CN100526948C

CN100526948C - Display device

Info

Publication number: CN100526948C
Application number: CNB2007100841577A
Authority: CN
Inventors: 小野伸一郎
Original assignee: NEC LCD Technologies Ltd
Current assignee: Tianma Japan Ltd
Priority date: 2006-02-17
Filing date: 2007-02-17
Publication date: 2009-08-12
Anticipated expiration: 2027-02-17
Also published as: CN101025503A; JP5333803B2; JP2012163984A; CN101482658B; CN101482658A

Abstract

A LCD device includes a LC panel unit including TFT and counter substrates, and a backlight unit on which the LC panel unit is mounted. The backlight unit has a plurality of positioning ribs protruding from the backlight unit in the vicinity of the corners of the display panel for positioning the display panel. Some of the positioning ribs have a first positioning wall having a height larger than the height of the boundary between the TFT substrate and the counter substrate in a first display area in which the edge of the TFT substrate protrudes from the edge of the counter substrate. Others of the positioning ribs have a second positioning wall having a height lower than the height of the boundary between the TFT substrate and the counter substrate in a second display area in which the edge of the TFT substrate is flush with the edge of the counter substrate.

Description

Display device

Technical field

The present invention relates to a kind of display device, relate in particular to a kind of display device that comprises back light unit and panel unit, this back light unit has the panel unit on the light-emitting area that is formed at the positioning rib on its light-emitting area and is installed on this back light unit, and wherein the position of panel unit is limited by positioning rib.

Background technology

Generally, liquid crystal display (LCD) equipment has by sandwich liquid crystal (LC) structure that panel unit constituted between back light unit and shielding anterior (shield front).Figure 17 is the skeleton view that the observed conventional LCD device structure from the front side is shown.Figure 18 is the decomposition diagram of the LCD equipment of Figure 17.LCD equipment 100 is included in the back light unit 11 that has rectangle light-emitting area 11a on the front side, be installed in light-emitting area 11a goes up and has the LCD panel unit 12 of light switch function and be used to panel unit 12 to limit the shielding front portion 13 of display surface 13a.

LC panel unit 12 comprises display panel 21, (the tape carrier encapsulation) 22 of being coupled to a plurality of TCP of display panel 21 and machinery and electrical couplings be to the circuit board 23 of TCP22.The IC that is used to drive display panel 21 is installed on TCP 22, and circuit board 23 is used to control the control signal of the driving of display panel 21 by TCP 22 outputs.

Display panel 21 comprises LC layer (not shown), join to together at the composition surface place to sandwich the preceding of liquid crystal layer and rear

side transparency carrier

24,25 betwixt and to be arranged on a pair of polarization plates (not shown) on the outer surface of transparency carrier 24,25.Display panel 21 has a plurality of pixels that define in the two-dimensional array mode thereon.Backside substrate 24 constitutes with active-matrix substrate, and the on-off element that is provided with matrix-style such as TFT (thin film transistor (TFT)) etc. have been installed thereon, is used to control the switch of pixel.Thus, below backside substrate 24 is called TFT substrate 24.According to having color filter (CF), and following this front side substrate is called subtend substrate or CF substrate 25 on the front side substrate 25 corresponding to each color of pixel.By via circuit board 23 and TCP 22 drive TFT elements, can be each pixel and control display panel.

TCP 22 and circuit board 23 for example are that two sides adjacent along rectangular display panel 21 are arranged on the outer of display panel 21 and place.On these both sides, when from perpendicular to display panel 21 observation the time, the edge of TFT substrate 24 is outstanding from the edge of subtend substrate 25, and TCP 22 is coupled to the outer peripheral areas of the TFT substrate 24 that exposes from the edge of subtend substrate 25.

Back-side unit 11 provides frame shape backlight chassis 31 on its front side, this backlight chassis 31 has defined the light-emitting area 11a of back light unit 11.On backlight chassis 31, near four turnings of light-emitting area 11a, formed positioning rib, described turning is used to limit the position of display panel 21.Form a pair of positioning rib 42 on each turning of display panel 21, this turning is inserted between a pair of positioning rib 42.Each rib all has the cube shaped of prolongation, and is provided with along the surface of display panel 21.And, consider the variation range of distance between the external dimensions variation range of display panel 21 and the positioning rib 42 each rib to be set, make between the edge of display panel 21 and positioning rib 42, to form 0.2 to 0.3mm space.

Figure 19 A is the plan view from above that the LCD equipment of Figure 18 is shown, and wherein LC panel unit 12 is installed on the back light unit 11, and Figure 19 B is the sectional view that illustrates along the cross section that the line b-b of Figure 19 A obtains.Back light unit 11 for example is an edge-emission type back light unit, and comprises optical sheet 33, optical plate 34 and reflecting plate (not shown) on its light-emitting area 11a continuously.Back light unit 11 comprises lamp or light source (not shown), and two lateral edges of itself and optical plate 34 are adjacent.Near light-emitting area 11a, backlight chassis 31 has Plane Installation surface 35, and TFT substrate 24 has been installed on it, and is more forming groove 36 near the position of light-emitting area 11a than installation surface 35, and this groove 36 can hold polarization plates 26.The edge of display area of label 28 expression display panels 21.

