CN113920907B - Display device and driving compensation method thereof - Google Patents
Display device and driving compensation method thereof Download PDFInfo
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- CN113920907B CN113920907B CN202111206910.1A CN202111206910A CN113920907B CN 113920907 B CN113920907 B CN 113920907B CN 202111206910 A CN202111206910 A CN 202111206910A CN 113920907 B CN113920907 B CN 113920907B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005452 bending Methods 0.000 claims abstract description 239
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- 238000005259 measurement Methods 0.000 claims description 4
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- 238000012544 monitoring process Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 23
- 238000001514 detection method Methods 0.000 description 17
- 230000007935 neutral effect Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
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Classifications
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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
- G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
- G09G3/035—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays for flexible display surfaces
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- 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
- G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The invention discloses a display device and a driving compensation method thereof, which relate to the technical field of display, wherein the display device comprises: a flexible display screen; the sensor is used for detecting bending information of the flexible display screen and generating a bending signal based on the bending information; the driving module is electrically connected with the sensor and is used for receiving the bending signal and compensating the driving signal based on the bending signal. The invention effectively relieves the situation that the flexible display screen in the prior art is uneven in display after being bent.
Description
Technical Field
The present invention relates to the field of display technologies, and more particularly, to a display device and a driving method thereof.
Background
Along with the development of technology, flexible display devices have become a new trend. Existing flexible display devices have at least one bending region along which the flexible display device can bend. In the flexible display device, the extrusion force of the flexible display screen in the bending area is different from the extrusion force of the flexible display screen in the non-bending area, so that the problem of uneven display is caused.
In the prior art, the influence of bending on display is reduced by correspondingly enhancing the laminated structure and the device characteristic in the flexible display screen. However, different flexible display designs have different requirements for devices, traces, laminate structures and materials, resulting in a solution that can only be adjusted for a certain product and that has limited effectiveness in improving the problem of non-uniformity of display.
Disclosure of Invention
In view of this, the present invention provides a display device and a driving method thereof, which effectively alleviate the situation that the flexible display screen in the prior art is uneven after being bent.
The present invention provides a display device including: a flexible display screen; the sensor is used for detecting bending information of the flexible display screen and generating a bending signal based on the bending information; the driving module is electrically connected with the sensor and is used for receiving the bending signal and compensating the driving signal based on the bending signal.
Based on the same thought, the invention also provides a driving compensation method of the display device, and the display device comprises: the flexible display screen, the sensor and the driving module are electrically connected with the sensor; the driving compensation method comprises the following steps: detecting bending information of the flexible display screen and generating a bending signal based on the bending information; the drive signal is compensated based on the bending signal.
Compared with the prior art, the display device and the driving method thereof provided by the invention have the advantages that at least the following effects are realized:
the display device provided by the invention comprises a flexible display screen, a sensor and a driving module. The sensor is used for detecting bending information of the flexible display screen and generating a bending signal based on the bending information of the flexible display screen. The driving module is electrically connected with the sensor and is used for receiving the bending signal transmitted by the sensor and compensating the driving signal based on the bending signal. The driving module can adjust driving signals transmitted to the flexible display screen in real time according to bending information of the flexible display screen, so that the display of the whole flexible display screen is more uniform.
Of course, it is not necessary for any one product to practice the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a display device in a curved state;
FIG. 2 is a schematic plan view of another display device according to the present invention in a flattened state;
FIG. 3 is a schematic plan view of yet another display device according to the present invention in a flattened state;
FIG. 4 is an enlarged schematic view of a portion B of the display device shown in FIG. 3;
FIG. 5 is a schematic plan view of yet another display device according to the present invention in a flattened state;
FIG. 6 is a schematic plan view of yet another display device according to the present invention in a flattened state;
FIG. 7 is an enlarged schematic view of a portion C of the display device shown in FIG. 6;
fig. 8 is a schematic view of a structure of still another display device according to the present invention in a bent state;
fig. 9 is a schematic view of a structure of still another display device according to the present invention in a bent state;
fig. 10 is a schematic view of a structure of still another display device according to the present invention in a bent state;
FIG. 11 is a schematic plan view of yet another display device according to the present invention in a flattened state;
FIG. 12 is a schematic plan view of yet another display device provided by the present invention in a flattened state;
FIG. 13 is a schematic plan view of yet another display device provided by the present invention in a flattened state;
fig. 14 is a flowchart of a driving compensation method of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 is a schematic structural diagram of a display device in a bending state according to the present invention, and referring to fig. 1, this embodiment provides a display device, which can be applied to electronic devices such as a mobile phone, a computer, and an electronic paper. The display device includes a flexible display 10 for display, the flexible display 10 includes a flexible substrate, and a light emitting unit and a driving circuit or the like that drive the light emitting unit are provided on the flexible substrate, and the flexible display 10 can be bent.
The display device further comprises a sensor 20 and a drive module 30. The sensor 20 is used to detect bending information of the flexible display screen 10 and generate a bending signal based on the bending information of the flexible display screen 10. Optionally, the bending information of the flexible display screen 10 includes information of a bending position, a bending degree, etc. of the flexible display screen 10. The driving module 30 is electrically connected to the sensor 20, and the driving module 30 is configured to receive the bending signal transmitted by the sensor 20 and compensate the driving signal based on the bending signal. That is, the driving module 30 can adjust the driving signal transmitted to the flexible display screen 10 in real time according to the bending information of the flexible display screen 10, so that the display of the whole flexible display screen 10 is more uniform.
Fig. 2 is a schematic plan view of another display device provided in accordance with the present invention in a flattened state, and referring to fig. 2, in some alternative embodiments, the display device includes at least one bending zone Z, and a non-bending zone F adjacent to the bending zone Z. When the display device is in the flattened state, the portions of the flexible display screen 10 located in the bending region Z and the non-bending region F are both in a flattened state. When the display device is in a curved state, the portion of the flexible display screen 10 located in the curved region Z is in a curved state.
The number of the sensors 20 is plural, the sensors 20 are at least located in the bending zone Z, and the extending direction of the bending axis L of the flexible display screen 10 is a first direction X, and the sensors 20 are at least arranged along a second direction Y, wherein the first direction X intersects with the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y. The bending degrees of a plurality of positions in the portion of the flexible display screen 10 located in the bending zone Z can be detected by the plurality of sensors 20, respectively, so that the driving signals of the respective positions in the portion of the flexible display screen 10 located in the bending zone Z can be adjusted to make the display of the whole flexible display screen 10 more uniform.
It should be noted that, in fig. 2, the display device is exemplarily shown to include at least one bending zone Z, and in other embodiments of the present invention, the display device may further include two or more bending zones Z, where, by using a plurality of sensors 20, it is possible to detect whether a portion of the flexible display screen 10 located in each bending zone Z is in a bending state, so that a bending position of the flexible display screen 10 may be detected, so as to adjust a driving signal of the bending position of the flexible display screen 10, so that the display of the whole flexible display screen 10 is more uniform.
It should be noted that, in this embodiment, the display device is exemplarily shown to include the bending region Z and the non-bending region F adjacent to the bending region Z, and in other embodiments of the present invention, the display device may further include only one bending region, and not include the non-bending region, that is, any position in the flexible display screen in the display device may be bent.
Fig. 3 is a schematic plan view of a display device in a flattened state, fig. 4 is an enlarged schematic view of a portion B of the display device shown in fig. 3, and referring to fig. 3 and 4, in some alternative embodiments, the sensor 20 includes a first sensor 21 and a second sensor 22, the first sensor 21 is arranged along a second direction Y, the second sensor 22 is arranged along the second direction Y, the first sensor 21 and the second sensor 22 partially overlap in the first direction X, so that a gap between the first sensor 21 and two second sensors 22 adjacent thereto at least partially overlaps, and similarly, a gap between the second sensor 22 and two first sensors 21 adjacent thereto also at least partially overlaps, so that no sensor 20 is present in a region corresponding to the gap between the adjacent second sensors 22 in the bending region Z, and thus, a bending condition of the region cannot be monitored, and a driving signal of the region cannot be adjusted is avoided.
Optionally, the first sensor 21 and two second sensors 22 adjacent thereto overlap partially in the first direction X, so that, in the second direction Y, any position in the bending zone Z corresponds to a sensor 20, which is beneficial for adjusting the driving signal at each position in the bending zone Z.
It should be noted that, in the present invention, it is not limited that one sensor is only a first sensor or a second sensor, and the naming of the first sensor and the second sensor is only for convenience of describing the setting position of the sensor, and when one sensor is the first sensor, the other sensor is the second sensor in the two sensors overlapped along the first direction.
Fig. 5 is a schematic plan view of still another display device provided in the present invention in a flattened state, and referring to fig. 5, in some alternative embodiments, the sensor 20 includes a third sensor 23 and a fourth sensor 24 located in a bending zone Z, a size of the third sensor 23 is smaller than a size of the fourth sensor 24, and a detection accuracy of the third sensor 23 is greater than a detection accuracy of the fourth sensor 24. When the portion of the flexible display screen 10 located in the bending zone Z is bent, the larger the stress is to the region having a larger distance from the non-bending zone F, i.e., the region closer to the central zone in the bending zone Z is stressed, so that the influence thereof on the display is larger. The distance from the third sensor 23 to the non-bending area F is L1, the distance from the fourth sensor 24 to the non-bending area F is L2, and L1 is greater than L2, that is, the distance from the third sensor 23 to the non-bending area F is greater than the distance from the fourth sensor 24 to the non-bending area F, because the detection accuracy of the third sensor 23 is greater than the detection accuracy of the fourth sensor 24, the detection accuracy of the area with greater stress in the portion of the flexible display screen 10 located in the bending area Z is advantageously improved, so that the driving signals of each position in the portion of the flexible display screen 10 located in the bending area Z can be more accurately adjusted, and the display of the whole flexible display screen 10 is more uniform.
In the present invention, the distance from the third sensor 23 to the non-bending region F is greater than the distance from the fourth sensor 24 to the non-bending region F, which means that the distance from the third sensor 23 to the non-bending region F closest thereto is greater than the distance from the fourth sensor 24 to the non-bending region F.
The distance from the sensor 20 to the non-bending region F in the present invention refers to the shortest distance from the geometric center of the sensor 20 to the non-bending region F closest thereto.
Fig. 6 is a schematic plan view of still another display device according to the present invention in a flattened state, fig. 7 is an enlarged schematic view of a portion C of the display device shown in fig. 6, and referring to fig. 6 and 7, in some alternative embodiments, the display device includes a first position W1 and a second position W2, where the distance from the first position W1 to the non-bending region F is h1, the distance from the second position W2 to the non-bending region F is h2, and h1 is greater than h2, i.e., the distance from the first position W1 to the non-bending region F is greater than the distance from the second position W2 to the non-bending region F. When the portion of the flexible display screen 10 located in the bending zone Z is bent, the stress at a position having a larger distance from the non-bending zone F is larger, that is, the stress at a position closer to the center in the bending zone Z is larger, so that the influence thereof on the display is larger, and the stress at a position closer to the non-display zone NA in the bending zone Z is smaller, so that the influence thereof on the display is smaller. When the portion of the flexible display screen 10 located in the bending zone Z is bent, the stress at the first position W1 is greater than the stress at the second position W2 in the display device. The number of sensors 20 overlapping the first position W1 is greater than the number of sensors 20 overlapping the second position W2 in the first direction X, so that the detection accuracy of the first position W1 is improved by increasing the number of sensors 20 overlapping the first position W1 in the first direction X, which is advantageous for improving the detection accuracy of a region with larger stress in a portion of the flexible display screen 10 located in the bending region Z, so that the driving signals of the respective positions in the portion of the flexible display screen 10 located in the bending region Z are more accurately adjusted, and the display of the entire flexible display screen 10 is more uniform.
It should be noted that, in the present invention, the distance from the first position W1 to the non-bending region F is greater than the distance from the second position W2 to the non-bending region F, which means that the distance from the first position W1 to the non-bending region F closest thereto is greater than the distance from the second position W2 to the non-bending region F.
It will be appreciated that the number of sensors 20 overlapped at the first position W1 and the number of sensors 20 overlapped at the second position W2 in the first direction X are exemplarily shown in fig. 6 and 7 as 4, and the number of sensors 20 overlapped at the first position W1 and the number of sensors 20 overlapped at the second position W2 in the first direction X are not limited in the present invention, and it is only required that the number of sensors 20 overlapped at the first position W1 is greater than the number of sensors 20 overlapped at the second position W2 in the first direction X.
It should be noted that the exemplary arrangement of the present embodiment is that the number of the sensors 20 overlapped by the first position W1 is greater than the number of the sensors 20 overlapped by the second position W2 along the first direction X, so as to illustrate that the specific setting positions of the first position W1 and the second position W2 in the bending region Z are not limited by increasing the number of the sensors 20 arranged in the region of the flexible display 10 in which the stress is greater in the portion of the bending region Z, thereby being beneficial to improving the detection accuracy of the region of the flexible display 10 in which the stress is greater in the portion of the bending region Z.
With continued reference to fig. 6, in some alternative embodiments, as the portion of flexible display screen 10 located in bending zone Z flexes, the force applied to flexible display screen 10 decreases progressively in the direction along bending zone Z toward non-bending zone F, i.e., the closer to the center in bending zone Z, the greater the force applied, and thus the greater its impact on the display. The number of overlapping of the sensors 20 in the first direction X is K, where K gradually decreases in a direction along the bending region Z toward the non-bending region F, and K is a positive integer, so that the detection accuracy of the region closer to the center in the portion of the flexible display screen 10 located in the bending region Z is higher, which is advantageous for more accurate adjustment of the driving signals at the respective positions in the portion of the flexible display screen 10 located in the bending region Z, and more uniform display of the entire flexible display screen 10.
With continued reference to fig. 6, in some alternative embodiments, the sensor 20 includes a fifth sensor 25, with a portion of the fifth sensor 25 being located in the bending zone Z and another portion being located in the non-bending zone F, avoiding the presence of a portion of the area where the bending zone Z and the non-bending zone F intersect without the corresponding sensor 20 facilitates adjustment of the drive signal at the intersection of the bending zone Z and the non-bending zone F.
Fig. 8 is a schematic structural diagram of still another display device provided in the present invention in a curved state, referring to fig. 8, in some alternative embodiments, the display device includes at least one first curved region Z1 and at least one second curved region Z2, a portion of the flexible display screen 10 located in the first curved region Z1 is curved toward the light emitting surface A1, a portion of the flexible display screen 10 located in the second curved region Z2 is curved away from the light emitting surface A1, and a portion of the flexible display screen 10 located in the first curved region Z1 and a portion of the flexible display screen 10 located in the second curved region Z2 may be curved in opposite directions.
When the portion of the flexible display screen 10 located in the first bending zone Z1 is bent toward the light-emitting surface A1, in the first bending zone Z1, the film layer located on the side of the neutral plane N close to the light-emitting surface A1 receives a pressing force, and the film layer located on the side of the neutral plane N away from the light-emitting surface A1 receives a stretching force. The sensor 20 located in the first bending zone Z1 is located at a side of the flexible display screen 10 near the light-emitting surface A1, so that the sensor 20 located in the first bending zone Z1 receives a pressing force. When the portion of the flexible display screen 10 located in the second bending zone Z2 is bent in the direction away from the light-emitting surface A1, in the second bending zone Z2, the film layer located on the side of the neutral plane N close to the light-emitting surface A1 receives a tensile force, and the film layer located on the side of the neutral plane N away from the light-emitting surface A1 receives a compressive force. The sensor 20 located in the second bending zone Z2 is located at a side of the flexible display screen 10 facing away from the light emitting surface A1, so that the sensor 20 located in the second bending zone Z2 is also subjected to a pressing force, that is, the type of stress to which the sensor 20 located in the first bending zone Z1 is subjected is the same as the type of stress to which the sensor 20 located in the second bending zone Z2 is subjected, and when the flexible display screen 10 is bent, the types of stress to which the sensors 20 located in each zone are the same, that is, the sensors 20 located in each zone detect bending information of each position in the flexible display screen 10 based on the same type of stress, which is beneficial to more accurately adjusting driving signals of each position in a portion of the flexible display screen 10 located in the bending zone Z, so that the display of the whole flexible display screen 10 is more uniform.
Fig. 9 is a schematic structural diagram of still another display device provided in the present invention in a curved state, referring to fig. 9, in some alternative embodiments, the display device includes at least one first curved region Z1 and at least one second curved region Z2, a portion of the flexible display screen 10 located in the first curved region Z1 is curved toward the light emitting surface A1, a portion of the flexible display screen 10 located in the second curved region Z2 is curved away from the light emitting surface A1, and a portion of the flexible display screen 10 located in the first curved region Z1 and a portion of the flexible display screen 10 located in the second curved region Z2 may be curved in opposite directions.
