WO2015176334A1 - 背光模组、显示装置及其驱动方法 - Google Patents

背光模组、显示装置及其驱动方法 Download PDF

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Publication number
WO2015176334A1
WO2015176334A1 PCT/CN2014/079016 CN2014079016W WO2015176334A1 WO 2015176334 A1 WO2015176334 A1 WO 2015176334A1 CN 2014079016 W CN2014079016 W CN 2014079016W WO 2015176334 A1 WO2015176334 A1 WO 2015176334A1
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WO
WIPO (PCT)
Prior art keywords
partition
backlight module
backlights
light source
backlight
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.)
Ceased
Application number
PCT/CN2014/079016
Other languages
English (en)
French (fr)
Inventor
樊勇
康志聪
张简圣哲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/406,687 priority Critical patent/US20160260389A1/en
Publication of WO2015176334A1 publication Critical patent/WO2015176334A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0237—Switching ON and OFF the backlight within one frame
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module, a display device, and a driving method thereof.
  • liquid crystal displays LCDs
  • FSC Field Sequential Color
  • the display principle of the existing FSC liquid crystal display is to divide each frame image into three color fields which are sequentially displayed.
  • the backlight module emits only red light and drives the liquid crystal module to display the red portion of the frame image; in the second color field, the backlight module emits only green light and is driven by The liquid crystal module displays the green portion of the image of the frame; in the third color field, the backlight module emits only blue light and drives the liquid crystal module to display the blue portion of the frame image.
  • the three color fields can be combined into the frame image.
  • An object of the present invention is to provide a backlight module, a display device and a driving method thereof, which solve the technical problem that a color crack phenomenon occurs in the existing FSC liquid crystal display.
  • the present invention provides a backlight module including a controller and a plurality of partition backlights, wherein
  • Each of the partition backlights includes at least two independently driven different color light sources
  • the controller controls an open time of each of the different colored light sources in each of the zoned backlights.
  • each of the partition backlights includes a red light source, a blue light source, and a green phosphor disposed around the blue light source.
  • the green phosphor is a sulfide phosphor, an aluminate phosphor, a phosphate phosphor, a borate phosphor, a silicate phosphor, an oxynitride phosphor or a quantum dot phosphor.
  • each of the partition backlights includes a red light source, a blue light source, and a green light source.
  • the partition backlight has a rectangular shape.
  • the partition backlights are arranged in an array.
  • the number of the partition backlights is between 200 and 36864.
  • the invention also provides a display device comprising a liquid crystal module and the above-mentioned backlight module.
  • the liquid crystal module includes a plurality of pixel units, each of the pixel units including a colorless sub-pixel, a green sub-pixel, and a blue sub-pixel;
  • a colorless filter layer or a filter layer is disposed in the colorless sub-pixel, a green filter layer is disposed in the green sub-pixel, and a blue filter layer is disposed in the blue sub-pixel.
  • the display device further includes:
  • An image information processing unit configured to determine, according to a frame image to be displayed by the display device, an opening time of each light source of different colors in the backlight of the backlight module in the board, and the liquid crystal module Driving voltage of each sub-pixel unit in the middle;
  • the display device further includes a clock controller for time matching the signal processor and the controller in the backlight module.
  • the present invention also provides a driving method of the above display device, in a frame image displayed by the display device; determining, by the image information processing unit, each color of each of the backlights of the backlight module according to the frame image The opening time of the light source in the frame, and the driving voltage of each sub-pixel unit in the liquid crystal module;
  • each partition back of the backlight module based on the determined opening Light sources of different colors in the light; each sub-pixel unit in the liquid crystal module is driven by the signal processor based on the determined driving voltage.
  • the present invention brings the following beneficial effects:
  • the backlight module provided by the present invention, in the display process, an image of a frame to be displayed may be first divided into a plurality of partition images, and each of the partition images and the backlight module One partition backlight corresponds one by one.
  • the controller in the backlight module controls the opening time of the light sources of different colors in each partition backlight in this frame, that is, controls the duty ratio of the light sources of different colors in this frame to control each partition.
  • each partition backlight controls the duty ratio of the light source of different colors according to the corresponding partition image, thereby reducing the power consumption of the backlight module and improving the utilization ratio of the backlight.
  • the corresponding partition backlight only needs to open a light source of one color, thereby more significantly reducing the power consumption of the backlight module and improving the utilization of the backlight.
  • the backlight module provided by the present invention, in the process of displaying one frame of image, only the liquid crystal module is driven once, and the utilization rate of the light is improved, and the display mode of the FSC is not used, thereby solving the problem.
  • the existing FSC display method has a technical problem of color cracking.
  • FIG. 1 is a schematic diagram of a backlight module according to Embodiment 1 of the present invention
  • 2 is a schematic diagram of a partitioning backlight in a backlight module according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a display device according to a first embodiment of the present invention
  • FIG. 5 is a schematic diagram of a partition backlight in a backlight module according to Embodiment 2 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • an embodiment of the present invention provides a backlight module 10 including a controller and a plurality of partitioned backlights 2 (the controllers can generally be disposed under the partition backlight, so the controller is not shown in FIG. 1).
  • the shape of the partition backlight 2 is preferably a rectangle, and each of the partition backlights 10 has the same shape and size.
  • the partition backlights 2 can be arranged in an array and can range from 200 to 36,864. For example, if there are 600 partition backlights 2, they can be arranged in an array of 30 X 20.
  • the backlight module 10 should be in an ultra high definition (UD) television with a resolution of 3840 X 2160, and the number of the partition backlights 2 can be 36,864, and the array can be arranged in an array of 256 X 144.
  • UD ultra high definition
  • a backlight of only 225 ( 15 X 15 ) pixel units is implemented for each partition backlight 2 .
  • each of the zone backlights includes at least two independently driven, differently colored light sources.
  • each of the partition backlights 2 includes a red light source 2R, a blue light source 2B, and a green phosphor powder 20G disposed around the blue light source.
  • both the red light source 2R. and the blue light source 2B are preferably LEDs.
  • the green phosphor 20G may be a sulfide phosphor, a citrate phosphor, a phosphate phosphor, a borate phosphor, a silicate phosphor, an oxynitride phosphor or a quantum dot phosphor.
  • the controller is used to control the turn-on time of the light sources of different colors in each of the partition backlights.
  • the controller can be used to control the opening time of the red light source 2R and the blue light source 2B in the partition backlight in one frame time, that is, to control the red light source 2R. and the blue light source 2B in a frame.
  • the empty ratio it is possible to control the chromaticity and brightness of each of the partition backlights 2 during the frame time, so that each of the partition backlights 2 can have different chromaticities and brightness.
  • the present invention also provides a display device, which may be a liquid crystal television, a liquid crystal display, a mobile phone, a tablet computer, etc., and the display device includes a liquid crystal module and the backlight module provided by the embodiment of the present invention.
  • a display device which may be a liquid crystal television, a liquid crystal display, a mobile phone, a tablet computer, etc.
  • the display device includes a liquid crystal module and the backlight module provided by the embodiment of the present invention.
  • the liquid crystal module 30 includes a plurality of pixel units, and each of the pixel units includes a colorless sub-pixel ⁇ , a green sub-pixel G, and a blue sub-pixel ⁇ .
  • the colorless sub-pixel ⁇ is provided with a colorless filter layer 3 ⁇ or no filter layer
  • the green sub-pixel G is provided with a green filter layer 3G
  • the blue sub-pixel B is provided with a blue filter.
  • Layer 3B The light emitted by the red light source 2R, the blue light source 2B, and the green phosphor 20G in the partition backlight 2 passes through the light-mixing member such as the diffusion sheet 1 1 and the prism sheet 12 in the backlight module 10, and then enters the liquid crystal module 30.
  • the blue sub-pixel B can transmit blue light
  • the green sub-pixel G can transmit green light
  • the achromatic sub-pixel T can transmit light of all colors. Since the clear sub-pixel T can transmit light of all colors, the transmittance of the entire liquid crystal module 30 and the utilization of the backlight can be improved, and the brightness of the displayed image can be improved.
  • the display device provided by the embodiment of the present invention further includes an image information processing unit 4 and a signal processor 5.
  • the image information processing unit 4 is configured to determine, according to a frame image to be displayed by the display device, an opening time of the red light source and the blue light source in the backlight of each of the backlights of the backlight module 10, and each of the liquid crystal modules 30.
  • the controller 13 in the backlight module 10 can open the red light source and the blue light source in each of the partition backlights of the backlight module 10 according to the determined opening time, so that each of the partition backlights can have different colors. Degree and brightness.
  • the signal processor 5 drives each sub-pixel unit in the liquid crystal module 30 according to the determined driving voltage, so that the light emitted by the backlight module 10 passes through the liquid crystal module 30, and the frame image can be displayed.
  • the display device further includes a clock controller 6 for performing B-inch matching between the signal processor 5 and the controller 13 in the backlight module 10 to ensure the light emitted by the backlight module 10
  • the driving of the liquid crystal module 30 is performed on the same frame image.
  • the driving method of the display device provided by the embodiment of the present invention is: in a frame image displayed by the display device: first, determining, according to the frame image, a red light source and a blue light source in each of the partition backlights of the backlight module in the frame The opening time in the middle, and the driving voltage of each sub-pixel unit in the liquid crystal module.
  • the frame image may be divided into thousands of partition images by the image information processing unit 4, and each of the partition images is in one-to-one correspondence with each partition backlight of the backlight module 10.
  • the image information processing unit 4 determines, according to each of the partition images, an opening time of the red light source and the blue light source in the corresponding backlight in the frame, that is, controlling the duty of the red light source and the blue light source in the frame.
  • the chromaticity and brightness of each partition backlight can be close to its corresponding partition image.
  • the partition backlight 2 includes a red light source 2R, a blue light source 2B (and a green phosphor 20G), as shown in FIG.
  • a partition image contains more red, and blue and green are less, then In the partition backlight 2 corresponding to the partition image, the red light source 2R is opened longer, and the blue light source 2B is shorter, that is, the red light source 2R has a larger duty ratio, and the blue light source 2B is occupied. smaller. If a certain partition image is a single red (or only red with different gray scales), in the partition backlight 2 corresponding to the partition image, only the red light source 2R can be turned on, and the blue light source 2B does not need to be turned on, that is, The duty ratio of the red light source 2R is 1, and the duty ratio of the blue light source 2B is zero. This makes it possible to significantly reduce the power consumption of the blue light source 2B in the zone backlight 2, and also avoid the loss of blue light.
  • the duty ratio of the red light source 2R and the duty ratio of the blue light source 2B are independent of each other, and the sum of the duty ratios of the two is not necessarily equal to one.
  • the duty ratio of the red light source 2R and the duty ratio of the blue light source 2 ⁇ may both be equal to 1: when a certain partition image is black In the partition backlight 2 corresponding thereto, the duty ratio of the red light source 2R and the duty ratio of the blue light source 2 ⁇ may all be equal to zero.
  • the image information processing unit 4 also determines the driving voltage of each sub-pixel unit in the liquid crystal module 30 based on the respective partition images and the chromaticity and brightness of the corresponding partition backlight. Then, according to the opening time of the red light source and the blue light source in the frame backlight in each of the partition backlights determined by the image information processing unit 4, the red light source and the blue light source in each partition of the backlight module are turned on.
  • the controller 3 in the backlight module 10 controls the red light source and the blue light source in each of the partition backlights to open between B and B in the frame time, that is, the red light source and the blue light source are within the frame time.
  • the duty cycle which controls the chrominance and brightness of each partition backlight, enables the chrominance and brightness of each partition backlight to be close to its corresponding partition image. Since the chromaticity and brightness of each partition backlight are close to the corresponding partition image, the light emitted by the entire backlight module 10 composed of the backlights of the respective partitions has formed a picture before passing through the liquid crystal module 30. A more blurred image, - the more blurred image is close to the frame image to be displayed.
  • the signal processor 5 drives each sub-pixel unit in the liquid crystal module 30 according to the driving voltage of each sub-pixel unit determined by the image information processing unit 4, so that the light emitted by each of the partition backlights passes through the liquid crystal module 30. Can display the corresponding partition image.
  • each partition image can form a complete image of one frame, thereby realizing the display of the image.
  • the image information processing unit 4 may first divide the image to be displayed into thousands of partition images, and each partition image and each partition of the backlight module 10 The backlights correspond one-to-one.
  • the image information processing unit 4 determines the duty ratio of the red light source and the blue light source in the corresponding partition backlight during the frame time and the driving voltage of each sub-pixel unit in the liquid crystal module 30 according to each partition image.
  • the controller 13 in the backlight module 10 controls the duty ratio of the red light source and the blue light source in this frame backlight in this frame according to the duty ratio determined by the image information processing unit 4 to control each partition backlight.
  • the chromaticity and brightness make the chromaticity and brightness of each partition backlight close to its corresponding partition image.
  • the light emitted by the entire backlight module 10 composed of the backlights of the respective partitions has formed a blurred image close to the image of the frame to be displayed before passing through the liquid crystal module 30.
  • the signal processor 5 drives each sub-pixel unit in the liquid crystal module 30 according to the driving voltage determined by the image information processing unit 4, so that the light emitted by each of the partition backlights can be displayed after passing through the liquid crystal module 30.
  • the corresponding partition image In this way, each partition image can form a complete image of one frame, thereby realizing the display of the image.
  • each partition backlight controls the duty ratio of the red light source and the blue light source according to the corresponding partition image, thereby reducing the power consumption of the backlight module and improving the utilization of the backlight. rate.
  • the partition image is a single color (or only a single color with different gray levels)
  • the corresponding partition backlight only needs to open a light source of one color, thereby significantly reducing the power consumption of the backlight module and improving the backlight. Utilization rate.
  • the more the number of partitioned backlights the smaller the area of each partition backlight, and the smaller the area of the corresponding partition image, the easier it is to have a single color (or only a single color with different gray levels). Partitioning the image, which can reduce the power consumption of the backlight module to a greater extent and improve the utilization of the backlight.
  • the backlight module provided by the present invention, in the process of displaying one frame of image, only the liquid crystal module is driven once, and the utilization of the FSC is not adopted while improving the utilization of light, thereby solving the problem.
  • each frame image is divided into three color fields. If the liquid crystal display needs to be displayed at a 60 Hz drama rate, the actual refresh rate is 180 Hz. However, the display device provided by the embodiment of the present invention does not adopt the display mode of the FSC. If the display is required to be displayed at a 60 Hz playback rate, the actual refresh rate is still 60 Hz. Therefore, the display device provided by the present invention is for stripping new The requirement of the rate is lower, and the response speed (response time) of the liquid crystal is also lower. Therefore, the display device provided by the embodiment of the invention has lower cost and is easier to use In-Plane Switching (IPS). , Vertical Alignment (VA), Twisted Nemaiic (TN) and other modes are implemented.
  • IPS In-Plane Switching
  • the backlight module provided in the embodiment of the present invention is substantially the same as the backlight module provided in the first embodiment, and the difference is that, in the backlight module 10 provided in this embodiment, each of the partition backlights 2 includes Independently driven red light Source 2R, blue light source 2B, and green light source 2G.
  • the controller (not shown) of the backlight module 10 can control the duty ratio of the red light source 2R, the blue light source 2B and the green light source 2G in the partition backlight 2 within one frame, thereby controlling each partition backlight. 2
  • the chrominance and brightness during the frame time enables each of the zone backlights 2 to have different chromaticities and brightness.
  • the display device provided by the embodiment of the invention includes a backlight module and a liquid crystal module.
  • the backlight module is the same as the backlight module provided in the embodiment; and the liquid crystal module is the same as the liquid crystal module in the first embodiment, and each pixel unit of the liquid crystal module includes a clear sub-pixel and a green sub-pixel. And blue subpixels.
  • the display device provided by the embodiment of the present invention further includes an image information processing unit, a signal processor and a clock controller, and the functions and driving methods thereof are basically the same as those in the first embodiment.
  • the specific driving method is: in one frame image displayed by the display device:
  • the frame image is divided into a plurality of partition images by the image information processing unit, and each of the partition images is in one-to-one correspondence with each of the partition backlights of the backlight module.
  • the red light source 2R has a larger duty ratio in the partition backlight 2 corresponding to the partition image.
  • the blue light source 2B and the green light source 2G have a small duty ratio. If a certain partition image is a single red (or only red with different gray scales), in the partition backlight 2 corresponding to the partition image, only the red light source 2R can be played, without opening the blue light source 2B and The green light source 2G, that is, the red light source 2R has a duty ratio of 1, and the blue light source 2B and the green light source 2G have a duty ratio of zero. This significantly reduces the power consumption of the blue light source 2B and the green light source 2G in the zone backlight 2, and also avoids the loss of blue light and green light.
  • the image information processing unit determines the driving voltage of each sub-pixel unit in the liquid crystal module according to the respective partition images and the chromaticity and brightness of the corresponding partition backlight.
  • the red light source and the blue light source in each partition of the backlight module are turned on. Green light source.
  • the controller in the backlight module controls the duty ratio of the red light source, the blue light source, and the green light source in each of the partition backlights in the frame time, thereby controlling the chromaticity and brightness of each partition backlight. Chroma of each partition backlight And the brightness can be close to the corresponding partition image. Because the chromaticity and brightness of each partition backlight are close to the corresponding partition image, the light emitted by the entire backlight module composed of the backlights of each partition has formed a relatively large image before passing through the liquid crystal module. A blurred image, and the more blurred image is close to the frame image to be displayed.
  • the signal processor drives each sub-pixel unit in the liquid crystal module according to the driving voltage of each sub-pixel unit determined by the image information processing unit, so that the light emitted by each of the partition backlights passes through the liquid crystal module, and can display corresponding Partitioned image.
  • each partition image can form a complete image of one frame, thereby realizing the display of the image.
  • each of the partition backlights controls the duty ratios of the red light source, the blue light source, and the green light source according to the corresponding partition image, thereby reducing the power consumption of the backlight module and improving the power consumption of the backlight module.
  • Backlight utilization Especially when the partition image is a single color (or only a single color with different gray levels), the corresponding partition backlight only needs to turn on the light source of one color, thereby more significantly reducing the power consumption of the backlight module, and improving the backlight. rate.
  • the partition image can reduce the power consumption of the backlight module to a greater extent and improve the utilization of the backlight.
  • the backlight module provided by the present invention, in the process of displaying one frame of image, only the liquid crystal module is driven once, and the utilization of the FSC is not adopted while improving the utilization of light, thereby solving the problem.
  • the technical problem of color cracking occurs in the existing FSC display mode.
  • each frame image is divided into three color fields. If the liquid crystal display needs to be displayed at a refresh rate of 60 Hz, the actual refresh rate is 180 Hz. However, the display device provided by the embodiment of the present invention does not adopt the FSC display mode. If the display needs to be displayed at a refresh rate of 60 Hz, the actual refresh rate is still 60 Hz. Therefore, the display device provided by the embodiment of the invention has lower requirements on the refresh rate and lower requirements on the response speed (response time) of the liquid crystal. Therefore, the display device provided by the embodiment of the invention has lower cost and is easier. It is implemented in various modes such as IPS, VA, and TN. Embodiment 3;
  • Embodiments of the present invention provide a display device including a backlight module, a liquid crystal module, an image information processing unit, a signal processor, and a clock controller.
  • the backlight module, the image information processing unit, the signal processor, and the B-inch clock controller are the same as the backlight module, the image information processing unit, the signal processor, and the clock controller in the first embodiment or the second embodiment.
  • each pixel unit of the liquid crystal module includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, a red filter layer is disposed in the red sub-pixel, and a green filter layer is disposed in the green sub-pixel.
  • a blue filter layer is disposed in the blue sub-pixel.
  • the liquid crystal module of the first embodiment or the second embodiment is replaced with a common liquid crystal module of red, green and blue pixel structures.
  • the functions of the components such as the backlight module, the image information processing unit, the signal processor, and the clock controller, and the driving method of the display device are basically the same as those of the first embodiment and the second embodiment.
  • the red sub-pixels in this embodiment can only transmit red light, the total transmittance of the display device is low.
  • the effect of reducing power consumption can be achieved by controlling the duty ratio of the light sources of different colors in the partition backlight.
  • the FSC display mode is not used, so that the problem of color cracking in the FSC display mode is also avoided.
  • the display device provided in the present embodiment has a lower requirement for the drama rate, and can be more easily implemented by using liquid crystal modules of various modes such as IPS, VA, and TN.

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Abstract

一种背光模组（10）、显示装置及其驱动方法，解决了现有的FSC液晶显示器会发生色裂现象的技术问题。背光模组（10），包括控制器（13）和若干个分区背光（2）；每个分区背光（2）中包括至少两个独立驱动的不同颜色的光源（2R，2B）；控制器（13）控制每个分区背光（2）中各个不同颜色的光源的打开时间。可用于液晶电视、液晶显示器、手机、平板电脑等显示装置。

Description

本申请要求享有 2014年 5月 23 日提交的名称为 "背光模组、 显示装置及其驱动方 法" 的中国专利申请 CN201410222197.3的优先权， 其全部内容通过引] ¾并入本文中。 技术领域
本发明涉及显示技术领域， 具体地说， 涉及一种背光模组、 显示装置及其驱动方法。
随着显示技术的发展， 液晶显示器 （LCD) 已经成为最为常见的平板显示装置。 其中， 采用场序彩色 （Field Sequential Color, 簡称 FSC) 方式来显示图像的液晶显 示器， 不需要设置红、 绿、 蓝三种颜色的滤光层， 从而能够减少光损失， 提高背光的利用
现有的 FSC液晶显示器的显示原理是， 将每一幀图像分为依次显示的三个色场。 在 第一色场中， 背光模组只发出红色光， 并通过驱动液晶模组， 以显示出该帧图像的红色部 分； 在第二色场中， 背光模组只发出绿色光， 并通过驱动液晶模组， 以显示出该幀图像的 绿色部分； 在第三色场中， 背光模组只发出蓝色光， 并通过驱动液晶模组， 以显示出该帧 图像的蓝色部分。 人眼依次看到这三个色场时， 就可以将这三个色场组合成该帧图像。
但是， 现有的 FSC液晶显示器至少存在以 T技术问题： 在显示过程中， 如果人眼与 FSC 液晶显示器发生相对移动， 那么人眼依次看到的三个色场就会落在人眼中的不同位 置， 则该帧图像的红色部分、绿色部分和蓝色部分将会错位的组合成一幅失真的图像， 即 发生色裂 （ Color Breafc Up) 现象。 发明内容
本发明的目的在于提供一种背光模组、 显示装置及其驱动方法， 以解决现有的 FSC 液晶显示器会发生色裂现象的技术问题。 本发明提供一种背光模组， 包括控制器和若千个分区背光， 其中，
每个所述分区背光中包括至少两个独立驱动的不同颜色的光源；
所述控制器控制每个所述分区背光中各个不同颜色的光源的打开时间。
优选的， 每个所述分区背光中包括红色光源、蓝色光源， 以及设置于所述蓝色光源周 围的绿色荧光粉。
优选的， 所述绿色荧光粉为硫化物荧光粉、 铝酸盐荧光粉、 磷酸盐荧光粉、 硼酸盐荧 光粉、 硅酸盐荧光粉、 氮氧化物荧光粉或量子点荧光粉。
或者， 每个所述分区背光中包括红色光源、 蓝色光源和绿色光源。 优选的， 所述分区背光的形状为矩形。
优选的， 所述分区背光呈阵列式排布。
优选的， 所述分区背光的数量在 200个至 36864个之间。
本发明还提供一种显示装置， 包括液晶模组和上述的背光模组。
优选的， 所述液晶模组包括若干个像素单元， 每个所述像素单元包括无色子像素、绿 色子像素和蓝色子像素；
所述无色子像素中设置有无色滤光层或不设置滤光层,所述绿色子像素中设置有绿色 滤光层， 所述蓝色子像素中设置有蓝色滤光层。
进一步， 该显示装置还包括；
图像信息处理单元，用于根据所述显示装置所要显示的一幀图像，确定所述背光模组 的每个分区背光中各个不同颜色的光源在该顿中的打开时间，以及所述液晶模组中的各子 像素单元的驱动电压；
信号处理器， 用于根据所确定的驱动电压， 驱动所述液晶模组中的各个子像素单元。 进一步， 该显示装置还包括时钟控制器， 于对所述信号处理器和所述背光模组中的 控制器进行时间匹配。
本发明还提供了上述显示装置的驱动方法， 在所述显示装置所显示的一帧图像中； 由图像信息处理单元根据该幀图像确定所述背光模组的每个分区背光中各个不同颜 色的光源在该幀中的打开时间， 以及所述液晶模组中的各子像素单元的驱动电压；
由所述背光模组中的控制器基于所确定的打开^间，打开所述背光模组的每个分区背 光中的各个不同颜色的光源； 由信号处理器基于所确定的驱动电压， 驱动所述液晶模组中的各个子像素单元。 本发明带来了以下有益效果： 利用本发明提供的背光模组， 在显示过程中， 可以先将 所要显示的一幀图像划分成若干个分区图像,且每个分区图像与背光模组的每个分区背光 一一对应。背光模组中的控制器控制每个分区背光中各个不同颜色的光源在这一幀中的打 开时间，也就是控制各个不同颜色的光源在这一幀中的占空比， 以控制每个分区背光的色 度和亮度， 使每个分区背光的色度和亮度能够接近于其所对应的分区图像。 同时， 驱动液 晶模组中的各个子像素单元，使分区背光发出的光经液晶模组之后，能够显示出其所对应 的分区图像， 各分区图像即可组成完整的一帧图像。 本发明提供的背光模组中，每个分区背光根据相应的分区图像，控制不同颜色的光源 的占空比， 从而降低了背光模组的功耗， 也提高了背光的利用率。特别是当分区图像为单 一颜色 ，相应的分区背光只需打开一种颜色的光源，从而更为显著的降低背光模组的功 耗， 提高背光的利用率。 并且， 利用本发明提供的背光模组， 在显示一帧图像的过程中， 只需对液晶模组驱动一次， 在提高光的利用率的同时， 而并不采用 FSC的显示方式， 从 而解决了现有的 FSC显示方式会发生色裂现象的技术问题。 本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显 而易见， 或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要 求书以及 ^图中所特别指出的结构来实现和获得。
附圑说明 为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要的附图 做简单的介绍： 图 1是本发明实施例一提供的背光模组的示意图； 图 2是本发明实施例一提供的背光模组中分区背光的示意图； 图 3是本发明实施例一提供的显示装置的示意图； 图 4是本发明实施例一提供的显示装置的另一示意图； 图 5是本发明实施例二提供的背光模组中分区背光的示意图。 具体实貪方式
以下将结合附图及实施例来详细说明本发明的实施方式,借此对本发明如何应用技术 手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是， 只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形 成的技术方案均在本发明的保护范围之内。
实施例一：
如图 1所示， 本发明实施例提供一种背光模组 10， 包括控制器和若干个分区背光 2 (控制器通常可设置在分区背光之下， 因此图 1中未示出控制器）。分区背光 2的形状优 选为矩形， 且每个分区背光 10都具有相同的形状和大小。
分区背光 2可以呈阵列式紧密排布，其数量范围可以在 200个至 36864个之间。例如， 共有 600个分区背光 2, 则可以呈 30 X 20的阵列式排布。 又如， 该背光模组 10应 ^于分 辨率为 3840 X 2160的超高清（UD) 电视中^ , 分区背光 2的数量可以为 36864个， 旦以 256 X 144的阵列式排布， 则可以实现每个分区背光 2仅为 225 ( 15 X 15 )个像素单元提供 背光源。
每个分区背光中包括至少两个独立驱动的不同颜色的光源。如图 2所示,本实施例中， 每个分区背光 2中包括红色光源 2R、蓝色光源 2B, 以及设置于蓝色光源周围的绿色荧光 粉 20G。 其中， 红色光源 2R.和蓝色光源 2B均优选为 LED。 绿色荧光粉 20G可以是硫化 物荧光粉、 铠酸盐荧光粉、 磷酸盐荧光粉、 硼酸盐荧光粉、 硅酸盐荧光粉、 氮氧化物荧光 粉或量子点荧光粉。
控制器用于控制每个分区背光中各个不同颜色的光源的打开时间。本实施例中，可利 用控制器控制分区背光中红色光源 2R和蓝色光源 2B在一帧时间内的打开时间， 也就是 控制红色光源 2R.和蓝色光源 2B在一帧 ^间内的占空比， 就能够控刺每个分区背光 2在 该帧时间内的色度和亮度， 丛而使每个分区背光 2能够具有各不相同的色度和亮度。
本发明实施 ί到还提供一种显示装置， 具体可以是液晶电视、 液晶显示器、手机、 平板 电脑等， 该显示装置包括液晶模组和本发明实施例提供的上述背光模组。
如图 3所示， 本实施例中， 该液晶模组 30包括若干个像素单元， 每个像素单元包括 无色子像素 Τ、 绿色子像素 G和蓝色子像素 Β。 无色子像素 Τ中设置有无色滤光层 3Τ或 不设置滤光层， 绿色子像素 G中设置有绿色滤光层 3G， 蓝色子像素 B中设置有蓝色滤光 层 3B。 分区背光 2中的红色光源 2R、 蓝色光源 2B及绿色荧光粉 20G发出的光， 经过背光 模组 10中的扩散片 1 1、 棱镜片 12等混光部件后， 即可进入液晶模组 30。 在液晶模组 30 中， 蓝色子像素 B可透过蓝色光， 绿色子像素 G可透过绿色光， 而无色子像素 T可透过 所有颜色的光。 因为无色子像素 T可以透过所有颜色的光， 所以能够提高液晶模组 30整 体的透过率和背光的利用率， 并且提高了所显示的图像的亮度。 如图 4 所示， 本发明实施例提供的显示装置中， 进一步还包括图像信息处理单元 4 和信号处理器 5。 图像信息处理单元 4用于根据显示装置所要显示的一帧图像， 确定背光 模组 10 的每个分区背光中红色光源和蓝色光源在该帧中的打开时间， 以及液晶模组 30 中的各子像素单元的驱动电压。 背光模组 10中的控制器 13可根据所确定的衧开时间， 打开背光模组 10的每个分区 背光中的红色光源和蓝色光源，从而使每个分区背光能够具有各不相同的色度和亮度。另 一方面， 信号处理器 5根据所确定的驱动电压， 驱动液晶模组 30中的各个子像素单元， 使背光模组 10发出的光经过液晶模组 30之后， 能够显示出该帧图像。 本实施例中， 显示装置进一歩还可以包括时钟控制器 6， 用于对信号处理器 5和背光 模组 10中的控制器 13进行 B寸间匹配，以确保背光模组 10发出的光与液晶模组 30的驱动 对同一帧图像进行的。 本发明实施例提供的上述显示装置的驱动方法为， 在显示装置所显示的一帧图像中： 首先,根据该幀图像确定背光模组的每个分区背光中红色光源和蓝色光源在该帧中的 打开时间， 以及液晶模组中的各子像素单元的驱动电压。 如图 4所示，具体的，可以由图像信息处理单元 4将该帧图像划分成若千个分区图像， 每个分区图像与背光模组 10的每个分区背光一一对应。 图像信息处理单元 4 根据每个分区图像确定相对应的每个分区背光中红色光源和蓝 色光源在该帧中的打开时间，也就是控制红色光源和蓝色光源在这一帧中的占空比， 以控 制每个分区背光的色度和亮度，使每个分区背光的色度和亮度能够接近于其所对应的分区 图像。 例如， 本实施例中， 分区背光 2包括红色光源 2R、 蓝色光源 2B (以及绿色荧光粉 20G) ， 如图 2所示。 如果某一分区图像包含了较多的红色， 而蓝色和绿色较少， 则与该 分区图像对应的分区背光 2中， 红色光源 2R打开的 '间就会较长， 而蓝色光源 2B打开 的^间较短， 即红色光源 2R的占空比较大， 蓝色光源 2B的占空比较小。 如果某一分区 图像为单一的红色 （或仅包含不同灰阶的红色） ， 则与该分区图像对应的分区背光 2中， 就可以只打开红色光源 2R, 而不需要打开蓝色光源 2B , 即红色光源 2R的占空比为 1， 蓝色光源 2B的占空比为 0。 这样就能够在该分区背光 2中显著降低蓝色光源 2B的功耗, 也避免了蓝色光的损失。
应当说明的是， 红色光源 2R的占空比与蓝色光源 2B的占空比是相互独立的， 两者 的占空比之和并不一定等于 1。 当某一分区图像为亮度较高的白色 Βί , 与其相对应的分区 背光 2中， 红色光源 2R的占空比和蓝色光源 2Β的占空比可以都等于 1 : 当某一分区图 像为黑色时， 与其相对应的分区背光 2中， 红色光源 2R的占空比和蓝色光源 2Β的占空 比也可以都等亍 0。
另一方面， 如图 4所示， 图像信息处理单元 4还根据各个分区图像， 以及相应的分区 背光的色度和亮度， 确定液晶模组 30中的各子像素单元的驱动电压。 然后，根据图像信息处理单元 4所确定的每个分区背光中红色光源和蓝色光源在该帧 中的打开时间， 打开背光模组的每个分区中的红色光源和蓝色光源。
具体的，由背光模组 10中的控制器 3控制每个分区背光中红色光源和蓝色光源在这 一帧时间内的打开 B寸间， 即红色光源和蓝色光源在这一帧时间内的占空比，丛而控制每个 分区背光的色度和亮度， 使每个分区背光的色度和亮度能够接近于其所对应的分区图像。 因为每个分区背光的色度和亮度都接近于其所对应的分区图像，所以由各个分区背光组成 的整个背光模组 10发出的光，在经过液晶模组 30之前，就已经形成了一幅较为模糊的图 像， — 该较为模糊的图像接近于所要显示的该帧图像。
同时，信号处理器 5根据图像信息处理单元 4所确定的各子像素单元的驱动电压，驱 动液晶模组 30中的各个子像素单元，使每个分区背光发出的光经过液晶模组 30之后，能 够显示出相应的分区图像。这样， 各个分区图像就能够组成一帧完整的图像， 从而实现了 图像的显示。 本发明实施例提供的显示装置在显示过程中，可以先由图像信息处理单元 4将所要显 示的一帧图像划分成若千个分区图像， 且每个分区图像与背光模组 10的每个分区背光一 一对应。图像信息处理单元 4再根据各个分区图像，确定相应的分区背光中红色光源和蓝 色光源在这一帧时间内的占空比， 以及液晶模组 30中各子像素单元的驱动电压。 背光模组 10中的控制器 13根据图像信息处理单元 4所确定的占空比，控制每个分区 背光中红色光源和蓝色光源在这一帧中的占空比， 以控制每个分区背光的色度和亮度，使 每个分区背光的色度和亮度能够接近于其所对应的分区图像。这样， 由各个分区背光组成 的整个背光模组 10发出的光，在经过液晶模组 30之前，就己经形成了一幅接近于所要显 示的该帧图像的模糊图像。
同时， 由信号处理器 5根据图像信息处理单元 4所确定的驱动电压， 驱动液晶模组 30中的各个子像素单元， 使每个分区背光发出的光经液晶模组 30之后， 能够显示出其所 对应的分区图像。这样， 各个分区图像就能够组成一帧完整的图像， 从而实现了图像的显 示。
因为本发明实施例提供的背光模组中，每个分区背光根据相应的分区图像，控制红色 光源和蓝色光源的占空比， 所以能够降低背光模组的功耗， 也提高了背光的利用率。特别 是当分区图像为单一颜色（或仅包括不同灰阶的单一颜色）时， 相应的分区背光只需打开 一种颜色的光源， 从而更为显著的降低背光模组的功耗， 提高背光的利用率。而且， 分区 背光的数量越多， 每个分区背光的面积就越小， 其所对应的分区图像的面积也越小， 也就 越容易出现单一颜色（或仅包括不同灰阶的单一颜色）的分区图像， 从而能在更大程度上 降低背光模组的功耗， 提高背光的利用率。
另一方面， 利用本发明提供的背光模组， 在显示一帧图像的过程中， 只需对液晶模组 驱动一次，在提高光的利用率的同时，并不采用 FSC的显示方式，从而解决了现有的 FSC 显示方式会发生色裂现象的技术 题。
此外， 现有的 FSC显示方式中， 将每一帧图像分为三个色场， 如果液晶显示器需要 以 60Hz的剧新率进行显示， 则实际的刷新率要达到 180Hz。 而本发明实施例提供的显示 装置不采用 FSC的显示方式，如果需要以 60Hz的剧新率进行显示，则实际的刷新率仍然 是 60Hz„ 因此， 本发明实施 ί到提供的显示装置对于剥新率的要求更低， 对液晶的响应速 度（响应时间） 的要求也更低， 所以本发明实施例提供的显示装置的成本更低， 也更容易 以平面转换 (In-Plane Switching, 简称 IPS ) 、 垂直排列 (Vertical Alignment, 简称 VA) 、 扭曲向列 （ Twisted Nemaiic, 简称 TN) 等多种模式来实施。
实施例二；
如图 5所示，本发明实施例提供的背光模组与实施例一提供的背光模组基本相同，其 不同点在于， 本实施例提供的背光模组 10中， 每个分区背光 2中包括独立驱动的红色光 源 2R、 蓝色光源 2B和绿色光源 2G。 该背光模组 10中控制器 (图中未示出) 可控制分 区背光 2中红色光源 2R、蓝色光源 2B和绿色光源 2G在一帧 ^间内的占空比， 从而控制 每个分区背光 2在该帧时间内的色度和亮度，使每个分区背光 2能够具有各不相同的色度 和亮度。
本发明实施例提供的显示装置中包括背光模组和液晶模组。其中，背光模组为本实施 例提供的上述背光模组；而液晶模组与实施例一中的液晶模组相同， 该液晶模组的每个像 素单元中包括无色子像素、 绿色子像素和蓝色子像素。
本发明实施例提供的显示装置中，还包括图像信息处理单元、信号处理器和时钟控制 器， 其功能及驱动方法与实施例一基本相同。具体的驱动方法为， 在显示装置所显示的一 帧图像中：
首先， 由图像信息处理单元将该帧图像划分成若干个分区图像，且每个分区图像与背 光模组的每个分区背光一一对应。
根据每个分区图像确定相对应的每个分区背光中红色光源、蓝色光源和绿色光源在该 帧中的占空比， 以控制每个分区背光的色度和亮度，使每个分区背光的色度和亮度能够接 近于其所对应的分区图像。
如图 5所示， 如果某一分区图像包含了较多的红色， 而蓝色和绿色较少， 则与该分区 图像对应的分区背光 2中， 红色光源 2R就会具有较大的占空比， 蓝色光源 2B和绿色光 源 2G具有较小的占空比。如果某一分区图像为单一的红色（或仅包含不同灰阶的红色）， 则与该分区图像对应的分区背光 2中， 就可以只打幵红色光源 2R, 而不需要打开蓝色光 源 2B和绿色光源 2G， 即红色光源 2R的占空比为 1 ,蓝色光源 2B和绿色光源 2G的占空 比为 0。 这样就能够在该分区背光 2中显著降低蓝色光源 2B和绿色光源 2G的功耗， 也 避免了蓝色光和绿色光的损失。
另一方面， 图像信息处理单元还根据各个分区图像， 以及相应的分区背光的色度和亮 度， 确定液晶模组中的各子像素单元的驱动电压。
然后，根据图像信息处理单元所确定的每个分区背光中红色光源、蓝色光源和绿色光 源在该帧中的占空比， 打开背光模组的每个分区中的红色光源、 蓝色光源和绿色光源。
具体的， 由背光模组中的控制器控制每个分区背光中红色光源、蓝色光源和绿色光源 在这一帧时间内的占空比，从而控制每个分区背光的色度和亮度，使每个分区背光的色度 和亮度能够接近于其所对应的分区图像。因为每个分区背光的色度和亮度都接近亍其所对 应的分区图像，所以由各个分区背光组成的整个背光模组发出的光，在经过液晶模组之前， 就己经形成了一幅较为模糊的图像， 且该较为模糊的图像接近于所要显示的该帧图像。 同时，信号处理器根据图像信息处理单元所确定的各子像素单元的驱动电压，驱动液 晶模组中的各个子像素单元，使每个分区背光发出的光经过液晶模组之后，能够显示出相 应的分区图像。这样，各个分区图像就能够组成一帧完整的图像，从而实现了图像的显示。
因为本发明实施例提供的背光模组中，每个分区背光根据相应的分区图像，控制红色 光源、蓝色光源和绿色光源的占空比， 所以能够降低背光模组的功耗， 也提高了背光的利 用率。特别是当分区图像为单一颜色（或仅包括不同灰阶的单一颜色） 相应的分区背 光只需打开一种颜色的光源， 从而更为显著的降低背光模组的功耗， 提高背光的利 ^率。 而且， 分区背光的数量越多， 每个分区背光的靣积就越小， 其所对应的分区图像的面积也 越小， 也就越容易出现单一颜色（或仅包括不同灰阶的单一颜色） 的分区图像， 从而能在 更大程度上降低背光模组的功耗， 提高背光的利用率。
另一方面， 利用本发明提供的背光模组， 在显示一帧图像的过程中， 只需对液晶模组 驱动一次，在提高光的利用率的同时，并不采用 FSC的显示方式，从而解决了现有的 FSC 显示方式会发生色裂现象的技术问题。
此外， 现有的 FSC显示方式中， 将每一帧图像分为三个色场， 如果液晶显示器需要 以 60Hz的刷新率进行显示， 则实际的刷新率要达到 180Hz。 而本发明实施例提供的显示 装置不采用 FSC的显示方式，如果需要以 60Hz的刷新率进行显示，则实际的刷新率仍然 是 60Hz。 因此， 本发明实施例提供的显示装置对于刷新率的要求更低， 对液晶的响应速 度（响应时间） 的要求也更低， 所以本发明实施例提供的显示装置的成本更低， 也更容易 以 IPS、 VA、 TN等多种模式来实施。 实施例三；
本发明实施例提供一种显示装置， 包括背光模组、 液晶模组、 图像信息处理单元、 信 号处理器和时钟控制器等部件。 其中， 背光模组、 图像信息处理单元、 信号处理器和 B寸钟 控制器与实施例一或实施例二中的背光模组、图像信息处理单元、信号处理器和时钟控制 器相同。而本实施例中， 液晶模组的每个像素单元中包括红色子像素、绿色子像素和蓝色 子像素， 红色子像素中设置有红色滤光层， 绿色子像素中设置有绿色滤光层， 蓝色子像素 中设置有蓝色滤光层。 也就是将实施例一或实施例二中的液晶模组， 替换为普通的红、绿、蓝像素结构的液 晶模组。而背光模组、 图像信息处理单元、 信号处理器和时钟控制器等部件的功能、 及该 显示装置驱动方法均与实施例一、 实施 ί到二基本相同。 与实施例一、实施例二中的无色子像素相比，虽然本实施例中的红色子像素只能透过 红色光，使显示装置总的透过率较低。但本实施例中 {¾然能够通过控制分区背光中各个不 同颜色的光源的占空比， 达到降低功耗的效果。
此外， 本实施例中， 也不采用 FSC显示方式， 所以也避免了 FSC显示方式中会发生 色裂现象的问题。并且， 本实施例提供的显示装置对剧新率的要求较低， 从而能够更容易 的利用 IPS、 VA、 TN等多种模式的液晶模组进行实施。 虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的 实施方式， 并非用以限定本发明。任何本发明所属技术领域内的技术人员， 在不脱离本发 明所揭露的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但 本发明的专利保护范围， 仍须以所附的权利要求书所界定的范围为准。

Claims

棚要求书
1、 一种背光模组， 包括控制器和若干个分区背光， 其中，
每个所述分区背光中包括至少两个独立驱动的不同颜色的光源；
所述控制器控制每个所述分区背光中各个不同颜色的光源的打开时间。
2、 如权利要求 1所述的背光模组， 其中， 每个所述分区背光中包括红色光源、 蓝色 光源， 以及设置于所述蓝色光源周围的绿色荧光粉。
3、 如权利要求 2所述的背光模组， 其中， 所述绿色荧光粉为硫化物荧光粉、 铝酸盐 荧光粉、磷酸盐荧光粉、硼酸盐荧光粉、硅酸盐荧光粉、氮氧化物荧光粉或量子点荧光粉。
4、 如权利要求 1所述的背光模 ， 其中， 每个所述分区背光中包括红色光源、 蓝色 光源和绿色光源。
5、 如权利要求 1所述的背光模组， 其中， 所述分区背光的形状为矩形。
6、 如权利要求 1所述的背光模组， 其中， 所述分区背光呈阵列式排布。
7、 如权利要求 1所述的背光模组， 其中， 所述分区背光的数量在 200个至 36864个 之间。
8、 一种显示装置， 包括液晶模组和背光模组；
所述背光模组包括控制器和若干个分区背光，其中，每个所述分区背光中包括至少两 个独立驱动的不同颜色的光源;所述控制器控制每个所述分区背光中各个不同颜色的光源 的打开时间。
9、 如权利要求 8所述的显示装置， 其中， 所述液晶模组包括若干个像素单元， 每个 所述像素单元包括无色子像素、 绿色子像素和蓝色子像素；
所述无色子像素中设置有无色滤光层或不设置滤光层,所述绿色子像素中设置有绿色 滤光层， 所述蓝色子像素中设置有蓝色滤光层。
10、 如权利要求 8所述的显示装置， 其中， 还包括： 图像信息处理单元，用于根据所述显示装置所要显示的一幀图像，确定所述背光模组 的每个分区背光中各个不同颜色的光源在该帧中的打开时间，以及所述液晶模组中的各子 像素单元的驱动电压； 信号处理器， 用于根据所确定的驱动电压， 驱动所述液晶模组中的各个子像素单元。
1 1、 如权利要求！ 0所述的显示装置， 其中， 还包括时钟控制器， 用于对所述信号处 理器和所述背光模组中的控制器进行 B寸间匹配。
12、 一种显示装置的驱动方法，
所述显示装置包括液晶模组和背光模组；
所述背光模组包括控制器和若干个分区背光，其中，每个所述分区背光中包括至少两 个独立驱动的不同颜色的光源；所述控制器控制每个所述分区背光中各个不同颜色的光源 的打开 '间；
所述驱动方法为， 在所述显示装置所显示的一幀图像中- 由图像信息处理单元根据该帧图像确定所述背光模组的每个分区背光中各个不同颜 色的光源在该幀中的扞幵时间， 以及所述液晶模组中的各子像素单元的驱动电压；
由所述背光模组中的控制器基于所确定的打开时间，打开所述背光模组的每个分区背 光中的各个不同颜色的光源；
由信号处理器基于所确定的驱动电压， 驱动所述液晶模组中的各个子像素单元。
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CN105761684A (zh) * 2016-05-17 2016-07-13 上海天马微电子有限公司 显示装置及其背光控制方法
CN105761684B (zh) * 2016-05-17 2019-01-22 上海天马微电子有限公司 显示装置及其背光控制方法

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