CN109192151B - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN109192151B CN109192151B CN201811442632.8A CN201811442632A CN109192151B CN 109192151 B CN109192151 B CN 109192151B CN 201811442632 A CN201811442632 A CN 201811442632A CN 109192151 B CN109192151 B CN 109192151B
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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
- G09G3/3406—Control of illumination source
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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
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display module and a display device. This display module assembly includes: display panel, backlight, display scanning circuit and backlight control circuit, wherein. The display panel comprises a pixel array, wherein the pixel array comprises P pixel partitions, and each pixel partition comprises a plurality of display pixels; the backlight source comprises a light emitting array, the light emitting array comprises P light emitting subareas, each light emitting subarea comprises a plurality of light emitting units, and the x-th light emitting subarea provides light sources for the x-th pixel subarea; the display scanning circuit is used for scanning the P pixel partitions in sequence; the backlight control circuit is used for lighting the light-emitting unit in the (y + 1) th light-emitting subarea when the display scanning circuit scans the (y) th pixel subarea, and lighting the light-emitting unit in the first light-emitting subarea when the display scanning circuit scans the (P) th pixel subarea. The display contrast can be improved and the smear problem can be reduced by the invention.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display module and a display device.
Background
The liquid crystal display device comprises a liquid crystal display panel and a backlight source, wherein electric fields between pixel electrodes and a common electrode in the liquid crystal display panel can enable liquid crystal molecules to deflect, light sources generated by a backlight component can penetrate through the liquid crystal display panel after the liquid crystal molecules deflect, the deflection degree of the liquid crystal molecules can be different by adjusting the size of the electric fields, the deflection degree of the liquid crystal molecules is different, the light transmittance of the liquid crystal display panel is different, the light quantity of the backlight source light-transmitting liquid crystal display panel is different, and therefore image display is achieved.
The backlight assembly can be divided into an edge-type backlight source and a direct-type backlight source according to different positions of light sources in the backlight assembly, the direct-type backlight source is also a surface light source and comprises a plurality of light emitting units, each light emitting unit comprises at least one point light source, and each light emitting unit can be independently controlled, so that local control of the direct-type backlight source is realized, and the control of the backlight source is more flexible relative to the side-light type backlight source. In the display control process, for the liquid crystal display panel, because the response time of liquid crystal deflection is slow, the smear is easy to see, and the quality of the display image of the display module is reduced.
Therefore, the technical problem to be solved in the field is urgently needed to provide a display module and a display device, and the quality of images displayed by the display module is improved while the local control of the direct type backlight source is realized.
Disclosure of Invention
In view of this, the present invention provides a display module and a display device, which can improve the display contrast and reduce the problem of smear, thereby improving the quality of the image displayed by the display module.
In one aspect, the invention provides a display module.
This display module assembly includes: display panel, backlight, display scanning circuit and backlight control circuit, wherein: the display panel comprises a pixel array, wherein the pixel array comprises P pixel partitions, each pixel partition comprises a plurality of display pixels, and P is an integer and is more than or equal to 2; the backlight source comprises a light emitting array, the light emitting array comprises P light emitting subareas, each light emitting subarea comprises a plurality of light emitting units, wherein the x-th light emitting subarea provides light sources for the x-th pixel subarea, and x is more than or equal to 1 and less than or equal to P; the display scanning circuit is used for scanning the P pixel partitions in sequence; the backlight control circuit is used for lighting the light-emitting unit in the y +1 th light-emitting partition when the display scanning circuit scans the y-th pixel partition, and lighting the light-emitting unit in the first light-emitting partition when the display scanning circuit scans the P-th pixel partition, wherein y is more than or equal to 1 and less than or equal to P-1.
In another aspect, the present invention provides a display device.
The display device comprises any one of the display modules provided by the invention.
Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:
the pixel array of the display panel and the light-emitting array of the backlight source are correspondingly divided into P subareas, the backlight control circuit independently lights one light-emitting subarea at any time, the local control of the backlight source can be realized, thereby the display contrast can be improved, simultaneously, the sequential control of the display scanning circuit and the backlight control circuit is realized, so that the display scanning circuit scans one pixel subarea in unit scanning time and needs to pass through P-1 unit scanning time, the backlight control circuit can control the corresponding light-emitting subareas to light, response time is provided for the deflection of liquid crystal molecules in the pixel subareas, therefore, the probability that people can see the smear can be reduced, and the quality of the display image of the display module is improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 diagram of a display panel in a display module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a backlight source in a display module according to an embodiment of the present invention;
FIG. 3 is a timing diagram illustrating a control process of the display module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a backlight source in a display module according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a display panel in a display module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a backlight source in a display module according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a backlight source in a display module according to another embodiment of the invention;
fig. 8 is a schematic structural diagram of a backlight source in a display module according to another embodiment of the invention;
FIG. 9 is a schematic diagram of a backlight source in a display module according to an embodiment of the invention;
fig. 10 is a schematic diagram of a display device according to an embodiment of the 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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a display panel in a display module according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a backlight in a display module according to an embodiment of the present invention, where in an embodiment, as shown in fig. 1 and fig. 2, the display module includes: a display panel 10, a backlight 20, a display scanning circuit 30, and a backlight control circuit 40.
The display panel 10 includes a pixel array PR, which includes P pixel partitions PA, i.e. a first pixel partition PA1, a second pixel partition PA2 to a P pixel partition PAP, where P is an integer greater than or equal to 2. Each pixel partition PA comprises a number of display pixels sp. For example, in fig. 1, the pixel array PR includes four pixel partitions PA, specifically, a first pixel partition PA1, a second pixel partition PA2, a third pixel partition PA3, and a fourth pixel partition PA 4. It should be noted that the number and arrangement of the display pixels sp in the pixel array PR and the division and arrangement of the pixel partitions PA in fig. 1 are only used to schematically illustrate the logical relationship between the display pixels sp and the pixel partitions PA, and do not limit the number and arrangement in the technical solution. The first to fourth pixel partitions PA may be sequentially arranged in a top-down manner as shown in fig. 1, or the first to fourth pixel partitions PA may also be sequentially arranged in a bottom-up manner, or the pixel partitions PA may also be divided in other manners, and different pixel partitions PA may include the same number of display pixels sp, or may include different numbers of display pixels sp.
Specifically, for the liquid crystal display panel, each display pixel sp includes a thin film transistor, a common electrode and a pixel electrode (none of which is shown in the figure), the thin film transistor includes a gate electrode, a source electrode and a drain electrode, wherein the drain electrode is electrically connected to the pixel electrode, the gate electrode is connected to a scanning line s, the source electrode is connected to a data line, when the scanning line s provides a scanning driving signal to the gate electrode, the source electrode and the drain electrode of the thin film transistor are connected, at this time, if the data line provides the data driving signal to the source electrode, the data driving signal passes through the source electrode to the drain electrode and then to the pixel electrode, so that an electric field is formed between the pixel electrode and the common electrode, liquid crystal molecules are deflected in the electric field, and light generated by the backlight source 20 can pass through the display pixel sp, thereby realizing the process that the display pixel displays a.
The display scanning circuit 30 is connected to the scanning line s, and is configured to provide a scanning driving signal to the display pixels sp via the scanning line s, so as to sequentially scan the P pixel partitions PA, specifically, as shown in fig. 2, sequentially scan the four pixel partitions PA in the order of the first pixel partition PA1, the second pixel partition PA2, the third pixel partition PA3, and the fourth pixel partition PA 4.
The backlight 20 comprises a light emitting array LR comprising P light emitting partitions LA, i.e. a first light emitting partition LA1, a second light emitting partition LA2 to a pth light emitting partition LAP, each light emitting partition LA comprising a number of light emitting units lu, wherein each light emitting partition LA comprises a number of light emitting units lu, which may be mini-LED lamps.
The number of the light emitting partitions LA is the same as the number of the pixel partitions PA, and the xth light emitting partition LAx supplies light to the xth pixel partition PAx, that is, the first light emitting partition LA1 supplies light to the first pixel partition PAx, the second light emitting partition LA2 supplies light to the second pixel partition PA2, and the … … pth light emitting partition LAP supplies light to the pth pixel partition PAP. The x-th light-emitting partition LAx provides light source for the x-th pixel partition PAx, and the orthographic projection of the x-th light-emitting partition LAx on the display panel 10 just coincides with the x-th pixel partition PAx in the position relation, wherein x is greater than or equal to 1 and less than or equal to P.
For example, in fig. 2, the light emitting array LR includes four light emitting partitions LA, specifically, a first light emitting partition LA1, a second light emitting partition LA2, a third light emitting partition LA3, and a fourth light emitting partition LA 4. Referring to fig. 1 and 2, the first light-emitting partition LA1 provides a light source to the first pixel partition PA1, the second light-emitting partition LA2 provides a light source to the second pixel partition PA2, the third light-emitting partition LA2 provides a light source to the second pixel partition PA2, and the fourth light-emitting partition LA4 provides a light source to the fourth pixel partition PA 4.
The backlight control circuit 40 is configured to light the light emitting units lu in the y +1 th light emitting partition LA when the y-th pixel partition PA is scanned by the display scanning circuit 30, light the light emitting units lu in the first light emitting partition LA1 when the P-th pixel partition PAP is scanned by the display scanning circuit 30, and only one light emitting partition LA is in a lighted state at any time, and when any one light emitting partition LA is lighted, the light emitting brightness of the light emitting partition LA may be set according to the brightness requirement of the corresponding image, thereby implementing local control of the backlight source, and being capable of improving the display contrast, where y is greater than or equal to 1 and less than or equal to P-1.
Fig. 3 is a control timing diagram of a display module according to an embodiment of the invention, please refer to fig. 1, fig. 2 and fig. 3 in combination, the display scanning circuit 30 sequentially scans four pixel partitions PA in the order of a first pixel partition PA1, a second pixel partition PA2, a third pixel partition PA3 and a fourth pixel partition PA4, and accordingly, the backlight control circuit 40 sequentially lights up four light-emitting partitions LA in the order of a second light-emitting partition LA2, a third light-emitting partition LA3, a fourth light-emitting partition LA4 and a first light-emitting partition LA1, thereby defining a unit scanning time for scanning each pixel partition PA as T ms, and a scanning period T includes 4T ms in total, and after the display scanning circuit 30 scans each pixel partition PA, it takes 2T ms to light up the corresponding light-emitting partition LA, for a liquid crystal display panel, response time can be provided for liquid crystal deflection, and probability that human eyes see the smear phenomenon is reduced. For example, for the first pixel partition PA1 and the first light-emitting partition LA1, after the display scanning circuit 30 scans the first pixel partition PA1, the corresponding first light-emitting partition LA1 is lit at an interval of 2t milliseconds.
In fig. 3, it is indicated that each pixel division is scanned by the display scanning circuit 30 only at a high level, and each light emitting division is lit at a high level.
Adopt the display module assembly that this embodiment provided, the pixel array of display panel and the luminous array of backlight correspond and divide into P subregion, the control circuit that is shaded lights a luminous subregion alone at arbitrary time, can realize the local control of backlight, thereby can promote the display contrast, simultaneously, time sequence control through display scanning circuit and control circuit that is shaded, make display scanning circuit scan a pixel subregion back in unit scanning time, need pass through P-1 unit scanning time, control circuit that is shaded just can control the luminous subregion that corresponds and light, the deflection of liquid crystal molecule in the pixel subregion provides response time, therefore, can reduce the probability that people's eye sees the smear, promote the quality that display module assembly shows the image.
In an embodiment, with continued reference to fig. 1, a plurality of display pixels sp are sequentially arranged in a first direction x to form a pixel row spx, and the pixel array PA includes N1 pixel rows spx extending in the first direction x and arranged in a second direction y, each pixel partition PA is formed by m1 adjacent pixel rows spx, where m 1P is N1, and m1 is a positive integer. In fig. 1, 14 display pixels sp are sequentially arranged in the first direction x to form one pixel row spx, the pixel array PA includes 16 pixel rows spx, and each pixel partition PA is configured by 4 adjacent pixel rows spx.
By adopting the display module provided by the embodiment, when the pixel partitions are divided, one pixel row is divided into the same pixel partition, and the pixel rows in the same pixel partition are adjacent, the display scanning circuit can scan the display pixels row by row in the second direction, so that the display effect is improved. Meanwhile, the display scanning circuit can be sequentially connected with the scanning lines, so that the winding of the display scanning circuit on the frame of the display panel is reduced, and the narrow frame of the display panel is facilitated.
Fig. 4 is a schematic diagram of a backlight source structure in a display module according to another embodiment of the present invention, and in an embodiment, as shown in fig. 4, a backlight control circuit 40 includes P output terminals O, and the P output terminals O sequentially output lighting control signals, that is, a first output terminal O1 outputs a first lighting control signal, and a second output terminal O2 outputs a second lighting control signal to a pth output terminal OP outputting a pth lighting control signal. The yy output terminal Oy is connected to the light emitting unit lu in the y +1 th light emitting partition LA y +1, the pth output terminal OP is connected to the light emitting unit lu of the first light emitting partition LA1, in fig. 4, the 4 th output terminal O4 is connected to the light emitting unit lu of the first light emitting partition LA1, the 3 rd output terminal O3 is connected to the light emitting unit lu of the second light emitting partition LA2, the 2 nd output terminal O2 is connected to the light emitting unit lu of the third light emitting partition LA3, and the 1 st output terminal O1 is connected to the light emitting unit lu of the fourth light emitting partition LA 4.
Under the normal condition, each control end of the backlight control circuit sequentially outputs a lighting control signal, and by adopting the display module provided by the embodiment, the lighting time sequence of each lighting subarea is controlled through the corresponding relation of the backlight control circuit and the connecting circuit of the lighting subareas, so that the purpose of improving the smear problem is achieved, the control time sequence in the backlight control circuit is not required to be changed, the backlight control circuit is not required to be specially made, and the cost is reduced.
Fig. 5 is a schematic structural diagram of a display panel in a display module according to an embodiment of the present invention, in an embodiment, as shown in fig. 5, the display scanning circuit includes P sequentially cascaded scanning modules SM, each scanning module SM includes m1 sequentially cascaded scanning units su, each scanning unit su is connected to a display pixel sp of one pixel row spx, and a sum of durations of scanning signals output by all the scanning units su in each scanning module SM is equal to a duration of outputting the lighting control signal. In fig. 5, the display scan circuit includes 4 scan modules SM cascaded in sequence, a first scan module SM1, a second scan module SM2, a third scan module SM3, and a fourth scan module SM 4. Each scanning module SM comprises 4 scanning units su cascaded in sequence.
By adopting the display module provided by the embodiment, the sum of the time lengths of the scanning signals output by all the scanning units in each scanning module is equal to the time length of the output lighting control signal, that is, the scanning time length of one scanning module is equal to the lighting time length of one light-emitting partition, so that after each pixel partition in each scanning period is scanned, the corresponding light-emitting partition can be lighted at an interval of P-1 unit scanning time, and the probability of smear occurrence of each pixel partition in each scanning period can be reduced.
In one embodiment, the duration of the lighting control signal is a milliseconds, and a x (P-2) is greater than a predetermined duration threshold, wherein after one pixel partition PA receives the scanning signal, the pixel partition PA does not generate smear when the light emitting partition LA providing the light source for the pixel partition PA is lighted up after the predetermined duration threshold.
For example, in one embodiment, the resolution of the display panel is 1080 × 2160, one pixel partition is made of 135 adjacent pixel rows, the display panel includes 16 pixel partitions, and the display scanning circuit scans sequentially from the first pixel partition to the 16 th pixel partition in a progressive scanning manner. The backlight source comprises 16 light-emitting subareas which correspond to the pixel subareas one by one, and the backlight control circuit lights the pixels from the second light-emitting subarea to the 16 th light-emitting subarea and then to the 1 st light-emitting subarea one by one.
