一个实施例中，所述显示像素单元包括：基于LED的显示像素单元或基于液晶的显示像素单元。
在本公开的第二方面中，提供一种像素电路，包括：在本公开的第一方面中描述的显示单元；存储电容；数据写入电路，其被配置为控制数据电压写入所述存储电容的第一端；显示控制电路，其被配置为控制所述显示单元中的所述显示像素单元以显示图像；以及成像控制电路，其被配置为控制所述显示单元中的所述成像像素单元以采集图像。
在一个实施例中，所述数据写入电路包括第一晶体管，所述第一晶体管的控制极与扫描线耦接，所述第一晶体管的第一极与数据线耦接，所述第一晶体管的第二极与所述存储电容的第一端耦接。
在一个实施例中，所述显示控制电路包括第二晶体管，所述第二晶体管的控制极与所述存储电容的第二端耦接，所述第二晶体管的第一极与所述显示像素单元耦接，所述第二晶体管的第二极用于接收电源电压。
在一个实施例中，所述成像控制电路包括第三晶体管，所述第三晶体管的控制极与所述扫描线耦接，所述第三晶体管的第一极与所述成像像素单元耦接，所述第三晶体管的第二极与成像信号输出端耦接。
在一个实施例中，所述第二晶体管与所述第一晶体管的类型相同，所述第三晶体管与所述第一晶体管的类型不同。
在本公开的第三方面中，提供一种用于驱动在本公开的第二方面中描述的像素电路的方法，包括：在第一时间段，驱动所述显示控制电路以显示图像；以及在第二时间段，驱动所述成像控制电路以采集图像。
在本公开的第四方面中，提供一种像素电路，包括：在本公开的第一方面中描述的显示单元；存储电容；第一晶体管；第二晶体管；以及第三晶体管，其中，所述第一晶体管的控制极与扫描线耦接，所述第一晶体管的第一极与数据线耦接，所述第一晶体管的第二极与所述存储电容的第一端耦接；所述第二晶体管的控制极与所述存储电容的第二端耦接，所述第二晶体管的第一极与所述显示单元中的显示像素单元耦接，所述第二晶体 管的第二极用于接收电源电压；所述第三晶体管的控制极与所述扫描线耦接，所述第三晶体管的第一极与所述显示单元中的成像像素单元耦接，所述第三晶体管的第二极与成像信号输出端耦接，其中，所述第二晶体管与所述第一晶体管的类型相同，所述第三晶体管与所述第一晶体管的类型不同。
在本公开的第五方面中，提供一种用于驱动在本公开的第四方面中描述的像素电路的方法，包括：在第一时间段内，向所述扫描线输入第一电压信号以开启所述第一晶体管并关闭所述第三晶体管，向所述数据线输入数据信号以对所述存储电容充电从而开启所述第二晶体管，以便驱动所述显示像素单元发光；以及在第二时间段内，向所述扫描线输入第一电压信号以开启所述第三晶体管并关闭所述第一和第二晶体管，从而从所述成像信号输出端输出所述成像像素单元采集的图像信号。
在一个实施例中，在所述第二时间段内，所述成像像素单元异步采集第一颜色的第一图像信号、第二颜色的第二图像信号和第三颜色的第三图像信号。
在本公开的第六方面中，提供一种显示面板，包括多个在本公开的第二或第四方面中描述的像素电路，其中，所述多个像素电路的成像像素单元位于显示像素单元之间。
在本公开的第七方面中，提供一种显示装置，包括在本公开的第六方面中描述的显示面板。
在一个实施例中，所述显示装置还包括：滤波放大器，用于放大来自所述显示面板中的所述成像像素单元的图像信号；用于驱动所述显示面板的扫描驱动器和数据驱动器；以及控制器，用于接收来自所述滤波放大器的所述图像信号并将扫描信号和数据信号分别发送给所述扫描驱动器和所述数据驱动器，以及将用于控制所述成像像素单元的成像控制信号发送给所述显示面板。
在本文描述的实施例中，提供了一种显示单元、像素电路及其驱动方 法和显示面板，能够实现图像显示和图像采集两种功能。
适应性的进一步的方面和范围从本文中提供的描述变得明显。应当理解，本申请的各个方面可以单独或者与一个或多个其他方面组合实施。还应当理解，本文中的描述和特定实施例旨在仅说明的目的并不旨在限制本申请的范围。
附图说明
本文中描述的附图用于仅对所选择的实施例的说明的目的，并不是所有可能的实施方式，并且不旨在限制本申请的范围，其中：
