WO2021027361A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2021027361A1
WO2021027361A1 PCT/CN2020/092764 CN2020092764W WO2021027361A1 WO 2021027361 A1 WO2021027361 A1 WO 2021027361A1 CN 2020092764 W CN2020092764 W CN 2020092764W WO 2021027361 A1 WO2021027361 A1 WO 2021027361A1
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WIPO (PCT)
Prior art keywords
light
display
optical sensor
gray scale
display device
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Application number
PCT/CN2020/092764
Other languages
English (en)
French (fr)
Inventor
钱先锐
Original Assignee
成都辰显光电有限公司
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Publication date
Application filed by 成都辰显光电有限公司 filed Critical 成都辰显光电有限公司
Priority to KR1020227003629A priority Critical patent/KR20220027231A/ko
Publication of WO2021027361A1 publication Critical patent/WO2021027361A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • 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
    • G09G3/2007—Display of intermediate tones
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0428—Gradation resolution change
    • 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
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the embodiments of the present application relate to the field of display technology, such as a display device and a driving method thereof.
  • the present application provides a display device and a driving method thereof, so as to realize normal display when the gray scale is switched when the display device is driven by a digital and analog hybrid driving mode, and improve the display effect.
  • an embodiment of the present application provides a display device, including a display panel and a driving chip electrically connected to the display panel;
  • the display panel includes a display area and a non-display area.
  • the non-display area includes a detection area.
  • the display area and the detection area are provided with light-emitting units arranged in an array.
  • the light-emitting side of the light-emitting unit in the detection area is provided with optical sensors and optical sensors. Electrically connected with the driving chip;
  • the optical sensor is set to detect the luminous brightness of the light-emitting unit in the detection area under the preset gray scale and output the brightness signal to the driving chip.
  • the driving chip is set to determine the preset gray scale corresponding to the brightness signal output by the optical sensor and the preset gray scale The display drive signal.
  • the embodiments of the present application also provide a method for driving a display device.
  • the display device includes a display panel and a driving chip electrically connected to the display panel; wherein the display panel includes a display area and a detection area, and the display area and the detection area
  • the light-emitting units arranged in an array are arranged inside, an optical sensor is arranged on the light-emitting side of the light-emitting unit in the detection area, and the optical sensor is electrically connected with the driving chip;
  • the driving method of the display device includes:
  • the optical sensor detects the light-emitting brightness of the light-emitting unit in the detection area under a preset gray scale and outputs the brightness signal to the driving chip;
  • the driving chip determines the display driving signal corresponding to the preset gray scale according to the brightness signal output by the optical sensor and the preset gray scale.
  • the embodiment of the present invention provides a display device and a driving method thereof, which includes a display panel and a driving chip electrically connected to the display panel; wherein, the non-display area of the display panel includes a detection area, and an array array is arranged in the display area and the detection area.
  • the light-emitting unit of the cloth, the optical sensor in the detection area is electrically connected to the driving chip; the light-emitting brightness of the light-emitting unit in the detection area under the preset gray scale is detected by the optical sensor and the brightness signal is output to the driving chip, which is output according to the optical sensor
  • the brightness signal and the preset gray scale determine the display drive signal corresponding to the preset gray scale, and then the luminous brightness of the light-emitting unit can be detected to compensate the display in time when the luminous brightness of the light-emitting unit does not match the corresponding gray scale
  • the driving signal enables the display driving signal to accurately correspond to the display gray scale, thereby allowing the light-emitting unit to display the gray scale normally, avoiding the gray scale confusion and abnormal display when the display device is driven by the digital and analog hybrid driving method to switch the gray scale. Improve the display effect.
  • FIG. 1 is a top view of a display device provided by an embodiment of the present application.
  • FIG. 2 is a first cross-sectional view of a display device provided by an embodiment of the present application.
  • FIG. 3 is a second cross-sectional view of a display device according to an embodiment of the present application.
  • FIG. 4 is a top view of another display device provided by an embodiment of the present application, wherein the number of light-emitting units per row in the detection area is less than the number of light-emitting units per row in the display area;
  • FIG. 5 is a flowchart of a driving method of a display device according to an embodiment of the present application.
  • FIG. 6 is a flowchart of another method for driving a display device according to an embodiment of the present application, in which the display driving signal includes an analog data voltage and a digital data voltage; a frame of image is divided into multiple sub-frames, and light is emitted in the multiple sub-frames The lighting duration of the unit is different;
  • FIG. 7 is a timing diagram of data voltages in a frame provided by an embodiment of the present application.
  • FIG. 8 is a flowchart of another method for driving a display device according to an embodiment of the present application, wherein the display driving signal includes an analog data voltage and a digital data voltage; a frame is divided into an analog light-emitting period and a digital light-emitting period. The time period is divided into multiple sub-frames, and the light-emitting duration of the light-emitting unit in the multiple sub-frames is different;
  • FIG. 9 is another timing diagram of data voltages in one frame provided by an embodiment of the present application.
  • FIG. 10 is a top view of the structure of another display device provided by an embodiment of the present application, in which the driving chip includes a compensation module 510 and a driving center module 520.
  • the driving method of using digital and analog hybrid driving display device is more and more common.
  • the driving method of digital and analog hybrid driving is used to drive the display device, there is a difference between the driving method of digital and analog driving, and when the gray scale is switched It is easy to cause grayscale confusion and cause abnormal display pictures.
  • an analog drive mode usually by adjusting the size of the data voltage output by the drive chip to control the luminous brightness of the light-emitting unit in the display device to control the display gray scale; when using the digital drive mode, usually by controlling the light emission in one frame The light-emitting duration of the unit controls the display gray scale.
  • analog driving mode when the data voltage is doubled, the corresponding gray scale may be doubled; but in digital driving, when the light-emitting time in one frame is doubled, the corresponding gray scale may increase more than doubled Or less than one time, that is, the correspondence between the data voltage change and the gray-scale change in the analog driving mode and the corresponding relationship between the light-emitting time change and the gray-scale change in the digital driving mode may be inconsistent. Therefore, when switching the gray scale, The adjustment amount for the analog data voltage and the adjustment amount for the digital data voltage are prone to inaccuracy, which causes the gray scale confusion when the gray scale is switched, and causes the display screen to be abnormal.
  • FIG. 1 is a top view of a display device provided by an embodiment of the present application.
  • the display device includes a display panel 100 and a driving chip 200 electrically connected to the display panel 100. ;
  • the display panel 100 includes a display area 110 and a non-display area 120.
  • the non-display area 120 includes a detection area 121.
  • the display area 110 and the detection area 121 are provided with arrayed light-emitting units.
  • the light-emitting units in the detection area 121 emit light.
  • An optical sensor 1211 is provided on the side, and the optical sensor 1211 is electrically connected to the driving chip 200;
  • the optical sensor 1211 is configured to detect the luminous brightness of the light-emitting unit in the detection area 121 at a preset gray scale and output a brightness signal to the driving chip 200.
  • the driving chip 200 is configured to determine the preset according to the brightness signal output by the optical sensor 1211 and the preset gray scale. Set the display drive signal corresponding to the gray scale.
  • the display panel 100 includes light-emitting units arranged in an array and a pixel circuit (not shown in the figure) that drives the light-emitting units to emit light.
  • the driving chip 200 can drive the light-emitting units to emit light by providing display driving signals to the pixel circuits.
  • the light emitting unit may include at least a red light emitting unit 111, a green light emitting unit 112, and a blue light emitting unit 113.
