CN202794764U - Backplane of liquid crystal display device - Google Patents
Backplane of liquid crystal display device Download PDFInfo
- Publication number
- CN202794764U CN202794764U CN 201220291619 CN201220291619U CN202794764U CN 202794764 U CN202794764 U CN 202794764U CN 201220291619 CN201220291619 CN 201220291619 CN 201220291619 U CN201220291619 U CN 201220291619U CN 202794764 U CN202794764 U CN 202794764U
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- zone
- backboard
- flatness
- jiaos
- backplane
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Abstract
The utility model discloses a backplane of a liquid crystal display device. The backplane is provided with different areas. Each area is provided with different flatness. Positive deviation values of flatness of areas on four corners of the backplane are the largest among those of other areas. Absolute values of negative deviation values of flatness of areas in the middle of the backplane are the largest among those of other areas. The difference of the positive deviation values of the areas on the four corners of the backplane and areas in the middle of the backplane is smaller than or equals to a first preset value. The difference of the absolute values of the negative deviation values of flatness of areas on the four corners of the backplane and areas in the middle of the backplane is smaller than or equals to a second preset value. The sum of the positive deviation values of flatness of areas on fours corners of the backplane and the absolute values of negative deviation values of flatness of areas in the middle of the backplane is smaller than or equals to a third preset value. The backplane of the liquid crystal display device solves the problem that display frame is poor caused by a poor flatness of the backplane.
Description
Technical field
The utility model relates to field of liquid crystal display, particularly a kind of backboard of liquid crystal indicator.
Background technology
Prior art dorsulum such as Chinese patent are described in the publication number CN101865435A.Backboard contacts with light guide plate, and it supports light guide plate.
In the prior art, the side-light type liquid crystal indicator requires very high for the flatness of backboard, need to be to the strict management and control of the flatness of backboard.If the flatness of backboard self is not good enough, then will directly form bright line in light guide plate, local light leak also may be caused in the part position, thereby affects the homogeneity of liquid crystal indicator display frame, produces substandard product.
Yet it is very difficult to reach desired flatness.For making the backboard flatness reach this strict demand, need meticulousr backboard mfg. moulding die, thereby increased the cost that backboard is made.
The utility model content
The backboard of the liquid crystal indicator that the utility model provides produces the bad problem of display frame with solution owing to the backboard flatness is not good enough.
The utility model discloses a kind of backboard of liquid crystal indicator,
Described backboard has different zones;
Regional has corresponding flatness;
The forward deviation value of flatness in zone that is arranged in four jiaos of backboards is maximum at regional;
The absolute value of negative sense deviation value of flatness that is arranged in the zone in the middle of the backboard is maximum at regional;
The difference of the forward deviation value of the described zone that is positioned at four jiaos of backboards and the described flatness that is positioned at the zone in the middle of the backboard is less than or equal to the first preset value;
The difference of the absolute value of the negative sense deviation value of the described flatness that is positioned at zone in the middle of the backboard and the described zone that is positioned at four jiaos of backboards is less than or equal to the second preset value;
The absolute value of the negative sense deviation value of the forward deviation value of the flatness in the described zone that is positioned at four jiaos of backboards and the described flatness that is positioned at the zone in the middle of the backboard and less than or equal to the 3rd preset value.
Better, described the first preset value is 0.2 millimeter.
Better, described the second preset value is 0.2 millimeter.
Better, described the 3rd preset value is 1 millimeter.
Better, identical with the negative sense irrelevance in the described zone that is positioned at the backboard centre at described zone and the negative sense irrelevance in described zone between the zone of four jiaos of backboards in the middle of the backboard, the forward irrelevance is identical with the forward irrelevance in the described zone that is positioned at four jiaos of backboards.
Better, identical with the described flatness that is positioned at the zone in the middle of the backboard in the flatness in the zone between two jiaos on the backboard minor face.
The beneficial effect of the utility model embodiment is: divide by backboard being carried out the zone, for each zone limits corresponding flatness, and form four jiaos high of backboards, middle low state, contact well so that backboard and light guide plate are smooth, avoid the generation of the image quality such as bright line and light leak bad phenomenon on the backlight module.
Description of drawings
Fig. 1 is the synoptic diagram of embodiment of the backboard of the utility model liquid crystal indicator;
Fig. 2 is the synoptic diagram of embodiment of the backboard of the utility model liquid crystal indicator;
Fig. 3 is the process flow diagram of manufacture method of the backboard of the utility model liquid crystal indicator.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
The backboard of liquid crystal indicator of the present utility model is as described below.
Backboard has different zones;
Regional has corresponding flatness;
The forward deviation value of flatness in zone that is arranged in four jiaos of backboards is maximum at regional;
The absolute value of negative sense deviation value of flatness that is arranged in the zone in the middle of the backboard is maximum at regional;
The difference of the zone that is positioned at four jiaos of backboards and the forward deviation value of the flatness that is positioned at the zone in the middle of the backboard is less than or equal to the first preset value;
Be positioned at the difference of zone and the absolute value of the negative sense deviation value of the flatness in the zone that is positioned at four jiaos of backboards in the middle of the backboard less than or equal to the second preset value;
Be positioned at four jiaos of backboards the zone flatness forward deviation value and the negative sense deviation value of the flatness that is positioned at the zone in the middle of the backboard absolute value and less than or equal to the 3rd preset value.
Be arranged in the forward deviation value of flatness in zone of four jiaos of backboards in the maximum expression of regional: be positioned at the forward deviation value of flatness in zone of four jiaos of backboards more than or equal to the forward deviation value of other regional flatnesses of backboard.
Be arranged in the absolute value of negative sense deviation value of flatness in the zone in the middle of the backboard in the maximum expression of regional: be positioned at the absolute value of negative sense deviation value of flatness in the zone in the middle of the backboard more than or equal to the absolute value of the negative sense deviation value of other regional flatnesses of backboard.
Referring to Fig. 1, be the synoptic diagram of the embodiment of the backboard of the utility model liquid crystal indicator.
In this embodiment, the zone that is positioned at four jiaos of backboards is angular zone, is respectively the first angular zone, the second angular zone, and the third angle zone, the 4th angular zone is expressed as F1, F2, F3, F4.
Being positioned at the middle zone of backboard is zone line, is expressed as C.
The forward deviation value of the flatness of angular zone is maximum in regional.The absolute value of the negative sense deviation value of the flatness of zone line is maximum in regional.
The forward deviation value of the flatness of angular zone and zone line poor, the absolute value of the negative sense deviation value of the flatness of zone line and angular zone poor, and the absolute value of maximum forward deviation value and maximum negative sense deviation value and, restriction is within the limits prescribed.Thereby, the flatness of backboard is arranged in certain scope.This restricted portion is the scope that sets in advance.
So, low, four jiaos of high backboards in the middle of having formed on the whole.So that backboard contacts with light guide plate is smooth, avoid the generation of the image quality such as bright line and light leak bad phenomenon on the backlight module.
In a more excellent embodiment, between 0 to 0.2 millimeter, namely the first preset value is 0.2 millimeter in the difference of the forward deviation value of the flatness in the zone of four jiaos of backboards and the zone in the middle of backboard.
As shown in Figure 1, the difference of the forward deviation value of the flatness of the forward deviation value of the flatness of angular zone and zone line is not more than 0.2 millimeter.
So, the gap of the forward deviation value of the flatness of pilot angle zone and zone line is in 0.2 millimeter scope.
In a more excellent embodiment, the zone in the middle of backboard and in the difference of the absolute value of the negative sense deviation value of the flatness in the zone of four jiaos of backboards between 0 to 0.2 millimeter, namely the second preset value is 0.2 millimeter.
As shown in Figure 1, the difference of the absolute value of the negative sense deviation value of the flatness of zone line and angular zone is not more than 0.2 millimeter.
So, the gap of the absolute value of the negative sense deviation value of the flatness of control zone line and angular zone is in 0.2 millimeter scope.
This 0.2 millimeter is the preferred value that by experiment test obtains, controlling four jiaos exceeds in 0.2 millimeter scope than the centre, can be so that when guaranteeing to avoid the generation of the image quality such as bright line and light leak bad phenomenon on the backlight module, can so that mould is too accurate, not save cost again.
In a better embodiment, the absolute value of the negative sense deviation value of the flatness in the forward deviation value of the flatness in the zone of four jiaos of backboards and the zone in the middle of backboard and be value between 0 to 1 millimeter, namely the 3rd preset value is 1 millimeter.So, the whole flatness of backboard is limited in 1 millimeter.
This 1 millimeter is the preferred value that by experiment test obtains, and guarantees the threshold value of picture good quality for using the utility model.As seen adopt the utility model, the requirement of the flatness of backboard integral body is reduced, saved cost.
