CN109300440A - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- CN109300440A CN109300440A CN201811193801.9A CN201811193801A CN109300440A CN 109300440 A CN109300440 A CN 109300440A CN 201811193801 A CN201811193801 A CN 201811193801A CN 109300440 A CN109300440 A CN 109300440A
- Authority
- CN
- China
- Prior art keywords
- data line
- display device
- panel
- detecting
- drive system
- 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.)
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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
- G09G3/36—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
-
- 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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- 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
- G09G3/3685—Details of drivers for data electrodes
Abstract
The present invention provides a kind of display device, it includes panel and drive system, the drive system is while driving panel realizes corresponding function, also whether there is line short between detection data line, and anti-molten screen strategy is executed when detecting line short, the molten screen of display device is prevented, data line short circuit of the existing technology is solved and causes display device molten the technical issues of shielding.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of display devices.
Background technique
With the development of display technology, the screen size of the display devices such as mobile phone is increasing, display resolution
It is higher and higher, display device inner panel, such as display panel pixel or touch panel the corresponding function of touch control electrode panel
Energy element number is also more and more, and corresponding data line quantity is also more and more；But frame of display device etc. is more and more narrow,
This results in the distance between data line shorter and shorter, and short circuit is increasingly easy between data line.
After data line short circuit, there is molten screen danger in display device, can if display device still continues working 5 seconds or so
Lead to the molten screen of display device.
I.e. the prior art there is technical issues that data line short circuit causes display device molten.
Summary of the invention
The present invention provides a kind of display device, causes the molten screen of display device to solve data line short circuit of the existing technology
The technical issues of.
To solve the above problems, technical solution provided by the invention is as follows:
The present invention provides a kind of display device comprising:
Panel；
Drive system connects the functional unit in the panel by data line, for driving the panel to work；
Power-supply management system is used for output supply voltage；
Wherein, the drive system is also used to detect whether occur line short between the data line, and is detecting
Anti- molten screen strategy is executed when line short, prevents the molten screen of the display device.
In display device of the invention, the drive system includes source electrode driver, and the source electrode driver includes:
First gray scale voltage output point, for inputting the first gray scale voltage to the first data line；
Second gray scale voltage output point, for inputting the second gray scale voltage to the second data line；First gray scale voltage
It is opposite with the second gray scale voltage positive-negative polarity；
Current detecting point, for detecting in the first gray scale voltage output point and the second gray scale voltage output point
At least one whether there is electric current, and when detecting electric current, be determined as detecting line short.
In display device of the invention, the power-supply management system includes an interrupt pin；The current detecting point exists
When detecting electric current, interrupt signal is sent to the interrupt pin；The power-supply management system is detecting the interrupt signal
Stop output supply voltage.
In display device of the invention, the interrupt pin includes switch pin.
In display device of the invention, the current detecting point is connect with the switch pin by a protective resistance
Pull-up voltage；When detecting electric current, the detection signal of output is overturn the current detecting point, forms the interrupt signal；It is examining
When surveying signal overturning, the voltage signal overturning of the switch pin, the power-supply management system is detecting the voltage signal
Stop output supply voltage after overturning.
In display device of the invention, the drive system includes sequence controller, the sequence controller be used for
The source electrode driver output control signal, the control signal includes the effective display area domain being alternately present and blank section；
Whether the source electrode driver is there is line short between detection data line in the blank section.
In display device of the invention, the panel includes display panel and touch panel, and the drive system is used for
It detects and whether occurs line short between the data line of the display panel, and/or the data for detecting the touch panel
Whether there is line short between line.
In display device of the invention, the panel only includes touch-control display panel, and the drive system is for detecting
Between the display layer data line of the touch-control display panel, between touch control layer data line and display layer data line and touch control layer
Whether there is line short between data line.
In display device of the invention, whether route occur short for detecting between adjacent data line for the drive system
Road.
In display device of the invention, the drive system is set in the fringe region of the panel for detecting
Whether there is line short between adjacent data line.
The invention has the benefit that drive system is in addition to conventional driving in display device provided by the present invention
Panel is realized except corresponding function, also detects whether occur line short between the data line, and detecting that route is short
Anti- molten screen strategy is executed when road, prevents the molten screen of the display panel, solves data line short circuit of the existing technology and cause to show
Showing device melts the technical issues of screen.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of embodiment or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only some of invention
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram of display device provided by the invention；
Fig. 2 is the circuit diagram of display device provided by the invention；
Fig. 3 is the first schematic diagram of panel provided by the invention；
Fig. 4 is second of schematic diagram of panel provided by the invention；
Fig. 5 is the time diagram of display device provided by the invention.
Specific embodiment
The explanation of following embodiment is referred to the additional illustration, the particular implementation that can be used to implement to illustrate the present invention
Example.The direction term that the present invention is previously mentioned, such as [on], [under], [preceding], [rear], [left side], [right side], [interior], [outer], [side]
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the present invention, rather than to
The limitation present invention.The similar unit of structure is with being given the same reference numerals in the figure.
The present invention causes display device molten the technical issues of shielding for data line short circuit of the existing technology；The present embodiment
It is able to solve the defect.
Panel in the display devices such as existing mobile phone includes two kinds of implementations: assembled panel as shown in Figure 3, display surface
After plate and each self-forming of touch panel, it is overlapped combination and obtains panel；Integrated molding touch-control display panel as shown in Figure 4；
The present invention is described for both design methods.
As shown in Figure 1, display device provided by the invention comprising:
Panel 11；
Drive system 12 connects the functional unit in the panel by data line, for driving the panel to work；
Power-supply management system 13 is used for output supply voltage；
Wherein, the drive system 12 is also used to detect whether occur line short between the data line, and is detecting
Anti- molten screen strategy is executed when to line short, prevents the molten screen of the display device.
In one embodiment, as shown in Fig. 2, the drive system 12 includes source electrode driver 121, the source drive
Device 121 includes:
First gray scale voltage output point 1211, such as gamma5 gray scale voltage output point, for defeated to the first data line S1
Enter the first gray scale voltage, such as gamma5 gray scale voltage；
Second gray scale voltage output point 1212, such as gamma10 gray scale voltage output point, for defeated to the second data line S2
Enter the second gray scale voltage, such as gamma10 gray scale voltage；
Current detecting point 1213, for detecting the first gray scale voltage output point and the second gray scale voltage output point
At least one of whether there is electric current, and when detecting electric current, be determined as detecting line short.
In one embodiment, first gray scale voltage is opposite with the second gray scale voltage positive-negative polarity；
Source electrode driver 121 generally comprises 256 gray scale voltage output points, and the present invention therefrom selects 2 positive-negative polarity phases
Anti- gray scale voltage output point, such as selection two gray scale voltage output points of gamma10 and gamma5.
Current detecting point 1213 can be the ammeter of uA rank, can be with the electric current inside accurate detection to circuit, only
It needs to be arranged in a front end in two gray scale voltage output points of gamma10 and gamma5, such as shown in Fig. 2, is arranged
In the front end of second gray scale voltage output point 1212 this gray scale voltage output point.
In one embodiment, as shown in Fig. 2, the power-supply management system PMIC13 includes an interrupt pin 131；It is described
Current detecting point 1213 sends interrupt signal when detecting electric current, to the interrupt pin 131；The power-supply management system 13
Detecting the interrupt signal stopping output supply voltage.
In one embodiment, the interrupt pin 131 can be switch pin EN pin etc..
In one embodiment, as shown in Fig. 2, current detecting point 1213 and the switch pin 131 are protected by one
Protect pull-up voltage VDD in resistance R connection；When detecting electric current, the detection signal SRF of output is turned over the current detecting point 1213
Turn, forms the interrupt signal；When detecting signal overturning, the voltage signal V overturning of the switch pin, the power management
System stops output supply voltage after detecting the voltage signal overturning.
In one embodiment, upper pull-up voltage VDD can be the voltages such as 1.2V.
In one embodiment, as shown in Fig. 2, the drive system 12 includes sequence controller 122, the timing control
Device 122 be used for the source electrode driver export control signal SFC, the control signal SFC include be alternately present it is effective show
Show region and blank section；Whether the source electrode driver 121 is there is route between detection data line in the blank section
Short circuit.
In one embodiment, described as shown in figure 3, the panel 11 includes display panel 111 and touch panel 112
Drive system 12 is used to detect between the data line of the display panel 111 whether line short occur.
In one embodiment, described as shown in figure 3, the panel 11 includes display panel 111 and touch panel 112
Drive system 12 is used to detect between the data line of the touch panel 112 whether line short occur.
In one embodiment, described as shown in figure 3, the panel 11 includes display panel 111 and touch panel 112
Drive system 12 is used to detect whether occur line short between the data line of the display panel 111, and the detection touching
It controls between the data line of panel 112 and whether line short occurs.
In one embodiment, as shown in figure 4, the panel includes touch-control display panel 113, the touch-control display panel
113 include 1132 data line of 1131 data line of display layer and touch control layer.
In one embodiment, the drive system 12 is used to detect the display layer 1131 of the touch-control display panel 113
Whether there is line short between data line.
In one embodiment, the drive system 12 is used to detect the touch control layer 1132 of the touch-control display panel 113
Whether there is line short between data line.
In one embodiment, the drive system 12 is used to detect the display layer 1131 of the touch-control display panel 113
Whether there is line short between 1132 data line of data line and touch control layer.Since in touch-control display panel, display layer 1131
It is also only easy to happen short circuit every one layer of organic layer between touch control layer 1132, needs to carry out short-circuit detecting.
In one embodiment, in order to accelerate to detect speed, only adjacent data line is detected, this is because phase
Adjacent data line is easier short circuit occur, at this point, the drive system is for detecting between adjacent data line whether route occur
Short circuit.
In one embodiment, in order to further speed up detection speed, only to the adjacent data line in face plate edge region
It is detected, this is because the distance between the adjacent data line in face plate edge region is narrower, it is easier to there is short circuit,
In display device of the invention, the drive system is for detecting the adjacent data line being set in the fringe region of the panel
Between whether there is line short.
Drive system 12 is also used to when detecting line short, feeds back alerting signal, place to the processor of display device
Device control display device is managed by modes such as resonant, flashing lights, user's display device is reminded to there is molten screen danger.
In one embodiment, the drive system is also used to when detecting line short, to the display device
Processor feeds back alerting signal, and the processor reminds user to there is molten screen danger for controlling the display device.
In one embodiment, the processor reminds user to deposit for controlling the display device by resonant mode
In molten screen danger.
In one embodiment, the processor reminds user to deposit for controlling the display device by flashing light mode
In molten screen danger.
Drive system 12 is also used to when detecting line short, to the processor feedback indicator signal of display device, place
The corresponding problem data line of id signal (there are 2 data lines of short circuit problem) is gone to enable by reason device, and drive system does not give this
The corresponding functional unit of problem data line a bit, such as pixel, touch control unit provide voltage driving signal, also can solve so molten
Screen problem.
In one embodiment, the drive system is also used to when detecting line short, to the display device
Processor feedback indicator signal, the processor is for removing to enable the corresponding problem data line of id signal.
In one embodiment, the drive system provides drive to the corresponding pixel of described problem data line for stopping
Dynamic signal.
In one embodiment, the drive system is mentioned for stopping to the corresponding touch control unit of described problem data line
For driving signal.
Specifically, as shown in Fig. 2, the embodiment of the present invention increase inside the source electrode driver determine it is whether short between data line
The modular circuit on road, such as two gray scale voltage output points of gamma10 and gamma5, while increasing current detection module circuit,
The current detecting point 1213 on the second gray scale voltage output point 1212 is detected, current detecting point 1213 is connected to by 1.2V pull-up
The interrupt pin 131EN pin of power-supply management system 13PMIC then exports a feedback signal and is given to PMIC not if there is short circuit
Output avoids short circuit from causing molten screen problem.
Sequence controller is to the control signal SFC of source electrode driver, and t1 is high level between the effective display area of a frame,
Blank section t2 is low level, and in blank section when t2, source electrode driver enters test pattern, the detection of current detecting point output
Signal SRF is high level when not detecting short circuit, is low level when detecting short circuit.
As shown in figure 5, source electrode driver enters test pattern at blank section, it is adjacent to two respectively by setting
Data line fill the opposite gray scale voltage of positive-negative polarity, i.e. two voltages of gamma10 and gamma5, when data line short circuit, electric current
Detection reaches electric current on detection module, and detection signal SRF is lower by height, and detection signal SRF is connected to power supply by 1.2V pull-up
The EN pin of management system, when there is data line short circuit, detection signal SRF be lower, power-supply management system PMIC close, not followed by
Continuous outputting drive voltage prevents molten screen from causing safety accident.
According to above-described embodiment:
In display device provided by the present invention, drive system in addition to conventional driving panel realize corresponding function it
Outside, it also detects and whether occurs line short between the data line, and execute anti-molten screen strategy when detecting line short, prevent
The only molten screen of the display panel solves data line short circuit of the existing technology and causes display device molten the technical issues of shielding.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of display device characterized by comprising
Panel；
Drive system connects the functional unit in the panel by data line, for driving the panel to work；
Power-supply management system is used for output supply voltage；
Wherein, the drive system is also used to detect whether occur line short between the data line, and is detecting route
Anti- molten screen strategy is executed when short-circuit, prevents the molten screen of the display device.
2. display device according to claim 1, which is characterized in that the drive system includes source electrode driver, described
Source electrode driver includes:
First gray scale voltage output point, for inputting the first gray scale voltage to the first data line；
Second gray scale voltage output point, for inputting the second gray scale voltage to the second data line；First gray scale voltage and institute
It is opposite to state the second gray scale voltage positive-negative polarity；
Current detecting point, for detecting in the first gray scale voltage output point and the second gray scale voltage output point at least
One whether there is electric current, and when detecting electric current, be determined as detecting line short.
3. display device according to claim 2, which is characterized in that the power-supply management system includes an interrupt pin；
The current detecting point sends interrupt signal when detecting electric current, to the interrupt pin；The power-supply management system is being examined
It measures the interrupt signal and stops output supply voltage.
4. display device according to claim 3, which is characterized in that the interrupt pin includes switch pin.
5. display device according to claim 4, which is characterized in that the current detecting point passes through with the switch pin
One protective resistance connects upper pull-up voltage；When detecting electric current, the detection signal of output is overturn the current detecting point, forms institute
State interrupt signal；When detecting signal overturning, the voltage signal overturning of the switch pin, the power-supply management system is being detected
Stop output supply voltage after to voltage signal overturning.
6. display device according to claim 2, which is characterized in that the drive system includes sequence controller, described
Sequence controller is used to export control signal to the source electrode driver, and the control signal includes the effective display being alternately present
Region and blank section；Whether the source electrode driver is there is line short between detection data line in the blank section.
7. display device according to claim 1, which is characterized in that the panel includes display panel and touch panel,
The drive system is used to detect between the data line of the display panel line short whether occur, and/or for detecting
It states between the data line of touch panel and whether line short occurs.
8. display device according to claim 1, which is characterized in that the panel only includes touch-control display panel, described
Drive system is used to detect between the display layer data line of the touch-control display panel, between touch control layer data line and shows
Whether there is line short between layer data line and touch control layer data line.
9. display device according to any one of claims 1 to 8, which is characterized in that the drive system is for detecting phase
Whether there is line short between adjacent data line.
10. display device according to claim 9, which is characterized in that the drive system is set to described for detection
Whether there is line short between adjacent data line in the fringe region of panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811193801.9A CN109300440B (en) | 2018-10-15 | 2018-10-15 | Display device |
| PCT/CN2019/070496 WO2020077891A1 (en) | 2018-10-15 | 2019-01-04 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811193801.9A CN109300440B (en) | 2018-10-15 | 2018-10-15 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109300440A true CN109300440A (en) | 2019-02-01 |
| CN109300440B CN109300440B (en) | 2020-05-22 |
Family
ID=65162707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811193801.9A Active CN109300440B (en) | 2018-10-15 | 2018-10-15 | Display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109300440B (en) |
| WO (1) | WO2020077891A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103183A1 (en) * | 2019-11-29 | 2021-06-03 | Tcl华星光电技术有限公司 | Drive circuit, drive method, and display apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020077891A1 (en) | 2020-04-23 |
| CN109300440B (en) | 2020-05-22 |
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