图1是示意性示出根据本公开实施例的显示单元10的截面的示意图；
图2是示意性示出根据本公开实施例的电致变色滤光元件20的截面的示意图；
图3是示意性示出根据本公开实施例的电致变色滤光元件30的截面的示意图；
图4是示意性示出根据本公开实施例的液晶滤光元件40的截面的示意图；
图5是示意性示出根据本公开实施例的像素电路50的示意图；
图6是根据本公开实施例的驱动像素电路的方法的流程图；
图7是根据本公开实施例的驱动像素电路的方法的具体的流程图；
图8是根据本公开实施例的像素电路的信号时序图；
图9是示意性示出根据本公开实施例的显示面板90的结构图；
图10是示意性示出根据本公开实施例的显示面板90的截面图；以及
图11是示意性示出根据本公开实施例的显示装置110的框图。
贯穿这些附图的各个视图，相应的参考编号指示相应的部件或特征。
具体实施方式
首先，需要说明的是，除非上下文中另外明确地指出，否则在本文和 所附权利要求中所使用的词语的单数形式包括复数，反之亦然。因而，当提及单数时，通常包括相应术语的复数。相似地，措辞“包含”和“包括”将解释为包含在内而不是独占性地。同样地，术语“包括”和“或”应当解释为包括在内的，除非本文中明确禁止这样的解释。在本文中使用术语“实例”之处，特别是当其位于一组术语之后时，所述“实例”仅仅是示例性的和阐述性的，且不应当被认为是独占性的或广泛性的。
此外，在附图中，为了清楚起见夸大了各层的厚度及区域。应当理解的是，当提到层、区域、或组件在别的部分“上”时，指其直接位于别的部分上，或者也可能有别的组件介于其间。相反，当某个组件被提到“直接”位于别的组件上时，指并无别的组件介于其间。
另外，还需要说明的是，当介绍本申请的元素及其实施例时，冠词“一”、“一个”、“该”和“所述”旨在表示存在一个或者多个要素；除非另有说明，“多个”的含义是两个或两个以上；用语“包含”、“包括”、“含有”和“具有”旨在包括性的并且表示可以存在除所列要素之外的另外的要素；术语“第一”、“第二”、“第三”等仅用于描述的目的，而不能理解为指示或暗示相对重要性及形成顺序。
现将参照附图更全面地描述示例性的实施例。
在本文描述的实施例中，提供一种显示单元，该显示单元能够实现图像显示和图像采集两种功能。现将参照图1至图4详细地描述本公开实施例提供的示例性显示单元。
图1是示意性示出根据本公开实施例的显示单元10的截面的示意图。如图1所示，显示单元10包括基板101、位于基板101上的显示像素单元102和成像像素单元103、以及位于显示像素单元102和成像像素单元103上的保护层104。显示像素单元102用于显示图像，成像像素单元103用于采集图像。
在一个示例性实施例中，显示像素单元102包括基于LED的显示像素单元或基于液晶的显示像素单元。在一个示例性实施例中，LED包括微 LED、OLED、液晶LED或无机LED等。
在一个示例性实施例中，成像像素单元103包括感光元件1031和位于感光元件1031上的滤光元件1032。
在一个示例性实施例中，感光元件1031包括PIN单元，其中，PIN单元在采集图像时用于感受外部图像的亮度并将亮度转换为电信号。
在一个示例性实施例中，滤光元件1032包括电致变色滤光元件20(如图2所示)、电致变色滤光元件30(如图3所示)或液晶滤光元件40(如图4所示)。
图2是示意性示出根据本公开实施例的电致变色滤光元件20的截面的示意图。如图2所示，电致变色滤光元件20包括：第一基板201；与第一基板201相对设置的第二基板209；位于第一基板201与第二基板209之间的公共电极202；位于公共电极202与第二基板209之间的第一电极206、第二电极207和第三电极208，第一电极206、第二电极207和第三电极208位于同一层；以及位于公共电极202与第一电极206之间的作为透过第一颜色光的第一滤色单元的第一电致变色材料203，位于公共电极202与第二电极207之间的作为透过第二颜色光的第二滤色单元的第二电致变色材料204，位于公共电极202与第三电极208之间的作为透过第三颜色光的第三滤色单元的第三电致变色材料205。在一个示例性实施例中，第一电致变色材料203、第二电致变色材料204和第三电致变色材料205之间存在黑矩阵以防止光的串扰。
在一个示例性实施例中，第一、第二和第三颜色光可以分别为红光、绿光和蓝光。对第一电致变色材料203、第二电致变色材料204和第三电致变色材料205异步施加电压，从而异步采集红色图像、绿色图像和蓝色图像。
图3是示意性示出根据本公开的实施例的电致变色滤光元件30的截面的示意图。如图3所示，电致变色滤光元件30包括：第一基板301；位于第一基板301上的第一下电极302；位于第一下电极302上的作为透过第 一颜色光的第一滤色单元的第一电致变色材料303；位于第一电致变色材料303上的第一上电极304；位于第一上电极304上的第一保护层305；位于第一保护层305上的第二下电极306；位于第二下电极306上的作为透过第二颜色光的第二滤色单元的第二电致变色材料307；位于第二电致变色材料307上的第二上电极308；位于第二上电极308上的第二保护层309；位于第二保护层309上的第三下电极310；位于第三下电极310上的作为透过第三颜色光的第三滤色单元的第三电致变色材料311；位于第三电致变色材料311上的第三上电极312；以及位于第三上电极312上的第二基板313。
在一个示例性实施例中，第一、第二和第三颜色光可以分别为红光、绿光和蓝光。对第一电致变色材料303、第二电致变色材料307和第三电致变色材料311异步施加电压，从而异步采集红色图像、绿色图像和蓝色图像。
图4是示意性示出根据本公开实施例的液晶滤光元件40的截面的示意图。如图4所示，液晶滤光元件40包括：第一基板401；与第一基板401相对设置的第二基板411；位于第一基板401与第二基板411之间的第一滤色单元402、第二滤色单元403和第三滤色单元404，第一滤色单元402、第二滤色单元403和第三滤色单元404位于同一层；位于第二基板411与第一滤色单元402、第二滤色单元403和第三滤色单元404之间的保护层405；位于第二基板411与保护层405之间的第一电极406、第二电极407和第三电极408，第一电极406、第二电极407和第三电极408位于同一层；位于第二基板411与第一电极406、第二电极407和第三电极408之间的公共电极410；以及位于公共电极410与第一电极406、第二电极407和第三电极408之间的液晶409。
在一个示例性实施例中，液晶409包括铁电液晶。可以理解，本公开的实施例也可以采用其他类型的液晶。
在一个示例性实施例中，第一滤色单元402、第二滤色单元403和第 三滤色单元404分别为红色颜料、绿色颜料和蓝色颜料。对第一滤色单元402、第二滤色单元403和第三滤色单元404上的液晶409进行异步驱动而异步滤过不同颜色的光，从而异步采集红色图像、绿色图像和蓝色图像。
在本文描述的实施例中，还提供一种像素电路，其包括如上所述的显示单元，从而实现图像显示和图像采集。现将参照图5详细地描述本公开实施例提供的示例性像素电路。
图5是示意性示出根据本公开实施例的像素电路50的示意图。如图5所示，像素电路50包括：存储电容501；数据写入电路502，其被配置为控制数据电压写入存储电容501的第一端；显示控制电路503，其被配置为控制显示单元10中的显示像素单元102以显示图像；显示像素单元102，其被配置为显示图像；成像控制电路504，其被配置为控制显示单元10中的成像像素单元103以采集图像；以及成像像素单元103，用于采集图像。
在一个示例性实施例中，数据写入电路502包括第一晶体管T1，第一晶体管T1的控制极与扫描线Gm耦接，第一晶体管T1的第一极与数据线Dn耦接，第一晶体管T1的第二极与存储电容501的第一端耦接。
在一个示例性实施例中，显示控制电路503包括第二晶体管T2，所述第二晶体管T2的控制极与存储电容501的第二端耦接，第二晶体管T2的第一极与显示像素单元102耦接，第二晶体管T2的第二极用于接收电源电压。