In a better embodiment, negative sense irrelevance in the negative sense irrelevance in the zone in the middle of backboard and the zone between the zone of four jiaos of the backboards zone middle with being positioned at backboard is identical, and the forward irrelevance is identical with the forward irrelevance in the zone that is positioned at four jiaos of backboards.
As shown in Figure 1, be interval region in the zone in the middle of backboard and the zone between the zone of four jiaos of backboards, be expressed as D.This interval region is used for from middle zone to the angular zone transition between angular zone and zone line, and therefore, the negative sense irrelevance of interval region is identical with the negative sense irrelevance of zone line, and the forward irrelevance is identical with the forward irrelevance of angular zone.So, so that light guide plate contacts better with backboard.
In a better embodiment, identical with the flatness in zone in the middle of being positioned at backboard in the flatness in the zone between two jiaos on the backboard minor face.
As shown in Figure 1, backboard is rectangle, and the first angular zone and the second angular zone are positioned at a side minor face of backboard, is two gap areas between the first angular zone and the second angular zone, is expressed as respectively A7 and A8.Third angle zone and the 4th angular zone are positioned at the opposite side minor face of backboard, are two gap areas between third angle zone and the 4th angular zone, are expressed as respectively A5 and A6.
The flatness of gap area is identical with zone line, matches with angular zone, and low in the middle of so forming in the part, the state that both sides are high further improves light guide plate and contacting that backboard is seen, and improves the picture disply quality.
Embodiment
The utility model embodiment as shown in Figure 2.In the present embodiment, zone line comprising 5 measurement points, is expressed as C1～C5; Be positioned at the angular zone of four jiaos of backboards, be expressed as F1～F4; Interval region between zone line and angular zone is two, and the first interval region comprising 9 test points, is expressed as D1～D9, and the second interval region comprising 9 test points, is expressed as D10～D18.Be positioned at the gap area between two jiaos of same minor face of backboard, be expressed as respectively A5～A8.In addition, gap area also is positioned between a long limit of zone line and backboard, becomes T shape, is expressed as respectively A1～A4.Both sides at the vertical line of T shape have elevated regions, are expressed as B1 and B2.Fig. 2 bend zone is for being used for the supporting zone of supporting back board in the test.
Measure take test point D1 as benchmark.
The flatness of gap area A1～A8 is+0/-0.8mm;
The flatness of elevated regions B1～B2 is+0.2/-0.2mm;
The flatness of zone line C1～C5 is+0/-0.8mm;
The flatness of interval region D1～D18 is+0.2/-0.8mm;
The flatness of angular zone F1～F4 is+0.2/-0.6mm.
So, backboard is controlled to be four jiaos high, middle low, so that backboard and light guide plate surface of contact have good flatness, avoids the generation of the image quality such as bright line and light leak bad phenomenon on the backlight module.
The method of a kind of backboard of making liquid crystal indicator of the present utility model as shown in Figure 3.
S100 is divided into different zones with backboard.
S200, carry out following setting to the flatness of regional:
The forward deviation value of flatness in zone that is arranged in four jiaos of backboards is maximum at regional;
The absolute value of negative sense deviation value of flatness that is arranged in the zone in the middle of the backboard is maximum at regional;
The difference of the forward deviation value of the described zone that is positioned at four jiaos of backboards and the described flatness that is positioned at the zone in the middle of the backboard is less than or equal to the first preset value;
The difference of the absolute value of the negative sense deviation value of the described flatness that is positioned at zone in the middle of the backboard and the described zone that is positioned at four jiaos of backboards is less than or equal to the second preset value;
The absolute value of the negative sense deviation value of the forward deviation value of the flatness in the described zone that is positioned at four jiaos of backboards and the described flatness that is positioned at the zone in the middle of the backboard and less than or equal to the 3rd preset value.
Low, four jiaos of high backboards in the middle of having formed on the whole.So that backboard contacts with light guide plate is smooth, avoid the generation of the image quality such as bright line and light leak bad phenomenon on the backlight module.
Preferably, described the first preset value is 0.2 millimeter; Described the second preset value is 0.2 millimeter.
This 0.2 millimeter is the preferred value that by experiment test obtains, controlling four jiaos exceeds in 0.2 millimeter scope than the centre, can be so that when guaranteeing to avoid the generation of the image quality such as bright line and light leak bad phenomenon on the backlight module, can so that mould is too accurate, not save cost again.
Preferably, described the 3rd preset value is 1 millimeter.
This 1 millimeter is the preferred value that by experiment test obtains, and guarantees the threshold value of picture good quality for using the utility model.As seen adopt the utility model, the requirement of the flatness of backboard integral body is reduced, saved cost.
Preferably, it is identical with the negative sense irrelevance in the described zone that is positioned at the backboard centre to be arranged on described zone and the negative sense irrelevance in described zone between the zone of four jiaos of backboards in the middle of the backboard, and the forward irrelevance is identical with the forward irrelevance in the described zone that is positioned at four jiaos of backboards.
Be interval region in the middle zone regional and between the zone of four jiaos of backboards of backboard.This interval region is used for from middle zone to the angular zone transition between angular zone and zone line, and therefore, the negative sense irrelevance of interval region is identical with the negative sense irrelevance of zone line, and the forward irrelevance is identical with the forward irrelevance of angular zone.So, so that light guide plate contacts better with backboard.
Preferably, arrange in the flatness in the zone between two jiaos on the backboard minor face identical with the flatness in the described zone that is positioned at the backboard centre.
Backboard is rectangle, is gap area in the zone between two jiaos on the backboard minor face.The flatness of gap area is identical with zone line, matches with angular zone, and low in the middle of so forming in the part, the state that both sides are high further improves light guide plate and contacting that backboard is seen, and improves the picture disply quality.
The above is preferred embodiment of the present utility model only, is not be used to limiting protection domain of the present utility model.All any modifications of within spirit of the present utility model and principle, doing, be equal to replacement, improvement etc., all be included in the protection domain of the present utility model.
Claims (6)
1. the backboard of a liquid crystal indicator is characterized in that,
Described backboard has different zones;
Regional has corresponding flatness;
The forward deviation value of flatness in zone that is arranged in four jiaos of backboards is maximum at regional;
The absolute value of negative sense deviation value of flatness that is arranged in the zone in the middle of the backboard is maximum at regional;
The difference of the forward deviation value of the described zone that is positioned at four jiaos of backboards and the described flatness that is positioned at the zone in the middle of the backboard is less than or equal to the first preset value;
The difference of the absolute value of the negative sense deviation value of the described flatness that is positioned at zone in the middle of the backboard and the described zone that is positioned at four jiaos of backboards is less than or equal to the second preset value;
The absolute value of the negative sense deviation value of the forward deviation value of the flatness in the described zone that is positioned at four jiaos of backboards and the described flatness that is positioned at the zone in the middle of the backboard and less than or equal to the 3rd preset value.
2. backboard according to claim 1 is characterized in that,
Described the first preset value is 0.2 millimeter.
3. backboard according to claim 1 is characterized in that,
Described the second preset value is 0.2 millimeter.
4. backboard according to claim 1 is characterized in that,
Described the 3rd preset value is 1 millimeter.
5. backboard according to claim 1 is characterized in that,
Identical with the negative sense irrelevance in the described zone that is positioned at the backboard centre at described zone and the negative sense irrelevance in described zone between the zone of four jiaos of backboards in the middle of the backboard, the forward irrelevance is identical with the forward irrelevance in the described zone that is positioned at four jiaos of backboards.
6. backboard according to claim 1 is characterized in that,
Identical with the described flatness that is positioned at the zone in the middle of the backboard in the flatness in the zone between two jiaos on the backboard minor face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291619 CN202794764U (en) | 2012-06-19 | 2012-06-19 | Backplane of liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220291619 CN202794764U (en) | 2012-06-19 | 2012-06-19 | Backplane of liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794764U true CN202794764U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220291619 Withdrawn - After Issue CN202794764U (en) | 2012-06-19 | 2012-06-19 | Backplane of liquid crystal display device |
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| CN (1) | CN202794764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749733A (en) * | 2012-06-19 | 2012-10-24 | 歌尔声学股份有限公司 | Backplate of LCD (Liquid Crystal Display) device and manufacturing method of backplate |
-
2012
- 2012-06-19 CN CN 201220291619 patent/CN202794764U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749733A (en) * | 2012-06-19 | 2012-10-24 | 歌尔声学股份有限公司 | Backplate of LCD (Liquid Crystal Display) device and manufacturing method of backplate |
| CN102749733B (en) * | 2012-06-19 | 2014-12-10 | 歌尔声学股份有限公司 | Backplate of LCD (Liquid Crystal Display) device and manufacturing method of backplate |
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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: 20130313 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |