CN111063310A - Display and brightness adjusting method thereof - Google Patents
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- CN111063310A CN111063310A CN202010013940.XA CN202010013940A CN111063310A CN 111063310 A CN111063310 A CN 111063310A CN 202010013940 A CN202010013940 A CN 202010013940A CN 111063310 A CN111063310 A CN 111063310A
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
- G09G2320/062—Adjustment of illumination source parameters
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
The invention relates to a display, which comprises a backlight source, a driving module and a control module, wherein the backlight source comprises a plurality of light-emitting assemblies which are arranged in an array, each light-emitting assembly comprises a1 st light-emitting unit, a 2 nd light-emitting unit, a 3 rd light-emitting unit, … and an Nth light-emitting unit, wherein N is an integer more than 1; sequentially driving a plurality of 1 st light emitting cells, a plurality of 2 nd light emitting cells, a plurality of 3 rd light emitting cells, …, and a plurality of nth light emitting cells in one driving period of the backlight; the driving module is used for detecting the driving information of the 1 st light-emitting units, the 2 nd light-emitting units, the 3 rd light-emitting units, … and the Nth light-emitting units and judging whether each light-emitting unit fails or not according to the driving information; the control module is used for controlling any other light-emitting unit of the light-emitting component to replace the failed Nth light-emitting unit to drive in each driving period of the backlight source when the Nth light-emitting unit of one light-emitting component fails.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display and a brightness adjusting method of the display.
Background
As the light emitting efficiency of the light emitting diode is continuously improved and the cost is gradually reduced, the light emitting diode gradually replaces a cold cathode fluorescent lamp as a backlight source. The service life of the light emitting diodes on the backlight source is different due to the difference of the manufacturing process, and the backlight source may have the phenomenon that the individual light emitting diodes are abnormally disabled in the using process, and the area corresponding to the disabled light emitting diodes on the display panel has obvious brightness difference with other areas due to the influence of the disabled light emitting diodes, so that the display quality of the display is influenced.
Disclosure of Invention
Accordingly, it is necessary to provide a display and a method for adjusting the brightness of the display, which solve the problem that the area corresponding to the failed led on the display panel has a significant brightness difference from other areas due to the abnormal failure of the individual led.
A display comprises a backlight source, wherein the backlight source comprises a plurality of light emitting assemblies arranged in an array, each light emitting assembly comprises a1 st light emitting unit, a 2 nd light emitting unit, a 3 rd light emitting unit, … and an Nth light emitting unit, wherein N is an integer greater than 1; in one driving period of the backlight, the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, and the plurality of nth light emitting cells are sequentially driven; the display further includes:
the driving module is respectively electrically connected with each light-emitting assembly and used for detecting the driving information of the multiple 1 st light-emitting units, the multiple 2 nd light-emitting units, the multiple 3 rd light-emitting units, … and the multiple Nth light-emitting units and judging whether each light-emitting unit fails or not according to the driving information; and
and the control module is respectively electrically connected with each light-emitting assembly and used for controlling any other light-emitting unit of the light-emitting assembly to replace the failed Nth light-emitting unit to drive in each driving period of the backlight source when the Nth light-emitting unit of one light-emitting assembly fails.
According to the display, the light emitting assemblies arranged in an array mode are arranged on the backlight source, each light emitting assembly comprises the plurality of light emitting units, when one light emitting unit in the light emitting assemblies fails, any other light emitting unit of the light emitting assemblies is controlled to replace the failed light emitting unit to drive, and therefore when the light emitting units fail, brightness difference between the areas corresponding to the failed light emitting units and other areas on the display panel is avoided, and display quality of the display is improved.
In one embodiment, the driving module is further configured to record a position of a light emitting component where the nth light emitting unit is located on the backlight.
In one embodiment, the driving information includes a driving current and a driving voltage.
In one embodiment, the backlight is a direct-lit backlight or a side-lit backlight.
In one embodiment, the light emitting unit is a light emitting diode.
