CN101957542B - Projection display device and light source driving method - Google Patents
Projection display device and light source driving method Download PDFInfo
- Publication number
- CN101957542B CN101957542B CN201010166147XA CN201010166147A CN101957542B CN 101957542 B CN101957542 B CN 101957542B CN 201010166147X A CN201010166147X A CN 201010166147XA CN 201010166147 A CN201010166147 A CN 201010166147A CN 101957542 B CN101957542 B CN 101957542B
- Authority
- CN
- China
- Prior art keywords
- light source
- drive current
- light
- block
- current
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Projection Apparatus (AREA)
Abstract
The invention discloses a protection display device and a light source driving method and relates the fields of the display devices and light source driving methods. The technical problem to be solved by the invention is to provide the projection display device which is characterized by comprising a control driving unit, a light source, a color wheel and a timing unit, wherein the control driving unit is used for driving the light source; the color wheel comprises a first color block and a second color block, the first color block is white or cyan, and the second color block is red, blue, yellow or green; the timing unit is used for recording the using time of the light source; when the using time of the light source is before a first time point, the control driving unit uses the first mode to drive the light source; and when the using time of the light source is after the first time point, the control driving unit then uses the second mode to drive the light source.
Description
[technical field]
The present invention relates to a kind of display device and light source driving method thereof, particularly relate to a kind of projection display equipment and light source driving method thereof.
[background technology]
In recent years, among the application of projector progressively popularizes general family from the past occasions such as meeting bulletin.Main shadow casting technique has at present: cathode ray tube (CRT) shadow casting technique, liquid crystal display (LCD) shadow casting technique, digital light are handled four kinds of technology such as (DLP) shadow casting technique, monocrystalline silicon display panels (LCOS) shadow casting technique.Relative other technology, digital light are handled shadow casting technique and are had advantages such as equipment volume is little and in light weight.Digital light is handled the ultimate principle of shadow casting technique and in one Chinese patent application 200510136244.3 " light-source structure of projector ", is described to some extent, and it comprises elements such as light source and colour wheel.At present, the life-span (being generally several thousand hours) of light source (for example bulb) is the bottleneck in projector's life-span.Industry is that the brightness of projector is reduced to the time that 50% of original intensity is experienced to the calculating principle of light source life.Therefore, the life-span that how to promote light source is the direction that industry is made great efforts research and development.
And colour wheel comprises a plurality of look blocks, in order to produce different colors.The look block commonly comprises redness, green, blueness, white, also can optionally comprise colors such as yellow, cyan.In the prior art, in the colour wheel size of each block to the brightness performance of projector with color table is existing directly influences.When light blocks such as white, cyan when proportion is big in colour wheel, the brightness meeting of projector is higher, but color representation is relatively poor; When dark blocks such as redness, blueness when proportion is big in colour wheel, the color representation of projector is better, but the brightness meeting is lower.In the projector of certain model, can take into account the color representation and the brightness performance of projector through the type of drive of regulating light source.Its principle is for when the light correspondence of light source is passed not homochromy block, and the drive current of light source is different, and just light source can have different brightness (electric current is big more, and light source is bright more).It can set a plurality of mode of operations by the user, thereby with different drive current driving light sources.The A of projector to have red, green, blue, Bai Sise block colour wheel is an example; Be illustrated in figure 1 as sequential chart (the time shaft numerical value express time growing direction only among the figure of the A of projector light source drive current in general mode; Be not expression real time length; Down with), drive current is constant current i (an i value look the light source specifications parameter and different) under this pattern.Be illustrated in figure 2 as the sequential chart of the A of projector light source drive current in the bright pattern of height, at the time slot t11 of the red block of correspondence, drive current is 0.8i; At the time slot t12 of the white block of correspondence, drive current is 1.5i; At the time slot t13 of the blue block of correspondence, drive current is 0.7i; At the time slot t14 of the green block of correspondence, drive current is i.General power at the one-period inner light source does not increase like this, but is equivalent to increase light block proportion in colour wheel, and the brightness of projector has increased.Be illustrated in figure 3 as the sequential chart of the A of projector light source drive current in high color expression mode, at the time slot t21 of the red block of correspondence, drive current is 1.2i; At the time slot t22 of the white block of correspondence, drive current is 0.7i; At the time slot t23 of the blue block of correspondence, drive current is 1.1i; At the time slot t24 of the green block of correspondence, drive current is i.General power at the one-period inner light source does not change like this, but is equivalent to increase dark block proportion in colour wheel, and the color representation of projector is better, brightness simultaneously descends to some extent.Need to prove that the driving current value that each time slot is corresponding among Fig. 2, Fig. 3 is merely explanation trend, can optionally adjust.
In some applications, therefore less demanding to projector color performance can provide a kind of projector and light source driving method thereof that has than the long life with reference to above-mentioned principle.
[summary of the invention]
An object of the present invention is to provide a kind of projection display equipment, it is characterized in that comprising control drive unit, light source, colour wheel, timing unit; Said control drive unit drives said light source; Said colour wheel has the first look block, the second look block, and the said first look block is white or cyan, and the said second look block is red, blue, yellow or green; Said timing unit writes down the service time of said light source; When said light source service time was before very first time point, said control drive unit was used the said light source of first mode activated; After said light source reaches the very first time point service time, said control drive unit then use the said light source of second mode activated; Under said first pattern, said control drive unit is exported first drive current when the light of said light source passes the first look block; Said control drive unit is exported second drive current when the light of said light source passes the second look block; Under said second pattern, said control drive unit is exported the 3rd drive current when the light of said light source passes the first look block; Said control drive unit is exported the 4 wheel driven streaming current when the light of said light source passes the second look block; Said the 3rd drive current is less than said first drive current; Said 4 wheel driven streaming current is greater than said second drive current.
As optional technical scheme, the said very first time is o'clock between 700 hours to 1500 hours.
As optional technical scheme, after said light source reaches second time point service time, said control drive unit then use three-mode to drive said light source; Said second time point is after said very first time point; Under said three-mode, said control drive unit is exported the 5th drive current when the light of said light source passes the first look block; Said control drive unit is exported the 6th drive current when the light of said light source passes the second look block; Said the 5th drive current is less than said the 3rd drive current; Said the 6th drive current is greater than said 4 wheel driven streaming current.As further optional technical scheme, said second time point is between 1700 hours to 2500 hours.
As optional technical scheme, described projection display equipment comprises user interface, and the mode of operation of said control drive unit can manually be set through said user interface.
As optional technical scheme, said light source is a bulb.
Another object of the present invention provides a kind of light source driving method, is applicable to a kind of projection display equipment, and said projection display equipment comprises light source, colour wheel, timing unit; Said colour wheel has the first look block, the second look block, and the said first look block is white or cyan, and the said second look block is red, blue, yellow or green; Said timing unit writes down the service time of said light source; Said method comprises: when said light source service time is before very first time point, use the said light source of first mode activated; After said light source reaches the very first time point service time, use the said light source of second mode activated; Under said first pattern,, the light of said light source exports first drive current when passing the first look block to said light source; , the light of said light source exports second drive current when passing the second look block to said light source; Under said second pattern,, the light of said light source exports the 3rd drive current when passing the first look block to said light source; , the light of said light source exports the 4 wheel driven streaming current when passing the second look block to said light source; Said the 3rd drive current is less than said first drive current; Said 4 wheel driven streaming current is greater than said second drive current.
As optional technical scheme, the said very first time is o'clock between 700 hours to 1500 hours.
As optional technical scheme, after said light source reaches second time point service time, use three-mode to drive said light source; Said second time point is after said very first time point; Under said three-mode,, the light of said light source exports the 5th drive current when passing the first look block to said light source; Said control drive unit is exported the 6th drive current when the light of said light source passes the second look block; Said the 5th drive current is less than said the 3rd drive current; Said the 6th drive current is greater than said 4 wheel driven streaming current.
As optional technical scheme, said second time point is between 1700 hours to 2500 hours.
Compared with prior art, the benefit of projector of the present invention is, can improve the serviceable life of light source of projector.
[description of drawings]
Fig. 1 illustrates the sequential chart of the A of projector light source drive current in general mode;
Shown in Figure 2 is the sequential chart of the A of projector light source drive current in the bright pattern of height;
Shown in Figure 3 is the sequential chart of the A of projector light source drive current in high color expression mode;
Fig. 4 illustrates the sequential chart of the light source drive current of projector under second pattern of one embodiment of the present invention;
Fig. 5 illustrates the sequential chart of the light source drive current of projector under three-mode of one embodiment of the present invention.
[embodiment]
The projection display equipment of one embodiment of the present invention comprises control drive unit, light source (for example being bulb, LED etc.), colour wheel, timing unit.Said control drive unit drives said light source; Said colour wheel has the first look block, the second look block, the 3rd color lump and the 4th color lump, and the said first look block is white or cyan, and that the said second look block to the, four look blocks are respectively is red, blue, a kind of in the green.In other embodiments, can also comprise more look block, like cyan block, yellow block etc.Said timing unit writes down the service time of said light source, and timing unit for example has nonvolatile memory, can when display cuts off the power supply, still preserve the service time of light source.Timing unit for example can be integrated in the chip with control drive unit.When said light source service time was before very first time point, said control drive unit was used the said light source of first mode activated; In this embodiment, first pattern is constant current i for drive current as shown in Figure 1 for example.In other embodiments, first pattern also can adopt like bright pattern of aforesaid height or high color expression mode.After said light source reaches the very first time point service time; Said control drive unit transfers to use the said light source of second mode activated according to the temporal information of timing unit; As long as this conversion is easy to realize with regard to existing Electromechanical Control technology, and is general change part software parameter.Under said first pattern, because drive current is constant current, to export first driving current value be i to said control drive unit when the light of said light source passes the first look block in this embodiment; Said control drive unit is exported second driving current value also for i when the light of said light source passes the second look block.Under said second pattern, as shown in Figure 4, to export the 3rd driving current value be 0.9i to (time slot t31) said control drive unit when the light of said light source passes the first look block; To export 4 wheel driven streaming current value be 1.3i to (time slot t32) said control drive unit when the light of said light source passes the second look block; (time slot t33) said control drive unit output driving current value is 0.8i when the light of said light source passes the 3rd look block; (time slot t34) said control drive unit output driving current i when the light of said light source passes the 4th look block.Said the 3rd drive current is less than said first drive current; Said 4 wheel driven streaming current is greater than said second drive current; The light-source brightness that is the corresponding time slot of at least one light block increases; The light-source brightness of the corresponding time slot of at least one dark block reduces; Be equivalent to increase light block proportion in colour wheel, increased the brightness of projection display equipment.
In production application, said very first time point can be selected between 700 hours to 1500 hours, in this embodiment, elected 1000 hours as.Through emulation experiment, after work 1000 hours, the projection arrangement of this embodiment can improve brightness more than 5% than the projection arrangement of prior art, and can prolong light source life about 500 hours.
On above-mentioned embodiment basis, after said light source reaches second time point service time, said control drive unit can then use three-mode to drive said light source; Said second time point is after said very first time point.As shown in Figure 5, under said three-mode, to export the 5th driving current value be 0.8i to (time slot t41) said control drive unit when the light of said light source passes the first look block; To export the 6th driving current value be 1.5i to (time slot t42) said control drive unit when the light of said light source passes the second look block; (time slot t43) said control drive unit output driving current value is 0.7i when the light of said light source passes the 3rd look block; (time slot t44) said control drive unit output driving current i when the light of said light source passes the 4th look block.Said the 5th drive current is less than said the 3rd drive current; Said the 6th drive current is greater than said 4 wheel driven streaming current.The light-source brightness that is the corresponding time slot of at least one light block increases, and the light-source brightness of the corresponding time slot of at least one dark block reduces, and is equivalent to further increase light block proportion in colour wheel, has increased the brightness of projection display equipment.This increase is not unconfined, and in general, the maximal value of light source drive current and the ratio of minimum value should not surpass 5.
Above-mentioned second time point was generally selected between 1700 hours to 2500 hours, elected 2000 hours in this embodiment as.
The driving current value that each time slot is corresponding in the above-mentioned embodiment is merely an example, can optionally adjust in other embodiments.
In the projection display equipment of other embodiment, can comprise user interface, through said user interface the mode of operation of said control drive unit can be set manually, for example directly selected aforesaid second pattern or the three-mode of using.
Claims (10)
1. a projection display equipment is characterized in that comprising control drive unit, light source, colour wheel, timing unit;
Said control drive unit drives said light source;
Said colour wheel has the first look block, the second look block, and the said first look block is white or cyan, and the said second look block is red, blue, yellow or green;
Said timing unit writes down the service time of said light source;
When said light source service time was before very first time point, said control drive unit was used the said light source of first mode activated; After said light source reaches the very first time point service time, said control drive unit then use the said light source of second mode activated;
Under said first pattern, said control drive unit is exported first drive current when the light of said light source passes the first look block; Said control drive unit is exported second drive current when the light of said light source passes the second look block;
Under said second pattern, said control drive unit is exported the 3rd drive current when the light of said light source passes the first look block; Said control drive unit is exported the 4 wheel driven streaming current when the light of said light source passes the second look block; Said the 3rd drive current is less than said first drive current; Said 4 wheel driven streaming current is greater than said second drive current.
2. projection display equipment according to claim 1 is characterized in that the said very first time is o'clock between 700 hours to 1500 hours.
3. projection display equipment according to claim 1 is characterized in that after said light source reaches second time point service time, said control drive unit then use three-mode to drive said light source; Said second time point is after said very first time point; Under said three-mode, said control drive unit is exported the 5th drive current when the light of said light source passes the first look block; Said control drive unit is exported the 6th drive current when the light of said light source passes the second look block; Said the 5th drive current is less than said the 3rd drive current; Said the 6th drive current is greater than said 4 wheel driven streaming current.
4. projection display equipment according to claim 3 is characterized in that said second time point is between 1700 hours to 2500 hours.
5. projection display equipment according to claim 1 is characterized in that comprising user interface, and the mode of operation of said control drive unit can manually be set through said user interface.
6. projection display equipment according to claim 1 is characterized in that said light source is a bulb.
7. a light source driving method is applicable to a kind of projection display equipment, and said projection display equipment comprises light source, colour wheel, timing unit; Said colour wheel has the first look block, the second look block, and the said first look block is white or cyan, and the said second look block is red, blue, yellow or green; Said timing unit writes down the service time of said light source; Said method comprises:
When said light source service time is before very first time point, use the said light source of first mode activated;
After said light source reaches the very first time point service time, use the said light source of second mode activated;
Under said first pattern,, the light of said light source exports first drive current when passing the first look block to said light source; , the light of said light source exports second drive current when passing the second look block to said light source;
Under said second pattern,, the light of said light source exports the 3rd drive current when passing the first look block to said light source; , the light of said light source exports the 4 wheel driven streaming current when passing the second look block to said light source; Said the 3rd drive current is less than said first drive current; Said 4 wheel driven streaming current is greater than said second drive current.
8. light source driving method according to claim 7 is characterized in that the said very first time is o'clock between 700 hours to 1500 hours.
9. light source driving method according to claim 7 is characterized in that after said light source reaches second time point service time, using three-mode to drive said light source; Said second time point is after said very first time point; Under said three-mode,, the light of said light source exports the 5th drive current when passing the first look block to said light source; Said control drive unit is exported the 6th drive current when the light of said light source passes the second look block; Said the 5th drive current is less than said the 3rd drive current; Said the 6th drive current is greater than said 4 wheel driven streaming current.
10. light source driving method according to claim 9 is characterized in that said second time point is between 1700 hours to 2500 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166147XA CN101957542B (en) | 2010-04-18 | 2010-04-18 | Projection display device and light source driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166147XA CN101957542B (en) | 2010-04-18 | 2010-04-18 | Projection display device and light source driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101957542A CN101957542A (en) | 2011-01-26 |
| CN101957542B true CN101957542B (en) | 2012-06-06 |
Family
ID=43484951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010166147XA Active CN101957542B (en) | 2010-04-18 | 2010-04-18 | Projection display device and light source driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101957542B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6440477B2 (en) * | 2014-12-09 | 2018-12-19 | キヤノン株式会社 | Light source control device and image projection device |
| CN107664905A (en) * | 2016-07-29 | 2018-02-06 | 深圳市光峰光电技术有限公司 | The method of projection arrangement, light-source system and its control electric current |
| CN113052155B (en) * | 2021-02-03 | 2024-04-02 | 深圳赋能光达科技有限公司 | Light source brightness regulator, structured light projector, identity recognition device and electronic equipment |
-
2010
- 2010-04-18 CN CN201010166147XA patent/CN101957542B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101957542A (en) | 2011-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103680413B (en) | Image processing device and image processing method | |
| CN101667411B (en) | Dynamic backlight control method and device | |
| CN101957542B (en) | Projection display device and light source driving method | |
| CN110390907A (en) | A kind of display screen drive chip, display drive circuit and display panel drive method | |
| CN104091571B (en) | A kind of display system | |
| CN205160658U (en) | Constant current drive controlling means and laser television | |
| CN103487968A (en) | Display panel and displayer | |
| CN103489411A (en) | Display-screen color maintenance method and system | |
| CN103594058B (en) | A kind of LED display driving circuit | |
| CN210443246U (en) | Display screen driving chip, display screen driving circuit and display device | |
| CN109712560A (en) | A kind of driving control system of LED display module | |
| CN102014539B (en) | Backlight control circuit | |
| CN101266345B (en) | Backlight module and its drive method and LCD device | |
| CN202042160U (en) | Novel energy-saving LED (light-emitting diode) display screen | |
| CN203399371U (en) | Driving module for LED (Light-Emitting Diode) light source of projector | |
| CN101808209A (en) | Method and circuit for dynamically modulating digital brightness of time sequence LCOS minisize projector | |
| CN202838923U (en) | Minitype near-eye display connector drive and control circuit structure | |
| CN102572451A (en) | Achieving method of color gamut transformation in laser display | |
| CN201326995Y (en) | LED fluorescent tube | |
| CN202003131U (en) | Single-system time-sharing color projector of solid light source | |
| CN201489800U (en) | Display device capable of providing multiple operation modes | |
| CN103237385A (en) | Remote control device and method for DMX (digital multiplex) decoder | |
| CN101994930A (en) | Light-emitting diode device with compensation mechanism | |
| CN206133150U (en) | LED, lamp strip, backlight and liquid crystal display module | |
| CN202876960U (en) | Light-emitting diode (LED) centrifugal machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |