WO2017206270A1 - 微机电光阀、显示屏和显示装置 - Google Patents

微机电光阀、显示屏和显示装置 Download PDF

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Publication number
WO2017206270A1
WO2017206270A1 PCT/CN2016/089604 CN2016089604W WO2017206270A1 WO 2017206270 A1 WO2017206270 A1 WO 2017206270A1 CN 2016089604 W CN2016089604 W CN 2016089604W WO 2017206270 A1 WO2017206270 A1 WO 2017206270A1
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Prior art keywords
grating
circuit
display screen
fixed
fixed grating
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French (fr)
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徐向阳
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US15/115,894 priority Critical patent/US20180164578A1/en
Publication of WO2017206270A1 publication Critical patent/WO2017206270A1/zh
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G02B26/023—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light comprising movable attenuating elements, e.g. neutral density filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/003—Light absorbing elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a micro electromechanical light valve, a display screen, and a display device.
  • AMOLED As a new generation of display technology, AMOLED has been favored by the market because of its low power consumption, high color gamut, high brightness, high resolution, wide viewing angle, and high response speed.
  • TFT LCD In the case where the brightness is controlled by voltage, as long as the accuracy of the pixel voltage is controlled to several millivolts, the unevenness can be limited to the required range of about ⁇ 1%. This is easy to achieve because in TFT In the LCD, the pixel TFT does not need to convert the transmitted signal voltage, and is only used as a switch for transmitting the signal voltage directly from the data line to the pixel.
  • AMOLED the brightness is flowed through the OLED. The current itself determines that the non-uniformity is still controlled within a range of about ⁇ 1%, which means that the current of the OLED is required to be controlled at about ⁇ 1%. In the range.
  • FIG. 1 is a traditional 2T1C AMOLED current driven circuit diagram.
  • the threshold voltage and channel mobility of LTPS TFTs for AM-OLED are not uniform enough in spatial distribution, a-Si for AMOLED
  • the threshold voltage and mobility of TFTs shift with time, and these disadvantages can cause unevenness and instability of display brightness.
  • FIG. 2 is a schematic diagram of a pixel structure of a panel in the prior art, showing a pixel region 31 and a driving circuit region 32.
  • the invention provides a micro electromechanical light valve, a display screen and a display device, which can solve the problem that the driving circuit existing in the prior art is complicated and the opening ratio of the display screen is low.
  • a technical solution adopted by the present invention is to provide a micro electromechanical light valve comprising a fixed grating and a movable grating, the fixed grating being fixed on a substrate; the movable grating setting Above the fixed grating and parallel to the fixed grating, and displaceable relative to the fixed grating in a plane in which the movable grating is located to adjust the fixed grating and the movable grating The size of the slit that passes through the light.
  • a display screen including a substrate, a backlight, a fixed grating, and a movable grating, and the backlight is disposed on the substrate.
  • the fixed grating is disposed on the backlight panel;
  • the movable grating is disposed above the fixed grating and parallel to the fixed grating, and is opposite to the plane in which the movable grating is located.
  • Displacement of the fixed grating to adjust a size of a slit between the fixed grating and the movable grating for transmitting light emitted by the backlight, thereby displaying a bright state and a dark state of the display screen Make the conversion.
  • the slit of the fixed grating and the slit of the movable grating extend in the same direction.
  • the backlight board is an OLED light-emitting back board.
  • the OLED light-emitting backplane includes an R pixel, a G pixel, and a B pixel, and the R pixel, the G pixel, and the B pixel are distributed in a strip shape.
  • the R pixel is driven by an R circuit
  • the G pixel is driven by a G circuit
  • the B pixel is driven by a B circuit
  • the R circuit, the G circuit, and the B circuit are independent of each other.
  • the R circuit, the G circuit and the B circuit are all disposed on one side of the OLED light-emitting backplane.
  • the backlight board is further covered with an encapsulation layer to protect the light emitting device on the backlight board.
  • another technical solution adopted by the present invention is to provide a display device including the above display screen.
  • the present invention adjusts the slit between the fixed grating and the movable grating by moving the movable grating by providing a fixed grating and a movable grating on the backlight.
  • the size of the light so that the amount of light transmitted through the slit changes, the conversion of the display screen between the dark state and the bright state can be realized, and the display screen can be darkened by the cooperation of the fixed grating and the movable grating.
  • the transition between the state and the bright state maintains the uniformity and stability of the display brightness without adding a compensation circuit, thereby simplifying the driving circuit and increasing the pixel aperture ratio.
  • Figure 1 is a circuit diagram of a conventional 2T1C AMOLED current drive
  • FIG. 2 is a schematic diagram of a pixel structure of a panel in the prior art
  • FIG. 3 is a schematic cross-sectional structural view of an embodiment of a display screen of the present invention.
  • FIG. 4 is a schematic structural view of a pixel in an embodiment of a display screen according to the present invention.
  • Figure 5 is a schematic view showing an embodiment of a driving circuit of the display screen of the present invention.
  • Fig. 6 is a schematic structural view of an embodiment of a display device of the present invention.
  • FIG. 3 is a schematic cross-sectional view of an embodiment of the display screen of the present invention.
  • the present invention provides a display screen including a substrate 11, a backlight 12, a fixed grating 13, and a movable grating 14.
  • the backlight 12 is disposed on the substrate 11.
  • a fixed grating 13 is disposed on the backlight panel 12.
  • the movable grating 14 is disposed above the fixed grating 13 and parallel to the fixed grating 13 and is displaceable relative to the fixed grating 13 in a plane in which the movable grating 14 is located, ie 3, the movable grating 14 moves left and right in the horizontal direction, and the distance between the fixed grating 13 and the movable grating 14 does not change in the vertical direction.
  • the size of the slit between the fixed grating 13 and the movable grating 14 for transmitting light emitted by the backlight 12 is adjusted to convert the bright state and the dark state of the display screen.
  • the fixed grating 13 and the movable grating 14 carry a different kind of electric charge, so that an electrostatic force is generated between the fixed grating 13 and the movable grating 14, Under the action of the electrostatic force, the movable grating 14 is formed with a relative displacement with the fixed grating 13 located underneath, so that the RGB backlight transmitted through the fixed grating 13 can selectively pass through the movable grating 14 to realize the darkness of the light valve.
  • the present invention adjusts the size of the slit between the fixed grating 13 and the movable grating 14 by the movement of the movable grating 14 by providing the fixed grating 13 and the movable grating 14 on the backlight panel 12. Therefore, the amount of light transmitted through the slit is changed, and the conversion between the dark state and the bright state of the display screen can be realized. Since the present invention achieves the display state in the dark state by the cooperation of the fixed grating 13 and the movable grating 14 The conversion between the bright state and the bright state maintains the uniformity and stability of the display brightness without adding a compensation circuit, thereby simplifying the driving circuit and increasing the pixel aperture ratio.
  • the backlight 12 is further covered with an encapsulation layer 15 to protect the light-emitting device on the backlight 12, and the fixed grating 13 is fixed on the encapsulation layer 15.
  • the slits of the fixed grating 13 and the movable grating 14 extend in the same direction.
  • the slits of the fixed grating 13 and the movable grating 14 described in Fig. 3 are all perpendicular to the plane of the paper.
  • the backlight 12 is an OLED light-emitting backplane.
  • the light source is an OLED point light source.
  • the OLED light-emitting backplane includes an R pixel, a G pixel, and a B pixel, and the R pixel, the G pixel, and the B pixel are distributed in a strip shape.
  • FIG. 4 is a schematic diagram of a pixel structure in an embodiment of a display screen according to the present invention.
  • the RGB pixels of each row are arranged in RGBRGB manner, so the pixels of each column are the same, and are all R pixels, or G pixels, or B pixels, so that R pixels, G pixels, and B pixels are both Distributed in strips.
  • adjacent pixels are separated by a pixel defining layer 16.
  • the R pixel is driven by an R circuit that is driven by a G circuit that is driven by a B circuit,
  • the R circuit, the G circuit, and the B circuit are independent of each other. Therefore, the overall luminance of the R pixel can be adjusted by the R circuit, the overall luminance of the G pixel can be adjusted by the G circuit, and the overall luminance of the B pixel can be adjusted by the B circuit.
  • FIG. 5 is a schematic diagram of an embodiment of a driving circuit of a display screen of the present invention. Further, since the R pixel, the G pixel, and the B pixel are distributed in a strip shape, the driving circuit is further simplified.
  • the microelectromechanical light valve includes a fixed grating 13 and a movable grating 14.
  • the fixed grating 13 is fixed on a substrate.
  • the fixed grating 13 in FIG. 3 is fixed on the backlight 12.
  • a movable grating 14 is disposed above the fixed grating 13 and is displaceable relative to the fixed grating 13 in a plane in which the movable grating 14 is located to adjust the fixed grating 13 and the movable
  • the slits of the fixed grating 13 and the movable grating 14 extend in the same direction.
  • the slits of the fixed grating 13 and the movable grating 14 described in Fig. 3 are all perpendicular to the plane of the paper.
  • FIG. 6 is a schematic structural diagram of an embodiment of a display device according to the present invention.
  • the present invention also provides a display device including an outer frame 20 and a display screen 10.
  • the display screen 10 includes a substrate 11, a backlight 12, a fixed grating 13, and a movable grating 14.
  • the backlight 12 is disposed on the substrate 11.
  • a fixed grating 13 is disposed on the backlight panel 12.
  • the movable grating 14 is disposed above the fixed grating 13 and parallel to the fixed grating 13 and is displaceable relative to the fixed grating 13 in a plane in which the movable grating 14 is located, ie 3, the movable grating 14 moves left and right in the horizontal direction, and the distance between the fixed grating 13 and the movable grating 14 does not change in the vertical direction.
  • the size of the slit between the fixed grating 13 and the movable grating 14 for transmitting light emitted by the backlight 12 is adjusted to convert the bright state and the dark state of the display screen.
