TWI755982B - Tunable light projector and light control element - Google Patents

Abstract

A light control element includes a first substrate, a first electrode, a first liquid crystal layer, a second electrode, a second substrate, a first internal conductive object, a first intermediate conductive object and a second internal conductive object. A peripheral area of the second substrate has a first through hole. The first internal conductive object is disposed in a first through hole of the second substrate. The first intermediate conductive object is disposed between the peripheral area of the second substrate and the first substrate, and is electrically connected to the first electrode and the first internal conductive object. The peripheral area of the second substrate further has a second through hole. The second internal conductive object is disposed in the second through hole of the second substrate and is electrically connected to the second electrode.

Description

Adjustable light projection device and light control element

The present disclosure relates to an adjustable light projection device and a light control element.

The adjustable light projection device integrated in the mobile device is used to generate patterned light, such as structured light or flood light, by means of light control elements. The pattern light projected by the adjustable light projection device can be used for face recognition or simultaneous localization and mapping (SLAM) through stereo image matching. In the conventional method, the upper substrate of the light control element and the lower substrate of the light control element are displaced or offset to expose a bonding area for electrically connecting with the external driving element. The bonding area makes it difficult to reduce the overall area of the light control element.

The present disclosure provides a light control element with a small area.

The present disclosure provides an adjustable light projection device including a light control element with a small area.

A light control element of the present disclosure includes a first substrate, a first electrode, a first liquid crystal layer, a second electrode, a second substrate, a first inner conductor, a first intermediate conductor and a second inner conductor. The first substrate, the first electrode, the first liquid crystal layer, the second electrode and the second substrate are arranged in sequence along one direction. The second substrate has a peripheral region outside the area of the first liquid crystal layer. A peripheral area of the second substrate has a first through hole, and the first through hole is staggered from the second electrode. The first inner conductor is disposed in the first through hole of the second substrate. The first intermediate conductor is disposed between the peripheral region of the second substrate and the first substrate, and is electrically connected to the first electrode and the first inner conductor. The peripheral region of the second substrate further has a second through hole. The second inner conductor is disposed in the second through hole of the second substrate and is electrically connected to the second electrode.

An adjustable light projection device of the present disclosure includes a light source and the above-mentioned light control element. The light source is used to emit light beams. The light control element is arranged on the transmission path of the light beam.

10, 10A, 10B, 10C: light control element

20: Light source

110: The first substrate

120: The first electrode

121, 141, 221, 241: Main Department

122, 142, 222, 242: connecting part

130: the first liquid crystal layer

140: Second electrode

142a, 161, 261: Opening part

150: Second substrate

150b, 250b: Surrounding area

150s, 250s: outer surface

151: The first through hole

152: Second through hole

160: The first frame glue

160e, 260e: Outer profile

171: The first intermediate conductor

171-1, 171’-1, 277-1, 280-1: Part 1

171-2, 171'-2, 277-2, 280-2: Part II

171a, 171'a, 277a, 280a: through holes

171', 284: auxiliary conductor

172: The first internal conductor

173: The first external conductor

174: Second internal conductor

175: Second external conductor

210: Third substrate

211: Fifth through hole

212: Seventh through hole

220: Third electrode

230: the second liquid crystal layer

240: Fourth electrode

250: Fourth substrate

254: Eighth through hole

251: The third through hole

252: Fourth through hole

253: sixth through hole

260: Second frame glue

271: Second Intermediate Conductor

272: Third internal conductor

273: Third external conductor

274: Fourth Internal Conductor

275: Fourth external conductor

276: Fifth Internal Conductor

277: Third Intermediate Conductor

278: Sixth Internal Conductor

279: Seventh Internal Conductor

280: Fourth Intermediate Conductor

281: Eighth Internal Conductor

282: Second external conductor

283: The first external conductor

310: First Insert Pattern

320: Second Insert Pattern

C1: The first liquid crystal cell

C2: The second liquid crystal cell

LP: Adjustable light projection device

L: Beam

R: region

z: direction

I-I', II-II', III-III', IV-IVI', V-V': cross-section

FIG. 1 is a schematic diagram of an adjustable light projection device LP according to an embodiment of the disclosure.

FIG. 2 is a schematic perspective view of the light control device 10 according to an embodiment of the disclosure.

FIG. 3 is a schematic top view of the light control device 10 according to an embodiment of the disclosure.

FIG. 4 is a schematic cross-sectional view of the light control device 10 according to an embodiment of the disclosure.

FIG. 5 is a schematic cross-sectional view of the light control device 10 according to an embodiment of the disclosure.

FIG. 6 is a schematic perspective view of a light control device 10A according to an embodiment of the disclosure.

FIG. 7 is a schematic top view of a light control device 10A according to an embodiment of the disclosure.

FIG. 8 is a schematic cross-sectional view of a light control device 10A according to an embodiment of the disclosure.

FIG. 9 is a schematic cross-sectional view of a light control device 10A according to an embodiment of the disclosure.

FIG. 10 is a schematic top view of a light control device 10B according to an embodiment of the disclosure.

FIG. 11 is a schematic cross-sectional view of a light control device 10B according to an embodiment of the disclosure.

FIG. 12 is a schematic cross-sectional view of a light control device 10C according to an embodiment of the disclosure.

FIG. 13 is a schematic perspective view of a part of the light control device 10C according to an embodiment of the disclosure.

Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals are used in the drawings and description to refer to the same or like parts.

