CN113611251A - Liquid crystal display module and driving device - Google Patents
Liquid crystal display module and driving device Download PDFInfo
- Publication number
- CN113611251A CN113611251A CN202110940026.4A CN202110940026A CN113611251A CN 113611251 A CN113611251 A CN 113611251A CN 202110940026 A CN202110940026 A CN 202110940026A CN 113611251 A CN113611251 A CN 113611251A
- Authority
- CN
- China
- Prior art keywords
- backlight
- liquid crystal
- crystal display
- layer
- display
- 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
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
Abstract
The invention discloses a liquid crystal display assembly and a driving device, wherein the liquid crystal display assembly comprises a liquid crystal display layer and a backlight layer, the backlight layer comprises at least two backlight partitions, the at least two backlight partitions are configured to provide backlight for the at least two display partitions, the at least two backlight partitions are in one-to-one correspondence connection with the at least two display partitions, and the at least two backlight partitions are configured to be independently opened and closed according to gray scale information of an accessed image. The backlight subareas are independently opened and closed according to the gray information of the access image, so that the backlight layer can perform dynamic backlight control according to the access image, and the defect that liquid crystal molecules in the liquid crystal display layer cannot be completely closed and light leaks is overcome, so that higher contrast is provided, and the display effect of the liquid crystal display assembly is improved; in addition, the liquid crystal display component can control the backlight partition corresponding to the display partition needing to display black to be closed, so that the overall power consumption of the liquid crystal display component is lower.
Description
Technical Field
The invention relates to the technical field of image display, in particular to a liquid crystal display assembly and a running device.
Background
In the vehicle-mounted industry, the vehicle-mounted display screen of the driving device such as the automobile is gradually enlarged along with various requirements and development trends of customers, and various large-screen displays are placed on the display platform of the driving device such as the automobile from 7 inches to 10.25 inches and 12 inches in the past to 15 inches and 17 inches in the large-screen. However, with the screen becoming larger and larger, the requirements of the display effect, especially CR (Contrast Ratio) and HDR (High-Dynamic Range, which can provide more Dynamic Range and image details), are required, and the existing LCD display cannot meet the requirements of the two indexes. At present, Liquid Crystal Display (LCD) Display is the predominant Display screen on vehicles in the world.
Due to the improvement of the display effect requirement, the vehicle-mounted display screen tends to adopt an OLED (Organic Light-Emitting display) screen, but the OLED screen has poor stability and short service life, which makes it difficult to be widely popularized in the display field of the driving devices such as automobiles. The existing LCD display screen has poor CR (contrast ratio), and the display effect needs to be improved.
Disclosure of Invention
The invention provides a liquid crystal display assembly, aiming at improving the display effect.
In order to achieve the above object, the liquid crystal display assembly provided by the present invention comprises a liquid crystal display layer and a backlight layer, wherein the liquid crystal display layer comprises at least two display partitions, and the at least two display partitions are used for displaying an access image; the backlight layer comprises at least two backlight subareas, the at least two backlight subareas are configured to provide backlight for the at least two display subareas, the at least two backlight subareas are in one-to-one correspondence connection with the at least two display subareas, and the at least two backlight subareas are configured to be independently opened and closed according to the gray scale information of the access image.
Optionally, the liquid crystal display assembly further comprises an image processing device, the image processing device comprises a first processing unit and a second processing unit, and the first processing unit is configured to control the display of the at least two display partitions according to the access image; the second processing unit is configured to output at least two paths of start and stop signals according to the gray information of different areas of the access image, and the at least two paths of start and stop signals control the start and stop of the at least two backlight subareas in a one-to-one correspondence manner. The opening and closing of the at least two backlight partitions are controlled in a one-to-one correspondence mode through the arrangement of the at least two paths of opening and closing signals, so that the independence of the interior of the second processing unit is improved, the internal interference is reduced, and the accuracy of the second unit is improved.
Optionally, the second processing unit includes a gain module, and the gain module is configured to gain the at least two paths of on/off signals. Through setting up the gain module, the second processing unit can control the magnification of each way start-stop signal, makes the subregion in a poor light that corresponds can obtain brighter back light, further improves and shows contrast, further promotes the display effect.
Optionally, the second processing unit further includes a conversion module for converting RGB data of the access image into a grayscale image, a first filter module for performing histogram filtering, a calibration module for performing adaptive calibration, a second filter module for performing spatial filtering, and a correction module for performing code-adding correction, and the conversion module, the first filter module, the calibration module, the second filter module, the gain module, and the correction module are sequentially connected. Through the arrangement of the conversion module, the first filtering module, the calibration module, the second filtering module, the gain module and the correction module which are connected in sequence, the second processing unit can obtain more accurate and real-time on-off signals, and the dynamic display effect of the liquid crystal display assembly is improved.
Optionally, the second processing unit is configured to set the on-off signal corresponding to the access image area with the gray value smaller than the preset value to off when the gray value of the access image area is smaller than the preset value, so as to further improve the contrast of the liquid crystal display module and further improve the display effect.
Optionally, the image processing apparatus includes a field programmable gate array, which improves the processing efficiency of the image processing apparatus, making the image processing apparatus more suitable for programming control.
Optionally, the at least two backlight partitions are provided with driving components, and the driving components are configured to drive the backlight partitions to be turned on and off according to the turn-on and turn-off signals; the driving assembly includes a synchronization unit configured to synchronize an on/off signal of the backlight partition with a display signal of a corresponding display partition. The synchronization unit improves the synchronism of the display subarea and the backlight subarea, reduces the backlight providing time difference caused by asynchronous signals of the display subarea and the backlight subarea, and enables the backlight subarea to provide backlight more accurately.
Optionally, the synchronization unit is configured to maintain the current on-off signal for a first preset time and then acquire a subsequent on-off signal; or the image processing device further comprises a time delay device, wherein the time delay device is configured to maintain the current frame of the access image for a second preset time and then acquire the subsequent frame of the access image; the delay device is arranged between the first processing unit and the liquid crystal display layer, and the second preset time is determined according to the time difference between the output signal of the second processing unit and the output signal of the first processing unit. The time delay device improves the synchronism of the display subarea and the backlight subarea, reduces the backlight supply time difference caused by asynchronous signals of the display subarea and the backlight subarea, and enables the display subarea to be more timely adapted to the backlight of the backlight subarea to display the access image. The second preset time is determined according to the time difference between the output signal of the second processing unit and the output signal of the first processing unit, so that the delay device can dynamically adjust the delay time in real time according to the information processing states of the first processing unit and the second processing unit, and the synchronism of the display partition and the backlight partition is further improved.
Optionally, the backlight layer comprises a flexible substrate and at least two light emitting elements disposed on the flexible substrate, and the liquid crystal display layer is disposed as a curved layer; and/or the backlight layer is arranged in a lamination way with the liquid crystal display layer so that the backlight layer provides direct-type backlight. The backlight layer comprises a flexible substrate, so that the liquid crystal display assembly can adapt to a curved surface space, and the application scenes of the liquid crystal display device are increased. The backlight layer and the liquid crystal display layer are arranged in a stacked mode so that the backlight layer provides direct type backlight, light of the backlight layer is prevented from leaking from the side face to affect liquid crystal molecules, and the display effect of the liquid crystal display layer is guaranteed.
The invention also provides a running device which comprises the liquid crystal display assembly.
According to the technical scheme, at least two backlight subareas of the backlight layer are configured to be in one-to-one corresponding connection with at least two display subareas of the liquid crystal display layer and provide backlight, and the backlight subareas are independently opened and closed according to the gray information of the access image, so that the backlight layer can carry out dynamic backlight control according to the access image, the defect of light leakage caused by incomplete closing of liquid crystal molecules in the liquid crystal display layer is overcome, the area needing to be displayed of the liquid crystal display assembly is brighter, the area needing not to be displayed is darker, higher contrast is provided, and the display effect of the liquid crystal display assembly is improved; in addition, the liquid crystal display component can control the backlight partition corresponding to the display partition needing to display black to be closed, so that the overall power consumption of the liquid crystal display component is lower.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an LCD assembly according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a liquid crystal display device according to another embodiment of the present invention.
FIG. 3 is a schematic structural diagram of a second processing unit in an embodiment of a liquid crystal display device according to the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Liquid |
11 | Display partition |
| 2 | |
21 | |
| 211 | |
3 | Image processing apparatus |
| 31 | A |
32 | |
| 321 | |
322 | |
| 323 | |
324 | |
| 325 | |
326 | |
| 33 | Time delay device |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a liquid crystal display assembly.
Referring to fig. 1 and 3, in an embodiment of the present invention, the liquid crystal display assembly includes a liquid crystal display layer 1 and a backlight layer 2, the liquid crystal display layer 1 includes at least two display partitions 11, at least two display partitions 11 are used for displaying access images, and the liquid crystal display layer 1 is also commonly referred to as an LCD panel. It should be noted that the access image referred to in this specification includes a video file and a picture file. The backlight layer 2 comprises at least two backlight partitions 21. In the present embodiment, the backlight layer includes 128 backlight partitions 21, and each backlight partition 21 includes 16 Mini LED lights. The at least two backlight subareas 21 are configured to provide backlight for the at least two display subareas 11, the at least two backlight subareas 21 are in one-to-one correspondence connection with the at least two display subareas 11, namely, each backlight subarea 21 provides backlight for one display subarea 11, the at least two backlight subareas 21 are configured to be opened and closed independently according to gray scale information of an accessed image, namely, independent gray scale information exists in different areas of the accessed image, and the gray scale information of each area of the accessed image is used for independently controlling one backlight subarea 21. Wherein the on and off are both on and off, i.e. the backlight segments 21 provide brightness or are off. The backlight subareas 21 of the backlight layer 2 are configured to be in one-to-one correspondence connection with the display subareas 11 of the liquid crystal display layer 1 and provide backlight, and the backlight subareas 21 are independently opened and closed according to the gray scale information of the access image, so that the backlight layer 2 can carry out dynamic backlight control according to the access image, the defect of light leakage caused by incomplete closing of liquid crystal molecules in the liquid crystal display layer 1 is overcome, the area needing to be displayed of the liquid crystal display assembly is brighter, the area needing not to be displayed is darker, higher contrast is provided, and the display effect of the liquid crystal display assembly is improved; in addition, the liquid crystal display component can control the backlight subarea 21 corresponding to the display subarea 11 which needs to display black to be closed, so that the overall power consumption of the liquid crystal display component is lower.
As an optional real-time manner, the backlight layer 2 may be configured to include a flexible substrate and at least two light emitting elements, i.e., the Mini LEDs, disposed on the flexible substrate, and the liquid crystal display layer 1 is configured as a curved layer; the backlight layer 2 is disposed in a stacked manner with the liquid crystal display layer 1 such that the backlight layer 2 provides a direct type backlight. The backlight layer 2 comprises a flexible substrate, so that the liquid crystal display assembly can adapt to a curved space, and the application scenes of the liquid crystal display device are increased. The backlight layer 2 and the liquid crystal display layer 1 are arranged in a stacked mode so that the backlight layer 2 provides direct type backlight, light of the backlight layer 2 is prevented from leaking from the side face to affect liquid crystal molecules, and the display effect of the liquid crystal display layer 1 is guaranteed.
The liquid crystal display assembly further comprises an image processing device 3, the image processing device 3 comprising a field Programmable Gate array (fpga). The field programmable gate array FPGA improves the processing efficiency of the image processing apparatus 3, making the image processing apparatus 3 more suitable for programming control. The image processing apparatus 3 includes a first processing unit 31 and a second processing unit 32, and the first processing unit 31 and the second processing unit 32 may be provided as programmable parts of a field programmable gate array FPGA. The first processing unit 31 is configured to control the display of at least two display partitions 11 according to the accessed image, specifically, as shown in fig. 1, after the LVDS RX of the field programmable gate array FPGA receives the video (or picture) data signal, the LVDS RX sends an image to the liquid crystal display layer 1 to be displayed (although the image cannot be seen if there is no backlight source); the second processing unit 32 is configured to output at least two on/off signals according to the gray information of different areas of the accessed image, and the at least two on/off signals control the on/off of the at least two backlight partitions 21 in a one-to-one correspondence manner. The opening and closing of at least two backlight subareas 21 are controlled in one-to-one correspondence mode by setting at least two paths of opening and closing signals, so that the independence of the interior of the second processing unit 32 is improved, the internal interference is reduced, and the accuracy of the second unit is improved. The second processing unit 32 outputs at least two on/off signals according to the gray scale information of different areas of the accessed image, and the specific structure of the at least two on/off signals for controlling the on/off of the at least two backlight partitions 21 in a one-to-one correspondence manner is described as follows.
As shown in fig. 3, the second processing unit 32 includes a conversion module 321, a first filtering module 322, a calibration module 323, a second filtering module 324, a gain module 325, and a correction module 326, which are connected in sequence, wherein the second processing unit 32 is configured to further include the conversion module 321 for converting RGB data of an access image into a grayscale image, the first filtering module 322 for performing histogram filtering, the calibration module 323 for performing adaptive calibration, the second filtering module 324 for performing spatial filtering, the gain module 325 for performing gain on at least two channels of on/off signals, and the correction module 326 for performing code-adding correction. By setting the gain module 325, the second processing unit 32 can control the amplification factor of each channel of on-off signal, so that the corresponding backlight partition 21 can obtain brighter backlight, the display contrast is further improved, and the display effect is further improved. Through the arrangement of the converting module 321, the first filtering module 322, the calibrating module 323, the second filtering module 324, the gain module 325 and the correcting module 326 which are connected in sequence, the second processing unit 32 can obtain more accurate and real-time on-off signals, and the dynamic display effect of the liquid crystal display assembly is improved. When the second processing unit 32 works, the conversion module 321, the first filtering module 322, the calibration module 323, the second filtering module 324, the gain module 325, and the correction module 326, which are connected in sequence, analyze the access image, and output the on/off signal of the backlight, such as the brightness of the backlight, the number of partitions, the number of bright Mini LED lamps, the driving time parameter of the backlight chip, and the like, after analyzing the access image. Then, for the on/off signal, when the on/off signal provides the luminance to the backlight partition 21, the on/off signal can be gain-amplified or gain-reduced to adjust the luminance of the backlight partition 21.
The second processing unit 32 is configured to set the on-off signal corresponding to the image access area with the gray value smaller than the preset value to be off when the gray value of the image access area is smaller than the preset value, so as to further improve the contrast of the liquid crystal display module and further improve the display effect. If a certain area of the accessed image is black, the corresponding gray value is zero, and is smaller than a preset value slightly larger than zero, the on-off signal corresponding to the area of the accessed image is set to be off, the backlight partition 21 controlled by the on-off signal is turned off, and the display partition 11 corresponding to the backlight partition 21 is not irradiated by backlight, so that even under the condition that the corresponding liquid crystal molecules cannot be completely closed, the display partition 11 can better display black, and the phenomenon that the display partition 11 displays gray due to the fact that the backlight leaks through the liquid crystal molecules is avoided.
At least two backlight partitions 21 are provided with driving components 211, and the driving components 211 are configured to drive the backlight partitions 21 to be opened and closed according to opening and closing signals. The driving component 211 is responsible for receiving and processing the on-off signals containing the information of the brightness of the backlight, the number of partitions, the number of the lit Mini LED lamps and the like, and converting the on-off signals into control signals to synchronize the backlight with the accessed images, so that the control effect of local dimming is achieved.
Further, the driving assembly 211 includes a synchronization unit configured to synchronize the on/off signal of the backlight partition 21 with the display signal of the corresponding display partition 11. The synchronization unit improves the synchronization between the display partition 11 and the backlight partition 21, and reduces the backlight providing time difference caused by the asynchronous signals of the display partition 11 and the backlight partition 21, so that the backlight partition 21 can provide the backlight more accurately. Furthermore, the synchronization unit is configured to maintain the current on-off signal for a first preset time and then acquire a subsequent on-off signal.
As shown in fig. 2 and fig. 3, in another embodiment of the liquid crystal display assembly of the present invention, the liquid crystal display assembly includes a liquid crystal display layer 1 and a backlight layer 2, the liquid crystal display layer 1 includes at least two display partitions 11, at least two display partitions 11 are used for displaying access images, and the liquid crystal display layer 1 is also commonly referred to as an LCD panel. It should be noted that the access image referred to in this specification includes a video file and a picture file. The backlight layer 2 comprises at least two backlight partitions 21. In the present embodiment, the backlight layer includes 128 backlight partitions 21, and each backlight partition 21 includes 16 Mini LED lights. The at least two backlight subareas 21 are configured to provide backlight for the at least two display subareas 11, the at least two backlight subareas 21 are in one-to-one correspondence connection with the at least two display subareas 11, namely, each backlight subarea 21 provides backlight for one display subarea 11, the at least two backlight subareas 21 are configured to be opened and closed independently according to gray scale information of an accessed image, namely, independent gray scale information exists in different areas of the accessed image, and the gray scale information of each area of the accessed image is used for independently controlling one backlight subarea 21. Wherein the on and off are both on and off, i.e. the backlight segments 21 provide brightness or are off. The backlight subareas 21 of the backlight layer 2 are configured to be in one-to-one correspondence connection with the display subareas 11 of the liquid crystal display layer 1 and provide backlight, and the backlight subareas 21 are independently opened and closed according to the gray scale information of the access image, so that the backlight layer 2 can carry out dynamic backlight control according to the access image, the defect of light leakage caused by incomplete closing of liquid crystal molecules in the liquid crystal display layer 1 is overcome, the area needing to be displayed of the liquid crystal display assembly is brighter, the area needing not to be displayed is darker, higher contrast is provided, and the display effect of the liquid crystal display assembly is improved; in addition, the liquid crystal display component can control the backlight subarea 21 corresponding to the display subarea 11 which needs to display black to be closed, so that the overall power consumption of the liquid crystal display component is lower.
As an optional real-time manner, the backlight layer 2 may be configured to include a flexible substrate and at least two light emitting elements, i.e., the Mini LEDs, disposed on the flexible substrate, and the liquid crystal display layer 1 is configured as a curved layer; the backlight layer 2 is disposed in a stacked manner with the liquid crystal display layer 1 such that the backlight layer 2 provides a direct type backlight. The backlight layer 2 comprises a flexible substrate, so that the liquid crystal display assembly can adapt to a curved space, and the application scenes of the liquid crystal display device are increased. The backlight layer 2 and the liquid crystal display layer 1 are arranged in a stacked mode so that the backlight layer 2 provides direct type backlight, light of the backlight layer 2 is prevented from leaking from the side face to affect liquid crystal molecules, and the display effect of the liquid crystal display layer 1 is guaranteed.
The liquid crystal display assembly further comprises an image processing device 3, the image processing device 3 comprising a field Programmable Gate array (fpga). The field programmable gate array FPGA improves the processing efficiency of the image processing apparatus 3, making the image processing apparatus 3 more suitable for programming control. The image processing apparatus 3 includes a first processing unit 31 and a second processing unit 32, and the first processing unit 31 and the second processing unit 32 may be provided as programmable parts of a field programmable gate array FPGA. The first processing unit 31 is configured to control the display of at least two display partitions 11 according to the accessed image, specifically, as shown in fig. 1, after the LVDS RX of the field programmable gate array FPGA receives the video (or picture) data signal, the LVDS RX sends an image to the liquid crystal display layer 1 to be displayed (although the image cannot be seen if there is no backlight source); the second processing unit 32 is configured to output at least two on/off signals according to the gray information of different areas of the accessed image, and the at least two on/off signals control the on/off of the at least two backlight partitions 21 in a one-to-one correspondence manner. The opening and closing of at least two backlight subareas 21 are controlled in one-to-one correspondence mode by setting at least two paths of opening and closing signals, so that the independence of the interior of the second processing unit 32 is improved, the internal interference is reduced, and the accuracy of the second unit is improved. The second processing unit 32 outputs at least two on/off signals according to the gray scale information of different areas of the accessed image, and the specific structure of the at least two on/off signals for controlling the on/off of the at least two backlight partitions 21 in a one-to-one correspondence manner is described as follows.
As shown in fig. 3, the second processing unit 32 includes a conversion module 321, a first filtering module 322, a calibration module 323, a second filtering module 324, a gain module 325, and a correction module 326, which are connected in sequence, wherein the second processing unit 32 is configured to further include the conversion module 321 for converting RGB data of an access image into a grayscale image, the first filtering module 322 for performing histogram filtering, the calibration module 323 for performing adaptive calibration, the second filtering module 324 for performing spatial filtering, the gain module 325 for performing gain on at least two channels of on/off signals, and the correction module 326 for performing code-adding correction. By setting the gain module 325, the second processing unit 32 can control the amplification factor of each channel of on-off signal, so that the corresponding backlight partition 21 can obtain brighter backlight, the display contrast is further improved, and the display effect is further improved. Through the arrangement of the converting module 321, the first filtering module 322, the calibrating module 323, the second filtering module 324, the gain module 325 and the correcting module 326 which are connected in sequence, the second processing unit 32 can obtain more accurate and real-time on-off signals, and the dynamic display effect of the liquid crystal display assembly is improved. When the second processing unit 32 works, the conversion module 321, the first filtering module 322, the calibration module 323, the second filtering module 324, the gain module 325, and the correction module 326, which are connected in sequence, analyze the access image, and output the on/off signal of the backlight, such as the brightness of the backlight, the number of partitions, the number of bright Mini LED lamps, the driving time parameter of the backlight chip, and the like, after analyzing the access image. Then, for the on/off signal, when the on/off signal provides the luminance to the backlight partition 21, the on/off signal can be gain-amplified or gain-reduced to adjust the luminance of the backlight partition 21.
The second processing unit 32 is configured to set the on-off signal corresponding to the image access area with the gray value smaller than the preset value to be off when the gray value of the image access area is smaller than the preset value, so as to further improve the contrast of the liquid crystal display module and further improve the display effect.
At least two backlight partitions 21 are provided with driving components 211, and the driving components 211 are configured to drive the backlight partitions 21 to be opened and closed according to opening and closing signals. The driving component 211 is responsible for receiving and processing the on-off signals containing the information of the brightness of the backlight, the number of partitions, the number of the lit Mini LED lamps and the like, and converting the on-off signals into control signals to synchronize the backlight with the accessed images, so that the control effect of local dimming is achieved.
Different from the previous embodiment, the image processing apparatus 3 in the liquid crystal display device further includes a delay apparatus 33, wherein the delay apparatus 33 is configured to maintain the current frame of the access image for a second preset time and then acquire the subsequent frame of the access image; the time delay device 33 is disposed between the first processing unit 31 and the liquid crystal display layer 1, and the second preset time is determined according to a time difference between the output signal of the second processing unit 32 and the output signal of the first processing unit 31. The delay device 33 improves the synchronism of the display partition 11 and the backlight partition 21, and reduces the backlight providing time difference caused by the asynchronous signals of the display partition 11 and the backlight partition 21, so that the display partition 11 can adapt to the backlight of the backlight partition 21 to display the access image more accurately. The second preset time is determined according to the time difference between the output signal of the second processing unit 32 and the output signal of the first processing unit 31, so that the delay device 33 can dynamically adjust the delay time in real time according to the information processing states of the first processing unit 31 and the second processing unit 32, and the synchronism of the display partition 11 and the backlight partition 21 is further improved. The delay device 33 is configured to maintain the current frame of the access image for a second preset time and then acquire the subsequent frame of the access image, that is, the computing capability of the second processing unit 32 is relatively limited with respect to the larger access image, so that the computing time for obtaining the on-off signal exceeds the time for transmitting the display information of the access image to the liquid crystal display layer 1, at this time, the delay device 33 only displays part of the frame of the liquid crystal display layer 1, thereby avoiding the on-off signal from being delayed from the display signal of the liquid crystal display layer due to the limited processing capability of the second processing unit 32, and avoiding the unsynchronization of the on-off signal and the display signal of the liquid crystal display layer.
As an alternative real-time manner, the driving component 211 includes a synchronization unit configured to synchronize the on/off signal of the backlight partition 21 with the display signal of the corresponding display partition 11. The synchronization unit improves the synchronization between the display partition 11 and the backlight partition 21, and reduces the backlight providing time difference caused by the asynchronous signals of the display partition 11 and the backlight partition 21, so that the backlight partition 21 can provide the backlight more accurately. Furthermore, the synchronization unit is configured to maintain the current on-off signal for a first preset time and then acquire a subsequent on-off signal. That is, the liquid crystal display module includes the synchronization unit and the delay device 33 in the driving module 211 at the same time, so that the liquid crystal display module can start any one of the synchronization unit and the delay device 33 in the driving module 211 at any time, that is, two hardware structures are provided, and the adaptability of the liquid crystal display module to different scenes is improved. For example, sometimes the access image is smaller, the processing time of the second processing unit 32 is shorter than the time when the display signal of the access image reaches the liquid crystal display layer 1, the current on-off signal is maintained for the first preset time, and then the subsequent on-off signal is acquired, that is, the on-off signal is extended, so that the extended portion in the on-off signal corresponds to the delay of the display signal transmitted to the liquid crystal display layer, thereby avoiding that the on-off signal is delayed faster than the display signal of the liquid crystal display layer due to the limited transmission speed of the display signal, and avoiding that the on-off signal and the display signal of the liquid crystal display layer are asynchronous.
When the liquid crystal display module works, the host in the drawing is responsible for inputting signals such as video and images which need to be displayed by the driving device, the processed video or image signals are input into the image processing device 3 by the host, the LVDS RX of the field programmable gate array FPGA of the image processing device 3 receives video data signals, and then the input images such as the video and the images are sent to the liquid crystal display layer 1 (namely, an LCD panel) through the LVDS TX for displaying, and the starting of the backlight source of the liquid crystal display layer 1 is not described at this moment, and the liquid crystal display layer 1 is regarded as having no backlight source temporarily. Through analysis, RGB data (three primary colors: red, green, and blue) are input to the second processing unit 32, the conversion module 321, the first filter module 322, the calibration module 323, the second filter module 324, the gain module 325, and the correction module 326 in the second processing unit 32 sequentially perform RGB conversion into a gray scale image, histogram filtering, adaptive calibration, spatial filtering, temporal filtering, output gain, and code-adding correction, and the second processing unit 32 may further be configured with a module for Mini LED light intensity control. After the above processing of the second processing unit 32, the second processing unit outputs an on/off signal to the driving component 211 for controlling the backlight partition 21, and the driving component 211 drives and controls the designated mini LED lamp through an algorithm control signal. A synchronization unit or delay device 33 in the driving assembly 211 controls the mini LED backlight in the backlight partition 21 and the display partition 11(LCD panel) to synchronize the access image, and adjusts the synchronization of the backlight layer 2 and the liquid crystal display layer 1. Through the steps, the display subarea 11 in the liquid crystal display layer 1, which needs to be provided with images for displaying, controls the lighting of the Mini LED lamp, and the area which is black and does not need brightness is controlled not to be lighted, so that the contrast ratio can be improved, the area which needs to be displayed by the liquid crystal display component is brighter, the area which does not need to be displayed is darker, and the display with higher contrast ratio effect is realized. In addition, the power consumption of the non-bright place is lower, and the power consumption of the liquid crystal display component is saved. When a certain display sub-area 11 needs to be normally lighted, the mini LED lamp area of the corresponding backlight sub-area 21 is controlled to be normally lighted, such as the area of the liquid crystal display module of the running device that needs to display the clock. Therefore, on the premise of power consumption, the situation that the contrast of a traditional liquid crystal display screen is low and a black area displays gray is avoided, and user experience is improved.
The invention also provides a running device which can be arranged as a traditional automobile, an electric automobile and the like and comprises the liquid crystal display assembly. The specific structure of the liquid crystal display module refers to the above embodiments, and since the driving device adopts all technical solutions of all embodiments of the liquid crystal display module, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The liquid crystal display assembly is characterized by comprising a liquid crystal display layer and a backlight layer, wherein the liquid crystal display layer comprises at least two display subareas, and the at least two display subareas are used for displaying access images; the backlight layer comprises at least two backlight subareas, the at least two backlight subareas are configured to provide backlight for the at least two display subareas, the at least two backlight subareas are in one-to-one correspondence connection with the at least two display subareas, and the at least two backlight subareas are configured to be independently opened and closed according to the gray scale information of the access image.
2. The liquid crystal display assembly of claim 1, further comprising an image processing device comprising a first processing unit and a second processing unit, the first processing unit configured to control display of the at least two display sections according to the access image; the second processing unit is configured to output at least two paths of start and stop signals according to the gray information of different areas of the access image, and the at least two paths of start and stop signals control the start and stop of the at least two backlight subareas in a one-to-one correspondence manner.
3. The liquid crystal display assembly of claim 2, wherein the second processing unit comprises a gain module configured to gain the at least two on/off signals.
4. The liquid crystal display assembly of claim 3, wherein the second processing unit further comprises a conversion module for converting RGB data of the incoming image into a grayscale image, a first filter module for histogram filtering, a calibration module for adaptive calibration, a second filter module for spatial filtering, and a correction module for performing an addition correction, wherein the conversion module, the first filter module, the calibration module, the second filter module, the gain module, and the correction module are connected in sequence.
5. The LCD assembly of claim 4, wherein the second processing unit is configured to turn off the ON/OFF signal corresponding to the accessed image area having the gray value less than a predetermined value when the gray value of the accessed image area is less than the predetermined value.
6. A liquid crystal display assembly as claimed in claim 2 wherein the image processing means comprises a field programmable gate array.
7. The liquid crystal display assembly of claim 2, wherein the at least two backlight partitions are each provided with a driving assembly configured to drive the backlight partition to be turned on and off according to the on-off signal; the driving assembly includes a synchronization unit configured to synchronize an on/off signal of the backlight partition with a display signal of a corresponding display partition.
8. The LCD assembly of claim 7, wherein the synchronization unit is configured to maintain a current ON/OFF signal for a first predetermined time before obtaining a subsequent ON/OFF signal; or the image processing device further comprises a time delay device, wherein the time delay device is configured to maintain the current frame of the access image for a second preset time and then acquire the subsequent frame of the access image; the delay device is arranged between the first processing unit and the liquid crystal display layer, and the second preset time is determined according to the time difference between the output signal of the second processing unit and the output signal of the first processing unit.
9. The liquid crystal display assembly of claim 1, wherein the backlight layer comprises a flexible substrate and at least two light emitting elements disposed on the flexible substrate, the liquid crystal display layer being disposed as a curved layer; and/or the backlight layer is arranged in a lamination way with the liquid crystal display layer so that the backlight layer provides direct-type backlight.
10. A running device comprising the liquid crystal display module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940026.4A CN113611251A (en) | 2021-08-16 | 2021-08-16 | Liquid crystal display module and driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110940026.4A CN113611251A (en) | 2021-08-16 | 2021-08-16 | Liquid crystal display module and driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113611251A true CN113611251A (en) | 2021-11-05 |
Family
ID=78308736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110940026.4A Pending CN113611251A (en) | 2021-08-16 | 2021-08-16 | Liquid crystal display module and driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113611251A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2768037Y (en) * | 2004-12-09 | 2006-03-29 | 比亚迪股份有限公司 | LCD for saving backlight power consumption |
| CN101211537A (en) * | 2006-12-31 | 2008-07-02 | 深圳Tcl工业研究院有限公司 | LCD television set backlight control system and method |
| CN101414437A (en) * | 2007-10-19 | 2009-04-22 | 青岛海信电器股份有限公司 | Liquid crystal display method and liquid crystal display device |
| CN101673521A (en) * | 2009-08-18 | 2010-03-17 | 北京巨数数字技术开发有限公司 | Liquid crystal display device and method for processing digital image signal |
| CN102129848A (en) * | 2010-01-18 | 2011-07-20 | 三星电子株式会社 | Liquid crystal display and method of driving the same |
| CN102186273A (en) * | 2011-02-14 | 2011-09-14 | 东南大学 | Time-sharing and sectional controllable field emission backlight device |
| CN104332140A (en) * | 2014-10-28 | 2015-02-04 | 深圳创维－Rgb电子有限公司 | Backlight driving system for regional dimming and regional dimming method |
| CN106782377A (en) * | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
| CN109003583A (en) * | 2018-09-18 | 2018-12-14 | 惠科股份有限公司 | Display device and its driving method |
| CN112419987A (en) * | 2020-11-27 | 2021-02-26 | 京东方科技集团股份有限公司 | Backlight driving method and device and display system |
-
2021
- 2021-08-16 CN CN202110940026.4A patent/CN113611251A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2768037Y (en) * | 2004-12-09 | 2006-03-29 | 比亚迪股份有限公司 | LCD for saving backlight power consumption |
| CN101211537A (en) * | 2006-12-31 | 2008-07-02 | 深圳Tcl工业研究院有限公司 | LCD television set backlight control system and method |
| CN101414437A (en) * | 2007-10-19 | 2009-04-22 | 青岛海信电器股份有限公司 | Liquid crystal display method and liquid crystal display device |
| CN101673521A (en) * | 2009-08-18 | 2010-03-17 | 北京巨数数字技术开发有限公司 | Liquid crystal display device and method for processing digital image signal |
| CN102129848A (en) * | 2010-01-18 | 2011-07-20 | 三星电子株式会社 | Liquid crystal display and method of driving the same |
| CN102186273A (en) * | 2011-02-14 | 2011-09-14 | 东南大学 | Time-sharing and sectional controllable field emission backlight device |
| CN104332140A (en) * | 2014-10-28 | 2015-02-04 | 深圳创维－Rgb电子有限公司 | Backlight driving system for regional dimming and regional dimming method |
| CN106782377A (en) * | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Liquid crystal display device and its driving method |
| CN109003583A (en) * | 2018-09-18 | 2018-12-14 | 惠科股份有限公司 | Display device and its driving method |
| CN112419987A (en) * | 2020-11-27 | 2021-02-26 | 京东方科技集团股份有限公司 | Backlight driving method and device and display system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102243855B (en) | Integrated backlight dimming method and device for enhancing liquid crystal display contrast ratio | |
| US9595229B2 (en) | Local dimming method and liquid crystal display | |
| CN103796380B (en) | Liquid crystal indicator and backlight thereof and light-dimming method | |
| TWI414859B (en) | Controlling apparatus and controlling method applied to a display | |
| JP4960507B2 (en) | Video display device and control device | |
| EP2058792A2 (en) | Liquid crystal display, liquid crystal display module, and method of driving liquid crystal display | |
| WO2017088420A1 (en) | Over-driving control method for local dimming and apparatus therefor | |
| US20100321414A1 (en) | Display device | |
| EP2447764A2 (en) | Liquid crystal display device and drive method for same | |
| CN102013232B (en) | Method of dimming a light source and display apparatus for performing the method | |
| US20090167670A1 (en) | Method of determining luminance values for a backlight of an lcd panel displaying an image | |
| US9336728B2 (en) | System and method for controlling a display backlight | |
| US8400385B2 (en) | Method for enhancing an image displayed on an LCD device | |
| CN102483902B (en) | Liquid crystal display device | |
| CN103718235A (en) | Video display device | |
| US8810504B2 (en) | Brightness compensation method and local dimming circuit and liquid crystal display thereof | |
| US20100002027A1 (en) | Display device and method | |
| US9047828B2 (en) | Liquid crystal display device including signal controllers for driving panel areas and method for driving thereof | |
| CN104167187B (en) | The recognition methods of a kind of wide-screen film display pattern and device | |
| KR20130052298A (en) | Liquid crystal display device driving circuit and method thereof | |
| US20100289811A1 (en) | Dynamic Backlight Control System and Method with Color-Temperature Compensation | |
| CN109949751B (en) | Display brightness adjusting method and device | |
| CN105810156A (en) | Backlight adjustment method and circuit | |
| US11948522B2 (en) | Display device with light adjustment for divided areas using an adjustment coefficient | |
| JP2010519576A (en) | Two-dimensional dimming of illumination members for display devices |
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: 20211105 |
|
| RJ01 | Rejection of invention patent application after publication |