CN112530376A - Display panel and backlight adjusting method thereof - Google Patents
Display panel and backlight adjusting method thereof Download PDFInfo
- Publication number
- CN112530376A CN112530376A CN202011404265.XA CN202011404265A CN112530376A CN 112530376 A CN112530376 A CN 112530376A CN 202011404265 A CN202011404265 A CN 202011404265A CN 112530376 A CN112530376 A CN 112530376A
- Authority
- CN
- China
- Prior art keywords
- display
- backlight
- brightness
- display panel
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
-
- 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
-
- 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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a display panel, which comprises a backlight module, a liquid crystal panel and a display screen driving chip, wherein the backlight module comprises a plurality of backlight subareas, each backlight subarea is provided with at least one backlight source, the liquid crystal panel comprises a plurality of display subareas, each display subarea is positioned right above the projection of the corresponding backlight subarea, each display subarea is provided with at least one photoelectric sensor, the photoelectric sensors are used for converting optical signals emitted by the backlight sources into electric signals, the display screen driving chip is positioned on the liquid crystal panel and is electrically connected with the photoelectric sensors and used for adjusting the display brightness of the display subareas to be the same according to the electric signals, the display panel provided by the invention receives the optical signals emitted by the backlight sources and converts the optical signals into the electric signals by arranging the photoelectric sensors on the liquid crystal panel, and adjusts the display brightness of the display subareas of the liquid crystal panel according to the electric signals, thereby improving the display quality of the display panel.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a display panel and a backlight adjusting method thereof.
Background
Lcd (liquid Crystal display) lcd panels are non-emissive display devices, the display graphics or characters of the lcd panels are the result of modulating light, the lcd panels need to be capable of displaying with the help of backlight sources, and the quality of the backlight source directly affects the display quality of the lcd panels.
The subarea backlight technology is that a backlight plate consisting of independently controllable backlight blocks is used as a backlight source of the liquid crystal display panel, and the subareas are independently controllable, so that the display brightness, the contrast and the energy consumption of the liquid crystal display screen based on the technology are greatly improved compared with the traditional liquid crystal display screen.
However, in the liquid crystal display panel in the prior art, the backlight source is aged in the using process, and further, when the liquid crystal display panel displays images, the brightness of each display area is inconsistent, so that the display quality is poor.
Disclosure of Invention
The invention provides a display panel and a backlight adjusting method thereof, which effectively solve the problem of poor image quality caused by inconsistent brightness of each display partition when a backlight source of the display panel is aged in the using process and displays images.
In order to solve the above problems, the present invention provides a display panel including:
the backlight module comprises a plurality of backlight partitions, and each backlight partition is provided with at least one backlight source;
the liquid crystal panel comprises a plurality of display subareas, each display subarea is positioned right above the projection of the corresponding backlight subarea, and each display subarea is provided with at least one photoelectric sensor which is used for converting an optical signal emitted by the backlight source into an electric signal;
and the display screen driving chip is positioned on the liquid crystal panel and electrically connected with the photoelectric sensor, and is used for adjusting the display brightness of the display subareas to be the same according to the electric signal.
Preferably, the backlight module further includes a backlight driving circuit, the backlight driving circuit is electrically connected to the display screen driving chip, and the display screen driving chip adjusts the first driving strength of the backlight driving circuit according to the electrical signal to make the luminance of each backlight source consistent, so as to control the display luminance of the plurality of display partitions to be the same.
Preferably, the liquid crystal panel further includes a pixel driving circuit, the pixel driving circuit is electrically connected to the display panel driving chip, and the display panel driving chip adjusts the pixel transmittance of the plurality of display partitions by adjusting the second driving strength of the pixel driving circuit according to the electrical signal, so as to control the display luminance of the plurality of display partitions to be the same.
Further preferably, the photosensor includes a photodiode, a thin film capacitor, an address gate electrode tube, and an interconnection wire.
In another aspect, the present invention further provides a backlight adjusting method of a display panel, where the backlight adjusting method includes:
an acquisition step, namely acquiring brightness readings of all display partitions of the display panel;
generating a gain control map according to the brightness reading;
and adjusting, namely adjusting the display brightness of each display partition of the display panel to be the same according to the gain control map.
Further preferably, the generating step specifically includes:
a first generation sub-step of generating a partitioned luminance reading map from the luminance readings;
a second generation substep, namely performing normalization processing on the subarea brightness reading map to obtain a subarea brightness data map;
and a third generation substep, generating a gain control map according to the numerical value in the partition brightness data map and a first preset formula.
Further preferably, the acquiring step specifically includes:
an obtaining sub-step, obtaining a plurality of brightness readings to be weighted of each display partition of the display panel;
and a calculation substep, performing weighted calculation on the plurality of brightness readings to be weighted according to a second preset formula to obtain the brightness readings.
Further preferably, the display panel includes a backlight driving circuit, and the adjusting step specifically includes:
and a first adjusting substep, adjusting the first driving strength of the backlight driving circuit according to the gain control map, so that the brightness of the backlight source corresponding to each display partition of the display panel is consistent, and the display brightness of each display partition of the display panel is controlled to be the same.
Further preferably, the display panel includes a pixel driving circuit, and the adjusting step specifically includes:
and a second adjustment substep of adjusting the pixel transmittance of each display partition of the display panel by adjusting a second driving strength of the pixel driving circuit according to the gain control map, thereby controlling the display brightness of each display partition of the display panel to be the same.
Further preferably, before the adjusting step, the first driving strength and/or the second driving strength corresponding to each display partition of the display panel are/is the same.
The invention has the beneficial effects that: the invention provides a display panel, which comprises a backlight module, a liquid crystal panel and a display screen driving chip, wherein the backlight module comprises a plurality of backlight subareas, each backlight subarea is provided with at least one backlight source, the liquid crystal panel comprises a plurality of display subareas, each display subarea is positioned right above the projection of the corresponding backlight subarea, each display subarea is provided with at least one photoelectric sensor, the photoelectric sensors are used for converting optical signals emitted by the backlight source into electric signals, the display screen driving chip is positioned on the liquid crystal panel and is electrically connected with the photoelectric sensors, the display screen driving chip is used for adjusting the display brightness of the display subareas to be the same according to the electric signals, the display panel provided by the invention receives the optical signals emitted by the backlight source and converts the optical signals into the electric signals by arranging the photoelectric sensors on the liquid crystal panel, and adjusts the display brightness of the display subareas of the liquid crystal panel according to the electric, therefore, the problem that the brightness of each display partition is inconsistent when the backlight source of the display panel displays images due to aging in the using process is avoided, and the display quality of the display panel is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments according to the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a first detailed structure of a display panel according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating a second detailed structure of the display panel according to the embodiment of the invention.
Fig. 4 is a flowchart illustrating a backlight adjusting method of a display panel according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the 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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and 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 considered as limiting the present 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The embodiment of the invention aims at solving the problem that the display quality is poor due to the fact that the brightness of each display partition is inconsistent when the display panel displays images because the backlight source of the existing display panel is aged in the using process.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, in which components and relative positions of the components can be visually seen.
As shown in fig. 1, the display panel 100 includes a backlight module 110 and a liquid crystal panel 120, wherein:
the backlight module 110 includes a plurality of backlight partitions, each of which has at least one backlight source 111;
the liquid crystal panel 120 includes a plurality of display partitions, each display partition is located directly above the projection of the corresponding backlight partition, each display partition has at least one photosensor 121, the photosensor 121 is configured to convert an optical signal emitted by the backlight 111 into an electrical signal, the liquid crystal panel 120 further includes a display screen driving chip 122, the display screen driving chip 122 is electrically connected to the photosensor 121, and the display screen driving chip 122 is configured to adjust the display brightness of the plurality of display partitions to be the same according to the electrical signal.
Specifically, the photosensor 121 is fabricated on a TFT (Thin Film Transistor) glass substrate of the liquid crystal panel 120, and the photosensor 121 includes a series of microelectronic physical devices such as photodiodes, Thin Film capacitors, address gate diodes, and interconnection wires, which can convert optical signals into electrical signals and transmit the electrical signals to an external circuit.
In this embodiment, the optical signal is an optical signal emitted by the backlight 111, and after receiving the optical signal emitted by the backlight 111, the photoelectric sensor 121 converts the optical signal into a corresponding electrical signal, and then transmits the electrical signal to the display screen driving chip 122, so that the display screen driving chip 122 performs corresponding adjustment on the display panel 100 according to the electrical signal, so that the display brightness of each display partition of the display panel 100 is the same.
Further, the backlight module 110 further includes a backlight driving circuit, the backlight driving circuit is electrically connected to the display screen driving chip 122, and the display screen driving chip 122 adjusts the first driving strength of the backlight driving circuit according to the electrical signal, so as to make the luminance of each backlight source 111 consistent, thereby controlling the display luminance of the plurality of display partitions to be the same.
For example, referring to fig. 2, fig. 2 is a schematic diagram of a first detailed structure of a display panel according to an embodiment of the present invention, in which a backlight module 110 of the display panel 100 includes a backlight partition a1 and a backlight partition a2, and a backlight 111 in the backlight partition a1a1With the backlight 111 in the backlight partition a2a2The backlight 111 has different aging degrees during usea1Is aged more than the backlight 111a2So that the backlight 111 is madea1The intensity of the emitted light is less than that of the backlight 111a2Intensity of the emitted light, and thus, the photosensor 121 in the display section b1 corresponding to the backlight section a1b1According to the backlight 111a1The voltage value of the electrical signal v1 converted from the emitted light signal is smaller than that of the photoelectric sensor 121 in the display sub-area b2 corresponding to the backlight sub-area a2b2According to the backlight 111a2The voltage value of the electrical signal v2 converted from the emitted optical signal. At this time, after receiving the electrical signal v1 and the electrical signal v2, the display panel driving chip 122 correspondingly adjusts the first driving strength of the backlight driving circuit in the backlight module 110 according to the two electrical signals. Specifically, the panel driving chip 122 increases the first driving strength of the backlight driving circuit corresponding to the backlight partition a1, and decreases the first driving strength of the backlight driving circuit corresponding to the backlight partition a2, so as to make the backlight source 111a1And a backlight 111a2Are made uniform in emission luminance fromAnd the display brightness of the display sub-section b1 corresponding to the backlight sub-section a1 and the display sub-section b2 corresponding to the backlight sub-section a2 are ensured to be the same.
Further, the liquid crystal panel 120 further includes a pixel driving circuit electrically connected to the display driving chip 122, and the display driving chip 122 adjusts the pixel transmittance of the plurality of display partitions by adjusting the second driving strength of the pixel driving circuit according to the electrical signal, so as to control the display luminance of the plurality of display partitions to be the same.
For example, referring to fig. 3, fig. 3 is a schematic diagram of a second detailed structure of a display panel according to an embodiment of the present invention, in which a backlight module 110 of the display panel 100 includes a backlight partition a3 and a backlight partition a4, and a backlight 111 in the backlight partition a3a3With the backlight 111 in the backlight partition a4a4The backlight 111 has different aging degrees during usea3Is aged more than the backlight 111a4So that the backlight 111 is madea3The intensity of the emitted light is less than that of the backlight 111a4Intensity of the emitted light, and thus, the photosensor 121 in the display section b3 corresponding to the backlight section a3b3According to the backlight 111a3The voltage value of the electrical signal v3 converted from the emitted light signal is smaller than that of the photoelectric sensor 121 in the display sub-area b4 corresponding to the backlight sub-area a4b4According to the backlight 111a4The voltage value of the electrical signal v4 converted from the emitted optical signal. At this time, after receiving the electrical signal v3 and the electrical signal v4, the panel driving chip 122 adjusts the second driving strength of the pixel driving circuit in the liquid crystal panel 120 accordingly. Specifically, the display panel driving chip 122 adjusts the transmittance of the pixels in the pixel driving circuit corresponding to the display sub-area b3 to be higher, and adjusts the transmittance of the pixels in the pixel driving circuit corresponding to the display sub-area b4 to be lower, so as to ensure that the display luminance of the display sub-area b3 and the display sub-area b4 are the same.
Different from the prior art, the present invention provides a display panel 100, the display panel 100 includes a backlight module 110, a liquid crystal panel 120 and a display screen driving chip 122, wherein the backlight module 110 includes a plurality of backlight partitions, each backlight partition has at least one backlight source 111, the liquid crystal panel 120 includes a plurality of display partitions, each display partition is located directly above a projection of the corresponding backlight partition, and each display partition has at least one photosensor 121, the photosensor 121 is configured to convert an optical signal emitted by the backlight source 111 into an electrical signal, the display screen driving chip 122 is located on the liquid crystal panel 120 and electrically connected to the photosensor 121, the display screen driving chip 122 is configured to adjust display brightness of the plurality of display partitions to be the same according to the electrical signal, the display panel 100 provided by the present invention, the photosensor 121 is disposed on the liquid crystal panel 120 to receive the optical signal emitted by the backlight source 111 and convert the optical signal into the electrical signal, and the display brightness of the display partition of the liquid crystal panel 120 is adjusted according to the electrical signal, thereby avoiding the problem that the brightness of each display partition is inconsistent when the backlight 111 of the display panel 100 displays images due to aging in the using process, and improving the display quality of the display panel 100.
Referring to fig. 4, fig. 4 is a flowchart illustrating a backlight adjusting method of a display panel according to an embodiment of the invention, where the backlight adjusting method is applied to the display panel 100. The specific process of the backlight adjusting method provided by the embodiment of the invention can be as follows:
and S101, acquiring brightness readings of all display partitions of the display panel.
It is easy to understand that when the mobile terminal provided with the display panel 100 is powered on, all the backlights 111 in the display panel 100 are lit to a uniform driving intensity mode, that is, the backlight driving circuit in the backlight module 110 controls the first driving intensity of each backlight partition to be the same, so as to measure the brightness of each backlight partition before performing brightness adjustment on the display panel. At this time, the photosensor 121 in the display panel 100 acquires an optical signal emitted from the backlight 111, and obtains a brightness reading of each display section of the display panel according to an electrical signal converted from the optical signal.
Specifically, the acquiring step S101 may include:
an obtaining sub-step, obtaining a plurality of brightness readings to be weighted of each display partition of the display panel;
and a calculation substep, performing weighted calculation on the plurality of brightness readings to be weighted according to a second preset formula to obtain the brightness readings.
It is easy to understand that, a plurality of photosensors 121 may be disposed in the liquid crystal panel 120, and the light signals from the backlight 111 are simultaneously obtained to obtain a plurality of luminance readings to be weighted for each display region, and the precision of the luminance readings obtained by performing weighting calculation on the plurality of luminance readings to be weighted according to a preset formula is correspondingly improved.
And S102, generating a gain control map according to the brightness reading.
It is easy to understand that after the mobile terminal obtains the brightness readings of the display partitions, a gain control map is generated according to the brightness readings, and then the display screen driving chip 122 of the display panel 100 adjusts the display brightness of the display partitions of the display panel to be the same according to the gain control map.
Specifically, the generating step S102 may include:
a first generation sub-step of generating a partitioned luminance reading map from the luminance readings;
a second generation substep, namely performing normalization processing on the subarea brightness reading map to obtain a subarea brightness data map;
and a third generation substep of generating a gain control map according to the values in the partitioned brightness data map and a first preset formula.