When the portion of the flexible display screen 10 located in the first bending zone Z1 is bent toward the light-emitting surface A1, in the first bending zone Z1, the film layer located on the side of the neutral plane N close to the light-emitting surface A1 receives a pressing force, and the film layer located on the side of the neutral plane N away from the light-emitting surface A1 receives a stretching force. The sensor 20 located in the first bending zone Z1 is located on a side of the flexible display screen 10 facing away from the light emitting surface A1, so that the sensor 20 located in the first bending zone Z1 is subjected to a tensile force. When the portion of the flexible display screen 10 located in the second bending zone Z2 is bent in the direction away from the light-emitting surface A1, in the second bending zone Z2, the film layer located on the side of the neutral plane N close to the light-emitting surface A1 receives a tensile force, and the film layer located on the side of the neutral plane N away from the light-emitting surface A1 receives a compressive force. The sensor 20 located in the second bending zone Z2 is located on the side of the flexible display screen 10 near the light emitting surface A1, so that the sensor 20 located in the second bending zone Z2 is also subjected to tensile force, that is, the type of stress to which the sensor 20 located in the first bending zone Z1 is subjected is the same as the type of stress to which the sensor 20 located in the second bending zone Z2 is subjected, and when the flexible display screen 10 is bent, the types of stress to which the sensors 20 located in each zone are subjected are the same, that is, the sensors 20 located in each zone detect bending information of each position in the flexible display screen 10 based on the same type of stress, which is beneficial to more accurately adjusting driving signals of each position in the portion of the flexible display screen 10 located in the bending zone Z, so that the display of the whole flexible display screen 10 is more uniform.
It should be noted that, in this embodiment, the portion of the flexible display screen 10 located in the first bending area Z1 is shown to bend toward the light-emitting surface A1, and the portion of the flexible display screen 10 located in the second bending area Z2 is shown to bend away from the light-emitting surface A1, in other embodiments of the present invention, the portion of the flexible display screen 10 located in the first bending area Z1 may also bend away from the light-emitting surface A1, and the portion of the flexible display screen 10 located in the second bending area Z2 may bend toward the light-emitting surface A1, and accordingly, the arrangement manner of the sensor 20 located in the first bending area Z1 and the sensor 20 located in the second bending area Z2 may be set with reference to the above embodiment.
Fig. 10 is a schematic structural diagram of still another display device provided in the present invention in a bent state, referring to fig. 10, in some alternative embodiments, the flexible display screen 10 may be a curled screen, where the flexible display screen 10 is curled with a first direction X as an axis, and the sensors 20 are arranged at least along a second direction Y, where the first direction X intersects the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y. By arranging the plurality of sensors 20 along the second direction Y, the degree of bending of each position in the flexible display screen 10 can be detected, respectively, so as to adjust the driving signals of each position in the flexible display screen 10, and display of the whole flexible display screen 10 is more uniform.
Fig. 11 is a schematic plan view of still another display device provided in the present invention in a flattened state, and referring to fig. 11, in some alternative embodiments, the flexible display screen 10 includes a plurality of data lines D arranged along a first direction X, and the data lines D extend along a second direction Y, wherein the first direction X intersects the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y. The flexible display 10 further comprises a plurality of pixels (not shown in the figure), and the data lines D are used to supply data signals to the pixels.
The driving module 30 obtains a bending position and a bending degree of the flexible display screen 10 based on the bending signal, and the driving module 30 compensates the data signal of the corresponding data line D based on the bending position and the bending degree of the flexible display screen 10, so that the data signal provided to the pixel located at the bending position can be adjusted based on the bending degree, and the display of the whole flexible display screen 10 is more uniform.
It should be noted that, in this embodiment, the driving module 30 is exemplarily shown to compensate the data signals of the corresponding data lines D based on the bending position and the bending degree of the flexible display screen 10, and in other embodiments of the present invention, the driving module 30 may also compensate the signals of other signal lines based on the bending position and the bending degree of the flexible display screen 10, which is not described herein again.
With continued reference to fig. 11, in some alternative embodiments, the sensor 20 is a film pressure sensor, where a side of the film pressure sensor near the flexible display screen 10 and a side of the film pressure sensor away from the flexible display screen 10 are both provided with a film layer parallel to the flexible display screen 10, and when the flexible display screen 10 is bent, the film pressure sensor will generate corresponding bending deformation along with the bending degree of the flexible display screen 10, so that a component used for detecting inside the film pressure sensor will generate a change of a pressure value, and detection of bending information of the flexible display screen 10 can be realized according to the pressure value fed back by the film pressure sensor.
With continued reference to fig. 11, in some alternative embodiments, the flexible display screen 10 includes a display area AA for display and a non-display area NA surrounding the display area AA for setting devices such as circuitry, and the non-display area NA is not for display. The sensor 20 is located on the light emitting side of the flexible display screen 10, and the sensor 20 is located in the non-display area NA, so that the arrangement of the sensor 20 is prevented from affecting the display effect of the flexible display screen 10.
Fig. 12 is a schematic plan view of yet another display device provided in the present invention in a flattened state, and referring to fig. 12, in some alternative embodiments, the sensor 20 is located on a side of the flexible display screen 10 facing away from the light emitting side, so that the arrangement of the sensor 20 does not affect the display of the flexible display screen 10. Alternatively, the sensor 20 may be disposed within the display area AA, which is advantageous for implementing a narrow bezel.
Fig. 13 is a schematic plan view of still another display device provided in the present invention in a flattened state, referring to fig. 13, in some alternative embodiments, the flexible display screen 10 includes a plurality of touch units TP, and the plurality of touch units TP are arranged in an array along a first direction X and a second direction Y, where the first direction X intersects the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y.
When the flexible display screen 10 is bent, the touch unit TP is correspondingly bent and deformed along with the bending degree of the flexible display screen 10, so that the capacitance value of the touch unit TP is changed, that is, the capacitance value of the touch unit TP is different from the capacitance value of the touch unit TP when the flexible display screen 10 is not bent when the flexible display screen 10 is bent, and the touch unit TP can be multiplexed into the sensor 20, so that the bending information of the flexible display screen 10 is detected. And the touch control unit TP is multiplexed into the sensor 20, and the sensor is not required to be additionally arranged for detecting the bending information of the flexible display screen 10, so that the process is effectively reduced, the production cost is reduced, and the thickness of the display device is reduced.
It will be understood that, when the touch unit TP is used for touch detection, the touch unit TP located at a certain point or a certain local area may have a capacitance change, and when the touch unit TP is used for detecting bending information of the flexible display screen 10, the touch units TP arranged along the first direction X or the touch units TP arranged along the second direction Y may have a capacitance change, so that the detection signals of the two touch units TP are completely different, and the touch units TP may be multiplexed into the sensor 20.
With continued reference to fig. 11, in some alternative embodiments, the driver module 30 is a driver chip. Alternatively, the driving module 30 may use a dedicated driving chip, and then electrically connect the driving chip with the total driving chip of the flexible display screen to implement communication.
With continued reference to fig. 1, in some alternative embodiments, the drive module 30 may also be a motherboard that is also used to monitor the flex life of the flexible display 10 based on the flex signal. Specifically, the motherboard may detect the bending life of the flexible display screen 10 based on the information such as the bending degree and the bending time of the flexible display screen 10.
The present embodiment provides a driving compensation method of a display device, where, with continued reference to fig. 1, the display device includes a flexible display screen 10, a sensor 20, and a driving module 30, and the driving module 30 is electrically connected with the sensor 20.
Fig. 14 is a flowchart of a driving compensation method of a display device according to the present invention, and referring to fig. 14, the driving compensation method of the display device includes:
s1, detecting bending information of the flexible display screen, and generating a bending signal based on the bending information.
And S2, compensating the driving signal based on the bending signal.
Specifically, the sensor 20 is configured to detect bending information of the flexible display screen 10 and generate a bending signal based on the bending information of the flexible display screen 10. Optionally, the bending information of the flexible display screen 10 includes information of a bending position, a bending degree, etc. of the flexible display screen 10. The driving module 30 is electrically connected to the sensor 20, and the driving module 30 is configured to receive the bending signal transmitted by the sensor 20 and compensate the driving signal based on the bending signal. That is, the driving module 30 can adjust the driving signal transmitted to the flexible display screen 10 in real time according to the bending information of the flexible display screen 10, so that the display of the whole flexible display screen 10 is more uniform.
With continued reference to fig. 2, in some alternative embodiments, the sensor 20 is a film pressure sensor, where a side of the film pressure sensor near the flexible display screen 10 and a side of the film pressure sensor away from the flexible display screen 10 are both provided with a film layer parallel to the flexible display screen 10, and when the flexible display screen 10 is bent, the film pressure sensor will bend and deform correspondingly with the bending degree of the flexible display screen 10, so that a component used for detecting inside the film pressure sensor will generate a change in pressure value, the pressure value of the film pressure sensor changes with the change in the bending degree of the flexible display screen 10, and the detection of the bending information of the flexible display screen 10 can be realized according to the pressure value fed back by the film pressure sensor. Specifically, the pressure value of the thin film pressure sensor changes along with the change of the bending degree of the flexible display screen 10, and the compensation coefficient also changes along with the change of the bending degree of the flexible display screen 10, and the driving module 30 receives the pressure value of the thin film pressure sensor, obtains the bending degree of the flexible display screen 10, obtains the compensation coefficient, and compensates the driving signal based on the compensation coefficient. It should be noted that, the compensation coefficient may be a constant coefficient, and when the flexible display screen 10 has a problem that the device recovers slowly after bending when in use, the compensation coefficient may be set to a coefficient including integration and differentiation according to the characteristics of the flexible display screen 10, that is, the compensation coefficient may be adjusted according to the characteristics of the flexible display screen 10 and the driving mode of the driving module 30, which is not described herein in detail.
With continued reference to fig. 13, in some alternative embodiments, the flexible display screen 10 includes a plurality of touch units TP arranged in an array, the touch units TP being multiplexed into the sensor 20.
When the flexible display screen 10 is bent, the touch unit TP is correspondingly bent and deformed along with the bending degree of the flexible display screen 10, so that the capacitance value of the touch unit TP is changed, that is, the capacitance value of the touch unit TP when the flexible display screen 10 is bent is different from the capacitance value of the touch unit TP when the flexible display screen 10 is not bent. Before the touch unit TP performs bending detection, an initial feedback signal of the touch unit 10 is acquired when the flexible display screen 10 is not bent. When the touch unit TP performs bending detection, a real-time feedback signal of the touch unit 20 is obtained, the feedback signal of the touch unit 20 changes along with bending of the flexible display screen 10, when the real-time feedback signal and the initial feedback signal are different, bending information of the flexible display screen 10 can be obtained according to the difference between the real-time feedback signal and the initial feedback signal, and a corresponding compensation driving signal is output based on the bending information of the flexible display screen 10.
In some alternative embodiments, when the touch unit performs bending detection on the flexible display screen, the voltage value of the compensation driving signal is V, v=v1+kxv2, V1 is the voltage value of the initial driving signal, K is the adjustment coefficient, and V2 is the voltage value of the real-time feedback signal.
Before the touch control unit performs bending detection, and when the flexible display screen is not bent, gamma measurement is performed on the flexible display screen through the fixed point optical measuring instrument to obtain a first gamma curve, and when the flexible display screen is bent, gamma measurement is performed on the flexible display screen through the fixed point optical measuring instrument to obtain a second gamma curve, wherein the translation difference between the first gamma curve and the second gamma curve is an adjusting coefficient.
As can be seen from the above embodiments, the display device and the driving method thereof provided by the present invention at least achieve the following beneficial effects:
the display device provided by the invention comprises a flexible display screen, a sensor and a driving module. The sensor is used for detecting bending information of the flexible display screen and generating a bending signal based on the bending information of the flexible display screen. The driving module is electrically connected with the sensor and is used for receiving the bending signal transmitted by the sensor and compensating the driving signal based on the bending signal. The driving module can adjust driving signals transmitted to the flexible display screen in real time according to bending information of the flexible display screen, so that the display of the whole flexible display screen is more uniform.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (19)
1. A display device, comprising:
a flexible display screen;
the sensor is used for detecting bending information of the flexible display screen and generating a bending signal based on the bending information;
the driving module is electrically connected with the sensor and is used for receiving the bending signal and compensating the driving signal based on the bending signal;
the display device comprises at least one bending region, a non-bending region adjacent to the bending region, and the sensor is at least positioned in the bending region;
the sensor comprises a first sensor and a second sensor;
the sensor includes a third sensor and a fourth sensor located within the bending zone, the third sensor having a smaller size than the fourth sensor, the third sensor being located a greater distance from the non-bending zone than the fourth sensor.
2. The display device of claim 1, wherein the display device comprises a display device,
the extending direction of the bending shaft of the flexible display screen is a first direction, and the sensors are at least arranged along a second direction, wherein the first direction is intersected with the second direction.
3. The display device of claim 2, wherein the display device comprises a display device,
the first sensor and the second sensor partially overlap in the first direction.
4. A display device according to claim 3, wherein,
the display device includes a first position and a second position, a distance from the first position to the non-bending region is greater than a distance from the second position to the non-bending region, and the number of sensors overlapped by the first position is greater than the number of sensors overlapped by the second position along the first direction.
5. The display device of claim 4, wherein the display device comprises a display panel,
the number of sensor overlaps in the first direction is K, which decreases gradually in a direction along the bending region towards the non-bending region.
6. The display device of claim 2, wherein the display device comprises a display device,
the sensor includes a fifth sensor, with a portion of the fifth sensor being located in the bending region and the other portion being located in the non-bending region.
7. The display device of claim 2, wherein the display device comprises a display device,
the display device comprises at least one first bending area and at least one second bending area, wherein the part of the flexible display screen positioned in the first bending area is bent towards the direction of the light emitting surface, and the part of the flexible display screen positioned in the second bending area is bent away from the direction of the light emitting surface;
the sensor positioned in the first bending area is positioned at one side of the flexible display screen close to the light-emitting surface, and the sensor positioned in the second bending area is positioned at one side of the flexible display screen away from the light-emitting surface;
or the sensor located in the first bending area is located at one side of the flexible display screen, which is away from the light-emitting surface, and the sensor located in the second bending area is located at one side of the flexible display screen, which is close to the light-emitting surface.
8. The display device of claim 1, wherein the display device comprises a display device,
the flexible display screen is curled by taking a first direction as an axis, and the sensors are at least arranged along a second direction, wherein the first direction is intersected with the second direction.
9. The display device of claim 1, wherein the display device comprises a display device,
the flexible display screen comprises a plurality of data lines arranged along a first direction, wherein the data lines extend along a second direction, and the first direction and the second direction are intersected;
the driving module obtains the bending position and the bending degree of the flexible display screen based on the bending signal;
the driving module compensates the data signals of the corresponding data lines based on the bending position and the bending degree of the flexible display screen.
10. The display device of claim 1, wherein the display device comprises a display device,
the sensor is a film pressure sensor.
11. The display device of claim 10, wherein the display device comprises a display device,
the flexible display screen comprises a display area and a non-display area surrounding the display area, the sensor is positioned on the light emitting side of the flexible display screen, and the sensor is positioned in the non-display area.
12. The display device of claim 10, wherein the display device comprises a display device,
the sensor is located at one side of the flexible display screen, which is away from the light emitting side.
13. The display device of claim 2, wherein the display device comprises a display device,
the flexible display screen comprises a plurality of touch units which are arranged in an array along the first direction and the second direction, wherein the first direction is intersected with the second direction;
the touch control unit is multiplexed into the sensor.
14. The display device of claim 1, wherein the display device comprises a display device,
the driving module is a driving chip.
15. The display device of claim 1, wherein the display device comprises a display device,
the driving module is a main board, and the main board is also used for monitoring the bending life of the flexible display screen based on the bending signals.
16. A driving compensation method of a display device, the display device comprising: the flexible display screen, the sensor and the driving module are electrically connected with the sensor;
the display device comprises at least one bending region, a non-bending region adjacent to the bending region, and the sensor is at least positioned in the bending region;
the sensor comprises a first sensor and a second sensor;
the sensor includes a third sensor and a fourth sensor located within the bending zone, the third sensor having a smaller size than the fourth sensor, the third sensor being located a greater distance from the non-bending zone than the fourth sensor;
the driving compensation method includes:
detecting bending information of the flexible display screen and generating a bending signal based on the bending information;
and compensating the driving signal based on the bending signal.
17. The method for driving compensation of a display device according to claim 16, wherein,
the sensor is a film pressure sensor;
the pressure value of the film pressure sensor changes along with the change of the bending degree of the flexible display screen;
the compensation coefficient changes along with the change of the bending degree of the flexible display screen;
and receiving the pressure value of the film pressure sensor, obtaining the bending degree of the flexible display screen, obtaining the compensation coefficient, and compensating the driving signal based on the compensation coefficient.
18. The method for driving compensation of a display device according to claim 16, wherein,
the flexible display screen comprises a plurality of touch units which are arranged in an array, and the touch units are multiplexed into the sensor;
acquiring an initial feedback signal of the touch control unit when the flexible display screen is not bent;
acquiring a real-time feedback signal of the touch control unit;
and outputting a compensation driving signal when the real-time feedback signal and the initial feedback signal are different.
19. The method for driving compensation of a display device according to claim 18, wherein,
the voltage value of the compensation driving signal is V, V=V1+KxV2, V1 is the voltage value of the initial driving signal, K is an adjusting coefficient, and V2 is the voltage value of the real-time feedback signal;
when the flexible display screen is not bent, gamma measurement is carried out on the flexible display screen through a fixed-point optical measuring instrument, so that a first gamma curve is obtained;
when the flexible display screen is bent, gamma measurement is carried out on the flexible display screen through a fixed-point optical measuring instrument, so that a second gamma curve is obtained;
the translational difference between the first gamma curve and the second gamma curve is the adjustment coefficient.
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