A method for adjusting the brightness of a display comprises a backlight source, wherein the backlight source comprises a plurality of light-emitting assemblies which are arranged in an array, each light-emitting assembly comprises a1 st light-emitting unit, a 2 nd light-emitting unit, a 3 rd light-emitting unit, … and an Nth light-emitting unit, and N is an integer greater than 1; in one driving period of the backlight, the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, and the plurality of nth light emitting cells are sequentially driven; the brightness adjusting method of the display comprises the following steps:
detecting driving information of the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, the plurality of nth light emitting cells;
judging whether each light-emitting unit fails according to the driving information;
and when the Nth light-emitting unit of one light-emitting component fails, controlling any other light-emitting unit of the light-emitting component to replace the failed Nth light-emitting unit to drive in each driving period of the backlight source.
According to the brightness adjusting method of the display, the light emitting assemblies arranged in an array mode are arranged on the backlight source, each light emitting assembly comprises the plurality of light emitting units, when one light emitting unit in the light emitting assemblies fails, any other light emitting unit of the light emitting assemblies is controlled to replace the failed light emitting unit for driving, therefore, when the light emitting units fail, the brightness difference between the area corresponding to the failed light emitting unit and other areas on the display panel is avoided, and the display quality of the display is improved.
In one embodiment, the method further comprises the following steps:
and recording the position of the light-emitting component where the Nth light-emitting unit is located on the backlight source.
In one embodiment, the driving information includes a driving current and a driving voltage.
In one embodiment, the backlight is a direct-lit backlight or a side-lit backlight.
In one embodiment, the light emitting unit is a light emitting diode.
Drawings
FIG. 1 is a schematic diagram of a display according to an embodiment;
FIG. 2 is a top view of a backlight in an embodiment;
FIG. 3 is a diagram of a matrix A1 in one embodiment;
FIG. 4 is a diagram of matrix B1 in one embodiment;
FIG. 5 is a driving diagram of a backlight according to an embodiment;
FIG. 6 is a schematic diagram of driving a backlight according to another embodiment;
FIG. 7 is a flowchart illustrating a method for adjusting brightness of a display according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, an embodiment of the present disclosure provides a display including a backlight 10, a driving module 20, a control module 30, and a display panel 40.
The backlight 10 is located on one side of the light incident surface of the display panel 40, the backlight 10 includes a plurality of light emitting elements 11 arranged in an array, and light emitted by the light emitting elements 11 is modulated by the display panel 40 and then emitted from the light emitting surface of the display panel 40. Each of the light emitting assemblies 11 includes a1 st light emitting unit, a 2 nd light emitting unit, a 3 rd light emitting unit, …, and an nth light emitting unit, where N is an integer greater than 1. In one driving period of the backlight 10, the plurality of 1 st light-emitting units, the plurality of 2 nd light-emitting units, the plurality of 3 rd light-emitting units, …, and the plurality of nth light-emitting units are sequentially driven, that is, at a first driving time of the driving period of the backlight 10, all the 1 st light-emitting units are simultaneously driven to emit light, at a second driving time of the driving period of the backlight 10, all the 2 nd light-emitting units are simultaneously driven to emit light, at a third driving time of the driving period of the backlight 10, all the 3 rd light-emitting units are simultaneously driven to emit light, and so on, at an nth driving time of the driving period of the backlight 10, all the nth light-emitting units are simultaneously driven to emit light, and one driving period of the backlight 10 includes the first driving time, the second driving time, the third driving time, …, and the nth driving time.
In some embodiments, backlight 10 may be a direct-lit backlight 10 or a side-lit backlight 10. The Light Emitting unit may be an LED (Light Emitting Diode), and the LED has high Light Emitting efficiency and low cost. The display may be a liquid crystal display, and the display panel 40 may be a liquid crystal panel.
The driving module 20 is electrically connected to each light emitting assembly 11, and specifically, the driving module 20 is electrically connected to the multiple 1 st light emitting units, the multiple 2 nd light emitting units, the multiple 3 rd light emitting units, …, and the multiple nth light emitting units, and is configured to detect driving information of the multiple 1 st light emitting units, the multiple 2 nd light emitting units, the multiple 3 rd light emitting units, …, and the multiple nth light emitting units, and determine whether each light emitting unit fails according to the driving information.