FIG. 1 is a schematic diagram of an adjustable light projection device LP according to an embodiment of the disclosure.

Referring to FIG. 1 , the adjustable light projection device LP includes a light control element 10 and a light source 20 . The light source 20 is used for emitting the light beam L. The light control element 10 is arranged on the transmission path of the light beam L. The light control element 10 is used to control the light shape of the light beam L. For example, in this embodiment, the light source 20 may be a vertical-cavity surface-emitting laser (VCSEL), but the disclosure is not limited thereto.

FIG. 2 is a schematic perspective view of the light control device 10 according to an embodiment of the disclosure. picture 2. The illustration of the first sealant 160 is omitted.

FIG. 3 is a schematic top view of the light control device 10 according to an embodiment of the disclosure.

FIG. 4 is a schematic cross-sectional view of the light control device 10 according to an embodiment of the disclosure. Fig. 4 corresponds to the section line I-I' of Fig. 3 .

FIG. 5 is a schematic cross-sectional view of the light control device 10 according to an embodiment of the disclosure. Fig. 5 corresponds to line II-II' of Fig. 3 .

Referring to FIGS. 2 to 5 , the light control element 10 includes a first liquid crystal cell C1 . The first liquid crystal cell C1 includes a first substrate 110 , a first electrode 120 , a first liquid crystal layer 130 , a second electrode 140 and a second substrate 150 arranged in sequence along the direction z. The first liquid crystal cell C1 further includes a first sealant 160 . The first sealant 160 is disposed between the first substrate 110 and the second substrate 150 and surrounds the first liquid crystal layer 130 .

The first electrode 120 is disposed on the first substrate 110 and located between the first liquid crystal layer 130 and the first substrate 110 . In this embodiment, the first electrode 120 has a main portion 121 and a connecting portion 122 , the main portion 121 of the first electrode 120 overlaps the first liquid crystal layer 130 , and the connecting portion 122 of the first electrode 120 is located in the first liquid crystal layer 130 outside the area.

The second electrode 140 is disposed on the second substrate 150 and located between the second substrate 150 and the first liquid crystal layer 130 . In this embodiment, the second electrode 140 has a main portion 141 and a connecting portion 142 , the main portion 141 of the second electrode 140 overlaps the first liquid crystal layer 130 , and the connecting portion 142 of the second electrode 140 is located on the first liquid crystal layer 130 . outside the area, and the connecting portion 122 of the first electrode 120 and the connecting portion 142 of the second electrode 140 are staggered.

In this embodiment, the first substrate 110 and the second substrate 150 can be selectively transparent substrates; the material of the first substrate 110 is, for example, glass, quartz, organic polymer or other suitable materials; the material of the second substrate 150 For example, glass, quartz, organic polymers or other suitable materials; but the present disclosure is not limited thereto.

In this embodiment, the first electrode 120 and the second electrode 140 can be selectively transparent conductive layers; the material of the first electrode 120 is, for example, indium tin oxide (ITO), antimony tin oxide (antimony tin) oxide; ATO) or other materials; the material of the second electrode 140 is, for example, indium tin oxide (ITO), antimony tin oxide (ATO) or other materials; but the disclosure is not limited thereto.

The second substrate 150 has a peripheral region 150b outside the area of the first liquid crystal layer 130 . The first sealant 160 is disposed between the first substrate 110 and the peripheral region 150 b of the second substrate 150 . The peripheral region 150b of the second substrate 150 has a first through hole 151 . The first through hole 151 is staggered from the second electrode 140 . The first through hole 151 of the second substrate 150 does not overlap with the connecting portion 142 of the second electrode 140 . The first through hole 151 of the second substrate 150 overlaps the connecting portion 122 of the first electrode 120 .

The first liquid crystal cell C1 further includes a first inner conductor 172 disposed in the first through hole 151 of the second substrate 150 . For example, in this embodiment, the first inner conductor 172 may be a conductive glue (such as but not limited to: silver glue). However, the present disclosure is not limited to this. In other embodiments, the first internal conductor 172 may also be a conductor (such as but not limited to: copper pillar or copper layer) pre-formed in the first through hole 151 . .

The first liquid crystal cell C1 further includes a first intermediate conductor 171 disposed between the peripheral region 150b of the second substrate 150 and the first substrate 110 and electrically connected to the first electrode 120 and the first inner conductor 172 . For example, in this embodiment, the first intermediate conductors 171 may be conductive pillars (eg, but not limited to, gold pillars) or conductive balls (eg, but not limited to, nickel balls). However, the present disclosure is not limited thereto, and in other embodiments, the first intermediate conductor 171 may also be a conductive glue (eg, but not limited to: silver glue), or a combination of conductive pillars and conductive glue.

The second substrate 150 has an outer surface 150s facing away from the first liquid crystal layer 130 . In this embodiment, the first liquid crystal cell C1 can selectively include a first outer conductor 173 , which is disposed on the outer surface 150 s of the second substrate 150 and is electrically connected to the first inner conductor 172 . The first external conductor 173 can be used as the first contact of the light control element 10 to electrically connect the first electrode 120 on the first substrate 110 with an external driving circuit (not shown). For example, in this embodiment, the first external conductor 173 may be a conductive glue (such as but not limited to: silver glue), but the present disclosure is not limited thereto.