  • the display panel 100 may further include a plurality of data lines and a plurality of scan lines, and the driving chip 200 may provide display driving signals to the pixel circuits through the data lines, and the display driving signals may include digital driving signals and analog driving signals.
  • a light-emitting unit is also provided in the detection area 121.
  • the detection area 121 includes a pixel circuit corresponding to driving the light-emitting unit, and the pixel circuit and the signal line ( The connection mode (including the data line and the scan line) is the same as the connection mode of the pixel circuit and the signal line in the display area 110.
  • an optical sensor 1211 is provided on the light-emitting side of the light-emitting unit in the detection area 121, and the optical sensor 1211 is configured to detect the light-emitting brightness of the light-emitting unit.
  • the optical sensor 1211 may be a grayscale detection sensor. Referring to FIG. 1, in an embodiment, the optical sensor 1211 may correspond to the light-emitting unit in the detection area 121 one-to-one.
  • the optical sensor 1211 can detect the light-emitting brightness of the light-emitting unit in the detection area 121 under a preset gray scale, and the driving chip 200 can pre-store the brightness of the light-emitting unit under the preset gray scale.
  • the brightness that should be under the gray scale is referred to as the target brightness signal under the gray scale.
  • the preset gray levels can include multiple, the light-emitting unit in the detection area 121 can display the same gray level each time, the optical sensor 1211 detects the light-emitting brightness of the light-emitting unit in the detection area 121 multiple times, and outputs the detected brightness The signal is sent to the driving chip 200.
  • the driving chip 200 can compensate and adjust the display driving signal according to whether the brightness signal output by the optical sensor 1211 matches the preset gray level. For example, the driving chip 200 can adjust the display driving signal according to the current gray level detected by the optical sensor 1211. Whether the brightness signal under the gray scale matches the target brightness signal stored in the driver chip 200 under the current gray scale to compensate the display driving signal output by the driver chip 200, and then determine the final display drive corresponding to each gray scale in the preset gray scale signal. Therefore, the display device of this embodiment can use the brightness sensor to detect the brightness of the light-emitting unit in the detection area 121 under the preset gray scale.
  • the driving chip 200 When the output display drive signal does not correspond to the gray scale to be displayed, the display drive signal is compensated in time to realize self-feedback compensation to ensure that the display drive signal corresponding to each gray scale can accurately correspond to the gray scale, avoiding related technologies
  • the grayscale switching is prone to confusion and abnormal display.
  • the preset gray levels may be part of all gray levels, or may be all gray levels. Wherein, when the preset gray levels are part of all gray levels, some of the gray levels may be gray levels that are prone to display abnormalities when the gray levels are switched.
  • the preset gray levels are partial gray levels, which can reduce the number of inspections and reduce power consumption on the basis of ensuring a good display effect; when the preset gray levels are all gray levels, the display of each gray level can be guaranteed
  • the driving signals are all detected, so that the display driving signal corresponding to each gray scale can be adjusted accurately, ensuring a better display effect.
  • the display device provided by the embodiment of the present application includes a display panel and a driving chip electrically connected to the display panel; wherein the non-display area of the display panel includes a detection area, and the display area and the detection area are provided with arrayed light emitting units, The optical sensor in the area is electrically connected to the driving chip; the light-emitting brightness of the light-emitting unit in the detection area is detected by the optical sensor and the brightness signal is output to the driving chip.
  • the driving chip is based on the brightness signal output by the optical sensor and the preset
  • the gray scale determines the display drive signal corresponding to the preset gray scale, and then, through the detection of the luminous brightness of the light-emitting unit, when the luminous brightness of the light-emitting unit does not match the corresponding gray scale, the display drive signal can be compensated in time to make the display drive
  • the signal accurately corresponds to the display gray level, so that the light-emitting unit can display the gray level normally, avoiding the gray level confusion when the display device is driven by the digital and analog hybrid driving method to switch the gray level, displaying abnormal conditions, and improving the display effect.
  • FIG. 2 is a cross-sectional view 1 of a display device provided by an embodiment of the present application.
  • the cross-sectional view can be obtained by cutting along the section line AA' of the top view shown in FIG. 1
  • FIG. 3 is a display provided by an embodiment of the present application.
  • the second cross-sectional view of the device, the cross-sectional view can be obtained by cutting along the section line B-B' from the top view shown in FIG. 1.
  • the arrangement of the light-emitting units in the detection area 121 is the same as The arrangement of the light emitting units in the display area 110 is the same, so that the light emitting units in the detection area 121 can be prepared together with the light emitting units in the display area 110, and the same mask as the display area 110 can be used during preparation. Furthermore, there is no need to separately prepare the mask plate, and the preparation cost is reduced.
  • the arrangement of the light-emitting units in the detection area 121 is the same as the arrangement of the light-emitting units in the display area 110, so that the topological structure of the lines connected to the light-emitting units in the detection area 121 and the line connected to the light-emitting units in the display area 110 are the same. Therefore, when the topological structure of the circuit connecting the light-emitting unit in the detection area 121 is formed, no additional design is needed, the circuit design time will not be increased, and the design and manufacturing cycle of the display device will be shortened. 2 and 3, the light emitting unit in the detection area 121 and the light emitting unit in the display area 110 are arranged on the same side of the substrate 130.
  • a light shielding layer 140 is provided on the side of the optical sensor 1211 away from the light emitting unit.
  • the detection area 121 is located in the non-display area 120 of the display panel 100, the light-emitting unit in the detection area 121 does not participate in the display.
  • the optical sensor 1211 is provided with a light shielding layer 140 on the side away from the light-emitting unit. Therefore, the influence of light leakage on the display effect caused by the light leakage of the light emitting unit in the detection area 121 after the light is emitted can be avoided, so that the display effect is better.
  • the light shielding layer 140 on the side of the optical sensor 1211 away from the light-emitting unit in the detection area 121, it is possible to prevent external light from entering the display panel 100 and affecting the detection result of the optical sensor 1211, thereby ensuring that the optical sensor 1211 detects Only the light emitted by the light-emitting unit can ensure the accuracy of the detection result of the optical sensor 1211, so that the driving chip 200 can determine an accurate display driving signal according to the brightness signal output by the optical sensor 1211, and ensure that the display device can correctly display gray Order to achieve a good display effect.
  • the number of light-emitting units per row in the detection area 121 is less than the number of light-emitting units per row in the display area 110 .
  • the direction of the row of light-emitting units is the first direction x
  • the first direction x may be the extension direction of the scan line in the display device.
  • the arrangement of the light-emitting units in the detection area 121 may also be different from that of the display area 110, which will not affect the display effect.
  • each row of light-emitting units in the detection area 121 includes three adjacent red light-emitting units 111, three adjacent green light-emitting units 112, and three adjacent blue light-emitting units 113, and three phases
  • a sacrificial unit 114 is provided between the adjacent red light emitting unit 111 and the three adjacent green light emitting units 112, and the sacrificial unit 114 is provided between the three adjacent green light emitting units 112 and the three adjacent blue light emitting units 113.
  • the sacrificial unit 114 is illustrated schematically as an example, where the sacrificial unit 114 may occupy the same area as the light-emitting unit, but it does not include a light-emitting material and cannot emit light, that is, the number of light-emitting units in each row of light-emitting units in the detection area 121 is small Based on the number of light-emitting units in each row of light-emitting units in the display area 110, the optical sensor 1211 can detect the brightness of the light-emitting units, thereby saving more materials for making the light-emitting units and relatively saving costs. Referring to FIG.
