WO2022116294A1 - 显示装置及其去噪方法 - Google Patents
显示装置及其去噪方法 Download PDFInfo
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- WO2022116294A1 WO2022116294A1 PCT/CN2020/137636 CN2020137636W WO2022116294A1 WO 2022116294 A1 WO2022116294 A1 WO 2022116294A1 CN 2020137636 W CN2020137636 W CN 2020137636W WO 2022116294 A1 WO2022116294 A1 WO 2022116294A1
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- Prior art keywords
- signal
- blank
- transistor
- display device
- denoising
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
- 206010034960 Photophobia Diseases 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 208000013469 light sensitivity Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
Definitions
- the present application relates to the field of display technology, and in particular, to a display device and a denoising method thereof.
- integrating a light sensor into a display panel can improve the degree of human-computer interaction, thereby increasing the overall added value of the display panel.
- the light sensor is integrated in the display panel
- the light sensor and the display panel use the same set of power supply and power IC (Integrated Circuit, chip).
- the noise specifications of the light sensor and the display panel are not exactly the same for the power IC.
- the noise of the power IC used is relatively large, such as 5% of the operating voltage, while the general light sensor requires the noise of the power IC to be controlled at 1% or lower.
- An existing display panel integrated with a light sensor directly adopts this type of IC, which will cause the signal sensed by the light sensor to have noise on the entire surface, which will seriously affect the sensing result.
- the present application provides a display device and a denoising method thereof, so as to alleviate the technical problem of noise occurring in an existing display panel integrated with a light sensor.
- An embodiment of the present application provides a display device, which includes a display panel and a denoising module, the denoising module is connected to the display panel, and the display panel is divided into a display area and a non-display area.
- the display panel includes a substrate, a display circuit and a light sensing circuit. Both the display circuit and the light sensing circuit are arranged on the substrate.
- the light sensing circuit includes a data column and a blank column.
- the data column is located in the display area, and the data column includes at least one sensing unit.
- the blank column is located in at least one of the non-display areas on both sides of the display area, and the blank column includes at least one blank unit.
- the sensing unit is used to provide a sensing signal
- the blank unit is used to provide a blank signal
- the denoising module is used to collect the sensing signal and the blank signal, and convert the sensing signal The blank signal is subtracted to obtain a denoised signal.
- the light sensing circuit further includes a reading module, the reading module is disposed in the non-display area, and the reading module is connected to the denoising module, And the reading module is also connected with the sensing unit and the blank unit for reading the sensing signal and the blank signal, and converting the sensing signal and the blank signal into digital signal for acquisition by the denoising module.
- the reading module is connected to the sensing unit and the blank unit through a reading line.
- the reading module is a COF bound on one side of the light sensing circuit.
- the sensing unit includes a first transistor, a first storage capacitor, and a second transistor, and the first storage capacitor is connected between a gate and a drain of the first transistor.
- the second transistor is connected between the first transistor and the reading module;
- the blank cell includes a third transistor, and the third transistor is connected with the reading module.
- the light sensing circuit further includes a first power supply line, a second power supply line and a scan line, wherein the blank column and the data column are both connected to the first power supply
- the lines are parallel, the scan lines are parallel to the second power lines, and the scan lines are perpendicular to the first power lines.
- the gate of the first transistor is connected to the second power line, the source of the first transistor is connected to the first power line, and the first transistor is connected to the second power line.
- the drain of a transistor is connected to one end of the first storage capacitor, the other end of the first storage capacitor is connected to the second power line, and the drain of the first transistor is also connected to the first storage capacitor.
- the source of the second transistor is connected, the gate of the second transistor is connected to the scan line, and the drain of the second transistor is connected to the reading module.
- the blank unit further includes a fourth transistor and a second storage capacitor, the fourth transistor is connected to the second storage capacitor, and the second storage capacitor is connected to the first storage capacitor. Three transistors are not connected.
- the display panel is a liquid crystal display panel or an OLED display panel.
- the display circuit and the light sensing circuit are arranged in different layers.
- the display panel further includes a plurality of pixels, and there is an interval between every two adjacent pixels, and the light sensing circuit is disposed relatively above the interval.
- the display circuit and the light sensing circuit are arranged in the same layer.
- the display device further includes a timing control board, and the denoising module is integrated on the timing control board.
- the denoising module includes a field programmable gate array.
- An embodiment of the present application further provides a denoising method for the display device according to one of the foregoing embodiments, the display device further includes a main board, and the denoising method includes the following steps: the reading module reads the The sensing signal of the data column and the blank signal of the blank column, and convert the sensing signal and the blank signal into a digital signal; the denoising module collects the The sensing signal and the blank signal are outputted to the mainboard; the mainboard receives the denoised signal and converts it into a corresponding touch signal or fingerprint identification signal.
- the reading module reads the sensing signal of the data column and the blank signal of the blank column through a reading line.
- the reading module is a COF bound on one side of the light sensing circuit.
- the denoising module collects the sensing signal and the blank signal converted into the digital signal, and outputs the denoising signal to the mainboard.
- the steps include: the de-noising module collects the sensing signal and the blank signal converted into the digital signal; the de-noising module subtracts the blank signal from the sensing signal to obtain the de-noising module. noise signal; the de-noising module transmits the de-noising signal to the main board through a communication protocol.
- the display device further includes a timing control board, and the denoising module is integrated on the timing control board.
- the denoising module includes a field programmable gate array.
- the display device and its denoising method provided by the present application set the light sensing circuits on the display panel into blank columns and data columns, and read the signals of the blank columns and data columns through a reading module.
- the de-noising module subtracts the signal of the blank column from the signal of the data column to obtain the de-noising signal, and transmits the de-noising signal to the main board. In this way, the noise of the display panel integrated with the light-sensing sensor is eliminated, and the accuracy of the sensing result of the light-sensing sensor is improved.
- FIG. 1 is a schematic diagram of a frame structure of a display device according to an embodiment of the present application.
- FIG. 2 is a schematic top-view structure diagram of a display panel provided by an embodiment of the present application.
- FIG. 3 is a schematic diagram of a first cross-sectional structure of a display panel provided by an embodiment of the present application.
- FIG. 4 is a schematic diagram of a first circuit connection of the light sensing circuit provided by the embodiment of the present application.
- FIG. 5 is a schematic diagram of a second circuit connection of the light sensing circuit provided by the embodiment of the present application.
- FIG. 6 is a schematic diagram of a second cross-sectional structure of a display panel provided by an embodiment of the present application.
