CN109256104A - Display device, display panel voltage source system and its circuit - Google Patents
Display device, display panel voltage source system and its circuit Download PDFInfo
- Publication number
- CN109256104A CN109256104A CN201811397019.9A CN201811397019A CN109256104A CN 109256104 A CN109256104 A CN 109256104A CN 201811397019 A CN201811397019 A CN 201811397019A CN 109256104 A CN109256104 A CN 109256104A
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- display panel
- analog converter
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- 230000005611 electricity Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 3
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 101000893906 Fowl adenovirus A serotype 1 (strain CELO / Phelps) Protein GAM-1 Proteins 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- G09G3/36—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
- 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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The invention belongs to field of display technology, providing a kind of display device, display panel voltage source system and its circuit, display panel voltage source circuit includes power supply chip, is connect with the external power supply, for the external power supply to be converted to first voltage, second voltage；Gamma chip is connect with the power supply chip and the data driving chip, receives the first voltage and the second voltage, and generate gamma electric voltage according to the first voltage and the second voltage；The data-driven cake core has tertiary voltage generation circuit, and the tertiary voltage generation circuit is connect with the gamma chip, generates tertiary voltage according to the gamma electric voltage；Wherein, the first voltage, the second voltage and the tertiary voltage are the operating voltage of the data driving chip.The area for reducing cost, reducing circuit board improves product competitiveness.
Description
Technical field
The invention belongs to field of display technology more particularly to a kind of display devices, display panel voltage source system and its circuit.
Background technique
Thin Film Transistor-LCD (Thin film transistor liquid crystal display, usually
Referred to as TFT-LCD) be most liquid crystal displays one kind, it using thin-film transistor technologies improve image quality.Although
TFT-LCD is collectively referred to as LCD, but it is kind of an active-matrix LCD, is used in TV, flat-panel screens and projector.
The drive system power supply structure and Source Driver IC of traditional thin film transistor-liquid crystal display (drive by data
Dynamic chip) it is that tri- road voltage of HVAA, VDDA and VDDD, gamma chip generation gamma electricity are generated by power supply chip (DC-DC IC)
Then pressure is connected in Source Driver IC by PCB (Printed Circuit Board, printed circuit board) cabling
Portion；Because DC-DC IC needs to generate the voltages such as HVAA, VDDA, VDDD, DC-DC IC design complexity, higher cost, and PCB are caused
Cabling is more, increases PCB surface product and cost.
Therefore, complicated, higher cost that there are power supply chip designs in traditional technical solution, and PCB trace is more, increases
The problem of PCB surface product and cost.
Summary of the invention
The purpose of the present invention is to provide a kind of display panel voltage source circuits, it is intended to solve to exist in traditional technical solution
Power supply chip design is complicated, higher cost, and PCB trace is more, the problem of increasing PCB surface product and cost.
A kind of display panel voltage source circuit, between connection and external power supply and data driving chip, the display panel electricity
Source circuit includes:
Power supply chip is connect with the external power supply, for the external power supply to be converted to first voltage, the second electricity
Pressure；
Gamma chip is connect with the power supply chip and the data driving chip, receives the first voltage and institute
Second voltage is stated, and gamma electric voltage is generated according to the first voltage and the second voltage；
The data-driven cake core has tertiary voltage generation circuit, the tertiary voltage generation circuit and the gamma
Chip connection generates tertiary voltage according to the gamma electric voltage；
Wherein, the first voltage, the second voltage and the tertiary voltage are the work of the data driving chip
Make voltage.
In one embodiment, the tertiary voltage generation circuit includes first resistor, second resistance, first switch tube
And second switch, first input end of the first end of the first resistor as the tertiary voltage generation circuit, described
The second end of second input terminal of the first end of two resistance as the tertiary voltage generation circuit, the first resistor connects institute
State the second end of second resistance, the input terminal of the first switch tube connects the power supply chip, the second switch it is defeated
Enter end ground connection, the output end of the first switch tube connects the output end of the second switch, the control of the first switch tube
End processed connects the control terminal of the second switch, described in the first resistor is connected with the public connecting end of the second resistance
The public connecting end of the control of the control terminal of first switch tube and the second switch, the output end of the first switch tube and
Output end of the public connecting end of the output end of the second switch as the tertiary voltage generation circuit.
In one embodiment, the first switch tube is NPN type triode, and the second switch is positive-negative-positive three
Pole pipe.
In one embodiment, the first switch tube is metal-oxide-semiconductor, and the second switch is metal-oxide-semiconductor.
In one embodiment, the gamma electric voltage includes the road N output voltage, wherein in the output voltage of the road N > 2, N
Any two-way voltage connects the tertiary voltage generation circuit.
In one embodiment, N=18, wherein the 9th road voltage and the 10th road voltage are all connected with the tertiary voltage and produce
Raw circuit.
In one embodiment, the power supply chip is Switching Power Supply integrated regulator.
In one embodiment, the data driving chip further include the first digital analog converter, the second digital analog converter,
First amplifier, the second amplifier, the first load resistance, the second load resistance, first capacitor and the second capacitor；First number
The input terminal of mode converter connects the gamma chip, and the output end of first digital analog converter connects first amplifier
Non-inverting input terminal, the inverting input terminal of first digital analog converter connects the output end of first digital analog converter, institute
It states the first load resistance and the first capacitor is serially connected between the output end and ground of first digital analog converter, described first
The power end of digital analog converter connects the power supply chip, and the ground terminal of first digital analog converter connects the tertiary voltage
The input terminal of generation circuit, second digital analog converter connects the gamma chip, the output of second digital analog converter
End connects the non-inverting input terminal of second amplifier, the inverting input terminal connection of second digital analog converter second number
The output end of mode converter, second load resistance and second capacitance series are in the output of second digital analog converter
Between end and ground, the power end of second digital analog converter connects the tertiary voltage generation circuit, and second digital-to-analogue turns
The ground terminal of parallel operation is grounded.
In addition, additionally provide a kind of display panel voltage source system, the display panel voltage source system include: external power supply,
Above-mentioned display panel voltage source circuit between data driving chip and connection and external power supply and data driving chip.
In addition, additionally providing a kind of display device, the display device includes: above-mentioned display panel voltage source system.
Above-mentioned display panel voltage source circuit, it is defeated using former gamma chip by improving data driving chip interior design
Voltage out is connected to data driving chip power end HVAA by generating tertiary voltage inside tertiary voltage generation circuit
It sets, cancels the tertiary voltage output circuit in power supply chip, reached the area for reducing cost, reducing circuit board, improved product
Competitiveness.
Detailed description of the invention
Fig. 1 is the display panel voltage source electrical block diagram that one embodiment of the invention provides；
Fig. 2 is the exemplary circuit schematic diagram of tertiary voltage generation circuit in display panel voltage source circuit shown in FIG. 1；
Fig. 3 is the partial circuit schematic diagram for the data driving chip that one embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the structural schematic diagram of the display panel voltage source system of present pre-ferred embodiments offer, for the ease of
Illustrate, only the parts related to this embodiment are shown, and details are as follows:
A kind of display panel voltage source system, the display panel voltage source system include: external power supply 40, data driving chip 30
And connection and the display panel voltage source circuit between external power supply 40 and data driving chip 30, circuit of display driving will be outer
Operating voltage needed for portion's power supply 40 is converted to data driving chip 30, to maintain the normal work of data driving chip 30.
Wherein between display panel voltage source circuit connection and external power supply 40 and data driving chip 30, display panel electricity
Source circuit includes power supply chip 10, gamma chip 20 and the tertiary voltage generation circuit 31 in data driving chip 30.
Power supply chip 10 is connect with external power supply 40, for external power supply 40 to be converted to the electricity of first voltage VDDA and second
Pressure VDDD, first voltage VDDA and second voltage VDDD are exported to gamma chip 20 and data driving chip 30, on the one hand, are mentioned
On the other hand the input voltage of gamma chip 20 is provided for operating voltage needed for data driving chip 30.One implements wherein
In example, power supply chip can be Switching Power Supply integrated regulator.
Gamma chip 20 is connect with power supply chip 10 and data driving chip 30, receives the electricity of first voltage VDDA and second
VDDD is pressed, and gamma electric voltage is generated according to first voltage VDDA and second voltage VDDD.Gamma electric voltage includes the road N output voltage, N
Any two-way voltage in the output voltage of the road > 2, N connects tertiary voltage generation circuit.In one example, gamma chip 20 connects
First voltage VDDA and second voltage VDDD is received, and generates GAM1~GAM18 and amounts to 18 groups of voltages, then passes through circuit board trace
It is connected to data driving chip 30, by 18 groups of voltage outputs to data driving chip 30.
Display panel voltage source circuit further includes having tertiary voltage generation circuit 31, third set on data driving chip 30
Voltage generation circuit 31 is connect with gamma chip 20, generates tertiary voltage HVAA according to gamma electric voltage.Wherein, the first above-mentioned electricity
Pressure VDDA, second voltage VDDD and tertiary voltage HVAA are the operating voltage of data driving chip 30.
As shown in Fig. 2, in one example, data driving chip 30 is according to the 9th road voltage GAM9 of access and the 10th tunnel
Voltage GAM10 two-way voltage is connected to tertiary voltage generation circuit 31, to produce tertiary voltage HVAA.Wherein, third electricity
Generation circuit 31 is pressed to include first resistor R1, second resistance R2, first switch tube Q1 and second switch Q2, first resistor R1's
The first end of first input end of the first end as tertiary voltage generation circuit 31, second resistance R2 generates electricity as tertiary voltage
Second input terminal on road 31, the second end of the second end connection second resistance R2 of first resistor R1, the input of first switch tube Q1
End connection power supply chip 10, the output end of the input end grounding of second switch Q2, first switch tube Q1 connect second switch
The output end of Q2, the control terminal of the control terminal connection second switch Q2 of first switch tube Q1, first resistor R1 and second resistance
The public connecting end of the control terminal of the control terminal and second switch Q2 of the public connecting end connection first switch tube Q1 of R2, first
The public connecting end of the output end of the output end and second switch Q2 of switching tube Q1 is as the defeated of tertiary voltage generation circuit 31
Outlet.
Further, first switch tube Q1 is NPN type triode, and second switch Q2 is PNP type triode.First switch tube
The emitter of Q1 connects power supply chip 10, the emitter ground connection of second switch Q2, the collector connection of first switch tube Q1 the
The collector of two switching tube Q2, the base stage of the base stage connection second switch Q2 of first switch tube Q1, the base of first switch tube Q1
Pole connects the public connecting end of first resistor R1 and second resistance R2 with the public connecting end of the base stage of second switch Q2, and first
The public connecting end of the collector of the collector and second switch Q2 of switching tube Q1 is as the defeated of tertiary voltage generation circuit 31
Outlet.In other embodiments, first switch tube Q1 and second switch Q2 can by realize same function metal-oxide-semiconductor or other
Electronic switching device replaces.
As shown in figure 3, data driving chip 30 further includes the first digital analog converter 32, the second digital analog converter 33, first
Amplifier 34, the second amplifier 35, the first load resistance R3, the second load resistance R4, first capacitor C1 and the second capacitor C2；The
The input terminal of one digital analog converter 32 connects gamma chip 20, and the output end of the first digital analog converter 32 connects the first amplifier 34
Non-inverting input terminal, the inverting input terminal of the first digital analog converter 32 connects the output end of the first digital analog converter 32, and first is negative
Resistance R3 and first capacitor C1 is carried to be serially connected between the output end and ground of the first digital analog converter 32, the first digital analog converter 32
Power end connects power supply chip 10, and the ground terminal of the first digital analog converter 32 connects tertiary voltage generation circuit 31, the second digital-to-analogue
The input terminal of converter 33 connects gamma chip 20, and the output end of the second digital analog converter 33 connects the same phase of the second amplifier 35
Input terminal, the inverting input terminal of the second digital analog converter 33 connect the output end of the second digital analog converter 33, the second load resistance
R4 and the second capacitor C2 are serially connected between the output end and ground of the second digital analog converter 33, the power end of the second digital analog converter 33
Connect tertiary voltage generation circuit 31, the ground terminal ground connection of the second digital analog converter 33.The input terminal of first digital analog converter 32
It inputs GAM1~GAM9 and amounts to 9 road voltages, input terminal input GAM10~GAM18 of the second digital analog converter 33 amounts to 9 roads electricity
It presses, tertiary voltage HVAA needed for above-mentioned circuit is mentioned by tertiary voltage generation circuit 31 built-in in data driving chip 30
For without configuring tertiary voltage HVAA unit on power supply chip 10, not only reducing the design cost of power supply chip 10 and setting
Complexity is counted, while reducing the wiring of circuit board, reduces production cost.
Based on above-mentioned display panel voltage source system, the present invention also provides a kind of display device, which includes:
Above-mentioned display panel voltage source system.
To sum up, the embodiment of the invention provides a kind of display panel voltage source system and its display panel voltage source circuits, this is aobvious
Show that panel power system includes: external power supply 40, data driving chip 30 and connection and external power supply 40 and data-driven core
Display panel voltage source circuit between piece 30, the display panel voltage source circuit include power supply chip 10, gamma chip 20 and set
Tertiary voltage generation circuit 31 in data driving chip 30.By modifying 30 interior design of data driving chip, original is used
The voltage that gamma chip 20 exports is connected to data-driven by generating tertiary voltage HVAA inside tertiary voltage generation circuit 31
The tertiary voltage HVAA output circuit in power supply chip 10 is cancelled in 30 position power end HVAA of chip, and having reached reduces cost, subtracts
The area of small circuit board improves product competitiveness.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of display panel voltage source circuit, connect with external power supply and data driving chip, which is characterized in that the display surface
Plate power circuit includes:
Power supply chip is connect with the external power supply, for the external power supply to be converted to first voltage, second voltage；
Gamma chip is connect with the power supply chip and the data driving chip, receives the first voltage and described
Two voltages, and gamma electric voltage is generated according to the first voltage and the second voltage；
Tertiary voltage generation circuit, the tertiary voltage generation circuit is connect with the gamma chip, according to the gamma electric voltage
Tertiary voltage is generated, the tertiary voltage generation circuit is set in the data-driven cake core；
The first voltage, the second voltage and the tertiary voltage are the operating voltage of the data driving chip.
2. display panel voltage source circuit as described in claim 1, which is characterized in that the tertiary voltage generation circuit includes the
The first end of one resistance, second resistance, first switch tube and second switch, the first resistor is produced as the tertiary voltage
The first input end of raw circuit, second input terminal of the first end of the second resistance as the tertiary voltage generation circuit,
The second end of the first resistor connects the second end of the second resistance, and the input terminal of the first switch tube connects the electricity
Source chip, the input end grounding of the second switch, the output end of the first switch tube connect the second switch
Output end, the control terminal of the first switch tube connect the control terminal of the second switch, the first resistor and described
The public connecting end of two resistance connects the commonly connected of the control of the control terminal and the second switch of the first switch tube
The public connecting end of the output end of end, the output end of the first switch tube and the second switch is as the tertiary voltage
The output end of generation circuit.
3. display panel voltage source circuit as claimed in claim 2, which is characterized in that the first switch tube is three pole of NPN type
Pipe, the second switch are PNP type triode.
4. display panel voltage source circuit as claimed in claim 2, which is characterized in that the first switch tube is metal-oxide-semiconductor, described
Second switch is metal-oxide-semiconductor.
5. display panel voltage source circuit as described in claim 1, which is characterized in that the gamma electric voltage includes the road N output electricity
Pressure, wherein any two-way voltage in the output voltage of the road N > 2, N connects the tertiary voltage generation circuit.
6. display panel voltage source circuit as claimed in claim 5, which is characterized in that N=18, wherein the 9th road voltage and the 10th
Road voltage is all connected with the tertiary voltage generation circuit.
7. display panel voltage source circuit as described in claim 1, which is characterized in that the power supply chip is Switching Power Supply pressure stabilizing
Integrated circuit.
8. display panel voltage source circuit as described in claim 1, which is characterized in that the data driving chip further includes first
Digital analog converter, the second digital analog converter, the first amplifier, the second amplifier, the first load resistance, the second load resistance,
One capacitor and the second capacitor；The input terminal of first digital analog converter connects the gamma chip, first digital-to-analogue conversion
The output end of device connects the non-inverting input terminal of first amplifier, and the inverting input terminal of first digital analog converter connects institute
The output end of the first digital analog converter is stated, first load resistance and the first capacitor are serially connected with first digital-to-analogue conversion
Between the output end and ground of device, the power end of first digital analog converter connects the power supply chip, and first digital-to-analogue turns
The ground terminal of parallel operation connects the tertiary voltage generation circuit, and the input terminal of second digital analog converter connects the gamma core
Piece, the output end of second digital analog converter connect the non-inverting input terminal of second amplifier, second digital-to-analogue conversion
The inverting input terminal of device connects the output end of second digital analog converter, second load resistance and the second capacitor string
It is connected between the output end and ground of second digital analog converter, the power end of second digital analog converter connects the third
Voltage generation circuit, the ground terminal ground connection of second digital analog converter.
9. a kind of display panel voltage source system, which is characterized in that the display panel voltage source system includes: external power supply, data
Being shown as described in any item of the claim 1 to 8 between driving chip and connection and external power supply and data driving chip
Show panel power circuit.
10. a kind of display device, which is characterized in that the display device includes: display panel voltage source as claimed in claim 9
System.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397019.9A CN109256104B (en) | 2018-11-22 | 2018-11-22 | Display device, display panel power supply system and circuit thereof |
| PCT/CN2018/120807 WO2020103231A1 (en) | 2018-11-22 | 2018-12-13 | Display device, and display panel power source system and circuit |
| US16/312,375 US10742119B2 (en) | 2018-11-22 | 2018-12-13 | Display device, display panel power supply system and display panel power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397019.9A CN109256104B (en) | 2018-11-22 | 2018-11-22 | Display device, display panel power supply system and circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109256104A true CN109256104A (en) | 2019-01-22 |
| CN109256104B CN109256104B (en) | 2024-04-12 |
Family
ID=65042053
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811397019.9A Active CN109256104B (en) | 2018-11-22 | 2018-11-22 | Display device, display panel power supply system and circuit thereof |
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| Country | Link |
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| CN (1) | CN109256104B (en) |
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| CN110827784A (en) * | 2019-10-24 | 2020-02-21 | 深圳市华星光电技术有限公司 | Drive circuit and control method thereof |
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| US11527213B2 (en) | 2019-01-30 | 2022-12-13 | HKC Corporation Limited | Driving method of display panel for reducing viewing angle color deviation and display device |
| CN110176206A (en) * | 2019-05-06 | 2019-08-27 | 重庆惠科金渝光电科技有限公司 | Driving circuit, driving circuit link information determine method and display device |
| WO2020224587A1 (en) * | 2019-05-06 | 2020-11-12 | 重庆惠科金渝光电科技有限公司 | Drive circuit, method for determining connection information of drive circuit and display device |
| CN110176206B (en) * | 2019-05-06 | 2021-06-18 | 重庆惠科金渝光电科技有限公司 | Drive circuit, drive circuit connection information determination method, and display device |
| US11488504B2 (en) | 2019-05-06 | 2022-11-01 | Chongqing Hkc Optoelectronics Technology Co., Ltd. | Driving circuit, method for determining connection information of driving circuit and display device |
| CN110827784A (en) * | 2019-10-24 | 2020-02-21 | 深圳市华星光电技术有限公司 | Drive circuit and control method thereof |
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