CN200965487Y - A flat display bright-room contrast ratio measurement device - Google Patents
A flat display bright-room contrast ratio measurement device Download PDFInfo
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- CN200965487Y CN200965487Y CN 200620105462 CN200620105462U CN200965487Y CN 200965487 Y CN200965487 Y CN 200965487Y CN 200620105462 CN200620105462 CN 200620105462 CN 200620105462 U CN200620105462 U CN 200620105462U CN 200965487 Y CN200965487 Y CN 200965487Y
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- room contrast
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Abstract
The utility model discloses a bright-room contrast ratio measuring device of a panel display, which includes a work bench supported the measured display screen, an illuminated integrating sphere, an illuminating light source, an imaging lens and a light measuring instrument, the illuminated integrating sphere is opened with a light output hole, a light input hole and a light measuring hole, the light output hole is arranged above the work bench, the light measuring hole is arranged at the side which is opposite to the light output hole, the imaging lens is arranged at the outside of the illuminated integrating sphere and between the light measuring hole and the light measuring instrument, an optical axis of the light measuring instrument is overlapped with an optical axis of the imaging lens, the axis drills through the center of the light measuring hole and the center of the light output hole, and an included angle of 0 to 10 degrees is formed between the axis and the normal of the display screen surface of the work bench, the illumination light source is arranged at the outside of the light input hole, the inner wall of the illuminated integrating sphere is provided with a blocking screen which is used to block the light of the light input hole to irradiate on the light output hole directly, and the inner surface of the illuminated integrating sphere and the surface of the blocking screen are coated with diffuse reflectance coatings. The device has the advantages of high bright-room contrast ratio measuring accuracy, good bright-room simulation consistency and easy operation.
Description
Technical field
The utility model relates to a kind of light-room contrast's measurement mechanism of flat-panel monitor.
Background technology
Aspect the contrast measurement of flat-panel monitor (FPD), traditional method has two kinds: a kind of is the fluorescent lamp lighting method that adopts in the darkroom, forms bright chamber condition.Factors such as this method exists that geometric condition is uncertain, the luminous instability of daylight lamp, spectrum are inconsistent, so the repeatability of measurement result, bright chamber simulation consistance are poor.Another kind is to adopt the integrating sphere illumination, the display screen of measuring is placed the centre of sphere of integrating sphere, form the bright chamber condition of diffusion by the reflected light of ball wall, although this method diffuse conditions and data stability are all good than first kind, but still have the absorption of the display screen back side, support to illumination light, influence measuring accuracy, in addition, at the integrating sphere center display screen is installed, measuring operation is very inconvenient.
Summary of the invention
The purpose of this utility model provides a kind of light-room contrast's measurement mechanism of measuring accurate, bright chamber simulation high conformity, easy to operate flat-panel monitor.
Light-room contrast's measurement mechanism of flat-panel monitor of the present utility model comprises: the worktable that supports tested display screen, the illumination integrating sphere, lighting device, imaging len and optical measuring instruments, have light hole on the illumination integrating sphere, light well and light-measuring hole, light hole is directly over worktable, light-measuring hole is in a relative side of light hole, imaging len is located at outside the illumination integrating sphere, between light-measuring hole and optical measuring instruments, the optical axis of optical measuring instruments and the optical axis coincidence of imaging len, this axis passes light-measuring hole center and light hole center, and constitute the angle of 0～10 degree with the normal that is bearing in the display screen surface on the worktable, lighting device is positioned at the light well place, be equipped with at illumination integrating sphere inwall and be used to block the baffle plate of light well light direct projection, scribble diffuse reflection coating on the inside surface and the baffle plate surface of illumination integrating sphere to light hole.
Principle of work
Tested display screen is placed on the worktable, open lighting device, illuminating ray exposes to display screen surface after the uniform diffuse reflection in the illumination integrating sphere, the stack that display screen sends illumination the integrating sphere dark field mode and the bright field mode light that diffuse assemble to optical measuring instruments through imaging len, convert light signal to calculate the light-room contrast electric signal by optical measuring instruments, be defeated by computing machine.
The beneficial effects of the utility model are:
1, adopts the illumination integrating sphere to form uniform diffuse illumination light, make and measure accurate, bright chamber simulation high conformity, and tested display screen is put in outside the light hole of illumination integrating sphere, be convenient to operation.
2, because the angle of tested display screen surface normal direction 0～10 degree of the light-measuring hole misalignment of illumination integrating sphere makes light-measuring hole can not fall on the imaging len by the direct reflection picture of tested display screen surface, improved the precision of test.
3, the lighting device wide material sources that adopt of the utility model, solved lighting source in the traditional measurement method spectral distribution must with CIE (International Commission on Illumination) A working flare, the perhaps difficult problem of CIE (International Commission on Illumination) D65 working flare unanimity.
Description of drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is that the illumination integrating sphere in the utility model device is the structural representation of hemisphere;
Fig. 3 is that the illumination integrating sphere in the utility model device is the structural representation of super hemisphere;
Fig. 4 is a kind of scheme of installation of illumination integrating sphere;
Fig. 5 is a kind of lighting device synoptic diagram;
Fig. 6 is the monochromation illumination system schematic of variable wavelength.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
With reference to Fig. 1, light-room contrast's measurement mechanism of flat-panel monitor of the present utility model comprises: the worktable 7 that supports tested display screen 6, illumination integrating sphere 3, lighting device 4, imaging len 2 and optical measuring instruments 1, illumination has light hole 8, light well 9 and light-measuring hole 10 on the integrating sphere 3, illumination integrating sphere 3 can be as shown in Figure 1 whole ball, also can be as shown in Figure 2 hemisphere or super hemisphere integrating sphere as shown in Figure 3.The light hole 8 of illumination integrating sphere 3 is directly over worktable 7, light-measuring hole 10 is in a relative side of light hole 8, imaging len 2 is located at outside the illumination integrating sphere 3, between light-measuring hole 10 and optical measuring instruments 1, the optical axis coincidence of the optical axis of optical measuring instruments 1 and imaging len 2, this axis passes light-measuring hole 10 centers and light hole 8 centers, and constitutes 0～10 angle of spending with the display screen 6 normal to a surface m that are bearing on the worktable 7.Said optical measuring instruments 1 can be spectral radiant emittance meter or nitometer.Lighting device 4 is positioned at light well 9 places, is equipped with at illumination integrating sphere inwall to be used to block the baffle plate 5 of light well 9 light direct projections to light hole 8, scribbles diffuse reflection coating on the inside surface and baffle plate 5 surfaces of illumination integrating sphere.Said diffuse reflection coating can be the diffuse reflection coating of barium sulphate or other spectral neutrality.In the example shown in Figure 1, between light well 9 and lighting device 4, be provided with diaphragm 26, can control the switch of illumination light like this by diaphragm, prolong the life-span of lamp, the preheating time when the shortening lamp repeatedly starts.
For the ease of tested display screen 6 is installed, can on worktable 7, fix a vertical rod 25 as shown in Figure 4, illumination integrating sphere 3 is hinged with vertical rod 25, and the integrating sphere that throws light on like this can be rotated away around vertical rod.
For the ease of measuring display screen brightness at various temperatures, worktable 7 can adopt a program-controlled testing table of temperature.
Used lighting device 4 can be a lighting source in the utility model, or is made up of a lighting source 27 and single or multifiber 24, and wherein an end of optical fiber links to each other with lighting source, and the other end of optical fiber is positioned at light well place (as shown in Figure 5).Said lighting source can be the continuous light source of halogen tungsten lamp or spherical xenon lamp or other visible range spectrum or also can be the monochromation illumination system of variable wavelength that the wavelength coverage of monochromation illumination system can be from 380nm to 780nm.Like this, optical measuring instruments just can record the spectral radiance factor of tested display screen under the monochromatic spectrum illumination of each wavelength, thereby can directly calculate the light-room contrast of tested display screen under CIE A, CIE D65 or other illuminating lamp by the inner or outside data processor that connects of optical measuring instruments.
The monochromation illumination system of variable wavelength is made up of illuminating lens 19, monochromator 20, collector lens 22, illuminating lamp 23 and the optical gate 21 that is positioned at optional position on the illuminating bundle optical axis as shown in Figure 6.In the legend, optical gate 21 is between collector lens 22 and monochromator 20.The light beam of illuminating lamp 23 converges on the entrance slit of monochromator 20 by condenser 22, utilize optical gate 21 can control the switch of illumination light, avoid frequent key lamp in the measurement of display screen details in a play not acted out on stage, but told through dialogues and bright field, can prolong the life-span of lamp like this, the preheating time when the shortening lamp repeatedly starts.The monochromatic spectrum of monochromator 20 outgoing converges on the light well 9 of integrating sphere 3 through illuminating lens 19.Here, monochromator can be grating monochromator, prism monochromator or narrow band pass filter.
Claims (9)
1. light-room contrast's measurement mechanism of a flat-panel monitor, it is characterized in that comprising: the worktable (7) that supports tested display screen (6), illumination integrating sphere (3), lighting device (4), imaging len (2) and optical measuring instruments (1), have light hole (8) on the illumination integrating sphere (3), light well (9) and light-measuring hole (10), light hole (8) is directly over worktable (7), light-measuring hole (10) is in a relative side of light hole (8), imaging len (2) is located at outside the illumination integrating sphere (3), be positioned between light-measuring hole (10) and the optical measuring instruments (1), the optical axis coincidence of the optical axis of optical measuring instruments (1) and imaging len (2), this axis passes light-measuring hole (10) center and light hole (8) center, and be bearing in display screen (6) normal to a surface (m) on the worktable (7) and constitute the angle of 0～10 degree, lighting device (4) is positioned at light well (9) and locates, be equipped with at illumination integrating sphere inwall and be used to block the baffle plate (5) of light well (9) light direct projection, scribble diffuse reflection coating on the inside surface and baffle plate (5) surface of illumination integrating sphere to light hole (8).
2. light-room contrast's measurement mechanism of flat-panel monitor according to claim 1, it is characterized in that said lighting device (4) is a lighting source, or form by a lighting source and single or multifiber, wherein an end of optical fiber links to each other with lighting source, and the other end of optical fiber is positioned at light well (9) and locates.
3. light-room contrast's measurement mechanism of flat-panel monitor according to claim 2 is characterized in that lighting source is the monochromation illumination system of halogen tungsten lamp or spherical xenon lamp or visible range spectrum continuous light source or variable wavelength.
4. light-room contrast's measurement mechanism of flat-panel monitor according to claim 3, the monochromation illumination system that it is characterized in that said variable wavelength is made up of illuminating lens (19), monochromator (20), collector lens (22), illuminating lamp (23) and the optical gate (21) that is positioned at optional position on the illuminating bundle optical axis.
5. light-room contrast's measurement mechanism of flat-panel monitor according to claim 1, the integrating sphere (3) that it is characterized in that throwing light on are whole ball, hemisphere or super hemisphere integrating spheres.
6. light-room contrast's measurement mechanism of flat-panel monitor according to claim 1 is characterized in that optical measuring instruments (1) is spectral radiant emittance meter or nitometer.
7. light-room contrast's measurement mechanism of flat-panel monitor according to claim 1 is characterized in that fixing a vertical rod (25) on worktable (7), and illumination integrating sphere (3) is hinged with vertical rod (25).
8. light-room contrast's measurement mechanism of flat-panel monitor according to claim 1 is characterized in that worktable (7) is a program-controlled testing table of temperature.
9. light-room contrast's measurement mechanism of flat-panel monitor according to claim 1 is characterized in that being provided with diaphragm (26) between light well (9) and lighting device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620105462 CN200965487Y (en) | 2006-07-07 | 2006-07-07 | A flat display bright-room contrast ratio measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620105462 CN200965487Y (en) | 2006-07-07 | 2006-07-07 | A flat display bright-room contrast ratio measurement device |
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| Publication Number | Publication Date |
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| CN200965487Y true CN200965487Y (en) | 2007-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620105462 Expired - Lifetime CN200965487Y (en) | 2006-07-07 | 2006-07-07 | A flat display bright-room contrast ratio measurement device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920510B (en) * | 2006-07-07 | 2010-04-21 | 浙江大学三色仪器有限公司 | Daylight contrast measuring apparatus for flat panel display device |
| CN102175312A (en) * | 2010-12-31 | 2011-09-07 | 四川虹欧显示器件有限公司 | Method for measuring luminous flux |
| CN102033055B (en) * | 2007-03-01 | 2013-05-29 | 浜松光子学株式会社 | Light detection device |
| CN104296971A (en) * | 2014-10-22 | 2015-01-21 | 中国电子科技集团公司第四十一研究所 | Display contrast calibration method and device under high luminance environment |
| CN107525650A (en) * | 2016-06-22 | 2017-12-29 | 北京疯景科技有限公司 | Camera lens luminosity response scale determines device and method |
| CN111158175A (en) * | 2020-01-19 | 2020-05-15 | 苏州奥科飞光电科技有限公司 | Testing device for display screen highlight contrast ratio |
| CN113687504A (en) * | 2021-09-03 | 2021-11-23 | 浙江理工大学绍兴柯桥研究院有限公司 | Uniform lighting device for observing tiny objects and using method thereof |
-
2006
- 2006-07-07 CN CN 200620105462 patent/CN200965487Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920510B (en) * | 2006-07-07 | 2010-04-21 | 浙江大学三色仪器有限公司 | Daylight contrast measuring apparatus for flat panel display device |
| CN102033055B (en) * | 2007-03-01 | 2013-05-29 | 浜松光子学株式会社 | Light detection device |
| CN102175312A (en) * | 2010-12-31 | 2011-09-07 | 四川虹欧显示器件有限公司 | Method for measuring luminous flux |
| CN104296971A (en) * | 2014-10-22 | 2015-01-21 | 中国电子科技集团公司第四十一研究所 | Display contrast calibration method and device under high luminance environment |
| CN107525650A (en) * | 2016-06-22 | 2017-12-29 | 北京疯景科技有限公司 | Camera lens luminosity response scale determines device and method |
| CN111158175A (en) * | 2020-01-19 | 2020-05-15 | 苏州奥科飞光电科技有限公司 | Testing device for display screen highlight contrast ratio |
| CN113687504A (en) * | 2021-09-03 | 2021-11-23 | 浙江理工大学绍兴柯桥研究院有限公司 | Uniform lighting device for observing tiny objects and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20071024 Effective date of abandoning: 20060707 |