- FIG. 7 is a schematic flowchart of a method for denoising a display device according to an embodiment of the present application.
- FIG. 1 is a schematic diagram of a frame structure of a display device provided by an embodiment of the present application
- FIG. 2 is a schematic top-view structure diagram of a display panel provided by an embodiment of the present application
- the display device 1000 includes a display panel 100 , a denoising module 200 and a main board 300 .
- the denoising module 200 is connected to the display panel 100 .
- the main board 300 is connected to the denoising module 200 .
- the display panel 100 is divided into a display area AA and a non-display area NA.
- the light sensing circuit 10 is integrated on the display panel 100 .
- the denoising module 200 is used to eliminate the noise generated by the light sensing circuit 10 . noise.
- the display panel 100 may be a liquid crystal display panel, an OLED display panel, or other display panels. Since the display panel 100 of the present application is integrated with the light-sensing sensing circuit 10, it can be applied to light-sensing application scenarios such as touch control, fingerprint recognition, and long-distance optical interaction.
- FIG. 3 is a first cross-sectional schematic diagram of a display panel provided by an embodiment of the present application.
- the display panel 100 includes a substrate 20 , a display circuit 30 and the light sensing circuit 10 .
- the display circuit 30 is arranged on the substrate 20, the light sensing circuit 10 is also arranged on the substrate 20, and the display circuit 30 and the light sensing circuit 10 are arranged in different layers, so the The light sensing circuit 10 is located above the display circuit 30 .
- the display circuit 30 is used for driving the pixels (not shown) of the display panel 100 to display.
- the light sensing circuit 10 is used to realize functions such as touch control and fingerprint recognition by sensing changes in light intensity.
- the display panel 100 further includes other functional layers disposed between the display circuit 30 and the light sensing circuit 10.
- the other functional layers may be light-emitting layers, encapsulation layer, etc.
- the light sensing circuit 10 is disposed on these functional layers. In order to prevent the light sensing circuit 10 from affecting the light transmittance of the display panel 100, the light sensing circuit 10 needs to avoid the display panel. 100 pixels.
- the light sensing circuit 10 may be disposed relatively above the interval of the pixels of the display panel 100 .
- the light sensing circuit 10 includes a blank column FA, a data column DA and a reading module 40 .
- the data column DA is located in the display area AA, and a plurality of photosensors 50 are arranged in the data column DA.
- the photosensors 50 may be phototransistors, which can convert the received optical signals into electrical signals. , to achieve touch, fingerprint recognition and other functions.
- the data columns DA may be multiple columns, and the specific number of columns may be determined according to the number of light sensing sensors 50 to be provided on the display panel 100 .
- the blank column FA is located in any of the non-display areas NA on both sides of the display area AA, the number of columns of the blank column FA is at least one row, and the photosensor 50 is not disposed in the blank column FA. It can be understood that, when the number of columns of the blank columns FA is two, the blank columns FA of the two columns may be respectively arranged in the two non-display areas NA. Setting the blank column FA in the non-display area NA can avoid affecting the light sensitivity of the light sensor 50 in the display area AA. It should be noted that the number of blank columns and the number of data columns shown in FIG. 2 is only for convenience in describing the embodiments of the present application, but the present application is not limited thereto.
- FIG. 4 is a schematic diagram of the first circuit connection of the light sensing circuit provided by the embodiment of the present application.
- the data array DA includes at least one sensing unit 60 for providing sensing signals.
- the blank column FA includes at least one blank cell 70 for providing blank signals.
- the reading module 40 is connected to the denoising module 200, and the reading module 40 is also connected to the sensing unit 60 and the blank unit 70 for reading the sensing signal and the blanking unit 70. blank signal, and convert the sensing signal and the blank signal into digital signals for the denoising module 200 to collect.
- the reading module 40 may be a COF (chip on film, chip on film) bound on one side of the light sensing circuit 10 .
- the de-noising module 200 is configured to collect the sensing signal and the blank signal converted into a digital signal, and subtract the blank signal from the sensing signal to obtain a de-noised signal.
- the sensing unit 60 includes a first transistor T1 , a first storage capacitor C1 and a second transistor T2 , wherein the first transistor T1 is the light sensor 50 .
- the first transistor T1 is used for sensing the change of light intensity.
- the second transistor T2 is a switch transistor.
- the first storage capacitor C1 is connected between the gate and the drain of the first transistor T1
- the second transistor T2 is connected between the first transistor and the reading module 40 .
- the blank unit 70 includes a third transistor T3 , which is also a switching transistor, and is connected to the reading module 40 .
- the first transistor T1 , the second transistor T2 , and the third transistor T3 can all be thin film transistors (Thin Film Transistor, TFT). It can be understood that, the sensing unit 60 is provided with the light sensing sensor 50 , while the blank unit 70 is not provided with the light sensing sensor 50 .
- TFT Thin Film Transistor
- the light sensing circuit further includes a first power supply line VDD, a second power supply line VGG and a scan line Scan, wherein the blank column FA and the data column DA are both connected to the A power line VDD is parallel, the scan line Scan is parallel to the second power line VGG, and the scan line Scan is perpendicular to the first power line VDD.
- Both the first power line VDD and the second power line VGG provide a constant DC voltage.
- the gate of the first transistor T1 is connected to the second power supply line VGG, the source of the first transistor T1 is connected to the first power supply line VDD, and the first transistor T1
- the drain is connected to one end of the first storage capacitor C1, the other end of the first storage capacitor C1 is connected to the second power line VGG, and the drain of the first transistor T1 is also connected to
- the source of the second transistor T2 is connected, the gate of the second transistor T2 is connected to the scan line Scan, and the drain of the second transistor T2 is connected to the reading module 40 .
- the reading module 40 is connected to the drain of the second transistor T2 through a reading line READ to read the sensing signal of the sensing unit 60 .
- the read line READ is connected to the second transistors T2 of the plurality of sensing units 60 (only one sensing unit 60 is shown in the figure as an example).
- the second power supply line VGG provides a voltage to the gate of the first transistor T1, so that the source and the drain of the first transistor T1 are turned on. When the channel is irradiated by light, a photo-generated leakage current is generated, and different degrees of leakage current are generated according to the degree of light intensity.
- the electrical signal of the first power supply line VDD flows from the source to the drain of the first transistor T1, and reaches one end of the first storage capacitor C1, and is drained by light in the channel of the first transistor T1. changes due to current.
- the other end of the first storage capacitor C1 is connected to the second power line VGG. At this time, the first storage capacitor C1 is in a charged state, and the charged voltage includes the information of light sensitivity.