在一个示例性实施例中，成像控制电路504包括第三晶体管T3，第三晶体管T3的控制极与扫描线Gm耦接，第三晶体管T3的第一极与成像像素单元103耦接，第三晶体管T3的第二极与成像信号输出端DOn耦接。
在一个示例性实施例中，图5中的Bias端为与成像像素单元103中的感光元件1031对应的参考电压信号端。该参考电压信号与感光元件1031的具体器件特性相关，本公开对此没有特别的限定。
在一个示例性实施例中，第二晶体管T2与第一晶体管T1的类型相同，T3第三晶体管与第一晶体管T1的类型不同。在一个示例性实施例中，第 一晶体管T1和第二晶体管T2为N型晶体管，第三晶体管为P型晶体管。在另一个示例性实施例中，第一晶体管T1和第二晶体管T2为P型晶体管，第三晶体管为N型晶体管。应注意，下面的描述针对于第一晶体管T1和第二晶体管T2为N型晶体管且第三晶体管为P型晶体管的情况。本领域技术人员可以理解，对于第一晶体管T1和第二晶体管T2为P型晶体管且第三晶体管为N型晶体管的情况，只需将晶体管控制极的电压改变为相反的极性便能实现相同的功能，在此不再赘述。
在本文描述的实施例中，还提供一种用于驱动如上所述的像素电路50的驱动方法，以实现图像显示和图像采集。现将参照图6至图8详细地描述本公开实施例提供的驱动像素电路的驱动方法。
图6是根据本公开实施例的驱动像素电路50的方法的流程图。图8是根据本公开的实施例的像素电路50的信号时序图。如图6和图8所示，在步骤S601中，在第一时间段t1内，驱动显示控制电路503以显示图像；以及在步骤S602中，在第二时间段t2内，驱动成像控制电路504以采集图像。
图7是根据本公开实施例的驱动像素电路50的方法的具体的流程图。如图7和图8所示，在步骤S701中，在第一时间段t1内，第一电压信号为高电平信号，向扫描线Gm输入第一电压信号以开启第一晶体管T1并关闭第三晶体管T3，向数据线Dn输入数据信号以对存储电容501充电从而开启第二晶体管T2，以便驱动显示像素单元102发光，由此使显示单元10显示图像。
在步骤S701中，在第二时间段t2内，第一电压信号为低电平信号，向扫描线Gm输入第一电压信号以开启第三晶体管T3并关闭第一晶体管T1和第二晶体管T2，以便从成像信号输出端DOn输出成像像素单元103采集的图像信号，由此使显示单元10采集图像。
在一个示例性实施例中，如图8所示，第二时间段t2可以依次包括第一子时段1、第二子时段2和第三子时段3。本领域技术人员可以理解，第 一至第三子时段可以相同或不同。在一个示例性实施例中，通过控制器(稍后描述)分时向成像像素单元103发送成像控制信号。例如，控制器在第一子时段1内向成像像素单元103发送第一成像控制信号、在第二子时段2内向成像像素单元103发送第二成像控制信号、在第三子时段3内向成像像素单元103发送第三成像控制信号。由此，在第一子时段1内，通过成像像素单元103采集第一颜色的第一图像信号。在第二子时段2内，通过成像显示单元103采集第二颜色的第二图像信号。在第三子时段3内，通过成像显示单元103采集第三颜色的第三图像信号。在一个示例性实施例中，如图8所示，第一、第二和第三成像控制信号分别为红色成像控制信号RC、绿色成像控制信号GC和蓝色成像控制信号BC，第一、第二和第三颜色分别为红色、绿色和蓝色，第一、第二和第三图像信号分别为红色、绿色和蓝色图像信号。然而，本公开的实施例对不同颜色图像采集的顺序没有限定，本领域技术人员可以根据需要选择不同颜色图像的采集顺序。此外，如图8所示，在第二时间段t2内，成像信号输出端DOn异步输出红色、绿色和蓝色图像信号。
在本文描述的实施例中，还提供一种包括如上所述像素电路的显示面板。现将参照图9和图10描述本公开的实施例提供的示例性显示面板。
图9是示意性示出根据本公开实施例的显示面板90的结构图。如图9所示，显示面板90包括多个像素电路50、多条扫描线、多条数据线以及多条成像信号输出线。每个像素电路50被连接到对应的扫描线、对应的数据线和对应的成像信号输出线。
图10是示意性示出根据本公开实施例的显示面板90的截面图。如图10所示，显示面板90包括基板101、位于基板101上的显示像素单元102和成像像素单元103、以及位于显示像素单元102和成像像素单元103上的保护层104。如上所述，显示面板90包括多个像素电路50。多个像素电路50包括多个显示单元10。多个显示单元10包括多个显示像素单元102和多个成像像素单元103。在一个示例性实施例中，成像像素单元103位 于显示像素单元102之间。
在本文描述的实施例中，还提供一种包括如上所述显示面板的显示装置。现将参照图11详细地描述本公开实施例提供的示例性显示装置。
图11是示意性示出根据本公开实施例的显示装置110的框图。如图11所示，显示装置110包括：显示面板90；滤波放大器1101，用于放大来自显示面板90中的成像像素单元103的图像信号；用于驱动显示面板90的扫描驱动器1102和数据驱动器1103；以及控制器1104，用于接收来自滤波放大器1101的图像信号并将扫描信号(G1、G2…Gm)和数据信号(D1、D2…Dn)分别发送给扫描驱动器1102和数据驱动器1103，以及将用于控制成像像素单元103的成像控制信号发送给显示面板90。该成像控制信号用于控制显示面板中的成像像素单元采集图像。在一个示例性实施例中，成像像素单元可以采集不同颜色的图像，例如，红色、绿色和蓝色图像。
作为一个示例，显示装置110中包括的控制器1104、滤波放大器1101、扫描驱动器1102和数据驱动器1103是独立于显示面板90而存在。可以理解的是，控制器、滤波放大器、扫描驱动器和数据驱动器也可以与显示面板一体形成。
以上为了说明和描述的目的提供了实施例的前述描述。其并不旨在是穷举的或者限制本申请。特定实施例的各个元件或特征通常不限于特定的实施例，但是，在合适的情况下，这些元件和特征是可互换的并且可用在所选择的实施例中，即使没有具体示出或描述。同样也可以以许多方式来改变。这种改变不能被认为脱离了本申请，并且所有这些修改都包含在本申请的范围内。

Claims (17)

  1. 一种显示单元，包括：
    用于显示图像的显示像素单元；以及
    用于采集图像的成像像素单元。
  2. 根据权利要求1所述的显示单元，其中，所述成像像素单元包括感光元件和位于所述感光元件上的滤光元件。
  3. 根据权利要求2所述的显示单元，其中，所述感光元件包括PIN单元。
  4. 根据权利要求2所述的显示单元，其中，所述滤光元件包括电致变色滤光元件或液晶滤光元件。
  5. 根据权利要求4所述的显示单元，其中，所述电致变色滤光元件包括：第一基板；与所述第一基板相对设置的第二基板；位于所述第一基板与所述第二基板之间的公共电极；位于所述公共电极与所述第二基板之间的第一电极、第二电极和第三电极，所述第一、第二和第三电极位于同一层；以及位于所述公共电极与所述第一电极之间的作为透过第一颜色光的第一滤色单元的第一电致变色材料，位于所述公共电极与所述第二电极之间的作为透过第二颜色光的第二滤色单元的第二电致变色材料，位于所述公共电极与所述第三电极之间的作为透过第三颜色光的第三滤色单元的第三电致变色材料。
  6. 根据权利要求4所述的显示单元，其中，所述电致变色滤光元件包括：第一基板；位于所述第一基板上的第一下电极；位于所述第一下电极上的作为透过第一颜色光的第一滤色单元的第一电致变色材料；位于所述第一电致变色材料上的第一上电极；位于所述第一上电极上的第一保护层；位于所述第一保护层上的第二下电极；位于所述第二下电极上的作为透过第二颜色光的第二滤色单元的第二电致变色材料；位于所述第二电致变色材料上的第二上电极；位于所述第二上电极上的第二保护层；位于所述第二保护层上的第三下电极；位于所述第三下电极上的作为透过第三颜色光的第三滤色单元的第三电致变色材料；位于所述第三电致变色材料上的第 三上电极；以及位于所述第三上电极上的第二基板。
