CN111179832A - Driving method of organic light-emitting display panel, time sequence controller and display device - Google Patents
Driving method of organic light-emitting display panel, time sequence controller and display device Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G2320/00—Control of display operating conditions
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Abstract
The invention discloses a driving method, a time sequence controller and a display device of an organic light-emitting display panel, which control a full-screen brightness gain value by analyzing and processing aging data of the organic light-emitting display panel, namely realize the maximum reduction of full-screen brightness according to the aging degree, thereby reducing the aging speed of the organic light-emitting display panel, prolonging the service life of the organic light-emitting display panel, stabilizing the power consumption of the organic light-emitting display panel, meeting the high-quality requirement of customers and enabling the product to have higher competitiveness.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving method, a time sequence controller and a display device of an organic light-emitting display panel.
Background
Today, human beings have not only harsh demands on the appearance and quality of products, but also have higher concerns about the price and practicality of products. In the field of display, especially Organic Light Emitting Display (OLED), the organic light emitting display has been widely accepted due to its excellent functions of wide color gamut, wide viewing angle, thinness, lightness, low power consumption, high contrast, and flexibility, and is gradually becoming the development direction of future display technologies.
In the field of large-size OLED TV, the OLED light-emitting device is easy to have efficiency attenuation phenomenon along with the prolonging of the use (light-emitting) time, thereby easily causing the phenomenon of picture quality reduction. To solve this problem, an external compensation method is generally adopted, and specifically, the change amount of the efficiency attenuation of the OLED light emitting device is estimated by sensing the change of the cross voltage of the OLED light emitting device. As shown in fig. 1, the aging compensation curve of the OLED light emitting device in the above OLED light emitting device efficiency compensation manner compensates to a constant target luminance (i.e., initial luminance) curve each time, so that the current increases once per compensation, thereby accelerating the aging of the OLED light emitting device, and the increase of the current easily causes the increase of the full screen power consumption. In summary, the conventional compensation method for the OLED light emitting device is easy to accelerate the aging of the OLED light emitting device, and is easy to increase the full screen power consumption.
Disclosure of Invention
In view of the foregoing, embodiments of the present invention provide a driving method, a timing controller and a display device for an organic light emitting display panel, so as to prolong the lifetime of the organic light emitting display panel and stabilize the power consumption of the organic light emitting display panel.
Therefore, an embodiment of the present invention provides a method for driving an organic light emitting display panel, including:
acquiring real-time lighting voltage of each sub-pixel, and determining first aging efficiency of each sub-pixel according to pre-stored initial lighting voltage of each sub-pixel and an aging model representing the relationship between voltage change and aging efficiency;
determining a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel;
determining a brightness gain value of the organic light-emitting display panel according to the second aging efficiency;
determining the target brightness of each sub-pixel according to the brightness gain value, wherein the target brightness is less than or equal to the initial brightness;
and when the organic light-emitting display panel displays an image, controlling each sub-pixel to display at the target brightness.
In a possible implementation manner, in the foregoing driving method provided by the embodiment of the present invention, the determining a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each of the sub-pixels specifically includes:
determining an overall aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel; or, the organic light emitting display panel is divided into a plurality of sub-display regions in advance, and the aging efficiency corresponding to each sub-display region on the organic light emitting display panel is determined according to the first aging efficiency of each sub-pixel.
In a possible implementation manner, in the foregoing driving method provided by the embodiment of the present invention, after determining the second aging efficiency of the organic light emitting display panel, and before determining the luminance gain value of the organic light emitting display panel according to the second aging efficiency, the method further includes:
judging whether the second aging efficiency is smaller than an aging efficiency threshold value or not, and if so, sending an instruction whether to reduce the brightness of the organic light-emitting display panel to a user; and if not, acquiring the latest first aging efficiency, and acquiring the latest second aging efficiency according to the latest first aging efficiency until the latest second aging efficiency is smaller than the aging efficiency threshold.
In a possible implementation manner, in the above driving method provided by the embodiment of the present invention, while determining the luminance gain value of the organic light emitting display panel according to the second aging efficiency, the method further includes:
when a 'yes' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a first brightness control curve stored in advance; the first luminance control curve satisfies the following relation:
when a 'no' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a pre-stored second brightness control curve, wherein the second brightness control curve meets the following relational expression that LUT (η) is 1 and (η is more than or equal to 0 and less than or equal to 1);
wherein LUT (η) represents the luminance gain value, and η represents the second aging efficiency.
In a possible implementation manner, in the foregoing driving method provided by the embodiment of the present invention, after determining the luminance gain value of the organic light emitting display panel and before determining the target luminance of each of the sub-pixels, the method further includes:
updating the aging efficiency threshold, wherein the updated aging efficiency threshold is smaller than the aging efficiency threshold before updating.
In a possible implementation manner, in the foregoing driving method provided in an embodiment of the present invention, while determining a luminance gain value of the organic light emitting display panel according to the second aging efficiency, the method further includes:
determining a brightness gain value of the organic light emitting display panel according to the first brightness control curve stored in advance; the first luminance control curve satisfies the following relation:
In a possible implementation manner, in the driving method provided in an embodiment of the present invention, determining the target luminance of each sub-pixel according to the luminance gain value specifically includes:
calculating the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, and η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of an mth row and an nth column.
In a possible implementation manner, in the foregoing driving method provided in an embodiment of the present invention, while determining a luminance gain value of the organic light emitting display panel, the method further includes:
determining color coordinates corresponding to different brightness according to pre-stored color coordinates corresponding to different brightness under different aging efficiencies and the first aging efficiency of each sub-pixel; and determining the complementary color gain value of each sub-pixel according to the determined color coordinates.