It is easy to understand that the normalization process is to convert a dimensional vector in the partitioned brightness reading map into a dimensionless scalar, specifically, regard the data with the highest appearance frequency of a same value in the partitioned brightness reading map as unit 1, calculate the proportional relationship between the rest of data (defined as X herein) and the data with the highest appearance frequency (defined as Y herein), and finally obtain the partitioned brightness data map. Specifically, the method comprises the following steps: x is normalized to X ' and Y is normalized to 1, and wherein if X is less than Y, the value of X ' is between 0 and 1, and if X is greater than Y, the value of X ' is greater than 1.
Furthermore, if there are a plurality of data Y with the same numerical value and the highest frequency of occurrence in the map of the divisional luminance readings, the weighted values of the plurality of data Y are calculated according to a third preset formula, and the weighted values are regarded as unit 1, and then the map of the divisional luminance data is obtained by calculation.
Further, in the third generation sub-step, the gain control map may be obtained by calculating an inverse of a value in the partitioned luminance data map.
And an adjusting step S103, adjusting the display brightness of each display partition of the display panel to be the same according to the gain control map.
It is easy to understand that the gain control map instructs the display screen driving chip 122 of the display panel 100 to adjust the first driving strength corresponding to each backlight partition of the backlight driving circuit in the backlight module 110 and/or the second driving strength corresponding to each display partition of the pixel driving circuit in the liquid crystal panel 120 to be a specific multiple of the existing value, so as to adjust the display brightness of each display partition of the display panel 100 to be the same.
Specifically, the adjusting step S103 may include:
and a first adjusting sub-step, adjusting the first driving strength of the backlight driving circuit according to the gain control map, so that the luminance of the backlight source corresponding to each display partition of the display panel is consistent, and the display luminance of each display partition of the display panel is controlled to be the same.
Further, the adjusting step S103 may further include:
and a second adjusting sub-step of adjusting the pixel transmittance of each display section of the display panel by adjusting the second driving strength of the pixel driving circuit according to the gain control map, thereby controlling the display brightness of each display section of the display panel to be the same.
Specifically, before the adjusting step S103, the first driving strength and/or the second driving strength corresponding to each display partition of the display panel are the same.
It is easy to understand that the mobile terminal provided with the display panel 100 will illuminate all the backlights 111 to a uniform driving intensity mode under a specific condition, such as a short moment when the user presses the power key to place the mobile terminal in the standby mode, or a short moment when the user presses the power key to activate the mobile terminal from the standby mode for use, so as to perform the subsequent brightness sampling (i.e. the obtaining step S101) and the gain correction process (i.e. the adjusting step S103).
Different from the prior art, the present invention provides a backlight adjusting method of a display panel 100, comprising: the brightness readings of the display partitions of the display panel are obtained, the gain control map is generated according to the brightness readings, and then the display brightness of the display partitions of the display panel is adjusted to be the same according to the gain control map, so that the problem that the brightness of the display partitions is inconsistent when the backlight of the display panel 100 displays images due to aging in the use process of the backlight of the display panel is solved, and the display quality of the display panel 100 is improved.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by using equivalents or equivalent substitutions fall within the protection scope of the claims of the present invention.
In summary, although the preferred embodiments of the present invention have been described above, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A display panel, comprising:
the backlight module comprises a plurality of backlight partitions, and each backlight partition is provided with at least one backlight source;
the liquid crystal panel comprises a plurality of display subareas, each display subarea is positioned right above the projection of the corresponding backlight subarea, and each display subarea is provided with at least one photoelectric sensor which is used for converting an optical signal emitted by the backlight source into an electric signal;
and the display screen driving chip is positioned on the liquid crystal panel and electrically connected with the photoelectric sensor, and is used for adjusting the display brightness of the display subareas to be the same according to the electric signal.
2. The display panel according to claim 1, wherein the backlight module further includes a backlight driving circuit, the backlight driving circuit is electrically connected to the display screen driving chip, and the display screen driving chip adjusts a first driving strength of the backlight driving circuit according to the electrical signal to make a light emitting brightness of each of the backlight sources consistent, so as to control display brightness of the plurality of display partitions to be the same.
