CN100526943C - Display device - Google Patents
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- CN100526943C CN100526943C CNB2006100636756A CN200610063675A CN100526943C CN 100526943 C CN100526943 C CN 100526943C CN B2006100636756 A CNB2006100636756 A CN B2006100636756A CN 200610063675 A CN200610063675 A CN 200610063675A CN 100526943 C CN100526943 C CN 100526943C
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- signal
- display device
- backlight
- enable signal
- back light
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Abstract
The invention provides a display device including a backlight module, a driving circuit of the backlight module, and a driving circuit of a light source; the backlight module has at least one backlight unit; the driving circuit of the backlight module contains a memorizer, an arithmetic unit and an output unit, wherein the arithmetic unit receives a display signal and make the black frame insertion operation to the display signal according to a default table of a panel to output an inserted black signal; the output unit receives and selectively outputs an enabling signal or an unable signal according to the inserted black signal; the driving circuit of the light source outputs a brightens control signal to into the backlight unit according to the enabling signal and the unable signal. The invention directly control an LED to be enable or to be unable according to the brightness of the display signal of the display device, which can not only save cost of the display device, but can adjust the working period of the display device as well.
Description
Technical field
The present invention is about a kind of display, especially in regard to a kind of display device of utilizing drive circuit for backlight module group to switch the light emitting diode in the back light unit fast.
Background technology
Early stage Thin Film Transistor-LCD (Thin Film Transistor Liquid CrystalDisplay, abbreviation TFT-LCD) main range of application is at mobile computer (notebook, be called for short NB) or the screen of personal computer, so its signal of video signal mostly is tableaux greatly.But in recent years, because the research and development of each tame LCD manufacturer, lcd technology is being applied on large-sized TFT-LCD gradually also, and signal of video signal also from before static state to become be the signal of video signal of dynamic menu.Yet present TFT-LCD is the demonstration of adopting maintenance pattern (hold-type), and just before the next record data did not write pixel, described pixel promptly kept showing these data at present.Therefore, such maintenance pattern (its voltage and time relation are then as shown in Figure 2) can cause the smear phenomenon of dynamic menu on dynamic menu the time.
Please refer to Fig. 3, it illustrates the circuit block diagram of existing a kind of LCD.Existing LCD 300 comprises source electrode drive circuit 302, first grid integrated circuit 304, second grid integrated circuit 306, the 3rd grid integrated circuits 308 and viewing area 310.Wherein, viewing area 310 is made up of most the block of pixels that gate driving line G1～G768 and source drive line CH1～CH3072 are constituted.
In existing technology, first grid integrated circuit 304, second grid integrated circuit 306, the 3rd grid integrated circuits 308 all receive an output enable signal, and this output enable signal comprises the first output enable signal, the second output enable signal, the 3rd output enable signal.This first output enable signal is control the 3rd grid integrated circuits 308 for control first grid integrated circuit 304, the second output enable signal for control second grid integrated circuit 306, the 3rd output enable signal.
Please merge with reference to Fig. 3 and Fig. 4, in existing technology, after gate driving line G1 is switched on, when the first output enable signal is high logic value, the output scanning signal is not to gate driving line G1, up at the first output enable signal during for low logical value, gate driving line G1 output scanning signal.After gate driving line G2 is switched on, be when hanging down logical value, just to be able to the output scanning signal then to gate driving line G2 at the second output enable signal.After gate driving line G3 is switched on, be when hanging down logical value, just to be able to the output scanning signal then to gate driving line G3 at the 3rd output enable signal.
Comprehensively the above can make picture produce the smear phenomenon because of liquid crystal display speed the ocular vision too slow or user persists in present LCD.
Summary of the invention
Purpose of the present invention is providing a kind of drive circuit for backlight module group exactly, and it can be according to the signal that grid or source electrode transmitted of display, and the output brightness control signal is used the brightness that strengthens or reduce luminescence unit.
Purpose of the present invention is providing a kind of display device exactly, but it utilizes the characteristic of the high-speed switch of light emitting diode itself, and directly controls the brightness of the light emitting diode in the module backlight.
The present invention proposes a kind of display device, and it receives a shows signal and/or an output enable signal, and display device comprises module backlight, drive circuit for backlight module group and light emitting source driving circuit.This module backlight has at least one back light unit.This drive circuit for backlight module group comprises storer, arithmetic element and output unit.Above-mentioned memory storage has the default table of a panel.Above-mentioned arithmetic element receives shows signal, and according to the default table of panel shows signal is done a black plug computing, and exports a black frame insertion signals.Above-mentioned output unit receives and optionally exports an enable signal or a disable signal according to black frame insertion signals.The light emitting source driving circuit is then exported brightness control signal to back light unit according to enable signal and disable signal.
Wherein, described back light unit is according to described brightness control signal decision luminosity.
Described drive circuit for backlight module group determines each described back light unit luminosity separately according to described output enable signal and shows signal.
Described black plug computing is according to described output enable signal, calculates the sequential that needs picture black frame insertion in the described shows signal.
When described output unit is exported an enable signal, then make described back light unit increase luminosity according to described brightness control signal.
When described output unit is exported a disable signal, then make described back light unit reduce luminosity according to described brightness control signal.
Described module backlight is a straight-down negative LED backlight module.
Described module backlight is a side-lighting type light-emitting diode module backlight.
In sum, in drive circuit for backlight module group of the present invention and the display device of using it, but can utilize the characteristic of the high-speed switch of light emitting diode itself, and secretly directly control enabling and forbidden energy of light emitting diode in the module backlight according to the shows signal of display device bright, not only can save the cost of display device, also can adjust the work period of display device.
Description of drawings
Fig. 1 is the circuit block diagram according to a kind of display device of a preferred embodiment of the present invention;
Fig. 2 is the waveform synoptic diagram of the maintenance pattern of existing a kind of LCD;
Fig. 3 is the circuit block diagram of existing a kind of LCD;
Fig. 4 is the signal waveform synoptic diagram of existing a kind of LCD.
The main element symbol description:
100: display device 102: drive circuit for backlight module group
104: module 106 backlight: gate driver circuit
108,302: source electrode drive circuit 110: output unit
112: arithmetic element 114: storer
116: light emitting source driving circuit 300: LCD
304: first grid integrated circuit 306: the second grid integrated circuit
Grid integrated circuits 310 in 308: the three: the viewing area
CH1, CH2, CH3, CH3072; CHN: source drive line
G1, G256, G257, G512, G513, G768, GM: gate driving line
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
Please refer to Fig. 1, it illustrates the circuit block diagram according to a kind of display device of a preferred embodiment of the present invention.This display device 100 comprises drive circuit for backlight module group 102, module backlight 104, source electrode drive circuit 108, gate driver circuit 106 and light emitting source driving circuit 116.Wherein, the viewing area of display device 100 is made up of most the block of pixels that gate driving line G1～GM and source drive line CH1～CHN are constituted.
In preferred embodiment of the present invention, it for example is that the output enable signal that transmits of time schedule controller (T-CON) is with driving grid drive wire G1～GM that gate driver circuit 106 receives.
In preferred embodiment of the present invention, it for example is that the shows signal that transmits of the CPU (central processing unit) (not illustrating) of display device 100 is to drive source electrode drive wire CH1～CHN that source electrode drive circuit 108 receives.
In the present embodiment, module 104 backlight has at least one back light unit (not illustrating), and back light unit is for being made up of most light emitting diodes (Light Emitting Diode is called for short LED).
Drive circuit for backlight module group 102 is electrically coupled to module 104 backlight, and drive circuit for backlight module group 102 comprises arithmetic element 112, output unit 110 and storer 114.
Wherein, arithmetic element 112 is electrically coupled to storer 114, and receives shows signal/output enable signal, and according to the default table of panel shows signal/output enable signal is done a black plug computing, and exports a black frame insertion signals.
In preferred embodiment of the present invention, this black plug computing is according to shows signal, calculates the sequential that needs picture black frame insertion in the shows signal.
Light emitting source driving circuit 116 is electrically coupled to the back light unit and the output unit 110 of module 104 backlight, and exports a brightness control signal to back light unit according to enable signal and disable signal.Just, when output unit 110 output enable signals, then make these back light units increase luminosity according to brightness control signal; Otherwise, when output unit 110 output disable signal, then make these back light units reduce luminosity according to brightness control signal.
In preferred embodiment of the present invention, arithmetic element 112 can be only to receive shows signal or output enable signal separately, or receives shows signal and output enable signal simultaneously.
In preferred embodiment of the present invention, drive circuit for backlight module group 102 is according to each bar back light unit of output enable signal deciding luminosity separately.Just, for example when the output enable signal enables gate driving line G1, can shows signal be write the adjustment that drive circuit for backlight module group 102 then strengthened or reduced the luminosity with the corresponding described back light unit of gate driving line G1 this moment by source drive line CH1～CHN.
Please continue with reference to Fig. 1, the manner of execution of this display device 100 is for after display device 100 is activated, and drive circuit for backlight module group 102 at first sends enable signal to light emitting source driving circuit 116, increases brightness to make light emitting diode by brightness control signal.Secondly, 102 of drive circuit for backlight module group receive shows signal and/or output enable signal, and shows signal and/or output enable signal are done a black plug computing according to the default table of panel, obtaining black frame insertion signals, and export this black frame insertion signals to output unit 110.
Then, 110 of output units according to this black frame insertion signals (sequential that just needs picture black frame insertion in the shows signal) output enable signal or disable signal to light emitting source driving circuit 116.
Wherein, when module 104 back light units backlight now are when needing picture black frame insertion in luminance (lumination of light emitting diode brightness is higher) and the next clock, then 110 of output units are exported disable signal to light emitting source driving circuit 116 when next clock, to reduce the brightness of back light unit.
And when module 104 back light units backlight need the picture recovery color in now for dark state (just picture is that black plug state or lumination of light emitting diode brightness are lower at present) and next clock, then 110 of output units are when next clock, output enable signal to light emitting source driving circuit 116, so that back light unit increases its brightness.
In preferred embodiment of the present invention, as be familiar with this skill person and can know easily, module 104 backlight can be straight-down negative LED backlight module or side-lighting type light-emitting diode module backlight, but all not as limit.And if during side-lighting type light-emitting diode module backlight, display device 100 can for example be to dispose one group of side-lighting type light-emitting diode backlight source or two groups of side-lighting type light-emitting diode backlight sources.
In preferred embodiment of the present invention, as be familiar with this skill person and can know easily, the deviser of display device 100 is when design, for the consideration of cost with convenient control, also light emitting source driving circuit 116 can be disposed within the drive circuit for backlight module group 102, but all not as limit.
In sum, in drive circuit for backlight module group of the present invention and the display device of using it, but can utilize the characteristic of the high-speed switch of light emitting diode itself, and secretly directly control enabling and forbidden energy of light emitting diode in the module backlight according to the shows signal of display device bright, not only can save the cost of display device, also can adjust the work period of display device.
The above utilizes a preferred embodiment and different embodiment describing the present invention in detail, and it is not in order to limiting practical range of the present invention, and has the knack of described skill person and all can understand, suitably make slightly modification still without departing from the spirit or scope of the invention.
Claims (7)
1. a display device is characterized in that, described display device receives an output enable signal and a shows signal, and described display device comprises: a module backlight, a drive circuit for backlight module group and a light emitting source driving circuit;
Described module backlight has at least one back light unit;
Described drive circuit for backlight module group comprises:
One storer stores the default table of a panel;
One arithmetic element, be electrically coupled to described storer, and receive described output enable signal and shows signal, and preset table according to the panel in the described storer described output enable signal and shows signal are done a black plug computing, and export a black frame insertion signals, described black plug computing is according to described output enable signal, calculates the sequential that needs picture black frame insertion in the described shows signal; And
One output unit is electrically coupled to described arithmetic element, and receive and optionally export according to described black frame insertion signals an enable signal and a disable signal one of them;
Described light emitting source driving circuit is electrically coupled to described back light unit and output unit, in order to export a brightness control signal to described back light unit according to described enable signal and disable signal.
2. display device according to claim 1 is characterized in that, described back light unit is according to described brightness control signal decision luminosity.
3. display device according to claim 1 is characterized in that, described drive circuit for backlight module group determines each described back light unit luminosity separately according to described output enable signal and shows signal.
4. display device according to claim 1 is characterized in that, when described output unit is exported an enable signal, then makes described back light unit increase luminosity according to described brightness control signal.
5. display device according to claim 1 is characterized in that, when described output unit is exported a disable signal, then makes described back light unit reduce luminosity according to described brightness control signal.
6. display device according to claim 1 is characterized in that, described module backlight is a straight-down negative LED backlight module.
7. display device according to claim 1 is characterized in that, described module backlight is a side-lighting type light-emitting diode module backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100636756A CN100526943C (en) | 2006-12-31 | 2006-12-31 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100636756A CN100526943C (en) | 2006-12-31 | 2006-12-31 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101211028A CN101211028A (en) | 2008-07-02 |
| CN100526943C true CN100526943C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100636756A Expired - Fee Related CN100526943C (en) | 2006-12-31 | 2006-12-31 | Display device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4784780B2 (en) * | 2008-06-30 | 2011-10-05 | ソニー株式会社 | Display device, driving method thereof, and electronic apparatus |
| CN101727802B (en) * | 2008-10-31 | 2012-07-04 | 瀚宇彩晶股份有限公司 | Displayer and driving device and method thereof |
| CN105590590A (en) * | 2016-03-09 | 2016-05-18 | 深圳市华星光电技术有限公司 | Backlight brightness automatic adjusting system suitable for different liquid crystal panels and liquid crystal display with backlight brightness automatic adjusting system |
| CN107665694B (en) * | 2016-07-29 | 2020-06-30 | 上海和辉光电有限公司 | Brightness adjusting method and system of display device |
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2006
- 2006-12-31 CN CNB2006100636756A patent/CN100526943C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101211028A (en) | 2008-07-02 |
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