# US 2015/0177431 A1 · Electronic apparatus, electronic device, and light-transmissive cover member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0177431 A1 - Document ID: US20150177431A1 - Status: Published application - Kind: A1 - Application number: 14/459,920 - Filed: 2014-08-14 - Published: 2015-06-25 - Earliest claimed: 2013-12-21 - Assignees: KYOCERA Corporation - Applicants: KYOCERA Corporation - Inventors: Motohiro Umehara; Shin Murakami - Web page: https://patentgrep.com/patent/US20150177431A1 ## CPC - G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation} - G02B 1/02: made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence) - H04M 1/0266: {for a display module assembly} - H04R 17/005: {using a piezoelectric polymer} - H04M 1/0279: {Improving the user comfort or ergonomics} - H04M 1/03: Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets - H04R 2400/03: Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones - H04R 2499/11: Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract An electronic apparatus, a light-transmissive cover member, and an electronic device are disclosed. The electronic apparatus may include an image display device that includes an image display surface and a light-transmissive cover member. The light-transmissive cover member is arranged such that at least part of the light-transmissive cover member faces the image display surface. The light-transmissive cover member is a single crystal that contains alumina (Al2O3) as a main component. Due to the light-transmissive cover member, the transmittance of light having a wavelength of 260 nm is less than 92% of the transmittance of light having a wavelength of approximately 550 nm. ## Claims ### Claim 1 An electronic apparatus, comprising: an image display device comprising an image display surface; and a cover member, comprising a single crystal sapphire body mainly containing alumina (Al203), arranged to at least partially face the image display surface, the cover member being light-transmissive and having a first transmittance of light having a wavelength of 260 nm that is less than 92% of a second transmittance of light having a wavelength of 550 nm. ### Claim 2 (depends on 1) The electronic apparatus according to claim 1, wherein the first transmittance is less than 72% of the second transmittance. ### Claim 3 (depends on 1) The electronic apparatus according to claim 1, wherein the first transmittance is less than 50% of the second transmittance. ### Claim 4 (depends on 1) The electronic apparatus according to claim 1, wherein the cover member has a first average value of transmittances of lights having wavelengths between 230 nm and 300 nm is less than 92% of a second average value of transmittances of lights having wavelengths between 500 nm and 800 nm. ### Claim 5 (depends on 4) The electronic apparatus according to claim 4, wherein the first average value is less than 85% of the second average value. ### Claim 6 (depends on 1) The electronic apparatus according to claim 1, wherein the cover member further comprises at least one element selected from a group consisting of Co, Ni, Na, Ti, Cr, Fe, and Cu in a total amount of 3×10−4% by mass or more. ### Claim 7 (depends on 1) The electronic apparatus according to claim 1, wherein the cover member further comprises at least one element selected from a group consisting of Ti, Fe, and Cu in a total amount of 3×10−4% by mass or more. ### Claim 8 (depends on 1) The electronic apparatus according to claim 1, wherein the cover member contains Cr. ### Claim 9 (depends on 8) The electronic apparatus according to claim 8, wherein the amount of Cr is 5×10−5% by mass or more, and a thickness of the cover member in a direction perpendicular to a principal surface is smaller than 1 mm. ### Claim 10 (depends on 1) The electronic apparatus according to claim 1, wherein the cover member contains alumina whose content ratio of oxygen is smaller than the ideal chemical equivalent. ### Claim 11 (depends on 1) The electronic apparatus according to claim 1, wherein the image display surface is planar, and the cover member is a plate that includes a planar surface facing the image display surface. ### Claim 12 (depends on 1) The electronic apparatus according to claim 1, wherein the cover member is a plate having a rectangular shape in a plan view. ### Claim 13 (depends on 1) The electronic apparatus according to claim 1, wherein the image display device is a liquid crystal display panel or an organic EL device. ### Claim 14 (depends on 1) The electronic apparatus according to claim 1, further comprising: a piezoelectric vibrating element arranged on the cover member that vibrates by a driving voltage based on a sound signal. ### Claim 15 (depends on 14) The electronic apparatus according to claim 14, wherein the piezoelectric vibrating element vibrates for transmitting a conduction sound based on the sound signal. ### Claim 16 (depends on 14) The electronic apparatus according to claim 14, wherein the piezoelectric vibrating element has a long and narrow rectangular plate shape. ### Claim 17 (depends on 14) The electronic apparatus according to claim 14, further comprising: wherein the piezoelectric vibrating element is arranged in a position which is not overlapped with the image display device. ### Claim 18 A light-transmissive cover member for an electronic apparatus that is disposed such that at least part of the light-transmissive cover member faces an image display surface of an image display device, the light-transmissive cover member comprising a single crystal sapphire body containing alumina as a main component, and having a transmittance of light having a wavelength of 260 nm which is less than 92% of a transmittance of light having a wavelength of 550 nm. ### Claim 19 (depends on 18) The light-transmissive cover member according to claim 18, further having an average value of a transmittance (%) of light having a wavelength range of 230 nm to 300 nm which is less than 92% of an average value of a transmittance (%) of light having a wavelength range of 500 nm to 800 nm. ### Claim 20 An electronic device, comprising: an image display device comprising an image display surface; and a light-transmissive sapphire cover member, at least partially covering the image display surface, and having first and second transmittances of light having a wavelength of 260 nm and 550 nm respectively, wherein the first transmittance is less than 85% of the second transmittance.