  • the fixed grating 13 and the movable grating 14 carry a different kind of electric charge, so that an electrostatic force is generated between the fixed grating 13 and the movable grating 14, Under the action of the electrostatic force, the movable grating 14 is formed with a relative displacement with the fixed grating 13 located underneath, so that the RGB backlight transmitted through the fixed grating 13 can selectively pass through the movable grating 14 to realize the darkness of the light valve.
  • the present invention can maintain the uniformity and stability of the brightness of the display screen while realizing the conversion between the dark state and the bright state of the display screen, and also simplifies the driving circuit and improves the pixel aperture ratio.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

一种微机电光阀、显示屏和显示装置，该微机电光阀包括固定光栅（13）和可移动光栅（14），固定光栅（13）固定在一基板上；可移动光栅（14）设置在固定光栅（13）之上且平行于固定光栅（13），并可在可移动光栅（14）所在的平面内相对于固定光栅（13）发生位移，以调整固定光栅（13）和可移动光栅（14）之间的、供光透过的狭缝的大小。该显示屏能在实现显示屏在暗态和亮态之间的转换的同时维护显示屏亮度的均匀性和稳定性，同时还简化了驱动电路，提高了像素开口率。

Description

微机电光阀、显示屏和显示装置
【技术领域】
本发明涉及显示技术领域，特别是涉及一种微机电光阀、显示屏和显示装置。
【背景技术】
作为新一代显示技术，AMOLED具有低功耗、高色域、高亮度、高分辨率、宽视角、高响应速度等优点，因此备受市场的青睐。
在TFT LCD 中，亮度是由电压控制的，只要将像素电压的精度控制到几个毫伏，就可以限制不均匀性在所需要的约±1％范围内。这是容易达到的，因为在TFT LCD中，像素TFT不需要对所传送的信号电压进行变换，只用作将信号电压直接从数据线传送到像素上的开关。而在AMOLED中，亮度是由流过OLED 自身的电流决定的，仍然要求将不均匀性控制在约±1％ 的范围内，这意味着要求将OLED的电流控制在约±1％ 的范围内。由于大部分已有的IC电路都只传输电压信号，而不是电流信号，所以AMOLED像素要完成一个困难的任务，即将电压信号转变为电流信号，然后将这个转变结果在一帧的周期内储存在像素内。实际的AMOLED像素发展过程证明，这是一个很难完成的任务。如图1所示，图1是传统的2T1C AMOLED电流驱动的电路图。用于AM-OLED的LTPS TFTs的阈值电压和沟道迁移率在空间分布上是不够均匀的，用于AMOLED的a-Si TFTs的阈值电压和迁移率会随时间偏移，这些缺点会造成显示屏亮度的不均匀性和不稳定性。为此，需要引入各种像素补偿电路，使显示屏发光亮度的均匀性和稳定性符合商品要求，但是，引入像素补偿电路后，AMOLED的驱动电路较为复杂，导致显示屏的开口率较低，如图2所示，图2是现有技术中的面板的像素结构示意图，显示了像素区31和驱动电路区32。
【发明内容】
本发明提供一种微机电光阀、显示屏和显示装置，能够解决现有技术存在的驱动电路复杂导致显示屏开口率低的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种微机电光阀，该微机电光阀包括固定光栅和可移动光栅，所述固定光栅固定在一基板上；所述可移动光栅设置在所述固定光栅之上且平行于所述固定光栅，并可在所述可移动光栅所在的平面内相对于所述固定光栅的发生位移，以调整所述固定光栅和所述可移动光栅之间的、供光透过的狭缝的大小。
其中，所述固定光栅和所述可移动光栅的狭缝的延伸方向相同。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种显示屏，该显示屏包括衬底、背光板、固定光栅和可移动光栅，所述背光板设置在所述衬底上；所述固定光栅设置在所述背光板上；所述可移动光栅设置在所述固定光栅之上且平行于所述固定光栅，并可在所述可移动光栅所在的平面内相对于所述固定光栅的发生位移，以调整所述固定光栅和所述可移动光栅之间的、供所述背光板发出的光透过的狭缝的大小，从而对所述显示屏的亮态和暗态进行转换。
其中，所述固定光栅的狭缝和所述可移动光栅的狭缝的延伸方向相同。
其中，所述背光板为OLED发光背板。
其中，所述OLED发光背板包括R像素、G像素和B像素，所述R像素、所述G像素和所述B像素均呈条状分布。
其中，所述R像素通过R电路驱动，所述G像素通过G电路驱动，所述B像素通过B电路驱动，所述 R电路、G电路和B电路相互独立。
其中，所述R电路、G电路和B电路均设置在所述OLED发光背板的一侧。
其中，所述背光板上还覆盖有封装层，以保护所述背光板上的发光器件。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种显示装置，该显示装置包括上述显示屏。
本发明的有益效果是：区别于现有技术的情况，本发明通过在背光板之上设置固定光栅和可移动光栅，通过可移动光栅的移动来调整固定光栅和可移动光栅之间的狭缝的大小，从而使得从狭缝中透过的光量发生变化，能实现显示屏在暗态和亮态之间的转换，由于本发明通过固定光栅和可移动光栅的配合即可实现显示屏在暗态和亮态之间的转换，维护显示屏亮度的均匀性和稳定性，无需增设补偿电路等，从而简化了驱动电路，提高了像素开口率。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是传统的2T1C AMOLED电流驱动的电路图；
图2是现有技术中的面板的像素结构示意图；
图3是本发明显示屏实施例的截面结构示意图；
图4是本发明显示屏实施例中的像素结构示意图；
图5是本发明显示屏的驱动电路实施例的示意图；
图6是本发明显示装置实施例的结构示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图3，图3是本发明显示屏实施例的截面结构示意图。
本发明提供了一种显示屏，该显示屏包括衬底11、背光板12、固定光栅13和可移动光栅14。
其中，背光板12设置在所述衬底11上。
固定光栅13设置在所述背光板12上。
所述可移动光栅14设置在所述固定光栅13之上且平行于所述固定光栅13，并可在所述可移动光栅14所在的平面内相对于所述固定光栅13的发生位移，即如图3，可移动光栅14在水平方向发生左右移动，在竖直方向上，固定光栅13和可移动光栅14的距离不变。以调整所述固定光栅13和所述可移动光栅14之间的、供所述背光板12发出的光透过的狭缝的大小，从而对所述显示屏的亮态和暗态进行转换。
具体而言，当固定光栅13和可移动光栅14之间具有电位差的时候，固定光栅13和可移动光栅14带有异种电荷，使得固定光栅13和可移动光栅14之间产生静电力，在静电力的作用下，可移动光栅14与位于其下方的固定光栅13形成有相对位移，进而使得透过固定光栅13的RGB背光可以有选择性地透过可移动光栅14，实现光阀的暗态和亮态之间的转换。
区别于现有技术，本发明通过在背光板12之上设置固定光栅13和可移动光栅14，通过可移动光栅14的移动来调整固定光栅13和可移动光栅14之间的狭缝的大小，从而使得从狭缝中透过的光量发生变化，能实现显示屏在暗态和亮态之间的转换，由于本发明通过固定光栅13和可移动光栅14的配合即可实现显示屏在暗态和亮态之间的转换，维护显示屏亮度的均匀性和稳定性，无需增设补偿电路等，从而简化了驱动电路，提高了像素开口率。
本实施例中，背光板12上还覆盖有封装层15，以保护所述背光板12上的发光器件，固定光栅13则固定在该封装层15上。
具体地，固定光栅13和所述可移动光栅14的狭缝的延伸方向相同。例如，图3中所述的固定光栅13和可移动光栅14的狭缝均为垂直于纸面的方向。
本实施例中，背光板12为OLED发光背板。光源即为OLED点光源。其中，OLED发光背板包括R像素、G像素和B像素，所述R像素、G像素和B像素均呈条状分布。如图4所示，图4是本发明显示屏实施例中的像素结构示意图。例如，像素排列结构中，每一行的RGB像素均以R-G-B-R-G-B的方式排列，所以每一列的像素均相同，都为R像素，或者G像素，或者B像素，使得R像素、G像素和B像素均呈条状分布。
请继续参阅图3，本实施例中，相邻的像素之间通过像素界定层16隔开。
R像素通过R电路驱动，所述G像素通过G电路驱动，所述B像素通过B电路驱动，所述 R电路、G电路和B电路相互独立。因此，可以通过R电路调整R像素的整体亮度，通过G电路调整G像素的整体亮度，通过B电路调整B像素的整体亮度。
通过固定光栅13和可移动光栅14的配合，可以简化驱动电路，使得该驱动电路可以设置在背光板12的侧边上，如图4中，R电路、G电路和B电路均设置在所述OLED发光背板的一侧。而不会影响像素开口率。如图5所示，图5是本发明显示屏的驱动电路实施例的示意图。再由于R像素、G像素和B像素均呈条状分布的分布方式，进一步简化了驱动电路。
本发明还提供了一种微机电光阀，请继续参阅图3，该微机电光阀包括固定光栅13和可移动光栅14。其中，固定光栅13固定在一基板上，例如，图3中的固定光栅13固定在背光板12上。可移动光栅14设置在所述固定光栅13之上，并可在所述可移动光栅14所在的平面内相对于所述固定光栅13的发生位移，以调整所述固定光栅13和所述可移动光栅14之间的、供光透过的狭缝的大小，从而对所述显示屏的亮态和暗态进行转换。
