Compact camera module

Patent metadata

Field	Value
Publication number	US-10280282-B2
Application number	US-201314052800-A
Country	US
Kind code	B2
Filing date	Oct 14, 2013
Priority date	Mar 13, 2013
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A compact camera module that contains a generally planar base on which is mounted a lens barrel is provided. The base, barrel, or both are molded from a polymer composition that includes a thermotropic liquid crystalline polymer and a plurality of mineral fibers (also known as “whisker”). The mineral fibers have a median width of from about 1 to about 35 micrometers and constitute from about 5 wt % to about 60 wt. % of the polymer composition.

First claim

What is claimed is:

1. A compact camera module that comprises a generally planar base on which is mounted a lens barrel, wherein the base, barrel, or both have a thickness of about 500 micrometers or less and are molded from a polymer composition that comprises a thermotropic liquid crystalline polymer, and a plurality of fibers consisting of mineral fibers, wherein the mineral fibers have a median width of from about 1 to about 35 micrometers and constitute from about 5 wt. % to about 40 wt. % of the polymer composition, wherein the mineral fibers have an aspect ratio of from about 2 to about 20, wherein liquid crystalline polymers constitute from about 40 wt. % to about 80 wt. % of the composition.

2. The compact camera module of claim 1 , wherein the thickness is from about 100 to about 450 micrometers.

3. The compact camera module of claim 1 , wherein the liquid crystalline polymer contains aromatic ester repeating units.

4. The compact camera module of claim 3 , wherein the aromatic ester repeating units are aromatic dicarboxylic acid repeating units, aromatic hydroxycarboxylic acid repeating units, or a combination thereof.

5. The compact camera module of claim 3 , wherein the polymer further contains aromatic diol repeating units.

6. The compact camera module of claim 1 , wherein the liquid crystalline polymer contains repeating units derived from 4-hydroxybenzoic acid, terephthalic acid, hydroquinone, 4,4′-biphenol, acetaminophen, 6-hydroxy-2-naphthoic acid, 2,6-naphthalene dicarboxylic acid, or a combination thereof.

7. The compact camera module of claim 1 , wherein at least about 60% by volume of the mineral fibers have a diameter of from about 1 to about 35 micrometers.

8. The compact camera module of claim 1 , wherein the mineral fibers have an aspect ratio of from about 4 to about 15.

9. The compact camera module of claim 1 , wherein the mineral fibers have a median width of from about 3 to about 15 micrometers.

10. The compact camera module of claim 1 , wherein the mineral fibers include fibers derived from a silicate.

11. The compact camera module of claim 10 , wherein the silicate is an inosilicate.

12. The compact camera module of claim 11 , wherein the inosilicate includes wollastonite.

13. The compact camera module of claim 1 , wherein the mineral fibers include a sulfate.

14. The compact camera module of claim 1 , further wherein the polymer composition comprises a functional compound.

15. The compact camera module of claim 14 , wherein the functional compound includes an aromatic compound that is an aromatic dial, aromatic carboxylic acid, or a combination thereof.

16. The compact camera module of claim 14 , wherein the functional compound includes a non-aromatic compound that is a hydrate.

17. The compact camera module of claim 1 , wherein the composition has a melt viscosity of from about 0.1 to about 80 Pa-s, as determined in accordance with ISO Test No. 11443 at a shear rate of 1000 seconds −1 and temperature that is 15° C. above the melting temperature of the composition.

18. The compact camera module of claim 1 , wherein the base, barrel, or both have a surface glossiness of about 35% or more at an incident light angle of 85°.

19. The compact camera module of claim 1 , wherein the polymer composition exhibits a surface resistivity of about 1×10 15 ohms or less.

20. The compact camera module of claim 1 , wherein the polymer composition is generally free of glass fibers.

21. The compact camera module of claim 1 , wherein the conductive fillers constitutes from about 0.4 wt. % to about 3 wt. % of the composition.

22. The compact camera module of claim 1 , wherein the composition comprises a conductive filler comprising an ionic liquid.

23. The compact camera module of claim 22 , wherein the ionic liquid contains a cationic species and counterion.

24. The compact camera module of claim 23 , wherein the ionic liquid includes bis(pentafluoroethylsulfonyl)imide, bis(trifluoromethylsulfonyl)imide, and bis(trifluoromethyl)imide, or a combination thereof.

Assignees

• Ticona Llc

Inventors

• Kim Young Shin

Classifications

• B29C48/40

  using two or more parallel screws {or at least two parallel non-intermeshing screws}, e.g. twin screw extruders · CPC title

• Y10T428/1372

  Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes · CPC title

• B29C48/919

  using a bath, e.g. extruding into an open bath to coagulate or cool the material · CPC title

• B29C48/345

  Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising · CPC title

• B29C48/92

  Measuring, controlling or regulating · CPC title