CN101546096B - Starting method and shutdown method for video display unit - Google Patents
Starting method and shutdown method for video display unit Download PDFInfo
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- CN101546096B CN101546096B CN2008100872368A CN200810087236A CN101546096B CN 101546096 B CN101546096 B CN 101546096B CN 2008100872368 A CN2008100872368 A CN 2008100872368A CN 200810087236 A CN200810087236 A CN 200810087236A CN 101546096 B CN101546096 B CN 101546096B
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Abstract
The invention discloses a starting method and a shutdown method for a video display unit. When a display panel and a light source are started, a low voltage power supply used for electronic circuits is provided to the display panel; the display panel is set by utilizing a read write demand (R/W); a high voltage power supply is provided to the display panel for liquid crystal transition; the display panel is discharged to remove residual charge; and the light source is opened to illuminate the display panel. Conversely, when the video display unit is shut down, the light source is closed, and the display panel is discharged; the high voltage power supply is stopped in application; the display panel is set by utilizing the read write demand (R/W); and the low voltage power supply is stopped in application.
Description
Technical field
The present invention relates to a kind of power-up sequence and/or shutdown order of video display.
Background technology
Recently, as is well known, with image projecting to the pre-projecting type projector (front projector) of the front end (that side of spectators) of screen as family expenses or home theater system.
Can order about consumption demand towards more small-sized portable apparatus with the trend of walking, similarly be mobile phone, portable digital assistant, music and movie player, mobile computer, head mounted display or the like.Along with dwindling with function of size increases, show that the naked eyes visible image can run into a very basic problem with very little device.Because the fixed measure of screen can't be become the size that increases device itself greatly and not, provide the naked eyes visible image by dingus easily, unique feasible method is to utilize data projector to throw them.
The topic that another most of spectators are interested in is three-dimensional space (3-dimensional, 3D) projection.Present data projector does not support to show full color 3D image, and it is rarely found also very expensive to be used to carry out the special device of these functions.Have only under the device of supporting 3D is widely used, the multimedia industry just can increase in the supply of 3D film, recreation and other amusement.
Yet the life cycle that increases video display or Imaing projector is more important.Then, be only preferable display result, further being only needs low power consumption.
Summary of the invention
The invention provides power supply opening order and/or shutdown order in image display, it discharges via counter plate, can make life cycle prolong and/or promote the demonstration usefulness of image display or image projecting.
The present invention also provides power supply opening order and/or shutdown order in image display, and it is the counter plate discharge when closing light source, and preferable display result can be provided.
The present invention also provides power supply opening order and/or shutdown order in image display, and it carries out the panel instruction under LVPS, can reach low-power consumption.
One embodiment of the present of invention provide a kind of starting-up method that is applicable to display panel and light source, comprising: (a1) provide first reference voltage to display panel; (a2) execution command is to set display panel; (a3) provide second reference voltage to display panel; (a4) allow display panel discharge; And (a5) open light source to illuminate display panel.
Another embodiment of the present invention provides a kind of closedown method that is applicable to display panel and light source, comprising: (b1) turn off light source; (b2) allow display panel discharge; (b3) stop supplies first reference voltage is to display panel; (b4) execution command is to set display panel; And (b5) stop supplies second reference voltage to display panel.
Another embodiment again of the present invention provides a kind of method that is used to improve the usefulness of display panel and light source, comprising: (a) when display panel is started shooting: (a1) provide first reference voltage to display panel; (a2) execution command is to set display panel; (a3) provide second reference voltage to display panel; (a4) allow display panel discharge; And (a5) open light source to illuminate display panel; (b) when display panel shuts down: (b1) turn off light source; (b2) allow display panel discharge; (b3) stop supplies first reference voltage is to display panel; (b4) execution command is to set display panel; And (b5) stop supplies second reference voltage to display panel.
Description of drawings
Fig. 1 illustrates the synoptic diagram of the display device in one embodiment of the invention.
Fig. 2 is depicted as according to the sequential chart for the power-up sequence of display panel and light source that is applied in the first embodiment of the invention in the display device.
Fig. 3 is shown as according to the shutdown sequential chart in proper order for display panel and light source that is applied in the second embodiment of the invention in the display device.
The primary clustering symbol description:
The 100-display device; The 110-display panel; The 120-light source; The VDD-LVPS; The VDDA-high-voltage power supply; The R/W-read write command
Embodiment
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Following narration will be accompanied by the diagram of embodiment, in detail embodiment proposed by the invention be described.Employed same or analogous reference number in each diagram is to be used for narrating same or analogous part.
First embodiment
Fig. 1 shows the synoptic diagram of the display device of one embodiment of the invention.As shown in Figure 1, display device 100 comprises display panel 110 and light source 120 at least, and other essential intraware is not shown in Fig. 1 for simplicity in the display device 100.
Please refer to Fig. 2 now, it is shown as according to the sequential chart that is applied in the first embodiment of the invention in the display device for the power-up sequence of display panel and light source.
Please refer to Fig. 2 now.First light is opened LVPS VDD and is put on display panel.Then, LVPS VDD is applied in the electronic circuit of display device inside, for example is lock level driver, source electrode driver or the like.LVPS VDD is usually less than 2V.
Instruction is set and is used for setting display panel.Instruction for example comprises that LCoS reading command, LCoS write instruction or LCoS read write command, but not subject to the limits.Then, set can be at different display device and sequencing in instruction.In the present embodiment, because under LVPS, operate, so can save the consumption of power.
Afterwards, after applying high-voltage power supply VDDA, carry out the discharge of panel.The panel discharge is for discharging the residual charge that is accumulated in the display panel, in order to prolong the life-span of display panel.The residual charge of these accumulations may come from the unexpected or undesired shutdown of display device.
Then, open light source to illuminate display panel.In the present embodiment, first counter plate discharge before opening light source, thus, the bad image that the discharge of the panel of display panel is caused can not seen by the user.
Second embodiment
Fig. 3 is shown as according to the sequential chart that is applied in the second embodiment of the invention in the display device for the shutdown order of display panel and light source.
At first, light source is closed, the user just can not see the bad image that the subsequent panel discharge in the display panel is caused.
Then, the display panel discharge to remove display panel when playing, is accumulated in the electric charge of display panel.Then, stop supplies high-voltage power supply VDDA is to display panel.
Instruction is set and is used for setting display panel.Instruction for example comprises that LCoS reading command, LCoS write instruction or LCoS read write command, but not subject to the limits.Then, set can be at different display device and sequencing in instruction.In the present embodiment, because under LVPS, operate, so can save the consumption of power.
Afterwards, just stop supplies to the LVPS VDD of display panel.
The 3rd embodiment
In the 3rd embodiment, carry out the power-up sequence and the shutdown order of display device in regular turn.Now please referring again to Fig. 2 and Fig. 3 to understand according to the third embodiment of the present invention.
Please refer to Fig. 2 now.At first, open LVPS VDD to be applied to display panel.Then, LVPS VDD is applied to the internal electronics of display device, for example is gate pole driver, source electrode driver or the like.LVPS VDD is usually less than 2V.
Instruction is set and is used for setting display panel.Instruction for example comprises that LCoS reading command, LCoS write instruction or LCoS read write command, but not subject to the limits.Then, set can be at different display device and sequencing in instruction.In the present embodiment, because under LVPS, operate, so can save the consumption of power.
Then, apply high-voltage power supply VDDA in display panel, high-voltage power supply VDDA is used in the operation of the liquid crystal material of display panel, and for instance, high-voltage power supply VDDA is used for making the liquid crystal molecule transition.
Afterwards, after applying high-voltage power supply VDDA, carry out the discharge of panel.The panel discharge is for discharging the residual charge that is accumulated in the display panel, in order to prolong the life-span of display panel.The residual charge of these accumulations may come from display device unexpectedly or undesired shutdown.
Then, open light source to illuminate display panel.In the present embodiment, first counter plate discharge before opening light source, thus, the bad image that the discharge of the panel of display panel is caused can not seen by the user.
Next, please refer to Fig. 3.Light source is closed, so the user can not see the bad image that the follow-up panel discharge of carrying out of display panel is caused.Then, the display panel discharge to remove display panel when playing, is accumulated in the electric charge of display panel.Then, stop supplies high-voltage power supply VDDA is to display panel.Instruction is set and is used for setting display panel.Instruction for example comprises that LCoS reading command, LCoS write instruction or LCoS read write command, but not subject to the limits.Then, set can be at different display device and sequencing in instruction.In the present embodiment, because under LVPS, operate, so can save the consumption of power.Afterwards, the LVPS VDD that is supplied to display panel has just stopped.
In an embodiment of the present invention, via panel discharge remove display device operating period or because display device unexpectedly or the residual charge accumulated of undesired shutdown, the life cycle of display device is prolonged.Moreover, because in start, before light source is opened, or in shutdown, after light source is closed, just do the panel discharge, can obtain preferable demonstration usefulness.Further, because execution command is set under LVPS, the loss that can save power.
Though the present invention describes as above with embodiment; but it is not in order to qualification the present invention, any technician in the art, without departing from the spirit and scope of the present invention; when doing suitable modification and retouching, protection scope of the present invention is as the criterion with accompanying claims.
Claims (13)
1. starting-up method that is applicable to display panel and light source comprises:
(a1) provide the first reference voltage low-voltage to this display panel;
(a2) execution command is to set this display panel;
(a3) provide the second reference voltage high voltage to display panel;
(a4) allow this display panel discharge; And
(a5) open this light source to illuminate this display panel.
2. starting-up method as claimed in claim 1, wherein this execution command also comprises to set this display panel step: carry out the setting of reading command.
3. starting-up method as claimed in claim 1, wherein this execution command also comprises to set this display panel step: carry out the setting that writes instruction.
4. starting-up method as claimed in claim 1, wherein this display panel is the LCoS panel.
5. closedown method that is applicable to display panel and light source comprises:
(b1) turn off this light source;
(b2) allow this display panel discharge;
(b3) the stop supplies high voltage is to this display panel;
(b4) execution command is to set this display panel; And
(b5) the stop supplies low-voltage is to this display panel.
6. closedown method as claimed in claim 5, wherein this execution command also comprises to set this display panel step: carry out the setting of reading command.
7. closedown method as claimed in claim 5, wherein this execution command also comprises to set this display panel step: carry out the setting that writes instruction.
8. closedown method as claimed in claim 5, wherein this display panel is the LCoS panel.
9. method that is used to improve the usefulness of display panel and light source comprises:
(a) when display panel is started shooting:
(a1) provide low-voltage to this display panel;
(a2) execution command is to set this display panel;
(a3) provide high voltage to display panel;
(a4) allow this display panel discharge; And
(a5) open light source to illuminate this display panel; And
(b) when display panel shuts down:
(b1) turn off this light source;
(b2) allow this display panel discharge;
(b3) the stop supplies high voltage is to this display panel;
(b4) execution command is to set this display panel; And
(b5) the stop supplies low-voltage is to this display panel.
10. method as claimed in claim 9, wherein this step (a2) also comprises: carry out the setting of reading command.
11. method as claimed in claim 9, wherein this step (a2) also comprises: carry out the setting that writes instruction.
12. method as claimed in claim 9, wherein this step (b4) also comprises: carry out the setting of reading command.
13. method as claimed in claim 9, wherein this step (b4) also comprises: carry out the setting that writes instruction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100872368A CN101546096B (en) | 2008-03-24 | 2008-03-24 | Starting method and shutdown method for video display unit |
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| CN2008100872368A CN101546096B (en) | 2008-03-24 | 2008-03-24 | Starting method and shutdown method for video display unit |
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| CN101546096B true CN101546096B (en) | 2010-08-18 |
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| KR101925993B1 (en) | 2011-12-13 | 2018-12-07 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device having Discharge Circuit and Method of driving thereof |
| CN104616614B (en) * | 2014-11-28 | 2017-11-17 | 合肥京东方光电科技有限公司 | The powering method and device of display module, detection method and device |
| GB201708081D0 (en) * | 2017-05-19 | 2017-07-05 | Alesi Surgical Ltd | Surgical assembly and system |
| TWI799244B (en) * | 2022-04-26 | 2023-04-11 | 友達光電股份有限公司 | Pixel circuit and power supply method for power-off sequence thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465210A (en) * | 2001-06-08 | 2003-12-31 | 索尼株式会社 | Discharge lamp igniter device and projector device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1465210A (en) * | 2001-06-08 | 2003-12-31 | 索尼株式会社 | Discharge lamp igniter device and projector device |
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