WO2019127808A1 - 柔性显示装置及柔性显示面板的弯曲状态量的获取方法 - Google Patents
柔性显示装置及柔性显示面板的弯曲状态量的获取方法 Download PDFInfo
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- WO2019127808A1 WO2019127808A1 PCT/CN2018/074290 CN2018074290W WO2019127808A1 WO 2019127808 A1 WO2019127808 A1 WO 2019127808A1 CN 2018074290 W CN2018074290 W CN 2018074290W WO 2019127808 A1 WO2019127808 A1 WO 2019127808A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
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- the present invention relates to the field of flexible display technologies, and in particular to a flexible display device and a method for acquiring a bending state quantity of a flexible display panel.
- Flexible displays currently widely used are flexible film display substrates, which have good bending properties.
- the use of screen bending as an input is also an inevitable development direction.
- the amount of state during the bending process includes the displacement of each point on the screen, the amount of bending, the direction of bending, and the like. They are expected to operate on the display screen as an input. How to effectively measure the amount of bending state of the flexible display during bending is one of the key technologies.
- a flexible display device includes: a flexible display panel; a fiber grating sensor for emitting incident light waves and receiving reflected light waves, and according to an elastic coefficient of the optical fiber and a wavelength of the incident light wave Drifting to determine an amount of bending state of the flexible display panel; wherein the reflected light wave is an incident light wave that returns after being reflected.
- the amount of bending state of the flexible display panel includes a bending direction and a bending amount of the flexible display panel.
- the FBG sensor emits the incident light wave to a protruding unit of the flexible display panel; the FBG sensor calculates the wavelength based on a center wavelength of the incident light wave and a center wavelength of the reflected light wave Drift, the reflected light wave is an incident light wave that is reflected back at the protruding unit.
- the fiber Bragg grating sensor calculates the elastic coefficient of the fiber by using the optical stress tensor of the fiber.
- the fiber grating sensor comprises one of a Bragg fiber grating sensor, a long period fiber grating sensor, a chirped fiber grating sensor, and a blazed fiber grating sensor.
- the fiber grating sensor is disposed on a surface of the flexible display panel, or the fiber grating sensor is integrated in the flexible display panel.
- a method for acquiring a bending state quantity of a flexible display panel further comprising the steps of: a fiber grating sensor emitting an incident light wave; the fiber grating sensor receiving a reflected light wave, wherein the reflected light wave is An incident light wave returned after being reflected; the fiber grating sensor determines a bending state amount of the flexible display panel according to an elastic coefficient of the optical fiber and a wavelength shift of the incident light wave.
- the amount of bending state of the flexible display panel includes a bending direction and a bending amount of the flexible display panel.
- the calculation method of the wavelength shift of the incident light wave includes: the FBG sensor emits the incident light wave to a protruding unit of the flexible display panel; the FBG sensor is based on a center wavelength of the incident light wave The wavelength shift of the reflected light wave is calculated, and the reflected light wave is an incident light wave that is reflected back at the protruding unit.
- the calculation method of the elastic coefficient of the optical fiber includes: the FBG sensor calculates an elastic coefficient of the optical fiber by using an optical stress tensor of the optical fiber.
- the invention has the beneficial effects that the invention can effectively detect the bending state of the flexible display panel by using the fiber grating sensor, and the fiber grating sensor is strong against external electromagnetic interference, and the detected bending state of the flexible display panel is more accurate.
- FIG. 1 is a top plan view of a flexible display device in accordance with an embodiment of the present invention.
- FIG. 2 is a side view of a flexible display device in accordance with an embodiment of the present invention.
- FIG. 3 is a schematic diagram of the principle of a fiber grating sensor according to an embodiment of the present invention.
- FIG. 4 is a state diagram of a flexible display panel folded in accordance with an embodiment of the present invention.
- FIG. 5 is a state diagram of a flexible display panel folded outward according to an embodiment of the present invention.
- FIG. 6 is a state diagram of a flexible display panel bent in an "S" shape according to an embodiment of the present invention.
- FIG. 7 is a flow chart of a method of acquiring a bending state amount of a flexible display panel according to an embodiment of the present invention.
- 1 is a top plan view of a flexible display device in accordance with an embodiment of the present invention.
- 2 is a side view of a flexible display device in accordance with an embodiment of the present invention.
- the flexible display device 10 includes a flexible display panel 100 and first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209.
- the first to eighth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208 are disposed at a boundary region of the flexible display panel 100, and the ninth fiber grating sensor 209 is disposed on the flexible display panel 100.
- the central area is, but the invention is not limited thereto.
- the FBG sensor may be disposed only at the boundary region of the flexible display panel 100, or the FBG sensor may be disposed only at the central portion of the flexible display panel 100.
- the number of FBG sensors is not limited to that shown, and any number of FBG sensors can be disposed at the boundary area and/or at the central area of the flexible display panel 100 according to actual needs.
- the flexible display panel 100 may be an organic light emitting diode display panel or a liquid crystal display panel.
- the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 are used to detect the amount of bending state of the flexible display panel 100, respectively.
- the amount of bending state of the flexible display panel 100 may include a bending amount (or bending angle) and a bending direction, and may also include other parameter amounts.
- the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 respectively emit incident light waves toward the flexible display panel 100 and receive and use reflected light waves, which are displayed in a flexible manner
- the incident light wave returned after the panel 100 reflects
- the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 are respectively according to the optical fiber coefficient of the optical fiber and the wavelength drift of the incident light wave.
- the amount of bending state of the flexible display panel 100 is determined.
- a fiber Bragg grating sensor is used as an example of a Bragg fiber grating sensor.
- FIG. 3 is a schematic diagram of the principle of a fiber Bragg grating sensor in accordance with an embodiment of the present invention.
- the grating 10 of the Bragg fiber grating sensor has a period of less than 1 ⁇ m, for example 500 nm.
- the wavelength ⁇ B is the center wavelength of the light wave reflected back through the grating 10 of the Bragg fiber grating sensor (ie, the incident light wave emitted by the Bragg fiber grating sensor).
- ⁇ is the period length of the grating 10 and n eff is the refractive index of the fiber to the center wavelength of the free space, which is a fixed value.
- the propagation of light can be calibrated in time and space.
- Free space can be understood here as vacuum.
- the refractive index of light in vacuum is 1.0
- the refractive index in optical fiber is 1.5.
- the Bragg fiber grating sensor is used for strain measurement. The relationship between the wavelength shift ⁇ BS of the light wave reflected back through the grating 10 of the Bragg fiber grating sensor and the longitudinal strain ⁇ it receives is:
- ⁇ BS ⁇ B (1- ⁇ a ) ⁇ (2)
- ⁇ a is the elastic coefficient of the fiber
- ⁇ 11 and ⁇ 12 are the two components of the optical stress tensor of the fiber
- ⁇ is the Poisson coefficient.
- the longitudinal strain ⁇ can be determined, so that the determination of the amount of bending state of the flexible display panel 100 can be achieved.
- the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 of the present embodiment may also be long period gratings (Long Period Fiber Grating) , LPG) sensors, Chirped Fiber Grating sensors, Blazed Fiber Grating sensors, etc.
- first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 are disposed on the surface of the flexible display panel 100 in the present embodiment, The invention is not limited thereto, and for example, the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 may also be integrated in the flexible display panel 100.
- FIG. 4 is a state diagram of the flexible display panel folded inwardly according to an embodiment of the present invention.
- FIG. 5 is a state diagram of a flexible display panel folded outward according to an embodiment of the present invention.
- 6 is a view showing a state in which the flexible display panel is bent in an "S" shape according to an embodiment of the present invention.
- the first to third fiber grating sensors 201, 202, 203 respectively emit incident light waves to the protruding unit of the flexible display panel 100.
- the "projecting unit” may be a structure formed to generate a reflected wave (not shown), or may be a convex portion formed by bending of the flexible display panel 100.
- the first to third fiber grating sensors 201, 202, 203 are respectively based on the center wavelength and the reflected light wave of the incident light wave (i.e., the light wave reflected back through the gratings of the first to third fiber grating sensors 201, 202, 203, respectively).
- the wavelength of the reflected light wave is calculated by the center wavelength of the light waves incident on the first to third fiber grating sensors 201, 202, and 203, respectively (that is, the difference between the center wavelength of the incident light wave and the center wavelength of the reflected light wave), and the reflected light wave is A returning incident light wave that is reflected at the convex unit.
- the optical stress tensor of the optical fiber is determined, and the first to third fiber grating sensors 201, 202, and 203 respectively calculate the optical fiber by using the optical stress tensor of the optical fiber by the above formula 3. Bomb coefficient.
- the first to third fiber grating sensors 201, 202, and 203 calculate the longitudinal strain of the optical fiber by the above formula 2, respectively, based on the above-described calculated optical fiber coefficient and wavelength drift of the optical fiber.
- the longitudinal strain of the optical fiber indicates the amount of bending state of the flexible display panel 100.
- the wavelength drift and the longitudinal strain are linear, so that the longitudinal strain can be determined by the calculated wavelength drift, and the longitudinal strain represents the amount of the bending state of the flexible display panel 100. Thereby, the determination of the amount of bending state of the flexible display panel 100 can be achieved.
- the first to third fiber grating sensors 201, 202, 203 are taken as an example to explain how to determine the amount of bending state of the flexible display panel 100
- the fourth to ninth fiber grating sensors 204, 205, 206, 207, 208 The process of determining the amount of bending state of the flexible display panel 100 is consistent with the processes of the first to third fiber grating sensors 201, 202, 203 as an example of how to determine the amount of bending state of the flexible display panel 100.
- FIG. 7 is a flow chart of a method of acquiring a bending state amount of a flexible display panel according to an embodiment of the present invention.
- a method for acquiring a bending state quantity of a flexible display panel includes:
- Step S710 The first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 disposed at the boundary region and/or the central region of the flexible display panel 100 respectively emit incident light waves.
- Step S720 The first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 respectively receive reflected light waves, which are incident light waves that are returned after being reflected.
- Step S730 The first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 determine the flexible display panel 100 according to the elastic coefficient of the optical fiber and the wavelength shift of the incident light wave, respectively. The amount of bending state.
- the calculation method of the wavelength drift of the incident light wave includes: the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 respectively emit the incident Light waves to the protruding unit of the flexible display panel 100; the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 are respectively calculated based on the center wavelength of the incident light wave and the center wavelength of the reflected light wave
- the wavelength drifts, and the reflected light wave is a return incident light wave that is reflected at the convex unit.
- the calculation method of the elastic coefficient of the optical fiber includes: the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 respectively utilize the optical stress of the optical fiber
- the tensor is calculated by the above formula (3).
- the first to ninth fiber grating sensors 201, 202, 203, 204, 205, 206, 207, 208, 209 are respectively according to the calculated optical fiber coefficient and wavelength drift of the optical fiber.
- the longitudinal strain of the optical fiber was calculated by the above formula 2.
- the longitudinal strain of the optical fiber indicates the amount of bending state of the flexible display panel 100. Specifically, it can be seen from the above formula 2 that after the elastic coefficient of the optical fiber is determined, the wavelength drift and the longitudinal strain are linear, so that the longitudinal strain can be determined by the calculated wavelength shift, and the longitudinal strain indicates the bending of the flexible display panel 100.
- the amount of state so that the determination of the amount of bending state of the flexible display panel 100 can be achieved.
- the amount of bending state of the flexible display panel can be effectively detected by using the fiber Bragg grating sensor, and the fiber grating sensor is strong against external electromagnetic interference, and the detected bending state of the flexible display panel is more accurate.