  7. 根据权利要求4所述的显示单元，其中，所述液晶滤光元件包括：第一基板；与所述第一基板相对设置的第二基板；位于所述第一基板与所述第二基板之间的第一滤色单元、第二滤色单元和第三滤色单元，所述第一、第二和第三滤色单元位于同一层；位于所述第二基板与所述第一、第二和第三滤色单元之间的保护层；位于所述第二基板与所述保护层之间的第一电极、第二电极和第三电极，所述第一、第二和第三电极位于同一层；位于所述第二基板与所述第一、第二和第三电极之间的公共电极；以及位于所述公共电极与所述第一、第二和第三电极之间的液晶。
  8. 根据权利要求1所述的显示单元，其中，所述显示像素单元包括：基于LED的显示像素单元或基于液晶的显示像素单元。
  9. 一种像素电路，包括：
    根据权利要求1至8中任一项所述的显示单元；
    存储电容；
    数据写入电路，其被配置为控制数据电压写入所述存储电容的第一端；
    显示控制电路，其被配置为控制所述显示单元中的所述显示像素单元以显示图像；以及
    成像控制电路，其被配置为控制所述显示单元中的所述成像像素单元以采集图像。
  10. 根据权利要求9所述的像素电路，其中，所述数据写入电路包括第一晶体管，所述第一晶体管的控制极与扫描线耦接，所述第一晶体管的第一极与数据线耦接，所述第一晶体管的第二极与所述存储电容的第一端耦接。
  11. 根据权利要求10所述的像素电路，其中，所述显示控制电路包括第二晶体管，所述第二晶体管的控制极与所述存储电容的第二端耦接，所述第二晶体管的第一极与所述显示像素单元耦接，所述第二晶体管的第二极用于接收电源电压。
  12. 根据权利要求11所述的像素电路，其中，所述成像控制电路包括第三晶体管，所述第三晶体管的控制极与所述扫描线耦接，所述第三晶体管的第一极与所述成像像素单元耦接，所述第三晶体管的第二极与成像信号输出端耦接，其中，所述第二晶体管与所述第一晶体管的类型相同，所述第三晶体管与所述第一晶体管的类型不同。
  13. 一种用于驱动根据权利要求9至12中任一项所述的像素电路的方法，包括：
    在第一时间段，驱动所述显示控制电路以显示图像；以及
    在第二时间段，驱动所述成像控制电路以采集图像。
  14. 一种像素电路，包括：根据权利要求1至8中任一项所述的显示单元；存储电容；第一晶体管；第二晶体管；以及第三晶体管，
    其中，所述第一晶体管的控制极与扫描线耦接，所述第一晶体管的第一极与数据线耦接，所述第一晶体管的第二极与所述存储电容的第一端耦接；所述第二晶体管的控制极与所述存储电容的第二端耦接，所述第二晶体管的第一极与所述显示单元中的显示像素单元耦接，所述第二晶体管的第二极用于接收电源电压；所述第三晶体管的控制极与所述扫描线耦接，所述第三晶体管的第一极与所述显示单元中的成像像素单元耦接，所述第三晶体管的第二极与成像信号输出端耦接，
    其中，所述第二晶体管与所述第一晶体管的类型相同，所述第三晶体管与所述第一晶体管的类型不同。
  15. 一种用于驱动根据权利要求14所述的像素电路的方法，包括：
    在第一时间段内，向所述扫描线输入第一电压信号以开启所述第一晶体管并关闭所述第三晶体管，向所述数据线输入数据信号以对所述存储电容充电从而开启所述第二晶体管，以便驱动所述显示像素单元发光；以及
    在第二时间段内，向所述扫描线输入第一电压信号以开启所述第三晶体管并关闭所述第一和第二晶体管，从而从所述成像信号输出端输出所述成像像素单元采集的图像信号。
  16. 根据权利要求15所述的方法，其中，在所述第二时间段内，所述成像像素单元异步采集第一颜色的第一图像信号、第二颜色的第二图像信号和第三颜色的第三图像信号。
  17. 一种显示面板，包括多个根据权利要求9至12、14中任一项所述的像素电路，
    其中，所述多个像素电路的成像像素单元位于显示像素单元之间。
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