  • an optical sensor 1211 is provided on the light-emitting side of three adjacent light-emitting units of the same color, which further facilitates the installation of the optical sensor 1211.
  • the area of the optical sensor 1211 is large, the light-emitting unit can still be matched. The luminous brightness is detected.
  • the present application also provides a method for driving a display device, which can be used to drive the display device provided by any embodiment of the present application.
  • the display device includes a display panel 100 and a display device electrically connected to the display panel 100.
  • Driver chip 200 the display panel 100 includes a display area 110 and a detection area 121.
  • the display area 110 and the detection area 121 are provided with arrayed light emitting units, and an optical sensor 1211 is provided on the light emitting side of the light emitting unit in the detection area 121 ,
  • the optical sensor 1211 is electrically connected to the driving chip 200.
  • FIG. 5 is a flowchart of a method for driving a display device according to an embodiment of the present application.
  • the method for driving the display device includes step 210 to step 220.
  • the optical sensor detects the light-emitting brightness of the light-emitting unit in the detection area under a preset gray scale and outputs the brightness signal to the driving chip.
  • step 220 the driving chip determines the display driving signal corresponding to the preset gray scale according to the brightness signal output by the optical sensor and the preset gray scale.
  • the light-emitting brightness of the light-emitting unit in the detection area under the preset gray scale is detected by the optical sensor and the brightness signal is output to the driving chip.
  • the driving chip is based on the brightness signal and preset output of the optical sensor.
  • the display driving signal can be compensated in time to make the display
  • the driving signal accurately corresponds to the display gray level, so that the light-emitting unit can display the gray level normally, avoiding the gray level confusion when the display device is driven by the digital and analog hybrid driving method to switch the gray level, displaying abnormal conditions, and improving the display effect.
  • FIG. 6 is a flowchart of another method for driving a display device according to an embodiment of the present application.
  • FIG. 7 is a timing diagram of data voltages in one frame provided by an embodiment of the present application.
  • the display driving signal includes an analog data voltage and a digital data voltage; a frame of image is divided into multiple sub-frames, and the light-emitting duration of the light-emitting units in the multiple sub-frames is different; the driving method of the display device includes steps 310 to 320.
  • the optical sensor detects the light-emitting brightness of the light-emitting unit in the detection area at a preset gray scale and outputs a brightness signal to the driving chip.
  • step 320 the driver chip determines whether the brightness signal output by the optical sensor matches the preset gray scale, and when the brightness signal output by the optical sensor does not match the preset gray scale, compensate the digital data voltage and the analog data voltage. At least one of.
  • the driving method of the display device is suitable for a driving method of digital and analog hybrid driving of the display device. Therefore, the display driving signal includes an analog data voltage and a digital data voltage.
  • the analog data voltage may include multiple voltage values
  • the digital data voltage includes two voltage values
  • the digital data voltage includes 0 and 1 for illustration. Referring to FIG. 7, a frame is divided into 4 sub-frames as an example.
  • Each sub-frame includes a data writing stage t1 and a light-emitting stage t2, where the light-emitting duration ratio of the light-emitting units in the 4 sub-frames is, for example, 1:2:4 :8, that is, the ratio of the duration of the light-emitting phase t2 in the four sub-frames is 1:2:4:8, and the digital data voltage determines which sub-frame of the light-emitting unit emits light in one frame, for example, the digital data voltage corresponding to the sub-frame is 0 In the case of corresponding to the light-emitting unit does not emit light in the sub-frame; when the digital data voltage corresponding to the sub-frame is 1, the light-emitting unit corresponding to the sub-frame emits light.
  • the magnitude of the analog data voltage can be written to the pixel circuit corresponding to the light-emitting unit during the data writing phase t1 of the sub-frame to control the light-emitting unit in the sub-frame.
  • the light-emitting brightness is further controlled by the digital data voltage to control the light-emitting sub-frame of the light-emitting unit to control the light-emitting duration of the light-emitting unit, and the analog data voltage is used to control the light-emitting brightness of the light-emitting unit in the light-emitting sub-frame to jointly control the display gray scale.
  • the non-light-emitting sub-frame can be selected by writing the digital data voltage 0 in the data writing stage t1 of the sub-frame, and then the light-emitting sub-frame can also be determined, and the light-emitting sub-frame can be determined by In the data writing stage t1, analog data voltages of different sizes are written to control the light-emitting brightness of the light-emitting unit in the light-emitting sub-frame.
  • the data voltage written in the data writing stage t1 is the digital data voltage 0.
  • analog data voltages are written respectively, and the magnitudes of these analog data voltages may be different, so that the light emitting unit does not emit light in the first subframe T1, and in the second subframe T2, the third subframe T3, and the fourth subframe T4 emits light, and the light-emitting brightness is different according to the magnitude of different analog data voltages.
  • the driving chip determines that the brightness signal output by the optical sensor does not match the preset gray scale
  • the light emission of the light-emitting unit in one frame can be adjusted by compensating the digital data voltage.
  • the light-emitting brightness of the unit matches the preset gray scale, so as to ensure the normal display of the gray scale during display.
  • FIG. 7 only schematically shows the data voltage corresponding to each sub-frame light emitting stage t2, and the data voltage of the data writing stage t1 is not shown.
  • compensating for at least one of the digital data voltage and the analog data voltage includes:
  • the optical sensor When the brightness signal output by the optical sensor is less than the corresponding target brightness signal under the preset gray scale, perform at least one of the following: increase the analog data voltage, and change the digital data voltage corresponding to the sub-frame to extend the light-emitting unit within one frame At least one of the lighting duration;
  • the optical sensor When the brightness signal output by the optical sensor is greater than the corresponding target brightness signal under the preset gray scale, perform at least one of the following: reduce the analog data voltage and change the digital data voltage corresponding to the sub-frame to shorten the light-emitting unit within one frame At least one of the luminous duration.
  • the brightness signal output by the optical sensor when the brightness signal output by the optical sensor is less than the target brightness signal corresponding to the preset gray scale, it means that the gray scale corresponding to the luminous brightness of the light emitting unit in the detection area does not reach the preset gray scale at this time.
  • At least one way of increasing the light-emitting brightness of the light-emitting unit by increasing the analog data voltage, and extending the light-emitting time of the light-emitting unit in one frame by changing the digital data voltage corresponding to the sub-frame for example, as shown in FIG. 7
  • the frame includes four sub-frames as an example.
  • the display drive signal corresponds to the preset gray scale to ensure a good display effect.
  • the simulation can be reduced by At least one way of reducing the light-emitting brightness of the light-emitting unit by means of data voltage, and shortening the light-emitting duration of the light-emitting unit in one frame by changing the digital data voltage corresponding to the sub-frame (for example, as shown in FIG.
  • the original one can emit light in the fourth sub-frame T4 with a weight of 8, and change to the first sub-frame T1 and the second sub-frame T2.
  • FIG. 8 is a flowchart of another driving method of a display device according to an embodiment of the present application.
  • FIG. 9 is a timing diagram of another data voltage in a frame provided by an embodiment of the present application.
  • the display driving signal includes analog data voltage and digital data voltage; a frame is divided into an analog light-emitting period and a digital light-emitting period, the digital light-emitting period is divided into multiple sub-frames, and the light-emitting duration of the light-emitting unit in the multiple sub-frames different.
  • the driving method of the display device includes step 410 to step 420.
  • the optical sensor detects the light-emitting brightness of the light-emitting unit in the detection area under a preset gray scale and outputs a brightness signal to the driving chip.
  • step 420 the driver chip determines whether the brightness signal output by the optical sensor matches the preset gray scale, and when the brightness signal output by the optical sensor does not match the preset gray scale, compensates the analog data voltage during the analog light emitting period And at least one of the digital data voltage in the digital light-emitting period.
  • the timing chart shown in Figure 9 includes an analog light-emitting period and a digital light-emitting period.
  • the display driving signal includes an analog data voltage
  • the analog light-emitting period can be adjusted by adjusting the magnitude of the analog data voltage.
  • the number of sub-frames in the digital light-emitting period shown in FIG. 9 can be relatively small. It shows that the digital lighting period is divided into three sub-frames. That is, the first subframe T1, the second subframe T2, and the third subframe T3.
  • the display device driving method provided in this embodiment can adjust the luminous brightness of the light-emitting unit in the simulated light-emitting period by compensating the analog data voltage in the simulated light-emitting period when the brightness signal output by the optical sensor and the preset gray scale are not matched , And adjust the gray scale by compensating the digital data voltage in the digital light-emitting period to adjust the light-emitting duration of the light-emitting unit in the digital light-emitting period, so that the display driving signal output by the driving chip can make the detection area
  • the light-emitting brightness of the light-emitting unit matches the preset gray scale, so as to ensure the normal display of the gray scale during display.
  • FIG. 9 only schematically shows the corresponding data voltage in the light-emitting phase t2 in each sub-frame in the digital light-emitting period, and the data voltage in the data writing phase t1 is not shown. It should also be noted that Figure 9 only uses the analog data voltage during the simulated light-emitting period as a diagonal line for schematic output, but it is not limited to this. The simulated light-emitting period can be used for different analog data voltage levels according to the brightness of the light. Adjustment.
  • FIG. 10 is a top view of the structure of another display device according to an embodiment of the present application.
  • the driving chip includes a compensation module 510 and a driving center module 520.
  • the drive chip determines the display drive signal corresponding to the preset gray level according to the brightness signal output by the optical sensor and the preset gray level, including:
  • the compensation module 510 compensates the display driving signal output by the driving center module 520 according to the brightness signal output by the optical sensor and the target brightness signal at the preset gray scale, and feeds back the compensated display driving signal to the driving center module 520;
  • the driving center module 520 re-outputs according to the compensated display driving signal until the brightness output by the optical sensor matches the target brightness signal under the preset gray scale.
  • the compensation module 510 may be electrically connected to the optical sensor to receive the brightness signal output by the optical sensor, and the compensation module 510 may store the target brightness signal at a preset gray scale, or the drive center module 520 may store the preset brightness signal. Assuming the target brightness signal under the gray scale, the compensation module 510 can obtain the target brightness signal under the preset gray scale from the drive center module 520, and then the compensation module 510 according to the brightness signal output by the optical sensor and the target brightness signal under the preset gray scale The display driving signal that has been output by the driving center module 520 is compensated, and the compensated display driving signal is fed back to the driving center module 520.
  • the drive center module 520 can be electrically connected to the data line, and then can output the compensated display drive signal to the pixel circuit corresponding to the light-emitting unit through the data line. After the output, the optical sensor can again detect the light-emitting unit in the detection area under the preset gray scale. When the luminous brightness does not match the preset gray scale, the compensation module 510 is used to compensate again, and the drive center module 520 outputs the compensated display drive signal again, until the brightness output by the optical sensor is consistent with the preset gray level. Set the target brightness signal under the gray scale to match, and then realize the precise control of the gray scale by means of self-feedback compensation to ensure a good display effect.
  • the light-emitting brightness of the light-emitting unit in the detection area detected by the optical sensor under the preset gray scale includes:
  • the optical sensor detects the light-emitting brightness of the light-emitting unit in the detection area under the preset gray scale.
  • the gray-scale switching is prone to confusion when the display device is turned on, and with the extension of the use time of the display device, the gray-scale switching may also be confused. Therefore, by turning on the display device At time and every preset time, the optical sensor detects the luminous brightness of the light-emitting unit in the detection area under the preset gray scale, and then the drive chip determines the display corresponding to the preset gray scale according to the brightness signal output by the optical sensor and the preset gray scale The drive signal enables the display drive signal corresponding to the preset gray scale to be re-determined at the startup time and at every preset time, thereby ensuring the normal display of the grayscale at the startup time, and as the display device uses the time extension, The gray scale can be displayed normally to ensure a good display effect. Among them, the preset time can be set in the driver chip in advance.
  • the drive chip outputs the gray level to be displayed by the light-emitting unit in the display area and the final display drive signal to ensure the accuracy of the gray level displayed by the light-emitting unit in the display area, and to ensure that it is turned on
  • the precise control of the gray scale avoids the display abnormality when the gray scale is switched, and then achieves a good display effect.

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Abstract

本申请实施例公开了一种显示装置及其驱动方法，显示装置包括显示面板和与显示面板电连接的驱动芯片；显示面板包括显示区和非显示区，非显示区包括检测区，显示区和检测区内设置有阵列排布的发光单元，检测区内的发光单元的出光侧设置有光学传感器；光学传感器设置为检测检测区内发光单元在预设灰阶下的发光亮度并将亮度信号输出至驱动芯片，驱动芯片设置为根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号。

Description

显示装置及其驱动方法
本申请要求在2019年8月15日提交中国专利局、申请号为201910754772.7的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及显示技术领域，例如一种显示装置及其驱动方法。
背景技术
随着显示技术的发展，对显示装置进行数字和模拟混合驱动的驱动方式应用越来越普遍。
但是由于数字驱动和模拟驱动的驱动方式不同，在灰阶切换时候很容易造成灰阶混乱，导致显示画面异常。
发明内容
本申请提供一种显示装置及其驱动方法，以实现使用数字和模拟混合驱动方式驱动显示装置时，实现灰阶切换时的正常显示，提高显示效果。
第一方面，本申请实施例提供了一种显示装置，包括显示面板和与显示面板电连接的驱动芯片；
其中，显示面板包括显示区和非显示区，非显示区包括检测区，显示区和检测区内设置有阵列排布的发光单元，检测区内的发光单元的出光侧设置有光学传感器，光学传感器与驱动芯片电连接；
光学传感器设置为检测检测区内发光单元在预设灰阶下的发光亮度并将亮度信号输出至驱动芯片，驱动芯片设置为根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号。
第二方面，本申请实施例还提供了一种显示装置的驱动方法，显示装置包括显示面板和与显示面板电连接的驱动芯片；其中，显示面板包括显示区和检测区，显示区和检测区内设置有阵列排布的发光单元，在检测区内发光单元的出光侧设置有光学传感器，光学传感器与驱动芯片电连接；
显示装置的驱动方法包括：
光学传感器检测检测区内发光单元在预设灰阶下的发光亮度并将亮度信号 输出至驱动芯片；
驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号。
本发明实施例提供一种显示装置及其驱动方法，其中包括显示面板和与显示面板电连接的驱动芯片；其中，显示面板的非显示区包括检测区，显示区和检测区内设置有阵列排布的发光单元，检测区内的光学传感器与驱动芯片电连接；通过光学传感器检测检测区内发光单元的预设灰阶下的发光亮度并将亮度信号输出至驱动芯片，驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号，进而可以通过对发光单元发光亮度的检测，在发光单元的发光亮度与对应的灰阶不匹配的情况下，及时补偿显示驱动信号，使得显示驱动信号与显示灰阶准确对应，进而使得发光单元正常显示灰阶，避免采用数字和模拟混合驱动的方式驱动显示装置进行灰阶切换时的灰阶混乱，显示异常的情况，提高显示效果。
附图说明
图1是本申请一实施例提供的一种显示装置的俯视图；
图2是本申请一实施例提供的一种显示装置的剖视图一；
图3是本申请一实施例提供的一种显示装置的剖视图二；
图4是本申请一实施例提供的另一种显示装置的俯视图，其中，检测区内每行发光单元的数量少于显示区内每行发光单元的数量；
图5是本申请一实施例提供的一种显示装置的驱动方法的流程图；
图6是本申请一实施例提供的另一种显示装置的驱动方法的流程图，其中显示驱动信号包括模拟数据电压和数字数据电压；将一帧图像划分为多个子帧，多个子帧内发光单元的发光时长不同；
图7是本申请一实施例提供的一帧内数据电压的时序图；
图8是本申请一实施例提供的又一种显示装置的驱动方法的流程图，其中显示驱动信号包括模拟数据电压和数字数据电压；将一帧划分为模拟发光时段和数字发光时段，数字发光时段划分为多个子帧，多个子帧内发光单元的发光时长不同；
图9是本申请一实施例提供的另一种一帧内数据电压的时序图；
图10是本申请一实施例提供的又一种显示装置的结构俯视图，其中驱动芯 片包括补偿模块510和驱动中心模块520。
具体实施方式
采用数字和模拟混合驱动显示装置的驱动方式应用越来越普遍，但是采用数字和模拟混合驱动的驱动方式来驱动显示装置时，存在由于数字驱动和模拟驱动的驱动方式不同，在灰阶切换时候很容易造成灰阶混乱，造成显示画面异常的情况。采用模拟驱动的驱动方式时，通常通过调节驱动芯片输出的数据电压的大小来控制显示装置中发光单元的发光亮度来控制显示灰阶；采用数字驱动的驱动方式时，通常通过控制一帧内发光单元的发光时长来控制显示灰阶。模拟驱动方式中，数据电压增大一倍时，对应的灰阶可能增大一倍；但是数字驱动中，在一帧内发光时长增加一倍，则对应的灰阶的增大量可能大于一倍或小于一倍，即模拟驱动方式中数据电压变化量与灰阶变化的对应关系与数字驱动方式中发光时长变化量与灰阶变化的对应关系可能是不一致的，因此，进行灰阶切换时，对模拟数据电压的调节量和对数字数据电压的调节量容易出现不准确，使得灰阶切换时出现灰阶混乱，造成显示画面异常。
本申请实施例提供了一种显示装置，图1是本申请一实施例提供的一种显示装置的俯视图，参考图1，该显示装置包括显示面板100和与显示面板100电连接的驱动芯片200；
其中，显示面板100包括显示区110和非显示区120，非显示区120包括检测区121，显示区110和检测区121内设置有阵列排布的发光单元，检测区121内的发光单元的出光侧设置有光学传感器1211，光学传感器1211与驱动芯片200电连接；
光学传感器1211设置为检测检测区121内发光单元在预设灰阶的发光亮度并将亮度信号输出至驱动芯片200，驱动芯片200设置为根据光学传感器1211输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号。
参考图1，显示面板100中包括阵列排布的发光单元，以及驱动发光单元发光的像素电路(图中未示出)，驱动芯片200可以通过向像素电路提供显示驱动信号而驱动发光单元发光。其中，发光单元可以至少包括红光发光单元111、绿光发光单元112和蓝光发光单元113。显示面板100中还可以包括多条数据线和多条扫描线，驱动芯片200可通过数据线向像素电路提供显示驱动信号，该 显示驱动信号可以包括数字驱动信号和模拟驱动信号。
参考图1，本实施例提供的显示装置中，检测区121内也设置有发光单元，相应的，检测区121内包括对应驱动该发光单元的像素电路，检测区121内像素电路与信号线(包括数据线和扫描线)的连接方式与显示区110内像素电路与信号线的连接方式相同。并且检测区121内发光单元的出光侧设置光学传感器1211，该光学传感器1211设置为检测发光单元的发光亮度，例如，该光学传感器1211可以是灰阶检测传感器。参考图1，在一实施例中，光学传感器1211可以与检测区121内的发光单元一一对应。
光学传感器1211可以检测检测区121内发光单元在预设灰阶下的发光亮度，并且驱动芯片200内可以预先存储有预设灰阶下发光单元应该有的亮度，以下将发光单元在每个灰阶下应该有的亮度简称为在该灰阶下的目标亮度信号。预设灰阶可以包括多个，检测区121内发光单元可以每次显示一个相同的灰阶，光学传感器1211分多次对检测区121内发光单元的发光亮度进行检测，并输出检测到的亮度信号至驱动芯片200，驱动芯片200可以根据光学传感器1211输出的亮度信号和预设灰阶是否匹配对显示驱动信号进行补偿调整，示例性的，驱动芯片200可以根据光学传感器1211检测到的当前灰阶下亮度信号和驱动芯片200中存储的当前灰阶下的目标亮度信号是否匹配来对驱动芯片200输出的显示驱动信号进行补偿，进而确定预设灰阶中每个灰阶对应的最终显示驱动信号。因此，本实施例的显示装置，可以通过亮度传感器对检测区121内发光单元在预设灰阶下的亮度检测，在显示驱动信号不准确的情况下，例如在灰阶切换时，驱动芯片200输出的显示驱动信号与要显示的灰阶不对应时，及时对显示驱动信号进行补偿，进而实现自反馈补偿，保证每个灰阶对应的显示驱动信号都可以与灰阶准确对应，避免相关技术中的显示装置存在的采用数字和模拟混合驱动方式进行驱动时，灰阶切换容易出现混乱，显示异常的情况。
需要说明的是，预设灰阶可以是全部灰阶中的部分灰阶，也可以是全部灰阶。其中，预设灰阶为全部灰阶中的部分灰阶的情况下，部分灰阶可以是在灰阶切换容易出现显示异常的灰阶。预设灰阶为部分灰阶，可以使得检测次数较少，在保证显示效果较为良好的基础上，相对减少功耗；预设灰阶为全部灰阶时，可以保证对每个灰阶的显示驱动信号都进行检测，进而使得每个灰阶对应的显示驱动信号都可以被调整的准确无误，保证更佳的显示效果。
本申请实施例提供的显示装置，包括显示面板和与显示面板电连接的驱动芯片；其中，显示面板的非显示区包括检测区，显示区和检测区内设置有阵列排布的发光单元，检测区内的光学传感器与驱动芯片电连接；通过光学传感器检测检测区内发光单元的预设灰阶下的发光亮度并将亮度信号输出至驱动芯片，驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号，进而可以通过对发光单元发光亮度的检测，在发光单元的发光亮度与对应的灰阶不匹配的情况下，及时补偿显示驱动信号，使得显示驱动信号与显示灰阶准确对应，进而使得发光单元正常显示灰阶，避免采用数字和模拟混合驱动的方式驱动显示装置进行灰阶切换时的灰阶混乱，显示异常的情况，提高显示效果。
图2是本申请一实施例提供的一种显示装置的剖视图一，该剖视图可由图1所示俯视图沿剖面线A-A’剖切得到，图3是本申请一实施例提供的一种显示装置的剖视图二，该剖视图可由图1所示俯视图沿剖面线B-B’剖切得到，参考图1、图2和图3，在一实施例中，检测区121内发光单元排布方式与显示区110内发光单元排布方式相同，进而可以使得检测区121内的发光单元可以与显示区110内的发光单元一起制备，并且，在制备时，可以使用与显示区110相同的掩模板，进而无需再单独制备掩模板，降低制备成本。并且，检测区121内发光单元的排布方式与显示区110内发光单元排布方式相同，可以使得与检测区121内发光单元连接的线路和与显示区110内发光单元连接的线路拓扑结构相同，进而在形成检测区121内发光单元连接的线路的拓扑结构时，无需另行设计，不会增加线路设计时间，缩短显示装置的设计和制备周期。参考图2和图3，检测区121内的发光单元和显示区110内的发光单元设置于基底130的同一侧。
参考图2和图3，在一实施例中，在检测区121内，光学传感器1211远离发光单元的一侧设置有遮光层140。
示例性的，因检测区121位于显示面板100的非显示区120，故检测区121内的发光单元不参与显示，通过在检测区121内，光学传感器1211远离发光单元的一侧设置遮光层140，可以避免检测区121内发光单元发光后漏光对显示效果造成的影响，使得显示效果更佳。并且，通过在检测区121内，光学传感器1211远离发光单元的一侧设置遮光层140，可以避免外界光进入显示面板100 后，对光学传感器1211的检测结果造成影响，进而保证光学传感器1211检测到的光只有发光单元发出的光，从而保证光学传感器1211检测结果的准确性，进而使得驱动芯片200可以根据光学传感器1211输出的的亮度信号确定出准确的显示驱动信号，保证显示装置可以正确显示灰阶，进而达到良好的显示效果。