In this embodiment, the first sealant 160 has an opening 161 overlapping the first through hole 151 of the second substrate 150 . The first intermediate conductor 171 is disposed in the opening portion 161 of the first sealant 160 . In the present embodiment, in the top view of the light control element 10 (ie, FIG. 3 ), the first intermediate conductor 171 can be selectively disposed within the outer contour 160e of the first sealant 160 , but the present disclosure does not This is limited.

The first liquid crystal cell C1 also includes a second inner conductor 174 . The peripheral region 150b of the second substrate 150 further has a second through hole 152 . The second inner conductor 174 is disposed in the second through hole 152 and is electrically connected to the second electrode 140 .

For example, in this embodiment, the second electrode 140 may selectively have an opening 142a overlapping the second through hole 152 of the second substrate 150; the first liquid crystal cell C1 further includes an auxiliary conductor 171', is disposed between the second electrode 140 and the first substrate 110, and is electrically connected to the second electrode 140; the second inner conductor 174 may be a conductive glue (such as but not limited to: silver glue), the second inner conductor The 174 can be disposed in the second through hole 152 of the second substrate 150 , in the opening 142 a of the second electrode 140 and on the auxiliary conductor 171 ′, so as to be well electrically connected to the second electrode 140 . However, the present disclosure is not limited to this. In other embodiments, the second inner conductor 174 may also be a conductor (such as but not limited to: copper pillar or copper layer) pre-formed in the second through hole 152 . , the second electrode 140 may be directly formed on the second inner conductor 174, and the second electrode 140 may not have the opening 142a.

In this embodiment, the first liquid crystal cell C1 can optionally include a second outer conductor 175 disposed on the outer surface 150 s of the second substrate 150 and electrically connected to the second inner conductor 174 . The second external conductor 175 can be used as the second contact of the light control element 10 to electrically connect the second electrode 140 on the second substrate 150 with an external driving circuit (not shown). For example, in this embodiment, the second external conductive object 175 may be a conductive glue (such as but not limited to: silver glue), but the present disclosure is not limited thereto.

It is worth mentioning that by using the first intermediate conductor 171 , the first inner conductor 172 and the second inner conductor 174 , the first electrode 120 and the second electrode 140 located inside the light control element 10 can be electrically connected to the set The first contact (ie, the first external conductor 173 ) and the second contact (ie, the first external conductor 173 ) on the outer surface 150s of the second substrate 150 . Two external conductors 175). The first substrate 110 may not retain a bonding area staggered from the second substrate 150 , so as to provide a plurality of pads electrically connected to the first electrode 120 and the second electrode 140 . Thereby, the overall area of the light control element 10 can be reduced.

It must be noted here that the following embodiments use the element numbers and part of the contents of the previous embodiments, wherein the same numbers are used to represent the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

FIG. 6 is a schematic perspective view of a light control device 10A according to an embodiment of the disclosure. FIG. 6 omits the illustration of the first sealant 160 and the second sealant 260 .

FIG. 7 is a schematic top view of a light control device 10A according to an embodiment of the disclosure.

FIG. 8 is a schematic cross-sectional view of a light control device 10A according to an embodiment of the disclosure. Fig. 8 corresponds to section line III-III' of Fig. 7 .

FIG. 9 is a schematic cross-sectional view of a light control device 10A according to an embodiment of the disclosure. Fig. 9 corresponds to the line IV-IVI' of Fig. 7 .

The light control element 10A of this embodiment is similar to the aforementioned light control element 10 , and the main difference between the two is that the light control element 10A of this embodiment further includes a second liquid crystal cell C2 .

Referring to FIGS. 6 to 9 , in this embodiment, the light control element 10A further includes a second liquid crystal cell C2 , which is disposed on the first liquid crystal cell C1 . The second liquid crystal cell C2 includes a third substrate 210 , a third electrode 220 , a second liquid crystal layer 230 , a fourth electrode 240 and a fourth substrate 250 , wherein the first substrate 110 , the first electrode 120 , the first liquid crystal layer 130 , the third The second electrode 140, the second substrate 150, the third substrate 210, the third electrode 220, the first The two liquid crystal layers 230 , the fourth electrode 240 and the fourth substrate 250 are arranged in sequence along the direction z. The second liquid crystal cell C2 further includes a second sealant 260 disposed between the third substrate 210 and the fourth substrate 250 and surrounding the second liquid crystal layer 230 .

The third electrode 220 is disposed on the third substrate 210 and located between the second liquid crystal layer 230 and the third substrate 210 . In this embodiment, the third electrode 220 has a main portion 221 and a connecting portion 222 , the main portion 221 of the third electrode 220 overlaps the second liquid crystal layer 230 , and the connecting portion 222 of the third electrode 220 is located in the second liquid crystal layer 230 outside the area.

The fourth electrode 240 is disposed on the fourth substrate 250 and located between the fourth substrate 250 and the second liquid crystal layer 230 . In this embodiment, the fourth electrode 240 has a main portion 241 and a connecting portion 242 , the main portion 241 of the fourth electrode 240 overlaps the second liquid crystal layer 230 , and the connecting portion 242 of the fourth electrode 240 is located on the second liquid crystal layer 230 . outside the area, and the connection portion 222 of the third electrode 220 and the connection portion 242 of the fourth electrode 240 are staggered.

In this embodiment, the third substrate 210 and the fourth substrate 250 can be selectively transparent substrates; the material of the third substrate 210 is, for example, glass, quartz, organic polymer or other suitable materials; the material of the fourth substrate 250 For example, glass, quartz, organic polymers or other suitable materials; but the present disclosure is not limited thereto.

In this embodiment, the third electrode 220 and the fourth electrode 240 can be selectively transparent conductive layers; the material of the third electrode 220 is, for example, indium tin oxide (ITO), antimony tin oxide (antimony tin) oxide; ATO) or other materials; the material of the fourth electrode 240 is, for example, indium tin oxide (ITO), Antimony tin oxide (ATO) or other materials; but the disclosure is not limited thereto.

The fourth substrate 250 has a peripheral region 250b outside the area of the second liquid crystal layer 230 . The second sealant 260 is disposed between the third substrate 210 and the peripheral region 250b of the fourth substrate 250 . The peripheral region 250b of the fourth substrate 250 has a third through hole 251 , and the third through hole 251 is staggered from the fourth electrode 240 . The third through hole 251 of the fourth substrate 250 does not overlap with the connecting portion 242 of the fourth electrode 240 . The third through hole 251 of the fourth substrate 250 overlaps the connecting portion 222 of the third electrode 220 .

The second liquid crystal cell C2 further includes a third inner conductor 272 disposed in the third through hole 251 of the fourth substrate 250 . For example, in this embodiment, the third inner conductor 272 may be a conductor (eg, but not limited to, a copper pillar or a copper layer) pre-formed in the third through hole 251 . However, the present disclosure is not limited to this, and in other embodiments, the third inner conductor 272 may also be a conductive glue (eg, but not limited to: silver glue).

The second liquid crystal cell C2 further includes a second intermediate conductor 271 disposed between the third substrate 210 and the peripheral region 250b of the fourth substrate 250 and electrically connected to the third electrode 220 and the third inner conductor 272 . For example, in this embodiment, the second intermediate conductors 271 may be conductive pillars (eg, but not limited to, gold pillars) or conductive balls (eg, but not limited to, nickel balls). However, the present disclosure is not limited thereto, and in other embodiments, the second intermediate conductor 271 may also be a conductive glue (eg, but not limited to: silver glue), or a combination of conductive pillars and conductive glue.

The fourth substrate 250 has an outer surface 250s facing away from the second liquid crystal layer 230 . In this embodiment, the second liquid crystal cell C2 can optionally include a third outer conductor 273 disposed on the outer surface 250s of the fourth substrate 250 and electrically connected to the third inner conductor 272 . The third external conductor 273 can be used as the third contact of the light control element 10A to connect the third electrode 220 on the third substrate 210 with an external driving circuit (not shown). For example, in this embodiment, the third external conductor 273 may be a conductive glue (such as, but not limited to, silver glue), but the present disclosure is not limited thereto.

In this embodiment, the second sealant 260 has an opening 261 overlapping the third through hole 251 of the fourth substrate 250 . In this embodiment, the second intermediate conductor 271 can be selectively disposed in the opening portion 261 of the second sealant 260 . In this embodiment, in the top view of the light control element 10A (ie, FIG. 7 ), the second intermediate conductor 271 can be selectively disposed within the outer contour 260e of the second sealant 260 .

The second liquid crystal cell C2 also includes a fourth inner conductor 274 . The peripheral region 250b of the fourth substrate 250 further has fourth through holes 252 . The fourth inner conductor 274 is disposed in the fourth through hole 252 of the fourth substrate 250 and is electrically connected to the fourth electrode 240 . For example, in this embodiment, the fourth inner conductor 274 may be a conductor (eg, but not limited to, a copper pillar or a copper layer) pre-formed in the fourth through hole 252 . However, the present disclosure is not limited to this, and in other embodiments, the fourth inner conductor 274 may also be a conductive glue (eg, but not limited to: silver glue).

In this embodiment, the second liquid crystal cell C2 may optionally include a fourth outer conductor 275 disposed on the outer surface 250s of the fourth substrate 250 and electrically connected to the fourth inner conductor 274 . The fourth external conductor 275 can be used as the fourth contact of the light control element 10A, so that the fourth electrode 240 on the fourth substrate 250 and an external Drive lines (not shown) are connected. For example, in this embodiment, the fourth external conductor 275 may be a conductive glue (such as, but not limited to, silver glue), but the present disclosure is not limited thereto.

In this embodiment, the third substrate 210 has a fifth through hole 211 ; the second liquid crystal cell C2 further includes a fifth inner conductor 276 , which is disposed in the fifth through hole 211 of the third substrate 210 and is electrically connected to the fifth through hole 211 . An internal conductor 172 . For example, in the present embodiment, the light control element 10A may selectively include the first insertion pattern 310 disposed between the third substrate 210 and the second substrate 150 to electrically connect the fifth inner conductor 276 and the The first inner conductor 172 . The first insertion pattern 310 enables the fifth inner conductor 276 to be well electrically connected to the first inner conductor 172 . However, the present disclosure is not limited thereto, and in other embodiments, the first insertion pattern 310 may be omitted, and other methods are used to make the fifth inner conductor 276 well electrically connected to the first inner conductor 172 .

For example, in this embodiment, the fifth inner conductor 276 may be a conductor (eg, but not limited to, a copper pillar or a copper layer) pre-formed in the fifth through hole 211 . However, the present disclosure is not limited thereto, and in other embodiments, the fifth inner conductor 276 may also be a conductive glue (eg, but not limited to: silver glue).

In this embodiment, the fourth substrate 250 has a sixth through hole 253; the second liquid crystal cell C2 further includes a sixth inner conductor 278 disposed in the sixth through hole 253 of the fourth substrate 250; the second liquid crystal cell C2 It further includes a third intermediate conductor 277 disposed between the peripheral region 250b of the fourth substrate 250 and the third substrate 210 and electrically connected to the fifth inner conductor 276 and the sixth inner conductor 278 . The third electrode 220 and the fifth The inner conductor 276 , the third intermediate conductor 277 and the sixth inner conductor 278 are staggered, and the fourth electrode 240 is staggered from the fifth inner conductor 276 , the third intermediate conductor 277 and the sixth inner conductor 278 .

For example, in this embodiment, the sixth inner conductor 278 may be a conductor (eg, but not limited to, a copper pillar or a copper layer) pre-formed in the sixth through hole 253 . However, the present disclosure is not limited thereto, and in other embodiments, the sixth inner conductor 278 may also be a conductive glue (eg, but not limited to: silver glue).

For example, in this embodiment, the third intermediate conductors 277 may be conductive pillars (eg, but not limited to: gold pillars) or conductive balls (eg, but not limited to: nickel balls). However, the present disclosure is not limited thereto, and in other embodiments, the third intermediate conductor 277 may also be a conductive glue (eg, but not limited to: silver glue), or a combination of conductive pillars and conductive glue.

In this embodiment, the second liquid crystal cell C2 can optionally include a first outer conductor 283 disposed on the outer surface 250s of the fourth substrate 250 and electrically connected to the sixth inner conductor 278 . The first outer conductor 283 is electrically connected to the first electrode 120 through the sixth inner conductor 278 , the third intermediate conductor 277 , the fifth inner conductor 276 , the first inner conductor 172 and the first intermediate conductor 171 . The first external conductor 283 can be used as the first contact of the light control element 10A to connect the first electrode 120 on the first substrate 110 with an external driving circuit (not shown). For example, in this embodiment, the first external conductor 283 may be a conductive glue (such as, but not limited to, silver glue), but the present disclosure is not limited thereto.

In this embodiment, the third substrate 210 has a seventh through hole 212, which overlaps with the seventh through hole 212. The second through hole 152 of the second substrate 150; the fourth substrate 250 has an eighth through hole 254 overlapping the seventh through hole 212 of the third substrate 210; the second liquid crystal cell C2 further includes a seventh inner conductor 279, a third Eight inner conductors 281 and a fourth intermediate conductor 280; a seventh inner conductor 279 is disposed in the seventh through hole 212 of the third substrate 210, and is electrically connected to the second inner conductor 174; the eighth inner conductor 281 is disposed in the eighth through hole 254 of the fourth substrate 250; the fourth intermediate conductor 280 is disposed between the peripheral region 250b of the fourth substrate 250 and the third substrate 210, and is electrically connected to the seventh inner conductor 279 and the eighth inner conductor 281 .

For example, in this embodiment, the seventh inner conductor 279 may be a conductor (such as, but not limited to, a copper pillar or a copper layer) pre-formed in the seventh through hole 212 . However, the present disclosure is not limited to this, and in other embodiments, the seventh inner conductor 279 may also be a conductive glue (eg, but not limited to: silver glue).

For example, in this embodiment, the fourth intermediate conductors 280 may be conductive pillars (eg, but not limited to: gold pillars) or conductive balls (eg, but not limited to: nickel balls). However, the present disclosure is not limited thereto, and in other embodiments, the third intermediate conductor 277 may also be a conductive glue (eg, but not limited to: silver glue), or a combination of conductive pillars and conductive glue.

For example, in this embodiment, the eighth inner conductor 281 may be a conductor (eg, but not limited to, a copper pillar or a copper layer) that is pre-formed in the seventh through hole 212 . However, the present disclosure is not limited to this, and in other embodiments, the eighth inner conductor 281 may also be a conductive glue (eg, but not limited to: silver glue).

In this embodiment, the second liquid crystal cell C2 may optionally include a second outer The conductor 282 is disposed on the outer surface 250s of the fourth substrate 250 and is electrically connected to the eighth inner conductor 281 . The second outer conductor 282 is electrically connected to the second electrode 140 through the eighth inner conductor 281 , the third intermediate conductor 277 , the seventh inner conductor 279 and the second inner conductor 174 . The second external conductor 282 can be used as the second contact of the light control element 10A to connect the second electrode 140 on the second substrate 150 with an external driving circuit (not shown). For example, in this embodiment, the second external conductor 282 may be a conductive glue (such as, but not limited to, silver glue), but the present disclosure is not limited thereto.

In this embodiment, the light control element 10A can optionally include a second insertion pattern 320 disposed between the third substrate 210 and the second substrate 150 to electrically connect the seventh inner conductor 279 and the second inner conductor Object 174. The second insertion pattern 320 enables the seventh inner conductor 279 to be well electrically connected to the second inner conductor 174 . However, the present disclosure is not limited thereto, and in other embodiments, the arrangement of the second insertion pattern 320 may be omitted, and other methods are used to make the seventh inner conductor 279 well electrically connected to the second inner conductor 174 .

In addition, in this embodiment, the second liquid crystal cell C2 may optionally include an auxiliary conductor 284 disposed between the fourth electrode 240 and the third substrate 210 and electrically connected to the fourth electrode 240 . The auxiliary conductors 284 and the second intermediate conductors 271 can be symmetrically arranged, so that the stress is distributed evenly during the assembly process of the second liquid crystal cell C2 , which helps to improve the manufacturing yield of the light control element 10A. However, the present disclosure is not limited thereto, and in other embodiments, the auxiliary conductor 284 may also be omitted.

Similarly, in this embodiment, the first liquid crystal cell C1 can also selectively contain An auxiliary conductor 171' is included, disposed between the second electrode 140 and the first substrate 110, and electrically connected to the second electrode 140. The auxiliary conductors 171' and the first intermediate conductors 171 can be arranged symmetrically, so that the stress is evenly distributed during the assembly process of the first liquid crystal cell C1, which helps to improve the manufacturing yield of the light control element 10A. However, the present disclosure is not limited thereto, and in other embodiments, the auxiliary conductor 171' may also be omitted.

FIG. 10 is a schematic top view of a light control device 10B according to an embodiment of the disclosure.

FIG. 11 is a schematic cross-sectional view of a light control device 10B according to an embodiment of the disclosure. Fig. 11 corresponds to the line V-V' of Fig. 10 .

The light control element 10B of FIGS. 10 and 11 is similar to the light control element 10A of FIGS. 7 and 9 , and the differences between the two will be described below.

In the embodiments of FIGS. 7 and 9 , the auxiliary conductors 171 ′, the first intermediate conductors 171 , the second inner conductors 174 and the first inner conductors 172 may be disposed within the outer contour 160e of the first sealant 160 , and the seventh inner conductor 279, the fifth inner conductor 276, the fourth intermediate conductor 280, the third intermediate conductor 277, the auxiliary conductor 284, the second intermediate conductor 271, the eighth inner conductor 281, the third The four inner conductors 274 , the third inner conductor 272 and the sixth inner conductor 278 may be disposed within the outer contour 260e of the second sealant 260 .

In the embodiments of FIGS. 10 and 11 , in the top view of the light control element 10B, the auxiliary conductor 171 ′, the first intermediate conductor 171 , the second inner conductor 174 and the first inner conductor 172 are disposed on the first Outside the outer contour 160e of the sealant 160, the seventh inner conductor 279, the fifth inner conductor 276, the fourth intermediate conductor 280, the third intermediate conductor 277, the auxiliary conductor 284, and the second intermediate conductor 271 , The eighth inner conductor 281 , the fourth inner conductor 274 , the third inner conductor 272 and the sixth inner conductor 278 may be disposed outside the outer contour 260 e of the second sealant 260 .

FIG. 12 is a schematic cross-sectional view of a light control device 10C according to an embodiment of the disclosure.

FIG. 13 is a schematic perspective view of a part of the light control device 10C according to an embodiment of the disclosure. FIG. 13 corresponds to the region R of FIG. 12 . FIG. 13 omits the first sealant 160 and the second sealant 260 of FIG. 12 .

The light control element 10C of FIGS. 12 and 13 is similar to the light control element 10A of FIGS. 7 and 9 , and the differences between the two will be described below.

Referring to FIGS. 12 and 13 , in this embodiment, the first intermediate conductor 171 can selectively include a first portion 171-1 and a second portion 171-2, and the first portion 171-1 has a through hole 171a. And the second part 171-2 is disposed in the through hole 171a of the first part 171-1. For example, in this embodiment, the first portion 171 - 1 of the first intermediate conductor 171 is a conductive pillar (such as but not limited to: a copper pillar) having a through hole 171 a , and the second portion of the first intermediate conductor 171 is a conductive pillar (such as but not limited to: a copper pillar). The portion 171-2 is a conductive glue (eg, but not limited to: silver glue) disposed in the through hole 171a.

In this embodiment, the auxiliary conductor 171' can selectively include a first part 171'-1 and a second part 171'-2, the first part 171'-1 has a through hole 171'a, and the second part 171'-2 is disposed in the through hole 171'a of the first part 171'-1. For example, in this embodiment, the first portion 171'-1 of the auxiliary conductor 171' is a conductive pillar (such as but not limited to: a copper pillar) having a through hole 171'a, and the first portion 171'-1 of the auxiliary conductor 171' The second part 171'-2 is a conductive glue (such as but not limited to: silver glue) disposed in the through hole 171'a.

In this embodiment, the first inner conductor 172 may be a conductive glue (eg Such as but not limited to: silver glue); the second inner conductive object 174 can be a conductive glue (such as but not limited to: silver glue); the seventh inner conductive object 279 can be a conductive glue (such as but not limited to: silver glue) ; The fifth inner conductor 276 may be a conductive glue (such as but not limited to: silver glue).

In this embodiment, the third intermediate conductor 277 can selectively include a first part 277-1 and a second part 277-2, the first part 277-1 has a through hole 277a, and the second part 277-2 is provided in the through hole 277a of the first part 277-1. For example, in this embodiment, the first portion 277-1 of the third intermediate conductor 277 is a conductive pillar (such as but not limited to: a copper pillar) having a through hole 277a, and the second portion of the third intermediate conductor 277 The portion 277-2 is a conductive glue (eg, but not limited to, silver glue) disposed in the through hole 277a.

In this embodiment, the fourth intermediate conductor 280 can selectively include a first part 280-1 and a second part 280-2, the first part 280-1 has a through hole 280a, and the second part 280-2 is provided in the through hole 280a of the first part 280-1. For example, in this embodiment, the first portion 280 - 1 of the fourth intermediate conductor 280 is a conductive pillar (such as but not limited to: a copper pillar) having a through hole 280 a, and the second portion of the fourth intermediate conductor 280 The portion 280-2 is a conductive glue (eg, but not limited to, silver glue) disposed in the through hole 280a.

In this embodiment, the eighth inner conductor 281 may be a conductive glue (such as but not limited to: silver glue); the fourth inner conductor 274 may be a conductive glue (such as but not limited to: silver glue); the third The inner conductor 272 may be a conductive glue (eg, but not limited to, silver glue); the sixth inner conductor 278 may be a conductive glue (eg, but not limited to, silver glue).

In the manufacturing process of the light control element 10C of this embodiment, the A through hole 171 a of the intermediate conductor 171 , the first through hole 151 of the second substrate 150 , the fifth through hole 211 of the third substrate 210 , the through hole 277 a of the third intermediate conductor 277 , the sixth through hole 211 of the fourth substrate 250 A conductive paste (such as but not limited to: silver paste) is filled on the through hole 253 and the outer surface 250s of the fourth substrate 250 to form the second portion 171 - 2 of the first intermediate conductor 171 and the first inner conductor 172 , the fifth inner conductor 276 , the second portion 277 - 2 of the third intermediate conductor 277 , the sixth inner conductor 278 and the first outer conductor 283 . Therefore, in this embodiment, the second portion 171-2 of the first intermediate conductor 171, the first inner conductor 172, the fifth inner conductor 276, the second portion 277-2 of the third intermediate conductor 277, The materials of the sixth inner conductor 278 and the first outer conductor 283 are the same.

Similarly, in the manufacturing process of the light control device 10C of this embodiment, the through holes 171 ′ a of the auxiliary conductors 171 ′, the second through holes 152 of the second substrate 150 , and the first through holes 152 of the third substrate 210 can be selectively formed. Conductive glue (such as but not limited to: silver glue) is filled on the five through holes 211 , the through holes 280 a of the fourth intermediate conductor 280 , the eighth through holes 254 of the fourth substrate 250 and the outer surface 250 s of the fourth substrate 250 , to form the second portion 171'-2 of the auxiliary conductor 171', the second inner conductor 174, the seventh inner conductor 279, the second portion 280-2 of the fourth intermediate conductor 280, and the eighth inner conductor 281 and the second external conductor 282 . Therefore, in this embodiment, the second portion 171'-2 of the auxiliary conductor 171', the second inner conductor 174, the seventh inner conductor 279, the second portion 280-2 of the fourth intermediate conductor 280, The materials of the eighth inner conductor 281 and the second outer conductor 282 are the same.

10: Light control components

110: The first substrate

120: The first electrode

121, 141: Main Department

122, 142: connecting part

130: the first liquid crystal layer

140: Second electrode

150: Second substrate

150s: outer surface

151: The first through hole

152: Second through hole

171: The first intermediate conductor

171': Auxiliary Conductor

172: The first internal conductor

173: The first external conductor

174: Second internal conductor

175: Second external conductor

z: direction

Claims (20)

An adjustable light projection device, comprising: a light source for emitting a light beam; and A light control element is arranged on the transmission path of the light beam, wherein the light control element includes: a first substrate; a first electrode; a first liquid crystal layer; a second electrode; a second substrate, wherein the first substrate, the first electrode, the first liquid crystal layer, the second electrode and the second substrate are sequentially arranged along a direction, and the second substrate has the area of the first liquid crystal layer an outer peripheral area, the peripheral area of the second substrate has a first through hole, and the first through hole and the second electrode are staggered; a first inner conductor disposed in the first through hole of the second substrate; a first intermediate conductor disposed between the peripheral region of the second substrate and the first substrate, and electrically connected to the first electrode and the first inner conductor; and a second inner conductor, wherein the peripheral region of the second substrate further has a second through hole, the second inner conductor is disposed in the second through hole of the second substrate and is electrically connected to the first through hole Two electrodes. The adjustable light projection device according to claim 1, wherein the light control element further comprises: a third substrate; a third electrode; a second liquid crystal layer; a fourth electrode; a fourth substrate, wherein the first substrate, the first electrode, the first liquid crystal layer, the second electrode, the second substrate, the third substrate, the third electrode, the second liquid crystal layer, the first Four electrodes and the fourth substrate are arranged in sequence along the direction, the fourth substrate has a peripheral area outside the area of the second liquid crystal layer, the peripheral area of the fourth substrate has a third through hole, and the third The through hole is staggered from the fourth electrode; a third inner conductor disposed in the third through hole of the fourth substrate; and A second intermediate conductor is disposed between the third substrate and the peripheral region of the fourth substrate, and is electrically connected to the third electrode and the third inner conductor. The adjustable light projection device according to claim 2, wherein the peripheral region of the fourth substrate further has a fourth through hole, and the light control element further comprises: A fourth inner conductor is disposed in the fourth through hole of the fourth substrate and is electrically connected to the fourth electrode. The adjustable light projection device of claim 2, wherein the third substrate has a fifth through hole; the fourth substrate has a sixth through hole; the light control element further comprises: a fifth inner conductor disposed in the fifth through hole of the third substrate and electrically connected to the first inner conductor; a sixth inner conductor disposed in the sixth through hole of the fourth substrate; and A third intermediate conductor is disposed between the peripheral region of the fourth substrate and the third substrate, and is electrically connected to the fifth inner conductor and the sixth inner conductor. The adjustable light projection device of claim 4, wherein the third electrode is staggered from the fifth inner conductor, the sixth inner conductor and the third intermediate conductor, and the fourth electrode and the fifth The inner conductor, the sixth inner conductor and the third intermediate conductor are staggered. The adjustable light projection device of claim 4, wherein the third substrate has a seventh through hole; the fourth substrate has an eighth through hole; the light control element further comprises: a seventh inner conductor disposed in the seventh through hole of the third substrate and electrically connected to the second inner conductor; an eighth inner conductor disposed in the eighth through hole of the fourth substrate; and A fourth intermediate conductor is disposed between the peripheral region of the fourth substrate and the third substrate, and is electrically connected to the seventh inner conductor and the eighth inner conductor. The adjustable light projection device as claimed in claim 6, wherein the light control element further comprises: A first insertion pattern is disposed between the third substrate and the second substrate to electrically connect the fifth inner conductor and the first inner conductor. The adjustable light projection device as claimed in claim 6, wherein the light control element further comprises: A second insertion pattern is disposed between the third substrate and the second substrate to electrically connect the seventh inner conductor and the second inner conductor. The adjustable light projection device according to claim 1, wherein the light control element further comprises: a first sealant disposed between the first substrate and the peripheral region of the second substrate, wherein the first liquid crystal layer is disposed in a space enclosed by the first sealant; The first sealant has an opening, the first through hole of the second substrate overlaps the opening of the first sealant, and the first intermediate conductor is disposed on the opening of the first sealant . The adjustable light projection device according to claim 9, wherein the material of the first inner conductive object and the material of at least a part of the first intermediate conductive object are the same. A light control element, comprising: a first substrate; a first electrode; a first liquid crystal layer; a second electrode; a second substrate, wherein the first substrate, the first electrode, the first liquid crystal layer, the second electrode and the second substrate are sequentially arranged along a direction, and the second substrate has the area of the first liquid crystal layer an outer peripheral area, the peripheral area of the second substrate has a first through hole, and the first through hole and the second electrode are staggered; a first inner conductor disposed in the first through hole of the second substrate; a first intermediate conductor disposed between the peripheral region of the second substrate and the first substrate, and electrically connected to the first electrode and the first inner conductor; and a second inner conductor, wherein the peripheral region of the second substrate further has a second through hole, the second inner conductor is disposed in the second through hole of the second substrate and is electrically connected to the first through hole Two electrodes. The light control element according to claim 11, further comprising: a third substrate; a third electrode; a second liquid crystal layer; a fourth electrode; a fourth substrate, wherein the first substrate, the first electrode, the first liquid crystal layer, the second electrode, the second substrate, the third substrate, the third electrode, the second liquid crystal layer, the first Four electrodes and the fourth substrate are arranged in sequence along the direction, the fourth substrate has a peripheral area outside the area of the second liquid crystal layer, the peripheral area of the fourth substrate has a third through hole, and the third The through hole is staggered from the fourth electrode; a third inner conductor disposed in the third through hole of the fourth substrate; and A second intermediate conductor is disposed between the third substrate and the peripheral region of the fourth substrate, and is electrically connected to the third electrode and the third inner conductor. The light control element according to claim 12, wherein the peripheral region of the fourth substrate further has a fourth through hole, and the light control element further comprises: A fourth inner conductor is disposed in the fourth through hole of the fourth substrate and is electrically connected to the fourth electrode. The light control element of claim 12, wherein the third substrate has a fifth through hole; the fourth substrate has a sixth through hole; the light control element further comprises: a fifth inner conductor disposed in the fifth through hole of the third substrate and electrically connected to the first inner conductor; a sixth inner conductor disposed in the sixth through hole of the fourth substrate; and A third intermediate conductor is disposed between the peripheral region of the fourth substrate and the third substrate, and is electrically connected to the fifth inner conductor and the sixth inner conductor. The light control element of claim 14, wherein the third electrode is staggered from the fifth inner conductor, the sixth inner conductor and the third intermediate conductor, and the fourth electrode and the fifth inner conductor are electrically conductive The object, the sixth inner conductive object and the third intermediate conductive object are staggered. The light control element according to claim 14, wherein the third substrate has a seventh through hole; the fourth substrate has an eighth through hole; the light control element further comprises: a seventh inner conductor disposed in the seventh through hole of the third substrate and electrically connected to the second inner conductor; an eighth inner conductor disposed in the eighth through hole of the fourth substrate; and A fourth intermediate conductor is disposed between the peripheral region of the fourth substrate and the third substrate, and is electrically connected to the seventh inner conductor and the eighth inner conductor. The light control element according to claim 16, further comprising: A first insertion pattern is disposed between the third substrate and the second substrate to electrically connect the fifth inner conductor and the first inner conductor. The light control element according to claim 16, further comprising: A second insertion pattern is disposed between the third substrate and the second substrate to electrically connect the seventh inner conductor and the second inner conductor. The light control element according to claim 11, further comprising: a first sealant disposed between the first substrate and the peripheral region of the second substrate, wherein the first liquid crystal layer is disposed in a space enclosed by the first sealant; The first sealant has an opening, the first through hole of the second substrate overlaps the opening of the first sealant, and the first intermediate conductor is disposed on the opening of the first sealant . The light control element according to claim 19, wherein the material of the first inner conductive object and the material of at least a part of the first intermediate conductive object are the same.

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