- one end of the first storage capacitor C1 connected to the drain of the first transistor T1 is also connected to the source of the second transistor T2.
- the scan line Scan provides the gate of the second transistor T2
- the voltage stored in the first storage capacitor C1 flows to the drain through the source of the second transistor T2, so that the first storage capacitor C1 C1 is discharged through the second transistor T2 and flows to the read module 40 through the read line READ.
- the electrical signal obtained by the reading module 40 is the sensing signal, and the reading module 40 is configured to convert the sensing signal from an electrical signal into a digital signal for the denoising module 200 to collect.
- the reading module 40 reads the blank signal of the blank cell 70 through another reading line READ.
- the gate of the third transistor T3 in the blank unit 70 is connected to the scan line Scan
- the drain of the third transistor T3 is connected to the read line READ
- the third transistor T3 is connected to the read line READ.
- the source of T3 is off.
- the scan line Scan supplies a voltage to the gate of the third transistor T3 to turn on the source and drain of the third transistor T3, no signal is given to the read line READ.
- an electrical signal is generated by coupling between the read line READ and other nearby lines, such as the signal of the line on the display circuit 30 or the noise on the first power line VDD or the scan line Scan.
- the electrical signal is also a noise signal, and the electrical signal flows to the read module 40 through the read line READ.
- the electrical signal obtained by the reading module 40 is the blank signal, and the reading module 40 is configured to convert the blank signal from an electrical signal into a digital signal for the denoising module 200 to collect.
- the de-noising module 200 is configured to collect the sensing signal and the blank signal converted into a digital signal, and subtract the blank signal from the sensing signal to obtain a de-noising signal, and denoise the signal.
- the de-noising signal is transmitted to the main board 300 .
- the mainboard 300 is used to convert the de-noising signal into a corresponding touch signal or fingerprint identification signal and perform subsequent processing, such as merging the position indicated by the touch signal with the video signal of the display panel 100 in the display. displayed on the panel 100 .
- the denoising module 200 includes a Field-Programmable Gate Array (Field-Programmable Gate Array). Gate Array, FPGA), also known as universal IC.
- the denoising module 200 may be set independently, or may be integrated on the timing control (Timing Control, Tcon) board 400 of the display device 1000 .
- the motherboard 300 is also an SOC motherboard (System on Chip, system on chip) of the display device 1000 .
- the SOC mainboard can be connected to the timing control board 400 through an I2C interface or an SPI interface.
- the working principle of the light sensing circuit 10 is as follows: the first power line VDD and the second power line VGG are constant voltage voltage sources, and the sensing unit 60 of the data column DA
- the first transistor T1 is always on, and charges the first capacitor C1.
- Switch Transistor The second transistor T2 is an addressing switch, and the scan line Scan controls the second transistor T2 to be turned on row by row to detect the first capacitor C1.
- the leakage current of the first transistor T1 increases, so that the capacitance of the first capacitor C1 changes.
- the second transistor T2 detects the change of the first capacitance C1.
- the sensing signal read by the read line READ from the second transistor T2 is the sensing signal generated by the first transistor T1 due to illumination, and
- the blank cells 70 of the blank column FA are not affected by light irradiation because the photosensors are not provided, and the blank signal read by the read line READ from the third transistor T3 remains unchanged.
- the reading module 40 reads the sensing signal and the blank signal, and converts the sensing signal and the blank signal into digital signals for the denoising module 200 to collect.
- the de-noising module 200 is configured to collect the sensing signal and the blank signal converted into a digital signal, and subtract the blank signal from the sensing signal to obtain a de-noised signal.
- the leakage current of the first transistor T1 in the corresponding sensing unit 60 remains unchanged, and the read line READ reads from the corresponding second transistor T2
- the magnitude of the received sensing signal is different from the magnitude of the sensing signal read from the second transistor T2 of the data column DA illuminated by light, so as to determine the photosensitive position of the display device.
- the light-sensing circuit 10 integrated on the display panel 100 is set as the blank column FA and the data column DA, and the reading module 40 reads the blank column FA and the data column DA. Signal.
- the de-noising module 200 is used for subtracting the blank signal of the blank row FA from the sensing signal of the data row DA to obtain a de-noised signal, and transmits the de-noised signal to the main board 300 . In this way, the noise occurring in the display panel 100 integrated with the light-sensing sensor is eliminated, and the accuracy of the sensing result of the light-sensing sensor is improved.
- the blank cell 70 ′ further includes a fourth transistor T4 and a second storage capacitor C2 .
- FIG. 5 is a light sensor provided by the present application.
- the gate of the fourth transistor T4 is connected to the second power line VGG, the source of the fourth transistor T4 is connected to the first power line VDD, and the drain of the fourth transistor T4 is connected to the One end of the second storage capacitor C2 is connected to the second power supply line VGG, the other end of the second storage capacitor C2 is connected to the second power supply line VGG, the gate of the third transistor T3 is connected to the scan line Scan, and the third The drain of the transistor T3 is connected to the reading module 40 .
- the reading module 40 reads the blank signal of the blank cell 70' through the read line READ.
- the gate of the third transistor T3 in the blank cell 70' is connected to the scan line Scan
- the drain of the third transistor T3 is connected to the read line READ
- the third transistor T3 is connected to the read line READ.
- the source of the transistor T3 is not connected to the second storage capacitor C2.
- the scan line Scan supplies a voltage to the gate of the third transistor T3 to turn on the source and drain of the third transistor T3, no signal is given to the read line READ.
- the read line READ is coupled with signals of other nearby lines to generate an electrical signal, and the electrical signal flows to the read module 40 through the read line READ.
- the blank column in this embodiment is also provided with a light sensor, that is, the fourth transistor T4, but different from the data column, the fourth transistor T4 (light sensor) of the blank column is not connected to the switch transistor. (ie, the third transistor T3 ), so regardless of whether the blank cells 70 ′ in the blank column receive light, the blank signals read by the reading module from the blank cells 70 ′ are all background noises.
- the fourth transistor T4 light sensor
- FIG. 6 is a second schematic cross-sectional view of the display panel provided by the embodiment of the present application.
- the display circuit 30 of the display panel 101 and the light sensing circuit 10 are arranged in the same layer.
- the display panel 101 includes a substrate 20 , a display circuit 30 and the light sensing circuit 10 .
- the display circuit 30 is disposed on the substrate 20
- the light sensing circuit 10 is also disposed on the substrate 20
- the display circuit 30 and the light sensing circuit 10 are disposed on the same layer.