The control module 30 is electrically connected to each light emitting assembly 11, the control module 30 can be electrically connected to the driving module 20, and further the control module 30 is electrically connected to each light emitting assembly 11 through the driving module 20, and further the control module 30 is electrically connected to the plurality of 1 st light emitting units, the plurality of 2 nd light emitting units, the plurality of 3 rd light emitting units, …, and the plurality of nth light emitting units through the driving module 20. The control module 30 is configured to, when an nth light-emitting unit of one of the light-emitting assemblies 11 fails, control any other light-emitting unit of the light-emitting assembly 11 to replace the failed nth light-emitting unit for driving in each driving cycle of the backlight 10. For example, each light emitting module 11 includes a1 st light emitting unit, a 2 nd light emitting unit, and a 3 rd light emitting unit, in one driving cycle of the backlight 10, the plurality of 1 st light emitting units, the plurality of 2 nd light emitting units, and the plurality of 3 rd light emitting units are sequentially driven, and when the 1 st light emitting unit of one light emitting module 11 fails, in each driving cycle of the backlight 10, at the driving time of the plurality of 1 st light emitting units, the 2 nd light emitting unit or the 3 rd light emitting unit of the light emitting module 11 where the failed 1 st light emitting unit is located is driven instead of the failed 1 st light emitting unit, so as not to affect the overall light emission of the backlight 10.
The light emitting unit fails, i.e., the light emitting unit does not emit light due to its own failure.
In some embodiments, the driving module 20 is further configured to record the position of the light emitting assembly 11 where the nth light emitting unit is located on the backlight 10. By recording the position of the light emitting assembly 11 where the nth light emitting unit is located on the backlight 10, when the nth light emitting unit fails, the failed nth light emitting unit can be quickly positioned, so that any other light emitting unit of the located light emitting assembly 11 is controlled to replace the failed nth light emitting unit for driving, and display of the display is prevented from being influenced.
The driving information includes a driving current and a driving voltage. Whether the light emitting unit is in an open circuit or not can be judged by detecting the driving current of the light emitting unit, and whether the light emitting unit is in a short circuit or an open circuit or not can be judged by detecting the driving voltage of the light emitting unit. Specifically, the driving module 20 may store a preset driving current and a preset driving voltage, the driving module 20 compares the detected driving current of each light emitting unit with the preset driving current or compares the detected driving voltage of each light emitting unit with the preset driving voltage, if a difference between the detected driving current of the light emitting unit and the preset driving current exceeds a preset driving current range, it is determined that the light emitting unit fails, and if a difference between the detected driving voltage of the light emitting unit and the preset driving voltage exceeds a preset driving voltage range, it is determined that the light emitting unit fails.
The control module 30 controls the driving of the light emitting cells on the backlight 10 by establishing an output power matrix corresponding to the light emitting cells on the backlight 10 and according to the output power matrix.
Referring to fig. 2, in an embodiment, the backlight 10 includes 4 rows and 8 columns of light emitting devices 11 arranged in an array, and each light emitting device 11 includes a1 st light emitting unit and a 2 nd light emitting unit. The control module 30 establishes an output power matrix a1 (shown in fig. 3) corresponding to the plurality of 1 st light-emitting cells on the backlight 10 and establishes an output power matrix B1 (shown in fig. 4) corresponding to the plurality of 2 nd light-emitting cells on the backlight 10. Referring to fig. 5, a driving period of the backlight 10 in fig. 5 is t1-t2, and fig. (a) is a schematic diagram illustrating that none of the 1 st light-emitting units and the 2 nd light-emitting units are driven in the driving period of the backlight 10, that is, the control module 30 does not output power to the 1 st light-emitting units and the 2 nd light-emitting units. Fig. b is a schematic diagram of the first driving time driving of the 1 st light-emitting units in one driving period t1-t2 of the backlight 10, and fig. c is a schematic diagram of the second driving time driving of the 2 nd light-emitting units in one driving period t1-t2 of the backlight 10. During a driving period t1-t2 of the backlight 10, the 1 st light-emitting units and the 2 nd light-emitting units are sequentially driven to emit light, and when the 1 st light-emitting units are driven, the control module 30 controls each 1 st light-emitting unit to be driven at a corresponding output power according to the output power matrix a 1. Each element of the output power matrix a1 corresponds to each 1 st light-emitting unit of the backlight 10, and when a plurality of 1 st light-emitting units are driven, the control module 30 controls a corresponding 1 st light-emitting unit to be driven with the output power according to the value of each element of the output power matrix a 1. When a plurality of 2 nd light emitting cells are driven, the control module 30 controls each 2 nd light emitting cell to be driven at a corresponding output power according to the output power matrix B1. Each element of the output power matrix B1 corresponds to each 2 nd light-emitting unit of the backlight 10, and when a plurality of 2 nd light-emitting units are driven, the control module 30 controls a corresponding 2 nd light-emitting unit to be driven with the output power according to the value of each element of the output power matrix B1.
When the 1 st light-emitting unit in the 2 nd row and the 5 th column on the backlight 10 and the 1 st light-emitting unit in the 3 rd row and the 4 th column on the backlight 10 fail, as shown in fig. 6, fig. (a) is a schematic diagram in which the plurality of 1 st light-emitting units and the plurality of 2 nd light-emitting units are not driven during the driving period t1-t2 of the backlight 10. Fig. b is a diagram illustrating the first driving time driving of the 1 st light-emitting units in one driving period t1-t2 of the backlight 10. In fig. c, in each driving period of the backlight 10, when the driving time is the driving time of the plurality of 1 st light emitting cells, the control module 30 controls the 2 nd light emitting cell on the 2 nd row, the 5 th column and the 2 nd light emitting cell on the 3 rd row and the 4 th column on the backlight 10 to be driven, and drives the 2 nd light emitting cell on the 2 nd row and the 5 th column on the backlight 10 by using the output power matrix a1 corresponding to the 2 nd row on the backlight 10, the numerical value of the element of the 1 st light emitting cell on the 5 th column as the output power, and drives the 2 nd light emitting cell on the 4 th column by using the output power matrix a1 corresponding to the 3 rd row on the backlight 10, and the numerical value of the element of the 1 st light emitting cell on the 4 th column as the output power, when the driving time is the driving time of the plurality of 2 nd light emitting cells, the control module 30 controls all the 2 nd light emitting cells by using the output power matrix B1 corresponding to one element as the output power And (6) moving.
In some embodiments, the driving module 20 is a PWM power driving module 20, the control module 30 transmits a PWM signal to the driving module 20, and the driving module 20 drives the light emitting unit with the PWM signal. Controlling the output power of each light emitting unit 221 of the backlight 10 using PWM can make the output power of each light emitting unit 221 more stable.
The display comprises a backlight source, wherein the backlight source is provided with light emitting assemblies arranged in an array, each light emitting assembly comprises a plurality of light emitting units, when a certain light emitting unit in the light emitting assembly fails, any other light emitting unit of the light emitting assembly is controlled to replace the failed light emitting unit for driving, so that when the light emitting unit fails, the brightness difference between the area corresponding to the failed light emitting unit and other areas on the display panel is avoided, and the display quality of the display is improved.
Referring to fig. 7, an embodiment of the present application further provides a method for adjusting brightness of a display, where the display includes a backlight source, the backlight source includes a plurality of light emitting assemblies arranged in an array, each light emitting assembly includes a1 st light emitting unit, a 2 nd light emitting unit, a 3 rd light emitting unit, …, and an nth light emitting unit, where N is an integer greater than 1. In one driving period of the backlight, the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, and the plurality of nth light emitting cells are sequentially driven. The brightness adjusting method of the display comprises the following steps.
Step S01, driving information of the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, and the plurality of nth light emitting cells is detected.
In step S02, it is determined whether each light emitting cell is failed based on the driving information.
In step S03, when the nth light-emitting unit of one of the light-emitting assemblies fails, in each driving cycle of the backlight, any other light-emitting unit of the light-emitting assembly is controlled to replace the failed nth light-emitting unit for driving.
The brightness adjusting method of the display further comprises the following steps:
and recording the position of the light-emitting component where the Nth light-emitting unit is located on the backlight source.
