CN209103798U - The backlight circuit and display device of display device - Google Patents
The backlight circuit and display device of display device Download PDFInfo
- Publication number
- CN209103798U CN209103798U CN201822092852.4U CN201822092852U CN209103798U CN 209103798 U CN209103798 U CN 209103798U CN 201822092852 U CN201822092852 U CN 201822092852U CN 209103798 U CN209103798 U CN 209103798U
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- Prior art keywords
- module
- display device
- backlight
- light emitting
- main control
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- 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
-
- 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
-
- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B44/00—Circuit arrangements for operating electroluminescent light sources
Abstract
The utility model relates to a kind of backlight circuit of display device and display devices.The backlight circuit of display device includes light emitting module, programmable module and main control module；The programmable module memory module configured with display device is connect, and is connect with main control module, is provided to main control module for reading the backlight drive data stored in the configured memory module of display device, and by backlight drive data；Light emitting module is connect with main control module, for providing light emitting source；Main control module is used to control the light emission luminance of light emitting module according to backlight drive data.By the way that backlight drive data are stored in a configured memory module of display device, the cost that traditional backlight circuit needs independent design memory module is saved.
Description
Technical field
The utility model relates to field of liquid crystal display, backlight circuit and display dress more particularly to a kind of display device
It sets.
Background technique
Liquid crystal display device is the main product of current FPD, since liquid crystal itself does not shine, to be shown,
It needs to arrange in pairs or groups with backlight.And the need of work of backlight is controlled by backlight drive circuit, specifically, backlight drive circuit needs
The driving parameter that backlit operation is read from memory, to control backlit operation.In traditional backlight circuit, independent deposit is designed
Reservoir needs to occupy additional PCB (Printed Circuit Board, printed circuit board) resource, and hardware cost is caused to increase.
Utility model content
Based on this, it is necessary to aiming at the problem that the independent memory of design increases cost with additional PCB resource, provide one
The backlight circuit of kind display device:
A kind of backlight circuit of display device, backlight circuit include: light emitting module, programmable module and main control module；
The programmable module memory module configured with display device is connect, and is connect with main control module, for reading
The backlight drive data stored in the configured memory module of display device, and backlight drive data are provided to main control module；
Light emitting module is connect with main control module, for providing light emitting source；Main control module is used for according to backlight drive data control
The light emission luminance of light emitting module processed.
The configured memory module of display device includes timing control storage unit in one of the embodiments,.
Timing control storage unit includes nonvolatile semiconductor memory member in one of the embodiments,.
Nonvolatile semiconductor memory member includes band Electrically Erasable Programmable Read-Only Memory in one of the embodiments,.
Light emitting module includes light emitting diode in one of the embodiments,.
Main control module includes microprocessing unit in one of the embodiments,.
In one of the embodiments, programmable module include for by backlight drive data conversion at simulation backlight signal
D/A conversion unit, and to main control module provide backlight calibration voltage voltage correction unit.
Main control module includes voltage feedback unit, voltage comparison unit and control unit in one of the embodiments,；
Voltage feedback unit is connect with light emitting module, for extracting the feedback voltage of light emitting module；Voltage comparison unit respectively with voltage
Feedback unit is connected with voltage correction unit, for comparing feedback voltage and backlight calibration voltage；Control unit and shine
Module connection, for adjusting the electric current of light emitting module.
Control unit includes the transistor in parallel with light emitting module in one of the embodiments,.
A kind of display device is also provided, including a kind of backlight circuit of display device of any of the above-described embodiment.
By being stored in backlight drive data, one display device is configured to deposit the backlight circuit of above-mentioned display device
It stores up in module, so that the traditional design for needing two memory modules be changed into the new design for only needing a memory module, i.e.,
Backlight drive data and other data of display device are collectively stored in the configured memory of display device, realizes to share and deposit
Reservoir saves the hardware resource of memory module occupancy, saves cost.
Detailed description of the invention
Fig. 1 is the functional block diagram of backlight circuit in the utility model one embodiment；
Fig. 2 is the functional block diagram of backlight circuit in the utility model one embodiment；
Fig. 3 is the circuit diagram of backlight circuit in the utility model one embodiment.
Specific embodiment
The purpose of this utility model, technical solution and technical effect in order to better understand, below in conjunction with attached drawing and reality
It applies example and further explaining illustration is carried out to the utility model.It states simultaneously, embodiments described below is only used for explaining this
Utility model is not used to limit the utility model.