In a possible implementation manner, in the above driving method provided by the embodiment of the present invention, while determining the target luminance of each of the sub-pixels according to the luminance gain value, the method further includes:
and determining the target brightness of each sub-pixel according to the complementary color gain value.
In a possible implementation manner, in the driving method provided in an embodiment of the present invention, determining the target luminance of each sub-pixel according to the luminance gain value and the complementary color gain value specifically includes:
calculating the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)+L(m,n)×G(η(m,n),L(m,n))
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of the mth row and the nth column, and G (η (m, n), L (m, n)) denotes the complementary color gain values at η (m, n) and L (m, n) of the sub-pixel located at an intersection of the mth row and the nth column.
Based on the same inventive concept, an embodiment of the present invention provides a timing controller, including: the device comprises an efficiency calculation unit, a data analysis unit, a gain output unit, a brightness compensation unit and a data output unit; wherein the content of the first and second substances,
the efficiency calculation unit is configured to acquire a real-time lighting voltage of each sub-pixel, and determine a first aging efficiency of each sub-pixel according to a pre-stored initial lighting voltage of each sub-pixel and an aging model representing a relation between voltage change and aging efficiency;
the data analysis unit is configured to determine a second aging efficiency of the organic light-emitting display panel according to the first aging efficiency of each sub-pixel;
the gain output unit is configured to determine a brightness gain value of the organic light emitting display panel according to the second aging efficiency;
the brightness compensation unit is configured to determine a target brightness of each sub-pixel according to the brightness gain value, wherein the target brightness is smaller than or equal to an initial brightness;
the data output unit is configured to control each of the sub-pixels to display at the target brightness when the organic light emitting display panel displays an image.
In a possible implementation manner, in the above timing controller provided by the embodiment of the present invention, the data analysis unit is specifically configured to determine an overall aging efficiency of the organic light emitting display panel according to the first aging efficiency of each of the sub-pixels; or, the organic light emitting display panel is divided into a plurality of sub-display regions in advance, and the aging efficiency corresponding to each sub-display region on the organic light emitting display panel is determined according to the first aging efficiency of each sub-pixel.
In a possible implementation manner, in the timing controller provided in the embodiment of the present invention, the data analysis unit is further configured to determine whether the second aging efficiency is smaller than an aging efficiency threshold, and if so, send an instruction to a user whether to decrease the brightness of the organic light emitting display panel; and if not, acquiring the latest first aging efficiency, and acquiring the latest second aging efficiency according to the latest first aging efficiency until the latest second aging efficiency is smaller than the aging efficiency threshold.
In a possible implementation manner, in the above timing controller provided in the embodiment of the present invention, the gain output unit is further configured to determine a brightness gain value of the organic light emitting display panel according to a pre-stored first brightness control curve when a yes command fed back by a user is received; the first luminance control curve satisfies the following relation:
when a 'no' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a pre-stored second brightness control curve, wherein the second brightness control curve meets the following relational expression that LUT (η) is 1 and (η is more than or equal to 0 and less than or equal to 1);
wherein LUT (η) represents the luminance gain value, and η represents the second aging efficiency.
In a possible implementation manner, in the timing controller provided in the embodiment of the present invention, the data analysis unit is further configured to update the aging efficiency threshold, and the updated aging efficiency threshold is smaller than the aging efficiency threshold before updating.
In a possible implementation manner, in the above timing controller provided in the embodiment of the present invention, the gain output unit is further configured to determine a brightness gain value of the organic light emitting display panel according to the first brightness control curve stored in advance; the first luminance control curve satisfies the following relation:
In a possible implementation manner, in the above timing controller provided by the embodiment of the present invention, the luminance compensation unit is specifically configured to calculate the target luminance L of each of the sub-pixels according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, and η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of an mth row and an nth column.
In a possible implementation manner, in the timing controller provided in the embodiment of the present invention, the timing controller further includes: the complementary color calculation unit is configured to determine color coordinates corresponding to different brightness according to pre-stored color coordinates corresponding to different brightness under different aging efficiencies and the first aging efficiency of each sub-pixel; and determining the complementary color gain value of each sub-pixel according to the determined color coordinates.
In a possible implementation manner, in the above timing controller provided by the embodiment of the present invention, the luminance compensation unit is further configured to determine the target luminance of each of the sub-pixels according to the complementary color gain value.
In a possible implementation manner, in the above timing controller provided by the embodiment of the present invention, the luminance compensation unit is specifically configured to calculate the target luminance L of each of the sub-pixels according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)+L(m,n)×G(η(m,n),L(m,n))
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of the mth row and the nth column, and G (η (m, n), L (m, n)) denotes the complementary color gain values at η (m, n) and L (m, n) of the sub-pixel located at an intersection of the mth row and the nth column.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including: an organic light emitting display panel, a memory, a timing controller, a source driver and a gate driver; wherein the content of the first and second substances,
the time sequence controller comprises all units of the time sequence controller, a brightness conversion unit and a time sequence control unit;
the luminance conversion unit is configured to generate a luminance value corresponding to a gray-scale value according to the gray-scale value input from the outside;
the timing control unit is configured to generate a source control signal and a gate control signal according to an externally input timing control signal;
the memory is configured to store the initial lighting voltage of each sub-pixel, an aging model representing the relation between the voltage change and the aging efficiency, and color coordinates corresponding to different brightness under different aging efficiencies;
the source driver is configured to read a real-time lighting voltage of each sub-pixel, and generate a digital voltage signal according to the target brightness and the source control signal and output the digital voltage signal to the organic light emitting display panel;
the gate driver is configured to generate a scan voltage signal to output to the organic light emitting display panel according to the gate control signal;
the organic light emitting display panel is configured to perform screen display under the control of the digital voltage signal and the scan voltage signal.