By recording the position of the light-emitting component where the Nth light-emitting unit is located on the backlight, the failed Nth light-emitting unit can be quickly positioned when the Nth light-emitting unit fails, so that any other light-emitting unit of the light-emitting component where the Nth light-emitting unit is located is controlled to replace the drive of the Nth light-emitting unit, and the display of the display is prevented from being influenced.
The driving information includes a driving current and a driving voltage. Whether the light emitting unit is in an open circuit or not can be judged by detecting the driving current of the light emitting unit, and whether the light emitting unit is in a short circuit or an open circuit or not can be judged by detecting the driving voltage of the light emitting unit.
In some embodiments, the backlight may be a direct-lit backlight or a side-lit backlight. The Light Emitting unit may be an LED (Light Emitting Diode), and the LED has high Light Emitting efficiency and low cost.
According to the brightness adjusting method of the display, the light emitting assemblies arranged in the array mode are arranged on the backlight source, each light emitting assembly comprises the plurality of light emitting units, when one light emitting unit in the light emitting assemblies fails, any other light emitting unit of the light emitting assemblies is controlled to replace the failed light emitting unit to drive, therefore, when the light emitting units fail, brightness difference occurs between the area corresponding to the failed light emitting unit and other areas on the display panel, and the display quality of the display is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display comprises a backlight source, wherein the backlight source comprises a plurality of light emitting assemblies arranged in an array, each light emitting assembly comprises a1 st light emitting unit, a 2 nd light emitting unit, a 3 rd light emitting unit, … and an Nth light emitting unit, wherein N is an integer greater than 1; in one driving period of the backlight, the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, and the plurality of nth light emitting cells are sequentially driven; characterized in that the display further comprises:
the driving module is respectively electrically connected with each light-emitting assembly and used for detecting the driving information of the multiple 1 st light-emitting units, the multiple 2 nd light-emitting units, the multiple 3 rd light-emitting units, … and the multiple Nth light-emitting units and judging whether each light-emitting unit fails or not according to the driving information; and
and the control module is respectively electrically connected with each light-emitting assembly and used for controlling any other light-emitting unit of the light-emitting assembly to replace the failed Nth light-emitting unit to drive in each driving period of the backlight source when the Nth light-emitting unit of one light-emitting assembly fails.
2. The display device according to claim 1, wherein the driving module is further configured to record a position of a light emitting assembly where the nth light emitting unit is located on the backlight.
3. The display of claim 1, wherein the driving information comprises a driving current and a driving voltage.
4. The display of claim 1, wherein the backlight is a direct-lit backlight or a side-lit backlight.
5. The display of claim 1, wherein the light emitting unit is a light emitting diode.
6. A method for adjusting the brightness of a display comprises a backlight source, wherein the backlight source comprises a plurality of light-emitting assemblies which are arranged in an array, each light-emitting assembly comprises a1 st light-emitting unit, a 2 nd light-emitting unit, a 3 rd light-emitting unit, … and an Nth light-emitting unit, and N is an integer greater than 1; in one driving period of the backlight, the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, and the plurality of nth light emitting cells are sequentially driven; the method for adjusting the brightness of the display is characterized by comprising the following steps:
detecting driving information of the plurality of 1 st light emitting cells, the plurality of 2 nd light emitting cells, the plurality of 3 rd light emitting cells, …, the plurality of nth light emitting cells;
judging whether each light-emitting unit fails according to the driving information;
and when the Nth light-emitting unit of one light-emitting component fails, controlling any other light-emitting unit of the light-emitting component to replace the failed Nth light-emitting unit to drive in each driving period of the backlight source.
7. The method for adjusting brightness of a display according to claim 6, further comprising:
and recording the position of the light-emitting component where the Nth light-emitting unit is located on the backlight source.
8. The method according to claim 6, wherein the driving information comprises a driving current and a driving voltage.
9. The method of claim 6, wherein the backlight source is a direct-type backlight source or a side-type backlight source.
10. The method of claim 6, wherein the light emitting unit is a light emitting diode.
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Application publication date: 20200424 |