3. The display panel according to claim 1, wherein the liquid crystal panel further comprises a pixel driving circuit, the pixel driving circuit is electrically connected to the display driving chip, and the display driving chip adjusts the pixel transmittance of the plurality of display sections by adjusting the second driving strength of the pixel driving circuit according to the electrical signal, so as to control the display luminance of the plurality of display sections to be the same.
4. The display panel of claim 1, wherein the photosensors comprise photodiodes, thin film capacitors, address gate diodes, and interconnect wires.
5. A backlight adjusting method of a display panel, the backlight adjusting method comprising:
an acquisition step, namely acquiring brightness readings of all display partitions of the display panel;
generating a gain control map according to the brightness reading;
and adjusting, namely adjusting the display brightness of each display partition of the display panel to be the same according to the gain control map.
6. The backlight adjustment method according to claim 5, wherein the generating step specifically comprises:
a first generation sub-step of generating a partitioned luminance reading map from the luminance readings;
a second generation substep, namely performing normalization processing on the subarea brightness reading map to obtain a subarea brightness data map;
and a third generation substep, generating a gain control map according to the numerical value in the partition brightness data map and a first preset formula.
7. The backlight adjustment method according to claim 5, wherein the obtaining step specifically comprises:
an obtaining sub-step, obtaining a plurality of brightness readings to be weighted of each display partition of the display panel;
and a calculation substep, performing weighted calculation on the plurality of brightness readings to be weighted according to a second preset formula to obtain the brightness readings.
8. The backlight adjustment method according to claim 5, wherein the display panel comprises a backlight driving circuit, and the adjusting step specifically comprises:
and a first adjusting substep, adjusting the first driving strength of the backlight driving circuit according to the gain control map, so that the brightness of the backlight source corresponding to each display partition of the display panel is consistent, and the display brightness of each display partition of the display panel is controlled to be the same.
9. The backlight adjustment method according to claim 5, wherein the display panel comprises a pixel driving circuit, and the adjusting step specifically comprises:
and a second adjustment substep of adjusting the pixel transmittance of each display partition of the display panel by adjusting a second driving strength of the pixel driving circuit according to the gain control map, thereby controlling the display brightness of each display partition of the display panel to be the same.
10. The backlight adjusting method according to any one of claims 8 to 9, wherein the first driving strength and/or the second driving strength corresponding to each display partition of the display panel are/is the same before the adjusting step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011404265.XA CN112530376A (en) | 2020-12-03 | 2020-12-03 | Display panel and backlight adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011404265.XA CN112530376A (en) | 2020-12-03 | 2020-12-03 | Display panel and backlight adjusting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112530376A true CN112530376A (en) | 2021-03-19 |
Family
ID=74997475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011404265.XA Pending CN112530376A (en) | 2020-12-03 | 2020-12-03 | Display panel and backlight adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112530376A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345381A (en) * | 2021-04-23 | 2021-09-03 | 安徽康佳电子有限公司 | Method and system for enhancing contrast ratio of liquid crystal display |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908748A (en) * | 2005-08-05 | 2007-02-07 | 三星电子株式会社 | Backlight unit, display apparatus comprising the same and control method thereof |
| CN1908746A (en) * | 2005-08-05 | 2007-02-07 | 日本电气株式会社 | Display device, method, and terminal device having switchable viewing angle |