- the signal lines (eg, the first power line VDD, the second power line VGG, and the scan line Scan) of the light sensing circuit 10 can be multiplexed with corresponding signal lines in the display circuit 30 .
- the signal lines eg, the first power line VDD, the second power line VGG, and the scan line Scan
- FIG. 7 is a schematic flowchart of a denoising method for a display device provided by an embodiment of the present application.
- the denoising method includes the following steps:
- Step S10 the reading module reads the sensing signal of the data column and the blank signal of the blank column, and converts the sensing signal and the blank signal into a digital signal;
- the reading module 40 is connected to the drain of the second transistor T2 through a reading line READ to read the sensing signal of the sensing unit 60 .
- the second power line VGG provides a voltage to the gate of the first transistor T1 to turn on the source and the drain of the first transistor T1, and the channel of the first transistor T1
- the light-induced leakage current is generated due to the light irradiation, and different degrees of leakage current are generated according to the degree of light intensity.
- the electrical signal of the first power supply line VDD flows from the source to the drain of the first transistor T1, and reaches one end of the first storage capacitor C1, and is drained by light in the channel of the first transistor T1. changes due to current.
- the other end of the first storage capacitor C1 is connected to the second power line VGG. At this time, the first storage capacitor C1 is in a charged state, and the charged voltage includes the information of light sensitivity. At the same time, one end of the first storage capacitor C1 connected to the drain of the first transistor T1 is also connected to the source of the second transistor T2.
- the scan line Scan provides the gate of the second transistor T2 When the voltage turns on the source and drain of the second transistor T2, the voltage stored in the first storage capacitor C1 flows to the drain through the source of the second transistor T2, so that the first storage capacitor C1 C1 is discharged through the second transistor T2 and flows to the read module 40 through the read line READ.
- the reading module 40 reads the blank signal of the blank cell 70 through another reading line READ.
- the gate of the third transistor T3 in the blank cell 70 is connected to the scan line Scan
- the drain of the third transistor T3 is connected to the read line READ
- the third transistor The source of T3 is off.
- the scan line Scan supplies a voltage to the gate of the third transistor T3 to turn on the source and drain of the third transistor T3, no signal is given to the read line READ.
- the read line READ is coupled with signals of other nearby lines to generate an electrical signal, and the electrical signal flows to the read module 40 through the read line READ.
- Step S20 the de-noising module collects the sensing signal and the blank signal converted into the digital signal, and outputs the de-noising signal to the motherboard;
- the denoising module 200 collects the sensing signal and the blank signal converted into the digital signal; the denoising module 200 subtracts the blank from the sensing signal The signal obtains the de-noising signal; the de-noising module 200 transmits the de-noising signal to the main board 300 through a communication protocol.
- the denoising module 200 includes a field programmable gate array, that is, a universal IC.
- the denoising module 200 can be set independently or integrated on the timing control board 400 of the display device 1000 .
- Step S30 The mainboard receives the de-noising signal and converts it into a corresponding touch signal or fingerprint identification signal.
- the mainboard 300 converts the de-noising signal into a corresponding touch signal or fingerprint identification signal and performs subsequent processing, for example, compares the position indicated by the touch signal with the display panel 100
- the video signal is fused and displayed on the display panel 100 .
- the present application provides a display device and a denoising method thereof.
- the display device includes a display panel, a denoising module and a mainboard.
- the display panel includes a photosensitive array and a reading module, and is divided into a display area and a non-display area.
- the photosensitive array includes blank columns and data columns, the blank columns are located in at least one of the non-display areas on both sides of the display area, and the data columns are located in the display area.
- the reading module is arranged in the non-display area. The reading module is used for reading the sensing signal of the data column and the blank signal of the blank column.
- the de-noising module is used for subtracting the blank signal of the blank row from the sensing signal of the data row to obtain a de-noising signal, and transmitting the de-noising signal to the main board. To eliminate the noise of the display panel integrated with the light sensor.
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
公开了一种显示装置及其去噪方法。显示装置包括显示面板、去噪模块以及主板。显示面板上的光感传感电路包括空白列(FA)、数据列(DA)以及读取模块(40)。读取模块读取数据列(DA)的传感信号和空白列(FA)的空白信号。去噪模块将传感信号减去空白信号以得到去噪信号,并把去噪信号传递给主板,以消除集成有光感传感器的显示面板出现的噪声。
Description
本申请涉及显示技术领域,尤其涉及一种显示装置及其去噪方法。
随着显示技术的发展,人们不仅对显示产品的画质有了更高的要求,更对显示产品应用场景的扩展有了更多的需求。例如将光感传感器集成于显示面板,可以提升人机交互的程度,从而提升显示面板的整体附加价值。在光感传感器集成于显示面板的同时,光感传感器与显示面板采用了同一套的供电源及电源IC(Integrated Circuit,芯片)。然而,由于工作原理的不同,光感传感器和显示面板对电源IC的噪声规格要求不完全一致。例如常规显示时,用到的电源IC噪声较大,比如是工作电压的5%,而一般的光感传感器需求电源IC的噪声控制在1%或者更低。现有集成有光感传感器的显示面板直接采用这类IC,将造成光传感器感测的信号出现整面的噪声,严重影响感测的结果。
因此,现有集成有光感传感器的显示面板出现噪声的问题需要解决。
本申请提供一种显示装置及其去噪方法,以缓解现有集成有光感传感器的显示面板出现噪声的技术问题。
为解决上述问题,本申请提供的技术方案如下:
本申请实施例提供一种显示装置,其包括显示面板和去噪模块,所述去噪模块和所述显示面板连接,所述显示面板划分为显示区和非显示区。所述显示面板包括基板、显示电路以及光感传感电路。所述显示电路和所述光感传感电路均设置于所述基板上。其中,所述光感传感电路包括数据列和空白列。所述数据列位于所述显示区内,所述数据列包括至少一个传感单元。所述空白列位于所述显示区两侧的至少一个所述非显示区内,所述空白列包括至少一个空白单元。其中,所述传感单元用于提供传感信号,所述空白单元用于提供空白信号,所述去噪模块用于采集所述传感信号和所述空白信号,并将所述传感信号减去所述空白信号以得到去噪信号。
在本申请实施例提供的显示装置中,所述光感传感电路还包括读取模块,所述读取模块设置于所述非显示区,所述读取模块与所述去噪模块连接,且所述读取模块还与所述传感单元和所述空白单元连接,用于读取所述传感信号和所述空白信号,并把所述传感信号和所述空白信号转换成数字信号以供所述去噪模块采集。
在本申请实施例提供的显示装置中,所述读取模块通过读取线与所述传感单元和所述空白单元连接。
在本申请实施例提供的显示装置中,所述读取模块为绑定在所述光感传感电路一侧的COF。
在本申请实施例提供的显示装置中,所述传感单元包括第一晶体管、第一存储电容以及第二晶体管,所述第一存储电容连接于所述第一晶体管的栅极与漏极之间,所述第二晶体管连接于所述第一晶体管与所述读取模块之间;所述空白单元包括第三晶体管,所述第三晶体管与所述读取模块连接。
在本申请实施例提供的显示装置中,所述光感传感电路还包括第一电源线、第二电源线以及扫描线,其中所述空白列和所述数据列均与所述第一电源线平行,所述扫描线与所述第二电源线平行,且所述扫描线与所述第一电源线垂直。
在本申请实施例提供的显示装置中,所述第一晶体管的所述栅极与所述第二电源线连接,所述第一晶体管的源极与所述第一电源线连接,所述第一晶体管的所述漏极与所述第一存储电容的一端连接,所述第一存储电容的另一端与所述第二电源线连接,且所述第一晶体管的所述漏极还与所述第二晶体管的源极连接,所述第二晶体管的栅极与所述扫描线连接,所述第二晶体管的漏极与所述读取模块连接。
在本申请实施例提供的显示装置中,所述空白单元还包括第四晶体管和第二存储电容,所述第四晶体管与所述第二存储电容连接,所述第二存储电容与所述第三晶体管不连接。
在本申请实施例提供的显示装置中,所述显示面板为液晶显示面板或OLED显示面板。
在本申请实施例提供的显示装置中,所述显示电路和所述光感传感电路不同层设置。
在本申请实施例提供的显示装置中,所述显示面板还包括多个像素,每相邻的两个所述像素之间具有间隔,所述光感传感电路设置于所述间隔的相对上方。
在本申请实施例提供的显示装置中,所述显示电路和所述光感传感电路同层设置。
在本申请实施例提供的显示装置中,所述显示装置还包括时序控制板,所述去噪模块集成在所述时序控制板上。
在本申请实施例提供的显示装置中,所述去噪模块包括现场可编程门阵列。
本申请实施例还提供一种用于前述实施例其中之一的显示装置的去噪方法,所述显示装置还包括主板,所述去噪方法包括以下步骤:所述读取模块读取所述数据列的所述传感信号和所述空白列的所述空白信号,并把所述传感信号和所述空白信号转换成数字信号;所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号,并输出去噪信号给所述主板;所述主板接收所述去噪信号,并转换成对应的触控信号或指纹识别信号。
在本申请实施例提供的显示装置的去噪方法中,所述读取模块通过读取线读取所述数据列的所述传感信号和所述空白列的所述空白信号。
在本申请实施例提供的显示装置的去噪方法中,所述读取模块为绑定在所述光感传感电路一侧的COF。
在本申请实施例提供的显示装置的去噪方法中,所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号,并输出去噪信号给所述主板的步骤,包括:所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号;所述去噪模块将所述传感信号减去所述空白信号得到所述去噪信号;所述去噪模块通过通讯协议把所述去噪信号传递给所述主板。
在本申请实施例提供的显示装置的去噪方法中,所述显示装置还包括时序控制板,所述去噪模块集成在所述时序控制板上。
在本申请实施例提供的显示装置的去噪方法中,所述去噪模块包括现场可编程门阵列。
本申请提供的显示装置及其去噪方法把显示面板上的光感传感电路设置成空白列和数据列,并通过读取模块读取空白列和数据列的信号。去噪模块用数据列的信号减去空白列的信号得到去噪信号,并把去噪信号传递给主板。以此消除了集成有光感传感器的显示面板出现的噪声,提高了光感传感器的感测结果的准确性。
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的显示装置的框架结构示意图。
图2为本申请实施例提供的显示面板的俯视结构示意图。
图3为本申请实施例提供的显示面板的第一种剖面结构示意图。
图4为本申请实施例提供的光感传感电路的第一种电路连接示意图。
图5为本申请实施例提供的光感传感电路的第二种电路连接示意图。
图6为本申请实施例提供的显示面板的第二种剖面结构示意图。
图7为本申请实施例提供的显示装置的去噪方法的流程示意图。
以下各实施例的说明是参考附加的图示,用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本申请,而非用以限制本申请。在图中,结构相似的单元是用以相同标号表示。在附图中,为了清晰理解和便于描述,夸大了一些层和区域的厚度。即附图中示出的每个组件的尺寸和厚度是任意示出的,但是本申请不限于此。
请参照图1和图2,图1为本申请实施例提供的显示装置的框架结构示意图,图2为本申请实施例提供的显示面板的俯视结构示意图。所述显示装置1000包括显示面板100、去噪模块200以及主板300。所述去噪模块200与所述显示面板100连接。所述主板300与所述去噪模块200连接。所述显示面板100划分为显示区AA和非显示区NA,所述显示面板100上集成有光感传感电路10,所述去噪模块200用于消除所述光感传感电路10产生的噪声。所述显示面板100可以为液晶显示面板、OLED显示面板等其他显示面板。本申请的显示面板100因集成有所述光感传感电路10,可以应用到触控、指纹识别、远距离光学交互等感光的应用场景。
具体的,请参照图3,图3为本申请实施例提供的显示面板的第一种剖面示意图。所述显示面板100包括基板20、显示电路30以及所述光感传感电路10。所述显示电路30设置于所述基板20上,所述光感传感电路10也设置在所述基板20上,且所述显示电路30和所述光感传感电路10不同层设置,所述光感传感电路10位于所述显示电路30的上方。所述显示电路30用于驱动所述显示面板100的像素(图未示出)进行显示。所述光感传感电路10用于通过感测光强的变化实现触控、指纹识别等功能。
可以理解的是,所述显示面板100还包括设置在所述显示电路30和所述光感传感电路10之间的其他功能层,以OLED显示面板为例,其他功能层可以为发光层、封装层等。所述光感传感电路10设置在这些功能层上面,为了避免所述光感传感电路10影响所述显示面板100的透光率,所述光感传感电路10需避让所述显示面板100的像素。例如可以将所述光感传感电路10设置在所述显示面板100的像素的间隔的相对上方。
请继续参照图2,所述光感传感电路10包括空白列FA、数据列DA以及读取模块40。所述数据列DA位于所述显示区AA内,所述数据列DA内设置有多个光感传感器50,所述光感传感器50可为光敏晶体管,能够把接收到的光信号转换成电信号,以实现触控、指纹识别等功能。所述数据列DA可以为多列,具体的列数可根据显示面板100需要设置的光感传感器50数量确定。所述空白列FA位于所述显示区AA两侧的任一所述非显示区NA内,所述空白列FA的列数至少为一列,且所述空白列FA内未设置光感传感器50。可以理解的是,当所述空白列FA的列数为两列时,可以把两列所述空白列FA分别设置在两个所述非显示区NA内。把空白列FA设置在非显示区NA,能够避免影响显示区AA内光感传感器50的感光。需要说明的是,图2示出的空白列列数和数据列列数,仅为方便描述本申请的实施例,但本申请不限于此。
具体地,请参照图1和图4,图4为本申请实施例提供的光感传感电路的第一种电路连接示意图。所述数据列DA包括至少一个传感单元60,所述传感单元60用于提供传感信号。所述空白列FA包括至少一个空白单元70,所述空白单元70用于提供空白信号。所述读取模块40与所述去噪模块200连接,且所述读取模块40还与所述传感单元60和所述空白单元70连接,用于读取所述传感信号和所述空白信号,并把所述传感信号和所述空白信号转换成数字信号以供所述去噪模块200采集。所述读取模块40可为绑定在光感传感电路10一侧的COF(chip on film,覆晶薄膜)。所述去噪模块200用于采集转换成数字信号后的所述传感信号和所述空白信号,并将所述传感信号减去所述空白信号以得到去噪信号。
具体地,所述传感单元60包括第一晶体管T1、第一存储电容C1以及第二晶体管T2,其中所述第一晶体管T1即为所述光感传感器50。所述第一晶体管T1用于感知光强的变化。所述第二晶体管T2为开关晶体管。所述第一存储电容C1连接于所述第一晶体管T1的栅极与漏极之间,所述第二晶体管T2连接于所述第一晶体管与所述读取模块40之间。所述空白单元70包括第三晶体管T3,所述第三晶体管T3也为开关晶体管,且所述第三晶体管T3与所述读取模块40连接。所述第一晶体管T1、所述第二晶体管T2、所述第三晶体管T3均可为薄膜晶体管(Thin Film Transistor,TFT)。可以理解的是,所述传感单元60设置有所述光感传感器50,而所述空白单元70未设置所述光感传感器50。
具体地,继续参照图4,所述光感传感电路还包括第一电源线VDD、第二电源线VGG以及扫描线Scan,其中所述空白列FA和所述数据列DA均与所述第一电源线VDD平行,所述扫描线Scan与所述第二电源线VGG平行,且所述扫描线Scan与所述第一电源线VDD垂直。所述第一电源线VDD和所述第二电源线VGG均提供恒定的直流电压。