具体地，该固定光栅13和所述可移动光栅14的狭缝的延伸方向相同。例如，图3中所述的固定光栅13和可移动光栅14的狭缝均为垂直于纸面的方向。
请参阅图6，图6是本发明显示装置实施例的结构示意图。
本发明还提供了一种显示装置，该显示装置包括外框20和显示屏10。
如图3所示，显示屏10包括衬底11、背光板12、固定光栅13和可移动光栅14。
其中，背光板12设置在所述衬底11上。
固定光栅13设置在所述背光板12上。
所述可移动光栅14设置在所述固定光栅13之上且平行于所述固定光栅13，并可在所述可移动光栅14所在的平面内相对于所述固定光栅13的发生位移，即如图3，可移动光栅14在水平方向发生左右移动，在竖直方向上，固定光栅13和可移动光栅14的距离不变。以调整所述固定光栅13和所述可移动光栅14之间的、供所述背光板12发出的光透过的狭缝的大小，从而对所述显示屏的亮态和暗态进行转换。
具体而言，当固定光栅13和可移动光栅14之间具有电位差的时候，固定光栅13和可移动光栅14带有异种电荷，使得固定光栅13和可移动光栅14之间产生静电力，在静电力的作用下，可移动光栅14与位于其下方的固定光栅13形成有相对位移，进而使得透过固定光栅13的RGB背光可以有选择性地透过可移动光栅14，实现光阀的暗态和亮态之间的转换。
综上所述，本发明能在实现显示屏在暗态和亮态之间的转换的同时维护显示屏亮度的均匀性和稳定性，同时还简化了驱动电路，提高了像素开口率。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (15)

  1. 一种微机电光阀，其特征在于，包括：
    固定光栅，固定在一基板上；
    可移动光栅，所述可移动光栅设置在所述固定光栅之上且平行于所述固定光栅，并可在所述可移动光栅所在的平面内相对于所述固定光栅的发生位移，以调整所述固定光栅和所述可移动光栅之间的、供光透过的狭缝的大小；所述固定光栅和所述可移动光栅的狭缝的延伸方向相同。
  2. 一种显示屏，其特征在于，包括：
    衬底，
    背光板，设置在所述衬底上；
    固定光栅，设置在所述背光板上；
    可移动光栅，所述可移动光栅设置在所述固定光栅之上且平行于所述固定光栅，并可在所述可移动光栅所在的平面内相对于所述固定光栅的发生位移，以调整所述固定光栅和所述可移动光栅之间的、供所述背光板发出的光透过的狭缝的大小，从而对所述显示屏的亮态和暗态进行转换。
  3. 根据权利要求2所述的显示屏，其特征在于，所述固定光栅的狭缝和所述可移动光栅的狭缝的延伸方向相同。
  4. 根据权利要求3所述的显示屏，其特征在于，所述背光板为OLED发光背板。
  5. 根据权利要求4所述的显示屏，其特征在于，所述OLED发光背板包括R像素、G像素和B像素，所述R像素、所述G像素和所述B像素均呈条状分布。
  6. 根据权利要求5所述的显示屏，其特征在于，所述R像素通过R电路驱动，所述G像素通过G电路驱动，所述B像素通过B电路驱动，所述 R电路、G电路和B电路相互独立。
  7. 根据权利要求6所述的显示屏，其特征在于，所述R电路、G电路和B电路均设置在所述OLED发光背板的一侧。
  8. 根据权利要求7所述的显示屏，其特征在于，所述背光板上还覆盖有封装层，以保护所述背光板上的发光器件。
  9. 一种显示装置，其特征在于，所述显示装置包括一种显示屏，所述显示屏包括：
    衬底，
    背光板，设置在所述衬底上；
    固定光栅，设置在所述背光板上；
    可移动光栅，所述可移动光栅设置在所述固定光栅之上且平行于所述固定光栅，并可在所述可移动光栅所在的平面内相对于所述固定光栅的发生位移，以调整所述固定光栅和所述可移动光栅之间的、供所述背光板发出的光透过的狭缝的大小，从而对所述显示屏的亮态和暗态进行转换。
  10. 根据权利要求9所述的显示装置，其特征在于，所述固定光栅的狭缝和所述可移动光栅的狭缝的延伸方向相同。
  11. 根据权利要求10所述的显示装置，其特征在于，所述背光板为OLED发光背板。
  12. 根据权利要求11所述的显示装置，其特征在于，所述OLED发光背板包括R像素、G像素和B像素，所述R像素、所述G像素和所述B像素均呈条状分布。
  13. 根据权利要求12所述的显示装置，其特征在于，所述R像素通过R电路驱动，所述G像素通过G电路驱动，所述B像素通过B电路驱动，所述 R电路、G电路和B电路相互独立。
  14. 根据权利要求13所述的显示装置，其特征在于，所述R电路、G电路和B电路均设置在所述OLED发光背板的一侧。
  15. 根据权利要求14所述的显示装置，其特征在于，所述背光板上还覆盖有封装层，以保护所述背光板上的发光器件。
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CN107546337B (zh) * 2017-08-24 2020-07-24 京东方科技集团股份有限公司 有机发光器件及其亮度调节方法、显示装置
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