In the assembling process of LCD equipment 100, four turnings of display panel 21 are positioned, so that in the face of display panel 21, on the direction these four turnings are arranged on positioning rib 42 inside, then LC panel unit 12 is installed on the back light unit 11.In this process, TFT substrate 24 is installed on the installation surface 35, polarization plates 26 is accommodated in the groove 36 of backlight chassis.And shielding anterior 13 covers thereon, so that cover back light unit 11 and LC panel unit 12, and will shield front portion 13 and press to the precalculated position downwards, thereby finish assembling.Back light unit 11 and shielding anterior 13 by means of tighten, modes such as calking, the assembling of pawl formula interfix.

Be well known that there is the problem of poor image quality in conventional LCD equipment 100, wherein because dust adhesion can cause the dust shadow falls to be mapped on the display surface 13a to the light-emitting film 11a of back light unit.The picture quality of this difference is owing to following reason.In LCD equipment 100, TFT substrate 24 and subtend substrate 25 constitute by the transparent body, and as being made by glass, and the edge of the transparent body is not polished and have small scrambling, as represented by Reference numeral 101 among Figure 19 B.Therefore, if LCD equipment 100 is vibrated, then the edge with positioning rib 42 contacted transparency carrier bodies grinds with respect to positioning rib, thereby produces dust.This dust by TFT substrate 24 lower surface and the gap between the installation surface 35 of back light unit 11, penetrate in the bottom of display panel 21, and adhere on the light-emitting area 11a of back light unit.

In order to address the above problem, adopt in the positioning rib 42 relative the means that form inclined surface on each the side with display panel 21.Figure 20 is the sectional view that the LCD equipment with inclined surface similar to the Equivalent Surface of Figure 19 B is shown.In this LCD equipment 100, on a side of the display panel 12 relative, form inclined surface 112 with positioning rib 42.

In LCD equipment 100, with location wall 111 and and the edge surface opposing inclined surface 112 of display panel 21 between the height on border be arranged to height less than the top surface of TFT substrate 24.Consequently, when the marginal portion of display panel 21 contacted with positioning rib 42, only a part of edge of TFT substrate 24 contacted with positioning rib 42.Should think,, can suppress to produce because the dust that the friction between display panel 21 and the positioning rib 42 causes by reducing the contact area between display panel 21 and the positioning rib 42.For example in JP-2001-4983A, the LCD equipment that wherein is formed with inclined surface on a side of positioning rib has been described.

The inventor studies, and the ratio of poor picture quality takes place after the LCD equipment 110 of reality manufacturing Figure 20 in investigation, and finds under study for action, suppresses unsatisfactorily because the picture quality of the difference that dust causes.Think that the reason of the picture quality that suppresses the difference that causes owing to dust unsatisfactorily is as follows.

Display panel 21 is by TFT substrate 24 and subtend substrate 25 are joined to together, and liquid crystal layer is clamped into forms therebetween.Therefore, according to the technology degree of accuracy that engages, the position at the position at TFT substrate 24 edges and subtend substrate 25 edges can not be aimed at fully, thereby stays misalignment to a certain degree betwixt.According to the composition surface between TFT substrate 24 and the subtend substrate 25, the edge of subtend substrate 25 is outwards outstanding from the edge of TFT substrate 24.

In the LCD equipment shown in Figure 20, TFT substrate 24 and subtend substrate 25 for example have the thickness of 0.7mm, and consider the change in size scope of positioning rib 42, to be arranged to installation surface 35 about height of 0.5 to 0.6mm on the border between location wall 111 and the inclined surface 112, so that its part does not contact with subtend substrate 25 apart from back light unit.For example with the angle setting of inclined surface 112 into about 10 to 30 °, so that during assembling LCD equipment 110, LC panel unit 12 is installed easily.

The maximal value that for example amounts up to about 0.4mm in the edge and the misalignment between the subtend substrate 25 of TFT substrate 24.Therefore, at subtend substrate 25 largely under the situation of projecting edge, even the angle of inclination is arranged to 30 °, as shown by the numeral 113 among Figure 21, with before positioning rib 42 contacts, the turning of subtend substrate 25 still is adjacent to the inclined surface 112 of positioning rib 42 at TFT substrate 112.Friction between the turning by subtend substrate 24 and the inclined surface 112 of positioning rib has produced the dust that can cause the picture quality of above-mentioned difference.

At this, can conceive following countermeasure: sufficiently increase the angle of inclined surface 112, contact with the inclined surface 112 of positioning rib with the turning that prevents subtend substrate 25.Yet, simulation according to the inventor, suppose that the misalignment between the edge of the edge of TFT substrate 24 and subtend substrate 25 amounts up to the maximal value of 0.4mm, even then the boundary height between location wall 111 and the inclined surface 112 is reduced to from the installation surface 35 of back light unit and is the height of 0.5mm, can not avoid subtend substrate 25 to contact with the inclined surface 112 of positioning rib, unless the angle of inclination is arranged to greater than 68 °, as shown in Figure 22 A.

Yet if the angle of inclined surface 112 is excessive, as shown in Figure 22 B, during assembling LCD equipment 120, the unit 12 of LC panel may stop after laminating positioning rib 42.Therefore, if in this case component parts is attached on the LCD equipment 12 as shielding anterior 13, then scale error may take place, perhaps may be owing to stress damages LC panel unit 12.Especially, in having the LCD equipment of large scale display panel 21, because LC panel unit 12 is heavier, so LC panel unit 12 more may stop on the rib 42.

Summary of the invention

Prevent that in order to realize having the LCD equipment of remarkable picture quality, to it is highly important that LC panel unit 12 from laminating positioning rib 42 and also suppressing because the generation of the dust due to the grinding that the friction between LC panel unit 12 and the positioning rib 42 causes.

Consider above-mentioned aspect, the purpose of this invention is to provide a kind of display device, it can prevent that panel unit from laminating positioning rib and also suppressing because the generation of the dust that the friction between panel unit and the positioning rib causes.

In a first aspect of the present invention, the invention provides a kind of display device, comprising:

Display panel, comprise first and second substrates, being laminated on the installation surface and at the composition surface place that it is continuous joins to together, this display panel has first faceplate part and second faceplate part, the edge of first substrate is outstanding from the edge of second substrate in first faceplate part, and the edge of first substrate flushes with second substrate edges basically in second faceplate part; With the positioning rib group, it is outstanding from installation surface, on installation surface, to limit the position of display panel, this positioning rib group comprises first rib and second rib, this first rib has the relative and height in edge with first faceplate part greater than the first location wall from the height of the composition surface of installation surface observation, and this second rib has relative and the height in edge with second faceplate part less than locating wall from second of the height of the composition surface of installation surface observation.

In a second aspect of the present invention, the invention provides a kind of display device, comprise: display panel, it comprises that successive layers is stacked on the installation surface and joins together first and second substrates at the composition surface place to, this display panel has first faceplate part and second faceplate part, the edge of first substrate is outstanding from the edge of second substrate in first faceplate part, and the edge of first substrate flushes with the edge of second substrate basically in second faceplate part; With the positioning rib group, it is outstanding from installation surface, on installation surface, to limit the position of display panel, this positioning rib group comprises first rib and second rib, this first rib has the relative and height in edge with first faceplate part greater than the first location wall from the height of the composition surface of installation surface observation, this second rib has the relative and height in edge with second faceplate part less than the second location wall from the height of the composition surface of installation surface observation, but this second rib also has at the height place that is lower than the composition surface height from the indentation wall of the second location wall indentation.

In a third aspect of the present invention, the invention provides a kind of display device, it comprises: display panel, it is installed on the installation surface; And positioning rib, it is outstanding from installation surface, and limiting the position of display panel on installation surface, positioning rib extends along at least a portion edge of display panel and comprises towards the outstanding a plurality of projectioies in the edge of display unit.Described projection can have circular surface or band edge shape surface.

In a fourth aspect of the present invention, the invention provides a kind of display device, this display device comprises: display panel, first and second substrates that it is included on the installation surface continuously lamination and is bonded together at the composition surface place; And

From the outstanding positioning rib projection of installation surface, be used on installation surface, limiting the position of display panel, at least a portion of described positioning rib has the location wall relative with the edge of display panel, and the groove that forms on the wall of location, height is contiguous with composition surface.

For example, according to the display device of the present invention of first aspect, first first faceplate part of locating wall inhibition display panel with first rib of the height that is higher than composition surface is laminated on the first rib.The second location wall with second rib of the height that is lower than mating surface only allows the part of display panel near second rib.Therefore, the present invention has reduced the contact area between display panel and rib assembly, thus suppressed since with the generation of the dust that friction or wearing and tearing caused of display panel.

According to of the present invention second display device to fourth aspect, the positioning rib group that forms on display device provides the advantage similar to the advantage of a first aspect of the present invention.

In the present invention, this positioning rib group can integrally form with installation surface, perhaps also can be formed separately with installation surface.Installation surface can dispose back light unit or other installation units.

To become more obvious according to reference to the accompanying drawings following description above and other objects of the present invention, feature and advantage.

Description of drawings

Fig. 1 is the decomposition diagram that illustrates according to the LCD equipment of first embodiment of the invention;

Fig. 2 is the top plan view of the state on the back light unit that illustrates in the LCD equipment that wherein the LC panel unit is installed in Fig. 1;

Fig. 3 A and 3B are the sectional views obtained of the line a-a in Fig. 2 and b-b respectively;

Fig. 4 A be illustrate among Fig. 2 dotted line IV around the amplification top plan view of part;

Fig. 4 B is the sectional view that the line a-a along Fig. 4 A obtains;

Fig. 5 be illustrate by the dotted line V among Fig. 1 around the amplification perspective illustration of part;

Fig. 6 is the skeleton view that similar to Fig. 5 LCD device structure according to first embodiment, first improvement project is shown;

Fig. 7 is the skeleton view that similar to Fig. 5 LCD device structure according to first embodiment, second improvement project is shown;

Fig. 8 is the skeleton view that similar to Fig. 5 LCD device structure according to first embodiment the 3rd improvement project is shown;

Fig. 9 is the skeleton view that similar to Fig. 5 LCD device structure according to first embodiment the 4th improvement project is shown;

Figure 10 is the top plan view that similar to Fig. 2 LCD device structure according to first embodiment the 5th improvement project is shown;

Figure 11 is the top plan view that illustrates according to the LCD device structure of first embodiment the 6th improvement project;

Figure 12 is the top plan view that the LCD device structure of similar to Fig. 2 the 7th improvement project according to first embodiment is shown, and is similar to Fig. 2;

Figure 13 A is the skeleton view that similar to Fig. 5 LCD device structure according to second embodiment of the invention is shown;

Figure 13 B is the sectional view that the line b-b along Figure 13 A obtains;

Figure 14 is the top plan view that similar to Fig. 4 LCD device structure according to fourth embodiment of the invention is shown;

Figure 15 is the top plan view that similar to Figure 14 LCD device structure according to the 4th embodiment first improvement project is shown;

Figure 16 is the top plan view that similar to Figure 14 LCD device structure according to the 4th embodiment second improvement project is shown;

Figure 17 is the skeleton view that conventional LCD device structure is shown;

Figure 18 is the decomposition diagram that the LCD equipment of Figure 17 is shown;

Figure 19 A is the top plan view under the situation on the back light unit that illustrates in the LCD equipment that wherein the LC panel unit is installed among Figure 17;

Figure 19 B is the sectional view that the line b-b along Figure 19 A obtains;

Figure 20 is the sectional view that another conventional LCD device structure is shown;

Figure 21 is the sectional view that the LCD plant issue of Figure 20 is shown;

Figure 22 A is the sectional view that the LCD device structure with inclined surface is shown, and the angle of inclination of this inclined surface is different with the angle of inclination of the inclined surface of the LCD equipment of Figure 20; With

Figure 22 B is the sectional view that the LCD plant issue of Figure 22 A is shown.

Figure 23 A is the skeleton view of the LCD equipment of a third embodiment in accordance with the invention, and Figure 23 B is the sectional view that the line b-b in Figure 23 A obtains.

Embodiment

Now, will with reference to the accompanying drawings and based on embodiments of the invention the present invention be described in further detail.In the accompanying drawings, represent similar composed component with similar Reference numeral all the time.Fig. 1 is the decomposition diagram according to the LCD equipment of first embodiment of the invention.General have the structure similar to the conventional LCD equipment 100 shown in Figure 17 to 19 with the numeral 10 LCD equipment of representing, but on back light unit 11 shape of the positioning rib of formation.

In display panel 21, on two sides adjacent of the rectangular display panel 21 that is connected with TCP 22, the TFT substrate 24 that demonstrates as the bottom surface side of display panel unit 12 has the outstanding edge, edge of subtend substrate 25, and this subtend substrate 25 demonstrates as the top surface side of display panel unit 12.On display unit 12 remaining two sides adjacent, TFT substrate 24 has the edge of aiming at the edge of subtend substrate.In other words, the edge of display panel 12 comprises the first marginal portion 21a and the second marginal portion 21b, wherein in the described first marginal portion 21a, the edge of TFT substrate 24 is outstanding from subtend substrate 25 respective edges, and in the described second marginal portion 21b, the edge of TFT substrate 24 flushes with the respective edges of subtend substrate 25 basically.

In the embodiment of the invention, the positioning rib group 32 that is used for that display panel 21 is positioned comprises the positioning rib of first to the 3rd type, wherein the rib 32a of the first kind has first height, the rib 32b of second type has second height less than first height, and the rib 32c of the 3rd type comprises the part with first height and has another part of second height.Just as will be described below, this first highly is definite according to the first marginal portion 21a (that is, the edge of first panel), and second highly is definite according to second portion 21b (that is the edge of second faceplate part).

Fig. 2 shows the details of the LCD equipment 10 of Fig. 1, and wherein the LCD panel unit 12 shown in Fig. 1 is installed on the back light unit 11 within the space that is limited by positioning

rib

32a, 32b, 32c.First kind rib 32a is provided with along the side of the display panel 21 that is connected with TCP 22 and has first height, the second type rib 32b is provided with along the side of the display panel 21 that is not connected with TCP 22 and has second height, and the 3rd type rib 32c is provided with along the side of the display panel 21 that is not connected with TCP 22 and comprises the C1 of first with first height and have second highly the second portion C2.The 3rd type rib 32c is arranged on the boundary between the first marginal portion 21a and the second marginal portion 21b, and the C1 of first is corresponding to the first marginal portion 21a, and second portion C2 is corresponding to the second marginal portion 21b.

Fig. 3 A and 3B are the sectional views of obtaining along the line a-a shown in Fig. 2 and b-b respectively.First kind rib 32a shown in Fig. 3 A has location wall 37, the height of this location wall 37 be substantially equal to subtend substrate 25 top surface (outer surface) height or equal the thickness of display panel unit 12.The second type rib 32b shown in Fig. 3 B has location wall 37, and the height of the top surface (inside surface) of the aspect ratio TFT substrate 24 of this location wall 37 is low or littler than the thickness of TFT substrate 24.TFT substrate 24 and subtend substrate 25 for example have the thickness of 0.7mm, and

polarization plates

26,27 for example has the thickness of 0.2mm.In Fig. 3 A, first kind rib 32a has the height H of 1.6mm ₁, and in Fig. 3 B, the rib 32b of second type for example has the height H of 0.6mm ₂

Fig. 4 A be illustrate by the dotted line IV among Fig. 2 around the amplification top plan view, and Fig. 4 B is the sectional view of obtaining along the line a-a shown in Fig. 4 A.Similar along the cross section that the line b-b shown in Fig. 3 A obtains to the cross section shown in Fig. 3 B.Fig. 5 be illustrate by the dotted line V among Fig. 1 around the enlarged diagram of part.In the present embodiment, by using the mold technology that

positioning rib

32a, 32b, 32c are integrally formed on the backlight chassis 31; Yet, also can form each positioning rib by the mode that after forming this fin, this fin is attached to backlight chassis 31.

In LCD equipment 10, as shown in Fig. 3 A and Fig. 4 B, the C1 of first of first kind rib 32a and the 3rd type rib 32c has the essentially identical height of height with the top surface of subtend substrate 25.Prevent that by providing display panel 21 from laminating the required enough big step difference of first kind rib 32a, can avoid display panel 21 to be laminated on the first kind rib 32a.In Fig. 2, can avoid display panel 21 with respect to laminating on X-direction or the Y direction by being arranged on first kind positioning rib 32a on the first marginal portion 12a, and can avoid its laminating on X-direction and Y direction by the C1 of first that is arranged on the 3rd type positioning rib 23c on the first marginal portion 12a.

In LCD equipment 10, the first marginal portion 21a of panel unit 12 that only comprises TFT substrate 24 is relatively or adjacent to the C1 of first of first kind rib 32a and the 3rd type rib 32c.And, as shown in Fig. 3 B, because the second type rib 32B is arranged to be lower than slightly the top surface of TFT substrate 24, so the second marginal portion 21b of panel unit 12, with the second type rib 32b with only the second portion C2 at the 3rd type rib 232c at TFT substrate 24 places is adjacent.This has reduced the marginal portion of display panel 21 and the contact area between the positioning rib 32.

According to the LCD equipment 10 of present embodiment since the height of first kind rib 32a and the first of the 3rd type rib 32c the height with the top surface of subtend substrate 25 is identical basically, therefore, can avoid display panel 21 to be laminated on the first kind rib 32a.And, because the height of the second type rib 32b is lower than the height of the top surface of TFT substrate 24 slightly, therefore, can be reduced in the edge of display panel 21 and the contact area between the positioning rib 32b, thereby suppress owing between display panel 21 and positioning rib 32, produce the dust generation that friction causes.

Although the height of first kind rib 32a is substantially equal to the top surface height of subtend substrate 25, so the first marginal portion 21a of panel unit 12 is only adjacent with first kind rib 32a at TFT substrate 24 places.This has reduced the marginal portion of display panel 21 and the contact area between the positioning rib 32, thereby has suppressed because the generation of the dust that the friction between display panel 21 and the positioning rib 32 causes.That is, can avoid display panel 21 to be laminated on the positioning rib 32 and produce by the dust that the marginal portion and the friction between the positioning rib 32 of display panel 21 causes.

Fig. 6 is the skeleton view that the LCD device structure of similar to Fig. 5 first improvement project according to first embodiment is shown.In generally with the numeral 51 LCD equipment of representing, the C1 of first of first kind rib 32a and the 3rd type rib 32c has the relative circular edge of the first marginal portion 21a with display panel 21.The circular edge of this first kind rib 32a and the C1 of first of the 3rd type rib 32c have suppressed display panel 21 effectively and have been laminated on first kind rib 32a or the 3rd type rib 32c.And the second portion C2 of the second type rib 32b and the 3rd type rib 32c has the edge surface 62 of inclination, and its second marginal portion 21b with display panel 21 is relative, and extends from location wall 37.

In the LCD of first improvement project equipment 51, the second portion C2 of the circular edge of first kind rib 32a and the beveled edge surfaces 62 of the second type rib and the 3rd type rib 32c makes the packaging technology of LCD equipment easily LC panel unit 12 to be installed on the back light unit 11.

The 3rd type rib 32c has the C1 of first, and in this improvement project, C1 of this first and second portion C2 integrally form; Yet the C1 of this first also can form discretely with second portion C2.Fig. 7 is the skeleton view that the LCD device structure of similar to Fig. 5 second improvement project according to first embodiment is shown.Different with the LCD equipment 51 shown in Fig. 6, in the LCD equipment of generally being represented by numeral 52, C1 of first and the second portion C2 of the 3rd type rib 32c form with being separated from each other.Except having than small area of contact between the marginal portion of display panel 21 and the positioning rib 32, the LC panel unit 12 that has reduced size and have light relatively weight has thus further suppressed the dust generation.

And first marginal portion 21a of panel unit 12 and the border adjacent between the second marginal portion 21b, can only provide C1 of first or first kind rib 32a for panel unit 12.Fig. 8 is the skeleton view that the LCD device structure of similar to Fig. 5 the 3rd improvement project according to first embodiment is shown.In the LCD equipment of generally representing, omitted the second portion C2 of the 3rd type rib 32c in the LCD equipment 51 shown in Fig. 6, and thus, in the 3rd improvement project, only provide C1 of first or first kind rib 32a by numeral 53.If LC panel unit 12 has small size and relative light weight, then marginal portion and the contact area between the positioning rib 32 at display panel 21 is little, and has further suppressed the generation of dust thus.

Fig. 9 is the skeleton view that the LCD device structure of similar to Fig. 5 the 4th improvement project according to first embodiment is shown.In general LCD equipment, except the structure shown in Fig. 6, also form the wall surface 64 parallel, with 62 extensions of the beveled edge surfaces from the second portion C2 of the 3rd type rib 32c with location wall 37 by numeral 54 expressions.And, be adjacent to form flat surfaces 65 with wall surface 64.Flat surfaces 65 is configured the top surface as portion C 2, and the top of the top of the C1 of first and second portion C2 flushes in the 3rd type rib 32c mutually.

In the LCD of the 4th improvement project equipment 54, the wall surface 64 that forms in second portion C2 makes the packaging technology of LCD equipment LC panel unit 12 can be easily mounted on the back light unit 11.

In first embodiment and first to fourth improvement project thereof, show near the example that wherein positioning rib 32 is arranged on display panel 21 turnings.Yet the position of positioning rib 32 is not limited to those in the top structure.

Figure 10 to 12 be illustrate similar to Fig. 2 respectively according to the top plan view of the LCD device structure of the 5th to the 7th improvement project of first embodiment.In the LCD of Figure 10 equipment 55, each turning formation turning rib 32d for display panel 21, wherein rib 32d in turning comprises the first kind rib 32a and the second type rib 32b that integrally forms mutually, to form L shaped turning, perhaps it only comprises the first kind rib 32a or the second type rib 32b that has with the corresponding L shaped bending in the turning of display panel 21.Provide first kind rib 32a accordingly with the first marginal portion 21a, provide the second type rib 32b accordingly with the second marginal portion 21b of panel unit 12.

In the LCD equipment 56 shown in Figure 11, except this part that TCP 22 and circuit board 23 wherein are installed of the first marginal portion 21a, straight positioning rib 32e extends in all the other sides along display panel 21.Each straight positioning rib 32e comprises the first kind rib 32a and the second type rib 32b that is integrally formed in mutually together.

In the LCD equipment 57 shown in Figure 12, the positioning rib 32f of single prolongation comprises the second type rib 32b that extends along the second marginal portion 21b and integrally forms and be arranged on a pair of first kind rib 32a on the first marginal portion 21a with the end of the second type rib 32b.Other first kind positioning rib 32a is set on the turning with the first marginal portion 21a corresponding display panel 21.

In those LCD equipment 55 to 57 shown in Figure 10 to 12, similar to the situation of the LCD equipment 10 of first embodiment, first kind rib 32a in turning rib 32d, straight rib 32e and single prolongation rib 32f has first height of the top surface height that equals subtend substrate 25, and the second type rib 32b has second height of the height of the top surface that is slightly smaller than TFT substrate 24.

Figure 13 A is the skeleton view that similar to Fig. 5 LCD device structure according to second embodiment of the invention is shown.Figure 13 B is the sectional view of obtaining along the line b-b shown in Figure 13 A.In general LCD equipment by numeral 70 expressions, the second type rib 32b has the location wall 71 relative with the edge surface of subtend substrate 25, and the indentation wall 72 of formation between the bottom of the second type rib 32b and location wall 71.This indentation wall 72 is parallel to location wall 71 and is formed at from the position of location wall 71 indentations with respect to display panel 21.

When observing, be configured to fully greater than between the edge surface of the edge surface of TFT substrate 24 and subtend substrate 25, estimating the misalignment scope in the distance between the surface of the surface of location wall 71 and indentation wall 72 perpendicular to display panel 21.The second type positioning rib 32b only is formed in the part relative with the second marginal portion 21b of display panel 21.Being arranged to the basal surface of location wall 71 higher than the border between TFT substrate 24 and the subtend substrate 25, for example be 0.9mm, and the top surface of the second type rib 32b for example has the height of 1.6mm.

The top interior of the positioning rib 32 relative with display panel 21 partly has circular edge.In the LCD of present embodiment equipment 70, because only part subtend substrate 25 is adjacent with positioning rib 32 at 21b place, display panel 21 second marginal portion, therefore, contact area between display panel 21 and positioning rib 32 is little, to reduce the dust that forms by grinding, similar to the situation of first embodiment.

Similar to Fig. 5, Figure 23 A shows that in the mode of skeleton view the LCD equipment of a third embodiment in accordance with the invention, Figure 23 B demonstrate the sectional view that the line b-b in Figure 23 A obtains.Generally similar to the LCD equipment 10 among Fig. 5 with the numeral 74 LCD equipment of representing, but except the second type positioning rib 32b in the present embodiment comprises the second relative location wall 71 of the second outer edge part 21b with display panel 21, and the groove 75 of the height formation that on the wall 71 of location, at the composition surface and the second location wall 71 of display panel 21, intersects.Only the second outer edge part 21b with display panel 21 is relative with in the second type positioning rib of the adjacent setting of first kind location wall 32b one.In the present embodiment, the bottom of groove 75 constitutes the indentation wall of the second type positioning rib 32b.

Groove 75 equals the height of the composition surface between TFT substrate 24 and subtend substrate 25 substantially with respect to the centre-height of installation surface 35, for example can be 0.7mm.Groove 75 can have the width of 0.4mm and 0.3 to 0.5mm the degree of depth, and the top surface of the second type positioning rib 32b for example is the 1.6mm height.

In an improvement project of the LCD of present embodiment equipment 74, the edge of the TFT substrate 24 of the edge of subtend substrate 25 from the second outer edge part 21b of display panel 21 is outstanding, and only the part of subtend substrate 25 contacts with the second location wall 71 in the place that is higher than groove.In another improvement project of the LCD of present embodiment equipment 74, the edge of TFT substrate 24 is outstanding from the edge of the subtend substrate 25 among the second outer edge part 21b, and the part of TFT substrate 24 contacts with the second location wall 71 in the position that is lower than groove 75.In these two kinds of improvement projects, to compare with conventional display panels, the contact area between the second type positioning rib 32b and the display panel 21 has all reduced, and has reduced the amount of dust that friction causes thus, and the situation among this and second embodiment is similar.

In another improvement project of LCD equipment 74, first kind positioning rib 32a can have the groove similar to the groove that forms 75 on the second type positioning rib 32b.

Can adjust contact area by position and the width of adjusting groove 75.In addition, in any situation during edge outstanding at the edge of TFT substrate and the subtend substrate is outstanding,, display panel 21 is all located by the second location wall 71.Therefore, these improvement projects are particularly suitable for the situation based on the outline location of display panel.Although the groove 75 shown in Figure 23 B has the square-section, the cross section of this groove can have V-type, U type, semicircle and other shapes.

Figure 14 is the top plan view that similar to Fig. 4 LCD device structure according to fourth embodiment of the invention is shown.Generally have the structure similar, except in the present embodiment in the shape of the positioning rib 32 that forms on the back light unit 11 to the conventional LCD equipment 10 shown in Figure 17 to 19 by the LCD equipment of numeral 80 expressions.In LCD equipment 80, positioning rib 32 have perpendicular to display panel 21 extend round-shaped.

The height of positioning rib 32 equals the height of the top surface of subtend substrate 25 substantially.Similar along cross section that the line a-a shown in Figure 14 obtains to shown in Fig. 3 A, and along cross section that line e-e obtains similar to shown in Figure 19 B.

LCD equipment 80 according to present embodiment, have the round-shaped positioning rib 32 that extends perpendicular to display panel 21 and reduced contact area between display panel 21 and positioning rib 32, thereby suppressed because the dust that grinding between display panel 21 and positioning rib 32 or friction cause produces.And, by being provided for avoiding display panel 21 to laminate the required enough big step difference of first kind rib 32a, the top surface of the positioning rib 32 that it equates with the top surface height of subtend substrate 25 has highly basically avoided display panel 21 to laminate first kind rib 32a.

Figure 15 is the top plan view that similar to Figure 14 LCD device structure according to the 4th embodiment first improvement project is shown.In the LCD equipment of generally being represented by numeral 81, each positioning rib 32 all has a plurality of projectioies, and its edge surface towards display panel 21 is outstanding.When perpendicular to display panel 21 observations, projection 91 has semi-circular shape, and it is provided with a regular pitch along the edge of display panel 21.

Positioning rib 32 has consistent shape along the direction perpendicular to display panel 21, and it highly is substantially equal to subtend substrate 25 top surface height.Similar along cross section that the line a-a shown in Figure 15 obtains to shown in Fig. 3 A, and along cross section that line e-e obtains similar to shown in Figure 19 B.In this improved LCD equipment, compare with the LCD equipment 80 of the 3rd embodiment, by by edge surface, improved the reliability of positioning rib 32, and can obviously not increase contact area basically with a plurality of protruding 91 positioning ribs 32 support display panels 21.

Figure 16 is the top plan view that similar to Figure 14 LCD device structure according to the 4th embodiment second improvement project is shown.In general LDC equipment by numeral 82 expressions, the projection 91 that is provided in the LCD equipment 81 of Figure 15 is modified to the V-type shape that has among Figure 16.In the LCD of this modification equipment 82, can obtain to the first improved LCD equipment 81 in those similar advantages.

And identical with the situation of first embodiment in the LCD equipment 80 to 82 shown in Figure 14 to 16, the positioning rib 32 relative with the second marginal portion 21b of display panel 21 has location wall 37, and it is lower than the top surface height of TFT substrate 24 highly slightly.In alternative, can provide the location wall 71 relative, as the situation of second embodiment with the edge surface of subtend substrate 25.This structure makes to have less contact area between display panel 21 and positioning rib 32, thereby suppresses the generation of dust.

As mentioned above, the present invention is described based on its preferred embodiment.Yet display device according to the present invention is not limited to the foregoing description, and the display device that various improvement and alternative is applied to it in the structure of the foregoing description will fall within the scope of the present invention.For example, display device of the present invention is not limited to LCD equipment, and it is applicable to any display device with installation surface and positioning rib.

Claims

1. a display device comprises

Display panel, comprise first and second substrates, being laminated on the installation surface and at the composition surface place that it is continuous joins to together, described display panel has first faceplate part and second faceplate part, wherein outstanding from the edge of described second substrate at the edge of first substrate described in described first faceplate part, in described second faceplate part, the edge of described first substrate flushes with described second substrate edges basically; With

The positioning rib group, it is outstanding from described installation surface, on described installation surface, to limit the position of described display panel, described positioning rib group comprises first rib and second rib, this first rib has the relative and height in edge with first faceplate part greater than the first location wall from the described composition surface height of installation surface observation, and this second rib has relative and the height in edge with described second faceplate part less than locating wall from second of the composition surface height of described installation surface observation.

2. display device as claimed in claim 1, wherein said display panel has rectangular shape, and one of the side that constitutes the described display panel of described first and second faceplate parts simultaneously is associated with at least one described first rib and at least one described second rib.

3. display device as claimed in claim 1, wherein said first substrate is an active-matrix substrate, and at least one tape carrier encapsulates the zone that (TCP) is coupled to described first substrate in described first faceplate part of described display board.

4. display device as claimed in claim 1, wherein said display panel has rectangular shape, each turning of described display panel is associated with described first rib and/or described second rib, described first rib and/or described second rib are to be formed separately with the described first rib and/or the second rib that are associated with another turning, and at least one turning of described display panel is associated with described first and second ribs of formation separated from one another.

5. display device as claimed in claim 1, wherein said display panel has rectangular shape, each turning of described display panel is associated with described first rib and/or described second rib, described first rib and/or described second rib are to be formed separately with the described first rib and/or the second rib that are associated with another turning, and at least one turning of described display panel is associated with described first and second ribs of integrating formation each other.

6. display device as claimed in claim 4, wherein in the turning except described at least one turning of described display panel is associated with described first and second ribs of formation separated from one another.

7. display device as claimed in claim 1, wherein said display panel has rectangular shape, and at least one side of described display panel is associated with described second rib.

8. display device as claimed in claim 1, wherein said second rib have the angled top surface that begins to extend from the described second location wall.

9. display device as claimed in claim 1, wherein said second rib have the planar top surface that begins to extend from the described second location wall.

10. display device comprises:

Display panel, it comprises that successive layers is stacked on the installation surface and joins together first and second substrates at the composition surface place to, described display panel has first faceplate part and second faceplate part, wherein in described first faceplate part, the edge of described first substrate is outstanding from the edge of described second substrate, and in described second faceplate part, the edge of described first substrate flushes with the edge of described second substrate basically; With

From the outstanding positioning rib group of installation surface, be used on described installation surface, limiting the position of described display panel, described positioning rib group comprises first rib and second rib, this first rib has the relative and height in edge with described first faceplate part greater than the first location wall from the composition surface height of installation surface observation, this second rib has the relative and height in edge with described second faceplate part greater than the second location wall from the described composition surface height of described installation surface observation, and this second rib also has with respect to the described edge of described second faceplate part indentation wall from the described second location wall indentation.

11. as the display device of claim 10, wherein said indentation wall is the lower surface of the groove that forms on the described second location wall, at the height place that described composition surface and the described second location wall intersect.

12. a display device comprises:

Display panel is included in continuous stacked and first and second substrates that be bonded together on the installation surface on composition surface; And

From the outstanding positioning rib of described installation surface, be used on described installation surface, limiting the position of described display panel, at least a portion of described positioning rib has the location wall relative with the edge of described display panel, the groove that also has on the wall of described location, forms at the height close with described composition surface.