CN115171547A - Display substrate, driving method thereof and display device - Google Patents
Display substrate, driving method thereof and display device Download PDFInfo
- Publication number
- CN115171547A CN115171547A CN202210530704.4A CN202210530704A CN115171547A CN 115171547 A CN115171547 A CN 115171547A CN 202210530704 A CN202210530704 A CN 202210530704A CN 115171547 A CN115171547 A CN 115171547A
- Authority
- CN
- China
- Prior art keywords
- color
- display substrate
- color shift
- unit
- units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003086 colorant Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 229910021389 graphene Inorganic materials 0.000 claims description 31
- 238000005259 measurement Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 29
- 239000010408 film Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
Abstract
The application provides a display substrate, a driving method thereof and a display device. Each pixel unit comprises a plurality of organic light-emitting sub-pixels capable of emitting light of different colors. Each color shift adjusting unit is configured to emit light of different colors under different voltages. At least one color cast adjusting unit is correspondingly arranged on each pixel unit. The color cast adjusting unit is positioned between adjacent organic light-emitting sub-pixels in the corresponding pixel unit. The display substrate is provided with a plurality of color cast adjusting units, and the color of the light emitted by the color cast adjusting units is adjusted by changing the voltage applied to the color cast adjusting units, so that the color cast phenomenon is improved or avoided by the color cast adjusting units.
Description
Technical Field
The application relates to the technical field of display, in particular to a display substrate, a driving method thereof and a display device.
Background
With the wide use of electronic display products in daily life, users have made higher and higher demands on the display performance of electronic display products.
However, when the current electronic display product is used for a long time or the refresh frequency changes, the color cast of the image displayed on the whole display substrate may occur compared with the preset image, which may cause distortion of the displayed image and decrease of the contrast ratio, thereby reducing the user experience effect.
Disclosure of Invention
In view of the above, the present application provides a display substrate, a driving method thereof and a display device, in which a plurality of color shift adjusting units are disposed, and the color of light emitted from the color shift adjusting units is adjusted by changing the magnitude of voltage applied to the color shift adjusting units, thereby improving or avoiding the color shift phenomenon using the color shift adjusting units.
A first aspect of the present application provides a display substrate including a plurality of pixel units and a plurality of color shift adjusting units. Each pixel unit comprises a plurality of organic light-emitting sub-pixels capable of emitting light of different colors. Each color shift adjusting unit is configured to emit light of different colors under different voltages. At least one color cast adjusting unit is correspondingly arranged in each pixel unit. The color cast adjusting unit is positioned between adjacent organic light-emitting sub-pixels in the corresponding pixel unit.
In the above scheme, the color of the light emitted by the color shift adjusting unit is adjusted by changing the voltage applied to the color shift adjusting unit, so that the color shift compensation is performed on the main color of the color shift of the display substrate by using the color shift adjusting unit, and the color shift phenomenon is further improved or avoided. In addition, the color shift adjusting units are positioned between adjacent organic light emitting sub-pixels in the corresponding pixel units, so that the total thickness of the display substrate cannot be additionally increased due to the arrangement of the plurality of color shift adjusting units.
In a specific embodiment of the first aspect of the present application, the luminescent material of the color shift adjusting unit is partially reduced graphene oxide or a composite material containing partially reduced graphene oxide.
In a particular embodiment of the first aspect of the present application, the display substrate further comprises a monitoring unit and a control unit. And the monitoring unit is configured to monitor the chromaticity when the image is displayed so as to obtain chromaticity measurement results corresponding to the plurality of organic light-emitting sub-pixels. The control unit is connected with the monitoring unit and is configured to acquire chromaticity measurement results corresponding to the plurality of organic light-emitting sub-pixels so as to adjust the voltage applied to the color cast adjusting unit.
In a specific embodiment of the first aspect of the present application, the colorimetric measurement result is a measurement color coordinate, and the display substrate further comprises a calculation unit. The calculating unit is used for calculating the difference between the measured color coordinates corresponding to the plurality of organic light-emitting sub-pixels and the standard color coordinates corresponding to the measured color coordinates respectively, and calculating the driving voltage required by the corresponding color cast adjusting unit when the difference is not less than a preset value. The control unit is also used for carrying out voltage drive on the corresponding color cast adjusting unit according to the driving voltage so as to carry out color cast compensation.
In a specific implementation manner of the first aspect of the present application, a plurality of color shift adjusting units are correspondingly disposed in each pixel unit, and the color shift adjusting units correspond to the organic light emitting sub-pixels in the pixel units one to one.
In one embodiment of the first aspect of the present application, the display substrate further comprises an array substrate and a pixel defining layer. The array substrate includes a plurality of driving units divided into a plurality of first-type driving units corresponding to the plurality of organic light emitting sub-pixels and a plurality of second-type driving units corresponding to the plurality of color shift adjusting units. And the pixel defining layer is positioned on one side of the array substrate and is configured to separate a light emitting area of a region where each organic light-emitting sub-pixel is positioned from a light emitting area of a region where each color cast adjusting unit is positioned. The plurality of color cast adjusting units are arranged on the array substrate.
In a specific implementation manner of the first aspect of the present application, the plurality of driving units include a gate and a source drain, the color shift adjusting unit is electrically connected to a gate in the corresponding second type of driving unit, and the gate in the second type of driving unit applies different voltages to the corresponding color shift adjusting unit to adjust a color of light that can be emitted by the corresponding color shift adjusting unit. Furthermore, the color shift adjusting unit is electrically connected with the source and drain electrodes in the corresponding second type of driving unit, and different voltages are applied to the source and drain electrodes in the second type of driving unit by the corresponding color shift adjusting unit to adjust the brightness of emergent light of the color shift adjusting unit.
In a specific embodiment of the first aspect of the present application, each organic light emitting sub-pixel at least includes an anode, an organic light emitting layer, and a cathode, which are stacked, the cathode is disposed on a side of the pixel defining layer away from the array substrate, and a plurality of through holes are disposed on the cathode and the pixel defining layer at positions corresponding to the plurality of color shift adjusting units, and a light emitting area in a region where the color shift adjusting unit is located at least partially overlaps with a region where the corresponding plurality of through holes are located.
A second aspect of the present application provides a display device comprising the display substrate of any one of the embodiments of the first aspect described above.
A third aspect of the present application provides a method for driving a display substrate according to any one of the embodiments of the first aspect, where the method includes adjusting a voltage applied to at least one color shift adjusting unit of a plurality of color shift adjusting units in the display substrate when the display substrate generates a color shift, so as to perform color shift compensation on the display substrate. Each color shift adjusting unit is configured to emit light of different colors under different voltages.
Drawings
Fig. 1 is a schematic plan view illustrating a display substrate according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of a partially enlarged planar structure in a display region of the display substrate shown in fig. 1.
Fig. 3 is a block diagram of a display substrate according to an embodiment of the disclosure.
Fig. 4 is a block diagram of a display substrate according to another embodiment of the present disclosure.
Fig. 5 is an enlarged partial cross-sectional view of the display substrate of fig. 1 taken along MM' within the display area.
Fig. 6 is another enlarged partial cross-sectional view of the display substrate of fig. 1 taken along MM' within the display area.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The display substrate generally includes a plurality of pixel units, each including a plurality of organic light emitting sub-pixels capable of emitting light of different colors. In one case, the organic light emitting materials used in the plurality of organic light emitting sub-pixels are different, so that the luminance degradation degree of the plurality of organic light emitting sub-pixels is different as the service life of the display substrate is prolonged. For example, assuming that the plurality of organic light emitting sub-pixels are a green sub-pixel G capable of emitting green light, a blue sub-pixel B capable of emitting blue light, and a red sub-pixel R capable of emitting red light, respectively, when the display substrate displays white light, the luminance of green light emitted from the green sub-pixel G: luminance of red light emitted from the red subpixel R: luminance of blue light emitted from the blue subpixel B =69:21:10. after the display substrate is used for a period of time, the brightness of the green sub-pixel G, the red sub-pixel R and the blue sub-pixel B decreases at different rates, so that the ratio of the brightness of the three sub-pixels deviates from 69:21:10, color cast phenomenon is easy to occur. In another case, the same display substrate usually displays different frames at different refresh frequencies, and when the refresh frequency changes, due to different on-voltages (Von) of different sub-pixels and different equivalent capacitances, the ratio of the light emitting time corresponding to different organic light emitting sub-pixels at different refresh frequencies is unbalanced, and thus color shift may occur. Hereinafter, the display substrates before being improved by the technical scheme of the present application will be collectively referred to as original display substrates.
In view of the above, at least one embodiment of the present application provides a display substrate, a driving method thereof and a display device, which can solve at least the above problems, wherein a plurality of color shift adjusting units are disposed in the display substrate, and the color of light emitted from the color shift adjusting units is adjusted by changing the voltage applied to the color shift adjusting units, so that the color shift phenomenon occurring in the original display substrate is improved or avoided by the color shift adjusting units.
Hereinafter, a display substrate, a driving method thereof, and a display device according to at least one embodiment of the present application will be described with reference to the accompanying drawings. In addition, in the drawings, a spatial rectangular coordinate system in which an X axis and a Y axis are parallel to a plane in which the display substrate is located and a Z axis is perpendicular to the plane in which the display substrate is located is established with reference to a substrate of the display substrate to assist in explaining a positional relationship of respective structures in the display substrate. In addition, in the embodiments of the present application, "thickness" is defined with reference to a substrate, and for example, for an object located on one side of the substrate, the difference between the vertical distance from the end of the object farthest from the substrate to the substrate and the vertical distance from the end closest to the substrate is the thickness of the object.
Referring to fig. 1, the display substrate 100 has a display region 10 and a wiring region 20. The display area 10 is used for displaying an image. The wiring region 20 is used for signal lines for applying signals to the display region 10. The display substrate 100 may include a bonding region, a bending region, and the like in addition to the display region 10 and the wiring region 20.
In the following description, the plurality of organic light emitting sub-pixels are exemplified as the green sub-pixel G, the blue sub-pixel B, and the red sub-pixel R, and for example, the plurality of organic light emitting sub-pixels may further include one or more organic light emitting sub-pixels among a yellow sub-pixel capable of emitting yellow light, a cyan sub-pixel capable of emitting cyan light, and a white sub-pixel capable of emitting white light. The arrangement pattern of the plurality of organic light emitting sub-pixels may be a staggered arrangement pattern as shown in fig. 1, or may be a pattern such as a non-staggered arrangement or a non-shared Mask (Mask). The shape of the openings of the plurality of organic light emitting sub-pixels may be rectangular as shown in fig. 1, or may be designed into other shapes such as a square. The aperture shapes of the plurality of organic light emitting sub-pixels may have area sizes ranging from the blue sub-pixel B, the red sub-pixel R, and the green sub-pixel G in this order as shown in fig. 1, or may be arranged in another way, for example, the aperture shape of the blue sub-pixel B has an area larger than the aperture shape of the red sub-pixel R and the aperture shape of the green sub-pixel G, and the aperture shape of the red sub-pixel R has an area equal to the aperture shape of the green sub-pixel G.
The display substrate 100 may be any one of a Low Temperature Polysilicon (LTPS) substrate and an Indium Gallium Zinc Oxide (IGZO) substrate or a combination of the two substrates. For example, the display substrate 100 may include a substrate, a barrier layer, a buffer layer, a gate insulating layer, a capacitor insulating layer, an interlayer dielectric layer, a planarization layer, an encapsulation layer, and the like, and a specific film structure of the display substrate 100 may be selected according to actual needs.
In a display substrate provided in at least one embodiment of the present application, referring to fig. 1 to 6, within a display area 10, the display substrate 100 includes a plurality of pixel units 110 and a plurality of color shift adjusting units 120. Each pixel unit 110 includes a plurality of organic light emitting sub-pixels 111 that can emit light of different colors. Each color shift adjusting unit 120 is configured to have a structure that can emit light of different colors at different voltages. At least one color shift adjusting unit 120 is correspondingly arranged on each pixel unit 110. The color shift adjusting unit 120 is located between adjacent organic light emitting sub-pixels in the corresponding pixel unit. Therefore, if the display substrate generates color cast, the color of the light emitted by the color cast adjusting unit can be adjusted by changing the voltage applied to the color cast adjusting unit, so that the color cast main color of the original display substrate is compensated by using the color cast adjusting unit, and the problem of color cast phenomenon can be improved or avoided. In addition, the color shift adjusting units are located between adjacent organic light emitting sub-pixels in the corresponding pixel units, so that the total thickness of the display substrate cannot be additionally increased due to the arrangement of the plurality of color shift adjusting units.
It should be noted that, in different pixel units, the positions and the number of the corresponding color shift adjusting units 120 may be the same or different. The display of the display substrate can be performed by a plurality of organic light emitting sub-pixels, so that the display substrate can normally display a picture. The color shift adjusting unit 120 may be in an inoperative state when the display substrate does not have a color shift, for example, the color shift adjusting unit 120 may be turned off to keep the light without emitting any color, and not affect the normal display of the display substrate, and the color shift adjusting unit 120 may be in an operative state when the display substrate has a color shift, for example, a certain voltage may be applied to the color shift adjusting unit according to an actual requirement to emit light of a specific color, so as to perform an auxiliary function of compensating the color shift. The color of light that can be emitted by the color shift adjusting unit 120 may be a single color, or may be a mixed color of multiple colors, including but not limited to a single color that any one of the multiple organic light emitting sub-pixels can emit light, and a mixed color that any combination of the multiple organic light emitting sub-pixels can emit light.
In the display substrate provided in the embodiment of the present application, the color shift adjusting unit 120 may be any structural unit that can emit light of different colors under different voltages, and on this basis, the material of the color shift adjusting unit 120 may be set according to the requirements of the actual process, which is not limited herein. Next, in several embodiments, a material of the color shift adjusting unit 120 will be described.
In the display substrate provided in at least one embodiment of the present application, the light emitting material of the color shift adjusting unit 120 is partially reduced graphene oxide or a composite material containing partially reduced graphene oxide. Therefore, the color shift adjusting unit made of the material at least comprising the partially reduced graphene oxide can emit light with different colors when different voltages are applied, and the color of the light emitted by the color shift adjusting unit 120 can be adjusted to any required color by utilizing the characteristics of electroluminescence and color adjustability of the partially reduced graphene oxide, so that the effect of color shift compensation is achieved. In addition, since graphene has high toughness and mechanical strength, the impact resistance of the display substrate may also be improved.
It should be noted that, the partially reduced Graphene Oxide is color-tunable Graphene at an interface between Graphene Oxide (GO) and reduced Graphene Oxide (rGO), and there are a series of discrete energy levels, different colors of light can be emitted when different voltages are applied, and the emission wavelength of the different colors of light almost covers the whole visible light spectrum, for example, the emission wavelength of the different colors of light is continuously tunable from 300nm to 1000 nm.
For example, in some embodiments, the partially reduced graphene oxide may be a semiconductor reduced graphene oxide. The fermi level of the semiconductor reduced graphene oxide can be adjusted by the electric field generated by the voltage, so that the light emitting wavelength of the semiconductor reduced graphene oxide can be adjusted, and the color of the emergent light of the color cast adjusting unit 120 can be changed by adjusting the voltage.
For another example, in some embodiments, the structure of the partially reduced graphene oxide may be a composite structure including at least one graphene film and a graphene oxide film. Therefore, the light emitting color of the color cast adjusting unit can be adjusted and controlled by utilizing the graphene material in the composite structure.
For example, the composite structure may include a graphene film, a graphene quantum dot layer, and a graphene oxide film, which are sequentially stacked, and the graphene/graphene oxide double-layer film may adjust the light emitting color of the color shift adjusting unit by changing the magnitude of the voltage.
It should be noted that the light-emitting material of the color shift adjusting unit 120 includes, but is not limited to, partially reduced graphene oxide or a composite material containing partially reduced graphene oxide, as long as color adjustability of the color shift adjusting unit under different voltages can be achieved.
In the display substrate provided in at least one embodiment of the present application, referring to fig. 3, the display substrate 100 further includes a monitoring unit 130 and a control unit 140. The monitoring unit 130 is configured to monitor chromaticity when displaying an image to obtain measurement results corresponding to the plurality of organic light emitting sub-pixels. The control unit 140 is connected to the monitoring unit 130, and is configured to obtain chromaticity measurement results corresponding to the plurality of organic light emitting sub-pixels to adjust the voltage applied to the color shift adjusting unit 120. In this way, the monitoring unit 130 and the control unit 140 may obtain the chromaticity measurement results corresponding to the plurality of organic light-emitting sub-pixels, so that the voltage applied to the color shift adjusting unit 120 may be determined in time according to the chromaticity measurement results corresponding to the plurality of organic light-emitting sub-pixels, so that the light emitted after the voltage is applied to the color shift adjusting unit 120 may achieve the color shift compensation effect, thereby avoiding or improving the color shift phenomenon, and further improving the user experience effect.
The image may be a preset image called by the control unit 140 from the display substrate, an image of the display substrate in a mode such as a message screen, an image displayed by the display substrate in real time or at preset time intervals, and the like. The chromaticity measurement result can be a measurement color coordinate, and can also be a measurement electric signal corresponding to the measurement color coordinate.
For example, in some embodiments, referring to fig. 4, if the measurement result is a measurement color coordinate, the display substrate 100 further includes a calculation unit 150. The calculating unit 150 is configured to calculate difference values between the measured color coordinates corresponding to the plurality of organic light emitting sub-pixels and the standard color coordinates corresponding to the measured color coordinates, respectively, and calculate a driving voltage required by the corresponding color shift adjusting unit when the difference values are not less than a preset value. The control unit 140 is further configured to perform voltage driving on the corresponding color shift adjusting unit according to the driving voltage to perform color shift compensation. For example, the monitoring unit 130 may monitor chromaticity when an image is displayed, convert the chromaticity into an electrical signal, and send the electrical signal to the calculating unit 150, the calculating unit 150 may calculate measured color coordinates corresponding to a plurality of organic light emitting sub-pixels based on the electrical signal, compare the measured color coordinates corresponding to each organic light emitting sub-pixel with the standard color coordinates, and if a difference between the measured color coordinates and the standard color coordinates is greater than a preset value (e.g., the preset value may be 0.005, etc.), the calculating unit 150 may determine a voltage applied to the corresponding color shift adjusting unit according to the difference.
For another example, if the measurement result is a measurement electrical signal, the control unit 140 may acquire the measurement electrical signal from the monitoring unit 130, directly determine whether the degree of color is satisfactory based on the measurement electrical signal, and send an instruction signal indicating whether or not voltage needs to be applied and the magnitude of the applied voltage according to the result of the determination.
In the following, the correspondence relationship between a plurality of color shift adjusting units and pixel units provided in at least one embodiment of the present application is illustrated by several specific embodiments. The following description will be given by taking, as an example, a green sub-pixel G capable of emitting green light, a blue sub-pixel B capable of emitting blue light, and a red sub-pixel R capable of emitting red light as the plurality of organic light emitting sub-pixels.
In the display substrate provided in at least one embodiment of the present application, each pixel unit may be provided with a plurality of color shift adjusting units. Further, the color shift adjusting units may correspond one-to-one to the organic light emitting sub-pixels in the pixel unit.
For example, in some embodiments, the plurality of color shift adjusting units may include any combination of a first color shift adjusting unit corresponding to the green sub-pixel G, a second color shift adjusting unit corresponding to the blue sub-pixel B, and a third color shift adjusting unit corresponding to the red sub-pixel R. The first color shift adjusting unit is used for emitting green light under a certain voltage when the green sub-pixel G generates color shift on the display substrate due to brightness attenuation or refresh frequency change, so as to play an auxiliary function of compensating the color shift generated on the display substrate. The second color shift adjusting unit is used for emitting blue light under a certain voltage when the display substrate generates color shift due to brightness attenuation or refresh frequency change of the blue sub-pixel B, so as to play an auxiliary function of compensating the color shift generated by the display substrate. The third color shift adjusting unit is used for emitting red light under a certain voltage when the red sub-pixel R causes color shift of the display substrate due to brightness attenuation or refresh frequency change, so as to play an auxiliary function of compensating the color shift of the display substrate. Therefore, the first color bias adjusting unit can be used for carrying out chromaticity compensation on the green sub-pixel G, the second color bias adjusting unit is used for carrying out chromaticity compensation on the blue sub-pixel B, and the third color bias adjusting unit is used for carrying out chromaticity compensation on the red sub-pixel R.
For example, in other embodiments, the plurality of color shift adjusting units may include a first color shift adjusting unit corresponding to the green sub-pixel G and a fourth color shift adjusting unit corresponding to the blue sub-pixel B and the red sub-pixel R, and the fourth color shift adjusting unit is configured to emit light of a mixed color composed of blue and red colors at a certain voltage when the display substrate is color-shifted due to brightness attenuation or refresh frequency change of the blue sub-pixel B and the red sub-pixel R, so as to perform an auxiliary function of compensating the color shift of the display substrate. Therefore, the fourth color cast adjusting unit is used for carrying out the chromaticity compensation on the blue sub-pixel B and the red sub-pixel R, and the types and the number of the color cast adjusting units can be effectively reduced.
The main color of the color shift may be blue, red, green, yellow, or the like.
In the display substrate provided in at least one embodiment of the present application, at least one color shift adjusting unit is a color shift adjusting unit, that is, one color shift adjusting unit is correspondingly disposed in each pixel unit. For example, one color shift adjusting unit may be, for example, a first color shift adjusting unit, a second color shift adjusting unit, or a third color shift adjusting unit, and one color shift adjusting unit may also emit light of a mixed color composed of any plurality of colors, such as a fourth color shift adjusting unit, which is not limited in this application.
In the display substrate provided in at least one embodiment of the present application, referring to fig. 5 and 6, the display substrate 100 further includes an array substrate 160 and a pixel defining layer 170. The array substrate 160 includes a plurality of driving units 161, and the plurality of driving units 161 are divided into a plurality of first-type driving units 1611 corresponding to a plurality of organic light emitting sub-pixels and a plurality of second-type driving units 1612 corresponding to a plurality of color shift adjusting units. A pixel defining layer 170 on one side of the array substrate 160, configured to separate a light emitting region 1 in a region where each organic light emitting sub-pixel is located and a light emitting region 2 in a region where each color shift adjusting unit is located; the plurality of color shift adjusting units 120 are disposed on the array substrate 160. In this way, each color shift adjusting unit 120 can independently use the corresponding second type driving unit to apply a voltage, which is beneficial to adjusting the color shift generated by each pixel unit in a finer granularity, and further enables the display effect of the display substrate to be better.
In the display substrate provided in at least one embodiment of the present application, the plurality of driving units 161 include a gate electrode and a source drain electrode. The color shift adjusting unit 120 is electrically connected to the gate of the corresponding second-type driving unit 1612. The gates in the second-type driving unit 1612 apply different voltages to the corresponding color shift adjusting units to adjust the colors of the light which can be emitted by the corresponding color shift adjusting units. Therefore, the voltage applied to the corresponding color shift adjusting unit by the grid electrode in the second-type driving unit 1612 can be directly changed, so that the corresponding color shift adjusting unit is controlled by the electrostatic field to adjust the carrier doping concentration, the electrical adjustability of the color of the emergent light of the corresponding color shift adjusting unit is realized, the light-emitting wavelength is continuously adjustable from a range of 300nm to 1000nm, and the color shift compensation is realized by using the color of the emergent light corresponding to the color shift adjusting unit. In addition, since the second type driving unit is disposed in the array substrate 160, the structure of the display substrate is more compact.
For example, when the light emitting material of the color shift adjusting unit 120 includes at least one composite structure formed by a graphene film and a graphene oxide film. If the voltage applied to the corresponding color shift adjusting unit by the gate electrode in the second type driving unit 1612 is 0V, the corresponding color shift adjusting unit can emit red light with the wavelength of about 550nm to 750nm, if the voltage applied to the corresponding color shift adjusting unit by the gate electrode in the second type driving unit 1612 is 30V, the corresponding color shift adjusting unit can emit green light with the wavelength of about 500nm to 600nm, and if the voltage applied to the corresponding color shift adjusting unit by the gate electrode in the second type driving unit 1612 is 60V, the corresponding color shift adjusting unit can emit blue light with the wavelength of about 450nm to 550 nm.
Further, in other embodiments, the color shift adjusting unit 120 may further be electrically connected to a source and a drain of the second type driving unit 1612, and the source and the drain of the second type driving unit 1612 apply different voltages to the corresponding color shift adjusting unit to adjust the brightness of light emitted by the corresponding color shift adjusting unit. Therefore, the larger the voltage applied by the source and the drain is, the larger the input current is, the higher the luminous intensity of the corresponding color shift adjusting unit is, so that the brightness of emergent light of the corresponding color shift adjusting unit can be controlled by changing the voltage of the source and the drain, the chromaticity of emergent light of the corresponding color shift adjusting unit can be adjusted in a more precise mode, and the elimination of the color shift of the original display substrate is facilitated.
For example, when the light emitting material of the color shift adjusting unit 120 includes semiconductor reduced graphene oxide, if the gate voltage is between 0V and 10V and the source-drain voltage is greater than the turn-on voltage, the color shift adjusting unit 120 may emit red light; when the gate voltage is between 20V and 30V and the source-drain voltage is greater than the turn-on voltage, the color shift adjusting unit 120 can emit green light; when the gate voltage is between 40V and 50V and the source-drain voltage is greater than the turn-on voltage, the color shift adjusting unit 120 can emit blue light. In addition, by changing the magnitude of the source-drain voltage, the intensity of the light emitted by the corresponding color shift adjusting unit 120 can be changed, so that the gray scale can be adjusted, and further, the chromaticity of the light emitted by the corresponding color shift adjusting unit can be adjusted in a more precise manner.
In the display substrate provided in at least one embodiment of the present application, each organic light emitting sub-pixel 111 includes at least an anode 1111, an organic light emitting layer 1112, and a cathode 1113, which are stacked, the cathode 1113 is disposed on a side of the pixel defining layer 170 facing away from the array substrate 160, and a plurality of through holes K are disposed on the cathode 1113 and the pixel defining layer 170 at positions corresponding to the plurality of color shift adjusting units 120, and a light emitting region 2 in a region where the color shift adjusting units are disposed at least partially overlaps with a region where the corresponding through holes K are disposed. Thus, the light emitted by the color shift adjusting unit is not completely shielded by the cathode 1113 and the pixel defining layer 170, and the more the overlapped area is, the more the light emitted by the color shift adjusting unit is used for color shift compensation.
The organic light-emitting layer 1112 may include a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer, and may further include an electron blocking layer or the like.
At least one embodiment of the present application further provides a display device, which includes the display substrate in any of the above embodiments.
It should be noted that the display substrate may be an equivalent or obviously modified display substrate of any of the above embodiments. In addition, the display device may further include other structures such as an encapsulation layer for encapsulating the light emitting device, a light extraction layer for extracting or straightening out the corresponding emitted light of the plurality of organic light emitting sub-pixels, and other auxiliary optical films such as a polarizer, according to actual needs. The display device may specifically include, but is not limited to, at least one electronic display product of a mobile phone, a tablet computer, an e-book reader, a player, a digital camera, a laptop portable computer, a vehicle computer, a desktop computer, a set-top box, a smart tv, and a wearable device.
Since the display device according to the embodiment of the present application includes all technical solutions of the embodiments shown in fig. 1 to 6, at least all technical effects can be achieved, and details are not described here.
At least one embodiment of the present application further provides a driving method of a display substrate, where the driving method includes adjusting a voltage applied to at least one of a plurality of color shift adjusting units in the display substrate when the display substrate generates a color shift, so as to perform color shift compensation on the display substrate. Each color shift adjusting unit is configured to emit light of different colors under different voltages.
It should be noted that the display substrate may be the display substrate in any embodiment of the above all embodiments, or may be the display substrate after equivalent replacement or obvious modification of any display substrate in all embodiments.
Since the driving method is the driving method corresponding to the display substrate in the embodiment shown in fig. 1 to 6, and includes all technical solutions of the embodiments shown in fig. 1 to 6, the detailed implementation of the driving method can refer to the description in the related embodiment of the display substrate, and at least can achieve all the technical effects, and will not be described herein again. The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents and the like that are within the spirit and scope of the present application should be included.
Claims (10)
1. A display substrate, comprising:
a plurality of pixel units, each of which includes a plurality of organic light emitting sub-pixels capable of emitting light of different colors; and
a plurality of color shift adjusting units, each of which is configured to have a function of emitting light of a different color at a different voltage;
and each pixel unit is correspondingly provided with at least one color cast adjusting unit, and the color cast adjusting units are positioned between adjacent organic light-emitting sub-pixels in the corresponding pixel units.
2. The display substrate according to claim 1, wherein the light-emitting material of the color shift adjusting unit is partially reduced graphene oxide or a composite material containing the partially reduced graphene oxide.
3. The display substrate of claim 1, further comprising:
a monitoring unit configured to monitor chromaticity when an image is displayed to obtain chromaticity measurement results corresponding to the plurality of organic light emitting sub-pixels;
and the control unit is connected with the monitoring unit and is configured to acquire chromaticity measurement results corresponding to the plurality of organic light-emitting sub-pixels so as to adjust the voltage applied to the color cast adjusting unit.
4. The display substrate of claim 3, wherein the colorimetric measurement is a measurement of color coordinates, the display substrate further comprising:
the calculation unit is used for respectively calculating the difference value between the measurement color coordinate corresponding to the plurality of organic light-emitting sub-pixels and the standard color coordinate corresponding to the measurement color coordinate, and calculating the driving voltage required by the corresponding color cast adjustment unit when the difference value is not less than a preset value;
and the control unit is also used for carrying out voltage drive on the corresponding color cast adjusting unit according to the driving voltage so as to carry out color cast compensation.
5. The display substrate according to claim 1, wherein a plurality of the color shift adjusting units are correspondingly arranged in each pixel unit, and the color shift adjusting units are in one-to-one correspondence with the organic light emitting sub-pixels in the pixel units.
6. The display substrate according to any one of claims 1 to 5, further comprising:
the array substrate comprises a plurality of driving units, wherein the driving units are divided into a plurality of first driving units corresponding to the organic light-emitting sub-pixels and a plurality of second driving units corresponding to the color cast adjusting units;
the pixel defining layer is positioned on one side of the array substrate and is configured to separate a light emitting area of a region where each organic light-emitting sub-pixel is positioned from a light emitting area of a region where each color cast adjusting unit is positioned;
the plurality of color shift adjusting units are disposed on the array substrate.
7. The display substrate according to claim 6, wherein the plurality of driving units include gates and source and drain electrodes, the color shift adjusting unit is electrically connected to the corresponding gates in the second type of driving unit, the gates in the second type of driving unit apply different voltages to the corresponding color shift adjusting units to adjust the color of light that can be emitted by the color shift adjusting unit, preferably, the color shift adjusting unit is electrically connected to the corresponding source and drain electrodes in the second type of driving unit, and the source and drain electrodes in the second type of driving unit apply different voltages to the corresponding color shift adjusting units to adjust the brightness of light that can be emitted by the color shift adjusting unit.
8. The display substrate of claim 6, wherein each of the organic light emitting sub-pixels comprises at least an anode, an organic light emitting layer and a cathode arranged in a stack,
the cathode is arranged on one side of the pixel defining layer, which is far away from the array substrate, a plurality of through holes are arranged on the cathode and the pixel defining layer at positions corresponding to the plurality of color cast adjusting units, and a light emitting area of the area where the color cast adjusting units are located is at least partially overlapped with the area where the corresponding through holes are located.
9. A display device comprising the display substrate according to any one of claims 1 to 8.
10. A method of driving a display substrate according to any one of claims 1 to 8, comprising:
when the display substrate generates color cast, adjusting the voltage applied to at least one color cast adjusting unit in a plurality of color cast adjusting units in the display substrate to perform color cast compensation on the display substrate, wherein each color cast adjusting unit is configured to emit light with different colors under different voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210530704.4A CN115171547B (en) | 2022-05-16 | 2022-05-16 | Display substrate, driving method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210530704.4A CN115171547B (en) | 2022-05-16 | 2022-05-16 | Display substrate, driving method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115171547A true CN115171547A (en) | 2022-10-11 |
| CN115171547B CN115171547B (en) | 2023-11-28 |
Family
ID=83482897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210530704.4A Active CN115171547B (en) | 2022-05-16 | 2022-05-16 | Display substrate, driving method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115171547B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005071702A (en) * | 2003-08-21 | 2005-03-17 | Advanced Display Inc | Planar light source device and display device having device |
| US20150311269A1 (en) * | 2014-04-23 | 2015-10-29 | Innolux Corporation | Display substrate and display device applying the same |
| CN105280139A (en) * | 2015-11-11 | 2016-01-27 | 深圳市华星光电技术有限公司 | AMOLED brightness compensation method and AMOLED driving system |
| CN105785685A (en) * | 2016-05-11 | 2016-07-20 | 深圳市华星光电技术有限公司 | Double-side display, display module and TFT (Thin Film Transistor) array base plate |
| CN106057120A (en) * | 2016-08-15 | 2016-10-26 | 深圳市华星光电技术有限公司 | Display color transition method |
| WO2018113248A1 (en) * | 2016-12-20 | 2018-06-28 | 惠科股份有限公司 | Display device and method for driving display panel thereof |
| CN109768180A (en) * | 2018-12-20 | 2019-05-17 | 华映科技（集团）股份有限公司 | Oled substrate, the production method of oled substrate and flexible display apparatus |
| CN110265463A (en) * | 2019-06-27 | 2019-09-20 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN110277059A (en) * | 2019-07-01 | 2019-09-24 | 武汉天马微电子有限公司 | Driving chip and its control method, display device |
| CN110767726A (en) * | 2019-10-29 | 2020-02-07 | 昆山国显光电有限公司 | Method for improving color cast, display panel and display device |
| CN111969016A (en) * | 2020-08-20 | 2020-11-20 | 合肥维信诺科技有限公司 | Pixel arrangement structure, display device and color cast compensation method |
| US20210082333A1 (en) * | 2019-01-24 | 2021-03-18 | Boe Technology Group Co., Ltd. | Display panel and driving method thereof and display device |
| KR20210087873A (en) * | 2020-01-03 | 2021-07-13 | 삼성전자주식회사 | Display module |
| CN114300525A (en) * | 2021-12-31 | 2022-04-08 | 北京维信诺科技有限公司 | Display substrate and display panel |
-
2022
- 2022-05-16 CN CN202210530704.4A patent/CN115171547B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005071702A (en) * | 2003-08-21 | 2005-03-17 | Advanced Display Inc | Planar light source device and display device having device |
| US20150311269A1 (en) * | 2014-04-23 | 2015-10-29 | Innolux Corporation | Display substrate and display device applying the same |
| CN105280139A (en) * | 2015-11-11 | 2016-01-27 | 深圳市华星光电技术有限公司 | AMOLED brightness compensation method and AMOLED driving system |
| CN105785685A (en) * | 2016-05-11 | 2016-07-20 | 深圳市华星光电技术有限公司 | Double-side display, display module and TFT (Thin Film Transistor) array base plate |
| CN106057120A (en) * | 2016-08-15 | 2016-10-26 | 深圳市华星光电技术有限公司 | Display color transition method |
| WO2018113248A1 (en) * | 2016-12-20 | 2018-06-28 | 惠科股份有限公司 | Display device and method for driving display panel thereof |
| CN109768180A (en) * | 2018-12-20 | 2019-05-17 | 华映科技（集团）股份有限公司 | Oled substrate, the production method of oled substrate and flexible display apparatus |
| US20210082333A1 (en) * | 2019-01-24 | 2021-03-18 | Boe Technology Group Co., Ltd. | Display panel and driving method thereof and display device |
| CN110265463A (en) * | 2019-06-27 | 2019-09-20 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN110277059A (en) * | 2019-07-01 | 2019-09-24 | 武汉天马微电子有限公司 | Driving chip and its control method, display device |
| CN110767726A (en) * | 2019-10-29 | 2020-02-07 | 昆山国显光电有限公司 | Method for improving color cast, display panel and display device |
| KR20210087873A (en) * | 2020-01-03 | 2021-07-13 | 삼성전자주식회사 | Display module |
| CN111969016A (en) * | 2020-08-20 | 2020-11-20 | 合肥维信诺科技有限公司 | Pixel arrangement structure, display device and color cast compensation method |
| CN114300525A (en) * | 2021-12-31 | 2022-04-08 | 北京维信诺科技有限公司 | Display substrate and display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115171547B (en) | 2023-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11974465B2 (en) | Display substrate and display device | |
| CN105006480B (en) | Pixel array, electrooptical device and electrical equipment | |
| KR102124043B1 (en) | Pixel array structure and display device employing the same | |
| EP2983207B1 (en) | Organic electroluminescent array substrate, manufacturing method thereof and display device | |
| US20220045161A1 (en) | Transparent oled display panel, display apparatus and manufacturing method | |
| US20220208890A1 (en) | Display panel and display device | |
| CN105914222B (en) | Electro-optical device, electrical apparatus, and pixel rendering method | |
| EP2209105B1 (en) | Electronic display having improved uniformity | |
| US10170526B1 (en) | Organic light emitting diode display panel and method for manufacturing same | |
| US10608070B2 (en) | Organic EL display device | |
| US10128317B2 (en) | Method for eliminating electrical cross-talk in OLED microdisplays | |
| CN108878493B (en) | Display panel and display device | |
| US9184416B2 (en) | Organic electro luminescent display device | |
| US11778883B2 (en) | Display device, manufacture method, and electronic equipment | |
| US11798446B2 (en) | Display device and terminal device | |
| US20220006042A1 (en) | Display panel and manufacturing method thereof | |
| KR20110063227A (en) | Organic light emitting diode display device | |
| CN109119438B (en) | Display substrate, manufacturing method thereof and display device | |
| KR20120119299A (en) | Liquid crystal display device | |
| CN115171547B (en) | Display substrate, driving method thereof and display device | |
| KR102086473B1 (en) | Organic light emitting diode display device | |
| CN112083609A (en) | Display panel | |
| US20190326547A1 (en) | Organic el display panel | |
| WO2018207484A1 (en) | Display device and electronic apparatus | |
| US20240023400A1 (en) | Display panel and display module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |