PROJECTION-TYPE DISPLAY DEVICE

• Main Author: KONO TOSHIRO
• Format: Patent
• Language: English; Japanese
• Published: 14.05.2024
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BASIC ELECTRIC ELEMENTS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CINEMATOGRAPHY; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PHOTOGRAPHY; PHYSICS; PRINTED CIRCUITS; SEMICONDUCTOR DEVICES

To provide a projection-type display device which can effectively heat a refractive-type liquid crystal display element by a heat generation source, the heat generation source rarely reducing the cooling performance of cooling the refractive liquid crystal display element.SOLUTION: In at least one of the longer direction and the shorter direction of a refractive liquid crystal display element 1, the length of the refractive liquid crystal display element 1 is L1, the length of the heat generation source 3 is L3, and the thickness of a base 21 of a heat sink 2 is t. The refractive liquid crystal display element 1 and the heat generation source 3 face each other across the base 21 so that the length L3 of the heat generation source is within the length L1 of the refractive liquid crystal display element 1. The length L3 of the heat generation source 3 satisfies the relation of L3≥L1-2 t.SELECTED DRAWING: Figure 1 【課題】発熱源によって反射型液晶表示素子を効果的に加熱することができ、発熱源が、反射型液晶表示素子を冷却する冷却性能をほとんど低減させることのない投射型表示装置を提供する。【解決手段】反射型液晶表示素子１の長手方向または短手方向の少なくとも一方の方向において、反射型液晶表示素子１の長さをＬ１、発熱源３の長さをＬ３、ヒートシンク２のベース２１の板厚をｔとする。発熱源の長さＬ３が反射型液晶表示素子の長さＬ１内に位置するように、反射型液晶表示素子１と発熱源３とがベース２１を挟んで対向する。発熱源３の長さＬ３はＬ３≧Ｌ１－２ｔを満たす。【選択図】図１