具体地,所述第一晶体管T1的所述栅极与所述第二电源线VGG连接,所述第一晶体管T1的源极与所述第一电源线VDD连接,所述第一晶体管T1的所述漏极与所述第一存储电容C1的一端连接,所述第一存储电容C1的另一端与所述第二电源线VGG连接,且所述第一晶体管T1的所述漏极还与所述第二晶体管T2的源极连接,所述第二晶体管T2的栅极与所述扫描线Scan连接,所述第二晶体管T2的漏极与所述读取模块40连接。
所述读取模块40通过读取线READ与所述第二晶体管T2的漏极连接,以读取所述传感单元60的传感信号。具体地,读取线READ与多个所述传感单元60的所述第二晶体管T2连接(图中仅绘示一个传感单元60为例)。具体地,所述第二电源线VGG给所述第一晶体管T1的栅极提供电压,使所述第一晶体管T1的所述源极和所述漏极导通,所述第一晶体管T1的沟道因被光照射而产生光生漏电流,并依光强的程度产生不同程度的漏电流。所述第一电源线VDD的电信号从所述第一晶体管T1的源极流向漏极,并到达所述第一存储电容C1的一端,并因所述第一晶体管T1的沟道的光生漏电流而产生变化。所述第一存储电容C1的另一端连接所述第二电源线VGG,则此时所述第一存储电容C1处于充电状态,其充电的电压包含光感的信息。同时所述第一存储电容C1与所述第一晶体管T1的漏极连接的一端还连接所述第二晶体管T2的源极,当所述扫描线Scan给所述第二晶体管T2的栅极提供电压使所述第二晶体管T2的源极和漏极导通时,则所述第一存储电容C1存储的电压通过所述第二晶体管T2的源极流向漏极,使得所述第一存储电容C1通过所述第二晶体管T2放电,并经过所述读取线READ流向所述读取模块40。所述读取模块40得到的电信号即为所述传感信号,所述读取模块40用于把所述传感信号由电信号转换成数字信号以供所述去噪模块200采集。
进一步地,所述读取模块40通过另一读取线READ读取所述空白单元70的空白信号。具体的,所述空白单元70内的所述第三晶体管T3的栅极与所述扫描线Scan连接,所述第三晶体管T3的漏极与所述读取线READ连接,所述第三晶体管T3的源极处于断开状态。当所述扫描线Scan给所述第三晶体管T3的栅极提供电压使所述第三晶体管T3的源极和漏极导通时,没有信号给到所述读取线READ。此时,所述读取线READ与附近的其他线路,例如所述显示电路30上的线路的信号或第一电源线VDD上的噪声或所述扫描线Scan之间耦合产生电信号,此时的电信号也即噪声信号,电信号通过所述读取线READ流向所述读取模块40。所述读取模块40得到的电信号即为所述空白信号,所述读取模块40用于把所述空白信号由电信号转换成数字信号以供所述去噪模块200采集。
进一步地,所述去噪模块200用于采集转换成数字信号后的所述传感信号和所述空白信号,且将所述传感信号减去所述空白信号以得到去噪信号,并将所述去噪信号传递给所述主板300。所述主板300用于把所述去噪信号转换成对应的触控信号或指纹识别信号并进行后续的处理,例如将触控信号所指示的位置与所述显示面板100的视频信号融合在显示面板100上显示。其中,所述去噪模块200包括现场可编程门阵列(Field-Programmable
Gate Array,FPGA),也即万能IC。所述去噪模块200可单独设置,也可集成在所述显示装置1000的时序控制(Timing Control,Tcon)板400上。所述主板300也即所述显示装置1000的SOC主板(System on Chip,片上***)。SOC主板可通过I2C接口或SPI接口与所述时序控制板400连接。
具体地,继续参照图1和图4,所述光感传感电路10的工作原理为:第一电源线VDD和第二电源线VGG为恒压电压源,数据列DA的传感单元60中的第一晶体管T1一直处于打开状态,并给第一电容C1充电。开关晶体管第二晶体管T2为寻址开关,扫描线Scan控制第二晶体管T2逐行打开,以检测第一电容C1。当有光照射到所述第一晶体管T1时,所述第一晶体管T1的漏电流增大,使第一电容C1的电容发生变化。第二晶体管T2检测第一电容C1的变化,此时读取线READ从所述第二晶体管T2读取到的传感信号即为所述第一晶体管T1因光照而产生的感测信号,而空白列FA的空白单元70因未设置所述光感传感器,不受光照射的影响,读取线READ从第三晶体管T3读取到的空白信号不变。读取模块40读取所述传感信号和所述空白信号,并把所述传感信号和所述空白信号转换成数字信号以供所述去噪模块200采集。所述去噪模块200用于采集转换成数字信号后的所述传感信号和所述空白信号,并将所述传感信号减去所述空白信号以得到去噪信号。
其他数据列DA上的所述第一晶体管T1因没有受到光的照射,对应的传感单元60中的第一晶体管T1的漏电流不变,读取线READ从对应的第二晶体管T2读取到的传感信号与从有光照射的数据列DA的第二晶体管T2读取到的传感信号的大小不同,以此确定显示装置的感光位置。
在本实施例的显示装置1000中,通过把显示面板100上集成的光感传感电路10设置成空白列FA和数据列DA,并通过读取模块40读取空白列FA和数据列DA的信号。去噪模块200用于将数据列DA的传感信号减去空白列FA的空白信号以得到去噪信号,并把去噪信号传递给主板300。以此消除了集成有光感传感器的显示面板100出现的噪声,提高了光感传感器感测结果的准确性。
在一种实施例中,与上述实施例不同的是,所述空白单元70’还包括第四晶体管T4和第二存储电容C2,具体的请参照图5,图5为本申请提供的光感传感电路的第二种电路连接示意图。所述第四晶体管T4的栅极与所述第二电源线VGG连接,所述第四晶体管T4的源极与所述第一电源线VDD连接,所述第四晶体管T4的漏极与所述第二存储电容C2的一端连接,所述第二存储电容C2的另一端与所述第二电源线VGG连接,所述第三晶体管T3的栅极与所述扫描线Scan连接,所述第三晶体管T3的漏极与所述读取模块40连接。
具体地,所述读取模块40通过读取线READ读取所述空白单元70’的空白信号。具体的,所述空白单元70’内的所述第三晶体管T3的栅极与所述扫描线Scan连接,所述第三晶体管T3的漏极与所述读取线READ连接,所述第三晶体管T3的源极未与所述第二存储电容C2连接。当所述扫描线Scan给所述第三晶体管T3的栅极提供电压使所述第三晶体管T3的源极和漏极导通时,没有信号给到所述读取线READ。此时,所述读取线READ与附近其他线路的信号耦合产生电信号,电信号通过所述读取线READ流向所述读取模块40。
可以理解的是,本实施例中的空白列也设置有光感传感器,即第四晶体管T4,但和数据列不同的是,空白列的第四晶体管T4(光感传感器)未接入开关晶体管(即第三晶体管T3),故不管空白列的空白单元70’是否接收到光,读取模块从空白单元70’读取到的空白信号均为背景噪声。其他说明请参照上述实施例,在此不再赘述。
在一种实施例中,请参照图6,图6为本申请实施例提供的显示面板的第二种剖面示意图。与上述实施例不同的是,所述显示面板101的所述显示电路30和所述光感传感电路10同层设置。具体地,所述显示面板101包括基板20、显示电路30以及所述光感传感电路10。所述显示电路30设置于所述基板20上,所述光感传感电路10也设置在所述基板20上,且所述显示电路30和所述光感传感电路10同层设置。如此所述光感传感电路10的信号线(如第一电源线VDD、第二电源线VGG以及扫描线Scan)可以与所述显示电路30中对应的信号线复用。其他说明请参照上述实施例,在此不再赘述。
本申请实施例还提供一种用于上述实施例其中之一的显示装置的去噪方法。请结合参照图1和图7,图7为本申请实施例提供的显示装置的去噪方法的流程示意图,所述去噪方法包括以下步骤:
步骤S10:所述读取模块读取所述数据列的所述传感信号和所述空白列的所述空白信号,并把所述传感信号和所述空白信号转换成数字信号;