图4是本申请一实施例提供的另一种显示装置的俯视图，参考图4，在一实施例中，检测区121内每行发光单元的数量少于显示区110内每行发光单元的数量。
参考图4，发光单元所在行的方向为第一方向x，该第一方向x可以是显示装置中扫描线的延伸方向。示例性的，因检测区121内发光单元不参与显示，因此，检测区121内发光单元的排布方式也可以与显示区110不同，不会造成对显示效果的影响。图4中以检测区121内每行发光单元分别包括三个相邻的红光发光单元111、三个相邻的绿光发光单元112以及三个相邻的蓝光发光单元113，且三个相邻的红光发光单元111与三个相邻的绿光发光单元112之间设置有牺牲单元114，三个相邻的绿光发光单元112与三个相邻的蓝光发光单元113之间设置有牺牲单元114为例进行示意性说明，其中，牺牲单元114可以与发光单元占据相同的面积，但其不包括发光材料，不能进行发光，即检测区121内每行发光单元中发光单元的数量少于显示区110内每行发光单元中发光单元的数量，进而可以在实现光学传感器1211可以对检测发光单元进行亮度检测的基础上，更加节省制作发光单元的材料，相对节省成本。参考图4，三个相邻的相同颜色的发光单元的出光侧设置一个光学传感器1211，进而更加方便光学传感器1211的设置，在光学传感器1211的面积较大的情况下，依然可以实现对发光单元的发光亮度进行检测。
本申请还提供了一种显示装置的驱动方法，该显示装置的驱动方法可用于驱动本申请任意实施例提供的显示装置，参考图1，显示装置包括显示面板100和与显示面板100电连接的驱动芯片200；其中，显示面板100包括显示区110和检测区121，显示区110和检测区121内设置有阵列排布的发光单元，在检测区121内发光单元的出光侧设置有光学传感器1211，光学传感器1211与驱动芯片200电连接。
图5是本申请一实施例提供的一种显示装置的驱动方法的流程图，显示装置的驱动方法包括步骤210至步骤220。
在步骤210中，光学传感器检测检测区内发光单元在预设灰阶下的发光亮度并将亮度信号输出至驱动芯片。
在步骤220中，驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号。
本申请实施例提供的显示装置的驱动方法，通过光学传感器检测检测区内发光单元的预设灰阶下的发光亮度并将亮度信号输出至驱动芯片，驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号，进而可以通过对发光单元发光亮度的检测，在发光单元的发光亮度与对应的灰阶不匹配的情况下，及时补偿显示驱动信号，使得显示驱动信号与显示灰阶准确对应，进而使得发光单元正常显示灰阶，避免采用数字和模拟混合驱动的方式驱动显示装置进行灰阶切换时的灰阶混乱，显示异常的情况，提高显示效果。
图6是本申请一实施例提供的另一种显示装置的驱动方法的流程图，图7是本申请一实施例提供的一帧内数据电压的时序图，参考图6和图7，在一实施例中，显示驱动信号包括模拟数据电压和数字数据电压；将一帧图像划分为多个子帧，多个子帧内发光单元的发光时长不同；该显示装置的驱动方法包括步骤310至步骤320。
在步骤310中，光学传感器检测检测区内发光单元在预设灰阶下的发光亮度并将亮度信号输出至驱动芯片。
在步骤320中，驱动芯片确定光学传感器输出的亮度信号和预设灰阶是否匹配，并在光学传感器输出的亮度信号和预设灰阶不匹配的情况下，补偿数字数据电压和模拟数据电压中的至少之一。
本显示装置的驱动方法适用于对显示装置进行数字和模拟混合驱动的驱动方式，因此，显示驱动信号包括模拟数据电压和数字数据电压。示例性的，模拟数据电压可以包括多个电压值，数字数据电压包括两个电压值，以数字数据电压包括0和1进行说明。参考图7，以一帧划分为4个子帧为例进行说明，每个子帧包括数据写入阶段t1和发光阶段t2，其中，4个子帧中发光单元的发光时长比例如为1:2:4:8，即四个子帧内发光阶段t2的时长之比为1:2:4:8，数字数据电压决定发光单元在一帧内的哪个子帧发光，例如子帧对应的数字数据电压为0的情况下，对应在该子帧内发光单元不发光；子帧对应的数字数据电压为1 的情况下，对应在该子帧内发光单元发光。当确定在某一子帧内发光单元发光后，可通过在该子帧的数据写入阶段t1，向发光单元对应的像素电路写入模拟数据电压的大小来控制发光单元在该子帧内的发光亮度，进而通过数字数据电压来控制发光单元的发光子帧来控制发光单元的发光时长，通过模拟数据电压来控制发光单元在发光子帧内的发光亮度来共同控制显示灰阶。示例性的，本驱动方法中，可通过在子帧的数据写入阶段t1写入数字数据电压0来选择不发光子帧，则发光子帧也可确定，并通过在不同的发光子帧的数据写入阶段t1写入不同大小的模拟数据电压来控制发光单元在发光子帧内的发光亮度。参考图6，示例性的，在第一子帧T1，数据写入阶段t1写入的数据电压为数字数据电压0，在第二子帧T2、第三子帧T3和第四子帧T4的数据写入阶段t1分别写入模拟数据电压，这些模拟数据电压大小可能不同，使得发光单元在第一子帧T1内不发光，在第二子帧T2、第三子帧T3和第四子帧T4进行发光，且根据不同模拟数据电压的大小，发光亮度不同。
本实施例的显示装置的驱动方法中，在驱动芯片确定光学传感器输出的亮度信号和预设灰阶不匹配的情况下，可通过补偿数字数据电压的方式来调整发光单元在一帧内的发光总时长，和通过补偿模拟数据电压的方式来调整发光单元在子帧内的发光亮度来中的至少一种方式对灰阶进行调节，进而使得驱动芯片输出的显示驱动信号能够使得检测区内发光单元的发光亮度与预设灰阶相匹配，进而在显示时保证灰阶的正常显示。
需要说明的是，图7中仅示意性地示出了每个子帧发光阶段t2对应的数据电压，数据写入阶段t1的数据电压未进行示出。
在一实施例中，在光学传感器输出的亮度信号和预设灰阶不匹配不匹配的情况下，补偿数字数据电压和模拟数据电压中至少之一，包括：
在光学传感器输出的亮度信号小于预设灰阶下对应目标亮度信号的情况下，执行以下至少之一：增大模拟数据电压，改变子帧对应的数字数据电压以延长发光单元在一帧内的发光时长中的至少之一；
在光学传感器输出的亮度信号大于预设灰阶下对应目标亮度信号的情况下，执行以下至少之一：减小模拟数据电压，改变子帧对应的数字数据电压，以缩短发光单元在一帧内的发光时长中的至少之一。
示例性的，在光学传感器输出的亮度信号小于预设灰阶下对应的目标亮度信号的情况下，说明此时检测区内发光单元的发光亮度对应的灰阶没有达到预设灰阶，因此可通过增大模拟数据电压的方式提高发光单元的发光亮度，和通过改变子帧对应的数字数据电压来延长发光单元在一帧内的发光时长中的至少一种方式(例如以图7所示一帧包括四个子帧为例，可通过将原来四个子帧的数字数据电压1110改变为0001，使得原来的对应在第一子帧T1、第二子帧T2和第三子帧T3发光，加权为1+2+4＝7，改变为在第四子帧T4发光，加权为8)来增大发光单元的显示灰阶，使得发光单元的显示灰阶达到预设灰阶，并使得驱动芯片输出的显示驱动信号与预设灰阶对应，保证良好的显示效果。在光学传感器输出的亮度信号大于预设灰阶下对应的目标亮度信号的情况下，说明此时检测区内发光单元的发光亮度对应的灰阶高于预设灰阶，因此可通过减小模拟数据电压的方式降低发光单元的发光亮度，和通过改变子帧对应的数字数据电压来缩短发光单元在一帧内的发光时长中的至少一种方式(例如以图7所示一帧包括四个子帧为例，可通过将原来四个子帧的数字数据电压0001改变为1110，使得原来的对应在第四子帧T4发光，加权为8，改变为在第一子帧T1、第二子帧T2和第三子帧T3发光，加权为1+2+4＝7)来减小发光单元的显示灰阶，使得发光单元的显示灰阶达到预设灰阶，并使得驱动芯片输出的显示驱动信号与预设灰阶对应，保证良好的显示效果。
图8是本申请一实施例提供的又一种显示装置的驱动方法的流程图，图9是本申请一实施例提供的另一种一帧内数据电压的时序图，参考图8和图9，在一实施例中，显示驱动信号包括模拟数据电压和数字数据电压；将一帧划分为模拟发光时段和数字发光时段，数字发光时段划分为多个子帧，多个子帧内发光单元的发光时长不同。
显示装置的驱动方法包括步骤410至步骤420。
在步骤410中，光学传感器检测检测区内发光单元在预设灰阶下的发光亮度并将亮度信号输出至驱动芯片。
在步骤420中，驱动芯片确定光学传感器输出的亮度信号和预设灰阶是否匹配，并在光学传感器输出的亮度信号和预设灰阶不匹配的情况下，补偿模拟发光时段内的模拟数据电压和数字发光时段内的数字数据电压中的至少之一。
与图7中时序图不同，图9所示时序图中包括模拟发光时段和数字发光时 段，在模拟发光时段，显示驱动信号包括模拟数据电压，且模拟发光时段可通过调节模拟数据电压的大小调节发光单元的发光亮度；在数字发光时段，显示驱动信号包括数字数据电压，且数据发光时段可通过调节子帧对应的数字数据电压来调节发光单元在数据发光时段的发光时长，但是因为将一帧划分成了模拟发光时段和数字发光时段，因此，相比于图7所示将一帧划分为子帧数，图9所示数字发光时段的子帧数可以相对较少，图9示意性地示出了数字发光时段划分为三个子帧。即第一子帧T1、第二子帧T2、第三子帧T3的情况。
本实施例提供的显示装置驱动方法，可在光学传感器输出的亮度信号和预设灰阶在不匹配的情况下，通过补偿模拟发光时段内模拟数据电压来调节模拟发光时段内发光单元的发光亮度，和通过补偿数字发光时段的数字数据电压来调节在数字发光时段内发光单元的发光时长中的至少一种方式来对灰阶进行调节，进而使得驱动芯片输出的显示驱动信号能够使得检测区内发光单元的发光亮度与预设灰阶相匹配，进而在显示时保证灰阶的正常显示。
需要说明的是，图9中仅示意性地示出了数字发光时段内每个子帧内发光阶段t2内对应的数据电压，数据写入阶段t1的数据电压未进行示出。还需说明的是，图9只是以在模拟发光时段模拟数据电压为一条斜线进行了示意性输出，但并不以此为限定，模拟发光时段可根据需要发光的亮度进行不同模拟数据电压大小的调节。
图10是本申请一实施例提供的又一种显示装置的结构俯视图，参考图10，在一实施例中，驱动芯片包括补偿模块510和驱动中心模块520。
驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号包括：
补偿模块510根据光学传感器输出的亮度信号和预设灰阶下的目标亮度信号对驱动中心模块520已经输出的显示驱动信号进行补偿，并将补偿后的显示驱动信号反馈至驱动中心模块520；
驱动中心模块520根据补偿后的显示驱动信号重新进行输出，直至光学传感器输出的亮度与预设灰阶下的目标亮度信号相匹配。
示例性的，补偿模块510可与光学传感器电连接，以接收光学传感器输出的亮度信号，并且补偿模块510内可存储有预设灰阶下的目标亮度信号，或者 驱动中心模块520可存储有预设灰阶下的目标亮度信号，补偿模块510可从驱动中心模块520获取预设灰阶下的目标亮度信号，进而补偿模块510根据光学传感器输出的亮度信号和预设灰阶下的目标亮度信号对驱动中心模块520已经输出的显示驱动信号进行补偿，并将补偿后的显示驱动信号反馈至驱动中心模块520。驱动中心模块520可以与数据线电连接，进而可通过数据线输出补偿后的显示驱动信号至发光单元对应的像素电路，输出后光学传感器可再次检测检测区内发光单元在预设灰阶下的发光亮度，并在该发光亮度与预设灰阶不匹配的情况下，通过补偿模块510再次进行补偿，以及再次通过驱动中心模块520输出补偿后的显示驱动信号，直至光学传感器输出的亮度与预设灰阶下的目标亮度信号相匹配，进而通过自反馈补偿的方式，实现灰阶的精准控制，保证良好的显示效果。
光学传感器检测检测区内发光单元在预设灰阶下的发光亮度包括：
在显示装置的开机时刻，以及每隔预设时间，光学传感器检测检测区内发光单元在预设灰阶下的发光亮度。
示例性的，因在显示装置的开机时刻，容易出现灰阶切换混乱的情况，以及随着显示装置的使用时间的延长，也可能出现灰阶切换混乱的情况，因此，通过在显示装置的开机时刻，以及每隔预设时间，光学传感器检测检测区内发光单元在预设灰阶下的发光亮度，然后驱动芯片根据光学传感器输出的亮度信号和预设灰阶确定预设灰阶对应的显示驱动信号，使得开机时刻和每隔预设时间，预设灰阶对应的显示驱动信号都可以被重新确定一次，进而保证了开机时刻灰阶的正常显示，以及随着显示装置使用时间的延长，灰阶可以正常显示，保证良好的显示效果。其中，预设时间可以预先在驱动芯片中进行设定。
在一实施例中，在开机时刻，仅控制检测区内的发光单元显示预设灰阶，而显示区内的发光单元不发光，待检测区内发光单元检测完毕，并最终确定在预设灰阶下的显示驱动信号后，再通过驱动芯片根据显示区的发光单元需要显示的灰阶和最终确定的显示驱动信号来进行输出，保证显示区内发光单元显示灰阶的准确性，保证开机后的灰阶的精准控制，避免灰阶切换时的显示异常，进而达到良好的显示效果。

Claims (17)

  1. 一种显示装置，包括：
    驱动芯片，
    显示面板，所述显示面板包括显示区和非显示区，所述非显示区包括检测区，所述显示区和所述检测区内设置有阵列排布的发光单元，所述检测区内的所述发光单元的出光侧设置有光学传感器，所述光学传感器与所述驱动芯片电连接，所述光学传感器设置为检测所述检测区内发光单元在预设灰阶下的发光亮度并将亮度信号输出至所述驱动芯片，
    其中，所述驱动芯片设置为根据所述光学传感器输出的亮度信号和所述预设灰阶确定所述预设灰阶对应的显示驱动信号。
  2. 根据权利要求1所述的显示装置，其中，所述检测区内所述发光单元的排布方式与所述显示区内所述发光单元的排布方式相同。
  3. 根据权利要求1所述的显示装置，其中，所述检测区内每行所述发光单元的数量少于所述显示区内每行所述发光单元的数量。
  4. 根据权利要求1所述的显示装置，其中，在所述检测区内，所述光学传感器远离所述发光单元的一侧设置有遮光层。
  5. 根据权利要求1所述的显示装置，其中，所述发光单元至少包括红光发光单元、绿光发光单元和蓝光发光单元。
  6. 根据权利要求1所述的显示装置，其中，所述光学传感器为灰阶检测传感器。
  7. 根据权利要求1所述的显示装置，其中，所述光学传感器与所述检测区内的发光单元一一对应。
  8. 根据权利要求1所述的显示装置，其中，所述预设灰阶为全部灰阶或所述全部灰阶中的部分灰阶。
  9. 根据权利要求3所述的显示装置，其中，所述检测区内每行发光单元包括三个相邻的红光发光单元、三个相邻的绿光发光单元以及三个相邻的蓝光发光单元，且所述三个相邻的红光发光单元与所述三个相邻的绿光发光单元之间设置有牺牲单元，所述三个相邻的绿光发光单元与所述三个相邻的蓝光发光单元之间设置有牺牲单元，所述牺牲单元不发光。
  10. 根据权利要求9所述的显示装置，其中，三个相邻的相同颜色的发光单元的出光侧设置一个所述光学传感器。
  11. 根据权利要求1所述的显示装置，其中，所述显示装置包括基底，所 述检测区内的发光单元和所述显示区内的发光单元设置于所述基底的同一侧。
  12. 一种显示装置的驱动方法，所述显示装置包括显示面板和与显示面板电连接的驱动芯片；其中，所述显示面板包括显示区和检测区，所述显示区和所述检测区内设置有阵列排布的发光单元，在所述检测区内所述发光单元的出光侧设置有光学传感器，所述光学传感器与所述驱动芯片电连接；
    所述显示装置的驱动方法包括：
    所述光学传感器检测所述检测区内所述发光单元在预设灰阶下的发光亮度并将亮度信号输出至所述驱动芯片；
    所述驱动芯片根据所述光学传感器输出的亮度信号和所述预设灰阶确定所述预设灰阶对应的显示驱动信号。
  13. 根据权利要求12所述的显示装置的驱动方法，其中，所述显示驱动信号包括模拟数据电压和数字数据电压；
    将一帧图像划分为多个子帧，多个子帧内所述发光单元的发光时长不同；其中，所述驱动芯片根据所述光学传感器输出的亮度信号和所述预设灰阶确定所述预设显示灰阶对应的显示驱动信号包括：
    所述驱动芯片确定所述光学传感器输出的亮度信号和所述预设灰阶是否匹配，并在所述光学传感器输出的亮度信号和所述预设灰阶不匹配的情况下，补偿所述数字数据电压和所述模拟数据电压中至少之一。
  14. 根据权利要求13所述的显示装置的驱动方法，其中，所述在所述光学传感器输出的亮度信号和所述预设灰阶不匹配的情况下，补偿所述数字数据电压和所述模拟数据电压中至少之一，包括：
    在所述光学传感器输出的亮度信号小于所述预设灰阶下对应的目标亮度信号的情况下，执行以下至少之一：增大所述模拟数据电压，改变所述子帧对应的数字数据电压以延长所述发光单元在一帧内的发光时长中的至少一种方式；
    在所述光学传感器输出的亮度信号大于所述预设灰阶下对应的目标亮度信号的情况下，执行以下至少之一：减小所述模拟数据电压，改变所述子帧对应的数字数据电压以缩短所述发光单元在一帧内的发光时长中的至少一种方式。
  15. 根据权利要求12所述的显示装置的驱动方法，其中，所述显示驱动信号包括模拟数据电压和数字数据电压；
    将一帧划分为模拟发光时段和数字发光时段，所述数字发光时段划分为多个子帧，多个子帧内所述发光单元的发光时长不同；其中，所述驱动芯片根据 所述光学传感器输出的亮度信号和所述预设灰阶确定所述预设灰阶对应的显示驱动信号包括：
    所述驱动芯片确定所述光学传感器输出的亮度信号和所述预设灰阶是否匹配，并在所述光学传感器输出的亮度信号和所述预设灰阶不匹配的情况下，补偿所述模拟发光时段内的模拟数据电压和数字发光时段内的数字数据电压中的至少之一。
  16. 根据权利要求12所述的显示装置的驱动方法，其中，所述驱动芯片包括补偿模块和驱动中心模块，
    所述驱动芯片根据所述光学传感器输出的亮度信号和所述预设灰阶确定所述预设灰阶对应的显示驱动信号包括：
    所述补偿模块根据所述光学传感器输出的亮度信号和所述预设灰阶下的目标亮度信号对所述驱动中心模块已经输出的显示驱动信号进行补偿，并将补偿后的显示驱动信号反馈至所述驱动中心模块；
    所述驱动中心模块根据所述补偿后的显示驱动信号重新进行输出，直至所述光学传感器输出的亮度与所述预设灰阶下的目标亮度信号相匹配。
  17. 根据权利要求12所述的显示装置的驱动方法，其中，所述光学传感器检测所述检测区内所述发光单元在预设灰阶下的发光亮度包括：
    在所述显示装置的开机时刻，以及每隔预设时间，所述光学传感器检测所述检测区内所述发光单元在所述预设灰阶下的发光亮度。
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