| CN101159121A (en) * | 2007-11-20 | 2008-04-09 | 京东方科技集团股份有限公司 | Back-light source control system and method |
| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
| CN101295084A (en) * | 2007-04-25 | 2008-10-29 | 北京京东方光电科技有限公司 | Back light source brightness automatic regulating system and method |
| CN101661725A (en) * | 2008-08-25 | 2010-03-03 | 株式会社日立制作所 | Image display apparatus |
| US20110141154A1 (en) * | 2009-12-11 | 2011-06-16 | Hee-Won Ahn | Local dimming driving method and device of liquid crystal display device |
| KR20150028542A (en) * | 2013-09-06 | 2015-03-16 | 삼성디스플레이 주식회사 | Liquid crystal display device |
| US20190086702A1 (en) * | 2016-12-27 | 2019-03-21 | HKC Corporation Limited | Liquid crystal display device and driving method thereof |
-
2020
- 2020-12-03 CN CN202011404265.XA patent/CN112530376A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908748A (en) * | 2005-08-05 | 2007-02-07 | 三星电子株式会社 | Backlight unit, display apparatus comprising the same and control method thereof |
| CN1908746A (en) * | 2005-08-05 | 2007-02-07 | 日本电气株式会社 | Display device, method, and terminal device having switchable viewing angle |
| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
| CN101295084A (en) * | 2007-04-25 | 2008-10-29 | 北京京东方光电科技有限公司 | Back light source brightness automatic regulating system and method |
| CN101159121A (en) * | 2007-11-20 | 2008-04-09 | 京东方科技集团股份有限公司 | Back-light source control system and method |
| CN101661725A (en) * | 2008-08-25 | 2010-03-03 | 株式会社日立制作所 | Image display apparatus |
| US20110141154A1 (en) * | 2009-12-11 | 2011-06-16 | Hee-Won Ahn | Local dimming driving method and device of liquid crystal display device |
| KR20150028542A (en) * | 2013-09-06 | 2015-03-16 | 삼성디스플레이 주식회사 | Liquid crystal display device |
| US20190086702A1 (en) * | 2016-12-27 | 2019-03-21 | HKC Corporation Limited | Liquid crystal display device and driving method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345381A (en) * | 2021-04-23 | 2021-09-03 | 安徽康佳电子有限公司 | Method and system for enhancing contrast ratio of liquid crystal display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109903733B (en) | Display device and driving method thereof | |
| JP5232957B2 (en) | Method and apparatus for driving liquid crystal display device, and liquid crystal display device | |
| CN108538260A (en) | Image display processing method and device, display device and storage medium | |
| TW201225051A (en) | Liquid crystal display and scanning backlight driving method thereof | |
| TW201333923A (en) | Display apparatus and driving method thereof | |
| RU2502101C2 (en) | Display device | |
| CN108615511B (en) | Display method and display device | |
| JP2006018284A (en) | Liquid crystal display and driving method thereof | |
| WO2014180042A1 (en) | Dark spot repairing method of liquid crystal display panel and liquid crystal display panel | |
| WO2019085667A1 (en) | Display device and display driving method | |
| RU2449334C1 (en) | Display device and television receiver | |
| US20060044828A1 (en) | Display device, driving device of display device, and driving device of light source for display device | |
| CN112530376A (en) | Display panel and backlight adjusting method thereof | |
| CN108877717A (en) | A kind of image retention removing method of liquid crystal display panel | |
| CN110873982A (en) | Digital backlight source system and control method thereof, liquid crystal display device and control method thereof | |
| CN103680425A (en) | Luminance control device of backlight source, backlight source and display device | |
| US20210304683A1 (en) | Brightness adjustment method, dimming device, and display panel | |
| US8441471B2 (en) | Light source device and display device including the same | |
| CN114242012B (en) | Backlight module, display panel, display control method of display panel and display device | |
| US11817060B2 (en) | Display panel and display method thereof | |
| CN111754952B (en) | Display control method and device | |
| TWI253048B (en) | Brightness compensation and image quality correction method capable of increasing contrast of screen and LCD device using the same | |
| US9091870B2 (en) | Illuminance adjusting method of liquid crystal photo alignment irradiation machine | |
| CN101923260A (en) | Liquid crystal display | |
| US7736011B2 (en) | Liquid crystal display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210319 |
|
| RJ01 | Rejection of invention patent application after publication |