具体地,请参照图4,所述读取模块40通过读取线READ与所述第二晶体管T2的漏极连接,以读取所述传感单元60的传感信号。具体地,所述第二电源线VGG给所述第一晶体管T1的栅极提供电压使所述第一晶体管T1的所述源极和所述漏极导通,所述第一晶体管T1的沟道因被光照射而产生光生漏电流,并依光强的程度产生不同程度的漏电流。所述第一电源线VDD的电信号从所述第一晶体管T1的源极流向漏极,并到达所述第一存储电容C1的一端,并因所述第一晶体管T1的沟道的光生漏电流而产生变化。所述第一存储电容C1的另一端连接所述第二电源线VGG,则此时所述第一存储电容C1处于充电状态,其充电的电压包含光感的信息。同时所述第一存储电容C1与所述第一晶体管T1的漏极连接的一端还连接所述第二晶体管T2的源极,当所述扫描线Scan给所述第二晶体管T2的栅极提供电压使所述第二晶体管T2的源极和漏极导通时,则所述第一存储电容C1存储的电压通过所述第二晶体管T2的源极流向漏极,使得所述第一存储电容C1通过所述第二晶体管T2放电,并经过所述读取线READ流向所述读取模块40。
进一步地,所述读取模块40通过另一读取线READ读取所述空白单元70的空白信号。具体地,所述空白单元70内的所述第三晶体管T3的栅极与所述扫描线Scan连接,所述第三晶体管T3的漏极与所述读取线READ连接,所述第三晶体管T3的源极处于断开状态。当所述扫描线Scan给所述第三晶体管T3的栅极提供电压使所述第三晶体管T3的源极和漏极导通时,没有信号给到所述读取线READ。此时,所述读取线READ与附近其他线路的信号耦合产生电信号,电信号通过所述读取线READ流向所述读取模块40。
步骤S20:所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号,并输出去噪信号给所述主板;
具体的,参照图1,所述去噪模块200采集转换成所述数字信号后的所述传感信号和所述空白信号;所述去噪模块200将所述传感信号减去所述空白信号得到所述去噪信号;所述去噪模块200通过通讯协议把所述去噪信号传递给所述主板300。
进一步的,所述去噪模块200包括现场可编程门阵列,也即万能IC。所述去噪模块200可单独设置,也可集成在所述显示装置1000的时序控制板400上。
步骤S30:所述主板接收所述去噪信号,并转换成对应的触控信号或指纹识别信号。
具体的,继续参照图1,所述主板300把所述去噪信号转换成对应的触控信号或指纹识别信号并进行后续的处理,例如将触控信号所指示的位置与所述显示面板100的视频信号融合在显示面板100上显示。
根据上述实施例可知:
本申请提供一种显示装置及其去噪方法,所述显示装置包括显示面板、去噪模块以及主板。所述显示面板包括光感阵列和读取模块,且划分为显示区和非显示区。所述光感阵列包括空白列和数据列,所述空白列位于所述显示区两侧的至少一个所述非显示区内,所述数据列位于所述显示区内。所述读取模块设置于所述非显示区。所述读取模块用于读取所述数据列的传感信号和所述空白列的空白信号。所述去噪模块用于将所述数据列的传感信号减去所述空白列的空白信号以得到去噪信号,并把所述去噪信号传递给所述主板。以消除集成有光感传感器的显示面板出现的噪声。
综上所述,虽然本申请已以优选实施例揭露如上,但上述优选实施例并非用以限制本申请,本领域的普通技术人员,在不脱离本申请的精神和范围内,均可作各种更动与润饰,因此本申请的保护范围以权利要求界定的范围为准。
Claims (20)
- 一种显示装置,其包括显示面板和去噪模块,所述去噪模块和所述显示面板连接,所述显示面板划分为显示区和非显示区,所述显示面板包括:基板;显示电路,设置于所述基板上;以及光感传感电路,设置于所述基板上,其中,所述光感传感电路包括:数据列,所述数据列位于所述显示区内,所述数据列包括至少一个传感单元;以及空白列,所述空白列位于所述显示区两侧的至少一个所述非显示区内,所述空白列包括至少一个空白单元;其中,所述传感单元用于提供传感信号,所述空白单元用于提供空白信号,所述去噪模块用于采集所述传感信号和所述空白信号,并将所述传感信号减去所述空白信号以得到去噪信号。
- 根据权利要求1所述的显示装置,其中,所述光感传感电路还包括读取模块,所述读取模块设置于所述非显示区,所述读取模块与所述去噪模块连接,且所述读取模块还与所述传感单元和所述空白单元连接,用于读取所述传感信号和所述空白信号,并把所述传感信号和所述空白信号转换成数字信号以供所述去噪模块采集。
- 根据权利要求2所述的显示装置,其中,所述读取模块通过读取线与所述传感单元和所述空白单元连接。
- 根据权利要求2所述的显示装置,其中,所述读取模块为绑定在所述光感传感电路一侧的COF。
- 根据权利要求2所述的显示装置,其中,所述传感单元包括第一晶体管、第一存储电容以及第二晶体管,所述第一存储电容连接于所述第一晶体管的栅极与漏极之间,所述第二晶体管连接于所述第一晶体管与所述读取模块之间;所述空白单元包括第三晶体管,所述第三晶体管与所述读取模块连接。
- 根据权利要求5所述的显示装置,其中,所述光感传感电路还包括第一电源线、第二电源线以及扫描线,其中所述空白列和所述数据列均与所述第一电源线平行,所述扫描线与所述第二电源线平行,且所述扫描线与所述第一电源线垂直。
- 根据权利要求6所述的显示装置,其中,所述第一晶体管的所述栅极与所述第二电源线连接,所述第一晶体管的源极与所述第一电源线连接,所述第一晶体管的所述漏极与所述第一存储电容的一端连接,所述第一存储电容的另一端与所述第二电源线连接,且所述第一晶体管的所述漏极还与所述第二晶体管的源极连接,所述第二晶体管的栅极与所述扫描线连接,所述第二晶体管的漏极与所述读取模块连接。
- 根据权利要求5所述的显示装置,其中,所述空白单元还包括第四晶体管和第二存储电容,所述第四晶体管与所述第二存储电容连接,所述第二存储电容与所述第三晶体管不连接。
- 根据权利要求1所述的显示装置,其中,所述显示面板为液晶显示面板或OLED显示面板。
- 根据权利要求1所述的显示装置,其中,所述显示电路和所述光感传感电路不同层设置。
- 根据权利要求10所述的显示装置,其中,所述显示面板还包括多个像素,每相邻的两个所述像素之间具有间隔,所述光感传感电路设置于所述间隔的相对上方。
- 根据权利要求1所述的显示装置,其中,所述显示电路和所述光感传感电路同层设置。
- 根据权利要求1所述的显示装置,其中,所述显示装置还包括时序控制板,所述去噪模块集成在所述时序控制板上。
- 根据权利要求13所述的显示装置,其中,所述去噪模块包括现场可编程门阵列。
- 一种用于如权利要求1所述的显示装置的去噪方法,其中,所述显示装置还包括主板,所述去噪方法包括以下步骤:所述读取模块读取所述数据列的所述传感信号和所述空白列的所述空白信号,并把所述传感信号和所述空白信号转换成数字信号;所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号,并输出去噪信号给所述主板;以及所述主板接收所述去噪信号,并转换成对应的触控信号或指纹识别信号。
- 根据权利要求15所述的显示装置的去噪方法,其中,所述读取模块通过读取线读取所述数据列的所述传感信号和所述空白列的所述空白信号。
- 根据权利要求16所述的显示装置的去噪方法,其中,所述读取模块为绑定在所述光感传感电路一侧的COF。
- 根据权利要求15所述的显示装置的去噪方法,其中,所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号,并输出去噪信号给所述主板的步骤,包括:所述去噪模块采集转换成所述数字信号后的所述传感信号和所述空白信号;所述去噪模块将所述传感信号减去所述空白信号得到所述去噪信号;以及所述去噪模块通过通讯协议把所述去噪信号传递给所述主板。
- 根据权利要求18所述的显示装置的去噪方法,其中,所述显示装置还包括时序控制板,所述去噪模块集成在所述时序控制板上。
- 根据权利要求19所述的显示装置的去噪方法,其中,所述去噪模块包括现场可编程门阵列。
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