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Abstract
一种柔性显示装置,其包括:柔性显示面板(100);设置在柔性显示面板(100)的边界区处和/或中心区处的光纤光栅传感器(201~209),光纤光栅传感器(201~209)发射入射光波并接收反射光波,反射光波是在被反射之后返回的入射光波,光纤光栅传感器(201~209)根据光纤的弹光系数和入射光波的波长漂移来确定柔性显示面板(100)的弯曲状态量。本发明能够利用光纤光栅传感器(201~209)有效检测出柔性显示面板(100)的弯曲状态量,并且光纤光栅传感器(201~209)抗外界电磁干扰能力强,检测出的柔性显示面板(100)的弯曲状态量更精确。
Description
本发明属于柔性显示技术领域,具体地讲,涉及一种柔性显示装置及柔性显示面板的弯曲状态量的获取方法。
近年来,针对柔性显示器(诸如柔性OLED显示器)的显示技术飞速发展,与传统的刚性显示器相比,柔性显示器具有耐冲击、抗震能力强、重量轻、体积小甚至可穿戴等一系列优势,因此广受市场欢迎。
柔性显示器目前广泛使用的是薄膜类柔性显示基板,它们弯曲特性好,除了曲面显示,利用屏幕的弯曲作为输入也是发展的必然方向。弯曲过程中的状态量包括屏幕各点位的位移、弯曲量、弯曲方向等。它们都有望作为输入量来对显示画面进行操作,如何有效测量柔性显示器在弯曲过程中的弯曲状态量是其中的关键技术。
发明内容
为了解决上述现有技术存在的问题,本发明的目的在于提供一种能够有效检测柔性显示器在弯曲过程中的弯曲状态量的柔性显示装置及柔性显示面板的弯曲状态量的获取方法。
根据本发明的一方面,提供了一种柔性显示装置,其包括:柔性显示面板;光纤光栅传感器,用于发射入射光波并接收反射光波,且根据光纤的弹光系数和所述入射光波的波长漂移来确定所述柔性显示面板的弯曲状态量;其中,所述反射光波是在被反射之后返回的入射光波。
进一步地,所述柔性显示面板的弯曲状态量包括所述柔性显示面板的弯曲方向和弯曲量。
进一步地,所述光纤光栅传感器发射所述入射光波到所述柔性显示面板的 凸出单元;所述光纤光栅传感器基于所述入射光波的中心波长和所述反射光波的中心波长计算出所述波长漂移,所述反射光波是在所述凸出单元处被反射返回的入射光波。
进一步地,所述光纤光栅传感器通过利用光纤的光学应力张量计算出光纤的弹光系数。
进一步地,所述光纤光栅传感器包括布拉格光纤光栅传感器、长周期光纤光栅传感器、啁啾光纤光栅传感器和闪耀光纤光栅传感器中的一种。
进一步地,所述光纤光栅传感器设置于所述柔性显示面板的表面,或者所述光纤光栅传感器集成于所述柔性显示面板内。
根据本发明的另一方面,还提供了一种柔性显示面板的弯曲状态量的获取方法,其包括步骤:光纤光栅传感器发射入射光波;所述光纤光栅传感器接收反射光波,所述反射光波是在被反射之后返回的入射光波;所述光纤光栅传感器根据光纤的弹光系数和所述入射光波的波长漂移来确定所述柔性显示面板的弯曲状态量。
进一步地,所述柔性显示面板的弯曲状态量包括所述柔性显示面板的弯曲方向和弯曲量。
进一步地,所述入射光波的波长漂移的计算方法包括:所述光纤光栅传感器发射所述入射光波到所述柔性显示面板的凸出单元;所述光纤光栅传感器基于所述入射光波的中心波长和所述反射光波的中心波长计算出所述波长漂移,所述反射光波是在所述凸出单元处被反射返回的入射光波。
进一步地,所述光纤的弹光系数的计算方法包括:所述光纤光栅传感器通过利用光纤的光学应力张量计算出光纤的弹光系数。
本发明的有益效果:本发明能够利用光纤光栅传感器有效检测出柔性显示面板的弯曲状态量,并且光纤光栅传感器抗外界电磁干扰能力强,检测出的柔性显示面板的弯曲状态量更精确。
通过结合附图进行的以下描述,本发明的实施例的上述和其它方面、特点和优点将变得更加清楚,附图中:
图1是根据本发明的实施例的柔性显示装置的俯视图;
图2是是根据本发明的实施例的柔性显示装置的侧视图;
图3是根据本发明的实施例的光纤光栅传感器的原理示意图;
图4是根据本发明的实施例的柔性显示面板内折后的状态图;
图5是根据本发明的实施例的柔性显示面板外折后的状态图;
图6是根据本发明的实施例的柔性显示面板呈“S”型弯折后的状态图;
图7是根据本发明的实施例的柔性显示面板的弯曲状态量的获取方法的流程图。