The invention has the following beneficial effects:
the driving method, the time sequence controller and the display device of the organic light-emitting display panel provided by the embodiment of the invention comprise the following steps: acquiring real-time lighting voltage of each sub-pixel, and determining first aging efficiency of each sub-pixel according to pre-stored initial lighting voltage of each sub-pixel and an aging model representing the relationship between voltage change and aging efficiency; determining a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel; determining a brightness gain value of the organic light-emitting display panel according to the second aging efficiency; determining the target brightness of each sub-pixel according to the brightness gain value, wherein the target brightness is less than or equal to the initial brightness; when the organic light emitting display panel displays an image, each sub-pixel is controlled to display at a target brightness. The full-screen brightness gain value is controlled by analyzing and processing the aging data of the organic light-emitting display panel, and the full-screen brightness is reduced to the maximum extent, so that the aging speed of the organic light-emitting display panel is reduced, the service life of the organic light-emitting display panel is prolonged, the power consumption of the organic light-emitting display panel is stabilized, the high-quality requirements of customers are met, and the product is more competitive.
Drawings
FIG. 1 is a graph of aging compensation of a prior art OLED light emitting device;
fig. 2 is a flowchart illustrating a driving method of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 3 is an exemplary diagram of a high gray level image in the prior art;
fig. 4 is a first luminance control graph according to an embodiment of the present invention;
FIG. 5 is a three-dimensional histogram of full-screen luminance gain values provided by an embodiment of the present invention;
fig. 6 is a second flowchart of a driving method of an organic light emitting display panel according to an embodiment of the invention;
FIG. 7 is a second graph of brightness control according to an embodiment of the present invention;
FIG. 8 is a graph illustrating aging compensation of an OLED light emitting device according to an embodiment of the present invention;
fig. 9 is a third flowchart of a driving method of an organic light emitting display panel according to an embodiment of the invention;
fig. 10 is a fourth flowchart of a driving method of an organic light emitting display panel according to an embodiment of the invention;
fig. 11 is a schematic structural diagram of a timing controller according to an embodiment of the present invention;
fig. 12 is a second schematic structural diagram of a timing controller according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the invention;
fig. 14 is a second schematic structural diagram of a display device according to an embodiment of the invention;
fig. 15 is a schematic view of a pixel structure in a display device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "inner", "outer", "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 2, the method for driving an organic light emitting display panel according to an embodiment of the present invention may include the following steps:
s201, acquiring real-time lighting voltage V of each sub-pixelrealAccording to the pre-stored initial lighting voltage V of each sub-pixeliniAnd characterizing the voltage change Δ V (i.e., V)ini-Vreal) determining a first aging efficiency η (m, n) of each sub-pixel as LUT (delta V) according to an aging model related to aging efficiency, wherein (m, n) represents that the sub-pixel is positioned at the intersection position of the mth row and the nth column, and the LUT (delta V) represents a mapping function from delta V to η (m, n);
s202, determining a second aging efficiency η of the organic light-emitting display panel according to the first aging efficiency η (m, n) of each sub-pixel;
s203, determining a brightness gain value LUT (η) of the organic light-emitting display panel according to the second aging efficiency η;
s204, determining the target brightness L of each sub-pixel according to the brightness gain value LUT (η)1(m, n), target luminance L1(m, n) is less than or equal to the initial luminance Lini(ii) a Specifically, the aging degree of the OLED light-emitting device is small in the initial use period, and the display brightness does not need to be reduced, namely the target brightness L1(m, n) may be equal to the initial luminance Lini(ii) a After a period of use, the aging degree of the OLED light-emitting device becomes large, and the target brightness L is required to be ensured for prolonging the service life and reducing the power consumption1(m, n) is less than the initial luminance Lini；
S205, when the organic light-emitting display panel displays the image, controlling each sub-pixel to be at the target brightness L1(m, n) is shown.
In the driving method provided in the embodiment of the present invention, the full-screen brightness gain value is controlled by analyzing and processing the aging data of the organic light emitting display panel, that is, the full-screen brightness is reduced to the maximum extent according to the aging degree, so that the aging speed of the organic light emitting display panel is reduced, the service life of the organic light emitting display panel is prolonged, the power consumption of the organic light emitting display panel is stabilized, the high quality requirement of a customer is met, and the product is more competitive.
alternatively, in the above driving method provided by the embodiment of the present invention, the step S202 determines the second aging efficiency η of the organic light emitting display panel according to the first aging efficiency η (m, n) of each sub-pixel, which may be specifically implemented by:
the overall aging efficiency of the organic light emitting display panel is determined according to the first aging efficiency η (m, n) of each sub-pixel, that is, the overall aging efficiency of the organic light emitting display panel is taken as the second aging efficiency η.
in addition, for a large-sized organic light emitting display panel, because the aging accumulation effect of the full-screen display is different, the efficiency attenuation amplitude of the OLED light emitting device of the sub-pixels at different positions is different, as shown in fig. 3, the efficiency attenuation amplitude of the central area is larger than that of the peripheral area, therefore, in order to make the aging of the full screen tend to be uniform, step S202 determines the second aging efficiency η of the organic light emitting display panel according to the first aging efficiency η (m, n) of each sub-pixel, which can be specifically implemented in the following manner:
the method comprises the steps of dividing an organic light-emitting display panel into a plurality of sub-display areas (for example, the sub-display areas can be divided into M multiplied by N), and determining aging efficiency η (M, N) corresponding to each sub-display area on the organic light-emitting display panel according to first aging efficiency η (M, N) of each sub-pixel.
Alternatively, in the above driving method provided by the embodiment of the present invention, while the step S203 is performed to determine the luminance gain value of the organic light emitting display panel according to the second aging efficiency, the following steps may be further performed:
determining a brightness gain value of the organic light emitting display panel according to a first brightness control curve (shown in fig. 4) stored in advance; the first luminance control curve satisfies the following relation:
The first luminance control curve shown in fig. 4 relates to the maximum power consumption of the display panel, and the lower the maximum power consumption, the lower the overall luminance gain value at the same aging efficiency, for example, the overall efficiency of the display panel decreases by 25%, and the overall gain value is output to be 0.93.
specifically, under the condition of carrying out regional brightness control on the organic light-emitting display panel, a brightness gain value LUT (η) of the organic light-emitting display panel is determined according to a first brightness control curve and a second aging efficiency η, as shown in FIG. 5, the brightness gain value of the peripheral display region is large, and the brightness gain value of the central display region is small, as the brightness gain value is larger, the aging speed is correspondingly higher, and as the brightness gain value is smaller, the aging speed is correspondingly lower, therefore, the aging speed of the central region of the organic light-emitting display panel is smaller than that of the peripheral region, and the uniformity of full-screen aging is provided.
Alternatively, in the above-mentioned driving method provided by the embodiment of the present invention, as shown in fig. 6, after the step S202 is performed to determine the second aging efficiency of the organic light emitting display panel, and before the step S203 is performed to determine the luminance gain value of the organic light emitting display panel according to the second aging efficiency, the following steps may be further performed:
s601, judging whether the second aging efficiency is smaller than an aging efficiency threshold value or not, if so, indicating that the aging amplitude of the organic light-emitting display panel reaches a certain degree and the aging brightness compensation of the OLED light-emitting device needs to be implemented, sending an instruction of whether to reduce the brightness of the organic light-emitting display panel to a user, reminding the user of reducing the power consumption of the organic light-emitting display panel, prolonging the service life of the organic light-emitting display panel and whether to agree to properly reduce the brightness; if not, it indicates that the aging degree of the organic light emitting display panel is not high, step S201 and step S202 are repeatedly executed until the latest second aging efficiency is determined to be less than the aging efficiency threshold.
Alternatively, in the above driving method provided by the embodiment of the present invention, while the step S203 is performed to determine the luminance gain value of the organic light emitting display panel according to the second aging efficiency, the following steps may be further performed:
when a yes command fed back by a user is received, determining a brightness gain value of the organic light emitting display panel according to a first brightness control curve (shown in fig. 5) stored in advance; the first luminance control curve satisfies the following relation:
that is, upon receiving a yes command fed back by the user, step S2031 is performed to determine a luminance gain value of the organic light emitting display panel according to the second aging efficiency and the first luminance control curve;
when a 'no' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a pre-stored second brightness control curve (shown in figure 7), wherein the second brightness control curve satisfies the following relational expression that LUT (η) is 1 and (0 ≦ η ≦ 1);
that is, upon receiving the "no" command fed back by the user, step S2032 is performed to determine a luminance gain value of the organic light emitting display panel according to the second aging efficiency and the second luminance control curve;
where LUT (η) represents a luminance gain value and η represents the second aging efficiency.
Alternatively, in the above driving method provided by the embodiment of the present invention, after the step S203 is executed to determine the luminance gain value of the organic light emitting display panel, and before the step S204 is executed to determine the target luminance of each sub-pixel, the following steps may also be executed:
s604, updating the aging efficiency threshold, wherein the updated aging efficiency threshold is smaller than the aging efficiency threshold before updating. The reason for updating the aging efficiency threshold is that as the service life of the OLED light emitting device is prolonged, the aging degree of the OLED light emitting device is further increased, so that the judgment criterion for the aging of the device needs to be changed accordingly. Specifically, making the updated aging efficiency threshold smaller than the aging efficiency threshold before updating can ensure that multiple settings can be made throughout the aging cycle.
It should be noted that, after the sub-pixels are controlled to display at the target luminance in step S205, step S604 may be executed to update the aging efficiency threshold, and the updated aging efficiency threshold may be smaller than the aging efficiency threshold before updating. I.e. after one brightness adjustment is completed, the aging efficiency threshold is updated again.
Optionally, in the driving method provided in the embodiment of the present invention, in step S204, the target luminance of each sub-pixel is determined according to the luminance gain value, which may be specifically implemented in the following manner:
calculating the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)
where (m, n) denotes that the sub-pixel is located at the intersection of the mth row and the nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes a luminance gain value, and η (m, n) denotes a first aging efficiency of the sub-pixel located at the intersection of the mth row and the nth column.
For the conventional OLED compensation method, the target brightness L1in order to ensure the brightness is the same as the initial brightness, taking the first aging efficiency η (m, n) as 0.8 as an example, the brightness gain value output is 1/0.8-1.25, at which the current flowing through the OLED light-emitting device is increased by 1.25 times, and the aging of the OLED light-emitting device is accelerated.
specifically, the embodiment of the invention provides an aging compensation curve, as shown in fig. 8, it can be seen that, as the aging degree increases, we can appropriately reduce the maximum power consumption, and control the maximum power consumption compensated by the full screen based OLED light emitting device through the LUT (η), so as to effectively reduce the aging speed of the OLED light emitting device.
In the actual use process, as the use time is prolonged, the light emitting color of the OLED light emitting device of each sub-pixel has a certain deviation, and the color shift affects the display quality of the picture. Based on this, optionally, in the above driving method provided by the embodiment of the present invention, while the step S203 is performed to determine the luminance gain value of the organic light emitting display panel, the following steps may also be performed:
determining color coordinates corresponding to different brightness according to pre-stored color coordinates corresponding to different brightness under different aging efficiencies and the first aging efficiency of each sub-pixel; and determining the complementary color gain value of each sub-pixel according to the determined color coordinates.
Specifically, in the above driving method provided by the embodiment of the present invention, while the step S204 is executed to determine the target luminance of each sub-pixel according to the luminance gain value, the following steps may also be executed:
and determining the target brightness of each sub-pixel according to the complementary color gain value.
in the present invention, the luminance gain LUT (η) associated with the first aging efficiency η (m, n) is introduced to extend the life of the display panel, and at the same time, the phenomenon of picture quality degradation (e.g., color temperature degradation, afterimage occurrence) due to color shift can be compensated for by adding complementary color gain values corresponding to different luminance-corresponding color coordinates at different aging efficiencies.
Optionally, in the driving method provided in the embodiment of the present invention, determining the target luminance of each sub-pixel according to the luminance gain value and the complementary color gain value specifically includes:
calculating the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)+L(m,n)×G(η(m,n),L(m,n))
where (m, n) denotes that the sub-pixel is located at the intersection of the mth row and the nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes a luminance gain value, η (m, n) denotes a first aging efficiency of the sub-pixel located at the intersection of the mth row and the nth column, and G (η (m, n), L (m, n)) denotes complementary color gain values at η (m, n) and L (m, n) of the sub-pixel located at the intersection of the mth row and the nth column.
For the conventional OLED compensation method, the target brightness L1(m, n) ═ L (m, n) ÷ η (m, n), to ensure the same luminance as the initial luminance, take the first aging efficiency η (m, n) of 0.8 as an examplethe invention can properly reduce the full-screen brightness along with the aging of the OLED light-emitting device by introducing the factor of the brightness gain value LUT (η) related to the first aging efficiency η (m, n), thereby effectively improving the service life of the OLED light-emitting device, and simultaneously adding different complementary color gain values under different aging efficiencies can compensate the picture quality reduction phenomena (color temperature reduction, residual image occurrence and the like) caused by color cast, thereby improving the picture display quality.
Based on the same inventive concept, embodiments of the present invention provide a timing controller, and since the principle of solving the problem of the timing controller is similar to the principle of solving the problem of the driving method, the implementation of the timing controller provided by embodiments of the present invention may refer to the implementation of the driving method provided by embodiments of the present invention, and repeated details are omitted.
Specifically, an embodiment of the present invention provides a timing controller, as shown in fig. 11, including: an efficiency calculation unit 1101, a data analysis unit 1102, a gain output unit 1103, a luminance compensation unit 1104, and a data output unit 1105; wherein the content of the first and second substances,
an efficiency calculation unit 1101 configured to obtain a real-time lighting voltage of each sub-pixel, and determine a first aging efficiency of each sub-pixel according to a pre-stored initial lighting voltage of each sub-pixel and an aging model representing a relationship between voltage variation and aging efficiency;
a data analysis unit 1102 configured to determine a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel;
a gain output unit 1103 configured to determine a luminance gain value of the organic light emitting display panel according to the second aging efficiency;
a brightness compensation unit 1104 configured to determine a target brightness of each sub-pixel according to the brightness gain value, the target brightness being less than or equal to the initial brightness;
and a data output unit 1105 configured to control each sub-pixel to display at a target luminance when the organic light emitting display panel displays an image.
Optionally, in the foregoing timing controller provided in this embodiment of the present invention, the data analysis unit 1102 is specifically configured to determine an overall aging efficiency of the organic light emitting display panel according to the first aging efficiency of each of the sub-pixels; or, the organic light emitting display panel is divided into a plurality of sub-display regions in advance, and the aging efficiency corresponding to each sub-display region on the organic light emitting display panel is determined according to the first aging efficiency of each sub-pixel.
Optionally, in the foregoing timing controller provided in this embodiment of the present invention, the data analysis unit 1102 is further configured to determine whether the second aging efficiency is smaller than an aging efficiency threshold, and if so, send an instruction to a user whether to reduce the brightness of the organic light emitting display panel; and if not, acquiring the latest first aging efficiency, and acquiring the latest second aging efficiency according to the latest first aging efficiency until the latest second aging efficiency is smaller than the aging efficiency threshold.
Optionally, in the above timing controller provided in the embodiment of the present invention, the gain output unit 1103 is further configured to determine a brightness gain value of the organic light emitting display panel according to a pre-stored first brightness control curve when receiving a "yes" command fed back by a user; the first luminance control curve satisfies the following relation:
when a 'no' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a pre-stored second brightness control curve, wherein the second brightness control curve meets the following relational expression that LUT (η) is 1 and η is more than or equal to 0 and less than or equal to 1;
where LUT (η) represents a luminance gain value and η represents the second aging efficiency.
Optionally, in the timing controller provided in the embodiment of the present invention, the data analysis unit 1102 is further configured to update the aging efficiency threshold, where the updated aging efficiency threshold is smaller than the aging efficiency threshold before updating.
Optionally, in the above timing controller provided in the embodiment of the present invention, the gain output unit 1103 is further configured to determine a luminance gain value of the organic light emitting display panel according to a first luminance control curve stored in advance; the first luminance control curve satisfies the following relation:
Alternatively, in the above timing controller provided in the embodiment of the present invention, the brightness compensation unit 1104 is specifically configured to calculate the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)
where (m, n) denotes that the sub-pixel is located at the intersection of the mth row and the nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes a luminance gain value, and η (m, n) denotes a first aging efficiency of the sub-pixel located at the intersection of the mth row and the nth column.
Optionally, in the timing controller provided in the embodiment of the present invention, as shown in fig. 12, the timing controller further includes: a complementary color calculation unit 1106, configured to determine color coordinates corresponding to different luminances according to pre-stored color coordinates corresponding to different luminances under different aging efficiencies and the first aging efficiency of each sub-pixel; and determining the complementary color gain value of each sub-pixel according to the determined color coordinates.
Optionally, in the above timing controller provided in the embodiment of the present invention, the luminance compensation unit 1104 is further configured to determine the target luminance of each sub-pixel according to the complementary color gain value.
Alternatively, in the above timing controller provided in the embodiment of the present invention, the brightness compensation unit 1104 is specifically configured to calculate the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)+L(m,n)×G(η(m,n),L(m,n))
where (m, n) denotes that the sub-pixel is located at the intersection of the mth row and the nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes a luminance gain value, η (m, n) denotes a first aging efficiency of the sub-pixel located at the intersection of the mth row and the nth column, and G (η (m, n), L (m, n)) denotes complementary color gain values at η (m, n) and L (m, n) of the sub-pixel located at the intersection of the mth row and the nth column.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the above timing controller provided in the embodiment of the present invention, where the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, an intelligent watch, a fitness wrist strap, and a personal digital assistant. Other essential components of the display device should be understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present invention. In addition, because the principle of the display device to solve the problem is similar to that of the timing controller, the implementation of the display device can be referred to the embodiment of the timing controller, and repeated details are not repeated.
Specifically, a display device according to an embodiment of the present invention, as shown in fig. 13 and 14, includes: an organic light emitting display panel 001, a memory 002, a timing controller 003, a source driver 004, and a gate driver 005; wherein the content of the first and second substances,
a timing controller 003 including the units of the above-described timing controller, and a luminance conversion unit 1107 and a timing control unit 1108, as shown in fig. 11 and 12;
a luminance conversion unit 1107 configured to generate a luminance value L (m, n) corresponding to the gray-scale value RGB from the externally input gray-scale value RGB;
a Timing control unit 1108 configured to generate a source control signal SCS and a gate control signal GCS according to an externally input Timing control signal Timing;
a memory 002 configured to store the initial lighting voltage V of each sub-pixeliniAn aging model representing the relationship between the voltage change and the aging efficiency and color coordinates corresponding to different brightness under different aging efficiencies;
a source driver 004 configured to read a real-time lighting voltage V of each sub-pixelrealAnd generating a digital voltage signal according to the digital signal Data corresponding to the target brightness and the source control signal SCS, and outputting the digital voltage signal to the organic light emitting display panel 001 through the Data line DL;
a gate driver 005 configured to generate a scan voltage signal according to the gate control signal GCS to output the scan voltage signal to the organic light emitting display panel 001 through the gate line GL;
the organic light emitting display panel 001 is configured to perform screen display under the control of the digital voltage signal and the scan voltage signal.
It can be understood that fig. 13 is a schematic structural diagram of the display device capable of automatically reducing full-screen brightness according to the embodiment of the present invention, and is a display device with high intelligence. Fig. 14 is a schematic structural diagram of a display device that reduces full-screen brightness by user selection according to an embodiment of the present invention, which is a display device that can increase an interaction effect and focus on user experience. Similarly, the display devices shown in fig. 13 and 14 can reduce the full-screen brightness through the analysis of the aging data, so as to prolong the service life of the display device and stabilize the power consumption of the display device; and the brightness of the panel is controlled by the partitions, so that the aging degree area of the full screen is uniform.
Alternatively, the source driver 004 reads the real-time lighting voltage V of each sub-pixel through the sensing line SLreal. Of course, in specific implementations, the source driver 004 senses other optical/electrical characteristics of the sub-pixel, such as mobility μ and threshold voltage V of the transistor, through the sensing line SLth。
Exemplarily, in the embodiment of the present invention, as shown in fig. 15, a schematic diagram of a possible structure of a plurality of pixels included in the organic light emitting display panel 001 is shown. Specifically, each pixel is composed of a driving transistor T1, a switching transistor T2, a sensing transistor T3, and a storage capacitor Cst. Also, the gate electrode of the switching transistor T2 is electrically connected to the first gate line GL1, the first electrode of the switching transistor T2 is electrically connected to the data line DL, the second electrode of the switching transistor T2 is electrically connected to the gate electrode of the driving transistor T1, the first electrode of the driving transistor T1 is electrically connected to the high-level power source terminal ELVDD, the second electrode of the driving transistor T1 is electrically connected to the anode electrode of the OLED light emitting device, the gate electrode of the sensing transistor T3 is electrically connected to the second gate line GL2, the first electrode of the sensing transistor T3 is electrically connected to the sensing line SL, the second electrode of the sensing transistor T3 is electrically connected to the anode electrode of the OLED light emitting device, the storage capacitor Cst is connected between the gate electrode of the driving transistor T1 and the second electrode, and the cathode electrode of the OLED light.
It should be noted that the first and second poles of the driving transistor T1, the switching transistor T2 and the sensing transistor T3 in the above embodiments of the present invention are respectively a source and a drain, and the functions thereof can be interchanged according to the type of the transistors and the difference of the input signals, and are not specifically distinguished herein. Generally, when the transistors are all P-type transistors, the source is the input terminal and the drain is the output terminal; when the transistor is an N-type transistor, the drain is the input terminal and the source is the output terminal.
The driving method, the time sequence controller and the display device of the organic light-emitting display panel provided by the embodiment of the invention comprise the following steps: acquiring real-time lighting voltage of each sub-pixel, and determining first aging efficiency of each sub-pixel according to pre-stored initial lighting voltage of each sub-pixel and an aging model representing the relationship between voltage change and aging efficiency; determining a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel; determining a brightness gain value of the organic light-emitting display panel according to the second aging efficiency; determining the target brightness of each sub-pixel according to the brightness gain value, wherein the target brightness is less than or equal to the initial brightness; when the organic light emitting display panel displays an image, each sub-pixel is controlled to display at a target brightness. The full-screen brightness gain value is controlled by analyzing and processing the aging data of the organic light-emitting display panel, namely, the full-screen brightness is reduced to the maximum extent according to the aging degree, so that the aging speed of the organic light-emitting display panel is reduced, the service life of the organic light-emitting display panel is prolonged, the power consumption of the organic light-emitting display panel is stabilized, the high-quality requirements of customers are met, and the product is more competitive.
It should be noted that the various aspects of the driving method provided by the embodiment of the present invention can also be implemented in the form of a program product, which includes program code for causing a computer to perform the steps in the driving method according to the various exemplary embodiments of the present invention described above when the program product runs on the computer.
As will be appreciated by one skilled in the art, the method-of-driving embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the driver methods of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (21)
1. A method of driving an organic light emitting display panel, comprising:
acquiring real-time lighting voltage of each sub-pixel, and determining first aging efficiency of each sub-pixel according to pre-stored initial lighting voltage of each sub-pixel and an aging model representing the relationship between voltage change and aging efficiency;
determining a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel;
determining a brightness gain value of the organic light-emitting display panel according to the second aging efficiency;
determining the target brightness of each sub-pixel according to the brightness gain value, wherein the target brightness is less than or equal to the initial brightness;
and when the organic light-emitting display panel displays an image, controlling each sub-pixel to display at the target brightness.
2. The driving method according to claim 1, wherein the determining a second aging efficiency of the organic light emitting display panel according to the first aging efficiency of each of the sub-pixels specifically comprises:
determining an overall aging efficiency of the organic light emitting display panel according to the first aging efficiency of each sub-pixel; or, the organic light emitting display panel is divided into a plurality of sub-display regions in advance, and the aging efficiency corresponding to each sub-display region on the organic light emitting display panel is determined according to the first aging efficiency of each sub-pixel.
3. The driving method according to claim 1, further comprising, after determining a second aging efficiency of the organic light emitting display panel and before determining a luminance gain value of the organic light emitting display panel according to the second aging efficiency:
judging whether the second aging efficiency is smaller than an aging efficiency threshold value or not, and if so, sending an instruction whether to reduce the brightness of the organic light-emitting display panel to a user; and if not, acquiring the latest first aging efficiency, and acquiring the latest second aging efficiency according to the latest first aging efficiency until the latest second aging efficiency is smaller than the aging efficiency threshold.
4. The driving method according to claim 3, wherein determining the luminance gain value of the organic light emitting display panel according to the second aging efficiency further comprises:
when a 'yes' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a first brightness control curve stored in advance; the first luminance control curve satisfies the following relation:
when a 'no' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a pre-stored second brightness control curve, wherein the second brightness control curve meets the following relational expression that LUT (η) is 1 and (η is more than or equal to 0 and less than or equal to 1);
wherein LUT (η) represents the luminance gain value, and η represents the second aging efficiency.
5. The driving method of claim 3, after determining the luminance gain value of the organic light emitting display panel and before determining the target luminance of each of the sub-pixels, further comprising:
updating the aging efficiency threshold, wherein the updated aging efficiency threshold is smaller than the aging efficiency threshold before updating.
6. The driving method according to claim 1, wherein while determining the luminance gain value of the organic light emitting display panel according to the second aging efficiency, further comprising:
determining a brightness gain value of the organic light emitting display panel according to the first brightness control curve stored in advance; the first luminance control curve satisfies the following relation:
7. The driving method according to any one of claims 1 to 6, wherein determining the target luminance of each of the sub-pixels based on the luminance gain value specifically comprises:
according to the following formula,calculating a target luminance L of each of the sub-pixels1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, and η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of an mth row and an nth column.
8. The driving method according to any one of claims 1 to 6, further comprising, while determining a luminance gain value of the organic light emitting display panel:
determining color coordinates corresponding to different brightness according to pre-stored color coordinates corresponding to different brightness under different aging efficiencies and the first aging efficiency of each sub-pixel; and determining the complementary color gain value of each sub-pixel according to the determined color coordinates.
9. The driving method according to claim 8, further comprising, while determining the target luminance of each of the sub-pixels based on the luminance gain value:
and determining the target brightness of each sub-pixel according to the complementary color gain value.
10. The driving method according to claim 9, wherein determining the target luminance of each of the sub-pixels based on the luminance gain value and the complementary color gain value comprises:
calculating the target brightness L of each sub-pixel according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)+L(m,n)×G(η(m,n),L(m,n))
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of the mth row and the nth column, and G (η (m, n), L (m, n)) denotes the complementary color gain values at η (m, n) and L (m, n) of the sub-pixel located at an intersection of the mth row and the nth column.
