CN110648641B - Driving circuit for display screen, display screen and display terminal - Google Patents
Driving circuit for display screen, display screen and display terminal Download PDFInfo
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- CN110648641B CN110648641B CN201910924948.9A CN201910924948A CN110648641B CN 110648641 B CN110648641 B CN 110648641B CN 201910924948 A CN201910924948 A CN 201910924948A CN 110648641 B CN110648641 B CN 110648641B
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- 238000005452 bending Methods 0.000 claims abstract description 156
- 239000010409 thin film Substances 0.000 claims abstract description 95
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- 229920005591 polysilicon Polymers 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
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- 229920001621 AMOLED Polymers 0.000 description 1
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- 238000004020 luminiscence type Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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
- G09G3/20—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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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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]
- G09G3/3216—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] using a passive matrix
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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]
- G09G3/3225—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] using an active matrix
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0684—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
- H01L29/0688—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions characterised by the particular shape of a junction between semiconductor regions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
Abstract
The invention discloses a drive circuit for a display screen, the display screen and a display terminal, wherein the display screen comprises a fixed bending area and a non-bending area, and the drive circuit comprises: the first pixel circuit is arranged in the non-bending area; the second pixel circuit is arranged in the fixed bending area; the first pixel circuit comprises a plurality of first thin film transistors, and channels of the first thin film transistors are arc-shaped; the second pixel circuit comprises a plurality of second thin film transistors, and channels of the second thin film transistors are non-arc-shaped. By implementing the invention, the thin film transistor in the fixed bending region is set as the second thin film transistor, so that the carrier mobility can be increased under the action of stress, the current of the fixed bending region is increased, the brightness is improved, and the influence of a visual dark region on the viewing effect is eliminated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving circuit for a display screen, the display screen and a display terminal.
Background
As the size of the display screen becomes larger, the space occupied by the conventional flat screen also becomes larger, and the occupied space can be reduced by using the curved screen. In addition, the curved screen can display a surround picture effect, providing a better display effect than a flat screen. Curved screens are therefore also becoming more widely used.
The existing curved screen generally comprises a non-bending area and a bending area, for the non-bending area, when a viewing distance is far (generally, a non-near-eye display terminal), a viewing angle for viewing can be ignored, but for the bending area, when the screen is viewed, the viewing angle cannot be ignored, light entering eyes from the bending area can be weakened, and a visual dark area can be formed for a user, so that a viewing effect is influenced.
Disclosure of Invention
In view of this, embodiments of the present invention provide a driving circuit for a display screen, a display screen and a display terminal, so as to solve the technical problem that a bent area on a curved screen in the prior art forms a visual dark area.
The technical scheme provided by the invention is as follows:
a first aspect of an embodiment of the present invention provides a driving circuit for a display screen, where the display screen includes a fixed bending region and a non-bending region, and the driving circuit includes: a first pixel circuit disposed in the non-bending region; a second pixel circuit disposed in the fixed bending region; the first pixel circuit comprises a plurality of first thin film transistors, and channels of the first thin film transistors are arc-shaped; the second pixel circuit comprises a plurality of second thin film transistors, and channels of the second thin film transistors are non-arc-shaped.
Optionally, the second thin film transistor is a linear thin film transistor or a grid-type thin film transistor, and a channel of the linear thin film transistor is linear; the channel of the grid type thin film transistor is of a broken line type.
Optionally, the bending direction of the fixed bending region faces the display surface of the display screen, and the channel of the linear thin film transistor of the second pixel circuit is parallel to the bending axis.
Optionally, the bending direction of the fixed bending region faces away from the display surface of the display screen, and the channel of the linear thin film transistor of the second pixel circuit is perpendicular to the bending axis.
Optionally, the bending direction of the fixed bending region faces the display surface of the display screen, and the length of the channel of the grid-type thin film transistor of the second pixel circuit parallel to the bending axis is greater than the length of the channel of the grid-type thin film transistor perpendicular to the bending axis.
Optionally, a bending direction of the fixed bending region faces away from a display surface of the display screen, and a channel length of the grid-type thin film transistor of the second pixel circuit parallel to a bending axis is smaller than a channel length of the grid-type thin film transistor perpendicular to the bending axis.
Optionally, the second pixel circuit further includes: the heavily doped polysilicon is connected among the second thin film transistors and comprises a connecting part connected with the second thin film transistors and a bending part used for connecting the connecting part, wherein when the bending direction of the fixed bending region faces the display surface of the display screen, the connecting part is arranged in parallel to the bending axis; when the bending direction of the fixed bending area is back to the display surface of the display screen, the connecting part is perpendicular to the bending shaft.
A second aspect of an embodiment of the present invention provides a display screen, including: a fixed bending region, a non-bending region and a driving circuit according to any one of the first aspect and the first aspect of the embodiments of the present invention.
Optionally, the fixed bending region or non-bending region comprises: a substrate on which the first pixel circuit and/or the second pixel circuit are disposed; and the first pixel circuit and/or the second pixel circuit drive the pixel unit to emit light.
A third aspect of an embodiment of the present invention provides a display terminal, including: an apparatus body having a device region; the display screen according to any one of the second aspect and the second aspect of the embodiments of the present invention is overlaid on the device body.
The technical scheme of the invention has the following advantages:
according to the driving circuit for the display screen, the display screen and the display terminal provided by the embodiment of the invention, the thin film transistor in the fixed bending region is set as the second thin film transistor, and the channel region of the first thin film transistor is the first thin film transistor, so that the stress of the fixed bending region of the display screen cannot influence the channel region of the first thin film transistor, and therefore, the second thin film transistor arranged in the fixed bending region can increase the carrier mobility under the action of the stress, so that the current of the fixed bending region is increased, the brightness is improved, and the influence of a visual dark region on the viewing effect is eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1A and FIG. 1B are schematic diagrams of the luminescence of a display panel in the prior art
FIG. 2 is a block diagram of a first TFT in the prior art;
FIG. 3 is a block diagram of a driving circuit for a display panel according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating carrier mobility versus stress variation according to an embodiment of the present invention;
FIG. 5A is a block diagram of a structure of a fixed bending region facing a display surface according to an embodiment of the present invention, and FIG. 5B is a block diagram of a structure of a fixed bending region facing away from a real surface according to an embodiment of the present invention;
FIG. 6 is a block diagram of a driving circuit for a display panel according to another embodiment of the present invention;
FIG. 7 is a block diagram of a driving circuit for a display panel according to another embodiment of the present invention;
FIG. 8 is a block diagram of a driving circuit for a display panel according to another embodiment of the present invention;
FIG. 9 is a block diagram of a driving circuit for a display panel according to another embodiment of the present invention;
FIG. 10A and FIG. 10B are block diagrams of a driving circuit for a display panel according to another embodiment of the present invention;
fig. 11 is a block diagram of a display terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As described in the background art, when a user views a display screen having a fixed bending region, as shown in fig. 1A, when a bending direction of the fixed bending region 102 is opposite to a display surface of the display screen, for the non-bending region 101, when a viewing distance is long (generally, a non-near-eye display terminal), a viewing angle may be ignored, for the fixed bending region 102, the viewing angle cannot be ignored, light entering the eye of the fixed bending region 102 is weakened, and a visual dark region is formed; as shown in fig. 1B, when the bending direction of the fixed bending region 102 is opposite to the display surface of the display screen, for the non-bending region 101, when the viewing distance is longer (generally, a non-near-to-eye display terminal), the viewing angle can be ignored, for the fixed bending region 102, the viewing angle cannot be ignored, the light entering the eye of the fixed bending region 102 is weakened, and a visual dark region is formed; the visual dark area created by the display with the fixed bending area 102 affects the viewing effect. In order to prevent the uneven brightness in the fixed bending region of the pixel circuit in the conventional bending panel, the first thin film transistor shown in fig. 2 is usually used in the fixed bending region, however, the dark region shown in fig. 1A and 1B may occur when the first thin film transistor is used in the fixed bending region.
Based on this, the embodiment of the present invention provides a driving circuit for a display panel, as shown in fig. 3, the display panel 10 includes a non-bending region 101 and a fixed bending region 102, and the driving circuit includes: a first pixel circuit 11, the first pixel circuit 11 being disposed in the non-bending region 101; a second pixel circuit 12, the second pixel circuit 12 being disposed in the fixed bending region 102; the first pixel circuit 11 includes a plurality of first thin film transistors 125, channels of the first thin film transistors are arc-shaped, that is, the first thin film transistors are first thin film transistors; the second pixel circuit 12 includes a plurality of second thin film transistors 121 and 123 whose channels are non-arc-shaped. Wherein, the channel region of the first thin film transistor is in a continuous arc shape; the shape of the channel region of the second thin film transistor is a line type or a zigzag type, i.e., the second thin film transistor may include a line type thin film transistor 121 whose channel region is a line type and a grid type thin film transistor 123 whose channel region is a combination of a line type.
According to the driving circuit for the display screen provided by the embodiment of the invention, the thin film transistor in the fixed bending region is set as the second thin film transistor, and the channel region of the first thin film transistor is the first thin film transistor, so that the stress of the fixed bending region of the display screen cannot influence the channel region of the first thin film transistor, and therefore, the second thin film transistor arranged in the fixed bending region can increase the carrier mobility under the action of the stress, so that the current of the fixed bending region is increased, the brightness is improved, and the influence of a visual dark region on the viewing effect is eliminated.
As an optional implementation manner of the embodiment of the present invention, the second thin film transistor disposed in the fixed bending region 102 may be a linear thin film transistor, or may be a grid-type thin film transistor. The channel region of the linear thin film transistor is linear, and the channel region of the grid type thin film transistor is broken line type, namely the combination of linear channels, so that the carrier mobility in the linear or grid type thin film transistor is increased under the action of stress, the equivalent resistance is reduced, and the brightness is improved.
Specifically, through multiple experimental verifications, the change of the carrier mobility of the linear thin film transistor when the linear thin film transistor is subjected to tensile stress or compressive stress in the direction vertical to the channel or in the direction parallel to the channel is obtained. As shown in fig. 4, the horizontal axis represents the stress yo (tensile stress indicated by the origin (0,0) to the right and compressive stress indicated by the origin (0,0) to the left) to which the line-type thin film transistor is subjected, and the vertical axis represents the change in carrier mobility of the line-type thin film transistor (increase indicated by the origin (0,0) to the upper and decrease indicated by the origin (0,0) to the lower), wherein the solid line represents the direction parallel to the channel length to which the line-type thin film transistor is subjected, and the dotted line represents the direction perpendicular to the channel length to which the line-type thin film transistor is subjected.
Alternatively, as shown in fig. 5A, the bending direction of the fixed bending region 102 may be toward the display surface 13 of the display screen 10, or as shown in fig. 5B, may be away from the display surface 13 of the display screen 10.
As shown in fig. 5A and fig. 6, when the bending direction of the fixed bending region 102 is toward the display surface 13 of the display panel 10, the channel of the linear thin film transistor 121 may be parallel to the bending axis 122, and at this time, the vertical channel length direction of the linear thin film transistor 121 is subjected to compressive stress, so as to be seen from the curve shown in fig. 3, the carrier mobility of the linear thin film transistor 121 is increased by the influence of the stress, thereby improving the brightness of the fixed bending region 102 of the display panel.
As shown in fig. 5B and fig. 7, when the bending direction of the fixed bending region 102 is opposite to the display surface 13 of the display panel 10, the channel of the linear thin film transistor 121 may be disposed perpendicular to the bending axis 122, and at this time, the parallel channel length direction of the linear thin film transistor 121 is subjected to tensile stress, so that it can be seen from the graph shown in fig. 3 that the carrier mobility of the linear thin film transistor 121 is increased by the influence of the stress, thereby improving the brightness of the fixed bending region 102 of the display panel.
Alternatively, the pixel circuit of the fixed bend region 102 may be provided as a grid-type thin film transistor. Specifically, as shown in fig. 8, when the bending direction of the fixed bending region 102 is directed toward the display surface 13 of the display screen 10, the lattice-type thin film transistor 123 may be disposed such that the channel length of the parallel bending axis is greater than the channel length of the perpendicular bending axis; at this time, if the channel of the grid-type thin film transistor 123 parallel to the bending axis is subjected to a compressive stress in the direction perpendicular to the channel length direction, as shown in fig. 4, the carrier mobility of the channel portion parallel to the bending axis is increased, and if the channel of the grid-type thin film transistor 123 perpendicular to the bending axis is subjected to a compressive stress in the direction parallel to the channel length direction, as shown in fig. 4, the carrier mobility of the channel portion perpendicular to the bending axis is decreased, so that in order to increase the carrier mobility, the grid-type thin film transistor 123 may be set such that the channel length parallel to the bending axis is longer than the channel length perpendicular to the bending axis, and the carrier mobility of the whole grid-type thin film transistor 123 may be increased, thereby improving the luminance of the fixed bending region of the display panel.
As shown in fig. 9, when the bending direction of the fixed bending region 102 is directed away from the display surface 13 of the display screen 10, the lattice-type thin film transistor 123 may be disposed such that the channel length of the parallel bending axis is smaller than the channel length of the perpendicular bending axis. At this time, when the channel of the grid-type thin film transistor 123 parallel to the bending axis is subjected to the tensile stress in the direction perpendicular to the channel length direction, as shown in fig. 4, the carrier mobility of the channel portion parallel to the bending axis is decreased, and when the channel of the grid-type thin film transistor 123 perpendicular to the bending axis is subjected to the tensile stress in the direction parallel to the channel length direction, as shown in fig. 4, the carrier mobility of the channel portion perpendicular to the bending axis is increased, so that in order to increase the carrier mobility, the grid-type thin film transistor 123 may be set such that the channel length parallel to the bending axis is smaller than the channel length perpendicular to the bending axis, and the carrier mobility of the whole grid-type thin film transistor 123 may be increased, thereby improving the luminance of the display panel fixed bending region.
As an optional implementation manner of the embodiment of the present invention, the driving circuit for a display screen further includes: and the second thin film transistors are connected through the heavily doped polysilicon. Wherein the heavily doped polysilicon may also be referred to as P-Si traces or P-Si lines.
Optionally, the heavily doped polysilicon includes a connection portion connected to the plurality of second thin film transistors, and a bending portion for connecting the connection portion, wherein when a bending direction of the fixed bending region faces a display surface of the display screen, the connection portion is parallel to the bending axis; when the bending direction of the fixed bending area is back to the display surface of the display screen, the connecting part is perpendicular to the bending shaft.
Specifically, as shown in fig. 5A and 10A, the heavily doped polysilicon 124 includes a connection portion connected to the plurality of second thin film transistors, and a bending portion for connecting the connection portion, wherein the connection portion is disposed parallel to the bending axis when the bending direction of the fixed bending region is toward the display surface of the display screen, or the connection portion has a portion parallel to the bending axis and a portion perpendicular to the bending axis, wherein the length parallel to the bending axis is greater than the length perpendicular to the bending axis; as shown in fig. 5B and 10B, when the bending direction of the fixed bending region faces away from the display surface of the display screen, the connection part is disposed perpendicular to the bending axis, or the connection part has a portion parallel to the bending axis and a portion perpendicular to the bending axis, wherein the length parallel to the bending axis is smaller than the length perpendicular to the bending axis.
According to the driving circuit for the display screen, provided by the embodiment of the invention, the connecting parts of the heavily doped polysilicon are arranged according to the bending direction of the fixed bending area, so that the influence of stress can be further increased, the carrier mobility is increased, the brightness of the display screen is improved, and the influence of a visual dark area is reduced.
An embodiment of the present invention further provides a display screen, where the display screen includes: a fixed bending region, a non-bending region and a driving circuit as described in any of the above embodiments.
Optionally, the display screen further comprises: a substrate on which the first pixel circuit and/or the second pixel circuit are disposed; the first pixel circuit and/or the second pixel circuit drive the pixel unit to emit light. The display screen may be any one of an LCD display screen, a PMOLED display screen, or an AMOLED display screen, which is not limited in the present invention.
An embodiment of the present invention further provides a display terminal, where the display terminal includes: an apparatus body having a device region; the display screen of any one of the above embodiments is overlaid on the device body. The display terminal can be a product or a component with a display function, such as a mobile phone, a flat panel, a television, a display, a palm computer, an ipod, a digital camera, a navigator and the like.
Fig. 11 is a schematic structural diagram of a display terminal in an embodiment, where the display terminal includes an apparatus body 810 and a display screen 820. The display 820 is provided on the apparatus body 810 and is interconnected with the apparatus body 810. The display 820 may be the display in any of the above embodiments, and is used to display static or dynamic pictures.
Although the present invention has been described in detail with respect to the exemplary embodiments and the advantages thereof, those skilled in the art will appreciate that various changes, substitutions and alterations can be made to the embodiments without departing from the spirit and scope of the invention as defined by the appended claims. For other examples, one of ordinary skill in the art will readily appreciate that the order of the process steps may be varied while maintaining the scope of the present invention.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (9)
1. A driving circuit for a display screen, the display screen comprising a fixed bending region and a non-bending region, the driving circuit comprising:
a first pixel circuit disposed in the non-bending region;
a second pixel circuit disposed in the fixed bending region;
the first pixel circuit comprises a plurality of first thin film transistors, and channels of the first thin film transistors are arc-shaped;
the second pixel circuit comprises a plurality of second thin film transistors, and channels of the second thin film transistors are non-arc-shaped;
the second pixel circuit further includes: the heavily doped polysilicon is connected among the second thin film transistors and comprises a connecting part connected with the second thin film transistors and a bending part used for connecting the connecting part, wherein when the bending direction of the fixed bending region faces the display surface of the display screen, the connecting part is arranged in parallel to the bending axis; when the bending direction of the fixed bending area is back to the display surface of the display screen, the connecting part is perpendicular to the bending shaft.
2. The driving circuit for a display screen according to claim 1, wherein the second thin film transistor is a linear thin film transistor or a grid thin film transistor, and a channel of the linear thin film transistor is linear; the channel of the grid type thin film transistor is of a broken line type.
3. The driving circuit for a display panel according to claim 2, wherein the fixed bending region has a bending direction toward a display surface of the display panel, and channels of the line-type thin film transistors of the second pixel circuits are arranged parallel to a bending axis.
4. The driving circuit for a display panel according to claim 2, wherein a bending direction of the fixed bending region faces away from a display surface of the display panel, and channels of the line-type thin film transistors of the second pixel circuits are arranged perpendicular to a bending axis.
5. The driving circuit for a display panel according to claim 2, wherein a bending direction of the fixed bending region is toward a display surface of the display panel, and a channel length of the grid-type thin film transistor of the second pixel circuit in parallel with a bending axis is longer than a channel length of the grid-type thin film transistor in perpendicular to the bending axis.
6. The driving circuit for a display panel according to claim 2, wherein a bending direction of the fixed bending region faces away from a display surface of the display panel, and a channel length of the grid-type thin film transistor of the second pixel circuit parallel to a bending axis is smaller than a channel length of the second pixel circuit perpendicular to the bending axis.
7. A display screen, comprising: a fixed bending region, a non-bending region and a driving circuit according to any one of claims 1 to 6.
8. The display screen of claim 7, wherein the fixed bend region or non-bend region comprises:
a substrate on which the first pixel circuit and/or the second pixel circuit are disposed;
and the first pixel circuit and/or the second pixel circuit drive the pixel unit to emit light.
9. A display terminal, comprising:
an apparatus body having a device region;
a display screen as claimed in claim 7 or 8, overlaid on the device body.
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| CN113744675B (en) * | 2020-05-29 | 2024-01-30 | 北京小米移动软件有限公司 | Display effect adjusting method and device of display screen, electronic equipment and medium |
| CN114388559A (en) * | 2020-10-20 | 2022-04-22 | 华为技术有限公司 | Display panel, manufacturing method of display panel and electronic equipment |
| CN112420793A (en) * | 2020-11-18 | 2021-02-26 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN115064102A (en) * | 2021-11-30 | 2022-09-16 | 深圳荣耀智能机器有限公司 | Display screen, electronic equipment and manufacturing method of display screen |
| CN114265524B (en) * | 2021-12-17 | 2023-08-22 | 武汉华星光电半导体显示技术有限公司 | Display panel |
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| JP4104800B2 (en) * | 1999-12-08 | 2008-06-18 | 三菱電機株式会社 | Liquid crystal display device and TFT panel |
| KR100698692B1 (en) * | 2005-07-20 | 2007-03-23 | 삼성에스디아이 주식회사 | A Flat Panel Display |
| JP4984316B2 (en) * | 2005-08-18 | 2012-07-25 | セイコーエプソン株式会社 | Semiconductor device, electro-optical device and electronic apparatus |
| CN202282354U (en) * | 2011-04-21 | 2012-06-20 | 京东方科技集团股份有限公司 | Thin film transistor and display device |
| CN103325688A (en) * | 2013-06-17 | 2013-09-25 | 深圳市华星光电技术有限公司 | Method for forming channel of thin film transistor and compensating circuit |
| JP6012694B2 (en) * | 2014-11-24 | 2016-10-25 | 株式会社半導体エネルギー研究所 | Method for manufacturing light emitting device |
| CN106129120A (en) * | 2016-07-20 | 2016-11-16 | 京东方科技集团股份有限公司 | A kind of thin film transistor (TFT), pixel cell and array base palte, display device |
| CN108962980B (en) * | 2018-06-29 | 2021-07-09 | 云谷（固安）科技有限公司 | Flexible panel and device with display panel |
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