以下,将参照附图来详细描述本发明的实施例。然而,可以以许多不同的形式来实施本发明,并且本发明不应该被解释为限制于这里阐述的具体实施例。相反,提供这些实施例是为了解释本发明的原理及其实际应用,从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
在附图中,为了清楚起见,夸大了层和区域的厚度。相同的标号在整个说明书和附图中表示相同的元器件。
图1是根据本发明的实施例的柔性显示装置的俯视图。图2是是根据本发明的实施例的柔性显示装置的侧视图。
参照图1和图2,柔性显示装置10包括柔性显示面板100和第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209。
其中,第一至第八光纤光栅传感器201、202、203、204、205、206、207、208设置于柔性显示面板100的边界区处,而第九光纤光栅传感器209设置于 柔性显示面板100的中心区处,但本发明并不限制于此。例如,可以只在柔性显示面板100的边界区处设置光纤光栅传感器,也可以只在柔性显示面板100的中心区处设置光纤光栅传感器。此外,光纤光栅传感器的数量也并不以图示所示为限,其可以根据实际需求在柔性显示面板100的边界区处和/或中心区处设置任意数量的光纤光栅传感器。
柔性显示面板100可以是有机发光二极管显示面板或者液晶显示面板。
第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别用于检测柔性显示面板100的弯曲状态量。在本实施例中,柔性显示面板100的弯曲状态量可以包括弯曲量(或称弯曲角度)和弯曲方向,也可以包括其他的参数量。
第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别朝向柔性显示面板100发射入射光波并接收和使用反射光波,所述反射光波是在被柔性显示面板100反射之后返回的入射光波,第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别根据光纤的弹光系数和所述入射光波的波长漂移来确定柔性显示面板100的弯曲状态量。
以下先对光纤光栅传感器如何确定柔性显示面板100的弯曲状态量的原理进行说明。以光纤光栅传感器为布拉格光纤光栅传感器为例进行说明。
图3是根据本发明的实施例的光纤光栅传感器的原理示意图。
参照图3,布拉格光纤光栅传感器的光栅10的周期小于1μm,例如可以是500nm。
针对布拉格光纤光栅传感器,波长λ
B是通过布拉格光纤光栅传感器的光栅10后被反射回去的光波(即布拉格光纤光栅传感器发射的入射光波)的中心波长。
λ
B=2n
effΛ (1)
其中,Λ是光栅10的周期长度,n
eff是光纤对自由空间中心波长的折射率,其为一固定值。这里,光的传播可在时间和空间上去标定,自由空间在此处可 理解为真空,例如光在真空中的折射率是1.0,在光纤中的折射率就是1.5。布拉格光纤光栅传感器用于应变的测量,通过布拉格光纤光栅传感器的光栅10后被反射回去的光波的波长漂移Δλ
BS和它所受的纵向应变Δε的关系式为:
Δλ
BS=λ
B(1-ρ
a)Δε (2)
其中,ρ
a是光纤的弹光系数,ρ
11和ρ
12是光纤的光学应力张量的两个分量,υ是泊松系数。对一特定的布拉格光纤光栅传感器沿特定方向弯曲,即ρ
11和ρ
12确定,光纤的弹光系数ρ
a可解出,波长漂移Δλ
BS和纵向应变Δε是线性关系。在本实施例中,波长漂移Δλ
BS指的是通过布拉格光纤光栅传感器的光栅10后被反射出去的光波(即布拉格光纤光栅传感器发射的入射光波)的中心波长与入射到布拉格光纤光栅传感器的光波(即被柔性显示面板100反射之后返回的入射光波)的中心波长之差。由此波长漂移Δλ
BS确定之后,纵向应变Δε就可以被确定,从而可以实现对柔性显示面板100的弯曲状态量的确定。
此外,作为本发明的其他实施方式,本实施例的第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209还可以是长周期光栅(Long Period Fiber Grating,LPG)传感器、啁啾光纤光栅(Chirped Fiber Grating)传感器、闪耀光纤光栅(Blazed Fiber Grating)传感器等。
此外,需要说明的是,虽然在本实施例中第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209设置于柔性显示面板100的表面上,但本发明并不限制于此,例如第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209还可以集成于柔性显示面板100内。
图4是根据本发明的实施例的柔性显示面板内折后的状态图。图5是根据本发明的实施例的柔性显示面板外折后的状态图。图6是根据本发明的实施例的柔性显示面板呈“S”型弯折后的状态图。
参照图4至图6,第一至第三光纤光栅传感器201、202、203分别发射入射光波到柔性显示面板100的凸出单元。“凸出单元”可以是为了产生反射波 (未示出)而形成的结构,或者可以是通过柔性显示面板100的弯曲而形成的凸出部分。
第一至第三光纤光栅传感器201、202、203分别基于入射光波(即分别通过第一至第三光纤光栅传感器201、202、203的光栅后被反射回去的光波)的中心波长和反射光波(分别入射到第一至第三光纤光栅传感器201、202、203的光波)的中心波长计算出反射光波的波长漂移(即分别入射光波的中心波长和反射光波的中心波长之差),反射光波是在所述凸出单元处被反射的返回入射光波。
当柔性显示面板100弯曲状态确定之后,光纤的光学应力张量被确定,第一至第三光纤光栅传感器201、202、203分别利用光纤的光学应力张量通过上面的式子3计算出光纤的弹光系数。
由上述式子2可知,光纤的弹光系数确定之后,波长漂移和纵向应变是线性关系。因此,第一至第三光纤光栅传感器201、202、203分别根据上述计算出的光纤的弹光系数和波长漂移并利用上述式子2计算出光纤的纵向应变。而光纤的纵向应变就表示柔性显示面板100的弯曲状态量。具体地,由上可知光纤的弹光系数确定之后,波长漂移和纵向应变呈线性光系,这样通过计算出的波长漂移就可以确定纵向应变,而纵向应变表示柔性显示面板100的弯曲状态量,从而可以实现对柔性显示面板100的弯曲状态量的确定。
这里,以第一至第三光纤光栅传感器201、202、203为例进行说明如何确定柔性显示面板100的弯曲状态量,而第四至第九光纤光栅传感器204、205、206、207、208、209确定柔性显示面板100的弯曲状态量的过程与第一至第三光纤光栅传感器201、202、203为例进行说明如何确定柔性显示面板100的弯曲状态量的过程一致。
图7是根据本发明的实施例的柔性显示面板的弯曲状态量的获取方法的流程图。
参照图7,一并参照图1至图6,根据本发明的实施例的柔性显示面板的弯曲状态量的获取方法包括:
步骤S710:设置在柔性显示面板100的边界区处和/或中心区处的第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别发射入射光波。
步骤S720:第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别接收反射光波,所述反射光波是在被反射之后返回的入射光波。
步骤S730:第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别根据光纤的弹光系数和所述入射光波的波长漂移来确定柔性显示面板100的弯曲状态量。
进一步地,在步骤S730中,所述入射光波的波长漂移的计算方法包括:第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别发射所述入射光波到柔性显示面板100的凸出单元;第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别基于入射光波的中心波长和反射光波的中心波长计算出所述波长漂移,反射光波是在凸出单元处被反射的返回入射光波。
此外,在步骤S730中,所述光纤的弹光系数的计算方法包括:第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别利用光纤的光学应力张量并通过上述的式子(3)计算出光纤的弹光系数。
此外,进一步地,在步骤S730中,第一至第九光纤光栅传感器201、202、203、204、205、206、207、208、209分别根据上述计算出的光纤的弹光系数和波长漂移并利用上述式子2计算出光纤的纵向应变。而光纤的纵向应变就表示柔性显示面板100的弯曲状态量。具体地,由上述式子2可知光纤的弹光系数确定之后,波长漂移和纵向应变呈线性光系,这样通过计算出的波长漂移就可以确定纵向应变,而纵向应变表示柔性显示面板100的弯曲状态量,从而可以实现对柔性显示面板100的弯曲状态量的确定。
综上所述,根据本发明的实施例,能够利用光纤光栅传感器有效检测出柔性显示面板的弯曲状态量,并且光纤光栅传感器抗外界电磁干扰能力强,检测出的柔性显示面板的弯曲状态量更精确。
虽然已经参照特定实施例示出并描述了本发明,但是本领域的技术人员将理解:在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下,可在此进行形式和细节上的各种变化。
Claims (14)
- 一种柔性显示装置,其中,包括:柔性显示面板;设置在所述柔性显示面板上的光纤光栅传感器,所述光纤光栅传感器用于发射入射光波并接收反射光波,且根据光纤的弹光系数和所述入射光波的波长漂移来确定所述柔性显示面板的弯曲状态量;其中,所述反射光波是在被反射之后返回的入射光波。
- 根据权利要求1所述的柔性显示装置,其中,所述柔性显示面板的弯曲状态量包括所述柔性显示面板的弯曲方向和弯曲量。
- 根据权利要求1所述的柔性显示装置,其中,所述光纤光栅传感器发射所述入射光波到所述柔性显示面板的凸出单元;所述光纤光栅传感器基于所述入射光波的中心波长和所述反射光波的中心波长计算出所述波长漂移,所述反射光波是在所述凸出单元处被反射返回的入射光波。
- 根据权利要求2所述的柔性显示装置,其中,所述光纤光栅传感器发射所述入射光波到所述柔性显示面板的凸出单元;所述光纤光栅传感器基于所述入射光波的中心波长和所述反射光波的中心波长计算出所述波长漂移,所述反射光波是在所述凸出单元处被反射返回的入射光波。
- 根据权利要求1所述的柔性显示装置,其中,所述光纤光栅传感器通过利用光纤的光学应力张量计算出光纤的弹光系数。
- 根据权利要求2所述的柔性显示装置,其中,所述光纤光栅传感器通过利用光纤的光学应力张量计算出光纤的弹光系数。
- 根据权利要求1所述的柔性显示装置,其中,所述光纤光栅传感器包括布拉格光纤光栅传感器、长周期光纤光栅传感器、啁啾光纤光栅传感器和闪耀光纤光栅传感器中的一种。
- 根据权利要求1所述的柔性显示装置,其中,所述光纤光栅传感器设置于所述柔性显示面板的表面上,或者所述光纤光栅传感器集成于所述柔性显示面板内。
- 一种柔性显示面板的弯曲状态量的获取方法,其中,包括步骤:设置在所述柔性显示面板上的光纤光栅传感器发射入射光波;所述光纤光栅传感器接收反射光波,所述反射光波是在被反射之后返回的入射光波;所述光纤光栅传感器根据光纤的弹光系数和所述入射光波的波长漂移来确定所述柔性显示面板的弯曲状态量。
- 根据权利要求9所述的柔性显示面板的弯曲状态量的获取方法,其中,所述柔性显示面板的弯曲状态量包括所述柔性显示面板的弯曲方向和弯曲量。
- 根据权利要求9所述的柔性显示面板的弯曲状态量的获取方法,其中,所述入射光波的波长漂移的计算方法包括:所述光纤光栅传感器发射所述入射光波到所述柔性显示面板的凸出单元;所述光纤光栅传感器基于所述入射光波的中心波长和所述反射光波的中心波长计算出所述波长漂移,所述反射光波是在所述凸出单元处被反射返回的入射光波。
- 根据权利要求10所述的柔性显示面板的弯曲状态量的获取方法,其中,所述入射光波的波长漂移的计算方法包括:所述光纤光栅传感器发射所述入射光波到所述柔性显示面板的凸出单元;所述光纤光栅传感器基于所述入射光波的中心波长和所述反射光波的中心波长计算出所述波长漂移,所述反射光波是在所述凸出单元处被反射返回的 入射光波。
- 根据权利要求9所述的柔性显示面板的弯曲状态量的获取方法,其中,所述光纤的弹光系数的计算方法包括:所述光纤光栅传感器通过利用光纤的光学应力张量计算出光纤的弹光系数。
- 根据权利要求10所述的柔性显示面板的弯曲状态量的获取方法,其中,所述光纤的弹光系数的计算方法包括:所述光纤光栅传感器通过利用光纤的光学应力张量计算出光纤的弹光系数。
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