The utility model provides a kind of backlight circuit of display device, as shown in Figure 1, backlight circuit includes: light emitting module
1, programmable module 2 and main control module 3.Wherein light emitting module 1 is for providing light emitting source；Programmable module 2 is deposited for reading
The backlight drive data that store in storage module 4, and backlight drive data are provided to main control module 3, wherein memory module 4 is
The configured memory module of display device；Main control module 3 is used to control the luminance of light emitting module 1 according to backlight drive data
Degree.Wherein, in backlight drive design, light emitting diode (LED, Light Emitting is can be used in light emitting module 1
Diode) be used as luminescence unit, Cold Cathode Fluorescent pipe also can be used, can also be osram lamp, as long as can luminous lighting be
Can, and its brightness control may be implemented by adjusting electric current in luminescence unit.Wherein, optionally, light emitting diode is electric current device
Part, luminous intensity are positively correlated with the electric current flowed through, and therefore, backlight circuit is realized by the electric current that light emitting diode is flowed through in control
Control the luminous intensity of illuminating circuit.Programmable module 2 is then by reading the backlight drive being stored in advance in a storage module
Data are input in backlight circuit, realize the purpose of backlight control.The processing list with processing function can be selected in main control module
Member, such as microprocessor, single-chip microcontroller or central processing unit etc..In traditional backlight design, memory module is individually designed
, it needs to occupy additional storage chip and printed circuit board resource, causes the increase of cost.Due to also needing in a display device
Want memory module for store show driving data, display circuit passes through in the configured memory module 4 of reading display device
Show that driving data realizes display drive control.The configured memory module 4 of display device, can be for providing timing control
Timing control storage unit, the storage list being also possible in the control circuits such as the storage unit in the power supply module of display device
Member, as long as memory configured in display device and that backlight drive data can be stored.In the present embodiment, will
The configured memory module 4 of the memory module and display device of backlight circuit carries out shared design, by backlight drive data and shows
Show that driving design is collectively stored in a memory module, to save a memory module, including saves and deposit accordingly
PCB surface product involved by chip and design corresponding circuits part is stored up, cost is saved.
The configured memory module 4 of display device is to be arranged in time sequence control device in one of the embodiments,
Band Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically in (TCON, Timing Controller)
Erasable Programmable read only memory).Wherein, due to needing memory to backlight in backlight circuit
Driving data is stored, and needs to redesign and determine backlight drive data when being directed to different backlighting schemes；On the other hand,
In display circuit, it is just configured with corresponding memory for carrying out the PCB design of TCON itself of timing control to display, mostly
In number situations, after liquid crystal display panel completes, corresponding display driving data and sequential control circuit with regard to it has been determined that
It does not need again again individually designed.Therefore, in the present embodiment, memory backlight drive data being stored on TCON
In, save the area of design backlight drive memory PCB.
Wherein, the memory of TCON is optionally EEPROM, also includes read-only storage as more optinal plans certainly
Device (ROM, Read-Only Memory), programmable read only memory (PROM, Programmable Read-Only
Memory), Erarable Programmable Read only Memory (EPROM, Erasable Programmable Read-Only Memory)
Or the nonvolatile memories such as flash memory.Certainly, the present embodiment only describes and arrives backlight drive data storage
The display circuit of situation in the EEPROM of TCON, i.e. backlight circuit and display device shares the EEPROM of TCON, realizes one
EEPROM completes the function of two modules.Alternatively it is also possible to display driving data be stored into backlight circuit memory, i.e.,
The technical effect for saving an EPPROM also may be implemented in the EEPROM of backlight circuit and display circuit sharing backlight circuit.
In one of the embodiments, as shown in Fig. 2, programmable module 2 include for by backlight drive data conversion at
The D/A conversion unit 21 of backlight signal is simulated, and provides the voltage correction unit 22 of backlight calibration voltage to main control module 3.
Programmable module 2 is provided with D/A conversion unit (DAC, Digital to analog converter), D/A conversion unit point
It is not connect with main control module and the connection of memory that display device is configured, backlight digitized in memory EEPROM is driven
Dynamic data conversion is provided at analog quantity to main control module 3, carries out light emitting control.
Main control module 3 includes voltage feedback unit 31, voltage comparison unit 32 and control in one of the embodiments,
Unit 33；Voltage feedback unit 31 is connect with light emitting module 1, for extracting the feedback voltage of light emitting module 1；Voltage comparison unit
32 connect with voltage feedback unit 31 and voltage correction unit 22 respectively, for feedback voltage and backlight calibration voltage to be done ratio
Compared with；Control unit 33 is connect with light emitting module 1, for adjusting the electric current of light emitting module 1.Main control module 3 is optionally with having
The central processing unit or microprocessor of data-handling capacity, main control module 3 include for providing the feedback voltage of light emitting module 1
Voltage feedback unit 31, and the voltage comparison unit 32 for comparing feedback voltage and calibration voltage.Memory module 4
It is the configured memory module of display device.Wherein, in the design of mainstream backlight drive, light emitting module 1 is mainly using luminous two
Pole pipe is as luminescence unit, and light emitting diode is current device, and luminous intensity is positively correlated with the electric current flowed through, therefore, back
Optical circuit realizes the luminous intensity of control illuminating circuit by the electric current that light emitting diode is flowed through in control.Programmable module 2 is then
By reading the backlight drive data being stored in advance in a storage module, it is input in backlight circuit, realizes the mesh of backlight control
's.The backlight drive data stored in memory module EEPROM be it is digitized, simulated electricity ginseng is needed in backlight circuit
Number driving light emitting module 1 shines, and programmable module 2 is provided with D/A conversion unit, by back digitized in memory EEPROM
Optical drive data conversion is provided at analog quantity to main control module 3, carries out light emitting control.Main control module 3 includes luminous for extracting
The voltage feedback unit 31 of 1 feedback voltage of module, the voltage comparison unit 32 that feedback voltage is made comparisons with calibration voltage, and
For adjusting the control unit 33 of the electric current of light emitting module 1.Optionally, as shown in figure 3, light emitting module 1 includes that several are in parallel
LED light string, each lamp string passes through resistance R and is grounded, and voltage feedback unit 31 is anti-by the voltage of the remote ground terminal of resistance R
It is fed to voltage comparison unit 32, voltage comparison unit 32 compares feedback voltage and calibration voltage, obtains master after comparison result
Control module 3 flows through the electric current in each lamp string according to comparison result control, realizes brightness control.Control unit 33 includes and shines
The switching tube in parallel of module 1, optionally, switching tube can be transistor.Transistor and LED light string earth, control
End processed is connect with the adjustable side of main control module 3, by changing the voltage that is added in control terminal, can to LED light string into
Row shunts, to realize the adjusting to light emission luminance.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of backlight circuit of display device, which is characterized in that the backlight circuit includes: light emitting module, programmable module
And main control module；
The programmable module memory module configured with display device is connect, and is connected to the main control module, and is used for
The backlight drive data stored in the configured memory module of the display device are read, and the backlight drive data are provided
To the main control module；
The light emitting module is connected to the main control module, for providing light emitting source；The main control module is used for according to the back
Optical drive data control the light emission luminance of the light emitting module.
2. a kind of backlight circuit of display device according to claim 1, which is characterized in that the display device is configured
Memory module includes timing control storage unit.
3. a kind of backlight circuit of display device according to claim 2, which is characterized in that the timing control storage unit
Including nonvolatile semiconductor memory member.
4. a kind of backlight circuit of display device according to claim 3, which is characterized in that the nonvolatile semiconductor memory member
Including band Electrically Erasable Programmable Read-Only Memory.
5. a kind of backlight circuit of display device according to claim 1, which is characterized in that the light emitting module includes shining
Diode.
6. a kind of backlight circuit of display device according to claim 1, which is characterized in that the main control module includes micro- place
Manage unit.
7. a kind of backlight circuit of display device according to claim 1, which is characterized in that the programmable module includes using
Back is provided in the D/A conversion unit by the backlight drive data conversion at simulation backlight signal, and to the main control module
The voltage correction unit of optical alignment voltage.
8. a kind of backlight circuit of display device according to claim 7, which is characterized in that the main control module includes voltage
Feedback unit, voltage comparison unit and control unit；The voltage feedback unit is connect with the light emitting module, for extracting
The feedback voltage of the light emitting module；The voltage comparison unit respectively with the voltage feedback unit and the voltage correction list
Member connection, for comparing the feedback voltage and the backlight calibration voltage；Described control unit and the light emitting module
Connection, for adjusting the electric current of the light emitting module.
9. a kind of backlight circuit of display device according to claim 8, which is characterized in that described control unit includes and institute
State the transistor of light emitting module parallel connection.
10. a kind of display device, which is characterized in that including the described in any item backlight circuits of claim 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092852.4U CN209103798U (en) | 2018-12-13 | 2018-12-13 | The backlight circuit and display device of display device |
| PCT/CN2019/071246 WO2020118832A1 (en) | 2018-12-13 | 2019-01-11 | Backlight circuit of display device, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092852.4U CN209103798U (en) | 2018-12-13 | 2018-12-13 | The backlight circuit and display device of display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209103798U true CN209103798U (en) | 2019-07-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822092852.4U Active CN209103798U (en) | 2018-12-13 | 2018-12-13 | The backlight circuit and display device of display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209103798U (en) |
| WO (1) | WO2020118832A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100280173B1 (en) * | 1998-02-17 | 2001-02-01 | 구자홍 | Device and method for displaying backlight usage time of LCD monitor |
| US7057359B2 (en) * | 2003-10-28 | 2006-06-06 | Au Optronics Corporation | Method and apparatus for controlling driving current of illumination source in a display system |
| CN101937654A (en) * | 2010-09-27 | 2011-01-05 | 彩虹集团公司 | LED backlight source device with brightness adaptive function and driving method thereof |
| CN102314838B (en) * | 2011-09-29 | 2014-05-07 | 福州大学 | Method for controlling direct-type LED backlight uniformity and system thereof |
-
2018
- 2018-12-13 CN CN201822092852.4U patent/CN209103798U/en active Active
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2019
- 2019-01-11 WO PCT/CN2019/071246 patent/WO2020118832A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2020118832A1 (en) | 2020-06-18 |
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