11. A timing controller, comprising: the device comprises an efficiency calculation unit, a data analysis unit, a gain output unit, a brightness compensation unit and a data output unit; wherein the content of the first and second substances,
the efficiency calculation unit is configured to acquire a real-time lighting voltage of each sub-pixel, and determine a first aging efficiency of each sub-pixel according to a pre-stored initial lighting voltage of each sub-pixel and an aging model representing a relation between voltage change and aging efficiency;
the data analysis unit is configured to determine a second aging efficiency of the organic light-emitting display panel according to the first aging efficiency of each sub-pixel;
the gain output unit is configured to determine a brightness gain value of the organic light emitting display panel according to the second aging efficiency;
the brightness compensation unit is configured to determine a target brightness of each sub-pixel according to the brightness gain value, wherein the target brightness is smaller than or equal to an initial brightness;
the data output unit is configured to control each of the sub-pixels to display at the target brightness when the organic light emitting display panel displays an image.
12. The timing controller of claim 11, wherein the data analysis unit is specifically configured to determine an overall aging efficiency of the organic light emitting display panel according to the first aging efficiency of each of the sub-pixels; or, the organic light emitting display panel is divided into a plurality of sub-display regions in advance, and the aging efficiency corresponding to each sub-display region on the organic light emitting display panel is determined according to the first aging efficiency of each sub-pixel.
13. The timing controller of claim 11, wherein the data analysis unit is further configured to determine whether the second aging efficiency is less than an aging efficiency threshold, and if so, send an instruction to a user whether to reduce the brightness of the organic light emitting display panel; and if not, acquiring the latest first aging efficiency, and acquiring the latest second aging efficiency according to the latest first aging efficiency until the latest second aging efficiency is smaller than the aging efficiency threshold.
14. The timing controller of claim 13, wherein the gain output unit is further configured to determine a brightness gain value of the organic light emitting display panel according to a pre-stored first brightness control curve when a yes command fed back by a user is received; the first luminance control curve satisfies the following relation:
when a 'no' command fed back by a user is received, determining a brightness gain value of the organic light-emitting display panel according to a pre-stored second brightness control curve, wherein the second brightness control curve meets the following relational expression that LUT (η) is 1 and (η is more than or equal to 0 and less than or equal to 1);
wherein LUT (η) represents the luminance gain value, and η represents the second aging efficiency.
15. The timing controller of claim 13, wherein the data analysis unit is further configured to update the aging efficiency threshold, the updated aging efficiency threshold being less than the aging efficiency threshold before updating.
16. The timing controller of claim 11, wherein the gain output unit is further configured to determine a luminance gain value of the organic light emitting display panel according to the first luminance control curve stored in advance; the first luminance control curve satisfies the following relation:
17. The timing controller according to any one of claims 11-16, wherein the luminance compensation unit is specifically configured to calculate the target luminance L of each of the sub-pixels according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, and η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of an mth row and an nth column.
18. The timing controller of any one of claims 11-16, further comprising: the complementary color calculation unit is configured to determine color coordinates corresponding to different brightness according to pre-stored color coordinates corresponding to different brightness under different aging efficiencies and the first aging efficiency of each sub-pixel; and determining the complementary color gain value of each sub-pixel according to the determined color coordinates.
19. The timing controller of claim 18, wherein the brightness compensation unit is further configured to determine a target brightness of each of the sub-pixels according to the complementary color gain value.
20. The timing controller of claim 19, wherein the brightness compensation unit is specifically configured to calculate the target brightness L of each of the sub-pixels according to the following formula1(m,n)：
L1(m,n)＝L(m,n)×LUT(η)÷η(m,n)+L(m,n)×G(η(m,n),L(m,n))
where (m, n) denotes that the sub-pixel is located at an intersection of an mth row and an nth column, L (m, n) denotes a luminance value corresponding to an externally input gray-scale value, LUT (η) denotes the luminance gain value, η (m, n) denotes the first aging efficiency of the sub-pixel located at an intersection of the mth row and the nth column, and G (η (m, n), L (m, n)) denotes the complementary color gain values at η (m, n) and L (m, n) of the sub-pixel located at an intersection of the mth row and the nth column.
21. A display device, comprising: an organic light emitting display panel, a memory, a timing controller, a source driver and a gate driver; wherein the content of the first and second substances,
the timing controller, each unit including the timing controller according to any one of claims 11 to 20, and a luminance converting unit and a timing control unit;
the luminance conversion unit is configured to generate a luminance value corresponding to a gray-scale value according to the gray-scale value input from the outside;
the timing control unit is configured to generate a source control signal and a gate control signal according to an externally input timing control signal;
the memory is configured to store the initial lighting voltage of each sub-pixel, an aging model representing the relation between the voltage change and the aging efficiency, and color coordinates corresponding to different brightness under different aging efficiencies;
the source driver is configured to read a real-time lighting voltage of each sub-pixel, and generate a digital voltage signal according to the target brightness and the source control signal and output the digital voltage signal to the organic light emitting display panel;
the gate driver is configured to generate a scan voltage signal to output to the organic light emitting display panel according to the gate control signal;
the organic light emitting display panel is configured to perform screen display under the control of the digital voltage signal and the scan voltage signal.
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| CN103165079A (en) * | 2011-12-12 | 2013-06-19 | 乐金显示有限公司 | Organic light emitting display device and operation method thereof |
| CN104700773A (en) * | 2013-12-04 | 2015-06-10 | 乐金显示有限公司 | Organic light emitting display device and method for driving thereof |
| CN104809986A (en) * | 2015-05-15 | 2015-07-29 | 京东方科技集团股份有限公司 | Organic electroluminesence display panel and display device |
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