Projector

a projector and rear projector technology, applied in the field of projectors, can solve the problems of insufficient adjustment of conventional rear projectors and inability to be thinner

Inactive Publication Date: 2010-01-07
CHUNGHWA PICTURE TUBES LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]The projector of the invention makes the optical image travel through the optical transmission medium before it is transmitted to the display screen, in which the refraction index of the optical transmission medium is not equal to one. Besides, the invention may change the reflection surface curvature of the reflector in order to control the incident angle, in which the optical image is incident to the optical transmission medium, so as to change the transmission path of the optical image. In other words, the transmission path of the optical image of the projector is changed by controlling the refraction index of the optical transmission medium and adjusting the reflection surface curvature of the reflector, to thin the projector.

Problems solved by technology

However, if the included angle between the optical image 112 and the display screen 120 is wrong or the transmission path needs to be changed, the conventional rear projector can't adjust appropriately.
Also, the volume of the rear projector is constrained by the design of the optical path, and the rear projector can't be thinner.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Projector
  • Projector
  • Projector

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0023]FIG. 3 is a schematic cross-sectional view showing a projector according to the invention. Please refer to FIG. 3, the projector 300 comprises a display screen 320 and an imaging system 310. The imaging system 310 is adapted for providing an optical image 312 and the optical image 312 is transmitted to the display screen 320 through an optical transmission medium 330, in which the refraction index of the optical transmission medium 330 is not equal to one. The optical transmission medium 330 may be a solid material, a liquid material, liquid crystals, etc.

[0024]It should be noted that in an embodiment, the refraction index of the optical transmission medium 330 changes with the transmission path of the optical image 312 for example, and the optical transmission medium 330 is composed of at least two materials for example. In other words, the optical transmission medium 330 can be a solid material, a liquid material, liquid crystals or any combinations of these materials.

[0025]...

second embodiment

[0028]FIG. 4 is a schematic cross-sectional view showing a projector according to the invention. Please refer to FIG. 4, the projector 400 comprises an imaging system 410, a display screen 420, an optical transmission medium 430 and a reflector 440. The imaging system 410 is adapted for providing an optical image 412 and is disposed at the same side as the display screen 420. So, the optical image 412 is reflected by the reflector 440 in advance and then it is transmitted to the display screen 420. A refraction space 422 is formed between the reflector 440 and the display screen 420, and the optical transmission medium 430 is disposed in the refraction space 422. Accordingly, after the optical image 412 is reflected by the reflector 440, it travels through the optical transmission medium 430 in advance and then is transmitted to the display screen 420. The refraction index of the optical transmission medium 430 is not equal to one.

[0029]It should be noted that the optical transmissi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A projector includes a display screen, an imaging system adapted to provide an optical image, a reflector arranged on a transmission path of the optical image, and an optical transmission medium disposed inside the refraction space. The refraction space is formed between the reflector and the display screen. The optical image travels through the optical transmission medium by the reflection of the reflector and is transmitted to the display screen. A refractive index of the optical transmission medium is not equal to one.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a divisional application of and claims priority benefit of an application Ser. No. 11 / 163,681, filed on Oct. 27, 2005, now allowed. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention generally relates to a projector. More particularly, the invention relates to a projector and the volume of the projector is minimized by a medium to adjust the refraction path of the light.[0004]2. Description of Related Art[0005]The advancement of multi-media systems in our society depends to a large extent on the progressive development of semiconductor devices and display devices. For displays, because direct-viewing displays have definite dimensional limitations, the integration of a high-resolution indirect viewing display panel with an efficient optical engine has become th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): G02F1/1335G03B21/28
CPCG03B21/28G03B21/10
InventorCHERN, JYH-LONGCHANG, RAN-HONGCHENG, YI -KAICHOU, MING-DER
OwnerCHUNGHWA PICTURE TUBES LTD