CN115331638B - Display panel, operation method thereof and sub-pixel - Google Patents

Display panel, operation method thereof and sub-pixel Download PDF

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Publication number
CN115331638B
CN115331638B CN202110505837.1A CN202110505837A CN115331638B CN 115331638 B CN115331638 B CN 115331638B CN 202110505837 A CN202110505837 A CN 202110505837A CN 115331638 B CN115331638 B CN 115331638B
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China
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light
sensing
sensing element
quantum dot
dot material
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CN202110505837.1A
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Chinese (zh)
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CN115331638A (en
Inventor
向瑞杰
陈志強
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Acer Inc
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Acer Inc
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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
    • G09G3/34—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
    • G09G3/36—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 using liquid crystals
    • 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
    • G09G3/22—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]
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • G09G2360/148—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel the light being detected by light detection means within each pixel

Abstract

The invention provides a display panel, an operation method thereof and a sub-pixel. The display panel includes a plurality of sub-pixels. At least one of the sub-pixels includes a display portion, a quantum dot material, and a sensing element. The quantum dot material is distinguishable from a blue light component of the first light from the display portion. The quantum dot material is excited by a blue light component of the first light to generate a second light, and the sensing element can sense the second light. Wherein the blue light component of the first light has a wavelength different from the wavelength of the second light, and the blue light component and the second light each belong to a different wavelength range. The wavelength region of the second light may be narrower than the wavelength region of the blue light component of the first light.

Description

Display panel, operation method thereof and sub-pixel
Technical Field
The present invention relates to a display device, and more particularly, to a display panel, an operating method thereof, and a sub-pixel.
Background
The medical literature has discussed that the blue light component emitted by the display may cause visual fatigue and injury to the user. Techniques for reducing the detrimental blue component of a display can be divided into software and hardware. The software method is to adjust the red-blue-green ratio of the display screen to reduce the intensity of the blue light component, but the display screen has color shift problem. The hardware method is to shift the blue peak of the element so as to reduce the blue hazard. In any event, the prior art uses an additional sensor (external sensor) to sense the blue light component of the display screen of the display panel. Such blue light sensing technology is not instantaneous, and a user needs to manually operate an additional sensor to sense the display screen of the display panel.
In order to enable a user to know the current state of the blue light component of the display panel and/or to automatically (periodically or aperiodically) and timely adjust the display parameters, it is one of the important technical issues to timely sense the blue light component of the display screen without using an external sensor.
Disclosure of Invention
The invention provides a display panel, an operation method thereof and a sub-pixel thereof, which are used for self-sensing specific components of a display picture.
In an embodiment of the invention, the display panel includes a plurality of sub-pixels. At least one of the subpixels includes a display portion, a first quantum dot material (quantum dot material), and a first sensing element. The first quantum dot material is configured to be excited by a first blue component of first light from the display portion to generate second light. The first sensing element is configured to sense the second light. Wherein the wavelength of the first blue light component of the first light is different from the wavelength of the second light, the first quantum dot material is distinguishable from the first blue light component of the first light, and the first Lan Guangcheng and second light each belong to a different wavelength range.
In an embodiment of the present invention, the above-mentioned operation method includes: exciting the first quantum dot material by a first blue light component of the first light from the display portion to generate a second light; and sensing the second light by the first sensing element. Wherein the wavelength of the first blue light component of the first light is different from the wavelength of the second light, the first quantum dot material is distinguishable from the first blue light component of the first light, and the first Lan Guangcheng and second light each belong to a different wavelength range.
In an embodiment of the invention, the sub-pixel includes a display portion and a sensing portion. The sensing part comprises a first sensing capacitor, a first quantum dot material and a first sensing element. The first end of the first sensing capacitor is coupled to the first end of the first sensing element. The second end of the first sensing element is coupled to the first sensing line of the display panel. The first quantum dot material is configured to be excited by a first blue component of first light from the display portion to generate second light. The first sensing element is configured to sense the second light. The second light affects a first leakage current of the first sensing element. Wherein, during the reset period, the first sensing capacitor is charged; during sensing, the first sensing element leaks charge of the first sensing capacitor based on a first leakage current affected by the second light; and during the sensing, the first sensing element is on.
Based on the above, at least one sub-pixel (sub-pixel circuit) of the display panel of the embodiments of the present invention includes a display portion and a sensing portion, wherein the sensing portion includes a quantum dot material and a sensing element. The quantum dot material is distinguishable from a first blue component of the first light from the display portion. The quantum dot material is excited by a first blue component of the first light to produce a second light. The sensing element can sense the second light, so the processing circuit can instantly know the intensity of the first blue light component from the display part according to the sensing result of the sensing element. That is, the display panel can self-sense a specific component (e.g., the first blue component) of the display screen without an additional sensor (external sensor).
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic circuit block diagram of a display device according to an embodiment of the present invention.
Fig. 2 is a circuit diagram illustrating the display portion shown in fig. 1 according to an embodiment of the present invention.
Fig. 3 is a circuit diagram illustrating the display portion shown in fig. 1 according to another embodiment of the present invention.
Fig. 4 is a flowchart illustrating an operation method of a display panel according to an embodiment of the invention.
FIG. 5 is a schematic cross-sectional view illustrating the sub-pixel of FIG. 1 according to one embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view illustrating the sub-pixel of fig. 1 in accordance with another embodiment of the present invention.
FIG. 7 is a circuit diagram illustrating the sensing portion of FIG. 1 according to an embodiment of the present invention.
FIG. 8 is a signal waveform diagram illustrating the gate lines and the sensing capacitors shown in FIG. 7 according to an embodiment of the present invention.
Fig. 9 is a circuit diagram illustrating the sensing portion shown in fig. 1 according to another embodiment of the present invention.
Fig. 10 is a circuit diagram illustrating the sensing portion shown in fig. 1 according to still another embodiment of the present invention.
FIG. 11 is a circuit diagram illustrating the sensing portion of FIG. 1 according to another embodiment of the present invention.
FIG. 12 is a signal waveform diagram illustrating the gate lines and the sensing capacitors shown in FIG. 11 according to an embodiment of the present invention.
FIG. 13 is a circuit diagram illustrating the sensing portion of FIG. 1 according to a further embodiment of the present invention.
FIG. 14 is a schematic cross-sectional view illustrating the sub-pixel of FIG. 13, in accordance with an embodiment of the invention.
Fig. 15 is a schematic cross-sectional view illustrating the sub-pixel of fig. 13 in accordance with another embodiment of the invention.
100, a display device; 110, a display panel; 111-11, 111-12, 111-m1, 111-1n, 111-mn, sub-pixels; 120, a source driver; 130 a gate driver; 140, a processing circuit; 210, a switch; 220 a transistor; 230 a light emitting element; 310, a switch; 320, storing the capacitor; 330, liquid crystal capacitance; 610 a first substrate side; 620 a second substrate side; 1420. 1520 control elements; 1430. 1530 display structure; b, a shading structure; BM, shading color resistance; c71, C91, C101, C111, C131, C132; CF, color filter; CL1 is a read control line; d1, dm, data line; a display unit DP; f81, f82, f12_1, f12_k+2, k×f; g1, G2, gn; l1, first light; l2. second light; lamb, ambient light; LP, light reflecting structure; PS, light spacer; QD, QD1, QD2: quantum dot material; RL1, reset line; RO, read period; RST, reset period; s1, S1_1, S1_2, sm; s410, S420, step; SE, SE1, SE 2; SEN: sensing period; a sensing part SP; SW71 a reset switch; VCOM, common voltage; VDD: supply voltage; vref, VSS.
Detailed Description
The term "coupled (or connected"), as used throughout this specification (including the claims), may refer to any direct or indirect connection. For example, if a first device couples (or connects) to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and connections. The terms first and second used throughout the present specification (including the claims) are used for naming elements or distinguishing between different embodiments or ranges, and not for limiting the number of elements, either upper or lower, or the order of the elements. In addition, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. Elements/components/steps in different embodiments that use the same reference numerals or use the same language may be referred to in relation to each other.
Fig. 1 is a schematic circuit block diagram of a display device 100 according to an embodiment of the invention. The display device 100 shown in fig. 1 includes a display panel 110, a source driver (data driver) 120, a gate driver (scan driver) 130, and a processing circuit 140. The source driver 120, the gate driver 130, and/or the processing circuit 140 may be implemented in hardware (hardware), firmware (firmware), software (software) or a combination of any three according to various design requirements.
In hardware, the source driver 120, the gate driver 130, and/or the processing circuit 140 may be implemented as logic circuits on an integrated circuit (integrated circuit). The above-described relevant functions of the source driver 120, gate driver 130, and/or processing circuit 140 may be implemented as hardware using a hardware description language (hardware description languages, such as Verilog HDL or VHDL) or other suitable programming language. For example, the related functions of the source driver 120, the gate driver 130, and/or the processing circuit 140 may be implemented in various logic blocks, modules, and circuits in one or more controllers, microcontrollers, microprocessors, application-specific integrated circuits (ASICs), digital signal processors (digital signal processor, DSPs), field programmable gate arrays (Field Programmable Gate Array, FPGAs), and/or other processing units.
The relevant functions of the source driver 120, the gate driver 130, and/or the processing circuit 140 may be implemented as programming code (programming codes) in software and/or firmware. For example, the source driver 120, gate driver 130, and/or processing circuit 140 may be implemented using a general programming language (programming languages, e.g., C, C ++ or a combination language) or other suitable programming language. The programming code may be recorded/stored on a non-transitory computer readable medium (non-transitory computer readable medium). In some embodiments, the non-transitory computer readable medium includes, for example, read Only Memory (ROM), tape, disk, card, semiconductor Memory, programmable logic, and/or storage device. The storage device includes a hard disk (HDD), a Solid-state drive (SSD), or other storage devices. A central processing unit (Central Processing Unit, CPU), controller, microcontroller or microprocessor can read and execute programming code from a non-transitory computer readable medium to perform the functions associated with the source driver 120, gate driver 130 and/or processing circuit 140 described above.
The display panel 110 includes m×n sub-pixels, such as sub-pixels 111-11, 111-m1, 111-1n and 111-mn shown in fig. 1, where m and n are integers determined according to practical design. Each of these sub-pixels 111-11 to 111-mn includes a display section, for example, the sub-pixel 111-11 shown in fig. 1 includes a display section DP. The control terminal (gate) of each of the display portions DP of the sub-pixels 111-11 to 111-mn is coupled to the gate driver 130 via a corresponding gate line of the plurality of gate lines (scan lines) G1 to Gn of the display panel 110. The data terminal (source) of each of the display portions DP of the sub-pixels 111-11 to 111-mn is coupled to the source driver 120 via a corresponding one of the data lines (source lines) D1-Dm of the display panel 110.
The implementation details of the display portion DP may be determined according to the actual design. For example, in some embodiments, the display portion DP shown in fig. 1 may include an spontaneous photon pixel structure (e.g., refer to the related description of the display portion DP shown in fig. 2) to generate the first light L1. In other embodiments, the display portion DP shown in fig. 1 may include a non-self-emitting sub-pixel structure (e.g., refer to the description of the display portion DP shown in fig. 3). The backlight (not shown in fig. 1) may generate the first light L1 through the non-spontaneous-photon pixel structure. In still other embodiments, the display portion DP shown in fig. 1 may include conventional sub-pixel circuits or other sub-pixel circuits.
Fig. 2 is a circuit diagram illustrating the display portion DP shown in fig. 1 according to an embodiment of the present invention. The display portion DP shown in fig. 2 is an example of the display portion DP shown in fig. 1, but the implementation of the display portion DP shown in fig. 1 is not limited to the embodiment shown in fig. 2. The display portion DP shown in fig. 2 includes an auto-photonic pixel structure (e.g., a switch 210, a transistor 220, and a light emitting element 230). Please refer to fig. 1 and fig. 2. A control terminal (e.g., gate) of the switch 210 is coupled to the gate driver 130 via a corresponding gate line of a plurality of gate lines (scan lines) G1-Gn of the display panel 110. The first terminal (e.g., source) of the switch 210 is coupled to the source driver 120 via a corresponding one of a plurality of data lines (source lines) D1-Dm of the display panel 110. A control terminal (e.g., gate) of the transistor 220 is coupled to a second terminal (e.g., drain) of the switch 210. A first terminal (e.g., source) of the transistor 220 is coupled to the supply voltage VDD. The first terminal of the light emitting device 230 is coupled to the second terminal (e.g., drain) of the transistor 220. A second terminal of the light emitting device 230 is coupled to the reference voltage VSS. The levels of the power supply voltage VDD and the reference voltage VSS can be determined according to practical designs. In some embodiments, the light emitting element 230 may include a light emitting diode (light emitting diode, LED), micro-light emitting diode, organic light emitting diode (organic light emitting diode, OLED), or other self-light emitting element, according to a practical design.
Fig. 3 is a circuit diagram illustrating the display portion DP shown in fig. 1 according to another embodiment of the present invention. The display portion DP shown in fig. 3 is an example of the display portion DP shown in fig. 1, but the implementation of the display portion DP shown in fig. 1 is not limited to the embodiment shown in fig. 3. The display portion DP shown in fig. 3 includes a non-self-emitting pixel structure (e.g., a switch 310, a storage capacitor 320 and a liquid crystal (lc) capacitor 330. Referring to fig. 1 and 3, a control terminal (e.g., a gate) of the switch 310 is coupled to the gate driver 130 via a corresponding gate line of a plurality of gate lines (scan lines) G1-Gn of the display panel 110. A first terminal (e.g., a source) of the switch 310 is coupled to the source driver 120 via a corresponding data line of a plurality of data lines (source lines) D1-Dm of the display panel 110. The level of the common voltage VCOM is determined by practical design.
Referring to fig. 1, at least one of the sub-pixels 111-11 to 111-mn includes a sensing portion. For example, the sub-pixels 111-11 include a sensing portion SP. Depending on the actual design, the description of the subpixels 111-11 may be applicable to one or more (or even all) of the other subpixels of the display panel 110. The sensing parts SP of the sub-pixels 111-11 to 111-mn may provide the sensing result to the processing circuit 140 via a corresponding one of the plurality of sensing lines S1 to Sm of the display panel 110. The sensing portion SP of the sub-pixel 111-11 includes a quantum dot material QD (quantum dot material, not shown in fig. 1, which will be described in detail in the later embodiments) and a sensing element SE (not shown in fig. 1, which will be described in detail in the later embodiments).
Fig. 4 is a flowchart illustrating an operation method of a display panel according to an embodiment of the invention. Please refer to fig. 1 and fig. 4. A portion of the first light L1 from the display portion DP of the sub-pixel 111-11 may be irradiated to the quantum dot material QD (not shown in fig. 1) of the sensing portion SP of the sub-pixel 111-11. In step S410, the quantum dot material QD of the sensing portion SP may be excited by the first blue light component of the first light L1 from the display portion DP to generate the second light. The quantum dot material QD is distinguishable from the first blue component of the first light L1. That is, a certain specific wavelength range of the first light L1 easily excites the quantum dot material QD, but other wavelength ranges of the first light L1 do not easily (even cannot) excite the quantum dot material QD. By means of the component modulation of the quantum dot material QD, the specific wavelength range (first blue component) can be determined according to the actual design. For example, in some embodiments, the first blue light component (particular wavelength range) may belong to a blue wavelength range (e.g., blue light having a wavelength less than 455 nm). The quantum dot material QD may be excited by the first blue light component of the first light L1 to generate the second light, wherein the first Lan Guangcheng and the second light each belong to a different wavelength range.
The quantum dot material QD (not shown in fig. 1) is determined according to practical design. For example, in some embodiments, the quantum dot material QD may include inorganic compounds, inorganic composite halogen perovskite materials (organic inorganic hybrid halide perovskite), or other quantum dot materials. The inorganic compound may include PbS, baS, cdTe, gaAs, inGaAs, cuInS 2 Or other inorganic compounds. The inorganic composite halogen perovskite material may include a n+1 BnX 3n+1 、CsPbCl 3 、CsPb(Cl/Br) 3 、CsPbBr 3 、CsPb(I/Br) 3 、CsPbI 3 Or other inorganic composite halogen perovskite material.
The sensing element SE (not shown in fig. 1) of the sensing portion SP of the sub-pixel 111-11 can sense the second light generated by the sub-dot material QD (not shown in fig. 1). The sensing element SE may comprise a phototransistor, a photoresistor or other photosensitive element according to practical designs. The wavelength of the first blue light component of the first light L1 is different from the wavelength of the second light. Based on the discrimination of the quantum dot material QD to the first blue component of the first light L1, the sensing result of the sensing element SE of the sensing portion SP is responsive to the first blue component of the first light L1, and the sensing result of the sensing element SE is not easily affected by other components of the first light L1. In order to avoid that other components of the first light L1 influence the sensing result of the sensing element SE, the position of the sensing element SE is outside the irradiation range of the first light L1.
FIG. 5 is a schematic cross-sectional view illustrating the sub-pixel 111-11 of FIG. 1 in accordance with an embodiment of the invention. Fig. 5 shows the transistor 220 and the light emitting element 230 of the display portion DP and the blue light sensing capacitor (blue light sensor capacitance) Csen, the quantum dot material QD and the sensing element SE of the sensing portion SP. The blue light sensing capacitor Csen shown in fig. 5 may refer to the description of the sensing capacitor C71 shown in fig. 7, or the description of the sensing capacitor C91 shown in fig. 9, or the description of the sensing capacitor C101 shown in fig. 10, or the description of the sensing capacitor C111 shown in fig. 11, or the description of the sensing capacitor C131 and/or the description of the sensing capacitor C132 shown in fig. 13. The display portion DP and the sensing portion SP shown in fig. 5 can be described with reference to the display portion DP and the sensing portion SP shown in fig. 1. The transistor 220 and the light emitting element 230 shown in fig. 5 can be described with reference to the transistor 220 and the light emitting element 230 shown in fig. 2. The quantum dot material QD and the sensing element SE according to the embodiments shown in fig. 1 and 4 can be described with reference to the quantum dot material QD and the sensing element SE shown in fig. 5.
The sub-pixels 111-11 shown in fig. 5 further comprise light reflecting structures LP. The light reflecting structure LP is adapted to redirect a portion of the first light L1 to reflect a portion of the first light L1 to the quantum dot material QD. The light reflecting structure LP may include a reflective layer (reflector layer), a light-proof layer (light-proof layer), an absorption layer (absorption layer), and/or other structures according to practical designs. The reflective layer may be made of aluminum, aluminum alloy, aluminum oxide, copper, gold, a multi-layer reflective material, and/or other materials according to practical designs. The absorbing layer may be made of chromium (Cr), chromium oxide (CrO), carbon black resin (carbon black Resin), nano carbon black (Nano carbon black), and/or other materials.
In the embodiment shown in fig. 5, the quantum dot material QD is arranged between the light reflecting structure LP and the sensing element SE. For example, the quantum dot material QD may cover the sensing element SE. The quantum dot material QD may be excited by the first blue component of a portion of the first light L1 to generate a second light to the sensing element SE. In the embodiment shown in fig. 5, since the quantum dot material QD covers the sensing element SE, the sensing element SE is located outside the irradiation range of the first light L1, and the sensing element SE can sense the second light generated by the quantum dot material QD. By means of the component modulation of the quantum dot material QD, the wavelength of the second light can be determined according to the actual design. For example, the wavelength interval of the second light may be narrower than the wavelength interval of the first light L1. According to practical designs, in some embodiments, the primary wavelength region (above 90% of the ratio) of the first light L1 is 400nm to 500nm, and the primary wavelength region (above 90% of the ratio) of the second light is 350nm to 450nm. In other embodiments, the primary wavelength region (above 90% of the ratio) of the first light L1 is 400nm to 500nm, and the primary wavelength region (above 90% of the ratio) of the second light is 350nm to 380nm.
Fig. 6 is a schematic cross-sectional view illustrating the sub-pixel 111-11 shown in fig. 1 in accordance with another embodiment of the present invention. Fig. 6 shows a black matrix BM, a color filter CF, and a photo spacer PS. Fig. 6 also shows the switch 310 and the liquid crystal capacitor 330 of the display portion DP, and the quantum dot material QD and the sensing element SE of the sensing portion SP. The display portion DP and the sensing portion SP shown in fig. 6 can be described with reference to the display portion DP and the sensing portion SP shown in fig. 1. The switch 310 and the lc capacitor 330 shown in fig. 6 can be described with reference to the switch 310 and the lc capacitor 330 shown in fig. 3. The first light L1 provided by the backlight (not shown) may pass through the lc capacitor 330 and the color filter CF. The quantum dot material QD and the sensing element SE according to the embodiments shown in fig. 1 and 4 can be described with reference to the quantum dot material QD and the sensing element SE shown in fig. 6.
The sub-pixels 111-11 shown in fig. 6 further comprise a light shielding structure B, wherein the light shielding structure B comprises a quantum dot material QD. According to practical design, the light shielding structure B is disposed on the first substrate side 610 of the display panel, and the switch 310 and the sensing element SE are disposed on the second substrate side 620 of the display panel. The light shielding structure B is disposed in the optical path of a portion of the first light L1. Thus, the quantum dot material QD may receive a portion of the first light L1 from the first direction. Upon excitation of the first blue component of the first light L1, the quantum dot material QD may generate the second light L2 to the sensing element SE in the second direction. In the embodiment shown in fig. 6, the sensing element SE is located outside the irradiation range of the first light L1, and the sensing element SE can sense the second light L2 generated by the quantum dot material QD.
By means of the component modulation of the quantum dot material QD, the wavelength of the second light L2 can be determined according to the actual design. For example, the wavelength interval of the second light L2 may be narrower than the wavelength interval of the first light L1. According to practical designs, in some embodiments, the primary wavelength region (above 90% of the ratio) of the first light L1 is 400nm to 500nm, and the primary wavelength region (above 90% of the ratio) of the second light L2 is 350nm to 450nm. In other embodiments, the primary wavelength region (more than 90% by weight) of the first light L1 is 400nm to 500nm, and the primary wavelength region (more than 90% by weight) of the second light L2 is 350nm to 380nm.
Fig. 7 is a circuit diagram illustrating the sensing portion SP shown in fig. 1 according to an embodiment of the present invention. The sub-pixels 111-11 and 111-12 shown in fig. 7 are exemplary embodiments of two sub-pixels of the display panel 110 shown in fig. 1, but the implementation of the sub-pixels of the display panel 110 shown in fig. 1 is not limited to the embodiment shown in fig. 7. Depending on the actual design, the description of the subpixels 111-11 shown in FIG. 7 may be applicable to one or more of the other subpixels of the display panel 110 (e.g., subpixels 111-12 shown in FIG. 7).
The control terminal (gate) of the display portion DP of the sub-pixel 111-11 shown in FIG. 7 is coupled to the gate driver 130 via the gate line G1 of the display panel 110, and the data terminal (source) of the display portion DP of the sub-pixel 111-11 is coupled to the source driver 120 via the data line D1 of the display panel 110. By analogy, the control terminal (gate) of the sub-pixel 111-12 is coupled to the gate driver 130 via the gate line G2 of the display panel 110, and the data terminal (source) of the sub-pixel 111-12 is coupled to the source driver 120 via the data line D1 of the display panel 110. The display portion DP shown in fig. 7 can refer to the related descriptions of fig. 1, 2 or 3, and thus will not be described again.
The sensing portion SP shown in fig. 7 includes a quantum dot material QD (not shown in fig. 7), a sensing element SE, a sensing capacitor C71, and a reset switch SW71. The sensing capacitor C71 shown in fig. 7 can be referred to the description of the blue light sensing capacitor Csen shown in fig. 5. A first terminal of the sensing capacitor C71 is coupled to a first terminal of the sensing element SE. The second end of the sensing element SE is coupled to the sensing line S1 of the display panel 110. The quantum dot material QD may be excited by the first blue light component of the first light L1 from the display portion DP to generate the second light L2. According to practical designs, the quantum dot material, the display portion DP, the first light L1 and the second light L2 in the embodiment of fig. 7 can be described with reference to the quantum dot material QD, the display portion DP, the first light L1 and the second light in the embodiment of fig. 5, or the quantum dot material QD, the display portion DP, the first light L1 and the second light L2 in the embodiment of fig. 6. The sensing element SE may sense the second light L2 generated by the quantum dot material QD, wherein the second light L2 affects the leakage current of the sensing element SE. The description regarding the sensing element SE shown in fig. 7 may be applied to the sensing element SE shown in fig. 5 or 6 according to actual designs.
During the reset, the sensing capacitor C71 is charged. During sensing, the sensing element SE leaks the charge of the sensing capacitor C71 based on the leakage current influenced by the second light L2 generated by the quantum dot material QD. During the readout period, the sensing element SE is turned on, so the processing circuit 140 can detect the charge amount (sensing result) of the sensing capacitor C71 via the sensing line S1 and the sensing element SE.
The control terminal of the display portion DP and the control terminal of the sensing element SE are commonly coupled to the gate line G1 of the display panel 110. A first terminal of the reset switch SW71 is coupled to a first terminal of the sensing capacitor C71. The second end of the sensing capacitor C71 is coupled to the reference voltage Vref. According to practical designs, the reference voltage Vref can be the reference voltage VSS, the common voltage VCOM, or other fixed voltages. The second terminal of the reset switch SW71 is commonly coupled to the data line D1 of the display panel 110 with the data terminal of the display portion DP. The control terminal of the reset switch SW71 is coupled to the gate line of the other sub-pixels of the display panel 110 (e.g., the gate line G2 of the sub-pixels 111-12 shown in FIG. 7).
Fig. 8 is a schematic diagram illustrating signal waveforms of the gate lines G1 and G2 and the sensing capacitor C71 shown in fig. 7 according to an embodiment of the present invention. Fig. 8 shows two display frame periods F81 and F82. In each frame period, the gate driver 130 scans the gate lines G1 to Gn (as shown in fig. 8). During the reset period RST (driving period of the gate line G2 in the frame period F81), the sensing element SE is turned off (turn off), and the reset switch SW71 is turned on (turn on) to charge the sensing capacitor C71. During sensing period SEN, reset switch SW71 and sensing element SE are turned off. The sensing element SE leaks the charge of the sensing capacitor C71 based on the leakage current influenced by the second light L2 generated by the quantum dot material QD, so that the voltage level of the sensing capacitor C71 is continuously reduced during the sensing period SEN. During the read period RO, the reset switch SW71 is turned off and the sensing element SE is turned on. Therefore, the processing circuit 140 can detect the charge amount (sensing result) of the sensing capacitor C71 through the sensing line S1 and the sensing element SE during the readout period RO.
In summary, at least one sub-pixel (sub-pixel circuit) of the display panel 110 includes a display portion DP and a sensing portion SP, wherein the sensing portion SP includes a quantum dot material QD and a sensing element SE. The quantum dot material QD is distinguishable from the first blue light component of the first light L1 from the display portion DP. The quantum dot material QD is excited by the first blue light component of the first light L1 to generate the second light. The sensing element SE may sense the second light. The processing circuit 140 can instantly know the intensity of the first blue light component from the display portion DP according to the sensing result of the sensing element SE. That is, the display panel 110 can self-sense a specific component (e.g., the first blue component) of the display screen without an additional sensor (external sensor).
Fig. 9 is a circuit diagram illustrating the sensing portion SP shown in fig. 1 according to another embodiment of the present invention. The sub-pixels 111-11 shown in fig. 9 can be referred to in the description of the sub-pixels 111-11 shown in fig. 1. The display portion DP shown in fig. 9 may refer to the related description of the display portion DP shown in fig. 1, 2, 3 or 7, and thus will not be described again. The sensing portion SP shown in fig. 9 includes a quantum dot material QD (not shown in fig. 9), a sensing element SE, and a sensing capacitor C91. According to practical designs, the embodiment of fig. 9 can refer to fig. 5 or the embodiment of fig. 6 for the quantum dot material QD, the sensing element SE, the sensing portion SP and the display portion DP. The sensing capacitor C91 shown in fig. 9 can be referred to the description of the blue light sensing capacitor Csen shown in fig. 5.
The control terminal of the display portion DP and the control terminal of the sensing element SE are commonly coupled to the gate line G1 of the display panel 110. A first end of the sensing capacitor C91 is coupled to the sensing element SE. The second terminal of the sensing capacitor C91 is coupled to the reference voltage Vref. The sensing element SE, the sensing capacitor C91 and the reference voltage Vref shown in fig. 9 can be referred to the related description of the sensing element SE, the sensing capacitor C71 and the reference voltage Vref shown in fig. 7, and thus the description thereof will not be repeated.
The first end of the sensing capacitor C91 is further coupled to the reset line RL1 of the display panel 110. During reset, sensing element SE is turned off and processing circuit 140 can recharge (reset) sensing capacitance C91 via reset line RL1. During sensing, sensing element SE remains off and sensing capacitor C91 is not charged by reset line RL1 (i.e., processing circuit 140 stops charging sensing capacitor C91). Based on the leakage current affected by the second light generated by the quantum dot material QD, the sensing element SE leaks the charge of the sensing capacitor C91. During read out, the sense capacitor C91 is not charged by the reset line RL1 and the sense element SE is on. Therefore, the processing circuit 140 can detect the charge amount (sensing result) of the sensing capacitor C91 via the sensing line S1 and the sensing element SE.
Fig. 10 is a circuit diagram illustrating the sensing portion SP shown in fig. 1 according to still another embodiment of the present invention. The sub-pixels 111-11 shown in fig. 10 can be referred to in the description of the sub-pixels 111-11 shown in fig. 1. The sub-pixels 111-11 and 111-12 shown in fig. 10 can be described with reference to the sub-pixels 111-11 and 111-12 shown in fig. 7. The display portion DP shown in fig. 10 can be described with reference to the display portion DP shown in fig. 1, 2, 3 or 7. The gate lines G1, G2, D1 and S1 shown in fig. 10 can refer to the gate lines G1, G2, D1 and S1 shown in fig. 7, and thus are not described again.
The sensing portion SP shown in fig. 10 includes a quantum dot material QD (not shown in fig. 10), a sensing element SE, and a sensing capacitor C101. According to practical designs, the embodiment of fig. 10 can refer to fig. 5 or the embodiment of fig. 6 for the quantum dot material QD, the sensing element SE, the sensing portion SP and the display portion DP. The sensing capacitor C101 shown in fig. 10 can be referred to the description of the blue light sensing capacitor Csen shown in fig. 5. The control terminal of the sensing element SE is coupled to the gate lines of the other sub-pixels of the display panel 110 (e.g., the gate line G2 of sub-pixels 111-12 shown in FIG. 10). The first end of the sensing capacitor C101 is coupled to the sensing element SE. The second terminal of the sensing capacitor C101 is coupled to the reference voltage Vref. The sensing element SE, the sensing capacitor C101 and the reference voltage Vref shown in fig. 10 can be referred to the related description of the sensing element SE, the sensing capacitor C71 and the reference voltage Vref shown in fig. 7, and thus are not repeated.
The first end of the sensing capacitor C101 is further coupled to the reset line RL1 of the display panel 110. The reset line RL1 shown in fig. 10 can be described with reference to the reset line RL1 shown in fig. 9. During reset, processing circuit 140 may recharge (reset) sensing capacitor C101 via reset line RL1. During sensing, the sensing element SE leaks the charge of the sensing capacitor C101 based on the leakage current influenced by the second light generated by the quantum dot material QD. During the readout period, the sensing element SE is turned on, so the processing circuit 140 can detect the charge amount (sensing result) of the sensing capacitor C101 via the sensing line S1 and the sensing element SE.
Fig. 11 is a circuit diagram illustrating the sensing portion SP shown in fig. 1 according to still another embodiment of the present invention. The sub-pixel 111-11, the display portion DP, the gate line G1 and the data line D1 shown in fig. 11 can be referred to the related description of the sub-pixel 111-11, the display portion DP, the gate line G1 and the data line D1 shown in fig. 1, 2, 3 or 7. The sensing line S1 shown in fig. 11 can refer to the related description of the sensing line S1 shown in fig. 7, and thus will not be repeated.
The sensing portion SP shown in fig. 11 includes a quantum dot material QD (not shown in fig. 11), a sensing element SE, and a sensing capacitor C111. According to practical designs, the embodiment of fig. 11 can refer to fig. 5 or the embodiment of fig. 6 for the quantum dot material QD, the sensing element SE, the sensing portion SP and the display portion DP. The sensing capacitor C111 shown in fig. 11 may refer to the description of the blue light sensing capacitor Csen shown in fig. 5. The first terminal of the sensing capacitor C111 shown in fig. 11 is coupled to the sensing element SE. The second terminal of the sensing capacitor C111 is coupled to the reference voltage Vref. The sensing element SE, the sensing capacitor C111 and the reference voltage Vref shown in fig. 11 can be referred to the related description of the sensing element SE, the sensing capacitor C71 and the reference voltage Vref shown in fig. 7, and thus are not repeated.
The control terminal of the sensing element SE is coupled to the readout control line CL1 of the display panel 110. Processing circuitry 140 may control sensing element SE via read control line CL1. The first end of the sensing capacitor C111 is further coupled to the reset line RL1 of the display panel 110. The reset line RL1 shown in fig. 11 can be described with reference to the reset line RL1 shown in fig. 9. During reset, processing circuit 140 turns off sensing element SE, and processing circuit 140 may charge (reset) sensing capacitance C111 via reset line RL1. During sensing, the sensing element SE leaks the charge of the sensing capacitor C111 based on the leakage current influenced by the second light generated by the quantum dot material QD. During the readout period, the processing circuit 140 turns on the sensing element SE, so that the processing circuit 140 can detect the charge amount (sensing result) of the sensing capacitor C111 via the sensing line S1 and the sensing element SE.
Fig. 12 is a schematic diagram illustrating signal waveforms of the gate line G1, the reset line RL1, the sensing line S1, the readout control line CL1 and the sensing capacitor C111 shown in fig. 11 according to an embodiment of the invention. Fig. 12 shows a plurality of display frame periods, wherein the drawing symbol "f12_1" represents one frame period, the drawing symbol "f12_k+2" represents another frame period, and the drawing symbol "k×f" represents K frame periods between the frame period f12_1 and the frame period. In each frame period, the gate driver 130 scans the gate lines G1 to Gn (as shown in fig. 12) of the display panel 110. During reset RST, processing circuit 140 turns off sensing element SE and processing circuit 140 charges sensing capacitor C111. During sensing period SEN, processing circuit 140 continuously turns off sensing element SE, and processing circuit 140 stops charging sense capacitance C111. Based on the leakage current influenced by the second light L2 generated by the quantum dot material QD, the sensing element SE leaks the charge of the sensing capacitor C111, so that the voltage level of the sensing capacitor C111 continuously decreases during the sensing period SEN. During the read period RO, the processing circuit 140 continues to stop charging the sensing capacitor C111, and the processing circuit 140 turns on the sensing element SE. Therefore, the processing circuit 140 can detect the charge amount (sensing result) of the sensing capacitor C111 through the sensing line S1 and the sensing element SE during the readout period RO.
Fig. 12 shows a plurality of read control lines CL1, CL2, …, CLn. That is, the control terminal (gate) of the sensing element SE of each of the sensing sections SP of the sub-pixels 111-11 to 111-mn is coupled to the processing circuit 140 via a corresponding one of the readout control lines CL 1-CLn. Although the readout control lines CL2 to CLn are not shown in fig. 11, these readout control lines CL2 to CLn can be analogized with reference to the description of the readout control line CL 1. The arrangement of these readout control lines CL1 to CLn in the display panel 110 can be analogized with reference to the arrangement of the gate lines G1 to Gn. In the frame period "F12_k+2", the processing circuit 140 can scan the read control lines CL 1-CLn (as shown in FIG. 12).
Fig. 13 is a circuit diagram illustrating the sensing portion SP shown in fig. 1 according to a further embodiment of the present invention. The sub-pixels 111-11 shown in fig. 13 can be referred to in the description of the sub-pixels 111-11 shown in fig. 1. The display portion DP shown in fig. 13 may refer to the related description of the display portion DP shown in fig. 1, 2, 3 or 7, and thus will not be described again. The sensing portion SP shown in fig. 13 includes a quantum dot material QD1 (not shown in fig. 13), a sensing element SE1, a sensing capacitor C131, a quantum dot material QD2 (not shown in fig. 13), a sensing element SE2, and a sensing capacitor C132. According to practical designs, the embodiment of fig. 13 may refer to fig. 5 or the embodiment of fig. 6 for the description of the sensing portion SP and the display portion DP. The sensing capacitor C131 and/or C132 shown in fig. 13 can be referred to in the description of the blue light sensing capacitor Csen shown in fig. 5.
The control terminal of the display portion DP, the control terminal of the sensing element SE1 and the control terminal of the sensing element SE2 are commonly coupled to the gate line G1 of the display panel 110. The first terminal of the sensing capacitor C131 is coupled to the first terminal of the sensing element SE 1. In the embodiment shown in fig. 13, the sensing line S1 includes a sensing line s1_1 and a sensing line s1_2. The second end of the sensing element SE1 is coupled to the sensing line S1_1 of the display panel 110. A first terminal of the sensing capacitor C132 is coupled to a first terminal of the sensing element SE 2. The second end of the sensing element SE2 is coupled to the sensing line S1_2 of the display panel 110. The second terminal of the sensing capacitor C131 and the second terminal of the sensing capacitor C132 are coupled to the reference voltage Vref. The sensing capacitor C132 and the sensing element SE1 shown in fig. 13 can be described with reference to the sensing capacitor C91 and the sensing element SE shown in fig. 9, and the sensing capacitor C132 and the sensing element SE2 shown in fig. 13 can be described with reference to the sensing capacitor C91 and the sensing element SE shown in fig. 9.
The first end of the sensing capacitor C131 and the first end of the sensing capacitor C132 are further coupled to the reset line RL1 of the display panel 110. During reset, sensing element SE1 and sensing element SE2 are turned off, and processing circuit 140 can charge (reset) sensing capacitor C131 and sensing capacitor C132 via reset line RL1.
During sensing, sensing element SE1 and sensing element SE2 remain turned off and sensing capacitor C131 and sensing capacitor C132 are not charged by reset line RL1 (i.e., processing circuit 140 stops charging sensing capacitor C131 and sensing capacitor C132). The quantum dot material QD1 may be excited by the first blue light component of the first light from the display part 110 to generate the second light. In some embodiments, the quantum dot material QD2 may be excited by the second blue component of the first light from the display part 110 to generate a third light (as shown in fig. 14). In other embodiments, the quantum dot material QD2 may be excited by ambient light to generate third light (as shown in fig. 15).
FIG. 14 is a schematic cross-sectional view illustrating the sub-pixel 111-11 shown in FIG. 13, in accordance with an embodiment of the present invention. Fig. 14 shows the control element 1420 and the display structure 1430 of the display portion DP, and the quantum dot material QD1, the sensing element SE1, the quantum dot material QD2 and the sensing element SE2 of the sensing portion SP. The display portion DP and the sensing portion SP shown in fig. 14 can be described with reference to the display portion DP and the sensing portion SP shown in fig. 1. The control element 1420 and the display structure 1430 shown in fig. 14 can be analogized with reference to the description of the transistor 220 and the light emitting element 230 shown in fig. 5, or the switch 310 and the lc capacitor 330 shown in fig. 6. The quantum dot material QD and the sensing element SE according to the embodiments shown in fig. 1 and fig. 4 can be described with reference to the quantum dot material QD1, the quantum dot material QD2, the sensing element SE1 and the sensing element SE2 shown in fig. 14.
The quantum dot material QD1 shown in fig. 14 and the quantum dot material QD2 can be described with reference to the quantum dot material QD shown in fig. 5. The quantum dot material QD1 is distinguishable from a first blue component of the first light L1, and the quantum dot material QD2 is distinguishable from a second blue component of the first light L1, wherein the first Lan Guangcheng and the second blue component each belong to different wavelength ranges. That is, a certain specific wavelength range (first blue light component) of the first light L1 easily excites the quantum dot material QD1, but other wavelength ranges of the first light L1 do not easily (even cannot) excite the quantum dot material QD1. Similarly, another specific wavelength range (second blue component) of the first light L1 easily excites the quantum dot material QD2, but other wavelength ranges of the first light L1 do not easily (even cannot) excite the quantum dot material QD2. By modulating the components of the quantum dot materials QD1 and QD2, the first Lan Guangcheng and the second blue light component can be determined according to practical designs. For example, in some embodiments, the first blue component may belong to a strongly damaging wavelength range (e.g., a blue wavelength range of 415-455 nm), while the second blue component may belong to a weakly damaging wavelength range (e.g., a blue wavelength range of 455-480 nm).
The quantum dot material QD1 may be excited by the first blue component of the first light L1 to generate a second light. Wherein the wavelength of the first blue light component of the first light L1 is different from the wavelength of the second light generated by the quantum dot material QD 1. The sensing element SE1 may sense the second light generated by the quantum dot material QD 1. The quantum dot material QD2 may be excited by the second blue light component of the first light L1 to generate a third light. Wherein the wavelength of the second blue light component of the first light L1 is different from the wavelength of the third light generated by the quantum dot material QD 2. The sensing element SE2 may sense the third light generated by the quantum dot material QD 2. Because the quantum dot materials QD1 and QD2 cover the sensing elements SE1 and SE2, the positions of the sensing elements SE1 and SE2 are outside the irradiation range of the first light L1.
Fig. 15 is a schematic cross-sectional view illustrating the sub-pixel 111-11 shown in fig. 13 in accordance with another embodiment of the present invention. Fig. 15 shows the control element 1520 and the display structure 1530 of the display portion DP, and shows the quantum dot material QD1, the sensing element SE1, the quantum dot material QD2 and the sensing element SE2 of the sensing portion SP. The display portion DP and the sensing portion SP shown in fig. 15 can be described with reference to the display portion DP and the sensing portion SP shown in fig. 1. The control element 1520 and the display structure 1530 shown in fig. 15 can be analogized with reference to the description of the transistor 220 and the light emitting element 230 shown in fig. 5, or with reference to the description of the switch 310 and the lc capacitor 330 shown in fig. 6. The quantum dot material QD and the sensing element SE according to the embodiments shown in fig. 1 and fig. 4 can be described with reference to the quantum dot material QD1, the quantum dot material QD2, the sensing element SE1 and the sensing element SE2 shown in fig. 15.
The quantum dot material QD1 shown in fig. 15 and the quantum dot material QD2 can be described with reference to the quantum dot material QD shown in fig. 5. The sensing element SE1, the quantum dot material QD1, the sensing element SE2 and the quantum dot material QD2 shown in fig. 15 can be referred to the related description of the sensing element SE1, the quantum dot material QD1, the sensing element SE2 and the quantum dot material QD2 shown in fig. 14. Unlike the embodiment shown in fig. 14, in the embodiment shown in fig. 15, the quantum dot material QD2 can be excited by ambient light Lamb to generate third light to the sensing element SE2. The sensing element SE1 and the quantum dot material QD1 shown in fig. 15 can be analogized with reference to the related description of the sensing element SE and the quantum dot material QD shown in fig. 5 (or fig. 6).
Please refer to fig. 13. Based on the leakage current influenced by the second light generated by the quantum dot material QD1, the sensing element SE1 leaks the charge of the sensing capacitor C131. Based on the leakage current affected by the third light generated by the quantum dot material QD2, the sensing element SE2 leaks the charge of the sensing capacitor C132. During sensing, sensing capacitor C131 and sensing capacitor C132 are not charged by reset line RL1, and sensing element SE1 and sensing element SE2 are conductive. Therefore, the processing circuit 140 can detect the charge amount of the sensing capacitor C131 (the first blue component sensing result) through the sensing line s1_1 and the sensing element SE1, and the processing circuit 140 can detect the charge amount of the sensing capacitor C132 (the second blue component sensing result) through the sensing line s1_2 and the sensing element SE2. The processing circuit 140 may compare the first blue light component sensing result with the second blue light component sensing result, or calculate a ratio of the first blue light component sensing result to the second blue light component sensing result.
In summary, the sensing portion SP of the sub-pixel (sub-pixel circuit) includes the quantum dot material QD1, the sensing element SE1, the quantum dot material QD2, and the sensing element SE2. The quantum dot material QD1 is distinguishable from the first blue light component of the first light L1 from the display portion DP. The quantum dot material QD1 is excited by the first blue component of the first light L1 to generate a second light to the sensing element SE1. In some embodiments, the quantum dot material QD2 is distinguishable from the second blue component of the first light L1 from the display portion DP. The quantum dot material QD2 is excited by the second blue component of the first light L1 to generate a third light to the sensing element SE2. In other embodiments, the quantum dot material QD2 is distinguishable from the ambient light Lamb. The quantum dot material QD2 is excited by the ambient light Lamb to generate a third light to the sensing element SE2. The processing circuit 140 can instantly know the intensity ratio of the first blue light component and the second blue light component of the first light L1 (or the intensity ratio of the first blue light component of the first light L1 and the ambient light Lamb) from the display portion DP according to the sensing results of the sensing elements SE1 and SE2. That is, the display panel 110 can self-sense a specific component (e.g., the first blue component) of the display screen without an additional sensor (external sensor).
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, but rather may be modified or altered somewhat by persons skilled in the art without departing from the spirit and scope of the invention.

Claims (7)

1. A display panel comprising a plurality of sub-pixels, at least one of the sub-pixels comprising:
a display unit;
a first quantum dot material configured to be excited by a first blue light component of a first light from the display portion to generate a second light; and
a first sensing element configured to sense the second light to obtain the intensity of the first blue light component according to the sensing result of the second light;
a light reflecting structure, a shading structure, and at least one of a second quantum dot material and a second sensing element;
the light reflecting structure is adapted to change a direction of a portion of the first light, wherein a first quantum dot material is disposed between the light reflecting structure and the first sensing element, and the first quantum dot material is excited by the first blue light component of the portion of the first light to generate the second light to the first sensing element; the first quantum dot material covers the first sensing element, and the light reflecting structure comprises a light-proof layer;
The light shielding structure is arranged on a first substrate side of the display panel, wherein the light shielding structure comprises the first quantum dot material, the first quantum dot material receives a part of the first light from a first direction, and the first quantum dot material generates the second light to the first sensing element in a second direction;
the second quantum dot material is configured to be excited by a second blue light component of the first light from the display portion to generate a third light, and the second sensing element is configured to sense the third light; wherein a wavelength of the first blue light component of the first light is different from a wavelength of the second light, and a wavelength of the second blue light component of the first light is different from a wavelength of the third light; the first quantum dot material has a discrimination property for the first blue light component of the first light, the second quantum dot material has a discrimination property for the second blue light component of the first light, and the first Lan Guangcheng and the second blue light components each belong to different wavelength ranges;
wherein a wavelength of the first blue light component of the first light is different from a wavelength of the second light, the first quantum dot material has a discrimination property for the first blue light component of the first light, and the first Lan Guangcheng and the second light each belong to different wavelength ranges.
2. The display panel of claim 1, wherein the first sensing element is located outside an illumination range of the first light.
3. The display panel of claim 1, wherein the first sensor element and the second sensor element are both located outside an irradiation range of the first light.
4. The display panel of claim 1, wherein the at least one subpixel further comprises:
a second quantum dot material configured to be excited by an ambient light to generate a third light; and
a second sensing element configured to sense the third light.
5. An operation method of a display panel, the display panel including a plurality of sub-pixels, at least one of the sub-pixels including a display portion, a first quantum dot material, a first sensing element, and at least one of a light reflecting structure, a light shielding structure, a second quantum dot material and a second sensing element, the operation method comprising:
exciting the first quantum dot material by a first blue light component of a first light from the display portion to generate a second light; and
sensing the second light by the first sensing element to obtain the intensity of the first blue light component according to the sensing result of the second light;
Wherein a wavelength of the first blue light component of the first light is different from a wavelength of the second light, the first quantum dot material has a discrimination property for the first blue light component of the first light, and the first Lan Guangcheng and the second light each belong to different wavelength ranges;
wherein the light reflecting structure comprises a light shielding layer, the first quantum dot material covers the first sensing element, and in case the at least one sub-pixel comprises the light reflecting structure, the operation method further comprises:
changing a direction of a portion of the first light by the light reflecting structure, wherein the first quantum dot material is disposed between the light reflecting structure and the first sensing element; and
exciting the first quantum dot material by the first blue light component of the portion of the first light to generate the second light for the first sensing element;
wherein the light shielding structure comprises the first quantum dot material, and in case the at least one sub-pixel comprises the light shielding structure, the operation method further comprises:
receiving a portion of the first light from a first direction by the first quantum dot material, and
generating the second light from the first quantum dot material to the first sensing element in a second direction;
Wherein, in case the at least one sub-pixel comprises the second quantum dot material and the second sensing element, the operation method further comprises:
exciting the second quantum dot material by a second blue light component of the first light from the display portion to generate a third light; and
sensing the third light by the second sensing element;
wherein a wavelength of the first blue light component of the first light is different from a wavelength of the second light, a wavelength of the second blue light component of the first light is different from a wavelength of the third light, the first quantum dot material has a discrimination property for the first blue light component of the first light, the second quantum dot material has a discrimination property for the second blue light component of the first light, and the first Lan Guangcheng and the second blue light components each belong to different wavelength ranges.
6. The method of claim 5, wherein the at least one sub-pixel further comprises a second quantum dot material and a second sensing element, and the method further comprises:
exciting the second quantum dot material by an ambient light to generate a third light; and
the third light is sensed by the second sensing element.
7. A sub-pixel of a display panel, comprising:
a display unit; and
a sensing portion including a first sensing capacitor, a first quantum dot material and a first sensing element, wherein a first end of the first sensing capacitor is coupled to a first end of the first sensing element, a second end of the first sensing element is coupled to a first sensing line of the display panel, the first quantum dot material is configured to be excited by a first blue light component of a first light from the display portion to generate a second light, the first sensing element is configured to sense the second light, so as to obtain an intensity of the first blue light component according to a sensing result of the second light, and the second light affects a first leakage current of the first sensing element;
wherein, during a reset period, the first sensing capacitor is charged; during a sensing period, the first sensing element leaks charge of the first sensing capacitor based on the first leakage current affected by the second light; and during a readout period, the first sensing element is turned on;
wherein, in the case that a control end of the display portion and a control end of the first sensing element are coupled to a first gate line of the display panel together, the sensing portion further includes:
A reset switch having a first end coupled to the first end of the first sensing capacitor, wherein a second end of the first sensing capacitor is coupled to a reference voltage, a second end of the reset switch and a data end of the display portion are coupled to a first data line of the display panel together, and a control end of the reset switch is coupled to a second gate line of a other sub-pixel of the display panel;
wherein, during the reset period, the reset switch is turned on to charge the first sensing capacitor, and the first sensing element is turned off; during the sensing period, the reset switch and the first sensing element are turned off; and during the readout, the reset switch is off;
wherein, in the case that a control end of the display part is coupled to a gate line of the display panel, a data end of the display part is coupled to a data line of the display panel, a control end of the first sensing element is coupled to a readout control line of the display panel, the first end of the first sensing capacitor is further coupled to a reset line of the display panel, and a second end of the first sensing capacitor is coupled to a reference voltage; wherein during the reset period, the first sensing capacitor is charged by the reset line, and the first sensing element is turned off; during the sensing period, the first sensing capacitor is not charged by the reset line, and the first sensing element is turned off; and during the sensing, the first sensing capacitor is not charged by the reset line;
Wherein, in the case that a control end of the display portion and a control end of the first sensing element are coupled to a gate line of the display panel together, a data end of the display portion is coupled to a data line of the display panel, the first end of the first sensing capacitor is also coupled to a reset line of the display panel, and a second end of the first sensing capacitor is coupled to a reference voltage; wherein, in the case that the sensing portion further includes a second sensing capacitor, a second quantum dot material and a second sensing element, a first end of the second sensing capacitor is coupled to a first end of the second sensing element, a second end of the second sensing element is coupled to a second sensing line of the display panel, the second quantum dot material is configured to be excited by a second blue component of the first light from the display portion to generate a third light, the second sensing element is configured to sense the third light, and the third light affects a second leakage current of the second sensing element, wherein a wavelength of the first blue component of the first light is different from a wavelength of the second light, a wavelength of the second blue component of the first light is different from a wavelength of the third light, the first quantum dot material has a property of distinguishing the first blue component of the first light, the second quantum dot material has a property of distinguishing the first blue component of the first light, and the second quantum dot material has a property of distinguishing the first blue component of the first blue component 62; the method comprises the steps of,
The control end of the display part, the control end of the first sensing element and the control end of the second sensing element are coupled to a gate line of the display panel together, the data end of the display part is coupled to a data line of the display panel, the first end of the first sensing capacitor and the first end of the second sensing capacitor are also coupled to a reset line of the display panel, and the second end of the first sensing capacitor and the second end of the second sensing capacitor are coupled to a reference voltage; wherein, during the reset period, the first sensing capacitor and the second sensing capacitor are charged by the reset line, and the first sensing element and the second sensing element are turned off; during the sensing, the first sensing capacitor and the second sensing capacitor are not charged by the reset line, the first sensing element and the second sensing element are turned off, and the second sensing element leaks charge of the second sensing capacitor based on the second leakage current affected by the third light; and during the readout period, the first sensing capacitor and the second sensing capacitor are not charged by the reset line, and the second sensing element is turned on.
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