KR970064275A - Single panel liquid crystal projection device - Google Patents

Abstract

In particular, the present invention relates to a single panel liquid crystal projection apparatus. More particularly, the present invention relates to a single panel liquid crystal projection apparatus in which a white beam emitted from a light source is separated by a color separation mirror and incident on a liquid crystal panel to modulate light intensity, To thereby improve light utilization efficiency and image quality.

The present apparatus has an advantage that the size of the projection lens can be reduced and the economical efficiency can be improved by compensating for the color beams incident on the projection lens in parallel after the lens array is disposed on the emission side of the liquid crystal panel and passing through the liquid crystal panel. As a result, the color beams are formed on the screen at the same angle, thereby eliminating the color shading phenomenon, so that the image quality is smooth and continuous image quality can be obtained.

Description

Single panel liquid crystal projection device

Since this is a trivial issue, I did not include the contents of the text.

Figure 1 is a light path diagram of a liquid crystal projection apparatus that improves light utilization efficiency developed by Sharp.

FIG. 2 is an explanatory view for explaining an optical path of R, G and B beams incident on a liquid crystal panel through a lens array; FIG.

FIG. 3 is an explanatory view showing a pixel configuration and a color configuration of a general liquid crystal panel. FIG.

FIG. 4 is a perspective view of a single panel liquid crystal projection apparatus according to the present invention; FIG.

FIG. 5 is a perspective view showing the shape of a lens array. FIG.

6 is an optical path diagram for explaining the light input / output state of the liquid crystal panel in the present apparatus.

Claims (3)

A liquid crystal projection apparatus for optically modulating a beam emitted from a light source in a liquid crystal display element of a single panel and projecting the beam onto a screen through a projection lens to form an image, the projector comprising: a light source for separating white light emitted from the light source into R, G and B beams Optical separation means; A first lens array configured to arrange microlenses for irradiating R, G and B beams separated and emitted by the optical splitting means to respective pixels of the liquid crystal display element; And a second lens array consisting of microlenses for refracting the R, G and B beams emitted from corresponding pixels of the liquid crystal display element at a predetermined angle and emitting the parallel rays to the projection lens. 2. The liquid crystal display according to claim 1, wherein each microlens of the first lens array arranged on the incident side of the liquid crystal display element has a diameter D , The distance from the liquid crystal display element to T , The power (R ) Of the liquid crystal panel (1). Next : P = D / 2T 3. The liquid crystal display according to claim 1 or 2, wherein each microlens of the second lens array disposed on the emission side of the liquid crystal display element has a directivity of D , The distance from the liquid crystal display element to T At the time of lowering, the power (P ) Of the liquid crystal panel (1). Next : P = D / [2 x (T + T )] ※ Note: It is disclosed by the contents of the first application.