Experiment verifies that aiming at any one pixel partition of the display panel, after the pixel partition is charged for more than 5ms, the light-emitting partition of the light source provided by the pixel partition is lightened, so that the phenomenon that the human eyes see the smear can be avoided, namely, the preset time threshold is 5 ms. When the duration of the lighting control signal is set to be 1ms, that is, the scanning time of each pixel partition is 1ms, and the scanning frequency is about 60HZ, taking the first pixel partition as an example, after the display scanning circuit scans the first pixel partition, the first light-emitting partition corresponding to 14ms needs to be lit, so that the human eyes cannot see the smear.
By adopting the display module provided by the embodiment, the phenomenon that the human eyes cannot see the smear can be avoided by controlling the duration of the lighting control signal, namely the product of the scanning duration of one pixel partition and the P-2 is greater than the preset duration threshold. The scanning time of the pixel partition is related to the scanning frequency of the display panel and the number of pixel rows included in the pixel partition, and P is the number of the pixel partitions of the display panel, that is, on the premise that the scanning frequency of the display panel is determined and each pixel partition in the display panel includes the same number of pixel rows, the number of the pixel partitions of the display panel can be determined according to a preset time threshold, so that the purpose that the human eyes cannot see the smear is achieved.
Fig. 6 is a schematic diagram of a backlight structure in a display module according to still another embodiment of the present invention, in an embodiment, as shown in fig. 6, the light emitting array includes N2 light emitting unit rows lux extending in the first direction x and arranged in the second direction y, and the light emitting partition LA is formed by m2 adjacent light emitting unit rows lux, where m 2P is N2, m2 is a positive integer, and in fig. 6, m2 is 6. The backlight includes N2 first signal lines S1, each of the first signal lines S1 being connected to each of the light emitting cells lu of one light emitting cell row lux; the backlight source further comprises P connecting lines L, each connecting line L is connected with one output terminal O, and m2 first signal lines S1 connected with the light-emitting units lu in the same light-emitting subarea LA are connected with the same connecting line L, that is, the same light-emitting subarea LA receives the lighting control signal output by the same output terminal O of the backlight control circuit.
By adopting the display module provided by the embodiment, the same light-emitting partition outputs the lighting control signal through one output end of the light-emitting control circuit, so that the output ends of the backlight control circuit are reduced, meanwhile, each output end of the light-emitting control circuit provides the lighting control signal for one light-emitting partition through one connecting line, wiring on a backlight source is reduced, and the light-emitting units in the same light-emitting partition can be simultaneously lighted.
Fig. 7 is a schematic structural diagram of a backlight source in a display module according to still another embodiment of the present invention, in an embodiment, as shown in fig. 7, each of the light emitting units lu includes a positive electrode and a negative electrode, the first signal line S1 is connected to the positive electrode, the backlight source further includes a plurality of second signal lines S2, each of the second signal lines S2 is connected to the negative electrode of one of the light emitting units lu, and each of the second signal lines S2 is connected to the backlight control circuit 40.
By adopting the display module provided by the embodiment, each light-emitting unit is respectively connected with the backlight control circuit through one signal line, and the backlight control circuit can supply different cathode voltages to different light-emitting units according to the brightness of the displayed image, so that the brightness of each light-emitting unit can be independently adjusted, and the contrast of the display panel can be further improved.
Fig. 8 is a schematic structural diagram of a backlight source in a display module according to still another embodiment of the present invention, in an embodiment, as shown in fig. 8, a light emitting unit lu includes a positive electrode and a negative electrode, a first signal line S1 is connected to the positive electrode, and a light emitting array includes a plurality of light emitting unit columns luy extending in a second direction y and arranged in a first direction x; the backlight source further includes a plurality of second signal lines S2, each of the second signal lines S2 is connected to the cathodes of the light emitting cells lu of one of the light emitting cell columns luy, and each of the second signal lines S2 is connected to the backlight control circuit 40.
By adopting the display module provided by the embodiment, the same light emitting unit row is connected to the backlight control circuit through the same second signal line, so that wiring on the backlight source can be reduced, and further, each second signal line is connected to the same cathode voltage output end of the backlight control circuit, so that the output ends of the backlight control circuit can be further reduced.
Fig. 9 is a schematic diagram of a film layer of a backlight source in a display module according to an embodiment of the present invention, in an embodiment, as shown in fig. 9, the backlight source includes a circuit substrate layer 21, the circuit substrate layer 21 is made of an insulating material, the circuit substrate layer 21 includes a first surface 211 and a second surface 212 opposite to the first surface 211, each first signal line S1 is disposed on the first surface 211, and each second signal line S2 is disposed on the second surface 212. For example, the first signal line S1 and the connection line L in fig. 6 and 8 are located at the first surface S211, and the second signal line S2 in fig. 7 and 8 are located at the second surface S212.
By adopting the display module provided by the embodiment, the first signal line connected with the anode of the light-emitting unit is arranged on one surface of the backlight circuit substrate layer, the second signal line connected with the cathode of the light-emitting unit is arranged on the other surface of the backlight circuit substrate layer, and the first signal line and the second signal line are arranged on the same surface, so that the complexity of circuit arrangement can be reduced, and the risk of short circuit of the first signal line and the second signal line can be reduced.
The above is an embodiment of the display module provided by the present invention, and the present invention further provides a display device, where the display device includes any one of the display modules provided by the present invention, and has the technical features and corresponding technical effects, which are not described herein again.
Fig. 10 is a schematic view of a display device according to an embodiment of the invention, and in an embodiment, as shown in fig. 10, the display device includes a housing 200 and a display module 100 located in the housing 200, where the display module is any one of the display modules provided by the invention.
According to the embodiment, the display module and the display device provided by the invention at least realize the following beneficial effects:
the pixel array of the display panel and the light-emitting array of the backlight source are correspondingly divided into P subareas, the backlight control circuit independently lights one light-emitting subarea at any time, the local control of the backlight source can be realized, thereby the display contrast can be improved, simultaneously, the sequential control of the display scanning circuit and the backlight control circuit is realized, so that the display scanning circuit scans one pixel subarea in unit scanning time and needs to pass through P-1 unit scanning time, the backlight control circuit can control the corresponding light-emitting subareas to light, response time is provided for the deflection of liquid crystal molecules in the pixel subareas, therefore, the probability that people can see the smear can be reduced, and the quality of the display image of the display module is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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 (9)
1. A display module, comprising: display panel, backlight, display scanning circuit and backlight control circuit, wherein:
the display panel comprises a pixel array, the pixel array comprises P pixel partitions, each pixel partition comprises a plurality of display pixels, and P is an integer and is more than or equal to 2;
the backlight source comprises a light emitting array, the light emitting array comprises P light emitting subareas, each light emitting subarea comprises a plurality of light emitting units, wherein the x-th light emitting subarea provides light sources for the x-th pixel subarea, and x is more than or equal to 1 and less than or equal to P;
the display scanning circuit is used for scanning the P pixel partitions in sequence;
the backlight control circuit comprises P output ends, and the P output ends sequentially output lighting control signals; the y-th output end is connected with the light-emitting unit in the y + 1-th light-emitting subarea, and the P-th output end is connected with the light-emitting unit of the first light-emitting subarea; the backlight control circuit is used for lighting the light-emitting unit in the y +1 th light-emitting partition when the display scanning circuit scans the y th pixel partition, and lighting the light-emitting unit in the first light-emitting partition when the display scanning circuit scans the P th pixel partition, wherein y is more than or equal to 1 and less than or equal to P-1.
2. The display module of claim 1,
the pixel array comprises N1 pixel rows extending in a first direction and arranged in a second direction, and the pixel partitions are formed by m1 adjacent pixel rows, wherein the first direction and the second direction are crossed, m1 is P-N1, and m1 is a positive integer.
3. The display module of claim 2,
the display scanning circuit comprises P scanning modules which are sequentially cascaded, each scanning module comprises m1 scanning units which are sequentially cascaded, and each scanning unit is connected with the display pixels of one pixel row;
the sum of the time lengths of the scanning signals output by all the scanning units in each scanning module is equal to the time length of the output lighting control signal.
4. The display module of claim 3,
the lighting control signal is a millisecond in duration, and a x (P-2) is greater than a preset duration threshold, wherein after one pixel partition receives the scanning signal, the light emitting partition providing a light source for the pixel partition is lighted through the preset duration threshold, and the pixel partition does not generate smear.
5. The display module of claim 2,
the light emitting array comprises N2 light emitting unit rows extending in the first direction and arranged in the second direction, and the light emitting subareas are formed by m2 adjacent light emitting unit rows, wherein m2 is P-N2, and m2 is a positive integer;
the backlight source comprises N2 first signal lines, each first signal line is connected with each light-emitting unit of one light-emitting unit row;
the backlight source comprises P connecting lines, and each connecting line is connected with one output end;
the m2 first signal lines connected with the light-emitting units in the same light-emitting partition are connected with the same connecting line.
6. The display module of claim 5,
the light-emitting unit comprises an anode and a cathode, and the first signal line is connected with the anode;
the backlight source also comprises a plurality of second signal lines, each second signal line is connected with the negative electrode of one light-emitting unit, and each second signal line is connected with the backlight control circuit.
7. The display module assembly of claim 5, wherein the light-emitting diode is disposed on the substrate
The light-emitting unit comprises an anode and a cathode, and the first signal line is connected with the anode;
the light emitting array comprises a plurality of light emitting unit columns extending in the second direction and arranged in the first direction;
the backlight source also comprises a plurality of second signal lines, each second signal line is connected with the negative electrode of each light-emitting unit of one light-emitting unit row, and each second signal line is connected with the backlight control circuit.
8. The display module according to claim 6 or 7,
the backlight includes a circuit substrate layer including opposing first and second surfaces;
each of the first signal lines is disposed on the first surface, and each of the second signal lines is disposed on the second surface.
9. A display device, comprising the display module set of any one of claims 1 to 8.
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| CN113012609A (en) * | 2020-10-22 | 2021-06-22 | 重庆康佳光电技术研究院有限公司 | Display panel manufacturing method and display panel |
| CN113808548A (en) * | 2021-09-29 | 2021-12-17 | 武汉华星光电技术有限公司 | Display device and driving method thereof |
| CN114267308B (en) * | 2021-12-22 | 2023-03-14 | 深圳创维－Rgb电子有限公司 | Liquid crystal display screen scanning method and device, and liquid crystal display screen |
| CN115268139A (en) * | 2022-07-12 | 2022-11-01 | Tcl华星光电技术有限公司 | Display module and backlight module thereof |
| CN115376472B (en) * | 2022-09-29 | 2023-09-19 | 惠科股份有限公司 | Backlight module, display module and electronic equipment |
| CN116129818A (en) * | 2022-12-19 | 2023-05-16 | 厦门天马微电子有限公司 | Display module, driving method thereof and display device |
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| CN100437272C (en) * | 2004-10-14 | 2008-11-26 | 中强光电股份有限公司 | Method for driving device of generating plane light source, and structure |
| US20090122087A1 (en) * | 2007-11-02 | 2009-05-14 | Junichi Maruyama | Display device |
| IL228331A0 (en) * | 2013-09-10 | 2014-07-31 | Elbit Systems Ltd | Liquid crystal display having a rolling backlight |
| CN103839529B (en) * | 2014-02-25 | 2017-05-03 | 青岛海信电器股份有限公司 | Driving system and method of backlight source |
| CN104835456A (en) * | 2015-06-03 | 2015-08-12 | 蔡明雄 | LED backlight scanning control method and device for liquid crystal display |
| CN107978281B (en) * | 2017-12-12 | 2020-11-10 | 北京京东方光电科技有限公司 | Backlight module driving method and device and display device |
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