CN110910809A - Drive circuit and display device - Google Patents
Drive circuit and display device Download PDFInfo
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- CN110910809A CN110910809A CN201911168377.7A CN201911168377A CN110910809A CN 110910809 A CN110910809 A CN 110910809A CN 201911168377 A CN201911168377 A CN 201911168377A CN 110910809 A CN110910809 A CN 110910809A
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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
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a driving circuit and a display device, the driving circuit includes: the power supply management module comprises a voltage control unit, wherein the voltage control unit is provided with a power supply input end and a first output end, the power supply input end is connected with a first voltage, and the power supply input end is also connected with a second output end; the second output end is connected with the first end of the first resistor, the second end of the first resistor is respectively connected with the first output end and the first end of the second resistor, and the second end of the second resistor is grounded; the control module includes: the grid electrode of the thin film transistor is connected with a control signal, and the drain electrode of the thin film transistor is grounded; and one end of the third resistor is connected with the source electrode of the thin film transistor, and the other end of the third resistor is connected with the second end of the first resistor. The driving circuit and the display device can avoid chromatic aberration and improve the display effect.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a driving circuit and a display device.
[ background of the invention ]
With the continuous development of the display screen, the display screen has a plurality of modes, such as a game mode and a normal mode, the game mode is a state that a user uses the display screen to play a game, generally, the frequency of the display screen in the game mode is different from the frequency of the display screen in the normal mode, and the frequency of the display screen in the game mode is higher.
With the increase of the frequency, the charging time is reduced, so that the brightness of the screen is lower under the same gray scale, namely the brightness under the game mode is lower than that under the common mode, further, color difference occurs, and the display effect is reduced.
Therefore, it is desirable to provide a driving circuit and a display device to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide a driving circuit and a display device, which can avoid chromatic aberration and improve the display effect.
To solve the above technical problem, the present invention provides a driving circuit, including:
the power supply management module comprises a voltage control unit, wherein the voltage control unit is provided with a power supply input end and a first output end, the power supply input end is connected with a first voltage, and the power supply input end is also connected with a second output end; the second output end is connected with the first end of the first resistor, the second end of the first resistor is respectively connected with the first output end and the first end of the second resistor, and the second end of the second resistor is grounded;
the control module is used for increasing the voltage of the second output end when the display screen is in a second mode, and comprises:
the grid electrode of the thin film transistor is connected with a control signal, and the drain electrode of the thin film transistor is grounded;
and one end of the third resistor is connected with the source electrode of the thin film transistor, and the other end of the third resistor is connected with the second end of the first resistor.
The invention provides a display device comprising the driving circuit.
According to the driving circuit and the display device, the control module is added, so that when the display screen is in the second mode, the voltage of the second output end is increased, the problem of insufficient charging caused by short charging time can be solved, the situation that the brightness in the game mode is lower than that in the common mode is avoided, the color cast is avoided, and the display effect is improved.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a driving circuit according to a first embodiment of the invention.
Fig. 2 is a schematic structural diagram of a driving circuit according to a second embodiment of the invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a driving circuit according to a first embodiment of the invention.
As shown in fig. 1, the driving circuit of the present embodiment is used for providing a power supply voltage to a display screen, and the driving circuit includes a power management module 10, a first resistor R1, a second resistor R2, and a control module 20.
The power management module 10 comprises a voltage control unit 11, said voltage control unit 11 having a power input 111 and a first output 112. The power input end 111 is connected to a first voltage V0, the power input end 111 is further connected to a second output end 30, that is, the power input end 111 is connected to a first node a, one end of the first node a is connected to a first voltage V0, and the other end of the first node a is connected to the second output end 30; the second output terminal 30 is connected to a first terminal of the first resistor R1, a second terminal of the first resistor R1 is connected to first terminals of the first output terminal 112 and the second resistor R2, and a second terminal of the second resistor R2 is grounded. That is, the second output terminal 30 is grounded via a series circuit of a first resistor R1 and a second resistor R2, that is, the first output terminal 112 is connected to a node B between the first resistor R1 and the second resistor R2. Wherein the second output terminal 30 is connected to the power input terminal of the source driver chip.
The control module 20 is configured to increase the voltage of the second output terminal 30 when the display screen is in the second mode. Wherein the second output terminal 30 is for outputting a supply voltage VAA.
The control module 20 includes: a thin film transistor Q1 and a third resistor R3.
The grid electrode of the thin film transistor Q1 is connected with a control signal S, and the drain electrode of the thin film transistor Q1 is grounded; the source of the thin film transistor Q1 is connected to the second end of the first resistor R1 through the third resistor R3, that is, the source of the thin film transistor Q1 is connected to the node B between the first resistor R1 and the second resistor R2 through the third resistor R3.
To better reduce color shift, the thin film transistor Q1 is turned off when the display screen is in the first mode (normal mode); when the display screen is in the second mode (game mode), the thin film transistor Q1 is turned on.
In one embodiment, when the display screen is in the first mode, the control signal S is at a low level; when the display screen is in the second mode, the control signal S is at a high level. The thin film transistor Q1 is of NPN type.
When the display screen is in the second mode, the second output terminal 30 outputs a second power voltage V2; when the display screen is in the first mode, the second output terminal 30 outputs a first power voltage V1, and the second power voltage V2 is greater than the first power voltage V1.
Due to the fact that the control module is added, when the display screen is in the second mode, the voltage of the second output end is increased, the problem that charging is insufficient due to short charging time can be solved, the fact that the luminance in the game mode is smaller than that in the common mode is avoided, color cast is prevented, and the display effect is improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a driving circuit according to a second embodiment of the invention.
As shown in fig. 2, on the basis of the previous embodiment, the control module 20 of this embodiment further includes: at least one of the timing controller 21, the light emitting diode D1, and the inductor L1.
The timing controller 21 has a signal output terminal 211, and the signal output terminal 211 is used for providing a control signal S; the gate of the thin film transistor Q1 is connected to the signal output terminal 211.
In one embodiment, to facilitate detecting the voltage level of the second output terminal 30, the power input terminal 111 is connected to the second output terminal 30 through a light emitting diode D1, and the other end of the first node a is connected to the second output terminal 30 through a light emitting diode D1.
In order to reduce the interference signal, the power input 111 is connected to the first voltage V0 through an inductor L1, and one end of the first node a is connected to the first voltage V0 through an inductor L1. Wherein the second power voltage V2 may be:
V2＝Vf*(1+R1/[R2*R3/(R2+R3)])
wherein V2 is the second supply voltage, VfFor the voltage of the first output terminal, R1 is a first resistor, R3 is a third resistor, and R2 is a second resistor.
The first supply voltage V1 may be:
V1＝Vf*(1+R1/R2)
wherein V1 is the first power supply voltage, VfR1 is a first resistor and R2 is a second resistor, which are voltages at the first output terminal. VfTypically a fixed value, such as 0.6 v. In one embodiment, V0 may be 12V.
When the display screen is in the first mode, the control signal S output by the timing controller 21 is at a low level;
when the display screen is in the second mode, the control signal S output by the timing controller 21 is at a high level.
When the display screen is in the first mode, the timing controller 21 controls the thin film transistor Q1 to be turned off;
when the display screen is in the second mode, the timing controller 21 controls the thin film transistor Q1 to be turned on.
That is, in the specific working process, in the normal mode, the timing controller 21 outputs the control signal S of low level, Q1 is not turned on, VAA is equal to V1;
when the game mode is entered, the frequency is high, the time schedule controller 21 outputs a high-level control signal S, Q1 is conducted, VAA is equal to V2, so that the problem of insufficient charging caused by short charging time is solved, the brightness reduction of the game mode is avoided, the color cast is avoided, and the display effect is improved.
The invention also provides a display device which comprises any one of the drive circuits and can further comprise a display screen.
According to the driving circuit and the display device, the control module is added, so that when the display screen is in the second mode, the voltage of the second output end is increased, the problem of insufficient charging caused by short charging time can be solved, the situation that the brightness in the game mode is lower than that in the common mode is avoided, the color cast is avoided, and the display effect is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A driver circuit, comprising:
the power supply management module comprises a voltage control unit, wherein the voltage control unit is provided with a power supply input end and a first output end, the power supply input end is connected with a first voltage, and the power supply input end is also connected with a second output end; the second output end is connected with the first end of the first resistor, the second end of the first resistor is respectively connected with the first output end and the first end of the second resistor, and the second end of the second resistor is grounded;
the control module is used for increasing the voltage of the second output end when the display screen is in a second mode, and comprises:
the grid electrode of the thin film transistor is connected with a control signal, and the drain electrode of the thin film transistor is grounded;
and one end of the third resistor is connected with the source electrode of the thin film transistor, and the other end of the third resistor is connected with the second end of the first resistor.
2. The drive circuit of claim 1, wherein the control module further comprises:
and the time schedule controller is provided with a signal output end, the signal output end is used for providing the control signal, and the signal output end is connected with the grid electrode of the thin film transistor.
3. The drive circuit according to claim 2,
when the display screen is in a first mode, the time sequence controller controls the thin film transistor to be turned off;
when the display screen is in the second mode, the time sequence controller controls the thin film transistor to be started.
4. The drive circuit according to claim 2,
when the display screen is in a first mode, the control signal output by the time sequence controller is at a low level;
when the display screen is in the second mode, the control signal output by the time sequence controller is at a high level.
5. The drive circuit according to any one of claims 1 to 4,
when the display screen is in a second mode, the second output end outputs a second power supply voltage;
when the display screen is in a first mode, the second output end outputs a first power supply voltage, wherein the second power supply voltage is larger than the first power supply voltage.
6. The driving circuit according to claim 5, wherein the second power supply voltage is:
V2＝Vf*(1+R1/[R2*R3/(R2+R3)])
wherein V2 is the second supply voltage, R1R2 is the second resistor, R3 is the third resistor, V is the first resistorfIs the voltage of the first output terminal.
7. The driving circuit according to claim 5, wherein the first power supply voltage is:
V1＝Vf*(1+R1/R2)
wherein V1 is the first power supply voltage, R1 is the first resistor, R2 is the second resistor, VfIs the voltage of the first output terminal.
8. The driving circuit according to claim 1, further comprising a light emitting diode, wherein the power input terminal is connected to the second output terminal through the light emitting diode.
9. The driver circuit according to claim 1, wherein the electrical driver circuit further comprises an inductance through which the power input is connected to the first voltage.
10. A display device comprising the drive circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911168377.7A CN110910809A (en) | 2019-11-25 | 2019-11-25 | Drive circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911168377.7A CN110910809A (en) | 2019-11-25 | 2019-11-25 | Drive circuit and display device |
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| Publication Number | Publication Date |
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| CN110910809A true CN110910809A (en) | 2020-03-24 |
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| CN201911168377.7A Pending CN110910809A (en) | 2019-11-25 | 2019-11-25 | Drive circuit and display device |
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Application publication date: 20200324 |