CN116110347A - Display device and electronic apparatus - Google Patents

Display device and electronic apparatus Download PDF

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Publication number
CN116110347A
CN116110347A CN202211574422.0A CN202211574422A CN116110347A CN 116110347 A CN116110347 A CN 116110347A CN 202211574422 A CN202211574422 A CN 202211574422A CN 116110347 A CN116110347 A CN 116110347A
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CN
China
Prior art keywords
backlight
display device
controller
brightness
partition
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Pending
Application number
CN202211574422.0A
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Chinese (zh)
Inventor
郭小颖
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TCL Huaxing Photoelectric Technology Co Ltd
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TCL Huaxing Photoelectric Technology Co Ltd
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Publication date
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Priority to CN202211574422.0A priority Critical patent/CN116110347A/en
Publication of CN116110347A publication Critical patent/CN116110347A/en
Pending legal-status Critical Current

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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
    • G09G3/342—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application discloses a display device and electronic equipment, the display device includes a backlight module, a time sequence controller, a system on chip and a cloud server, backlight compensation data are obtained from the cloud server through the time sequence controller or the system on chip, and not only can backlight brightness of each backlight partition be controlled to be the same, but also uniformity of the backlight brightness is improved; in addition, the backlight compensation data is directly from the cloud server, and temporary storage in the display device is not needed, so that a corresponding memory is not needed to be newly added in the display device, and the uniformity of backlight brightness can be improved under the condition that the existing configuration of the display device is not changed.

Description

Display device and electronic apparatus
Technical Field
The application relates to the technical field of display, in particular to a display device and electronic equipment.
Background
Most of backlight modules adopt light emitting diodes to provide required backlight brightness, however, the backlight brightness is affected by various factors, and uneven brightness of the backlight module is easily caused.
Disclosure of Invention
The application provides a display device and electronic equipment to alleviate the technical problem that backlight brightness homogeneity is relatively poor.
In a first aspect, the present application provides a display device, the display device including a backlight module, a timing controller, a system on a chip, and a cloud server, the backlight module including a plurality of backlight partitions; the time schedule controller is connected with the backlight module; the system on chip is connected with the time sequence controller; the cloud server is communicatively connected to the system on a chip or the timing controller to provide backlight compensation data that causes the backlight brightness of each backlight partition to be the same.
In some embodiments, the timing controller superimposes the backlight compensation data of each backlight partition onto the corresponding initial backlight brightness data to obtain brightness data of the backlight cursor of each backlight partition; and the backlight module controls each backlight partition to have the same backlight brightness according to the brightness data of the backlight cursor of each backlight partition.
In some embodiments, the backlight module further includes a driving circuit, the driving circuit includes driving sub-circuits having the same number as the backlight partitions, an output terminal of each driving sub-circuit is connected to a corresponding backlight partition, and an input terminal of each driving sub-circuit is connected to the timing controller.
In some embodiments, a string of lights is provided in each backlight partition, the positive pole of the string of lights is connected to the positive power signal line, and the negative pole of the string of lights is connected to the output of a driving sub-circuit.
In some embodiments, the driving sub-circuit includes a controller, a control transistor, and a register, wherein an input terminal of the controller is connected with the timing controller to receive brightness data of a backlight cursor of each backlight partition; the grid electrode of the control transistor is connected with the first output end of the controller, and one of the source electrode or the drain electrode of the control transistor is connected with the negative electrode of the light string; the control end of the register is connected with the second output end of the controller, the input end of the register is connected with the other one of the source electrode and the drain electrode of the control transistor, and the output end of the register is connected with the negative power signal line.
In some embodiments, the control transistor is an N-channel transistor, and the first output terminal of the controller controls the on-time of the control transistor in one frame according to the brightness data of the backlight cursor.
In some embodiments, the second output of the controller is configured to provide current data to the register, the current data being configured to control the lighting current through the light string.
In some embodiments, the light string comprises a plurality of light emitting devices connected in series, wherein the light emitting devices are micro light emitting diodes.
In some embodiments, the display device further includes a liquid crystal display panel, and the liquid crystal display panel is connected to the timing controller and disposed on the light emitting side of the backlight module.
In a second aspect, the present application provides an electronic device, which includes the display device in at least one embodiment described above.
According to the display device and the electronic equipment, the backlight compensation data are obtained from the cloud server through the time sequence controller or the system on chip, so that the backlight brightness of each backlight partition can be controlled to be the same, and the uniformity of the backlight brightness is improved; in addition, the backlight compensation data is directly from the cloud server, and temporary storage in the display device is not needed, so that a corresponding memory is not needed to be newly added in the display device, and the uniformity of backlight brightness can be improved under the condition that the existing configuration of the display device is not changed.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a structure of backlight brightness unevenness in the related art.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a backlight partition and driving circuit according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of backlight brightness uniformity according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more of such features, and in the description of the present invention, "a plurality" means two or more, unless otherwise specifically limited.
Fig. 1 is a schematic diagram of a related art backlight with uneven brightness, as shown by three dashed boxes, each dashed box represents a backlight partition, and each backlight partition has four light emitting devices distributed in an array, and the light emitting devices can be further divided into Micro Light Emitting Diodes (MLEDs) and Mini light emitting diodes (Mini-LEDs).
Compared with the traditional Mini-LED backlight, the MLED backlight has a Local dimming function, and can achieve high contrast and high brightness. The MLED lamp is a current sensitive device, so that the MLED backlight has high current precision requirements for Driver ICs (driving circuits or driving chips), but because of the influence of the design and manufacturing processes of the Driver ICs, the currents of different output channels (channels) of a single Driver IC have different values, when the current differences are large, uneven brightness and darkness can be caused, and the display effect can be seriously influenced by the lamp panels with uneven brightness and darkness.
In view of this, the present embodiment provides a display device, referring to fig. 2 to 4, as shown in fig. 2, the display device includes a backlight module 100, a timing controller 200, a system on a chip 300 and a cloud server 400, wherein the backlight module 100 includes a plurality of backlight partitions 110; the time schedule controller 200 is connected with the backlight module 100; the system on chip 300 is connected with the timing controller 200; the cloud server 400 is communicatively connected to the system on chip 300 or the timing controller 200 to provide backlight compensation data such that the backlight brightness of each backlight partition 110 is the same.
It can be understood that, in the display device provided in this embodiment, the backlight compensation data is obtained from the cloud server 400 through the timing controller 200 or the system on chip 300, so that the backlight brightness of each backlight partition 110 can be controlled to be the same, which improves the uniformity of the backlight brightness; in addition, since the backlight compensation data is directly from the cloud server 400 and does not need to be temporarily stored in the display device, a corresponding memory is not required to be newly added in the display device, and thus the uniformity of the backlight brightness can be improved without changing the existing configuration of the display device.
It should be noted that the system on chip 300 may be a main control board of the display device.
In one embodiment, the timing controller 200 superimposes the backlight compensation data of each backlight partition 110 onto the corresponding initial backlight brightness data to obtain the brightness data of the backlight cursor of each backlight partition 110; the backlight module 100 controls each backlight partition 110 to have the same backlight brightness according to the brightness data of the backlight cursor of each backlight partition 110.
The backlight compensation data is used to compensate for uneven brightness due to the difference in the transmission path of the backlight initial brightness data.
In one embodiment, as shown in fig. 2 and 3, the backlight module 100 further includes a driving circuit 120, the driving circuit 120 includes driving sub-circuits 121 with the same number as the backlight partitions 110, an output terminal of each driving sub-circuit 121 is connected to a corresponding backlight partition 110, and an input terminal of each driving sub-circuit 121 is connected to the timing controller 200.
It should be noted that, although the structure of each driving sub-circuit 121 is the same, there may be a difference in design or process in the manufacturing process, and thus, when each driving sub-circuit 121 processes the same backlight initial luminance data, different results may be output. It is for this reason that the corresponding brightness compensation data is provided for each driving sub-circuit 121 or each output channel of the driving chip to compensate for differences in design or process, etc., and to achieve that each backlight distribution has the same backlight brightness.
In one embodiment, as shown in fig. 2 and 3, a light string 111 is disposed in each backlight partition 110, the positive electrode of the light string 111 is connected to the positive power signal line, and the negative electrode of the light string 111 is connected to the output terminal of a driving sub-circuit 121.
It should be noted that, each light string 111 includes a plurality of light emitting devices connected in series, for example, 2 light emitting devices connected in series, 4 light emitting devices connected in series, or 8 light emitting devices connected in series. The light emitting device may be, but not limited to, a micro light emitting diode, or a mini light emitting diode.
Wherein the power supply positive signal line is for transmitting a positive power supply signal VLED.
In one embodiment, as shown in fig. 2 and 3, the driving sub-circuit 121 includes a controller 1211, a control transistor and a register 1212, wherein an input terminal of the controller 1211 is connected to the timing controller 200 to receive the brightness data of the backlight cursor of each backlight partition 110; the gate of the control transistor is connected to a first output terminal of the controller 1211, and one of the source or drain of the control transistor is connected to the negative electrode of the light string 111; a control terminal of the register 1212 is connected to a second output terminal of the controller 1211, an input terminal of the register 1212 is connected to the other of the source or the drain of the control transistor, and an output terminal of the register 1212 is connected to a power negative signal line.
As shown in fig. 3, PWM is a square wave signal, and the duty ratio thereof can adjust the on time of the control transistor in one frame, and the longer the on time in one frame, the greater the backlight brightness of the backlight partition 110. A control terminal of the register 1212 is connected to a second output terminal of the controller 1211, and is capable of receiving current data, idata, from the controller 1211, which may be separated from the luminance data of the backlight target in the controller 1211. That is, the second output terminal of the controller 1211 is used to provide current data to the register 1212, which is used to control the light emitting current flowing through the light string 111. The first output terminal of the controller 1211 controls the on time of the control transistor in one frame according to the luminance data of the back cursor.
Wherein the power negative signal line is used for transmitting a negative power signal GND.
The control transistor may be, but not limited to, an N-channel transistor or a P-channel transistor.
Wherein, PWM may control the backlight brightness of one backlight partition 110 alone, idata may control the backlight brightness of one backlight partition 110 alone, or PWM, idata may control the backlight brightness of one backlight partition 110 together.
In one embodiment, the display device further includes a liquid crystal display panel, which is connected to the timing controller 200 and disposed on the light emitting side of the backlight module 100.
Fig. 4 is a schematic structural diagram of backlight luminance uniformity provided in the embodiment of the present application, the upper diagram in fig. 4 is a schematic overall luminance display diagram of the backlight module 100 and the lcd panel, the peripheral black frame represents the frame, the middle white area represents the effective display area, and it can be seen that after the adjustment in at least one embodiment, the uniformity of backlight luminance of each backlight distribution is significantly improved compared with that in fig. 1. The lower graph in fig. 4 shows the distribution of backlight brightness in a certain area of the backlight module 100, and it can also be seen that the backlight brightness of each light emitting device in the area is quite uniform.
It should be noted that the above backlight compensation data is obtained as follows:
in the algorithm debugging process, the backlight partitions 110 with uneven brightness are corrected. Assuming that there are 100 backlight partitions 110, there are a backlight partition 1101 and a backlight partition 1102 that are exploded, there is a backlight partition 1103 that is darker, and the remaining 97 backlight partitions 110 are normal brightness. The SPI (serial interface) signal from the timing controller 200 can change the current level of each channel of each Driver IC. Assuming that the 16-bit SPI signal transmitted by the timing controller 200 has 6-bit current data and 10-bit PWM data, when the current data of 97 normally light-emitting backlight partitions 110 are 001010, the current data transmitted by the timing controller 200 to the burst backlight partition 1101 and the backlight partition 1102 is adjusted to 001000 by changing the SPI signal transmitted by the timing controller 200, so that the burst backlight partition 1101 and the backlight partition 1102 are darkened; and adjusts the current data transmitted by timing controller 200 to darker backlight partition 1103 to 001011 to illuminate. Since the backlight compensation data of each driving sub-circuit 121 or each output channel of the driving chip is unique, and the backlight module 100 does not have a Flash (Flash) for storing the backlight compensation data, the scheme shown in fig. 2 is adopted to propose that the debugged backlight compensation data exists in the cloud server 400, so as to save the hardware cost required by the display device.
In one embodiment, the present embodiment provides an electronic device including the display apparatus in at least one embodiment.
It can be understood that, since the electronic device provided in the present embodiment includes the display device in at least one embodiment, the electronic device can also obtain the backlight compensation data from the cloud server 400 through the timing controller 200 or the system on chip 300, so that not only the backlight brightness of each backlight partition 110 can be controlled to be the same, which improves the uniformity of the backlight brightness; in addition, since the backlight compensation data is directly from the cloud server 400 and does not need to be temporarily stored in the display device, a corresponding memory is not required to be newly added in the display device, and thus the uniformity of the backlight brightness can be improved without changing the existing configuration of the display device.
In summary, in the display device provided in the above embodiments, when the backlight module 100 is found to have a distinct brightness non-uniformity phenomenon, the display device does not need to be manufactured again, and through algorithm debugging, the brightness non-uniformity phenomenon is compensated, and the backlight compensation data is stored in the cloud server 400 (without additional registers), so that the brightness non-uniformity phenomenon of the MLED backlight module 100 can be improved, the time for re-sending the parts can be reduced, and the time and money cost of Driver ICs with higher importing precision can be reduced.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The display device and the electronic device provided by the embodiments of the present application are described in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, where the description of the above embodiments is only for helping to understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A display device, characterized in that the display device comprises:
the backlight module comprises a plurality of backlight partitions;
the time sequence controller is connected with the backlight module;
the system on chip is connected with the time sequence controller;
and the cloud server is in communication connection with the system on chip or the time schedule controller so as to provide backlight compensation data enabling the backlight brightness of each backlight partition to be the same.
2. The display device of claim 1, wherein the timing controller superimposes the backlight compensation data of each backlight partition onto the corresponding backlight initial luminance data to obtain luminance data of a backlight cursor of each backlight partition;
and the backlight module controls each backlight partition to have the same backlight brightness according to the brightness data of the backlight cursor of each backlight partition.
3. The display device of claim 2, wherein the backlight module further comprises a driving circuit, the driving circuit comprises driving sub-circuits with the same number as the backlight partitions, an output end of each driving sub-circuit is connected with a corresponding backlight partition, and an input end of each driving sub-circuit is connected with the timing controller.
4. A display device as claimed in claim 3, characterized in that a string of lights is provided in each of the backlight partitions, the positive pole of the string of lights being connected to a positive power signal line, the negative pole of the string of lights being connected to an output of one of the driving sub-circuits.
5. The display device of claim 4, wherein the drive sub-circuit comprises:
the input end of the controller is connected with the time sequence controller to receive brightness data of the back cursors of the backlight partitions;
a control transistor, wherein a grid electrode of the control transistor is connected with a first output end of the controller, and one of a source electrode or a drain electrode of the control transistor is connected with a negative electrode of the light string;
the control end of the register is connected with the second output end of the controller, the input end of the register is connected with the other one of the source electrode or the drain electrode of the control transistor, and the output end of the register is connected with a negative power signal line.
6. The display device according to claim 5, wherein the control transistor is an N-channel transistor, and the first output terminal of the controller controls the on time of the control transistor in one frame according to the luminance data of the back cursor.
7. The display device of claim 5, wherein the second output of the controller is configured to provide current data to the register, the current data being configured to control a lighting current through the light string.
8. The display device of claim 4, wherein the light string comprises a plurality of light emitting devices in series, the light emitting devices being micro light emitting diodes.
9. The display device according to any one of claims 1 to 8, further comprising a liquid crystal display panel connected to the timing controller and disposed on a light emitting side of the backlight module.
10. An electronic device comprising the display device according to any one of claims 1-8.
CN202211574422.0A 2022-12-08 2022-12-08 Display device and electronic apparatus Pending CN116110347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211574422.0A CN116110347A (en) 2022-12-08 2022-12-08 Display device and electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211574422.0A CN116110347A (en) 2022-12-08 2022-12-08 Display device and electronic apparatus

Publications (1)

Publication Number Publication Date
CN116110347A true CN116110347A (en) 2023-05-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211574422.0A Pending CN116110347A (en) 2022-12-08 2022-12-08 Display device and electronic apparatus

Country Status (1)

Country Link
CN (1) CN116110347A (en)

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